fix(changelog): resolve embedded notes by semver core (#373)

Whats New and the post-update modal required an exact ## [version] header,
so prerelease package versions (rc, dev) often had no matching section.
Match on major.minor.patch first; if several sections share the core,
prefer a plain X.Y.Z heading when present.

.cargo/config.toml

@@ -0,0 +1,12 @@
+# Arch Linux's rust package bakes -fuse-ld=lld into the default rustflags.
+# ring (pulled in by tauri-plugin-updater) ships C/asm objects that lld cannot
+# resolve (ring_core_* symbols). Fix: force cc as linker driver and append
+# -fuse-ld=bfd so it overrides the hardcoded -fuse-ld=lld (last flag wins).
+# bfd is always available via binutils (part of base-devel on Arch).
+#
+# NOTE: When building via makepkg (AUR), RUSTFLAGS from /etc/makepkg.conf
+# overrides target-specific rustflags here. The PKGBUILD's build() applies
+# the same fix by patching the RUSTFLAGS env var directly.
+[target.x86_64-unknown-linux-gnu]
+linker = "cc"
+rustflags = ["-C", "link-arg=-fuse-ld=bfd"]

.github/FUNDING.yml

@@ -0,0 +1,15 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: psychotoxic
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+polar: # Replace with a single Polar username
+buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
+thanks_dev: # Replace with a single thanks.dev username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

.github/workflows/ci-main.yml

@@ -0,0 +1,15 @@
+name: ci-main
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  ci-ok:
+    runs-on: ubuntu-latest
+    steps:
+      - name: ci sentinel
+        run: echo "main CI sentinel is green"

.github/workflows/next.yml

@@ -0,0 +1,33 @@
+name: Next Channel
+
+# Pushes made with the default GITHUB_TOKEN from another workflow (e.g. Promote main to next)
+# do not trigger push workflows — GitHub blocks recursive runs. Use workflow_run below.
+#
+# workflow_dispatch: set "Use workflow from branch" to `main` so reusable-channel-publish.yml
+# is the latest (tag guards, etc.). The tree built for artifacts is always ref `next` below.
+on:
+  push:
+    branches: [next]
+    # Merging auto PR "chore(nix): refresh lock …" only touches these paths — do not
+    # re-run the full channel (would loop: publish → verify-nix PR → merge → push → publish).
+    paths-ignore:
+      - "flake.lock"
+      - "nix/**"
+  workflow_dispatch:
+  workflow_run:
+    workflows: ["Promote main to next"]
+    types: [completed]
+
+jobs:
+  publish-next:
+    if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
+    uses: ./.github/workflows/reusable-channel-publish.yml
+    with:
+      channel: next
+      # Always build from channel branch; do not tie checkout to workflow_dispatch UI branch.
+      source_ref: next
+      target_branch: next
+      prerelease: true
+      draft_release: true
+      verify_nix: true
+    secrets: inherit

.github/workflows/nix-npm-deps-hash-sync.yml

@@ -0,0 +1,70 @@
+# Keeps `nix/upstream-sources.json` (`npmDepsHash`) in sync with `package-lock.json`.
+# Runs in CI with Nix — contributors do not need Nix locally.
+#
+# Skips fork PRs (cannot push to the contributor branch); after merge to main,
+# next, or release, the push workflow updates the hash on that branch if needed.
+name: Sync Nix npmDepsHash
+
+on:
+  push:
+    branches: [main, next, release]
+    paths:
+      - package-lock.json
+      - package.json
+      - nix/upstream-sources.json
+  pull_request:
+    paths:
+      - package-lock.json
+      - package.json
+      - nix/upstream-sources.json
+  workflow_dispatch:
+
+concurrency:
+  group: nix-npm-hash-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  sync:
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+    # Fork PRs: token cannot push to the fork — merge to main will run the push workflow instead.
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.ref || github.ref }}
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v15
+
+      - name: Recompute npmDepsHash from package-lock.json
+        run: |
+          set -euo pipefail
+          HASH="$(nix run nixpkgs/nixos-unstable#prefetch-npm-deps -- package-lock.json)"
+          echo "Computed npmDepsHash: $HASH"
+          TMP="$(mktemp)"
+          jq --arg h "$HASH" '.npmDepsHash = $h' nix/upstream-sources.json > "$TMP"
+          mv "$TMP" nix/upstream-sources.json
+
+      - name: Commit and push if changed
+        env:
+          PR_HEAD_REF: ${{ github.event.pull_request.head.ref }}
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add nix/upstream-sources.json
+          if git diff --cached --quiet; then
+            echo "npmDepsHash already matches package-lock.json — nothing to commit."
+            exit 0
+          fi
+          git commit -m "chore(nix): sync npmDepsHash with package-lock.json"
+          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+            git push origin "HEAD:${PR_HEAD_REF}"
+          else
+            git push origin "HEAD:${{ github.ref_name }}"
+          fi

.github/workflows/promote-main-to-next.yml

@@ -0,0 +1,66 @@
+name: Promote main to next
+
+on:
+  workflow_dispatch:
+
+jobs:
+  validate-main:
+    uses: ./.github/workflows/validate-main-green-ci.yml
+    with:
+      branch: main
+      required_contexts: ci-ok|ci-main / ci-ok
+
+  promote:
+    needs: validate-main
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: next
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+      - name: fast-forward next to main
+        run: |
+          set -euo pipefail
+          git fetch origin main next
+          # Reset channel branch to main snapshot, then create a fresh RC bump commit.
+          git reset --hard origin/main
+      - name: bump package version to next RC
+        run: |
+          set -euo pipefail
+          git fetch --tags origin
+          CURRENT_VERSION="$(node -p 'require("./package.json").version')"
+          BASE_VERSION="$(node -p 'const v=require("./package.json").version; const m=v.match(/^(\d+\.\d+\.\d+)/); if(!m){throw new Error("Invalid version: "+v)}; m[1]')"
+          MAX_RC="$(git tag -l "app-v${BASE_VERSION}-rc.*" | sed -E 's/.*-rc\.([0-9]+)$/\1/' | sort -n | tail -n1)"
+          if [[ -z "$MAX_RC" ]]; then
+            NEXT_RC=1
+          else
+            NEXT_RC=$((MAX_RC + 1))
+          fi
+          TARGET_VERSION="${BASE_VERSION}-rc.${NEXT_RC}"
+          if [[ "$CURRENT_VERSION" == "$TARGET_VERSION" ]]; then
+            echo "package.json already uses $TARGET_VERSION"
+            exit 0
+          fi
+          npm version --no-git-tag-version "$TARGET_VERSION"
+      - name: sync Tauri version from package.json
+        run: node scripts/sync-tauri-version-from-package.js
+      - name: commit RC version bump
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add package.json package-lock.json src-tauri/Cargo.toml src-tauri/tauri.conf.json
+          if git diff --cached --quiet; then
+            echo "No version bump changes to commit."
+            exit 0
+          fi
+          NEW_VERSION="$(node -p 'require("./package.json").version')"
+          git commit -m "chore(release): bump next channel to ${NEW_VERSION}"
+      - name: push next
+        run: git push --force-with-lease origin HEAD:next

.github/workflows/promote-next-to-release.yml

@@ -0,0 +1,51 @@
+name: Promote next to release
+
+on:
+  workflow_dispatch:
+
+jobs:
+  promote:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: release
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+      - name: fast-forward release to next
+        run: |
+          set -euo pipefail
+          git fetch origin next release
+          # Reset stable channel to next snapshot, then finalize version on top.
+          git reset --hard origin/next
+      - name: finalize package version for release
+        run: |
+          set -euo pipefail
+          CURRENT_VERSION="$(node -p 'require("./package.json").version')"
+          FINAL_VERSION="$(node -p 'const v=require("./package.json").version; const m=v.match(/^(\d+\.\d+\.\d+)/); if(!m){throw new Error("Invalid version: "+v)}; m[1]')"
+          if [[ "$CURRENT_VERSION" == "$FINAL_VERSION" ]]; then
+            echo "package.json is already final: $FINAL_VERSION"
+            exit 0
+          fi
+          npm version --no-git-tag-version "$FINAL_VERSION"
+      - name: sync Tauri version from package.json
+        run: node scripts/sync-tauri-version-from-package.js
+      - name: commit final version bump
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add package.json package-lock.json src-tauri/Cargo.toml src-tauri/tauri.conf.json
+          if git diff --cached --quiet; then
+            echo "No finalization changes to commit."
+            exit 0
+          fi
+          NEW_VERSION="$(node -p 'require("./package.json").version')"
+          git commit -m "chore(release): finalize release version ${NEW_VERSION}"
+      - name: push release
+        run: git push --force-with-lease origin HEAD:release

.github/workflows/release.yml

@@ -1,148 +1,29 @@
-name: Release
+name: Release Channel
+
+# Same GITHUB_TOKEN push limitation as Next Channel (see next.yml).
+#
+# workflow_dispatch: use workflow from `main` for latest publish logic; checkout ref is always `release`.
 on:
   push:
-    tags:
-      - 'v*'
+    branches: [release]
+    # Same nix-refresh loop as next.yml — ignore lock-only merges from verify-nix PRs.
+    paths-ignore:
+      - "flake.lock"
+      - "nix/**"
   workflow_dispatch:
+  workflow_run:
+    workflows: ["Promote next to release"]
+    types: [completed]
 
 jobs:
-  create-release:
-    permissions:
-      contents: write
-    runs-on: ubuntu-latest
-    outputs:
-      release_id: ${{ steps.create-release.outputs.result }}
-      package_version: ${{ steps.get-version.outputs.version }}
-    steps:
-      - uses: actions/checkout@v5
-      - name: setup node
-        uses: actions/setup-node@v5
-        with:
-          node-version: lts/*
-      - name: get version
-        id: get-version
-        run: echo "version=$(node -p "require('./package.json').version")" >> $GITHUB_OUTPUT
-      - name: extract changelog
-        id: changelog
-        run: |
-          VERSION="${{ steps.get-version.outputs.version }}"
-          # Extract the block between ## [VERSION] and the next ## heading
-          BODY=$(awk "/^## \[$VERSION\]/{found=1; next} found && /^## \[/{exit} found{print}" CHANGELOG.md)
-          # Store multiline output
-          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
-          echo "body<<$EOF" >> $GITHUB_OUTPUT
-          echo "$BODY" >> $GITHUB_OUTPUT
-          echo "$EOF" >> $GITHUB_OUTPUT
-      - name: create release
-        id: create-release
-        uses: actions/github-script@v7
-        env:
-          PACKAGE_VERSION: ${{ steps.get-version.outputs.version }}
-          CHANGELOG_BODY: ${{ steps.changelog.outputs.body }}
-        with:
-          script: |
-            const tag = `app-v${process.env.PACKAGE_VERSION}`;
-            const body = process.env.CHANGELOG_BODY || 'See the assets to download this version and install.';
-            try {
-              const { data } = await github.rest.repos.getReleaseByTag({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                tag,
-              });
-              await github.rest.repos.updateRelease({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                release_id: data.id,
-                body,
-              });
-              return data.id;
-            } catch (e) {
-              if (e.status !== 404) throw e;
-            }
-            const { data } = await github.rest.repos.createRelease({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              tag_name: tag,
-              name: `Psysonic v${process.env.PACKAGE_VERSION}`,
-              body,
-              draft: false,
-              prerelease: false
-            });
-            return data.id;
-
-  build-macos-windows:
-    needs: create-release
-    permissions:
-      contents: write
-    strategy:
-      fail-fast: false
-      matrix:
-        settings:
-          - platform: 'macos-latest'
-            args: '--target aarch64-apple-darwin'
-          - platform: 'macos-latest'
-            args: '--target x86_64-apple-darwin'
-          - platform: 'windows-latest'
-            args: ''
-    runs-on: ${{ matrix.settings.platform }}
-    steps:
-      - uses: actions/checkout@v5
-      - name: setup node
-        uses: actions/setup-node@v5
-        with:
-          node-version: lts/*
-      - name: install Rust stable
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: ${{ matrix.settings.platform == 'macos-latest' && 'aarch64-apple-darwin,x86_64-apple-darwin' || '' }}
-      - name: install npm dependencies
-        run: npm install
-      - uses: tauri-apps/tauri-action@v0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          VITE_LASTFM_API_KEY: ${{ secrets.VITE_LASTFM_API_KEY }}
-          VITE_LASTFM_API_SECRET: ${{ secrets.VITE_LASTFM_API_SECRET }}
-        with:
-          releaseId: ${{ needs.create-release.outputs.release_id }}
-          args: ${{ matrix.settings.args }}
-
-  build-linux:
-    needs: create-release
-    permissions:
-      contents: write
-    runs-on: ubuntu-24.04
-    steps:
-      - uses: actions/checkout@v5
-
-      - name: install dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y \
-            libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf \
-            libasound2-dev
-
-      - name: setup node
-        uses: actions/setup-node@v5
-        with:
-          node-version: lts/*
-
-      - name: install Rust stable
-        uses: dtolnay/rust-toolchain@stable
-
-      - name: install npm dependencies
-        run: npm install
-
-      - name: build
-        env:
-          VITE_LASTFM_API_KEY: ${{ secrets.VITE_LASTFM_API_KEY }}
-          VITE_LASTFM_API_SECRET: ${{ secrets.VITE_LASTFM_API_SECRET }}
-        run: npm run tauri:build -- --bundles deb,rpm
-
-      - name: upload Linux artifacts
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          VERSION=${{ needs.create-release.outputs.package_version }}
-          find src-tauri/target/release/bundle \
-            \( -name "*.deb" -o -name "*.rpm" \) \
-            | xargs gh release upload "app-v${VERSION}" --clobber
+  publish-release:
+    if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
+    uses: ./.github/workflows/reusable-channel-publish.yml
+    with:
+      channel: release
+      source_ref: release
+      target_branch: release
+      prerelease: false
+      draft_release: true
+      verify_nix: true
+    secrets: inherit

.github/workflows/reusable-channel-publish.yml

@@ -0,0 +1,433 @@
+name: Reusable Channel Publish
+
+on:
+  workflow_call:
+    inputs:
+      channel:
+        description: "Delivery channel name (release/next)"
+        required: true
+        type: string
+      source_ref:
+        description: "Git ref to build from"
+        required: true
+        type: string
+      target_branch:
+        description: "Branch that receives nix refresh PRs"
+        required: true
+        type: string
+      prerelease:
+        description: "Mark GitHub release as prerelease"
+        required: true
+        type: boolean
+      draft_release:
+        description: "Create release as draft"
+        required: true
+        type: boolean
+      verify_nix:
+        description: "Run verify-nix job"
+        required: false
+        default: true
+        type: boolean
+
+jobs:
+  create-release:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    outputs:
+      release_id: ${{ steps.create-release.outputs.result }}
+      package_version: ${{ steps.get-version.outputs.version }}
+      release_tag: ${{ steps.tag.outputs.value }}
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          ref: ${{ inputs.source_ref }}
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+          cache: "npm"
+      - name: get version
+        id: get-version
+        run: |
+          set -euo pipefail
+          V="$(node -p 'require("./package.json").version')"
+          # Never publish with a missing/non-semver-ish version — empty becomes tag "app-v" on GitHub and breaks manifests.
+          if [ -z "$V" ]; then
+            echo "::error::package.json version is empty"
+            exit 1
+          fi
+          if ! printf '%s' "$V" | grep -qE '^[0-9]+\.[0-9]+\.[0-9]+'; then
+            echo "::error::package.json version must start with semver X.Y.Z... (got '$V')"
+            exit 1
+          fi
+          delim="PKGVER_${GITHUB_RUN_ID}_${GITHUB_RUN_ATTEMPT}_$(openssl rand -hex 8)"
+          {
+            echo "version<<$delim"
+            printf '%s\n' "$V"
+            echo "$delim"
+          } >> "$GITHUB_OUTPUT"
+      - name: compute release tag
+        id: tag
+        env:
+          VERSION: ${{ steps.get-version.outputs.version }}
+        run: |
+          set -euo pipefail
+          if [ -z "${VERSION:-}" ]; then
+            echo "::error::release tag would be 'app-v' (empty version output) — aborting"
+            exit 1
+          fi
+          TAG="app-v${VERSION}"
+          if [ "$TAG" = "app-v" ]; then
+            echo "::error::refuse to create invalid tag 'app-v'"
+            exit 1
+          fi
+          echo "value=$TAG" >> "$GITHUB_OUTPUT"
+      - name: extract changelog
+        id: changelog
+        run: |
+          VERSION="${{ steps.get-version.outputs.version }}"
+          BODY=$(awk "/^## \[$VERSION\]/{found=1; next} found && /^## \[/{exit} found{print}" CHANGELOG.md)
+          if [ -z "$BODY" ]; then
+            BASE_VERSION="$(node -e 'const v=process.argv[1]; const m=v.match(/^(\d+\.\d+\.\d+)/); if(m){process.stdout.write(m[1]);}' "$VERSION")"
+            if [ -n "$BASE_VERSION" ] && [ "$BASE_VERSION" != "$VERSION" ]; then
+              BODY=$(awk "/^## \[$BASE_VERSION\]/{found=1; next} found && /^## \[/{exit} found{print}" CHANGELOG.md)
+            fi
+          fi
+          EOF_MARKER=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
+          echo "body<<$EOF_MARKER" >> "$GITHUB_OUTPUT"
+          echo "$BODY" >> "$GITHUB_OUTPUT"
+          echo "$EOF_MARKER" >> "$GITHUB_OUTPUT"
+      - name: create or update release
+        id: create-release
+        uses: actions/github-script@v7
+        env:
+          PACKAGE_VERSION: ${{ steps.get-version.outputs.version }}
+          RELEASE_TAG: ${{ steps.tag.outputs.value }}
+          CHANGELOG_BODY: ${{ steps.changelog.outputs.body }}
+          IS_PRERELEASE: ${{ inputs.prerelease }}
+          IS_DRAFT: ${{ inputs.draft_release }}
+        with:
+          script: |
+            const tag = process.env.RELEASE_TAG;
+            const body = process.env.CHANGELOG_BODY || "See the assets to download this version and install.";
+            const prerelease = process.env.IS_PRERELEASE === "true";
+            const draft = process.env.IS_DRAFT === "true";
+            const version = process.env.PACKAGE_VERSION;
+            const name = `Psysonic v${version}`;
+            try {
+              const { data } = await github.rest.repos.getReleaseByTag({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                tag,
+              });
+              await github.rest.repos.updateRelease({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                release_id: data.id,
+                body,
+                name,
+                draft,
+                prerelease,
+              });
+              return data.id;
+            } catch (e) {
+              if (e.status !== 404) throw e;
+            }
+            const { data } = await github.rest.repos.createRelease({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag_name: tag,
+              name,
+              body,
+              draft,
+              prerelease,
+            });
+            return data.id;
+
+  build-macos-windows:
+    needs: create-release
+    permissions:
+      contents: write
+    strategy:
+      fail-fast: false
+      matrix:
+        settings:
+          - platform: "macos-latest"
+            args: "--target aarch64-apple-darwin"
+          - platform: "macos-latest"
+            args: "--target x86_64-apple-darwin"
+          - platform: "windows-latest"
+            args: "--bundles nsis"
+    runs-on: ${{ matrix.settings.platform }}
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          ref: ${{ inputs.source_ref }}
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+          cache: "npm"
+      - name: install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.settings.platform == 'macos-latest' && 'aarch64-apple-darwin,x86_64-apple-darwin' || '' }}
+      - name: cache cargo
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+      - name: install npm dependencies
+        run: npm install
+      - name: write Apple API key (macOS only)
+        if: runner.os == 'macOS'
+        run: |
+          mkdir -p ~/private_keys
+          echo "${{ secrets.APPLE_API_KEY_B64 }}" | base64 --decode > ~/private_keys/AuthKey.p8
+          echo "APPLE_API_KEY_PATH=$HOME/private_keys/AuthKey.p8" >> "$GITHUB_ENV"
+      - uses: tauri-apps/tauri-action@v0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VITE_LASTFM_API_KEY: ${{ secrets.VITE_LASTFM_API_KEY }}
+          VITE_LASTFM_API_SECRET: ${{ secrets.VITE_LASTFM_API_SECRET }}
+          APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
+          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
+          APPLE_SIGNING_IDENTITY: ${{ secrets.APPLE_SIGNING_IDENTITY }}
+          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
+          APPLE_API_ISSUER: ${{ secrets.APPLE_API_ISSUER }}
+          APPLE_API_KEY: ${{ secrets.APPLE_API_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
+        with:
+          releaseId: ${{ needs.create-release.outputs.release_id }}
+          args: ${{ matrix.settings.args }}
+      - name: re-sign updater bundle + upload .sig (macOS only)
+        if: runner.os == 'macOS'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
+        run: |
+          set -e
+          RELEASE_TAG="${{ needs.create-release.outputs.release_tag }}"
+          TARGET_ARG='${{ matrix.settings.args }}'
+          if echo "$TARGET_ARG" | grep -q 'aarch64'; then
+            TARGET="aarch64-apple-darwin"
+            ARCH="aarch64"
+          else
+            TARGET="x86_64-apple-darwin"
+            ARCH="x64"
+          fi
+          TARBALL="src-tauri/target/${TARGET}/release/bundle/macos/Psysonic.app.tar.gz"
+          if [ ! -f "$TARBALL" ]; then
+            echo "::error::Expected tarball missing: $TARBALL"
+            ls -la "$(dirname "$TARBALL")" || true
+            exit 1
+          fi
+          npx @tauri-apps/cli signer sign "$TARBALL"
+          cp "${TARBALL}.sig" "Psysonic_${ARCH}.app.tar.gz.sig"
+          gh release upload "$RELEASE_TAG" "Psysonic_${ARCH}.app.tar.gz.sig" --clobber
+
+  generate-manifest:
+    needs: [create-release, build-macos-windows]
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          ref: ${{ inputs.source_ref }}
+      - name: generate latest.json
+        env:
+          VERSION: ${{ needs.create-release.outputs.package_version }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: node scripts/generate-update-manifest.js
+      - name: upload latest.json to release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          RELEASE_TAG="${{ needs.create-release.outputs.release_tag }}"
+          gh release upload "$RELEASE_TAG" latest.json --clobber
+
+  build-linux:
+    needs: create-release
+    permissions:
+      contents: write
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          ref: ${{ inputs.source_ref }}
+      - name: install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf \
+            libasound2-dev squashfs-tools cmake
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+          cache: "npm"
+      - name: install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+      - name: cache cargo
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: src-tauri
+      - name: install npm dependencies
+        run: npm install
+      - name: build
+        env:
+          VITE_LASTFM_API_KEY: ${{ secrets.VITE_LASTFM_API_KEY }}
+          VITE_LASTFM_API_SECRET: ${{ secrets.VITE_LASTFM_API_SECRET }}
+          APPIMAGE_EXTRACT_AND_RUN: 1
+        run: npm run tauri:build -- --bundles deb,rpm,appimage
+      - name: upload Linux artifacts
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          RELEASE_TAG="${{ needs.create-release.outputs.release_tag }}"
+          find src-tauri/target/release/bundle \
+            \( -name "*.deb" -o -name "*.rpm" -o -name "*.AppImage" \) \
+            | xargs gh release upload "$RELEASE_TAG" --clobber
+
+  verify-nix:
+    if: ${{ inputs.verify_nix }}
+    needs: create-release
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: ${{ inputs.target_branch }}
+      - name: install Nix
+        uses: DeterminateSystems/nix-installer-action@v15
+      - name: configure Cachix (managed signing)
+        uses: cachix/cachix-action@v15
+        with:
+          name: psysonic
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+      - name: compute npmDepsHash from package-lock.json
+        id: npm-hash
+        run: |
+          set -euo pipefail
+          HASH="$(nix run nixpkgs/nixos-unstable#prefetch-npm-deps -- package-lock.json)"
+          echo "hash=$HASH" >> "$GITHUB_OUTPUT"
+          echo "Computed npmDepsHash: $HASH"
+      - name: write npmDepsHash into nix/upstream-sources.json
+        run: |
+          set -euo pipefail
+          HASH='${{ steps.npm-hash.outputs.hash }}'
+          jq --arg h "$HASH" '.npmDepsHash = $h' nix/upstream-sources.json > nix/upstream-sources.json.new
+          mv nix/upstream-sources.json.new nix/upstream-sources.json
+      - name: refresh flake.lock (nixpkgs pin)
+        run: nix flake update --accept-flake-config
+      - name: verify nix build + push to Cachix
+        run: |
+          set -euo pipefail
+          nix build .#psysonic --accept-flake-config --no-link --print-build-logs
+          nix path-info --recursive .#psysonic | cachix push psysonic
+      - name: open + auto-merge PR with refreshed lock and hash (if changed)
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add flake.lock nix/upstream-sources.json
+          if git diff --cached --quiet; then
+            echo "flake.lock / nix/upstream-sources.json unchanged — nothing to commit."
+            exit 0
+          fi
+          VERSION="${{ needs.create-release.outputs.package_version }}"
+          BRANCH="chore/nix-lock-refresh-${{ inputs.target_branch }}-v${VERSION}"
+          git checkout -b "$BRANCH"
+          git commit -m "chore(nix): refresh lock + npmDepsHash for v${VERSION}"
+          git push origin "$BRANCH"
+          gh pr create \
+            --base "${{ inputs.target_branch }}" \
+            --head "$BRANCH" \
+            --title "chore(nix): refresh lock + npmDepsHash for v${VERSION}" \
+            --body "Auto-generated for the \`${{ inputs.channel }}\` channel after v${VERSION}: refreshes \`flake.lock\` and \`nix/upstream-sources.json\`."
+
+  bump-main-to-next-dev:
+    if: ${{ inputs.channel == 'release' }}
+    needs: create-release
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+          ref: main
+      - name: setup node
+        uses: actions/setup-node@v5
+        with:
+          node-version: lts/*
+      - name: compute next dev version
+        id: next-dev
+        env:
+          RELEASE_VERSION: ${{ needs.create-release.outputs.package_version }}
+        run: |
+          set -euo pipefail
+          NEXT_DEV="$(node -e 'const v=process.env.RELEASE_VERSION; const m=v.match(/^(\d+)\.(\d+)\.(\d+)/); if(!m){throw new Error(`Invalid release version: ${v}`)}; const major=Number(m[1]); const minor=Number(m[2]) + 1; process.stdout.write(`${major}.${minor}.0-dev`)')"
+          echo "value=$NEXT_DEV" >> "$GITHUB_OUTPUT"
+      - name: bump package version in main
+        run: |
+          set -euo pipefail
+          TARGET_VERSION="${{ steps.next-dev.outputs.value }}"
+          CURRENT_VERSION="$(node -p 'require("./package.json").version')"
+          SHOULD_BUMP="$(node -e '
+            const parse = (v) => {
+              const m = v.match(/^(\d+)\.(\d+)\.(\d+)(?:-(.+))?$/);
+              if (!m) throw new Error(`Invalid semver: ${v}`);
+              const pre = m[4] ?? "";
+              const preRank = pre === "" ? 3 : pre.startsWith("rc.") ? 2 : pre === "dev" ? 1 : 0;
+              return { major: Number(m[1]), minor: Number(m[2]), patch: Number(m[3]), preRank };
+            };
+            const a = parse(process.argv[1]); // current
+            const b = parse(process.argv[2]); // target
+            const keys = ["major", "minor", "patch", "preRank"];
+            for (const k of keys) {
+              if (b[k] > a[k]) { process.stdout.write("true"); process.exit(0); }
+              if (b[k] < a[k]) { process.stdout.write("false"); process.exit(0); }
+            }
+            process.stdout.write("false");
+          ' "$CURRENT_VERSION" "$TARGET_VERSION")"
+          if [[ "$SHOULD_BUMP" != "true" ]]; then
+            echo "main already at ${CURRENT_VERSION} (target ${TARGET_VERSION} is not newer)"
+            exit 0
+          fi
+          npm version --no-git-tag-version "$TARGET_VERSION"
+      - name: sync Tauri version from package.json
+        run: node scripts/sync-tauri-version-from-package.js
+      - name: open PR with dev bump (if changed)
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add package.json package-lock.json src-tauri/Cargo.toml src-tauri/tauri.conf.json
+          if git diff --cached --quiet; then
+            echo "No dev version bump required."
+            exit 0
+          fi
+          VERSION="${{ steps.next-dev.outputs.value }}"
+          SAFE_VERSION="${VERSION//./-}"
+          SAFE_VERSION="${SAFE_VERSION//\//-}"
+          BRANCH="chore/version-bump-main-${SAFE_VERSION}"
+          git checkout -b "$BRANCH"
+          git commit -m "chore(release): bump main to ${VERSION}"
+          git push origin "$BRANCH"
+          gh pr create \
+            --base main \
+            --head "$BRANCH" \
+            --title "chore(release): bump main to ${VERSION}" \
+            --body "Auto-generated after stable release: updates \`package.json\`, \`package-lock.json\`, \`src-tauri/Cargo.toml\`, and \`src-tauri/tauri.conf.json\` to the next development version."

.github/workflows/validate-main-green-ci.yml

@@ -0,0 +1,116 @@
+name: Validate Main Green CI
+
+on:
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: "Branch to validate"
+        required: false
+        default: main
+        type: string
+      required_contexts:
+        description: "Comma-separated required checks; use | for alternatives (e.g. ci-ok|ci-main / ci-ok)"
+        required: false
+        default: ci-ok|ci-main / ci-ok
+        type: string
+  workflow_call:
+    inputs:
+      branch:
+        required: false
+        default: main
+        type: string
+      required_contexts:
+        required: false
+        default: ci-ok|ci-main / ci-ok
+        type: string
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      checks: read
+    steps:
+      - name: validate required checks
+        uses: actions/github-script@v7
+        env:
+          TARGET_BRANCH: ${{ inputs.branch || github.event.inputs.branch || 'main' }}
+          REQUIRED_CONTEXTS: ${{ inputs.required_contexts || github.event.inputs.required_contexts || 'ci-ok|ci-main / ci-ok' }}
+        with:
+          script: |
+            const owner = context.repo.owner;
+            const repo = context.repo.repo;
+            const branch = process.env.TARGET_BRANCH || "main";
+            const groups = String(process.env.REQUIRED_CONTEXTS || "")
+              .split(",")
+              .map((s) => s.trim())
+              .filter(Boolean)
+              .map((group) =>
+                group
+                  .split("|")
+                  .map((s) => s.trim())
+                  .filter(Boolean)
+              );
+
+            const runId = String(context.runId);
+            const branchResp = await github.rest.repos.getBranch({ owner, repo, branch });
+            const sha = branchResp.data.commit.sha;
+            core.info(`Validating checks for ${branch} @ ${sha}`);
+
+            const checksAll = await github.paginate(github.rest.checks.listForRef, {
+              owner,
+              repo,
+              ref: sha,
+              per_page: 100,
+            });
+            const checks = checksAll.filter((c) => !(c.details_url || "").includes(`/actions/runs/${runId}/`));
+
+            const newestByName = new Map();
+            for (const c of checks) {
+              const key = c.name;
+              const prev = newestByName.get(key);
+              if (!prev) {
+                newestByName.set(key, c);
+                continue;
+              }
+              const prevTime = Date.parse(prev.started_at || prev.completed_at || "") || 0;
+              const curTime = Date.parse(c.started_at || c.completed_at || "") || 0;
+              if (curTime >= prevTime) {
+                newestByName.set(key, c);
+              }
+            }
+
+            const failures = [];
+            for (const alternatives of groups) {
+              let ok = false;
+              const altNotes = [];
+              for (const name of alternatives) {
+                const latest = newestByName.get(name);
+                if (!latest) {
+                  altNotes.push(`${name}: missing`);
+                  continue;
+                }
+                if (latest.status !== "completed") {
+                  altNotes.push(`${name}: status=${latest.status}, conclusion=${latest.conclusion}`);
+                  continue;
+                }
+                if (["success", "neutral", "skipped"].includes(latest.conclusion || "")) {
+                  ok = true;
+                  break;
+                }
+                altNotes.push(`${name}: conclusion=${latest.conclusion}`);
+              }
+              if (!ok) {
+                failures.push(`(${alternatives.join(" | ")}): none green — ${altNotes.join("; ")}`);
+              }
+            }
+
+            if (failures.length > 0) {
+              core.setFailed(`Required checks for ${branch} are not green:\n${failures.join("\n")}`);
+              return;
+            }
+
+            const summary = groups
+              .map((alts) => (alts.length > 1 ? `(${alts.join(" | ")})` : alts[0]))
+              .join(", ");
+            core.info(`All required checks for ${branch} are green (${summary}).`);

.gitignore

@@ -31,6 +31,7 @@ dist-ssr
 
 # Tauri
 src-tauri/target/
+src-tauri/gen/
 
 # Documentation
 CLAUDE.md
@@ -40,3 +41,10 @@ memory/
 
 # Local scratchpad / notes (not committed)
 tmp/
+
+# Third-party clones for local research (not committed)
+research/
+
+# Nix build output symlink
+result
+result-*

CLAUDE.md

@@ -1,249 +0,0 @@
-# CLAUDE.md
-
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
-
-## What is Psysonic
-
-A desktop music player (Tauri v2 + React 18 + TypeScript) for Subsonic API-compatible servers (Navidrome, Gonic, etc.). UI is styled after the Catppuccin aesthetic with glassmorphism effects.
-
-## Commands
-
-```bash
-# Dev mode (Linux — uses X11 backend to avoid WebKit compositing issues)
-npm run tauri:dev
-# Equivalent to: GDK_BACKEND=x11 WEBKIT_DISABLE_COMPOSITING_MODE=1 tauri dev
-
-# Production build
-npm run tauri:build
-
-# Frontend-only dev server (no Tauri shell)
-npm run dev
-
-# Type-check + bundle frontend
-npm run build
-```
-
-There are no test scripts. TypeScript compilation (`tsc`) is part of the build.
-
-## Architecture
-
-### Stack
-- **Frontend**: React 18 + TypeScript + Vite, served inside a Tauri WebView
-- **Backend**: Rust (Tauri v2) — handles tray icon, media key shortcuts, `exit_app` command, and the full audio engine
-- **State**: Zustand stores (no Redux)
-- **Audio**: Rust/rodio engine (`src-tauri/src/audio.rs`) — downloads track bytes via reqwest, decodes with symphonia, plays via rodio. Replaces Howler.js. See detailed notes in the Notes section.
-- **API**: All server communication goes through `src/api/subsonic.ts` — a thin wrapper around axios using Subsonic token auth (MD5 hash of password + salt)
-- **Last.fm**: `src/api/lastfm.ts` — direct Last.fm API integration (scrobbling, Now Playing, love/unlove, similar artists, top stats, recent tracks). API key + secret from `VITE_LASTFM_API_KEY` / `VITE_LASTFM_API_SECRET` env vars (bundled at build time).
-- **i18n**: react-i18next, all translations inline in `src/i18n.ts` (English, German, French, Dutch)
-
-### Key files
-
-| File | Role |
-|---|---|
-| `src/api/subsonic.ts` | All Subsonic REST calls + `buildStreamUrl` / `buildCoverArtUrl` / `buildDownloadUrl` helpers. Also exports `pingWithCredentials()`, `coverArtCacheKey()`, `reportNowPlaying()`. `getRandomSongs` includes a `_t` timestamp param to prevent browser/axios caching. |
-| `src/api/lastfm.ts` | Last.fm API: scrobble, updateNowPlaying, love/unlove, getTrackLoved, getSimilarArtists, getTopArtists/Albums/Tracks, getRecentTracks, getUserInfo. Auth via session key stored in `authStore`. |
-| `src/utils/imageCache.ts` | IndexedDB image cache (30-day TTL) + in-memory object URL Map. `getCachedUrl(fetchUrl, cacheKey)` is the main entry point. Capped at 150 entries with LRU eviction + `URL.revokeObjectURL`. Max 5 concurrent fetches. |
-| `src/components/CachedImage.tsx` | Drop-in `<img>` replacement that resolves via the image cache. Also exports `useCachedUrl(fetchUrl, cacheKey)` hook for CSS background-image use cases. Uses cancellation flag to prevent setState on unmounted components. |
-| `src/components/TooltipPortal.tsx` | Global tooltip system. Listens for `mouseover`/`mouseout` on `document`, reads `data-tooltip` / `data-tooltip-pos` / `data-tooltip-wrap` attributes, renders via `createPortal` to `document.body` at `z-index: 99999`. Mounted once in `App.tsx`. Use `data-tooltip` instead of native `title=` everywhere — `title=` produces unstyled OS tooltips. |
-| `src/components/CustomSelect.tsx` | Styled portal-based dropdown replacing native `<select>`. Accepts `SelectOption[]` with optional `group` and `disabled`. Positioned via `useLayoutEffect`, flips above trigger if near viewport bottom. Use for all select inputs. |
-| `src/components/LastfmIcon.tsx` | Shared Last.fm SVG logo component. `<LastfmIcon size={16} />`. |
-| `src/store/authStore.ts` | Multi-server support via `ServerProfile[]` + `activeServerId`. `getBaseUrl()` / `getActiveServer()` used by subsonic.ts. Also stores Last.fm session key, username, scrobbling toggle. Persisted via **`localStorage`** (synchronous — do not change to async storage). |
-| `src/store/playerStore.ts` | Playback state, queue, scrobbling at 50% via Last.fm, server queue sync (debounced 1.5s). On `playTrack`: calls `reportNowPlaying` (Navidrome) + `lastfmUpdateNowPlaying` (Last.fm) independently. Persists `currentTrack`, `queue`, `queueIndex`, `currentTime` for cold-start resume. |
-| `src-tauri/src/audio.rs` | Rust audio engine: `audio_play`, `audio_pause`, `audio_resume`, `audio_stop`, `audio_seek`, `audio_set_volume` commands. Emits `audio:playing`, `audio:progress` (100ms), `audio:ended`, `audio:error` events. `MASTER_HEADROOM` (-1 dB) prevents inter-sample clipping at full volume. |
-| `src/store/themeStore.ts` | Theme selection (47 themes across 7 groups), applied as `data-theme` on `<html>` |
-| `src/store/lyricsStore.ts` | Sidebar tab state (`activeTab: 'queue' \| 'lyrics'`). `showLyrics()` / `showQueue()` / `setTab()`. Not persisted. |
-| `src/components/LyricsPane.tsx` | Lyrics pane rendered inside QueuePanel when `activeTab === 'lyrics'`. Fetches from LRCLIB, parses LRC, auto-scrolls active line. Only subscribes to `currentTime` when synced lyrics are present. |
-| `src/api/lrclib.ts` | Fetches lyrics from `https://lrclib.net/api/get`. Returns `{ syncedLyrics, plainLyrics }`. `parseLrc()` parses LRC timestamps into sorted `LrcLine[]`. |
-| `src/store/fontStore.ts` | Font selection (10 fonts), applied as `data-font` on `<html>`. Persisted in `psysonic_font`. |
-| `src/store/keybindingsStore.ts` | Configurable keybindings — maps `KeyAction` to `e.code` strings. Persisted in `psysonic_keybindings`. |
-| `src/utils/playAlbum.ts` | `playAlbum(albumId)` — fetches album, fades out current track (700 ms), restores volume in store only (no Rust invoke), calls `playTrack`. Used by `AlbumCard` and `Hero` play buttons. |
-| `src-tauri/src/lib.rs` | Tray menu, media key global shortcuts (disabled on Linux), `exit_app` command |
-| `src/App.tsx` | Root routing, `RequireAuth` guard, `TauriEventBridge` (media keys → store actions), `<TooltipPortal />` mount |
-| `src/i18n.ts` | All translations (en + de + fr + nl) inline. Language persisted in `localStorage('psysonic_language')`. |
-| `src/components/Sidebar.tsx` | Sidebar nav + `UpdateToast` component. On mount (1.5s delay) fetches `https://api.github.com/repos/Psychotoxical/psysonic/releases/latest`, compares `tag_name` against `version` imported directly from `package.json` (build-time constant — more reliable than `getVersion()` from Tauri API), and shows a toast above Statistics only when a newer version exists. Silently no-ops if offline. |
-| `src/components/AlbumHeader.tsx` | Extracted from AlbumDetail — cover art, album info, play/enqueue buttons, bio modal, download. |
-| `src/components/AlbumTrackList.tsx` | Extracted from AlbumDetail — tracklist with star ratings, codec labels, VA artist column, context menu. |
-| `src/components/QueuePanel.tsx` | Queue sidebar. Toolbar with round buttons (Shuffle, Save, Load, Clear, Gapless ∞, Crossfade ≋). **Gapless and Crossfade are mutually exclusive** — enabling one disables the other in both the toolbar and Settings. Header shows title + count + duration inline. Crossfade popover (range slider 1–10 s) anchored below the ≋ button. Tech info (codec/bitrate) as frosted-glass overlay on cover art. Items get `.context-active` class while their context menu is open. |
-| `src/components/CoverLightbox.tsx` | Full-screen image lightbox. Props: `{ src, alt, onClose }`. ESC key + overlay click to close. Used in `AlbumHeader` and `ArtistDetail`. |
-| `packages/aur/PKGBUILD` | AUR package definition for Arch/CachyOS. Installs a wrapper script at `/usr/bin/psysonic` that sets `GDK_BACKEND=x11`, `WEBKIT_DISABLE_COMPOSITING_MODE=1`, `WEBKIT_DISABLE_DMABUF_RENDERER=1` before launching the binary. |
-
-### Multi-server support
-`authStore` holds a `ServerProfile[]` array and an `activeServerId`. The `ServerProfile` shape is:
-```typescript
-interface ServerProfile {
-  id: string;
-  name: string;
-  url: string;
-  username: string;
-  password: string;
-}
-```
-Use `getActiveServer()` to get the current server, `getBaseUrl()` to get its URL.
-
-### Login / connection flow
-- Connection is tested with `pingWithCredentials(url, username, password)` from `src/api/subsonic.ts` **before** writing anything to the store.
-- Only after a successful ping: `addServer()` + `setActiveServer()` + `setLoggedIn(true)`.
-- `RequireAuth` in `App.tsx` redirects to `/login` if `!isLoggedIn || !activeServerId || servers.length === 0`.
-- **Do not** call `addServer()` before verifying the connection — this avoids a rehydration race condition with Zustand's async storage.
-
-### Auth salt security
-`secureRandomSalt()` in `subsonic.ts` uses `crypto.getRandomValues()` (not `Math.random()`) for all token auth salts.
-
-### Image caching
-`buildCoverArtUrl()` generates a new ephemeral URL on every call (new salt) — the browser cache is useless. All cover art and artist images are cached via:
-- `coverArtCacheKey(id, size)` — stable key: `${serverId}:cover:${id}:${size}`
-- `CachedImage` component or `useCachedUrl` hook — resolve via IndexedDB, fall back to direct URL
-- Use `useCachedUrl` (not `CachedImage`) for CSS `background-image` properties
-- **Gotcha**: `useCachedUrl` / hooks from `CachedImage.tsx` must be called unconditionally, before any early `return` in the component. Derive inputs from nullable state (e.g. `album?.album.coverArt`) rather than placing the hook after guard returns.
-
-### Data flow
-1. `authStore.getBaseUrl()` returns the active server's URL
-2. `subsonic.ts` calls `useAuthStore.getState()` directly (not hooks) to build each request
-3. `playerStore.playTrack()` calls `invoke('audio_play', { url, volume, durationHint })`, calls `reportNowPlaying` (Navidrome) + `lastfmUpdateNowPlaying` (Last.fm), listens for `audio:progress` / `audio:ended` events, triggers scrobble at 50% directly via Last.fm API, and debounces server queue sync
-4. Tauri events (`media:play-pause`, `tray:play-pause`, etc.) are bridged to store actions in `TauriEventBridge` inside `App.tsx`
-5. On cold start (app restart): if `currentTrack` is in localStorage, `resume()` calls `audio_play` + seeks to saved `currentTime`
-
-### Adding a new page
-1. Create `src/pages/MyPage.tsx`
-2. Add a `<Route>` in `AppShell` in `src/App.tsx`
-3. Add a sidebar link in `src/components/Sidebar.tsx`
-4. Add i18n keys to both `enTranslation` and `deTranslation` in `src/i18n.ts`
-
-### Adding a new Subsonic API call
-Add a function to `src/api/subsonic.ts` using the `api<T>()` helper. The helper automatically injects auth params and unwraps `subsonic-response`.
-
-### Themes
-47 themes across 7 groups, selectable in Settings via `ThemePicker`. `themeStore` persists the choice and sets `data-theme` on `<html>`. All component CSS uses semantic tokens (`--accent`, `--text-primary`, etc.) — only the player button gradient and a few decorative elements reference `--ctp-*` palette vars directly, so every theme must define the full `--ctp-*` set.
-
-`--volume-accent` overrides the volume slider colour independently of `--accent` (used by WnAmp for orange volume, yellow accent elsewhere).
-
-| Theme | Group | Style | Accent |
-|---|---|---|---|
-| `poison` | Psysonic Themes | dark charcoal, phosphor green LCD glow | Green `#1bd655` |
-| `nucleo` | Psysonic Themes | warm brass/cream light | Brass `#7a5218` |
-| `psychowave` | Psysonic Themes | deep violet synthwave | Purple `#a06ae0` |
-| `vintage-tube-radio` | Psysonic Themes | warm brown, VFD orange | Orange `#FF6F00` |
-| `neon-drift` | Psysonic Themes | midnight blue, electric cyan glow | Cyan `#00f2ff` |
-| `wnamp` | Psysonic — Mediaplayer | cool gray-blue dark, LCD glow, Courier New | Yellow `#d4cc46`, volume `#de9b35` |
-| `navy-jukebox` | Psysonic — Mediaplayer | silver/blue light | Blue `#0070a0` |
-| `cobalt-media` | Psysonic — Mediaplayer | cobalt blue dark | Lime `#45ff00` |
-| `onyx-cinema` | Psysonic — Mediaplayer | near-black cinematic | Cyan `#00aaff` |
-| `spotless` | Psysonic — Mediaplayer | flat dark, Spotify-inspired | Green `#1ED760` |
-| `dzr0` | Psysonic — Mediaplayer | flat light, Deezer-inspired | Purple `#A238FF` |
-| `cupertino-beats` | Psysonic — Mediaplayer | Apple Music dark, glassmorphism | Red `#fa243c` |
-| `cupertino-light` | Operating Systems | macOS light, frosted glass | Apple Blue `#0071e3` |
-| `cupertino-dark` | Operating Systems | macOS Space Grey, frosted glass | Vibrant Blue `#007aff` |
-| `aero-glass` | Operating Systems | Win7 Aero glass blue | Blue `#1878e8` |
-| `w98` | Operating Systems | Windows 98 teal desktop | Navy `#000080` |
-| `luna-teal` | Operating Systems | WinXP Luna, green gel buttons | Green `#3c9d29` |
-| `ascalon` | Games | Guild Wars 1 dark stone fantasy | Gold `#d4af37` |
-| `azerothian-gold` | Games | World of Warcraft | Gold `#c19e67` |
-| `grand-theft-audio` | Games | GTA night city | Green `#57b05a` |
-| `lambda-17` | Games | Half-Life orange alert | Amber `#ff9d00` |
-| `nightcity-2077` | Games | Cyberpunk 2077 | Neon Yellow `#FCEE0A` |
-| `v-tactical` | Games | Battlefield | Burnt Orange `#ff8a00` |
-| `blade` | Movies | deep black, blood-red | Red `#b30000` |
-| `imperial-sith` | Movies | Star Wars dark side | Red `#e60000` |
-| `middle-earth` | Movies | warm parchment light (LOTR) | Gold `#d4af37` |
-| `morpheus` | Movies | Matrix terminal | Phosphor Green `#00ff41` |
-| `order-of-the-phoenix` | Movies | Harry Potter | Ember Orange `#e63900` |
-| `pandora` | Movies | Avatar bioluminescent | Cyan `#00f2ff` |
-| `stark-hud` | Movies | Iron Man HUD | Cyan `#00f2ff` |
-| `ice-and-fire` | Series | Game of Thrones | Ice Blue `#70a1ff` |
-| `doh-matic` | Series | The Simpsons | Blue `#1F75FE` |
-| `heisenberg` | Series | Breaking Bad | Crystal Blue `#3fe0ff` |
-| `mocha` | Open Source Classics | Catppuccin dark | Mauve |
-| `macchiato` | Open Source Classics | Catppuccin medium-dark | Mauve |
-| `frappe` | Open Source Classics | Catppuccin medium | Mauve |
-| `latte` | Open Source Classics | Catppuccin light | Mauve |
-| `nord` | Open Source Classics | Polar Night dark | Frost `#88c0d0` |
-| `nord-snowstorm` | Open Source Classics | Snow Storm light | Deep-Blue `#5e81ac` |
-| `nord-frost` | Open Source Classics | deep ocean blue | Frost `#88c0d0` |
-| `nord-aurora` | Open Source Classics | Polar Night + aurora | Purple `#b48ead` |
-| `gruvbox-dark-hard` | Open Source Classics | Gruvbox dark hard | Orange `#fe8019` |
-| `gruvbox-dark-medium` | Open Source Classics | Gruvbox dark medium | Orange `#fe8019` |
-| `gruvbox-dark-soft` | Open Source Classics | Gruvbox dark soft | Orange `#fe8019` |
-| `gruvbox-light-hard` | Open Source Classics | Gruvbox light hard | Orange `#af3a03` |
-| `gruvbox-light-medium` | Open Source Classics | Gruvbox light medium | Orange `#af3a03` |
-| `gruvbox-light-soft` | Open Source Classics | Gruvbox light soft | Orange `#af3a03` |
-
-**Light-theme gotcha**: The Hero and Fullscreen Player sit on top of album-art backgrounds with dark overlays. Their text colors are hardcoded white (not `var(--text-primary)`) so they stay readable in light themes (Latte, Nord Snowstorm).
-
-### Artists page — initial avatars
-Artist images are intentionally **not loaded** on the Artists overview page (grid + list view) to avoid slow server disk I/O on large libraries. Instead, each artist gets a colour-coded initial avatar: first letter of the name (skipping leading punctuation/numbers), colour deterministically hashed from the name using Catppuccin palette variables. Artist images are still loaded on the individual ArtistDetail page (cached via IndexedDB). In the grid view, the initial avatar is a **circle** (`border-radius: 50%`, `border: 2px solid` with the accent colour) centred inside the card. Name and album count below are centre-aligned.
-
-### Artist cards
-`ArtistCardLocal` uses the same structure as `AlbumCard`: no padding, full-width square cover via `aspect-ratio: 1`, info below. Both use `flex: 0 0 clamp(140px, 15vw, 180px)` inside `.album-grid` so they stay the same size as album cards.
-
-### NowPlayingDropdown — Live button
-`src/components/NowPlayingDropdown.tsx` polls `getNowPlaying` every 10 seconds in the background. Navidrome keeps stale "now playing" entries for several minutes after playback stops. To fix this: entries belonging to the current user (`ownUsername`) are filtered by the **local `isPlaying` state** from `playerStore` — so the badge disappears instantly when the user pauses or stops, without waiting for the server to clear the entry. Clicking an entry navigates to the album page (`/album/:albumId`) if `stream.albumId` is available.
-
-### i18n
-All non-English strings live exclusively in `src/i18n.ts` — never hardcode translated text in `.tsx` files. Four languages: `en`, `de`, `fr`, `nl`. Translation namespaces: `sidebar`, `home`, `hero`, `search`, `nowPlaying`, `contextMenu`, `albumDetail`, `artistDetail`, `favorites`, `randomMix`, `randomAlbums`, `playlists`, `albums`, `artists`, `statistics`, `login`, `common`, `settings`, `help`, `queue`, `player`.
-
-**German terminology**: "Queue" is always "Warteschlange" in German — never leave "Queue" untranslated in DE strings.
-
-### Tauri capabilities
-Tauri v2 capability configs live in `src-tauri/capabilities/`. Schema is auto-generated into `src-tauri/gen/schemas/`. Modify capabilities there when adding new Tauri plugins or IPC commands.
-
-## Release / CI
-
-Releases are triggered by pushing a `v*` tag. The GitHub Actions workflow (`.github/workflows/release.yml`) builds for macOS (arm64 + x86_64), Linux (Ubuntu 24.04 → deb + rpm), and Windows.
-
-The workflow is split into three jobs: `create-release` (creates the GitHub Release with changelog body from CHANGELOG.md), `build-macos-windows` (macOS + Windows via tauri-action), and `build-linux` (Ubuntu 24.04, manual, builds only deb + rpm via `--bundles deb,rpm`).
-
-**AppImage is no longer built.** The AppImage was fundamentally incompatible with non-Ubuntu distros (Arch, Fedora) due to the bundled WebKitGTK conflicting with the system's Mesa/EGL stack.
-
-**Never force-push or move a tag after publishing.** GitHub caches release tarballs — moving a tag causes the AUR and other package managers to build stale code. Bump the patch version instead.
-
-### Linux distribution channels
-| Distro family | Package |
-|---|---|
-| Ubuntu / Debian | `.deb` from GitHub Releases |
-| Fedora / RHEL | `.rpm` from GitHub Releases |
-| Arch / CachyOS | AUR: `yay -S psysonic` or `paru -S psysonic` |
-
-### AUR package (`packages/aur/PKGBUILD`)
-- Maintained at `aur.archlinux.org/packages/psysonic` (account: Psychotoxical)
-- Builds from source using the system's own WebKitGTK — no bundled libs, no EGL issues
-- Installs a wrapper script at `/usr/bin/psysonic` setting `GDK_BACKEND=x11`, `WEBKIT_DISABLE_COMPOSITING_MODE=1`, `WEBKIT_DISABLE_DMABUF_RENDERER=1`
-- **When releasing**: bump `pkgver` in `packages/aur/PKGBUILD`, copy to `~/aur-psysonic/`, run `makepkg --printsrcinfo > .SRCINFO`, commit and push to AUR remote
-
-## Notes
-- Media key shortcuts (`MediaPlayPause`, etc.) are **not registered on Linux** (see `#[cfg(not(target_os = "linux"))]` in `lib.rs`). Spacebar is the keyboard shortcut for play/pause instead.
-- `playerStore` persists `volume`, `repeatMode`, `currentTrack`, `queue`, `queueIndex`, and `currentTime` to `localStorage` via Zustand `partialize`. The audio engine state is runtime-only (Rust side).
-- Auth data is persisted via **`localStorage`** (synchronous Zustand storage). Do **not** switch to `@tauri-apps/plugin-store` for `authStore` — async storage causes a rehydration race condition where `getActiveServer()` returns `undefined` before state is restored.
-- `tauri.conf.json` CSP is set to `null` — a stricter CSP breaks HTTP requests in WebKitGTK on Linux.
-- App logo: `public/logo.png` (used in login page and elsewhere). All platform icons generated from this via `npx tauri icon public/logo.png`.
-- **Audio engine (Rust/rodio)**: `audio_play` downloads the full track via reqwest, decodes with symphonia/rodio `Decoder`, appends to a `Sink`. A generation counter (`AtomicU64`) cancels in-flight downloads when the user skips. Progress is tracked via atomic sample counter (`CountingSource`) — no wall-clock drift. `audio:ended` fires after ~1 s of consecutive near-end ticks at 100 ms intervals. Tauri IPC parameter names are **camelCase** (`durationHint`, not `duration_hint`) — this is a hard-learned gotcha, do not revert. `MASTER_HEADROOM = 0.891_254` (-1 dB) is applied to all volume calculations to prevent inter-sample clipping from modern 0 dBFS masters + EQ biquad ripple.
-- **Seek**: `playerStore.seek()` debounces by 100 ms, then calls `invoke('audio_seek', { seconds })`. The Rust side calls `sink.try_seek()` first; if that fails (e.g. FLAC without a SEEKTABLE), the seek silently fails — FLAC files without SEEKTABLE are not seekable. `CountingSource::try_seek` only resets the counter if the inner seek actually succeeded (prevents display desync on failure).
-- **Gapless + Crossfade mutual exclusion**: Enabling one auto-disables the other, enforced in both Settings (row opacity/pointer-events + onChange) and QueuePanel toolbar (button onClick). Both features running simultaneously caused a glitch: Crossfade moved the Sink (which had Song 2 gapless-chained) to `fading_out_sink`; after Song 1's fade-out, Song 2 played at full volume from the old Sink.
-- **Cold-start resume**: `resume()` checks `isAudioPaused` flag. If true (warm resume), calls `audio_resume`. If false (cold start after restart), calls `audio_play` with saved URL then `audio_seek` to saved `currentTime`. Position preference: server queue position > 0 → use server; otherwise use localStorage value.
-- **Drag-and-drop**: All drag sources use `dataTransfer.setData('text/plain', ...)` — WebView2 (Windows) does not support custom MIME types like `application/json`. Queue reordering calculates the **drop target index from `e.clientY`** at drop time (iterates `[data-queue-idx]` elements, picks the first whose midpoint is below the cursor). `fromIdx` comes from `dataTransfer` (set in `dragstart`, always reliable). `onDragEnd` clears refs synchronously. All drops are handled by the `<aside>` container — no `onDrop` on individual queue items.
-- **Drag-and-drop cursor (Linux)**: WebKitGTK does not honour `dropEffect` for cursor display — the cursor may show as forbidden or no indicator depending on the compositor (KDE Plasma vs GNOME). DnD works correctly regardless. This is a known WebKitGTK limitation, not fixable from web content.
-- **Fullscreen Player ("Ambient Stage")**: Single centered column — no tracklist. Background uses the artist's `largeImageUrl` from `getArtistInfo()` (falls back to cover art). Ken Burns animation: `inset: -30%`, ±8% translate, 90s cycle. No color orbs (removed — too GPU-intensive). Cover has a slow breathing animation (`cover-breathe` keyframe). Long song titles scroll as a marquee (`MarqueeTitle` component — measures overflow via `getBoundingClientRect` + `ResizeObserver`, animates via CSS custom property `--scroll-amount`). `Track.artistId` is populated from `SubsonicSong.artistId` (Navidrome returns this field) across all 18 track-construction sites.
-- **Sidebar**: Fixed width via CSS `clamp(200px, 15vw, 220px)` — no drag-to-resize. Collapsed state (72px) persisted in `localStorage`. Update notification uses Tauri Shell plugin `open()` to launch the system browser — `<a target="_blank">` does not work inside a Tauri WebView.
-- **Artist page — external links**: Last.fm and Wikipedia buttons open in the system browser via `open()` from `@tauri-apps/plugin-shell`. Button label temporarily changes to "Opened in browser" / "Im Browser geöffnet" for 2.5 s as visual confirmation.
-- **Tracklist columns**: Order is `# | Title | [Artist (VA only)] | Favorite | Rating | Duration | Format`. Format column uses `120px` (NOT `auto` or `1fr`) — `auto` caused misalignment because header and track-row are independent grid containers: "FORMAT" header text is narrower than "MP3 · 320 kbps", so the `fr` title column calculated differently in header vs rows, shifting all subsequent columns. `1fr` fixed alignment but made the format column too wide. Fixed `120px` fits all codec strings (MP3/FLAC/OGG · kbps) and aligns perfectly. Total row uses explicit `grid-column` numbers (not negative indices).
-- **AlbumDetail**: Thin orchestrator (`src/pages/AlbumDetail.tsx`) — state, handlers, `useCachedUrl` hook, renders `AlbumHeader` + `AlbumTrackList` + related albums section. Logic is split into the two extracted components.
-- **Playlists page**: List layout (not card grid) with sort buttons (Name / Tracks / Duration, toggle asc/desc) and a filter input. Play icon and delete button appear on row hover.
-- **Statistics page**: Library stat cards (Artists / Albums / Songs), Recently Played, Most Played, Highest Rated. Last.fm section (when configured): top artists/albums/tracks with period filter + recent scrobbles. No genre chart (removed). Data loaded in parallel via `Promise.allSettled`.
-- **Context menu**: `song` and `queue-item` types both have "Go to Album" (`Disc3` icon, shown only when `song.albumId` exists) and "Favorite/Unfavorite" toggle. Context menu type union: `'song' | 'album' | 'artist' | 'queue-item' | 'album-song'`. Starred state is read from `item.starred` (set when the item was loaded) and overridden by `starredOverrides` in `playerStore` (updated immediately on star/unstar so the UI reflects the change without a page reload). `Track` interface includes `starred?: string` — propagated via `songToTrack()` and all inline track-object construction sites.
-- **QueuePanel meta box**: Shows title (no link) → artist (linked to `/artist/:id`) → album (linked to `/album/:id`) → year (if available). Cover art is 90×90 px, top-aligned with codec/bitrate frosted-glass overlay at bottom. Default panel width 340 px. Header: title 16px/700, song count + total duration inline in `--accent` colour.
-- **Queue toolbar**: 6 round buttons (`queue-round-btn`, `border-radius: 50%`) centred in a row. Active state: `background: var(--accent); color: var(--ctp-base)`. Crossfade (≋) button: inactive click → enable + open popover; active click → disable + close. Popover: `position: absolute; top: calc(100% + 10px); right: 0; width: 170px` — right-aligned to prevent viewport overflow. **Gapless and Crossfade are mutually exclusive** — clicking one disables the other.
-- **WaveformSeek hover tooltip**: Hovering over the waveform canvas shows a floating time label (`.player-volume-pct`) above the cursor position, reusing the same CSS class as the volume % label. Rendered in a relative `<div>` wrapper; positioned via `left: ${hoverPct * 100}%`. Hidden when no track is loaded or mouse has left the canvas.
-- **Queue hover**: Queue items use `.context-active` CSS class when their context menu is open, keeping the hover highlight visible.
-- **Random Mix hover**: Row uses `.context-active` CSS class when a context menu is open for that song. `contextMenuSongId` state cleared via `useEffect` when `contextMenu.isOpen` becomes false.
-- **Favorites songs**: Full tracklist layout matching AlbumDetail — `track-row-va` grid with `#`, Title, Artist, Duration columns and a header row. Artist name clickable → artist page. "Add all to queue" button (`btn btn-surface`) next to the section title sends all favorited songs to the queue.
-- **Random Mix — Genre Filter**: `excludeAudiobooks` + `customGenreBlacklist` in `authStore` (persisted). Hardcoded `AUDIOBOOK_GENRES` list in `RandomMix.tsx` and `AUDIOBOOK_GENRES_DISPLAY` in `Settings.tsx` must be kept in sync. Filter checks `song.genre`, `song.title`, and `song.album`. Clickable genre chips in the tracklist let users add genres to the blacklist on the fly.
-- **Random Mix — Super Genre Mix**: 9 super-genres defined in `SUPER_GENRES` constant. Server genres fetched via `getGenres()` on mount; `availableSuperGenres` filters to those with ≥1 keyword match. `loadGenreMix` uses progressive rendering — `setGenreMixSongs` updated after each genre request resolves. Genre list capped at 50 (randomly sampled) so total fetch stays near 50 songs — no over-fetching. `genreMixComplete` state gates the "Play All" button: button stays `btn-surface` with live `n / 50` counter while loading, switches to `btn-primary` only when all songs are ready.
-- **RandomAlbums**: No auto-refresh timer — loads once on mount, manual refresh button only. `loadingRef` guards against concurrent fetches.
-- **Queue shuffle**: `shuffleQueue()` in playerStore keeps current track at index 0, Fisher-Yates shuffles the rest.
-- **Tooltips**: Use `data-tooltip="text"` on any element — never native `title=`. `data-tooltip-pos="top|bottom|left|right"` (default: top). `data-tooltip-wrap` for multi-line. Rendered by `TooltipPortal` in `App.tsx` via `document.body` portal.
-- **Scrobbling**: At 50% playback, `playerStore` calls `lastfmScrobble()` directly. Navidrome is NOT used for scrobbling. Both `reportNowPlaying` (Navidrome) and `lastfmUpdateNowPlaying` (Last.fm) are called on every `playTrack()` — independently, fire-and-forget.
-- **Last.fm API key**: Stored in `.env` as `VITE_LASTFM_API_KEY` / `VITE_LASTFM_API_SECRET`. Bundled into the JS at build time (Vite). Not in git. For desktop apps this is acceptable — Last.fm's own docs acknowledge client-side keys can't be truly hidden.
-- **NowPlayingDropdown refresh**: `spinning` state is separate from `loading` — button is always clickable. Spin lasts min 600 ms via `setTimeout`. Background poll (`loading`) does not block the button.
-- **CoverLightbox**: Shared component (`src/components/CoverLightbox.tsx`). Props: `{ src, alt, onClose }`. ESC + overlay click to close. Used in `AlbumHeader` (album cover) and `ArtistDetail` (artist avatar, wrapped in `.artist-detail-avatar-btn`).
-- **Home page**: Section order: recent → discover → artist discovery (pill-buttons, no images) → starred → mostPlayed. Artist discovery uses `getArtists()` full list + client-side Fisher-Yates shuffle (16 random), rendered as `artist-ext-link` pill-buttons (same as ArtistDetail "Similar Artists") — no image loading, no performance impact.
-- **CoverLightbox + EQ popup**: Both use `createPortal(…, document.body)` to escape `backdrop-filter` CSS containing-block issues on the player bar and other ancestors.
-- **Version**: 1.15.0

ORBIT.md

@@ -0,0 +1,344 @@
+# Psy Orbit
+
+A "listen together" mode built into Psysonic. One participant hosts the music, others tune in and listen in sync. Guests can suggest tracks; the host decides what lands in the queue.
+
+No external servers, no relays, no accounts on yet another platform — Orbit piggybacks entirely on your existing Navidrome instance. Sessions live in regular playlists (with a small JSON blob in the comment field), the clients poll and write to those playlists, and that's it.
+
+---
+
+## Table of contents
+
+- [For users](#for-users)
+  - [Starting a session (host)](#starting-a-session-host)
+  - [Joining (guest)](#joining-guest)
+  - [Suggesting tracks](#suggesting-tracks)
+  - [Approvals](#approvals)
+  - [Shared queue](#shared-queue)
+  - [Session settings](#session-settings)
+  - [Participants](#participants)
+  - [Ending the session](#ending-the-session)
+- [Requirements & limits](#requirements--limits)
+- [How it works (technical)](#how-it-works-technical)
+  - [Design goals](#design-goals)
+  - [Playlists as transport](#playlists-as-transport)
+  - [The host tick](#the-host-tick)
+  - [The guest tick](#the-guest-tick)
+  - [Data flow](#data-flow)
+  - [State shape](#state-shape)
+  - [Cleanup](#cleanup)
+  - [Security & privacy](#security--privacy)
+- [Edge cases handled](#edge-cases-handled)
+- [Code map](#code-map)
+
+---
+
+## For users
+
+### Starting a session (host)
+
+Click **Psy Orbit** in the top bar → **Create a session**. The start modal opens with:
+
+- **Session name** — a random playful name is generated; edit it or reroll with the dice button.
+- **Max guests** — cap on concurrent participants (1–32). You don't count.
+- **Invite link** — ready to copy and share the moment the modal opens. Pre-generated from a fresh session id + the slugified name.
+- **Clear my queue first** — optional. Start with an empty queue (guest suggestions land fresh) vs. keep your current queue and share it with the guests.
+
+Click **Start Orbit**. The session bar appears at the top of the window (session name, participant count, shuffle countdown, settings / share / help / exit buttons). The link is now live — share it.
+
+### Joining (guest)
+
+Two equivalent paths:
+
+1. **Paste anywhere** — copy the invite link the host sent you. Anywhere in Psysonic (not inside a text field), press `Ctrl+V` (`Cmd+V` on macOS). A confirm dialog shows who invited you; click Join.
+2. **Launch popover** — click **Psy Orbit** in the top bar → **Join a session** → paste the link into the field → Join.
+
+Either path performs the same preflight: validates the link, checks the session still exists, handles server switches automatically if the link points at another Navidrome you have an account for. If you have **multiple accounts** on the target server, a small picker asks which one to join as.
+
+### Suggesting tracks
+
+Anywhere a song row appears (album, playlist, favorites, artist top-songs, search results, random mix, advanced search):
+
+- **Double-click** a row → adds just that track.
+- **Right-click → "Add to Orbit session"** — same effect, via context menu.
+- **Single-click** on a row shows a toast hint: "Double-click to add". This is deliberate — a single click normally drops the whole album into your queue, which would spam the shared queue and annoy everyone.
+
+Explicit bulk buttons (**Play All** / **Play Album** / **Play Playlist** / Hero play / Album-card play) ask for a confirmation first inside an active session. On confirm, the tracks are **appended** to the shared queue, never replacing it.
+
+### Approvals
+
+By default, a new session starts with **auto-approve off**. Guest suggestions land in the session's suggestion history but not the actual playback queue — the host decides.
+
+The host sees a prominent **Pending approvals** strip at the top of the queue panel: each pending track with cover, title, artist, and "Suggested by …" line, plus two buttons:
+
+- ✓ Accept — enqueues the track into the host's player queue. Guests see it appear in the shared queue on the next tick.
+- ✕ Decline — drops the suggestion. It stays in the suggestion history for audit but won't show up again in the approval strip.
+
+Auto-approve can be toggled on in the session settings for any session where manual approval isn't needed.
+
+### Shared queue
+
+Both hosts and guests see a strip at the top of the queue panel with the session name and a comma-separated list of all participants (host first). Under that:
+
+- **Host** view: regular queue, with any new guest suggestions injected into random positions inside the upcoming range.
+- **Guest** view: read-only display of the host's upcoming queue (up to 30 tracks at a time) with submitter attribution — "by alice" for host-chosen tracks is omitted; "suggested by alice" is shown for guest suggestions.
+
+When the guest has in-flight suggestions that haven't been merged yet, they appear in a separate **Waiting for host** section above Up next, with a clock icon. Once the host (auto-)approves and merges, they move into the normal list.
+
+### Session settings
+
+Open via the gear icon in the session bar (host only):
+
+- **Auto-approve suggestions** — on/off. Default off.
+- **Automatic reshuffle** — on/off. Periodically Fisher–Yates-shuffles the upcoming queue.
+- **Reshuffle every** — 1 / 5 / 10 / 15 / 30 min preset picker. Disabled when auto-reshuffle is off.
+- **Shuffle now** — one-shot manual shuffle + bumps the next-auto-shuffle timer.
+
+### Participants
+
+Click the participant count in the session bar. Opens a popover:
+
+- Host row at the top with a crown icon.
+- Each connected guest with a user icon, username, and join timestamp.
+- Host-only actions per guest: **Remove** (drops them from the session, can re-join via the invite link) vs. **Ban** (permanently blocked for the lifetime of the session). Both confirm before firing.
+
+Guests see the same list but read-only — no action buttons.
+
+### Ending the session
+
+- **Host clicks X** → confirm dialog → session closes for everyone. Server playlists are deleted automatically.
+- **Guest clicks X** → confirm dialog → just the guest leaves. Session continues for everyone else.
+- **Host goes silent for 5 minutes** (network drop, app crash, laptop lid) → guests auto-leave with a dedicated "Host went silent" modal.
+- **App close / force quit** → next app launch sweeps up any orphaned session playlists you own (`__psyorbit_*` with stale heartbeat).
+
+### The help modal
+
+Every screen with the session bar has a `?` icon between settings and X that opens a 9-section walk-through of everything above, with keyboard navigation (arrow keys between sections, Enter to expand).
+
+---
+
+## Requirements & limits
+
+- **Same Navidrome server.** Everyone — host and all guests — must be logged into the same Navidrome instance. Orbit links encode the server URL, and Psysonic auto-switches on paste if you have an account there.
+- **Separate accounts.** Each participant needs their own Navidrome user. If a host and guest log in as the same user, their outbox playlists collide and suggestions get lost. This is a hard limit of the current design — Orbit identifies participants by username.
+- **Public server address for remote guests.** Guests outside your home network need your server reachable at a public hostname. The start modal warns you if you're currently connected via a LAN address.
+- **Host presence matters.** Guests auto-leave after 5 minutes of no host activity. Shorter reconnects (network blips, phone screen off, whatever) are invisible.
+- **Session size.** State is bounded to ~4 KB per playlist comment. In practice that's plenty for a session name, participants list, and a suggestion history; there's no hard cap on tracks through the actual playback queue.
+
+---
+
+## How it works (technical)
+
+### Design goals
+
+1. **No external infrastructure.** Everything runs on your Navidrome. No relay, no auth server, no persistent state anywhere you don't already own.
+2. **No protocol changes.** Uses Navidrome's existing Subsonic/OpenSubsonic playlist endpoints. If your server can host a normal playlist, it can host an Orbit session.
+3. **Degrade gracefully.** A dropped tick doesn't break a session. Network blips are silent. Missing heartbeats expire cleanly. Crashes clean up on the next launch.
+4. **Host-authoritative.** The host's player is the ground truth; guests mirror. No distributed consensus, no leader election.
+
+### Playlists as transport
+
+Every session creates two kinds of playlists on the server (names are stable and start with `__psyorbit_`):
+
+| Playlist | Who owns it | What's in it |
+|---|---|---|
+| `__psyorbit_<sid>` | host | Canonical session state (4 KB JSON blob) in the playlist **comment**. Track list is always empty. |
+| `__psyorbit_<sid>_from_<user>__` | each participant | Outbox. Comment holds a heartbeat timestamp; the track list holds pending guest suggestions. |
+
+All playlists are marked `public: true` so every participant can read them via the normal Subsonic endpoints (`getPlaylist.view`, `getPlaylists.view`). Psysonic filters `__psyorbit_*` out of its own UI (Playlists page, pickers, context menu), but the Navidrome web client will show them while a session is active.
+
+### The host tick
+
+Fired every 2.5 s from `useOrbitHost`:
+
+1. **Sweep all outboxes.** List every `__psyorbit_<sid>_from_<user>__` playlist. For each one, read the current tracklist (= new suggestions from that guest) and the heartbeat timestamp from the comment.
+2. **Apply snapshots to state.** Rebuild the `participants` array from heartbeat freshness (anyone with a heartbeat < 30 s old is "alive"). Append new suggestions to `state.queue` as `OrbitQueueItem { trackId, addedBy, addedAt }`.
+3. **Clear each swept outbox's tracklist** (heartbeat stays). Single-pass consume — a track the host has seen is the host's problem now, not the outbox's.
+4. **Merge into player queue** (when auto-approve is on, and the suggestion isn't host-authored or already merged). Each merged track gets sprinkled at a random position in the upcoming range so host picks and guest suggestions interleave.
+5. **Maybe shuffle.** If auto-shuffle is on and the interval elapsed, Fisher–Yates-reorder the upcoming play queue + rewrite `state.lastShuffle`.
+6. **Snapshot playback.** Write `isPlaying`, `positionMs`, `positionAt` (wall-clock), `currentTrack`, and a 30-item slice of the upcoming play queue (`playQueue`) into the state blob.
+7. **Write.** Serialise and push to the session playlist's comment via `updatePlaylist.view`.
+
+Host also writes a heartbeat to its own outbox every 10 s so the participants pipeline treats the host symmetrically.
+
+### The guest tick
+
+Fired from `useOrbitGuest` — fast polling (500 ms) until the first successful sync lands, then steady 2.5 s:
+
+1. **Read the session playlist comment** via `getPlaylist.view`. Parse the OrbitState.
+2. **Check for session death:** comment empty → session-ended; `state.ended === true` → session-ended; `state.positionAt` older than 5 min → host-timeout.
+3. **Check kick / remove:** if the local username is in `state.kicked` or has a fresh entry in `state.removed`, transition to the appropriate exit modal.
+4. **Reconcile pending suggestions.** For every trackId the local client has submitted, check if it's appeared in `state.playQueue` or `state.currentTrack`. If so, drop it from the local "pending" list (the UI hides it automatically).
+5. **Auto-sync to host.** Three cases:
+   - Different track at host → load it locally (`playTrack`), seek to `estimateLivePosition(state, now)`, mirror `isPlaying`. Never touches the local player if the guest has locally diverged (paused on their own).
+   - Same track, play/pause flipped at host → mirror only if the guest hasn't locally diverged since the last tick.
+   - First tick after join → mirror unconditionally (initial sync).
+6. **Heartbeat tick** (independent, every 10 s): write `{ ts: Date.now() }` into the guest outbox comment.
+
+### Data flow
+
+```
+Host (per tick)                  Navidrome                       Guest (per tick)
+──────────────────────────────────────────────────────────────────────────────────
+                                                                
+player.currentTrack                                              
++ position                                                       
+    │                                                            
+    ▼                                                            
+snapshotPlayerPatch ──► writeOrbitState ─┐                       
+                                         │                       
+                            ┌─session playlist─┐                 
+                            │ comment = JSON   │ ◄─readOrbitState
+                            └──────────────────┘                 
+                                                    │            
+                                                    ▼            
+                                              parse OrbitState   
+                                                    │            
+                                                    ▼            
+                                              syncToHost:        
+                                              • getSong          
+                                              • playTrack        
+                                              • seek             
+                                              • resume/pause     
+                                                                 
+                                                                 
+Guest suggests track Y                                           
+    ┌────────────────────────────────────────────────────────────┤
+    │                                                            │
+    ▼                                                            │
+                                                    suggestOrbitTrack
+                            ┌──guest outbox──┐                   
+                            │ track list = Y │ ◄─updatePlaylist  
+                            └────────────────┘                   
+                                    │                            
+                                    │                            
+Host: sweepGuestOutboxes ◄──────────┘                            
+    │                                                            
+    ▼                                                            
+applyOutboxSnapshotsToState                                      
+(queue += Y, participants refreshed)                             
+    │                                                            
+    ▼ (if auto-approve)                                          
+mergeNewSuggestionsIntoQueue                                     
+    │                                                            
+    ▼                                                            
+player.enqueueAt ──► playQueue snapshot ──► session playlist ──► Guest reconciles
+                                                                 pending list
+```
+
+### State shape
+
+All relevant types in `src/api/orbit.ts`:
+
+```ts
+interface OrbitState {
+  v: 3;
+  sid: string;                 // 8 hex chars
+  host: string;                // navidrome username
+  name: string;                // human-readable session name
+  started: number;             // ms since epoch
+  maxUsers: number;
+  currentTrack: OrbitQueueItem | null;
+  isPlaying: boolean;
+  positionMs: number;
+  positionAt: number;          // wall-clock ms of the last snapshot
+  queue: OrbitQueueItem[];     // suggestion history
+  playQueue: OrbitQueueItem[]; // 30-item slice of host's upcoming
+  playQueueTotal: number;
+  participants: OrbitParticipant[];
+  kicked: string[];
+  removed: { user: string; at: number }[];
+  lastShuffle: number;
+  settings: {
+    autoApprove: boolean;
+    autoShuffle: boolean;
+    shuffleIntervalMin: 1 | 5 | 10 | 15 | 30;
+  };
+  ended: boolean;
+}
+
+interface OrbitQueueItem {
+  trackId: string;
+  addedBy: string;             // navidrome username
+  addedAt: number;
+}
+```
+
+The state blob is size-bounded to 4 KB (serialised JSON). `serialiseOrbitState` throws `OrbitStateTooLarge` above the budget so callers can trim optional fields and retry.
+
+### Cleanup
+
+Three layers of defense against orphaned playlists:
+
+1. **Explicit exit.** `endOrbitSession` (host) or `leaveOrbitSession` (guest) deletes the participant's own playlists synchronously. The happy path.
+2. **Server-switch teardown.** Switching Navidrome servers tears the current session down first (up to 1.5 s), then switches. Prevents "in session against wrong server" states.
+3. **App-start orphan sweep.** Every app launch runs `cleanupOrphanedOrbitPlaylists`: lists every `__psyorbit_*` playlist the current user owns, parses the heartbeat from the comment, deletes anything with a heartbeat older than 5 minutes (or `ended: true`, or an unparseable comment). The current local session is always protected.
+
+The 5-minute TTL is a conservative compromise: long enough to survive a brief app restart (and a session running on another device of yours), short enough that a dead session doesn't clutter the server indefinitely.
+
+### Security & privacy
+
+- **Authentication.** Uses Navidrome's own user system. Participants are identified by their username; no additional auth layer.
+- **Public playlist visibility.** Session and outbox playlists must be `public: true` so guests can read them. Side effect: they're visible to *any* user on the same Navidrome instance while the session is active. Psysonic's own UI filters them; the Navidrome web client does not.
+- **No external servers.** Orbit is strictly peer-to-peer via the Navidrome instance you already trust. No data leaves your server.
+- **No message signing.** Since everything is owned by authenticated Navidrome users, we rely on the server's own ACLs. A guest can't modify the host's session playlist (different owner), only their own outbox.
+- **Track IDs only.** The state blob references tracks by their Navidrome ID. No filenames, no paths, no stream URLs.
+
+---
+
+## Edge cases handled
+
+- **Host offline < 15 s.** Silent. Guests extrapolate via `estimateLivePosition` (positionMs + elapsed wall-clock).
+- **Host offline 15 s – 5 min.** Guest UI shows a yellow "Host offline" badge next to the session name. Playback continues locally.
+- **Host offline > 5 min.** Guest auto-leaves with a "Host went silent" modal. Cleanup of guest outbox runs on dismissal.
+- **Guest pauses locally.** The guest's local pause survives host track changes — the next-track event won't silently un-pause them. "Catch up" brings them back in sync.
+- **Guest resume in orbit.** Pressing play (player bar, media keys, MPRIS) in an active session is interpreted as "catch up" — loads the host's current track and seeks to the live position, not "resume the locally frozen track".
+- **Bulk "Play All" in-session.** Dialog: "Add 14 tracks to the Orbit queue?" On confirm, appended. On cancel, no-op.
+- **Single-click on song row in-session.** Swallowed; shows "Double-click to add" toast.
+- **Multiple accounts on target server.** Paste flow opens an account picker modal. Keyboard-navigable.
+- **Server switch while in session.** Teardown runs before switch. Any server-resident session playlists get cleaned up by their host's next app-start sweep.
+- **Initial sync race.** The guest's first tick retries on 500 ms cadence until the player state actually matches the host's last-known track (up to 2 s per attempt, then falls through with a best-effort mirror).
+- **`positionAt` stale on join.** Seek fraction is clamped to [0, 0.99] — prevents `audio:ended` from firing at the very start of a join.
+- **Outbox deletion mid-session** (cleanup race): host sees the guest drop out on the next sweep; guest's next heartbeat recreates the outbox if they're still connected.
+- **Session playlist deleted** (cleanup race while the guest's local store says it's still active): guest treats as "ended", shows the exit modal.
+
+---
+
+## Code map
+
+### State and types
+- `src/api/orbit.ts` — `OrbitState`, `OrbitQueueItem`, `OrbitSettings`, serialise/parse helpers, `estimateLivePosition`.
+- `src/store/orbitStore.ts` — local session state: role, phase, session/playlist ids, `pendingSuggestions`, `mergedSuggestionKeys`, `declinedSuggestionKeys`.
+
+### Lifecycle
+- `src/utils/orbit.ts` — `startOrbitSession`, `joinOrbitSession`, `endOrbitSession`, `leaveOrbitSession`, `suggestOrbitTrack`, `approveOrbitSuggestion`, `declineOrbitSuggestion`, `hostEnqueueToOrbit`, `cleanupOrphanedOrbitPlaylists`, `effectiveShuffleIntervalMs`.
+- `src/utils/orbitBulkGuard.ts` — standalone confirm-dialog helper invoked from `playerStore` when `>1` tracks land in the queue while a session is active.
+- `src/utils/switchActiveServer.ts` — wires Orbit teardown into server-switch.
+
+### Hooks
+- `src/hooks/useOrbitHost.ts` — host state tick + outbox sweep + merge pipeline + heartbeat.
+- `src/hooks/useOrbitGuest.ts` — guest state pull + auto-sync + heartbeat + host-timeout detection.
+- `src/hooks/useOrbitSongRowBehavior.ts` — shared double-click-to-add behaviour for song lists.
+
+### UI — session bar and popovers
+- `src/components/OrbitSessionBar.tsx` — topbar strip with name, counts, shuffle timer, settings/share/help/catch-up/exit buttons.
+- `src/components/OrbitSettingsPopover.tsx` — host settings (auto-approve, auto-shuffle, interval, manual shuffle).
+- `src/components/OrbitSharePopover.tsx` — host-only invite-link popover with copy button.
+- `src/components/OrbitParticipantsPopover.tsx` — participant list with kick/ban (host-only actions).
+
+### UI — modals
+- `src/components/OrbitStartModal.tsx` — session creation wizard.
+- `src/components/OrbitJoinModal.tsx` — manual invite-link paste + join.
+- `src/components/OrbitAccountPicker.tsx` — multi-account disambiguation when joining.
+- `src/components/OrbitExitModal.tsx` — session-ended / kicked / removed / host-timeout exit notice.
+- `src/components/OrbitHelpModal.tsx` — 9-section help walk-through (keyboard-navigable).
+- `src/components/OrbitStartTrigger.tsx` — "Psy Orbit" button in the header + launch popover (create / join / help).
+
+### UI — queue views
+- `src/components/OrbitQueueHead.tsx` — shared header strip (session name, participants, host-presence badge).
+- `src/components/OrbitGuestQueue.tsx` — guest-side queue view (current track, pending suggestions, upcoming).
+- `src/components/HostApprovalQueue.tsx` — host-side approval strip with accept/decline.
+
+### Supporting
+- `src/store/confirmModalStore.ts` + `src/components/GlobalConfirmModal.tsx` — promise-based confirm dialog used by the bulk-gate.
+- `src/store/helpModalStore.ts` + `src/components/OrbitHelpModal.tsx` — shared help-modal state.
+- `src/store/orbitAccountPickerStore.ts` + `src/components/OrbitAccountPicker.tsx` — account picker for multi-account server switch.

PRIVACY.md

@@ -0,0 +1,50 @@
+# Privacy Policy
+
+Psysonic is a self-hosted music player. It does not collect telemetry, analytics, or any data on its own. All data stays on your device or travels exclusively between your device and services you explicitly configure.
+
+## Data sent to third-party services
+
+All third-party integrations listed below are **opt-in**. Nothing is sent until you enable the respective feature.
+
+### Your Subsonic / Navidrome server
+Your server URL, username, and password are stored locally in the app's data directory. All playback and library requests go directly to your own server. Psysonic has no access to this data.
+
+### Last.fm
+If you connect a Last.fm account in Settings, Psysonic sends:
+- **Scrobbles** — track title, artist, album, and timestamp when a song reaches 50% playback
+- **Now Playing** — the currently playing track (title, artist, album)
+- **Love / Unlove** — when you mark a track as loved or unloved
+
+All requests go to the [Last.fm API](https://www.last.fm/api). Your Last.fm credentials are stored locally and never leave your device. You can disconnect your account at any time in Settings.
+
+### LRCLIB (Lyrics)
+When lyrics are fetched from LRCLIB, Psysonic sends the track title, artist, album, and duration to [lrclib.net](https://lrclib.net) as a search query. No account is required. This feature can be disabled in Settings → Lyrics.
+
+### YouLyPlus (Lyrics)
+If YouLyPlus mode is selected in Settings → Lyrics, Psysonic sends the track title, artist, album, duration, and ISRC (when available) to a community-operated [lyricsplus](https://github.com/ibratabian17/lyricsplus) backend to fetch word-synced karaoke lyrics. No account is required. Requests are routed through a list of public mirrors; the data they receive is limited to the search query above. This feature is disabled by default.
+
+### NetEase Cloud Music (Lyrics)
+If NetEase is enabled as a lyrics source in Settings → Lyrics, Psysonic sends the track artist and title to the NetEase Cloud Music API (via a Rust-side proxy request) to search for synced lyrics. No account is required. This feature is disabled by default.
+
+### Apple Music / iTunes Search API
+If "Use Apple Music covers for Discord" is enabled in Settings, Psysonic queries the [iTunes Search API](https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/iTuneSearchAPI/) with the current track's artist and album name to find cover art. No Apple account is required. Apple's own privacy policy applies to these requests.
+
+### Discord Rich Presence
+If Discord is running and Rich Presence is not disabled, Psysonic connects to the local Discord client via its IPC socket to display the currently playing track. This data is sent to Discord and subject to [Discord's privacy policy](https://discord.com/privacy). No data is sent if Discord is not installed or not running.
+
+## Data stored locally
+
+The following data is stored exclusively on your device in the app's local storage directory and is never transmitted:
+
+- Server profiles (URL, username, password)
+- Last.fm session key
+- Playback preferences, themes, keybindings, and all other settings
+- Synced device manifests
+
+## No telemetry
+
+Psysonic contains no crash reporting, analytics, usage tracking, or any form of telemetry.
+
+## Open source
+
+Psysonic is fully open source under the [GNU General Public License v3.0](LICENSE). You can verify exactly what data is sent by reading the source code.

README.md

@@ -1,134 +1,196 @@
+# Psysonic
+
 <div align="center">
-  <img src="public/logo-psysonic.png" alt="Psysonic Logo" width="200"/>
-  <h1>Psysonic</h1>
-  <p><strong>A modern, gorgeous, and blazing fast desktop client for Subsonic API compatible music servers (Navidrome, Gonic, etc.).</strong></p>
-  
-  <p>
-    <a href="https://github.com/Psychotoxical/psysonic/releases/latest"><img alt="Latest Release" src="https://img.shields.io/github/v/release/Psychotoxical/psysonic?style=flat-square&color=8839ef"></a>
-    <a href="https://github.com/Psychotoxical/psysonic/blob/main/LICENSE"><img alt="License: GPL v3" src="https://img.shields.io/badge/License-GPLv3-cba6f7?style=flat-square"></a>
-    <a href="https://tauri.app/"><img alt="Built with Tauri" src="https://img.shields.io/badge/Built%20with-Tauri-242938?style=flat-square&logo=tauri"></a>
-    <a href="https://aur.archlinux.org/packages/psysonic"><img alt="AUR" src="https://img.shields.io/aur/version/psysonic?style=flat-square&color=1793d1"></a>
-  </p>
+  <img src="public/psysonic-inapp-logo.svg" alt="Psysonic Logo" width="320"/>
+
+## The Ultimate Desktop Client for Self-Hosted Music Libraries
+
+**Fast. Beautiful. Native. Feature-packed.**
+Built primarily for **Navidrome**. Also compatible with **Gonic**, **Airsonic**, **LMS** and other Subsonic-compatible servers with partial feature support.
+
+<br>
+
+<a href="https://github.com/Psychotoxical/psysonic/releases/latest"><img src="https://img.shields.io/github/v/release/Psychotoxical/psysonic?style=for-the-badge&label=Latest%20Release&color=8b5cf6" alt="Latest Release"></a> <a href="https://github.com/Psychotoxical/psysonic/stargazers"><img src="https://img.shields.io/github/stars/Psychotoxical/psysonic?style=for-the-badge&color=f59e0b" alt="GitHub Stars"></a> <a href="https://github.com/Psychotoxical/psysonic/blob/main/LICENSE"><img src="https://img.shields.io/badge/License-GPLv3-22c55e?style=for-the-badge" alt="License GPLv3"></a> <a href="https://tauri.app/"><img src="https://img.shields.io/badge/Tauri-v2-0f172a?style=for-the-badge&logo=tauri" alt="Tauri v2"></a> <a href="https://discord.gg/AMnDRErm4u"><img src="https://img.shields.io/badge/Discord-Community-5865F2?style=for-the-badge&logo=discord&logoColor=white" alt="Discord Community"></a> <a href="https://t.me/+GLBx1_xeH28xYTJi"><img src="https://img.shields.io/badge/Telegram-Community-26A5E4?style=for-the-badge&logo=telegram&logoColor=white" alt="Telegram Community"></a> <a href="https://aur.archlinux.org/packages/psysonic"><img src="https://img.shields.io/badge/AUR-psysonic-1793d1?style=for-the-badge&logo=arch-linux&logoColor=white" alt="AUR psysonic"></a> <a href="https://aur.archlinux.org/packages/psysonic-bin"><img src="https://img.shields.io/badge/AUR-psysonic--bin-1793d1?style=for-the-badge&logo=arch-linux&logoColor=white" alt="AUR psysonic-bin"></a> <a href="https://psysonic.cachix.org"><img src="https://img.shields.io/badge/Cachix-psysonic.cachix.org-5277C3?style=for-the-badge&logo=nixos&logoColor=white" alt="Cachix"></a>
+
+<br><br>
+
+**No telemetry • Native performance • Massive feature set • Community driven**
+
 </div>
 
 ---
 
-Psysonic is a beautiful desktop music player built completely from the ground up for the modern era. Utilizing **Tauri v2** and **React**, it offers a native-feeling, lightweight, and incredibly fast experience with a stunning UI inspired by the [Catppuccin](https://github.com/catppuccin/catppuccin) and [Nord](https://www.nordtheme.com/) aesthetics.
-
-Designed specifically for users hosting their own music via Navidrome or other Subsonic API servers, Psysonic aims to be the best way to interact with your personal library.
-
-
-![Psysonic Screenshot](public/screenshot.png)
-
-## ✨ Features
-
-- 🎨 **Gorgeous UI**: 47 deeply integrated themes across 7 groups — Open Source Classics (Catppuccin, Nord, Gruvbox), Operating Systems, Games, Movies, Series, Psysonic originals, and Psysonic Mediaplayer — with smooth glassmorphism effects and micro-animations.
-- ⚡ **Blazing Fast**: Built with Rust & Tauri — native audio engine (rodio), minimal RAM usage compared to typical Electron apps.
-- 🌍 **Internationalization (i18n)**: Fully translated into English, German, French, and Dutch.
-- 📻 **Live "Now Playing"**: See what other users on your server are currently listening to in real-time.
-- 🎵 **Last.fm Integration**: Direct scrobbling, Now Playing updates, love/unlove, Similar Artists, and top stats — no Navidrome configuration required.
-- 🎤 **Synchronized Lyrics**: In-sidebar lyrics pane powered by LRCLIB — synced with auto-scroll and line highlighting, plain-text fallback.
-- 💾 **IndexedDB Caching**: Ultra-fast loading times with persistent IndexedDB image caching for cover art and artist images.
-- 📀 **Album Downloads**: Support for downloading entire albums directly to your local machine.
-- 💿 **Album & Artist Views**: Beautiful grid displays and detailed artist pages with related albums and color-coded initial avatars for fast browsing.
-- 〰️ **Waveform Seekbar**: Canvas-based waveform with a blue-to-mauve gradient and glow effect — click or drag anywhere to seek.
-- 🎛️ **Queue Management**: Drag & drop reordering, shuffle, playlist saving/loading, and server-side queue synchronization.
-- ⌨️ **Configurable Keybindings**: Rebind any playback action (play/pause, next, seek, volume…) directly in Settings.
-- 🔤 **Font Picker**: 10 UI fonts to choose from in Settings → Appearance.
-- 🎼 **Random Mix**: Generate a random playlist from your entire library. Filter by keyword or pick a Super Genre (Metal, Rock, Electronic, Jazz…) for a focused mix with progressive loading.
-- 🔄 **Update Notifications**: Built-in update checker (on startup + every 10 minutes) that notifies you when a new version is available on GitHub.
-- 🖥️ **Cross-Platform**: Available natively for Windows, macOS, and Linux (including Wayland support).
-
-## 🗺️ Roadmap
-
-### ✅ Completed
-- [x] Native Rust/rodio audio engine (replaces Howler.js)
-- [x] 10-band graphic EQ with built-in and custom presets
-- [x] Crossfade between tracks
-- [x] Replay Gain (track + album mode)
-- [x] Gapless playback
-- [x] Waveform seekbar
-- [x] Last.fm scrobbling, Now Playing & love/unlove
-- [x] Similar Artists via Last.fm, filtered to library
-- [x] Statistics — Last.fm top charts & recent scrobbles
-- [x] Synchronized lyrics via LRCLIB (in-sidebar, auto-scroll)
-- [x] Multi-server support
-- [x] IndexedDB image caching
-- [x] Random Mix with keyword filter & Super Genre mix
-- [x] 47 themes across 7 groups: Open Source Classics, Operating Systems, Games, Movies, Series, Psysonic originals, Psysonic Mediaplayer
-- [x] Internationalization (English, German, French, Dutch)
-- [x] AUR package (Arch / CachyOS)
-- [x] Configurable keybindings
-- [x] Font picker (10 UI fonts)
-
-### 📋 Planned
-- [ ] General UI polish & visual refinement
-- [ ] More languages
+![Psysonic Screenshot](public/screenshot1.png)
 
 ---
 
-## ● Known Limitations
+> [!WARNING]
+> Psysonic is under heavy active development. Bugs and rough edges are to be expected. We reserve the right to change, remove, or rework existing features at any time without prior notice.
 
-- **Linux (drag & drop cursor feedback)**: Due to a WebKitGTK limitation, the drag cursor does not reflect the drop operation type — it may appear as a "forbidden" symbol or show no indicator at all, depending on the desktop environment. Drag and drop itself works correctly.
-- **FLAC seeking**: Seeking in FLAC files requires an embedded SEEKTABLE metadata block. Files encoded without one cannot be seeked — clicking the waveform has no effect. Most modern encoders include a SEEKTABLE by default. You can add one retroactively with `metaflac --add-seekpoint=10s *.flac`.
+## Server Compatibility
 
-## 📥 Installation
+**Psysonic is optimized first and foremost for Navidrome.**
 
-Navigate to the [Releases](https://github.com/Psychotoxical/psysonic/releases) page and download the installer for your operating system.
+Many advanced functions integrate directly with Navidrome APIs for the best possible experience. Other Subsonic-compatible servers generally work well, but some features may be limited depending on server capabilities.
 
-- **Windows**: `.exe` or `.msi`
-- **macOS**: `.dmg` (Universal or Apple Silicon)
-- **Linux (Ubuntu/Debian)**: `.deb` from GitHub Releases
-- **Linux (Fedora/RHEL)**: `.rpm` from GitHub Releases
-- **Linux (Arch/CachyOS)**: AUR — `yay -S psysonic` or `paru -S psysonic`
+## Why Psysonic?
 
-> The AUR package builds from source using your system's own WebKitGTK — no bundled libs, no EGL/Mesa compatibility issues.
+Most Subsonic clients feel like web wrappers.
 
-## 🚀 Getting Started
+**Psysonic does not.**
 
-1. Download and install Psysonic.
-2. Open the app and enter your Subsonic/Navidrome server details (URL, Username, Password).
-3. If applicable, you can provide both an external URL and a local LAN IP. Psysonic allows you to quickly toggle between them in the Settings.
-4. Enjoy your music!
+It is a true desktop experience built with **Rust**, **Tauri v2**, and **React** for users who care about speed, aesthetics, customization, and serious music library management.
 
-## 🛠️ Development
+If you host your own music, this is what the premium experience should feel like.
 
-If you want to build Psysonic from source or contribute to the project:
+---
 
-### Prerequisites
-- [Node.js](https://nodejs.org/) (v18+)
-- [Rust](https://www.rust-lang.org/) (v1.75+)
-- OS-specific build dependencies for Tauri (see the [Tauri prerequisites guide](https://tauri.app/v2/guides/getting-started/prerequisites)).
+# Core Features
 
-### Setup
+## Playback Engine
+
+* Gapless playback
+* Crossfade
+* ReplayGain support
+* Smart Loudness Normalization
+* Infinite Queue
+* Smart Radio sessions
+* High responsiveness with low memory usage
+
+## Audio Tools
+
+* 10-band Equalizer
+* Presets
+* AutoEQ headphone correction
+* Per-device optimization
+
+## Library Power
+
+* Lightning-fast search
+* Albums / Artists / Tracks / Genres
+* Ratings system
+* Multi-select bulk actions
+* Drag & drop playlist management
+* Huge library friendly
+
+## Lyrics & Discovery
+
+* Synced lyrics with seek support
+* Auto-scroll sidebar lyrics
+* Fullscreen lyric mode
+* Last.fm scrobbling
+* Similar artists / love tracks / stats
+
+## Personalization
+
+* Huge theme collection
+* Catppuccin / Nord inspired styles
+* Glassmorphism effects
+* Font customization
+* Zoom controls
+* Keybind remapping
+* Theme Scheduler (day/night auto switch)
+
+## Power User Extras
+
+* CLI controls
+* USB / portable sync
+* Backup & restore settings
+* In-app auto updater
+* LAN / remote auto switching
+
+---
+
+# Orbit (Upcoming)
+
+## Listen Together. In Sync. Soon.
+
+Currently in final development and testing. Orbit will introduce synchronized shared listening sessions directly inside Psysonic.
+
+* Host-controlled playback
+* Join via link
+* Shared listening sessions
+* Guest song suggestions
+* Real-time queue interaction
+
+**Rolling out in an upcoming release. Community feedback will help shape the final experience.**
+
+---
+
+# Platforms
+
+| OS      | Support                                                         |
+| ------- | --------------------------------------------------------------- |
+| Windows | Native Installer *(certificate pending)*                        |
+| macOS   | Signed DMG                                                      |
+| Linux   | AppImage / DEB / RPM / AUR (`psysonic`, `psysonic-bin`) / NixOS |
+
+Supports **8 languages** and growing.
+
+---
+
+# Install
+
+## Linux
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/Psychotoxical/psysonic/main/scripts/install.sh | sudo bash
+```
+
+## Windows
+
+Download the latest installer from Releases.
+
+> SmartScreen warnings may appear until the code-signing certificate is active.
+
+## macOS
+
+Download the signed DMG from Releases.
+
+---
+
+# Development
 
 ```bash
-# Clone the repository
 git clone https://github.com/Psychotoxical/psysonic.git
 cd psysonic
-
-# Install node dependencies
 npm install
-
-# Run in development mode
 npm run tauri:dev
+```
 
-# Build for production
+Build release:
+
+```bash
 npm run tauri:build
 ```
 
-## 🤝 Contributing
+---
 
-Contributions are completely welcome! Whether it is translating the app into a new language, fixing a bug, or proposing a new feature.
+# Privacy First
 
-1. Fork the Project
-2. Create your Feature Branch (`git checkout -b feature/AmazingFeature`)
-3. Commit your Changes (`git commit -m 'Add some AmazingFeature'`)
-4. Push to the Branch (`git push origin feature/AmazingFeature`)
-5. Open a Pull Request
+* No telemetry
+* No spyware nonsense
+* No analytics harvesting
+* Your library stays yours
 
-## 📄 License
+---
 
-Distributed under the **GNU General Public License v3.0**. See `LICENSE` for more information.
+# Community
 
-This means: you are free to use, study, and modify Psysonic. If you distribute a modified version, you must release it under the same GPL v3 license and keep the original copyright notice intact. You may **not** incorporate this code into proprietary software.
+Join Discord, report bugs, suggest features, share themes, shape the future.
+
+---
+
+# License
+
+GNU GPL v3.0
+
+---
+
+<div align="center">
+
+## Stop using boring music clients.
+
+## Use Psysonic.
+
+</div>

RELEASE_PROCESS.md

@@ -0,0 +1,237 @@
+# Release Process (Strict SOP)
+
+This document defines the **only allowed** release workflow for this repository.
+All maintainers should follow it exactly.
+
+## 1) Branch roles
+
+- `main`:
+  - primary development branch
+  - all regular feature/fix work lands here via PR
+  - should usually carry a development version (for example `X.Y.Z-dev`)
+- `next`:
+  - release-candidate (RC) stabilization branch
+  - receives promoted changes from `main`
+  - receives RC-only fixes during freeze
+- `release`:
+  - stable release branch
+  - only receives promoted commits from `next`
+
+Direct push to these branches is not part of normal human workflow. Use PRs and promotion workflows.
+
+## 2) Versioning rules (mandatory)
+
+Version is authoritative in `package.json` and `package-lock.json`.
+
+- `main` version format: `X.Y.Z-dev`
+- `next` version format: `X.Y.Z-rc.N`
+- `release` version format: `X.Y.Z`
+
+Rules:
+
+1. Never edit versions manually in random commits.
+2. Version transitions must happen through the defined promotion workflows.
+3. Tags must match package version:
+   - RC: `app-vX.Y.Z-rc.N`
+   - Stable: `app-vX.Y.Z`
+
+## 3) Standard release flow
+
+### Step A: Prepare in `main`
+
+1. Merge ready PRs into `main`.
+2. Confirm CI is green on `main`.
+
+### Step B: Promote to RC (`next`)
+
+1. Run workflow: **Promote main to next**.
+2. Workflow behavior:
+   - validates required `main` checks before promotion (default: `ci-ok`, or UI-style `ci-main / ci-ok`; either satisfies the gate)
+   - resets `next` to `main` snapshot
+   - auto-bump package version in `next` to next `-rc.N`
+   - commit and push version bump
+3. Push on `next` triggers **Next Channel** workflow:
+   - build/publish RC artifacts for all platforms
+   - run Nix verification path
+
+### Step C: Stabilize RC
+
+1. Test RC artifacts.
+2. If fixes are needed, follow Section 5 (RC fix policy).
+3. Repeat Step B as needed until release candidate is accepted.
+
+### Step D: Promote to stable (`release`)
+
+1. Run workflow: **Promote next to release**.
+2. Workflow behavior:
+   - resets `release` to `next` snapshot
+   - finalize version from `-rc.N` to `X.Y.Z`
+   - commit and push finalized version
+3. Push on `release` triggers **Release Channel** workflow:
+   - stable artifact publish
+   - Nix verification
+   - opens PR to bump `main` to next minor `-dev`
+
+### Step E: Move `main` forward
+
+1. Merge the auto-generated PR that bumps `main` to next minor dev version.
+2. Confirm `main` now uses `X.(Y+1).0-dev`.
+3. Update AUR package metadata for the same stable version:
+   - bump `pkgver` in `packages/aur/PKGBUILD`
+   - regenerate `packages/aur/.SRCINFO`
+   - publish/update in AUR remote
+
+## 4) Freeze policy (RC stabilization window)
+
+When RC freeze starts:
+
+- Do **not** run `Promote main to next` automatically or casually.
+- Only approved release manager(s) may run promotion workflows.
+- `next` accepts only stabilization changes (fixes/docs/chore required for release quality).
+- New features remain in `main` and wait for next cycle.
+
+Freeze ends after `next -> release` promotion is complete.
+
+## 5) RC fix policy (strict backport/forward-port rules)
+
+If a bug is discovered during RC stabilization:
+
+1. Create dedicated fix branch from `next`:
+   - example: `fix/rc-crash-login`
+2. Open PR: `fix/rc-crash-login -> next`
+3. After merge to `next`, create dedicated backport branch from `main`:
+   - example: `fix/backport-rc-crash-login-main`
+4. Cherry-pick (or re-apply) same fix.
+5. Open PR: `fix/backport-rc-crash-login-main -> main`
+6. Merge this `main` backport PR before the next `Promote main to next` run.
+
+This is mandatory. RC-only fixes may not stay only in `next`.
+
+Alternative allowed order:
+
+- implement first in `main`, then promote `main -> next`.
+
+But if `main` is ahead with non-release features and promotion is frozen, use the `next-first + mandatory main backport` flow above.
+
+## 6) Post-release critical hotfix policy (default path)
+
+After a stable release `X.Y.Z`, critical fixes must be shipped as a patch release:
+
+- next stable target is always `X.Y.(Z+1)`
+- RC tags for hotfix cycle: `app-vX.Y.(Z+1)-rc.N`
+- final stable tag: `app-vX.Y.(Z+1)`
+
+Never re-use or overwrite `X.Y.Z` tags/releases.
+
+### Case A: `next` is not yet used for the next minor
+
+This case is uncommon in this repository but allowed.
+
+1. Create hotfix branch from `release`.
+2. Implement fix and open PR to `release`.
+3. Move patch line through `next` RC flow (`X.Y.(Z+1)-rc.N`).
+4. Promote `next -> release` for final `X.Y.(Z+1)`.
+5. Backport fix to `main` via dedicated PR (mandatory).
+
+### Case B (default): `next` already tracks next minor
+
+This is the expected real-world case.
+
+Assume:
+
+- `release` is `1.9.0`
+- `main`/`next` already moved to `1.10.0-*`
+- critical bug requires `1.9.1`
+
+Required steps:
+
+1. Announce **hotfix override window** and freeze normal next-minor RC flow.
+2. Create hotfix branch from `release` (`1.9.0` baseline).
+3. Implement fix and merge into `release` branch via PR.
+4. Temporarily align `next` to the hotfix patch line for RC publication.
+5. Publish hotfix RC(s): `1.9.1-rc.N`.
+6. Promote `next -> release` to finalize `1.9.1`.
+7. Backport/cherry-pick same fix into `main` via dedicated PR (mandatory).
+8. Restore `next` back to the normal next-minor line from `main`.
+9. Announce end of hotfix override and resume normal RC cycle.
+
+Hard rule: no feature work may be merged into `next` during hotfix override.
+
+## 7) Idempotency and rerun behavior
+
+Manual workflow reruns should be safe:
+
+- rerunning **Promote main to next**:
+  - no change if no new commits
+  - version bump occurs only when needed for next RC number
+- rerunning **Promote next to release**:
+  - no change if release already matches next
+  - no extra version increment beyond `X.Y.Z`
+- rerunning release publish:
+  - main dev bump step should no-op when `main` already has target dev version
+
+Rerun is allowed for recovery, but must be announced in release channel/chat.
+
+## 8) Hard rules and prohibitions
+
+Do:
+
+- use PRs for all code changes
+- keep channel promotions deterministic and force-push only through approved promotion workflows
+- require green CI before promotions
+- document exceptions in PR description
+
+Do not:
+
+- manually retag or overwrite release tags
+- manually edit `package.json` version outside defined release flow
+- merge feature PRs into `next` during freeze
+- skip the `next/release -> main` backport for RC fixes or hotfixes
+- force-push `next` or `release` manually outside promotion workflows
+
+## 9) Incident handling
+
+If an incorrect promotion happened:
+
+1. Stop further promotions immediately.
+2. Announce incident and current branch SHAs.
+3. Create corrective PRs (do not use destructive git history rewrites on protected branches).
+4. Re-run affected workflows only after corrective PRs are merged.
+
+## 10) Operator checklist (quick)
+
+Before `main -> next`:
+
+- [ ] `main` CI green
+- [ ] freeze status known
+- [ ] release manager approval
+- [ ] branch rules allow workflow `--force-with-lease` on `next`
+
+Before `next -> release`:
+
+- [ ] RC validation complete
+- [ ] all RC fixes merged to `next`
+- [ ] corresponding backports to `main` completed or queued with owners
+- [ ] branch rules allow workflow `--force-with-lease` on `release`
+
+After stable release:
+
+- [ ] verify stable artifacts exist
+- [ ] merge auto PR for next `-dev` bump in `main`
+- [ ] publish AUR update (`PKGBUILD` + `.SRCINFO`)
+- [ ] announce cycle close
+
+For post-release hotfix:
+
+- [ ] patch target decided: `X.Y.(Z+1)`
+- [ ] hotfix override for `next` announced
+- [ ] fix merged to release patch line
+- [ ] hotfix backport PR to `main` merged
+- [ ] `next` restored to normal next-minor line
+
+Nix note:
+
+- `nix-npm-deps-hash-sync.yml` runs on pushes to `main`, `next`, and `release`.
+- `verify-nix` in channel publish still performs full lock/hash refresh verification for release artifacts.
+- Channel-local nix refresh PRs are advisory and can be overwritten by later reset-based promotions.
+- If a nix refresh must survive release cycles, ensure the same change is merged into `main`.

completions/README.md

@@ -0,0 +1,36 @@
+# Shell completion for `psysonic`
+
+Covers global flags (`--help`, `--info`, …), `completions …`, and `--player` commands (`next`, `audio-device …`, `library …`, `mix …`, …). Run `psysonic --help` for the full list.
+
+The same scripts are **embedded in the release binary**: run **`psysonic completions`** for install instructions, or **`psysonic completions bash` / `zsh`** to print the scripts (no repo checkout needed).
+
+## zsh
+
+Copy or symlink `_psysonic` into a directory on your `$fpath`, then reload completion:
+
+```sh
+mkdir -p ~/.zsh/completions
+ln -sf /path/to/psysonic/completions/_psysonic ~/.zsh/completions/_psysonic
+fpath=(~/.zsh/completions $fpath)
+autoload -Uz compinit && compinit
+```
+
+If you use a plugin manager, point its `fpath` at this repo’s `completions/` directory instead.
+
+## bash
+
+Source the script once (e.g. in `~/.bashrc`):
+
+```sh
+source /path/to/psysonic/completions/psysonic.bash
+```
+
+Use this only under **bash** (including macOS’s `/bin/bash` 3.2). **zsh** users should install `_psysonic` instead — do not `source` the `.bash` file in zsh.
+
+## Device names after `audio-device set`
+
+Completion can suggest IDs from `psysonic-cli-audio-devices.json` (same paths the app uses: `$XDG_RUNTIME_DIR` or `$TMPDIR`/`/tmp`). That file appears after you run **`psysonic --player audio-device list`** while the app is running. Optional: install **`jq`** for parsing that JSON in the completion scripts.
+
+## Folder ids after `library set`
+
+Same idea with **`psysonic-cli-library.json`**, produced by **`psysonic --player library list`**. Optional **`jq`** for completion of folder ids plus the literal **`all`**.

completions/_psysonic

@@ -0,0 +1,157 @@
+#compdef psysonic
+# Zsh completion for Psysonic CLI (see `psysonic --help`).
+
+_psysonic_audio_device_json() {
+  local f
+  if [[ -n $XDG_RUNTIME_DIR ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-audio-devices.json"
+    [[ -r $f ]] && { print -r -- "$f"; return }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-audio-devices.json"
+  [[ -r $f ]] && print -r -- "$f"
+}
+
+_psysonic_audio_device_ids() {
+  command -v jq &>/dev/null || return
+  local jf
+  jf="$(_psysonic_audio_device_json)" || return
+  local -a devs
+  devs=( ${(@f)"$(jq -r '.devices[]? | select(type == "string")' "$jf" 2>/dev/null)"} )
+  (( $#devs )) && compadd -a devs
+}
+
+_psysonic_library_json() {
+  local f
+  if [[ -n $XDG_RUNTIME_DIR ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-library.json"
+    [[ -r $f ]] && { print -r -- "$f"; return }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-library.json"
+  [[ -r $f ]] && print -r -- "$f"
+}
+
+_psysonic_library_folder_ids() {
+  command -v jq &>/dev/null || return
+  local jf
+  jf="$(_psysonic_library_json)" || return
+  local -a ids
+  ids=( ${(@f)"$(jq -r '.folders[]? | select(.id != null) | .id | tostring' "$jf" 2>/dev/null)"} )
+  (( $#ids )) && compadd -a ids
+}
+
+_psysonic_snapshot_json() {
+  local f
+  if [[ -n $XDG_RUNTIME_DIR ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-snapshot.json"
+    [[ -r $f ]] && { print -r -- "$f"; return }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-snapshot.json"
+  [[ -r $f ]] && print -r -- "$f"
+}
+
+_psysonic_server_ids() {
+  command -v jq &>/dev/null || return
+  local jf
+  jf="$(_psysonic_snapshot_json)" || return
+  local -a ids
+  ids=( ${(@f)"$(jq -r '.servers[]? | select(.id != null) | .id | tostring' "$jf" 2>/dev/null)"} )
+  (( $#ids )) && compadd -a ids
+}
+
+_psysonic_globals() {
+  compadd -J options -X 'option' -- \
+    --help --version --info --json --quiet --logs --player completions
+}
+
+integer i pidx=0
+for (( i = 2; i < CURRENT; i++ )); do
+  [[ ${words[i]} == --player ]] && pidx=i
+done
+
+if [[ ${words[CURRENT-1]} == --tail ]]; then
+  _message -e descriptions 'number of lines'
+  return
+fi
+
+if (( pidx == 0 )); then
+  local has_logs=0
+  for (( i = 2; i < CURRENT; i++ )); do
+    [[ ${words[i]} == --logs ]] && has_logs=1
+  done
+  if (( CURRENT == 3 )) && [[ ${words[2]} == completions ]]; then
+    compadd help bash zsh
+    return
+  fi
+  if (( has_logs )); then
+    compadd -- --tail -f --follow
+  else
+    _psysonic_globals
+  fi
+  return
+fi
+
+local -a sub
+if (( pidx + 1 <= CURRENT - 1 )); then
+  sub=( ${words[pidx + 1,CURRENT - 1]} )
+else
+  sub=()
+fi
+
+integer n=${#sub[@]}
+if (( n == 0 )); then
+  compadd -J verbs -X 'player command' -- \
+    next prev play pause stop seek volume shuffle repeat mute unmute star unstar rating reload \
+    audio-device library server search mix
+  return
+fi
+
+case ${sub[1]} in
+  audio-device)
+    if (( n == 1 )); then
+      compadd list set
+    elif [[ ${sub[2]} == set ]] && (( n == 2 )); then
+      compadd default
+      _psysonic_audio_device_ids
+    fi
+    ;;
+  library)
+    if (( n == 1 )); then
+      compadd list set
+    elif [[ ${sub[2]} == set ]] && (( n == 2 )); then
+      compadd all
+      _psysonic_library_folder_ids
+    fi
+    ;;
+  mix)
+    (( n == 1 )) && compadd append new
+    ;;
+  server)
+    if (( n == 1 )); then
+      compadd list set
+    elif [[ ${sub[2]} == set ]] && (( n == 2 )); then
+      _psysonic_server_ids
+    fi
+    ;;
+  search)
+    if (( n == 1 )); then
+      compadd track album artist
+    elif (( n >= 2 )); then
+      _message -e descriptions 'search query'
+    fi
+    ;;
+  repeat)
+    (( n == 1 )) && compadd off all one
+    ;;
+  rating)
+    (( n == 1 )) && compadd 0 1 2 3 4 5
+    ;;
+  seek)
+    (( n == 1 )) && _message -e descriptions 'integer delta (seconds, e.g. -5)'
+    ;;
+  volume)
+    (( n == 1 )) && _message -e descriptions 'percent 0–100'
+    ;;
+  play)
+    (( n == 1 )) && _message -e descriptions 'Subsonic id (song, album, or artist)'
+    ;;
+esac

completions/psysonic.bash

@@ -0,0 +1,183 @@
+# bash completion for Psysonic (see `psysonic --help`).
+# Install: source /path/to/completions/psysonic.bash
+# Optional: jq + prior `psysonic --player audio-device list` for device name completion.
+#
+# Uses no `mapfile` so bash 3.2 (macOS default) works.
+#
+# compopt is bash-only (programmable completion). Guard so sourcing this file
+# under zsh or plain sh does not print "command not found: compopt".
+
+_psysonic_compopt() {
+  command -v compopt &>/dev/null || return 0
+  compopt "$@" 2>/dev/null || return 0
+}
+
+_psysonic_compreply_from_compgen() {
+  # $1 = compgen -W word list, $2 = current word
+  COMPREPLY=()
+  local line
+  while IFS= read -r line; do
+    [[ -n $line ]] && COMPREPLY+=("$line")
+  done < <(compgen -W "$1" -- "$2")
+}
+
+_psysonic_audio_device_json() {
+  local f
+  if [[ -n ${XDG_RUNTIME_DIR:-} ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-audio-devices.json"
+    [[ -r $f ]] && { printf '%s' "$f"; return; }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-audio-devices.json"
+  [[ -r $f ]] && printf '%s' "$f"
+}
+
+_psysonic_library_json() {
+  local f
+  if [[ -n ${XDG_RUNTIME_DIR:-} ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-library.json"
+    [[ -r $f ]] && { printf '%s' "$f"; return; }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-library.json"
+  [[ -r $f ]] && printf '%s' "$f"
+}
+
+_psysonic_snapshot_json() {
+  local f
+  if [[ -n ${XDG_RUNTIME_DIR:-} ]]; then
+    f="$XDG_RUNTIME_DIR/psysonic-cli-snapshot.json"
+    [[ -r $f ]] && { printf '%s' "$f"; return; }
+  fi
+  f="${TMPDIR:-/tmp}/psysonic-cli-snapshot.json"
+  [[ -r $f ]] && printf '%s' "$f"
+}
+
+_psysonic_complete() {
+  local cur
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  local prev=""
+  (( COMP_CWORD > 0 )) && prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+  if [[ $prev == --tail ]]; then
+    _psysonic_compopt -o default
+    COMPREPLY=()
+    return
+  fi
+
+  local i pidx=0
+  for (( i = 1; i < COMP_CWORD; i++ )); do
+    [[ ${COMP_WORDS[i]} == --player ]] && pidx=$i
+  done
+
+  if (( pidx == 0 )); then
+    local has_logs=0
+    for (( i = 1; i < COMP_CWORD; i++ )); do
+      [[ ${COMP_WORDS[i]} == --logs ]] && has_logs=1
+    done
+    if [[ ${COMP_WORDS[1]} == completions && COMP_CWORD -eq 2 ]]; then
+      _psysonic_compreply_from_compgen 'help bash zsh' "$cur"
+      return
+    fi
+    if (( has_logs )); then
+      _psysonic_compreply_from_compgen '--tail -f --follow' "$cur"
+    else
+      _psysonic_compreply_from_compgen '--help --version --info --json --quiet --logs --player completions' "$cur"
+    fi
+    return
+  fi
+
+  local -a sub=()
+  for (( i = pidx + 1; i < COMP_CWORD; i++ )); do
+    sub+=("${COMP_WORDS[i]}")
+  done
+  local n=${#sub[@]}
+
+  if (( n == 0 )); then
+    _psysonic_compreply_from_compgen 'next prev play pause stop seek volume shuffle repeat mute unmute star unstar rating reload audio-device library server search mix' "$cur"
+    return
+  fi
+
+  case ${sub[0]} in
+    audio-device)
+      if (( n == 1 )); then
+        _psysonic_compreply_from_compgen 'list set' "$cur"
+      elif [[ ${sub[1]} == set ]] && (( n == 2 )); then
+        COMPREPLY=()
+        local jf d
+        jf="$(_psysonic_audio_device_json)"
+        if [[ -n $jf ]] && command -v jq &>/dev/null; then
+          while IFS= read -r d; do
+            [[ -n $d && $d == "$cur"* ]] && COMPREPLY+=("$d")
+          done < <(jq -r '.devices[]? | select(type == "string")' "$jf" 2>/dev/null)
+        fi
+        while IFS= read -r line; do
+          [[ -n $line ]] && COMPREPLY+=("$line")
+        done < <(compgen -W 'default' -- "$cur")
+        ((${#COMPREPLY[@]})) && _psysonic_compopt -o filenames
+      fi
+      ;;
+    library)
+      if (( n == 1 )); then
+        _psysonic_compreply_from_compgen 'list set' "$cur"
+      elif [[ ${sub[1]} == set ]] && (( n == 2 )); then
+        COMPREPLY=()
+        local jf id line
+        jf="$(_psysonic_library_json)"
+        if [[ -n $jf ]] && command -v jq &>/dev/null; then
+          while IFS= read -r id; do
+            [[ -n $id && $id == "$cur"* ]] && COMPREPLY+=("$id")
+          done < <(jq -r '.folders[]? | select(.id != null) | .id | tostring' "$jf" 2>/dev/null)
+        fi
+        while IFS= read -r line; do
+          [[ -n $line ]] && COMPREPLY+=("$line")
+        done < <(compgen -W 'all' -- "$cur")
+        ((${#COMPREPLY[@]})) && _psysonic_compopt -o filenames
+      fi
+      ;;
+    mix)
+      (( n == 1 )) && _psysonic_compreply_from_compgen 'append new' "$cur"
+      ;;
+    server)
+      if (( n == 1 )); then
+        _psysonic_compreply_from_compgen 'list set' "$cur"
+      elif [[ ${sub[1]} == set ]] && (( n == 2 )); then
+        COMPREPLY=()
+        local jf sid
+        jf="$(_psysonic_snapshot_json)"
+        if [[ -n $jf ]] && command -v jq &>/dev/null; then
+          while IFS= read -r sid; do
+            [[ -n $sid && $sid == "$cur"* ]] && COMPREPLY+=("$sid")
+          done < <(jq -r '.servers[]? | select(.id != null) | .id | tostring' "$jf" 2>/dev/null)
+        fi
+        ((${#COMPREPLY[@]})) && _psysonic_compopt -o filenames
+      fi
+      ;;
+    search)
+      if (( n == 1 )); then
+        _psysonic_compreply_from_compgen 'track album artist' "$cur"
+      elif (( n >= 2 )); then
+        _psysonic_compopt -o default
+        COMPREPLY=()
+      fi
+      ;;
+    repeat)
+      (( n == 1 )) && _psysonic_compreply_from_compgen 'off all one' "$cur"
+      ;;
+    rating)
+      (( n == 1 )) && _psysonic_compreply_from_compgen '0 1 2 3 4 5' "$cur"
+      ;;
+    seek|volume)
+      if (( n == 1 )); then
+        _psysonic_compopt -o default
+        COMPREPLY=()
+      fi
+      ;;
+    play)
+      if (( n == 1 )); then
+        _psysonic_compopt -o default
+        COMPREPLY=()
+      fi
+      ;;
+  esac
+}
+
+complete -F _psysonic_complete psysonic

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1776877367,
+        "narHash": "sha256-EHq1/OX139R1RvBzOJ0aMRT3xnWyqtHBRUBuO1gFzjI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "0726a0ecb6d4e08f6adced58726b95db924cef57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,121 @@
+{
+  description = ''
+    Psysonic for NixOS / nixpkgs: installable app + dev shell.
+
+    Packages:
+      nix build .#psysonic          # or .#default — desktop app (.desktop + icon)
+      nix profile install .#psysonic
+
+    Run (after build, or from any clone with flake):
+      nix run .#psysonic
+      nix run github:Psychotoxical/psysonic
+
+    Development:
+      nix develop                   # mkShell (Rust/Node/WebKit deps + hooks)
+      nix shell .#devShells.default # same environment without entering subshell semantics
+
+    Release pipeline updates `flake.lock` (nixpkgs pin refresh) and
+    `nix/upstream-sources.json` (npmDepsHash) on every `v*` tag push —
+    see `.github/workflows/release.yml` (verify-nix job). Package version
+    is read from `package.json`; nothing in this file needs manual bumping
+    per release.
+  '';
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      inherit (nixpkgs) lib;
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      forSystem = f: lib.genAttrs systems f;
+
+      mkShellFor =
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          gstPlugins = with pkgs.gst_all_1; [
+            gstreamer
+            gst-plugins-base
+            gst-plugins-good
+            gst-plugins-bad
+          ];
+          gstPluginPath = pkgs.lib.makeSearchPath "lib/gstreamer-1.0" gstPlugins;
+        in
+        pkgs.mkShell {
+          packages = with pkgs; [
+            nodejs_22
+            rustc
+            cargo
+            cmake
+            pkg-config
+            openssl
+            gtk3
+            webkitgtk_4_1
+            libsoup_3
+            glib-networking
+            atk
+            cairo
+            gdk-pixbuf
+            glib
+            pango
+            librsvg
+            alsa-lib
+            libayatana-appindicator
+          ]
+          ++ gstPlugins;
+
+          shellHook = ''
+            export LD_LIBRARY_PATH="${pkgs.libayatana-appindicator}/lib''${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+            export GST_PLUGIN_PATH="${gstPluginPath}''${GST_PLUGIN_PATH:+:$GST_PLUGIN_PATH}"
+            export GIO_EXTRA_MODULES="${pkgs.glib-networking}/lib/gio/modules''${GIO_EXTRA_MODULES:+:$GIO_EXTRA_MODULES}"
+            export GDK_BACKEND=x11
+            export WEBKIT_DISABLE_COMPOSITING_MODE=1
+            export WEBKIT_DISABLE_DMABUF_RENDERER=1
+            unset CI
+          '';
+
+          OPENSSL_LIB_DIR = "${pkgs.openssl.out}/lib";
+          OPENSSL_INCLUDE_DIR = "${pkgs.openssl.dev}/include";
+        };
+
+      upstreamMeta = lib.importJSON ./nix/upstream-sources.json;
+
+      psysonicFor =
+        system:
+        nixpkgs.legacyPackages.${system}.callPackage ./nix/psysonic.nix {
+          src = self;
+          inherit upstreamMeta;
+        };
+    in
+    {
+      devShells = forSystem (system: { default = mkShellFor system; });
+
+      packages = forSystem (system: {
+        psysonic = psysonicFor system;
+        default = psysonicFor system;
+      });
+
+      apps = forSystem (
+        system:
+        let
+          p = psysonicFor system;
+        in
+        {
+          default = {
+            type = "app";
+            program = lib.getExe p;
+            meta = {
+              inherit (p.meta) description homepage license;
+              mainProgram = "psysonic";
+            };
+          };
+        }
+      );
+    };
+}

index.html

@@ -6,9 +6,6 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta name="description" content="Psysonic – Dein Navidrome Desktop Player" />
     <title>Psysonic</title>
-    <link rel="preconnect" href="https://fonts.googleapis.com" />
-    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap" rel="stylesheet" />
   </head>
   <body>
     <div id="root"></div>

nix/psysonic.nix

@@ -0,0 +1,176 @@
+# Installable Psysonic (Tauri): npm build → cargo tauri build --no-bundle.
+# Source: `self` (this repo). Package version is read from package.json.
+# `npmDepsHash` in nix/upstream-sources.json is refreshed by the release
+# workflow (see .github/workflows/release.yml, verify-nix job).
+
+{
+  lib,
+  stdenv,
+  fetchNpmDeps,
+  npmHooks,
+  rustPlatform,
+  cargo,
+  rustc,
+  pkg-config,
+  cmake,
+  openssl,
+  gtk3,
+  webkitgtk_4_1,
+  libsoup_3,
+  glib-networking,
+  alsa-lib,
+  libayatana-appindicator,
+  atk,
+  cairo,
+  gdk-pixbuf,
+  glib,
+  pango,
+  librsvg,
+  cargo-tauri,
+  nodejs,
+  makeWrapper,
+  wrapGAppsHook4,
+  copyDesktopItems,
+  makeDesktopItem,
+  gst_all_1,
+  src,
+  upstreamMeta,
+}:
+
+let
+  version = (lib.importJSON (src + "/package.json")).version;
+  # WebKit media stack needs discoverable GStreamer plugins (e.g. appsink in gst-plugins-base).
+  gstPlugins = with gst_all_1; [
+    gstreamer
+    gst-plugins-base
+    gst-plugins-good
+    gst-plugins-bad
+  ];
+  gstPluginPath = lib.makeSearchPath "lib/gstreamer-1.0" gstPlugins;
+  srcClean = lib.cleanSourceWith {
+    inherit src;
+    filter =
+      path: _:
+      let
+        f = toString path;
+      in
+      !(lib.hasInfix "/node_modules/" f)
+      && !(lib.hasInfix "/dist/" f)
+      && !(lib.hasInfix "/target/" f)
+      && !(lib.hasInfix "/.git/" f)
+      && !(lib.hasInfix "/result/" f)
+      && !(lib.hasInfix "/.flatpak-builder/" f);
+  };
+  npmDeps = fetchNpmDeps {
+    src = srcClean;
+    hash = upstreamMeta.npmDepsHash;
+  };
+  cargoLockFile = src + "/src-tauri/Cargo.lock";
+in
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "psysonic";
+  inherit version;
+  src = srcClean;
+  inherit npmDeps;
+
+  strictDeps = true;
+
+  # cmake is only for Rust deps (e.g. libopus); no top-level CMakeLists.txt in repo root
+  dontUseCmakeConfigure = true;
+
+  nativeBuildInputs = [
+    npmHooks.npmConfigHook
+    cargo
+    rustc
+    rustPlatform.cargoSetupHook
+    pkg-config
+    cmake
+    makeWrapper
+    wrapGAppsHook4
+    copyDesktopItems
+    cargo-tauri
+    nodejs
+  ];
+
+  buildInputs = [
+    gtk3
+    webkitgtk_4_1
+    libsoup_3
+    glib-networking
+    openssl
+    alsa-lib
+    libayatana-appindicator
+    atk
+    cairo
+    gdk-pixbuf
+    glib
+    pango
+    librsvg
+  ]
+  ++ gstPlugins;
+
+  cargoRoot = "src-tauri";
+  cargoDeps = rustPlatform.importCargoLock {
+    lockFile = cargoLockFile;
+    # Local path overrides for `[patch.crates-io]` entries in src-tauri/Cargo.toml.
+    # Keep in sync with that block — importCargoLock needs the source to match
+    # the lockfile entries for patched crates (otherwise it tries to fetch from
+    # crates.io and the hash mismatches).
+    outputHashes = { };
+  };
+
+  dontUseCargoParallelJobs = true;
+
+  env = {
+    OPENSSL_DIR = "${openssl.dev}";
+    OPENSSL_LIB_DIR = "${openssl.out}/lib";
+    OPENSSL_INCLUDE_DIR = "${openssl.dev}/include";
+    VITE_LASTFM_API_KEY = "";
+    VITE_LASTFM_API_SECRET = "";
+  };
+
+  # beforeBuildCommand runs npm run build; npmConfigHook supplies offline node_modules
+  buildPhase = ''
+    runHook preBuild
+    export HOME=$(mktemp -d)
+    (cd src-tauri && cargo tauri build --no-bundle -v)
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm755 src-tauri/target/release/psysonic -t $out/bin
+    install -Dm644 src-tauri/icons/128x128.png $out/share/icons/hicolor/128x128/apps/psysonic.png
+    runHook postInstall
+  '';
+
+  desktopItems = [
+    (makeDesktopItem {
+      name = "psysonic";
+      desktopName = "Psysonic";
+      comment = "Subsonic-compatible music player";
+      icon = "psysonic";
+      exec = "psysonic";
+      categories = [ "AudioVideo" "Audio" "Player" ];
+    })
+  ];
+
+  postFixup = ''
+    wrapProgram $out/bin/psysonic \
+      --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ libayatana-appindicator ]}" \
+      --prefix GST_PLUGIN_PATH : "${gstPluginPath}" \
+      --prefix GIO_EXTRA_MODULES : "${glib-networking}/lib/gio/modules" \
+      --set GDK_BACKEND x11 \
+      --set WEBKIT_DISABLE_COMPOSITING_MODE 1 \
+      --set WEBKIT_DISABLE_DMABUF_RENDERER 1
+  '';
+
+  meta = {
+    description = "Desktop music player for Subsonic-compatible servers";
+    homepage = "https://github.com/Psychotoxical/psysonic";
+    license = lib.licenses.gpl3Only;
+    mainProgram = "psysonic";
+    platforms = lib.platforms.linux;
+  };
+})

nix/upstream-sources.json

@@ -0,0 +1,3 @@
+{
+  "npmDepsHash": "sha256-PYqvngGz/yreDiQxAEIhD5nuEPezAELj/zaEpJ7c1f4="
+}

nixos-install.md

@@ -0,0 +1,134 @@
+# Installing Psysonic on NixOS (flake)
+
+This guide is for **NixOS** users who want **Psysonic from the upstream Git flake** (`github:Psychotoxical/psysonic`). Supported systems match the flake: **`x86_64-linux`** and **`aarch64-linux`**.
+
+## Prerequisites
+
+**Flakes** enabled (e.g. in `configuration.nix`):
+
+```nix
+nix.settings.experimental-features = [ "nix-command" "flakes" ];
+```
+
+## Binary cache (Cachix)
+
+The project publishes store paths to a public Cachix cache so you can **substitute** binaries instead of compiling Psysonic locally on every machine.
+
+- **Cache page:** [psysonic.cachix.org](https://psysonic.cachix.org)
+- **Substituter URL:** `https://psysonic.cachix.org`
+- **Public key** (trust this only if it matches what you expect from the cache owners):
+
+  ```text
+  psysonic.cachix.org-1:M9cQyQ7tgvUWOQ5Pyt8ozlMoPLtOZir6MfRuTH9/VYA=
+  ```
+
+### NixOS (`configuration.nix` or a flake module)
+
+Add the substituter **and** its signing key under `nix.settings`. Keep `cache.nixos.org` in the list so ordinary `nixpkgs` binaries still resolve:
+
+```nix
+{
+  nix.settings = {
+    substituters = [
+      "https://psysonic.cachix.org"
+      "https://cache.nixos.org/"
+    ];
+    trusted-public-keys = [
+      "psysonic.cachix.org-1:M9cQyQ7tgvUWOQ5Pyt8ozlMoPLtOZir6MfRuTH9/VYA="
+      "cache.nixos.org-1:6NCHdSuAYQQOxGEKTGXLN9WWRXoSBT8GRiSnR6IdfGW="
+    ];
+  };
+}
+```
+
+After `nixos-rebuild switch`, builds that hit the cache will download from Cachix. More background: [Cachix — Getting started](https://docs.cachix.org/getting-started).
+
+## Install on NixOS (flake configuration)
+
+Add the repo as an **input**, then reference **`packages.<system>.psysonic`** (or **`default`**, which is the same package).
+
+### Example: top-level `flake.nix` + `nixosConfigurations`
+
+```nix
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    psysonic.url = "github:Psychotoxical/psysonic";
+  };
+
+  outputs = { self, nixpkgs, ... }@inputs: let
+    system = "x86_64-linux";
+  in {
+    nixosConfigurations.my-host = nixpkgs.lib.nixosSystem {
+      inherit system;
+      modules = [
+        ./configuration.nix
+        {
+          environment.systemPackages = [
+            inputs.psysonic.packages.${system}.psysonic
+          ];
+        }
+      ];
+    };
+  };
+}
+```
+
+Inside a **module** where you already have `pkgs` and flake `inputs` in scope, a common pattern is:
+
+```nix
+environment.systemPackages = with pkgs; [
+  # …
+  inputs.psysonic.packages.${pkgs.stdenv.hostPlatform.system}.psysonic
+];
+```
+
+### Pinning a revision or tag
+
+Follow **`main`** (above) to track the moving branch, or pin for reproducibility:
+
+```nix
+psysonic.url = "github:Psychotoxical/psysonic?ref=app-v1.34.13";  # example: release tag
+```
+
+Use a tag or commit SHA that exists on GitHub; the release workflow keeps **`flake.lock`** and **`nix/upstream-sources.json`** (`npmDepsHash`) in sync on tagged releases.
+
+### Apply configuration
+
+- **NixOS flake host**
+
+  ```bash
+  sudo nixos-rebuild switch --flake .#my-host
+  ```
+
+- **Home Manager** (if used separately)
+
+  ```bash
+  home-manager switch --flake .#my-user@my-host
+  ```
+
+## Home Manager
+
+If you manage packages with [Home Manager](https://github.com/nix-community/home-manager), add the same package to `home.packages`:
+
+```nix
+home.packages = [
+  inputs.psysonic.packages.${pkgs.stdenv.hostPlatform.system}.psysonic
+];
+```
+
+(Adjust how `inputs` / `pkgs` are passed into your Home Manager module.)
+
+## Desktop entry
+
+The flake package installs a **`.desktop`** file and icon via `copyDesktopItems`; after `nixos-rebuild switch` (or a Home Manager activation that includes the package), Psysonic should appear in your application launcher like any other desktop app.
+
+## Troubleshooting (Linux / WebKit)
+
+Some GPU / compositor setups show a black window or broken scrolling under Wayland/EGL. The upstream Help / FAQ documents workarounds (e.g. running under **X11** and compositor-related env vars). Those apply to the Nix-built binary as well as other Linux builds.
+
+## More detail in-repo
+
+- **`flake.nix`** — package outputs, `devShell`, supported systems (see comments there for `nix build` / `nix develop`).
+- **`nix/psysonic.nix`** — how the app is built from this source tree.
+- **`.github/workflows/release.yml`** — `verify-nix` job: refreshes lock/npm hash and pushes store paths to Cachix on release tags.

package-lock.json

@@ -1,25 +1,42 @@
 {
   "name": "psysonic",
-  "version": "1.8.0",
+  "version": "1.44.0-dev",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "psysonic",
-      "version": "1.8.0",
+      "version": "1.44.0-dev",
       "dependencies": {
+        "@fontsource-variable/dm-sans": "^5.2.8",
+        "@fontsource-variable/figtree": "^5.2.10",
+        "@fontsource-variable/geist": "^5.2.8",
+        "@fontsource-variable/golos-text": "^5.2.8",
+        "@fontsource-variable/inter": "^5.2.8",
+        "@fontsource-variable/jetbrains-mono": "^5.2.8",
+        "@fontsource-variable/lexend": "^5.2.11",
+        "@fontsource-variable/manrope": "^5.2.8",
+        "@fontsource-variable/nunito": "^5.2.7",
+        "@fontsource-variable/outfit": "^5.2.8",
+        "@fontsource-variable/plus-jakarta-sans": "^5.2.8",
+        "@fontsource-variable/rubik": "^5.2.8",
+        "@fontsource-variable/space-grotesk": "^5.2.10",
+        "@fontsource-variable/unbounded": "^5.2.8",
+        "@tanstack/react-virtual": "^3.13.23",
         "@tauri-apps/api": "^2",
-        "@tauri-apps/plugin-dialog": "^2.6.0",
-        "@tauri-apps/plugin-fs": "^2.4.5",
+        "@tauri-apps/plugin-dialog": "^2.7.0",
+        "@tauri-apps/plugin-fs": "^2.5.0",
         "@tauri-apps/plugin-global-shortcut": "^2",
-        "@tauri-apps/plugin-notification": "^2",
+        "@tauri-apps/plugin-process": "^2.3.1",
         "@tauri-apps/plugin-shell": "^2",
         "@tauri-apps/plugin-store": "^2",
+        "@tauri-apps/plugin-updater": "^2.10.0",
         "@tauri-apps/plugin-window-state": "^2.4.1",
         "axios": "^1.7.7",
         "i18next": "^25.8.16",
         "lucide-react": "^0.462.0",
         "md5": "^2.3.0",
+        "papaparse": "^5.5.3",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "react-i18next": "^16.5.6",
@@ -30,11 +47,13 @@
         "@tauri-apps/cli": "^2",
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@@ -1225,6 +1331,40 @@
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+        "url": "https://github.com/sponsors/tannerlinsley"
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       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
@@ -2679,6 +3176,23 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "psysonic",
-  "version": "1.15.0",
+  "version": "1.44.0-dev",
   "private": true,
   "scripts": {
     "dev": "vite",
@@ -8,21 +8,39 @@
     "preview": "vite preview",
     "tauri": "tauri",
     "tauri:dev": "GDK_BACKEND=x11 WEBKIT_DISABLE_COMPOSITING_MODE=1 tauri dev",
-    "tauri:build": "tauri build"
+    "tauri:build": "tauri build",
+    "test": "vitest run"
   },
   "dependencies": {
+    "@fontsource-variable/dm-sans": "^5.2.8",
+    "@fontsource-variable/figtree": "^5.2.10",
+    "@fontsource-variable/geist": "^5.2.8",
+    "@fontsource-variable/golos-text": "^5.2.8",
+    "@fontsource-variable/inter": "^5.2.8",
+    "@fontsource-variable/jetbrains-mono": "^5.2.8",
+    "@fontsource-variable/lexend": "^5.2.11",
+    "@fontsource-variable/manrope": "^5.2.8",
+    "@fontsource-variable/nunito": "^5.2.7",
+    "@fontsource-variable/outfit": "^5.2.8",
+    "@fontsource-variable/plus-jakarta-sans": "^5.2.8",
+    "@fontsource-variable/rubik": "^5.2.8",
+    "@fontsource-variable/space-grotesk": "^5.2.10",
+    "@fontsource-variable/unbounded": "^5.2.8",
+    "@tanstack/react-virtual": "^3.13.23",
     "@tauri-apps/api": "^2",
-    "@tauri-apps/plugin-dialog": "^2.6.0",
-    "@tauri-apps/plugin-fs": "^2.4.5",
+    "@tauri-apps/plugin-dialog": "^2.7.0",
+    "@tauri-apps/plugin-fs": "^2.5.0",
     "@tauri-apps/plugin-global-shortcut": "^2",
-    "@tauri-apps/plugin-notification": "^2",
+    "@tauri-apps/plugin-process": "^2.3.1",
     "@tauri-apps/plugin-shell": "^2",
     "@tauri-apps/plugin-store": "^2",
+    "@tauri-apps/plugin-updater": "^2.10.0",
     "@tauri-apps/plugin-window-state": "^2.4.1",
     "axios": "^1.7.7",
     "i18next": "^25.8.16",
     "lucide-react": "^0.462.0",
     "md5": "^2.3.0",
+    "papaparse": "^5.5.3",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-i18next": "^16.5.6",
@@ -33,10 +51,12 @@
     "@tauri-apps/cli": "^2",
     "@types/md5": "^2.3.5",
     "@types/node": "^25.3.5",
+    "@types/papaparse": "^5.5.2",
     "@types/react": "^18.3.11",
     "@types/react-dom": "^18.3.1",
     "@vitejs/plugin-react": "^4.3.2",
     "typescript": "^5.5.3",
-    "vite": "^6.0.3"
+    "vite": "^6.0.3",
+    "vitest": "^4.1.3"
   }
 }

packages/aur/PKGBUILD

@@ -1,6 +1,6 @@
 # Maintainer: Psychotoxic <psychotoxic@gmx.de>
 pkgname=psysonic
-pkgver=1.15.0
+pkgver=1.43.0
 pkgrel=1
 pkgdesc="Desktop music player for Subsonic API-compatible servers (Navidrome, Gonic, etc.)"
 arch=('x86_64')
@@ -9,7 +9,6 @@ license=('GPL-3.0-only')
 depends=(
   'webkit2gtk-4.1'
   'gtk3'
-  'libayatana-appindicator'
   'openssl'
   'alsa-lib'
 )
@@ -17,8 +16,11 @@ makedepends=(
   'npm'
   'rust'
   'cargo'
+  'clang'
+  'nasm'
+  'cmake'
 )
-source=("$pkgname-$pkgver.tar.gz::https://github.com/Psychotoxical/psysonic/archive/refs/tags/v$pkgver.tar.gz")
+source=("$pkgname-$pkgver.tar.gz::https://github.com/Psychotoxical/psysonic/archive/refs/tags/app-v$pkgver.tar.gz")
 sha256sums=('SKIP')
 
 build() {
@@ -27,6 +29,20 @@ build() {
   export CARGO_HOME="$srcdir/cargo-home"
   export npm_config_cache="$srcdir/npm-cache"
 
+  # ring (used by reqwest → rustls-tls) ships C/asm objects whose
+  # symbols (ring_core_*) lld cannot resolve.  On Arch/CachyOS, -fuse-ld=lld
+  # is hardcoded into rustc itself (not just makepkg.conf RUSTFLAGS), so a
+  # string substitution is a no-op.  Appending -C link-arg=-fuse-ld=bfd works
+  # because the last -fuse-ld=* flag passed to cc wins.
+  export RUSTFLAGS="${RUSTFLAGS} -C link-arg=-fuse-ld=bfd"
+
+  # CachyOS sets -flto=auto in CFLAGS.  ring compiles its C/asm objects via the
+  # cc crate and picks up CFLAGS, producing fat-LTO objects.  bfd cannot resolve
+  # symbols from fat-LTO objects when linking against non-LTO Rust rlibs, causing
+  # "undefined reference to ring_core_*" even though the symbols exist in the .a.
+  # Strip CFLAGS/CXXFLAGS entirely so ring builds plain ELF objects.
+  unset CFLAGS CXXFLAGS
+
   npm install
   npm run tauri:build -- --no-bundle
 }

scripts/README.md

@@ -0,0 +1,52 @@
+# Scripts
+
+## install.sh - Auto-Installer for Debian and RHEL-based Systems
+
+This script automatically downloads and installs the latest Psysonic release from GitHub Releases.
+
+### Supported Distributions
+
+- **Debian/Ubuntu**: Downloads and installs `.deb` package
+- **RHEL/Fedora/CentOS**: Downloads and installs `.rpm` package
+
+### Usage
+
+#### Quick Install (Recommended)
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/Psychotoxical/psysonic/main/scripts/install.sh | sudo bash
+```
+
+#### Manual Installation
+
+```bash
+# Download the script
+wget https://raw.githubusercontent.com/Psychotoxical/psysonic/main/scripts/install.sh
+
+# Make it executable
+chmod +x install.sh
+
+# Run with sudo
+sudo ./install.sh
+```
+
+### What it does
+
+1. Detects your OS type (Debian or RHEL-based)
+2. Fetches the latest release from GitHub
+3. Downloads the appropriate package (.deb or .rpm)
+4. Installs it using your system's package manager
+5. Cleans up temporary files
+
+### Requirements
+
+- `curl` - for downloading packages
+- `sudo` or root access
+- Internet connection
+- Supported package manager (apt-get, dnf, or yum)
+
+### Notes
+
+- If Psysonic is already installed, the script will ask if you want to reinstall
+- The script automatically handles dependency installation for Debian systems
+- After installation, you can launch Psysonic from your application menu or by running `psysonic` in the terminal

scripts/generate-update-manifest.js

@@ -0,0 +1,89 @@
+#!/usr/bin/env node
+// Generates latest.json for the Tauri updater from a GitHub release.
+// Reads .sig files uploaded by tauri-action, assembles the manifest, writes latest.json.
+//
+// macOS-only for now — Windows + Linux are added once their signing pipelines
+// (Certum cert for Windows, native package managers for Linux) are wired up.
+//
+// Required env vars: VERSION, GITHUB_TOKEN
+// Usage: node scripts/generate-update-manifest.js
+
+const { execSync } = require('child_process');
+const fs = require('fs');
+
+const VERSION = process.env.VERSION;
+const REPO = 'Psychotoxical/psysonic';
+const TAG = `app-v${VERSION}`;
+
+if (!VERSION) {
+  console.error('VERSION env var required');
+  process.exit(1);
+}
+
+// Platform → update bundle filename (produced by tauri-action with updater plugin)
+const PLATFORM_FILES = {
+  'darwin-aarch64': 'Psysonic_aarch64.app.tar.gz',
+  'darwin-x86_64':  'Psysonic_x64.app.tar.gz',
+};
+
+const platforms = {};
+
+// A real minisign .sig file is multi-line and ~200+ chars.
+// A public key (RWTxxx... single line, ~56 chars) must never appear here.
+function validateSignature(sig, platform, sigFile) {
+  if (/^RWT[A-Za-z0-9+/]{10,}={0,2}$/.test(sig)) {
+    throw new Error(
+      `${platform}: .sig file "${sigFile}" contains a PUBLIC KEY instead of a signature.\n` +
+      `  Got: ${sig}\n` +
+      `  TAURI_SIGNING_PRIVATE_KEY must be the private key, not the public one.`
+    );
+  }
+  if (sig.length < 80) {
+    throw new Error(
+      `${platform}: .sig file "${sigFile}" looks too short (${sig.length} chars) to be a valid signature.`
+    );
+  }
+}
+
+for (const [platform, filename] of Object.entries(PLATFORM_FILES)) {
+  const sigFile = `${filename}.sig`;
+  try {
+    execSync(
+      `gh release download "${TAG}" --repo "${REPO}" -p "${sigFile}" --clobber`,
+      { stdio: 'pipe' }
+    );
+    const signature = fs.readFileSync(sigFile, 'utf8').trim();
+    validateSignature(signature, platform, sigFile);
+    const url = `https://github.com/${REPO}/releases/download/${TAG}/${filename}`;
+    platforms[platform] = { signature, url };
+    console.log(`✓ ${platform}`);
+  } catch (e) {
+    console.warn(`⚠ Skipping ${platform}: ${e.message}`);
+  }
+}
+
+if (Object.keys(platforms).length === 0) {
+  console.error('No platforms found — aborting manifest generation');
+  process.exit(1);
+}
+
+let notes = '';
+try {
+  const raw = execSync(
+    `gh release view "${TAG}" --repo "${REPO}" --json body`,
+    { stdio: 'pipe' }
+  ).toString();
+  notes = JSON.parse(raw).body ?? '';
+} catch {
+  console.warn('Could not fetch release notes');
+}
+
+const manifest = {
+  version: VERSION,
+  notes,
+  pub_date: new Date().toISOString(),
+  platforms,
+};
+
+fs.writeFileSync('latest.json', JSON.stringify(manifest, null, 2));
+console.log(`\nWrote latest.json for v${VERSION} with platforms: ${Object.keys(platforms).join(', ')}`);

scripts/install.sh

@@ -0,0 +1,171 @@
+#!/bin/bash
+set -e
+
+# Psysonic Auto-Installer
+# Automatically detects your OS and installs the latest release from GitHub
+
+REPO="Psychotoxical/psysonic"
+APP_NAME="psysonic"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+info() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+    exit 1
+}
+
+# Check if running as root
+check_root() {
+    if [ "$EUID" -ne 0 ]; then
+        error "Please run this script as root (use sudo)"
+    fi
+}
+
+# Detect package manager and OS type
+detect_os() {
+    if command -v apt &> /dev/null; then
+        OS_TYPE="debian"
+        PACKAGE_MANAGER="apt"
+        info "Detected Debian/Ubuntu-based system (apt)"
+    elif command -v dnf &> /dev/null; then
+        OS_TYPE="rhel"
+        PACKAGE_MANAGER="dnf"
+        info "Detected RHEL/Fedora-based system (dnf)"
+    elif command -v yum &> /dev/null; then
+        OS_TYPE="rhel"
+        PACKAGE_MANAGER="yum"
+        info "Detected RHEL/CentOS-based system (yum)"
+    else
+        error "Unsupported package manager. This installer supports Debian/Ubuntu and RHEL/Fedora/CentOS systems."
+    fi
+}
+
+# Get the latest release download URL for the specific package type
+get_download_url() {
+    local api_url="https://api.github.com/repos/${REPO}/releases/latest"
+    
+    info "Fetching latest release information..."
+    
+    local release_info
+    release_info=$(curl -s "$api_url")
+    
+    if echo "$release_info" | grep -q "message.*Not Found"; then
+        error "Could not fetch release information. Please check your internet connection."
+    fi
+    
+    local tag_name
+    tag_name=$(echo "$release_info" | grep -o '"tag_name": *"[^"]*"' | head -1 | cut -d'"' -f4)
+    
+    if [ -z "$tag_name" ]; then
+        error "Could not determine latest release version."
+    fi
+    
+    info "Latest version: $tag_name"
+    
+    local download_url=""
+    
+    if [ "$OS_TYPE" = "debian" ]; then
+        download_url=$(echo "$release_info" | grep -o '"browser_download_url": *"[^"]*\.deb"' | head -1 | cut -d'"' -f4)
+    elif [ "$OS_TYPE" = "rhel" ]; then
+        download_url=$(echo "$release_info" | grep -o '"browser_download_url": *"[^"]*\.rpm"' | head -1 | cut -d'"' -f4)
+    fi
+    
+    if [ -z "$download_url" ]; then
+        error "Could not find download URL for $OS_TYPE package."
+    fi
+    
+    echo "$download_url"
+}
+
+# Install the package
+install_package() {
+    local download_url="$1"
+    local temp_dir
+    temp_dir=$(mktemp -d)
+    local package_file="$temp_dir/${APP_NAME}_latest"
+    
+    info "Downloading package..."
+    
+    if [ "$OS_TYPE" = "debian" ]; then
+        package_file="${package_file}.deb"
+        curl -L -o "$package_file" "$download_url"
+        
+        info "Installing package..."
+        $PACKAGE_MANAGER install -y "$package_file" || {
+            warn "Trying to fix broken dependencies..."
+            $PACKAGE_MANAGER install -f -y
+        }
+    elif [ "$OS_TYPE" = "rhel" ]; then
+        package_file="${package_file}.rpm"
+        curl -L -o "$package_file" "$download_url"
+        
+        info "Installing package..."
+        $PACKAGE_MANAGER install -y "$package_file"
+    fi
+    
+    # Cleanup
+    rm -rf "$temp_dir"
+}
+
+# Check if app is already installed
+check_installed() {
+    if command -v $APP_NAME &> /dev/null || command -v ${APP_NAME^} &> /dev/null; then
+        warn "${APP_NAME} appears to be already installed."
+        read -p "Do you want to reinstall? (y/N): " -n 1 -r
+        echo
+        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+            info "Installation cancelled."
+            exit 0
+        fi
+    fi
+}
+
+# Main installation flow
+main() {
+    echo -e "${GREEN}"
+    echo "╔══════════════════════════════════════════════════════════╗"
+    echo "║           Psysonic Auto-Installer                        ║"
+    echo "║   Install the latest release from GitHub Releases        ║"
+    echo "╚══════════════════════════════════════════════════════════╝"
+    echo -e "${NC}"
+    
+    check_root
+    detect_os
+    check_installed
+    
+    local download_url
+    download_url=$(get_download_url)
+    
+    if [ -z "$download_url" ]; then
+        error "Failed to get download URL."
+    fi
+    
+    info "Download URL: $download_url"
+    
+    install_package "$download_url"
+    
+    echo ""
+    success "Psysonic has been installed successfully!"
+    echo -e "${BLUE}You can launch it from your application menu or by running:${NC} psysonic"
+    echo ""
+}
+
+# Run main function
+main

scripts/sync-tauri-version-from-package.js

@@ -0,0 +1,30 @@
+#!/usr/bin/env node
+/**
+ * Align src-tauri/Cargo.toml and src-tauri/tauri.conf.json with package.json "version".
+ * Used after npm version in promote workflows so bundle names match release semver.
+ */
+const fs = require('fs');
+const path = require('path');
+
+const root = path.join(__dirname, '..');
+const version = require(path.join(root, 'package.json')).version;
+if (!version || typeof version !== 'string') {
+  console.error('package.json version missing');
+  process.exit(1);
+}
+
+const cargoPath = path.join(root, 'src-tauri', 'Cargo.toml');
+let cargo = fs.readFileSync(cargoPath, 'utf8');
+if (!/^version = "[^"]*"$/m.test(cargo)) {
+  console.error('Cargo.toml: expected a package-level line: version = "..."');
+  process.exit(1);
+}
+cargo = cargo.replace(/^version = "[^"]*"$/m, `version = "${version}"`);
+fs.writeFileSync(cargoPath, cargo);
+console.log(`Cargo.toml -> ${version}`);
+
+const confPath = path.join(root, 'src-tauri', 'tauri.conf.json');
+const conf = JSON.parse(fs.readFileSync(confPath, 'utf8'));
+conf.version = version;
+fs.writeFileSync(confPath, JSON.stringify(conf, null, 2) + '\n');
+console.log(`tauri.conf.json -> ${version}`);

src-tauri/Cargo.toml

@@ -1,13 +1,13 @@
 [package]
 name = "psysonic"
-version = "1.15.0"
+version = "1.44.0-dev"
 description = "Psysonic Desktop Music Player"
 authors = []
 license = ""
 repository = ""
 default-run = "psysonic"
 edition = "2021"
-rust-version = "1.77.2"
+rust-version = "1.89"
 
 [lib]
 name = "psysonic_lib"
@@ -22,8 +22,8 @@ tauri-build = { version = "2", features = [] }
 
 [dependencies]
 tauri = { version = "2", features = ["tray-icon", "image-png"] }
+tauri-plugin-single-instance = "2"
 tauri-plugin-shell = "2"
-tauri-plugin-notification = "2"
 tauri-plugin-global-shortcut = "2"
 tauri-plugin-store = "2"
 tauri-plugin-dialog = "2"
@@ -31,8 +31,60 @@ tauri-plugin-fs = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 rodio = { version = "0.19", default-features = false, features = ["symphonia-all"] }
-reqwest = { version = "0.12", features = ["stream", "json"] }
+symphonia = { version = "0.5", default-features = false, features = ["flac", "mp3", "pcm", "aac", "alac", "isomp4", "vorbis", "ogg", "wav", "adpcm"] }
+reqwest = { version = "0.12", default-features = false, features = ["stream", "json", "multipart", "rustls-tls", "rustls-tls-native-roots", "blocking"] }
+futures-util = "0.3"
 md5 = "0.7"
-tokio = { version = "1", features = ["rt", "time"] }
+tokio = { version = "1", features = ["rt", "time", "sync"] }
 biquad = "0.4"
+ringbuf = "0.3"
 tauri-plugin-window-state = "2.4.1"
+tauri-plugin-process = "2"
+tauri-plugin-updater = "2"
+souvlaki = { version = "0.8", default-features = false, features = ["use_zbus"] }
+discord-rich-presence = "0.2"
+url = "2"
+thread-priority = "1"
+lofty = "0.22"
+sysinfo = { version = "0.33", default-features = false, features = ["disk"] }
+id3 = "1.16.4"
+symphonia-adapter-libopus = "0.2.7"
+rusqlite = { version = "0.37", features = ["bundled"] }
+ebur128 = "0.1"
+
+[target.'cfg(unix)'.dependencies]
+libc = "0.2"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+zbus = { version = "5.9", default-features = false, features = ["blocking-api"] }
+# Match wry/tauri’s WebKitGTK stack — used only to turn off kinetic wheel scrolling.
+webkit2gtk = { version = "2.0", default-features = false, features = ["v2_40"] }
+
+[target.'cfg(windows)'.dependencies]
+windows = { version = "0.58", features = [
+    "Win32_Foundation",
+    "Win32_Graphics",
+    "Win32_Graphics_Gdi",
+    "Win32_System_Com",
+    "Win32_UI_Controls",
+    "Win32_UI_Shell",
+    "Win32_UI_WindowsAndMessaging",
+] }
+
+[patch.crates-io]
+# Local patch for Symphonia's isomp4 demuxer:
+# - Fixes descriptor.unwrap() panic on malformed esds atoms (older iTunes M4A)
+# - Tolerates SL predefined=0x01 (null) used by some older iTunes-purchased files
+# - Gracefully skips malformed trak atoms (e.g. MJPEG cover-art streams) instead
+#   of failing the entire probe
+symphonia-format-isomp4 = { path = "patches/symphonia-format-isomp4" }
+
+# Local patch for cpal's CoreAudio backend on macOS:
+# - Forces IOType::DefaultOutput for all output streams so that macOS never
+#   triggers the TCC microphone-permission prompt. Upstream cpal uses
+#   IOType::HalOutput when the user pins a non-default device, which routes
+#   through AUHAL — that component is flagged as input-capable and triggers
+#   the mic consent dialog on first launch / after each update.
+# - Tradeoff: output-device selection is a no-op on macOS (stream follows
+#   system default). Surfaced in the Settings UI.
+cpal = { path = "patches/cpal-0.15.3" }

src-tauri/Entitlements.plist

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <!-- Sandbox disabled: app is unsigned/ad-hoc signed, so an active sandbox
+         would restrict network access more than without it. macOS users bypass
+         Gatekeeper via: xattr -cr /Applications/Psysonic.app -->
+    <key>com.apple.security.app-sandbox</key>
+    <false/>
+
+    <!-- Allow outbound TCP connections to the Navidrome server (reqwest in audio.rs).
+         Respected by ad-hoc signatures on some macOS versions. -->
+    <key>com.apple.security.network.client</key>
+    <true/>
+</dict>
+</plist>

src-tauri/Info.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <!-- Allow HTTP (non-TLS) connections so that internet radio streams and
+         Navidrome servers running without HTTPS can load media in WKWebView.
+         Without this, macOS App Transport Security blocks HTTP audio src. -->
+    <key>NSAppTransportSecurity</key>
+    <dict>
+        <key>NSAllowsArbitraryLoads</key>
+        <true/>
+    </dict>
+</dict>
+</plist>

src-tauri/capabilities/default.json

@@ -3,12 +3,11 @@
   "identifier": "default",
   "description": "Default capabilities for Psysonic",
   "platforms": ["linux", "macOS", "windows"],
-  "windows": ["main"],
+  "windows": ["main", "mini"],
   "permissions": [
     "core:default",
     "shell:default",
     { "identifier": "shell:allow-open", "allow": [{ "url": "https://**" }] },
-    "notification:default",
     "global-shortcut:allow-register",
     "global-shortcut:allow-unregister",
     "store:default",
@@ -18,19 +17,28 @@
     "store:allow-save",
     "dialog:default",
     "dialog:allow-open",
+    "dialog:allow-save",
     "fs:default",
     "fs:allow-write-file",
+    "fs:allow-read-file",
     "fs:allow-mkdir",
     "fs:scope-download-recursive",
+    "fs:scope-home-recursive",
     "window-state:allow-save-window-state",
     "window-state:allow-restore-state",
     "core:window:allow-set-title",
     "core:window:allow-close",
+    "core:window:allow-minimize",
+    "core:window:allow-toggle-maximize",
     "core:window:allow-hide",
     "core:window:allow-show",
     "core:window:allow-set-fullscreen",
     "core:window:allow-is-fullscreen",
+    "core:window:allow-start-dragging",
     "core:window:allow-create",
-    "core:webview:allow-create-webview-window"
+    "core:window:allow-set-size",
+    "core:webview:allow-create-webview-window",
+    "process:allow-restart",
+    "updater:default"
   ]
 }

src-tauri/gen/schemas/capabilities.json

@@ -1 +0,0 @@
-{"default":{"identifier":"default","description":"Default capabilities for Psysonic","local":true,"windows":["main"],"permissions":["core:default","shell:default",{"identifier":"shell:allow-open","allow":[{"url":"https://**"}]},"notification:default","global-shortcut:allow-register","global-shortcut:allow-unregister","store:default","store:allow-load","store:allow-set","store:allow-get","store:allow-save","dialog:default","dialog:allow-open","fs:default","fs:allow-write-file","fs:allow-mkdir","fs:scope-download-recursive","window-state:allow-save-window-state","window-state:allow-restore-state","core:window:allow-set-title","core:window:allow-close","core:window:allow-hide","core:window:allow-show","core:window:allow-set-fullscreen","core:window:allow-is-fullscreen","core:window:allow-create","core:webview:allow-create-webview-window"],"platforms":["linux","macOS","windows"]}}

src-tauri/patches/cpal-0.15.3/.cargo_vcs_info.json

@@ -0,0 +1,6 @@
+{
+  "git": {
+    "sha1": "ac6cbb2ba55e61665a35ab88ae136a83380d1354"
+  },
+  "path_in_vcs": ""
+}

src-tauri/patches/cpal-0.15.3/.github/workflows/cpal.yml

@@ -0,0 +1,265 @@
+name: cpal
+
+on: [push, pull_request]
+
+jobs:
+
+  clippy-test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Update apt
+      run: sudo apt update
+    - name: Install alsa
+      run: sudo apt-get install libasound2-dev
+    - name: Install libjack
+      run: sudo apt-get install libjack-jackd2-dev libjack-jackd2-0
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        components: clippy
+        target: armv7-linux-androideabi
+    - name: Run clippy
+      run: cargo clippy --all --all-features
+    - name: Run clippy for Android target
+      run: cargo clippy --all --features asio --features oboe/fetch-prebuilt --target armv7-linux-androideabi
+
+  rustfmt-check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        components: rustfmt
+    - name: Run rustfmt
+      run: cargo fmt --all -- --check
+
+  cargo-publish:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install rust
+      uses: dtolnay/rust-toolchain@stable
+    - name: Update apt
+      run: sudo apt update
+    - name: Install alsa
+      run: sudo apt-get install libasound2-dev
+    - name: Verify publish crate
+      uses: katyo/publish-crates@v2
+      with:
+        dry-run: true
+        ignore-unpublished-changes: true
+    - name: Publish crate
+      uses: katyo/publish-crates@v2
+      with:
+        ignore-unpublished-changes: true
+        registry-token: ${{ secrets.CRATESIO_TOKEN }}
+
+  ubuntu-test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Update apt
+      run: sudo apt update
+    - name: Install alsa
+      run: sudo apt-get install libasound2-dev
+    - name: Install libjack
+      run: sudo apt-get install libjack-jackd2-dev libjack-jackd2-0
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+    - name: Run without features
+      run: cargo test --all --no-default-features --verbose
+    - name: Run all features
+      run: cargo test --all --all-features --verbose
+
+  linux-check-and-test-armv7:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install stable toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          target: armv7-unknown-linux-gnueabihf
+
+      - name: Build image
+        run: docker build -t cross/cpal_armv7:v1 ./
+
+      - name: Install cross
+        run: cargo install cross
+
+      - name: Check without features for armv7
+        run: cross check --target armv7-unknown-linux-gnueabihf --workspace --no-default-features --verbose
+
+      - name: Test without features for armv7
+        run: cross test --target armv7-unknown-linux-gnueabihf --workspace --no-default-features --verbose
+
+      - name: Check all features for armv7
+        run: cross check --target armv7-unknown-linux-gnueabihf --workspace --all-features --verbose
+
+      - name: Test all features for armv7
+        run: cross test --target armv7-unknown-linux-gnueabihf --workspace --all-features --verbose
+
+  asmjs-wasm32-test:
+    strategy:
+      matrix:
+        target: [wasm32-unknown-emscripten]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup Emscripten toolchain
+      uses: mymindstorm/setup-emsdk@v14
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        target: ${{ matrix.target }}
+    - name: Build beep example
+      run: cargo build --example beep --release --target ${{ matrix.target }}
+
+  wasm32-bindgen-test:
+
+    strategy:
+      matrix:
+        target: [wasm32-unknown-unknown]
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          target: ${{ matrix.target }}
+      - name: Build beep example
+        run: cargo build --example beep --target ${{ matrix.target }} --features=wasm-bindgen
+
+  wasm32-wasi-test:
+
+    strategy:
+      matrix:
+        target: [wasm32-wasi]
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          target: ${{ matrix.target }}
+      - name: Build beep example
+        run: cargo build --example beep --target ${{ matrix.target }}
+
+  windows-test:
+    strategy:
+      matrix:
+        version: [x86_64, i686]
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install ASIO SDK
+      env:
+        LINK: https://www.steinberg.net/asiosdk
+      run: |
+        curl -L -o asio.zip $env:LINK
+        7z x -oasio asio.zip
+        move asio\*\* asio\
+    - name: Install ASIO4ALL
+      run: choco install asio4all
+    - name: Install llvm and clang
+      run: choco install llvm
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        target: ${{ matrix.version }}-pc-windows-msvc
+    - name: Run without features
+      run: cargo test --all --no-default-features --verbose
+    - name: Run all features
+      run: |
+        $Env:CPAL_ASIO_DIR = "$Env:GITHUB_WORKSPACE\asio"
+        cargo test --all --all-features --verbose
+
+  macos-test:
+    runs-on: macOS-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install llvm and clang
+      run: brew install llvm
+    - name: Install stable
+      uses: dtolnay/rust-toolchain@stable
+    - name: Build beep example
+      run: cargo build --example beep
+    - name: Run without features
+      run: cargo test --all --no-default-features --verbose
+    - name: Run all features
+      run: cargo test --all --all-features --verbose
+
+  android-check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install stable (Android target)
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        target: armv7-linux-androideabi
+    - name: Check android
+      run: cargo check --example android --target armv7-linux-androideabi --features oboe/fetch-prebuilt --verbose
+    - name: Check beep
+      run: cargo check --example beep --target armv7-linux-androideabi --features oboe/fetch-prebuilt --verbose
+    - name: Check enumerate
+      run: cargo check --example enumerate --target armv7-linux-androideabi --features oboe/fetch-prebuilt --verbose
+    - name: Check feedback
+      run: cargo check --example feedback --target armv7-linux-androideabi --features oboe/fetch-prebuilt --verbose
+    - name: Check record_wav
+      run: cargo check --example record_wav --target armv7-linux-androideabi --features oboe/fetch-prebuilt --verbose
+
+  android-apk-build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install stable (Android targets)
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        targets: armv7-linux-androideabi,aarch64-linux-android,i686-linux-android,x86_64-linux-android
+    - name: Set Up Android tools
+      run: |
+        ${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager --sdk_root=$ANDROID_SDK_ROOT --install "platforms;android-30"
+    - name: Install Cargo APK
+      run: cargo install cargo-apk
+    - name: Build APK
+      run: cargo apk build --example android
+
+  ios-build:
+    runs-on: macOS-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install llvm and clang
+      run: brew install llvm
+    - name: Install stable (iOS targets)
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        targets: aarch64-apple-ios,x86_64-apple-ios
+    - name: Install cargo lipo
+      run: cargo install cargo-lipo
+    - name: Build iphonesimulator feedback example
+      run: cd examples/ios-feedback && xcodebuild -scheme cpal-ios-example -configuration Debug -derivedDataPath build -sdk iphonesimulator
+
+  wasm-beep-build:
+    # this only confirms that the Rust source builds
+    # and checks to prevent regressions like #721.
+    #
+    # It does not test the javascript/web integration
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable (wasm32 target)
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32-unknown-unknown
+      - name: Cargo Build
+        working-directory: ./examples/wasm-beep
+        run: cargo build --target wasm32-unknown-unknown
+

src-tauri/patches/cpal-0.15.3/.gitignore

@@ -0,0 +1,6 @@
+/target
+/Cargo.lock
+.cargo/
+.DS_Store
+recorded.wav
+rls*.log

src-tauri/patches/cpal-0.15.3/CHANGELOG.md

@@ -0,0 +1,196 @@
+# Unreleased
+
+# Version 0.15.3 (2024-03-04)
+
+- Add `try_with_sample_rate`, a non-panicking variant of `with_sample_rate`.
+- struct `platform::Stream` is now #[must_use].
+- enum `SupportedBufferSize` and struct `SupportedStreamConfigRange` are now `Copy`.
+- `platform::Device` is now `Clone`.
+- Remove `parking_lot` dependency in favor of the std library.
+- Fix crash on web/wasm when `atomics` flag is enabled.
+- Improve Examples: Migrate wasm example to `trunk`, Improve syth-thones example.
+- Improve CI: Update actions, Use Android 30 API level in CI, Remove `asmjs-unknown-emscripten` target.
+- Update `windows` dependency to v0.54
+- Update `jni` dependency to 0.21
+- Update `alsa` dependency to 0.9
+- Update `oboe` dependency to 0.6
+- Update `ndk` dependency to 0.8 and disable `default-features`.
+- Update `wasm-bindgen` to 0.2.89
+
+# Version 0.15.2 (2023-03-30)
+
+- webaudio: support multichannel output streams
+- Update `windows` dependency
+- wasapi: fix some thread panics
+
+# Version 0.15.1 (2023-03-14)
+
+- Add feature `oboe-shared-stdcxx` to enable `shared-stdcxx` on `oboe` for Android support
+- Remove `thiserror` dependency
+- Swith `mach` dependency to `mach2`
+
+# Version 0.15.0 (2023-01-29)
+
+- Update `windows-rs`, `jack`, `coreaudio-sys`, `oboe`, `alsa` dependencies
+- Switch to the `dasp_sample` crate for the sample trait
+- Switch to `web-sys` on the emscripten target
+- Adopt edition 2021
+- Add disconnection detection on Mac OS
+
+# Version 0.14.1 (2022-10-23)
+
+- Support the 0.6.1 release of `alsa-rs`
+- Fix `asio` feature broken in 0.14.0
+- `NetBSD` support
+- CI improvements
+
+# Version 0.14.0 (2022-08-22)
+
+- Switch to `windows-rs` crate
+- Turn `ndk-glue` into a dev-dependency and use `ndk-context` instead
+- Update dependencies (ndk, ndk-glue, parking_lot, once_cell, jack)
+
+# Version 0.13.5 (2022-01-28)
+
+- Faster sample format conversion
+- Update dependencies (ndk, oboe, ndk-glue, jack, alsa, nix)
+
+# Version 0.13.4 (2021-08-08)
+
+- wasapi: Allow both threading models and switch the default to STA
+- Update dependencies (core-foundation-sys, jni, rust-jack)
+- Alsa: improve stream setup parameters
+
+# Version 0.13.3 (2021-03-29)
+
+- Give each thread a unique name
+- Fix distortion regression on some alsa configs
+
+# Version 0.13.2 (2021-03-16)
+
+- Update dependencies (ndk, nix, oboe, jni, etc)
+
+# Version 0.13.1 (2020-11-08)
+
+- Don't panic when device is plugged out on Windows
+- Update `parking_lot` dependency
+
+# Version 0.13.0 (2020-10-28)
+
+- Add Android support via `oboe-rs`.
+- Add Android APK build an CI job.
+
+# Version 0.12.1 (2020-07-23)
+
+- Bugfix release to get the asio feature working again.
+
+# Version 0.12.0 (2020-07-09)
+
+- Large refactor removing the blocking EventLoop API.
+- Rename many `Format` types to `StreamConfig`:
+  - `Format` type's `data_type` field renamed to `sample_format`.
+  - `Shape` -> `StreamConfig` - The configuration input required to build a stream.
+  - `Format` -> `SupportedStreamConfig` - Describes a single supported stream configuration.
+  - `SupportedFormat` -> `SupportedStreamConfigRange` - Describes a range of supported configurations.
+  - `Device::default_input/output_format` -> `Device::default_input/output_config`.
+  - `Device::supported_input/output_formats` -> `Device::supported_input/output_configs`.
+  - `Device::SupportedInput/OutputFormats` -> `Device::SupportedInput/OutputConfigs`.
+  - `SupportedFormatsError` -> `SupportedStreamConfigsError`
+  - `DefaultFormatError` -> `DefaultStreamConfigError`
+  - `BuildStreamError::FormatNotSupported` -> `BuildStreamError::StreamConfigNotSupported`
+- Address deprecated use of `mem::uninitialized` in WASAPI.
+- Removed `UnknownTypeBuffer` in favour of specifying sample type.
+- Added `build_input/output_stream_raw` methods allowing for dynamically
+  handling sample format type.
+- Added support for DragonFly platform.
+- Add `InputCallbackInfo` and `OutputCallbackInfo` types and update expected
+  user data callback function signature to provide these.
+
+# Version 0.11.0 (2019-12-11)
+
+- Fix some underruns that could occur in ALSA.
+- Add name to `HostId`.
+- Use `snd_pcm_hw_params_set_buffer_time_near` rather than `set_buffer_time_max`
+  in ALSA backend.
+- Remove many uses of `std::mem::uninitialized`.
+- Fix WASAPI capture logic.
+- Panic on stream ID overflow rather than returning an error.
+- Use `ringbuffer` crate in feedback example.
+- Move errors into a separate module.
+- Switch from `failure` to `thiserror` for error handling.
+- Add `winbase` winapi feature to solve windows compile error issues.
+- Lots of CI improvements.
+
+# Version 0.10.0 (2019-07-05)
+
+- core-foundation-sys and coreaudio-rs version bumps.
+- Add an ASIO host, available under Windows.
+- Introduce a new Host API, adding support for alternative audio APIs.
+- Remove sleep loop on macOS in favour of using a `Condvar`.
+- Allow users to handle stream callback errors with a new `StreamEvent` type.
+- Overhaul error handling throughout the crate.
+- Remove unnecessary Mutex from ALSA and WASAPI backends in favour of channels.
+- Remove `panic!` from OutputBuffer Deref impl as it is no longer necessary.
+
+# Version 0.9.0 (2019-06-06)
+
+- Better buffer handling
+- Fix logic error in frame/sample size
+- Added error handling for unknown ALSA device errors
+- Fix resuming a paused stream on Windows (wasapi).
+- Implement `default_output_format` for emscripten backend.
+
+# Version 0.8.1 (2018-03-18)
+
+- Fix the handling of non-default sample rates for coreaudio input streams.
+
+# Version 0.8.0 (2018-02-15)
+
+- Add `record_wav.rs` example. Records 3 seconds to
+  `$CARGO_MANIFEST_DIR/recorded.wav` using default input device.
+- Update `enumerate.rs` example to display default input/output devices and
+  formats.
+- Add input stream support to coreaudio, alsa and windows backends.
+- Introduce `StreamData` type for handling either input or output streams in
+  `EventLoop::run` callback.
+- Add `Device::supported_{input/output}_formats` methods.
+- Add `Device::default_{input/output}_format` methods.
+- Add `default_{input/output}_device` functions.
+- Replace usage of `Voice` with `Stream` throughout the crate.
+- Remove `Endpoint` in favour of `Device` for supporting both input and output
+  streams.
+
+# Version 0.7.0 (2018-02-04)
+
+- Rename `ChannelsCount` to `ChannelCount`.
+- Rename `SamplesRate` to `SampleRate`.
+- Rename the `min_samples_rate` field of `SupportedFormat` to `min_sample_rate`
+- Rename the `with_max_samples_rate()` method of`SupportedFormat` to `with_max_sample_rate()`
+- Rename the `samples_rate` field of `Format` to `sample_rate`
+- Changed the type of the `channels` field of the `SupportedFormat` struct from `Vec<ChannelPosition>` to `ChannelCount` (an alias to `u16`)
+- Remove unused ChannelPosition API.
+- Implement `Endpoint` and `Format` Enumeration for macOS.
+- Implement format handling for macos `build_voice` method.
+
+# Version 0.6.0 (2017-12-11)
+
+- Changed the emscripten backend to consume less CPU.
+- Added improvements to the crate documentation.
+- Implement `pause` and `play` for ALSA backend.
+- Reduced the number of allocations in the CoreAudio backend.
+- Fixes for macOS build (#186, #189).
+
+# Version 0.5.1 (2017-10-21)
+
+- Added `Sample::to_i16()`, `Sample::to_u16()` and `Sample::from`.
+
+# Version 0.5.0 (2017-10-21)
+
+- Removed the dependency on the `futures` library.
+- Removed the `Voice` and `SamplesStream` types.
+- Added `EventLoop::build_voice`, `EventLoop::destroy_voice`, `EventLoop::play`,
+  and `EventLoop::pause` that can be used to create, destroy, play and pause voices.
+- Added a `VoiceId` struct that is now used to identify a voice owned by an `EventLoop`.
+- Changed `EventLoop::run()` to take a callback that is called whenever a voice requires sound data.
+- Changed `supported_formats()` to produce a list of `SupportedFormat` instead of `Format`. A
+  `SupportedFormat` must then be turned into a `Format` in order to build a voice.

src-tauri/patches/cpal-0.15.3/Cargo.toml

@@ -0,0 +1,184 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2021"
+rust-version = "1.70"
+name = "cpal"
+version = "0.15.3"
+description = "Low-level cross-platform audio I/O library in pure Rust."
+documentation = "https://docs.rs/cpal"
+readme = "README.md"
+keywords = [
+    "audio",
+    "sound",
+]
+license = "Apache-2.0"
+repository = "https://github.com/rustaudio/cpal"
+
+[[example]]
+name = "android"
+crate-type = ["cdylib"]
+path = "examples/android.rs"
+
+[[example]]
+name = "beep"
+
+[[example]]
+name = "enumerate"
+
+[[example]]
+name = "feedback"
+
+[[example]]
+name = "record_wav"
+
+[[example]]
+name = "synth_tones"
+
+[dependencies.dasp_sample]
+version = "0.11"
+
+[dev-dependencies.anyhow]
+version = "1.0"
+
+[dev-dependencies.clap]
+version = "4.0"
+features = ["derive"]
+
+[dev-dependencies.hound]
+version = "3.5"
+
+[dev-dependencies.ringbuf]
+version = "0.3"
+
+[features]
+asio = [
+    "asio-sys",
+    "num-traits",
+]
+oboe-shared-stdcxx = ["oboe/shared-stdcxx"]
+
+[target."cfg(all(target_arch = \"wasm32\", target_os = \"unknown\"))".dependencies.js-sys]
+version = "0.3.35"
+
+[target."cfg(all(target_arch = \"wasm32\", target_os = \"unknown\"))".dependencies.wasm-bindgen]
+version = "0.2.58"
+optional = true
+
+[target."cfg(all(target_arch = \"wasm32\", target_os = \"unknown\"))".dependencies.web-sys]
+version = "0.3.35"
+features = [
+    "AudioContext",
+    "AudioContextOptions",
+    "AudioBuffer",
+    "AudioBufferSourceNode",
+    "AudioNode",
+    "AudioDestinationNode",
+    "Window",
+    "AudioContextState",
+]
+
+[target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"netbsd\"))".dependencies.alsa]
+version = "0.9"
+
+[target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"netbsd\"))".dependencies.jack]
+version = "0.11"
+optional = true
+
+[target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"netbsd\"))".dependencies.libc]
+version = "0.2"
+
+[target."cfg(any(target_os = \"macos\", target_os = \"ios\"))".dependencies.core-foundation-sys]
+version = "0.8.2"
+
+[target."cfg(any(target_os = \"macos\", target_os = \"ios\"))".dependencies.mach2]
+version = "0.4"
+
+[target."cfg(target_os = \"android\")".dependencies.jni]
+version = "0.21"
+
+[target."cfg(target_os = \"android\")".dependencies.ndk]
+version = "0.8"
+default-features = false
+
+[target."cfg(target_os = \"android\")".dependencies.ndk-context]
+version = "0.1"
+
+[target."cfg(target_os = \"android\")".dependencies.oboe]
+version = "0.6"
+features = ["java-interface"]
+
+[target."cfg(target_os = \"android\")".dev-dependencies.ndk-glue]
+version = "0.7"
+
+[target."cfg(target_os = \"emscripten\")".dependencies.js-sys]
+version = "0.3.35"
+
+[target."cfg(target_os = \"emscripten\")".dependencies.wasm-bindgen]
+version = "0.2.89"
+
+[target."cfg(target_os = \"emscripten\")".dependencies.wasm-bindgen-futures]
+version = "0.4.33"
+
+[target."cfg(target_os = \"emscripten\")".dependencies.web-sys]
+version = "0.3.35"
+features = [
+    "AudioContext",
+    "AudioContextOptions",
+    "AudioBuffer",
+    "AudioBufferSourceNode",
+    "AudioNode",
+    "AudioDestinationNode",
+    "Window",
+    "AudioContextState",
+]
+
+[target."cfg(target_os = \"ios\")".dependencies.coreaudio-rs]
+version = "0.11"
+features = [
+    "audio_unit",
+    "core_audio",
+    "audio_toolbox",
+]
+default-features = false
+
+[target."cfg(target_os = \"macos\")".dependencies.coreaudio-rs]
+version = "0.11"
+features = [
+    "audio_unit",
+    "core_audio",
+]
+default-features = false
+
+[target."cfg(target_os = \"windows\")".dependencies.asio-sys]
+version = "0.2"
+optional = true
+
+[target."cfg(target_os = \"windows\")".dependencies.num-traits]
+version = "0.2.6"
+optional = true
+
+[target."cfg(target_os = \"windows\")".dependencies.windows]
+version = "0.54.0"
+features = [
+    "Win32_Media_Audio",
+    "Win32_Foundation",
+    "Win32_Devices_Properties",
+    "Win32_Media_KernelStreaming",
+    "Win32_System_Com_StructuredStorage",
+    "Win32_System_Threading",
+    "Win32_Security",
+    "Win32_System_SystemServices",
+    "Win32_System_Variant",
+    "Win32_Media_Multimedia",
+    "Win32_UI_Shell_PropertiesSystem",
+]

src-tauri/patches/cpal-0.15.3/Cargo.toml.orig

@@ -0,0 +1,95 @@
+[package]
+name = "cpal"
+version = "0.15.3"
+description = "Low-level cross-platform audio I/O library in pure Rust."
+repository = "https://github.com/rustaudio/cpal"
+documentation = "https://docs.rs/cpal"
+license = "Apache-2.0"
+keywords = ["audio", "sound"]
+edition = "2021"
+rust-version = "1.70"
+
+[features]
+asio = ["asio-sys", "num-traits"] # Only available on Windows. See README for setup instructions.
+oboe-shared-stdcxx = ["oboe/shared-stdcxx"] # Only available on Android. See README for what it does.
+
+[dependencies]
+dasp_sample = "0.11"
+
+[dev-dependencies]
+anyhow = "1.0"
+hound = "3.5"
+ringbuf = "0.3"
+clap = { version = "4.0", features = ["derive"] }
+
+[target.'cfg(target_os = "android")'.dev-dependencies]
+ndk-glue = "0.7"
+
+[target.'cfg(target_os = "windows")'.dependencies]
+windows = { version = "0.54.0", features = [
+    "Win32_Media_Audio",
+    "Win32_Foundation",
+    "Win32_Devices_Properties",
+    "Win32_Media_KernelStreaming",
+    "Win32_System_Com_StructuredStorage",
+    "Win32_System_Threading",
+    "Win32_Security",
+    "Win32_System_SystemServices",
+    "Win32_System_Variant",
+    "Win32_Media_Multimedia",
+    "Win32_UI_Shell_PropertiesSystem"
+]}
+asio-sys = { version = "0.2", path = "asio-sys", optional = true }
+num-traits = { version = "0.2.6", optional = true }
+
+[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd"))'.dependencies]
+alsa = "0.9"
+libc = "0.2"
+jack = { version = "0.11", optional = true }
+
+[target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
+core-foundation-sys = "0.8.2" # For linking to CoreFoundation.framework and handling device name `CFString`s.
+mach2 = "0.4" # For access to mach_timebase type.
+
+[target.'cfg(target_os = "macos")'.dependencies]
+coreaudio-rs = { version = "0.11", default-features = false, features = ["audio_unit", "core_audio"] }
+
+[target.'cfg(target_os = "ios")'.dependencies]
+coreaudio-rs = { version = "0.11", default-features = false, features = ["audio_unit", "core_audio", "audio_toolbox"] }
+
+[target.'cfg(target_os = "emscripten")'.dependencies]
+wasm-bindgen = { version = "0.2.89" }
+wasm-bindgen-futures = "0.4.33"
+js-sys = { version = "0.3.35" }
+web-sys = { version = "0.3.35", features = [ "AudioContext", "AudioContextOptions", "AudioBuffer", "AudioBufferSourceNode", "AudioNode",  "AudioDestinationNode", "Window", "AudioContextState"] }
+
+[target.'cfg(all(target_arch = "wasm32", target_os = "unknown"))'.dependencies]
+wasm-bindgen = { version = "0.2.58", optional = true }
+js-sys = { version = "0.3.35" }
+web-sys = { version = "0.3.35", features = [ "AudioContext", "AudioContextOptions", "AudioBuffer", "AudioBufferSourceNode", "AudioNode",  "AudioDestinationNode", "Window", "AudioContextState"] }
+
+[target.'cfg(target_os = "android")'.dependencies]
+oboe = { version = "0.6", features = [ "java-interface" ] }
+ndk = { version = "0.8", default-features = false }
+ndk-context = "0.1"
+jni = "0.21"
+
+[[example]]
+name = "android"
+path = "examples/android.rs"
+crate-type = ["cdylib"]
+
+[[example]]
+name = "beep"
+
+[[example]]
+name = "enumerate"
+
+[[example]]
+name = "feedback"
+
+[[example]]
+name = "record_wav"
+
+[[example]]
+name = "synth_tones"

src-tauri/patches/cpal-0.15.3/Cross.toml

@@ -0,0 +1,7 @@
+[target.armv7-unknown-linux-gnueabihf]
+image = "cross/cpal_armv7:v1"
+
+[target.armv7-unknown-linux-gnueabihf.env]
+passthrough = [
+    "RUSTFLAGS",
+]

src-tauri/patches/cpal-0.15.3/Dockerfile

@@ -0,0 +1,9 @@
+FROM rustembedded/cross:armv7-unknown-linux-gnueabihf
+
+ENV PKG_CONFIG_ALLOW_CROSS 1
+ENV PKG_CONFIG_PATH /usr/lib/arm-linux-gnueabihf/pkgconfig/
+
+RUN dpkg --add-architecture armhf && \
+    apt-get update && \
+    apt-get install libasound2-dev:armhf -y && \
+    apt-get install libjack-jackd2-dev:armhf libjack-jackd2-0:armhf -y \

src-tauri/patches/cpal-0.15.3/LICENSE

@@ -0,0 +1,201 @@
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src-tauri/patches/cpal-0.15.3/README.md

@@ -0,0 +1,142 @@
+# CPAL - Cross-Platform Audio Library
+
+[![Actions Status](https://github.com/RustAudio/cpal/workflows/cpal/badge.svg)](https://github.com/RustAudio/cpal/actions)
+[![Crates.io](https://img.shields.io/crates/v/cpal.svg)](https://crates.io/crates/cpal) [![docs.rs](https://docs.rs/cpal/badge.svg)](https://docs.rs/cpal/)
+
+Low-level library for audio input and output in pure Rust.
+
+This library currently supports the following:
+
+- Enumerate supported audio hosts.
+- Enumerate all available audio devices.
+- Get the current default input and output devices.
+- Enumerate known supported input and output stream formats for a device.
+- Get the current default input and output stream formats for a device.
+- Build and run input and output PCM streams on a chosen device with a given stream format.
+
+Currently, supported hosts include:
+
+- Linux (via ALSA or JACK)
+- Windows (via WASAPI by default, see ASIO instructions below)
+- macOS (via CoreAudio)
+- iOS (via CoreAudio)
+- Android (via Oboe)
+- Emscripten
+
+Note that on Linux, the ALSA development files are required. These are provided
+as part of the `libasound2-dev` package on Debian and Ubuntu distributions and
+`alsa-lib-devel` on Fedora.
+
+## Compiling for Web Assembly
+
+If you are interested in using CPAL with WASM, please see [this guide](https://github.com/RustAudio/cpal/wiki/Setting-up-a-new-CPAL-WASM-project) in our Wiki which walks through setting up a new project from scratch.
+
+## Feature flags for audio backends
+
+Some audio backends are optional and will only be compiled with a [feature flag](https://doc.rust-lang.org/cargo/reference/features.html).
+
+- JACK (on Linux): `jack`
+- ASIO (on Windows): `asio`
+
+Oboe can either use a shared or static runtime. The static runtime is used by default, but activating the
+`oboe-shared-stdcxx` feature makes it use the shared runtime, which requires `libc++_shared.so` from the Android NDK to
+be present during execution.
+
+## ASIO on Windows
+
+[ASIO](https://en.wikipedia.org/wiki/Audio_Stream_Input/Output) is an audio
+driver protocol by Steinberg. While it is available on multiple operating
+systems, it is most commonly used on Windows to work around limitations of
+WASAPI including access to large numbers of channels and lower-latency audio
+processing.
+
+CPAL allows for using the ASIO SDK as the audio host on Windows instead of
+WASAPI.
+
+### Locating the ASIO SDK
+
+The location of ASIO SDK is exposed to CPAL by setting the `CPAL_ASIO_DIR` environment variable.
+
+The build script will try to find the ASIO SDK by following these steps in order:
+
+1. Check if `CPAL_ASIO_DIR` is set and if so use the path to point to the SDK.
+2. Check if the ASIO SDK is already installed in the temporary directory, if so use that and set the path of `CPAL_ASIO_DIR` to the output of `std::env::temp_dir().join("asio_sdk")`.
+3. If the ASIO SDK is not already installed, download it from <https://www.steinberg.net/asiosdk> and install it in the temporary directory. The path of `CPAL_ASIO_DIR` will be set to the output of `std::env::temp_dir().join("asio_sdk")`.
+
+In an ideal situation you don't need to worry about this step.
+
+### Preparing the build environment
+
+1. `bindgen`, the library used to generate bindings to the C++ SDK, requires
+   clang. **Download and install LLVM** from
+   [here](http://releases.llvm.org/download.html) under the "Pre-Built Binaries"
+   section. The version as of writing this is 17.0.1.
+2. Add the LLVM `bin` directory to a `LIBCLANG_PATH` environment variable. If
+   you installed LLVM to the default directory, this should work in the command
+   prompt:
+   ```
+   setx LIBCLANG_PATH "C:\Program Files\LLVM\bin"
+   ```
+3. If you don't have any ASIO devices or drivers available, you can [**download
+   and install ASIO4ALL**](http://www.asio4all.org/). Be sure to enable the
+   "offline" feature during installation despite what the installer says about
+   it being useless.
+4. Our build script assumes that Microsoft Visual Studio is installed if the host OS for compilation is Windows. The script will try to find `vcvarsall.bat`
+   and execute it with the right host and target machine architecture regardless of the Microsoft Visual Studio version.
+   If there are any errors encountered in this process which is unlikely,
+   you may find the `vcvarsall.bat` manually and execute it with your machine architecture as an argument.
+   The script will detect this and skip the step.
+
+   A manually executed command example for 64 bit machines:
+
+   ```
+   "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" amd64
+   ```
+
+   For more information please refer to the documentation of [`vcvarsall.bat``](https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line?view=msvc-160#vcvarsall-syntax).
+
+5. Select the ASIO host at the start of our program with the following code:
+
+   ```rust
+   let host;
+   #[cfg(target_os = "windows")]
+   {
+      host = cpal::host_from_id(cpal::HostId::Asio).expect("failed to initialise ASIO host");
+   }
+   ```
+
+   If you run into compilations errors produced by `asio-sys` or `bindgen`, make
+   sure that `CPAL_ASIO_DIR` is set correctly and try `cargo clean`.
+
+6. Make sure to enable the `asio` feature when building CPAL:
+
+   ```
+   cargo build --features "asio"
+   ```
+
+   or if you are using CPAL as a dependency in a downstream project, enable the
+   feature like this:
+
+   ```toml
+   cpal = { version = "*", features = ["asio"] }
+   ```
+
+_Updated as of ASIO version 2.3.3._
+
+### Cross compilation
+
+When Windows is the host and the target OS, the build script of `asio-sys` supports all cross compilation targets
+which are supported by the MSVC compiler. An exhaustive list of combinations could be found [here](https://docs.microsoft.com/en-us/cpp/build/building-on-the-command-line?view=msvc-160#vcvarsall-syntax) with the addition of undocumented `arm64`, `arm64_x86`, `arm64_amd64` and `arm64_arm` targets. (5.11.2023)
+
+It is also possible to compile Windows applications with ASIO support on Linux and macOS.
+
+For both platforms the common way to do this is to use the [MinGW-w64](https://www.mingw-w64.org/) toolchain.
+
+Make sure that you have included the `MinGW-w64` include directory in your `CPLUS_INCLUDE_PATH` environment variable.
+Make sure that LLVM is installed and include directory is also included in your `CPLUS_INCLUDE_PATH` environment variable.
+
+Example for macOS for the target of `x86_64-pc-windows-gnu` where `mingw-w64` is installed via brew:
+
+```
+export CPLUS_INCLUDE_PATH="$CPLUS_INCLUDE_PATH:/opt/homebrew/Cellar/mingw-w64/11.0.1/toolchain-x86_64/x86_64-w64-mingw32/include"
+```

src-tauri/patches/cpal-0.15.3/build.rs

@@ -0,0 +1,14 @@
+use std::env;
+
+const CPAL_ASIO_DIR: &str = "CPAL_ASIO_DIR";
+
+fn main() {
+    println!("cargo:rerun-if-env-changed={}", CPAL_ASIO_DIR);
+
+    // If ASIO directory isn't set silently return early
+    // otherwise set the asio config flag
+    match env::var(CPAL_ASIO_DIR) {
+        Err(_) => {}
+        Ok(_) => println!("cargo:rustc-cfg=asio"),
+    };
+}

src-tauri/patches/cpal-0.15.3/examples/android.rs

@@ -0,0 +1,82 @@
+#![allow(dead_code)]
+
+extern crate anyhow;
+extern crate cpal;
+
+use cpal::{
+    traits::{DeviceTrait, HostTrait, StreamTrait},
+    SizedSample,
+};
+use cpal::{FromSample, Sample};
+
+#[cfg_attr(target_os = "android", ndk_glue::main(backtrace = "full"))]
+fn main() {
+    let host = cpal::default_host();
+
+    let device = host
+        .default_output_device()
+        .expect("failed to find output device");
+
+    let config = device.default_output_config().unwrap();
+
+    match config.sample_format() {
+        cpal::SampleFormat::I8 => run::<i8>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::I16 => run::<i16>(&device, &config.into()).unwrap(),
+        // cpal::SampleFormat::I24 => run::<I24>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::I32 => run::<i32>(&device, &config.into()).unwrap(),
+        // cpal::SampleFormat::I48 => run::<I48>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::I64 => run::<i64>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::U8 => run::<u8>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::U16 => run::<u16>(&device, &config.into()).unwrap(),
+        // cpal::SampleFormat::U24 => run::<U24>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::U32 => run::<u32>(&device, &config.into()).unwrap(),
+        // cpal::SampleFormat::U48 => run::<U48>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::U64 => run::<u64>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::F32 => run::<f32>(&device, &config.into()).unwrap(),
+        cpal::SampleFormat::F64 => run::<f64>(&device, &config.into()).unwrap(),
+        sample_format => panic!("Unsupported sample format '{sample_format}'"),
+    }
+}
+
+fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error>
+where
+    T: SizedSample + FromSample<f32>,
+{
+    let sample_rate = config.sample_rate.0 as f32;
+    let channels = config.channels as usize;
+
+    // Produce a sinusoid of maximum amplitude.
+    let mut sample_clock = 0f32;
+    let mut next_value = move || {
+        sample_clock = (sample_clock + 1.0) % sample_rate;
+        (sample_clock * 440.0 * 2.0 * std::f32::consts::PI / sample_rate).sin()
+    };
+
+    let err_fn = |err| eprintln!("an error occurred on stream: {}", err);
+
+    let stream = device.build_output_stream(
+        config,
+        move |data: &mut [T], _: &cpal::OutputCallbackInfo| {
+            write_data(data, channels, &mut next_value)
+        },
+        err_fn,
+        None,
+    )?;
+    stream.play()?;
+
+    std::thread::sleep(std::time::Duration::from_millis(1000));
+
+    Ok(())
+}
+
+fn write_data<T>(output: &mut [T], channels: usize, next_sample: &mut dyn FnMut() -> f32)
+where
+    T: Sample + FromSample<f32>,
+{
+    for frame in output.chunks_mut(channels) {
+        let value: T = T::from_sample(next_sample());
+        for sample in frame.iter_mut() {
+            *sample = value;
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/examples/beep.rs

@@ -0,0 +1,138 @@
+use clap::Parser;
+use cpal::{
+    traits::{DeviceTrait, HostTrait, StreamTrait},
+    FromSample, Sample, SizedSample,
+};
+
+#[derive(Parser, Debug)]
+#[command(version, about = "CPAL beep example", long_about = None)]
+struct Opt {
+    /// The audio device to use
+    #[arg(short, long, default_value_t = String::from("default"))]
+    device: String,
+
+    /// Use the JACK host
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    #[arg(short, long)]
+    #[allow(dead_code)]
+    jack: bool,
+}
+
+fn main() -> anyhow::Result<()> {
+    let opt = Opt::parse();
+
+    // Conditionally compile with jack if the feature is specified.
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    // Manually check for flags. Can be passed through cargo with -- e.g.
+    // cargo run --release --example beep --features jack -- --jack
+    let host = if opt.jack {
+        cpal::host_from_id(cpal::available_hosts()
+            .into_iter()
+            .find(|id| *id == cpal::HostId::Jack)
+            .expect(
+                "make sure --features jack is specified. only works on OSes where jack is available",
+            )).expect("jack host unavailable")
+    } else {
+        cpal::default_host()
+    };
+
+    #[cfg(any(
+        not(any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        )),
+        not(feature = "jack")
+    ))]
+    let host = cpal::default_host();
+
+    let device = if opt.device == "default" {
+        host.default_output_device()
+    } else {
+        host.output_devices()?
+            .find(|x| x.name().map(|y| y == opt.device).unwrap_or(false))
+    }
+    .expect("failed to find output device");
+    println!("Output device: {}", device.name()?);
+
+    let config = device.default_output_config().unwrap();
+    println!("Default output config: {:?}", config);
+
+    match config.sample_format() {
+        cpal::SampleFormat::I8 => run::<i8>(&device, &config.into()),
+        cpal::SampleFormat::I16 => run::<i16>(&device, &config.into()),
+        // cpal::SampleFormat::I24 => run::<I24>(&device, &config.into()),
+        cpal::SampleFormat::I32 => run::<i32>(&device, &config.into()),
+        // cpal::SampleFormat::I48 => run::<I48>(&device, &config.into()),
+        cpal::SampleFormat::I64 => run::<i64>(&device, &config.into()),
+        cpal::SampleFormat::U8 => run::<u8>(&device, &config.into()),
+        cpal::SampleFormat::U16 => run::<u16>(&device, &config.into()),
+        // cpal::SampleFormat::U24 => run::<U24>(&device, &config.into()),
+        cpal::SampleFormat::U32 => run::<u32>(&device, &config.into()),
+        // cpal::SampleFormat::U48 => run::<U48>(&device, &config.into()),
+        cpal::SampleFormat::U64 => run::<u64>(&device, &config.into()),
+        cpal::SampleFormat::F32 => run::<f32>(&device, &config.into()),
+        cpal::SampleFormat::F64 => run::<f64>(&device, &config.into()),
+        sample_format => panic!("Unsupported sample format '{sample_format}'"),
+    }
+}
+
+pub fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error>
+where
+    T: SizedSample + FromSample<f32>,
+{
+    let sample_rate = config.sample_rate.0 as f32;
+    let channels = config.channels as usize;
+
+    // Produce a sinusoid of maximum amplitude.
+    let mut sample_clock = 0f32;
+    let mut next_value = move || {
+        sample_clock = (sample_clock + 1.0) % sample_rate;
+        (sample_clock * 440.0 * 2.0 * std::f32::consts::PI / sample_rate).sin()
+    };
+
+    let err_fn = |err| eprintln!("an error occurred on stream: {}", err);
+
+    let stream = device.build_output_stream(
+        config,
+        move |data: &mut [T], _: &cpal::OutputCallbackInfo| {
+            write_data(data, channels, &mut next_value)
+        },
+        err_fn,
+        None,
+    )?;
+    stream.play()?;
+
+    std::thread::sleep(std::time::Duration::from_millis(1000));
+
+    Ok(())
+}
+
+fn write_data<T>(output: &mut [T], channels: usize, next_sample: &mut dyn FnMut() -> f32)
+where
+    T: Sample + FromSample<f32>,
+{
+    for frame in output.chunks_mut(channels) {
+        let value: T = T::from_sample(next_sample());
+        for sample in frame.iter_mut() {
+            *sample = value;
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/examples/enumerate.rs

@@ -0,0 +1,74 @@
+extern crate anyhow;
+extern crate cpal;
+
+use cpal::traits::{DeviceTrait, HostTrait};
+
+fn main() -> Result<(), anyhow::Error> {
+    println!("Supported hosts:\n  {:?}", cpal::ALL_HOSTS);
+    let available_hosts = cpal::available_hosts();
+    println!("Available hosts:\n  {:?}", available_hosts);
+
+    for host_id in available_hosts {
+        println!("{}", host_id.name());
+        let host = cpal::host_from_id(host_id)?;
+
+        let default_in = host.default_input_device().map(|e| e.name().unwrap());
+        let default_out = host.default_output_device().map(|e| e.name().unwrap());
+        println!("  Default Input Device:\n    {:?}", default_in);
+        println!("  Default Output Device:\n    {:?}", default_out);
+
+        let devices = host.devices()?;
+        println!("  Devices: ");
+        for (device_index, device) in devices.enumerate() {
+            println!("  {}. \"{}\"", device_index + 1, device.name()?);
+
+            // Input configs
+            if let Ok(conf) = device.default_input_config() {
+                println!("    Default input stream config:\n      {:?}", conf);
+            }
+            let input_configs = match device.supported_input_configs() {
+                Ok(f) => f.collect(),
+                Err(e) => {
+                    println!("    Error getting supported input configs: {:?}", e);
+                    Vec::new()
+                }
+            };
+            if !input_configs.is_empty() {
+                println!("    All supported input stream configs:");
+                for (config_index, config) in input_configs.into_iter().enumerate() {
+                    println!(
+                        "      {}.{}. {:?}",
+                        device_index + 1,
+                        config_index + 1,
+                        config
+                    );
+                }
+            }
+
+            // Output configs
+            if let Ok(conf) = device.default_output_config() {
+                println!("    Default output stream config:\n      {:?}", conf);
+            }
+            let output_configs = match device.supported_output_configs() {
+                Ok(f) => f.collect(),
+                Err(e) => {
+                    println!("    Error getting supported output configs: {:?}", e);
+                    Vec::new()
+                }
+            };
+            if !output_configs.is_empty() {
+                println!("    All supported output stream configs:");
+                for (config_index, config) in output_configs.into_iter().enumerate() {
+                    println!(
+                        "      {}.{}. {:?}",
+                        device_index + 1,
+                        config_index + 1,
+                        config
+                    );
+                }
+            }
+        }
+    }
+
+    Ok(())
+}

src-tauri/patches/cpal-0.15.3/examples/feedback.rs

@@ -0,0 +1,174 @@
+//! Feeds back the input stream directly into the output stream.
+//!
+//! Assumes that the input and output devices can use the same stream configuration and that they
+//! support the f32 sample format.
+//!
+//! Uses a delay of `LATENCY_MS` milliseconds in case the default input and output streams are not
+//! precisely synchronised.
+
+use clap::Parser;
+use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+use ringbuf::HeapRb;
+
+#[derive(Parser, Debug)]
+#[command(version, about = "CPAL feedback example", long_about = None)]
+struct Opt {
+    /// The input audio device to use
+    #[arg(short, long, value_name = "IN", default_value_t = String::from("default"))]
+    input_device: String,
+
+    /// The output audio device to use
+    #[arg(short, long, value_name = "OUT", default_value_t = String::from("default"))]
+    output_device: String,
+
+    /// Specify the delay between input and output
+    #[arg(short, long, value_name = "DELAY_MS", default_value_t = 150.0)]
+    latency: f32,
+
+    /// Use the JACK host
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    #[arg(short, long)]
+    #[allow(dead_code)]
+    jack: bool,
+}
+
+fn main() -> anyhow::Result<()> {
+    let opt = Opt::parse();
+
+    // Conditionally compile with jack if the feature is specified.
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    // Manually check for flags. Can be passed through cargo with -- e.g.
+    // cargo run --release --example beep --features jack -- --jack
+    let host = if opt.jack {
+        cpal::host_from_id(cpal::available_hosts()
+            .into_iter()
+            .find(|id| *id == cpal::HostId::Jack)
+            .expect(
+                "make sure --features jack is specified. only works on OSes where jack is available",
+            )).expect("jack host unavailable")
+    } else {
+        cpal::default_host()
+    };
+
+    #[cfg(any(
+        not(any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        )),
+        not(feature = "jack")
+    ))]
+    let host = cpal::default_host();
+
+    // Find devices.
+    let input_device = if opt.input_device == "default" {
+        host.default_input_device()
+    } else {
+        host.input_devices()?
+            .find(|x| x.name().map(|y| y == opt.input_device).unwrap_or(false))
+    }
+    .expect("failed to find input device");
+
+    let output_device = if opt.output_device == "default" {
+        host.default_output_device()
+    } else {
+        host.output_devices()?
+            .find(|x| x.name().map(|y| y == opt.output_device).unwrap_or(false))
+    }
+    .expect("failed to find output device");
+
+    println!("Using input device: \"{}\"", input_device.name()?);
+    println!("Using output device: \"{}\"", output_device.name()?);
+
+    // We'll try and use the same configuration between streams to keep it simple.
+    let config: cpal::StreamConfig = input_device.default_input_config()?.into();
+
+    // Create a delay in case the input and output devices aren't synced.
+    let latency_frames = (opt.latency / 1_000.0) * config.sample_rate.0 as f32;
+    let latency_samples = latency_frames as usize * config.channels as usize;
+
+    // The buffer to share samples
+    let ring = HeapRb::<f32>::new(latency_samples * 2);
+    let (mut producer, mut consumer) = ring.split();
+
+    // Fill the samples with 0.0 equal to the length of the delay.
+    for _ in 0..latency_samples {
+        // The ring buffer has twice as much space as necessary to add latency here,
+        // so this should never fail
+        producer.push(0.0).unwrap();
+    }
+
+    let input_data_fn = move |data: &[f32], _: &cpal::InputCallbackInfo| {
+        let mut output_fell_behind = false;
+        for &sample in data {
+            if producer.push(sample).is_err() {
+                output_fell_behind = true;
+            }
+        }
+        if output_fell_behind {
+            eprintln!("output stream fell behind: try increasing latency");
+        }
+    };
+
+    let output_data_fn = move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
+        let mut input_fell_behind = false;
+        for sample in data {
+            *sample = match consumer.pop() {
+                Some(s) => s,
+                None => {
+                    input_fell_behind = true;
+                    0.0
+                }
+            };
+        }
+        if input_fell_behind {
+            eprintln!("input stream fell behind: try increasing latency");
+        }
+    };
+
+    // Build streams.
+    println!(
+        "Attempting to build both streams with f32 samples and `{:?}`.",
+        config
+    );
+    let input_stream = input_device.build_input_stream(&config, input_data_fn, err_fn, None)?;
+    let output_stream = output_device.build_output_stream(&config, output_data_fn, err_fn, None)?;
+    println!("Successfully built streams.");
+
+    // Play the streams.
+    println!(
+        "Starting the input and output streams with `{}` milliseconds of latency.",
+        opt.latency
+    );
+    input_stream.play()?;
+    output_stream.play()?;
+
+    // Run for 3 seconds before closing.
+    println!("Playing for 3 seconds... ");
+    std::thread::sleep(std::time::Duration::from_secs(3));
+    drop(input_stream);
+    drop(output_stream);
+    println!("Done!");
+    Ok(())
+}
+
+fn err_fn(err: cpal::StreamError) {
+    eprintln!("an error occurred on stream: {}", err);
+}

src-tauri/patches/cpal-0.15.3/examples/record_wav.rs

@@ -0,0 +1,177 @@
+//! Records a WAV file (roughly 3 seconds long) using the default input device and config.
+//!
+//! The input data is recorded to "$CARGO_MANIFEST_DIR/recorded.wav".
+
+use clap::Parser;
+use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+use cpal::{FromSample, Sample};
+use std::fs::File;
+use std::io::BufWriter;
+use std::sync::{Arc, Mutex};
+
+#[derive(Parser, Debug)]
+#[command(version, about = "CPAL record_wav example", long_about = None)]
+struct Opt {
+    /// The audio device to use
+    #[arg(short, long, default_value_t = String::from("default"))]
+    device: String,
+
+    /// Use the JACK host
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    #[arg(short, long)]
+    #[allow(dead_code)]
+    jack: bool,
+}
+
+fn main() -> Result<(), anyhow::Error> {
+    let opt = Opt::parse();
+
+    // Conditionally compile with jack if the feature is specified.
+    #[cfg(all(
+        any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        ),
+        feature = "jack"
+    ))]
+    // Manually check for flags. Can be passed through cargo with -- e.g.
+    // cargo run --release --example beep --features jack -- --jack
+    let host = if opt.jack {
+        cpal::host_from_id(cpal::available_hosts()
+            .into_iter()
+            .find(|id| *id == cpal::HostId::Jack)
+            .expect(
+                "make sure --features jack is specified. only works on OSes where jack is available",
+            )).expect("jack host unavailable")
+    } else {
+        cpal::default_host()
+    };
+
+    #[cfg(any(
+        not(any(
+            target_os = "linux",
+            target_os = "dragonfly",
+            target_os = "freebsd",
+            target_os = "netbsd"
+        )),
+        not(feature = "jack")
+    ))]
+    let host = cpal::default_host();
+
+    // Set up the input device and stream with the default input config.
+    let device = if opt.device == "default" {
+        host.default_input_device()
+    } else {
+        host.input_devices()?
+            .find(|x| x.name().map(|y| y == opt.device).unwrap_or(false))
+    }
+    .expect("failed to find input device");
+
+    println!("Input device: {}", device.name()?);
+
+    let config = device
+        .default_input_config()
+        .expect("Failed to get default input config");
+    println!("Default input config: {:?}", config);
+
+    // The WAV file we're recording to.
+    const PATH: &str = concat!(env!("CARGO_MANIFEST_DIR"), "/recorded.wav");
+    let spec = wav_spec_from_config(&config);
+    let writer = hound::WavWriter::create(PATH, spec)?;
+    let writer = Arc::new(Mutex::new(Some(writer)));
+
+    // A flag to indicate that recording is in progress.
+    println!("Begin recording...");
+
+    // Run the input stream on a separate thread.
+    let writer_2 = writer.clone();
+
+    let err_fn = move |err| {
+        eprintln!("an error occurred on stream: {}", err);
+    };
+
+    let stream = match config.sample_format() {
+        cpal::SampleFormat::I8 => device.build_input_stream(
+            &config.into(),
+            move |data, _: &_| write_input_data::<i8, i8>(data, &writer_2),
+            err_fn,
+            None,
+        )?,
+        cpal::SampleFormat::I16 => device.build_input_stream(
+            &config.into(),
+            move |data, _: &_| write_input_data::<i16, i16>(data, &writer_2),
+            err_fn,
+            None,
+        )?,
+        cpal::SampleFormat::I32 => device.build_input_stream(
+            &config.into(),
+            move |data, _: &_| write_input_data::<i32, i32>(data, &writer_2),
+            err_fn,
+            None,
+        )?,
+        cpal::SampleFormat::F32 => device.build_input_stream(
+            &config.into(),
+            move |data, _: &_| write_input_data::<f32, f32>(data, &writer_2),
+            err_fn,
+            None,
+        )?,
+        sample_format => {
+            return Err(anyhow::Error::msg(format!(
+                "Unsupported sample format '{sample_format}'"
+            )))
+        }
+    };
+
+    stream.play()?;
+
+    // Let recording go for roughly three seconds.
+    std::thread::sleep(std::time::Duration::from_secs(3));
+    drop(stream);
+    writer.lock().unwrap().take().unwrap().finalize()?;
+    println!("Recording {} complete!", PATH);
+    Ok(())
+}
+
+fn sample_format(format: cpal::SampleFormat) -> hound::SampleFormat {
+    if format.is_float() {
+        hound::SampleFormat::Float
+    } else {
+        hound::SampleFormat::Int
+    }
+}
+
+fn wav_spec_from_config(config: &cpal::SupportedStreamConfig) -> hound::WavSpec {
+    hound::WavSpec {
+        channels: config.channels() as _,
+        sample_rate: config.sample_rate().0 as _,
+        bits_per_sample: (config.sample_format().sample_size() * 8) as _,
+        sample_format: sample_format(config.sample_format()),
+    }
+}
+
+type WavWriterHandle = Arc<Mutex<Option<hound::WavWriter<BufWriter<File>>>>>;
+
+fn write_input_data<T, U>(input: &[T], writer: &WavWriterHandle)
+where
+    T: Sample,
+    U: Sample + hound::Sample + FromSample<T>,
+{
+    if let Ok(mut guard) = writer.try_lock() {
+        if let Some(writer) = guard.as_mut() {
+            for &sample in input.iter() {
+                let sample: U = U::from_sample(sample);
+                writer.write_sample(sample).ok();
+            }
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/examples/synth_tones.rs

@@ -0,0 +1,191 @@
+/* This example expose parameter to pass generator of sample.
+Good starting point for integration of cpal into your application.
+*/
+
+extern crate anyhow;
+extern crate clap;
+extern crate cpal;
+
+use cpal::{
+    traits::{DeviceTrait, HostTrait, StreamTrait},
+    SizedSample,
+};
+use cpal::{FromSample, Sample};
+
+fn main() -> anyhow::Result<()> {
+    let stream = stream_setup_for()?;
+    stream.play()?;
+    std::thread::sleep(std::time::Duration::from_millis(4000));
+    Ok(())
+}
+
+pub enum Waveform {
+    Sine,
+    Square,
+    Saw,
+    Triangle,
+}
+
+pub struct Oscillator {
+    pub sample_rate: f32,
+    pub waveform: Waveform,
+    pub current_sample_index: f32,
+    pub frequency_hz: f32,
+}
+
+impl Oscillator {
+    fn advance_sample(&mut self) {
+        self.current_sample_index = (self.current_sample_index + 1.0) % self.sample_rate;
+    }
+
+    fn set_waveform(&mut self, waveform: Waveform) {
+        self.waveform = waveform;
+    }
+
+    fn calculate_sine_output_from_freq(&self, freq: f32) -> f32 {
+        let two_pi = 2.0 * std::f32::consts::PI;
+        (self.current_sample_index * freq * two_pi / self.sample_rate).sin()
+    }
+
+    fn is_multiple_of_freq_above_nyquist(&self, multiple: f32) -> bool {
+        self.frequency_hz * multiple > self.sample_rate / 2.0
+    }
+
+    fn sine_wave(&mut self) -> f32 {
+        self.advance_sample();
+        self.calculate_sine_output_from_freq(self.frequency_hz)
+    }
+
+    fn generative_waveform(&mut self, harmonic_index_increment: i32, gain_exponent: f32) -> f32 {
+        self.advance_sample();
+        let mut output = 0.0;
+        let mut i = 1;
+        while !self.is_multiple_of_freq_above_nyquist(i as f32) {
+            let gain = 1.0 / (i as f32).powf(gain_exponent);
+            output += gain * self.calculate_sine_output_from_freq(self.frequency_hz * i as f32);
+            i += harmonic_index_increment;
+        }
+        output
+    }
+
+    fn square_wave(&mut self) -> f32 {
+        self.generative_waveform(2, 1.0)
+    }
+
+    fn saw_wave(&mut self) -> f32 {
+        self.generative_waveform(1, 1.0)
+    }
+
+    fn triangle_wave(&mut self) -> f32 {
+        self.generative_waveform(2, 2.0)
+    }
+
+    fn tick(&mut self) -> f32 {
+        match self.waveform {
+            Waveform::Sine => self.sine_wave(),
+            Waveform::Square => self.square_wave(),
+            Waveform::Saw => self.saw_wave(),
+            Waveform::Triangle => self.triangle_wave(),
+        }
+    }
+}
+
+pub fn stream_setup_for() -> Result<cpal::Stream, anyhow::Error>
+where
+{
+    let (_host, device, config) = host_device_setup()?;
+
+    match config.sample_format() {
+        cpal::SampleFormat::I8 => make_stream::<i8>(&device, &config.into()),
+        cpal::SampleFormat::I16 => make_stream::<i16>(&device, &config.into()),
+        cpal::SampleFormat::I32 => make_stream::<i32>(&device, &config.into()),
+        cpal::SampleFormat::I64 => make_stream::<i64>(&device, &config.into()),
+        cpal::SampleFormat::U8 => make_stream::<u8>(&device, &config.into()),
+        cpal::SampleFormat::U16 => make_stream::<u16>(&device, &config.into()),
+        cpal::SampleFormat::U32 => make_stream::<u32>(&device, &config.into()),
+        cpal::SampleFormat::U64 => make_stream::<u64>(&device, &config.into()),
+        cpal::SampleFormat::F32 => make_stream::<f32>(&device, &config.into()),
+        cpal::SampleFormat::F64 => make_stream::<f64>(&device, &config.into()),
+        sample_format => Err(anyhow::Error::msg(format!(
+            "Unsupported sample format '{sample_format}'"
+        ))),
+    }
+}
+
+pub fn host_device_setup(
+) -> Result<(cpal::Host, cpal::Device, cpal::SupportedStreamConfig), anyhow::Error> {
+    let host = cpal::default_host();
+
+    let device = host
+        .default_output_device()
+        .ok_or_else(|| anyhow::Error::msg("Default output device is not available"))?;
+    println!("Output device : {}", device.name()?);
+
+    let config = device.default_output_config()?;
+    println!("Default output config : {:?}", config);
+
+    Ok((host, device, config))
+}
+
+pub fn make_stream<T>(
+    device: &cpal::Device,
+    config: &cpal::StreamConfig,
+) -> Result<cpal::Stream, anyhow::Error>
+where
+    T: SizedSample + FromSample<f32>,
+{
+    let num_channels = config.channels as usize;
+    let mut oscillator = Oscillator {
+        waveform: Waveform::Sine,
+        sample_rate: config.sample_rate.0 as f32,
+        current_sample_index: 0.0,
+        frequency_hz: 440.0,
+    };
+    let err_fn = |err| eprintln!("Error building output sound stream: {}", err);
+
+    let time_at_start = std::time::Instant::now();
+    println!("Time at start: {:?}", time_at_start);
+
+    let stream = device.build_output_stream(
+        config,
+        move |output: &mut [T], _: &cpal::OutputCallbackInfo| {
+            // for 0-1s play sine, 1-2s play square, 2-3s play saw, 3-4s play triangle_wave
+            let time_since_start = std::time::Instant::now()
+                .duration_since(time_at_start)
+                .as_secs_f32();
+            if time_since_start < 1.0 {
+                oscillator.set_waveform(Waveform::Sine);
+            } else if time_since_start < 2.0 {
+                oscillator.set_waveform(Waveform::Triangle);
+            } else if time_since_start < 3.0 {
+                oscillator.set_waveform(Waveform::Square);
+            } else if time_since_start < 4.0 {
+                oscillator.set_waveform(Waveform::Saw);
+            } else {
+                oscillator.set_waveform(Waveform::Sine);
+            }
+            process_frame(output, &mut oscillator, num_channels)
+        },
+        err_fn,
+        None,
+    )?;
+
+    Ok(stream)
+}
+
+fn process_frame<SampleType>(
+    output: &mut [SampleType],
+    oscillator: &mut Oscillator,
+    num_channels: usize,
+) where
+    SampleType: Sample + FromSample<f32>,
+{
+    for frame in output.chunks_mut(num_channels) {
+        let value: SampleType = SampleType::from_sample(oscillator.tick());
+
+        // copy the same value to all channels
+        for sample in frame.iter_mut() {
+            *sample = value;
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/error.rs

@@ -0,0 +1,292 @@
+use std::error::Error;
+use std::fmt::{Display, Formatter};
+
+/// The requested host, although supported on this platform, is unavailable.
+#[derive(Copy, Clone, Debug)]
+pub struct HostUnavailable;
+
+impl Display for HostUnavailable {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        f.write_str("the requested host is unavailable")
+    }
+}
+
+impl Error for HostUnavailable {}
+
+/// Some error has occurred that is specific to the backend from which it was produced.
+///
+/// This error is often used as a catch-all in cases where:
+///
+/// - It is unclear exactly what error might be produced by the backend API.
+/// - It does not make sense to add a variant to the enclosing error type.
+/// - No error was expected to occur at all, but we return an error to avoid the possibility of a
+///   `panic!` caused by some unforeseen or unknown reason.
+///
+/// **Note:** If you notice a `BackendSpecificError` that you believe could be better handled in a
+/// cross-platform manner, please create an issue or submit a pull request with a patch that adds
+/// the necessary error variant to the appropriate error enum.
+#[derive(Clone, Debug)]
+pub struct BackendSpecificError {
+    pub description: String,
+}
+
+impl Display for BackendSpecificError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "A backend-specific error has occurred: {}",
+            self.description
+        )
+    }
+}
+
+impl Error for BackendSpecificError {}
+
+/// An error that might occur while attempting to enumerate the available devices on a system.
+#[derive(Clone, Debug)]
+pub enum DevicesError {
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for DevicesError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+        }
+    }
+}
+
+impl Error for DevicesError {}
+
+impl From<BackendSpecificError> for DevicesError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// An error that may occur while attempting to retrieve a device name.
+#[derive(Clone, Debug)]
+pub enum DeviceNameError {
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for DeviceNameError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+        }
+    }
+}
+
+impl Error for DeviceNameError {}
+
+impl From<BackendSpecificError> for DeviceNameError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// Error that can happen when enumerating the list of supported formats.
+#[derive(Debug)]
+pub enum SupportedStreamConfigsError {
+    /// The device no longer exists. This can happen if the device is disconnected while the
+    /// program is running.
+    DeviceNotAvailable,
+    /// We called something the C-Layer did not understand
+    InvalidArgument,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for SupportedStreamConfigsError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            Self::DeviceNotAvailable => f.write_str("The requested device is no longer available. For example, it has been unplugged."),
+            Self::InvalidArgument => f.write_str("Invalid argument passed to the backend. For example, this happens when trying to read capture capabilities when the device does not support it.")
+        }
+    }
+}
+
+impl Error for SupportedStreamConfigsError {}
+
+impl From<BackendSpecificError> for SupportedStreamConfigsError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// May occur when attempting to request the default input or output stream format from a [`Device`](crate::Device).
+#[derive(Debug)]
+pub enum DefaultStreamConfigError {
+    /// The device no longer exists. This can happen if the device is disconnected while the
+    /// program is running.
+    DeviceNotAvailable,
+    /// Returned if e.g. the default input format was requested on an output-only audio device.
+    StreamTypeNotSupported,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for DefaultStreamConfigError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            DefaultStreamConfigError::DeviceNotAvailable => f.write_str(
+                "The requested device is no longer available. For example, it has been unplugged.",
+            ),
+            DefaultStreamConfigError::StreamTypeNotSupported => {
+                f.write_str("The requested stream type is not supported by the device.")
+            }
+        }
+    }
+}
+
+impl Error for DefaultStreamConfigError {}
+
+impl From<BackendSpecificError> for DefaultStreamConfigError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+/// Error that can happen when creating a [`Stream`](crate::Stream).
+#[derive(Debug)]
+pub enum BuildStreamError {
+    /// The device no longer exists. This can happen if the device is disconnected while the
+    /// program is running.
+    DeviceNotAvailable,
+    /// The specified stream configuration is not supported.
+    StreamConfigNotSupported,
+    /// We called something the C-Layer did not understand
+    ///
+    /// On ALSA device functions called with a feature they do not support will yield this. E.g.
+    /// Trying to use capture capabilities on an output only format yields this.
+    InvalidArgument,
+    /// Occurs if adding a new Stream ID would cause an integer overflow.
+    StreamIdOverflow,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for BuildStreamError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            BuildStreamError::DeviceNotAvailable => f.write_str(
+                "The requested device is no longer available. For example, it has been unplugged.",
+            ),
+            BuildStreamError::StreamConfigNotSupported => {
+                f.write_str("The requested stream configuration is not supported by the device.")
+            }
+            BuildStreamError::InvalidArgument => f.write_str(
+                "The requested device does not support this capability (invalid argument)",
+            ),
+            BuildStreamError::StreamIdOverflow => {
+                f.write_str("Adding a new stream ID would cause an overflow")
+            }
+        }
+    }
+}
+
+impl Error for BuildStreamError {}
+
+impl From<BackendSpecificError> for BuildStreamError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// Errors that might occur when calling [`Stream::play()`](crate::traits::StreamTrait::play).
+///
+/// As of writing this, only macOS may immediately return an error while calling this method. This
+/// is because both the alsa and wasapi backends only enqueue these commands and do not process
+/// them immediately.
+#[derive(Debug)]
+pub enum PlayStreamError {
+    /// The device associated with the stream is no longer available.
+    DeviceNotAvailable,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for PlayStreamError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            PlayStreamError::DeviceNotAvailable => {
+                f.write_str("the device associated with the stream is no longer available")
+            }
+        }
+    }
+}
+
+impl Error for PlayStreamError {}
+
+impl From<BackendSpecificError> for PlayStreamError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// Errors that might occur when calling [`Stream::pause()`](crate::traits::StreamTrait::pause).
+///
+/// As of writing this, only macOS may immediately return an error while calling this method. This
+/// is because both the alsa and wasapi backends only enqueue these commands and do not process
+/// them immediately.
+#[derive(Debug)]
+pub enum PauseStreamError {
+    /// The device associated with the stream is no longer available.
+    DeviceNotAvailable,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for PauseStreamError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            PauseStreamError::DeviceNotAvailable => {
+                f.write_str("the device associated with the stream is no longer available")
+            }
+        }
+    }
+}
+
+impl Error for PauseStreamError {}
+
+impl From<BackendSpecificError> for PauseStreamError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}
+
+/// Errors that might occur while a stream is running.
+#[derive(Debug)]
+pub enum StreamError {
+    /// The device no longer exists. This can happen if the device is disconnected while the
+    /// program is running.
+    DeviceNotAvailable,
+    /// See the [`BackendSpecificError`] docs for more information about this error variant.
+    BackendSpecific { err: BackendSpecificError },
+}
+
+impl Display for StreamError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::BackendSpecific { err } => err.fmt(f),
+            StreamError::DeviceNotAvailable => f.write_str(
+                "The requested device is no longer available. For example, it has been unplugged.",
+            ),
+        }
+    }
+}
+
+impl Error for StreamError {}
+
+impl From<BackendSpecificError> for StreamError {
+    fn from(err: BackendSpecificError) -> Self {
+        Self::BackendSpecific { err }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/alsa/enumerate.rs

@@ -0,0 +1,70 @@
+use super::alsa;
+use super::{Device, DeviceHandles};
+use crate::{BackendSpecificError, DevicesError};
+use std::sync::{Arc, Mutex};
+
+/// ALSA's implementation for `Devices`.
+pub struct Devices {
+    hint_iter: alsa::device_name::HintIter,
+}
+
+impl Devices {
+    pub fn new() -> Result<Self, DevicesError> {
+        Ok(Devices {
+            hint_iter: alsa::device_name::HintIter::new_str(None, "pcm")?,
+        })
+    }
+}
+
+unsafe impl Send for Devices {}
+unsafe impl Sync for Devices {}
+
+impl Iterator for Devices {
+    type Item = Device;
+
+    fn next(&mut self) -> Option<Device> {
+        loop {
+            match self.hint_iter.next() {
+                None => return None,
+                Some(hint) => {
+                    let name = match hint.name {
+                        None => continue,
+                        // Ignoring the `null` device.
+                        Some(name) if name == "null" => continue,
+                        Some(name) => name,
+                    };
+
+                    if let Ok(handles) = DeviceHandles::open(&name) {
+                        return Some(Device {
+                            name,
+                            handles: Arc::new(Mutex::new(handles)),
+                        });
+                    }
+                }
+            }
+        }
+    }
+}
+
+#[inline]
+pub fn default_input_device() -> Option<Device> {
+    Some(Device {
+        name: "default".to_owned(),
+        handles: Arc::new(Mutex::new(Default::default())),
+    })
+}
+
+#[inline]
+pub fn default_output_device() -> Option<Device> {
+    Some(Device {
+        name: "default".to_owned(),
+        handles: Arc::new(Mutex::new(Default::default())),
+    })
+}
+
+impl From<alsa::Error> for DevicesError {
+    fn from(err: alsa::Error) -> Self {
+        let err: BackendSpecificError = err.into();
+        err.into()
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/asio/device.rs

@@ -0,0 +1,232 @@
+pub type SupportedInputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+
+use super::sys;
+use crate::BackendSpecificError;
+use crate::DefaultStreamConfigError;
+use crate::DeviceNameError;
+use crate::DevicesError;
+use crate::SampleFormat;
+use crate::SampleRate;
+use crate::SupportedBufferSize;
+use crate::SupportedStreamConfig;
+use crate::SupportedStreamConfigRange;
+use crate::SupportedStreamConfigsError;
+use std::hash::{Hash, Hasher};
+use std::sync::atomic::AtomicI32;
+use std::sync::{Arc, Mutex};
+
+/// A ASIO Device
+#[derive(Clone)]
+pub struct Device {
+    /// The driver represented by this device.
+    pub driver: Arc<sys::Driver>,
+
+    // Input and/or Output stream.
+    // A driver can only have one of each.
+    // They need to be created at the same time.
+    pub asio_streams: Arc<Mutex<sys::AsioStreams>>,
+    pub current_buffer_index: Arc<AtomicI32>,
+}
+
+/// All available devices.
+pub struct Devices {
+    asio: Arc<sys::Asio>,
+    drivers: std::vec::IntoIter<String>,
+}
+
+impl PartialEq for Device {
+    fn eq(&self, other: &Self) -> bool {
+        self.driver.name() == other.driver.name()
+    }
+}
+
+impl Eq for Device {}
+
+impl Hash for Device {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.driver.name().hash(state);
+    }
+}
+
+impl Device {
+    pub fn name(&self) -> Result<String, DeviceNameError> {
+        Ok(self.driver.name().to_string())
+    }
+
+    /// Gets the supported input configs.
+    /// TODO currently only supports the default.
+    /// Need to find all possible configs.
+    pub fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedInputConfigs, SupportedStreamConfigsError> {
+        // Retrieve the default config for the total supported channels and supported sample
+        // format.
+        let f = match self.default_input_config() {
+            Err(_) => return Err(SupportedStreamConfigsError::DeviceNotAvailable),
+            Ok(f) => f,
+        };
+
+        // Collect a config for every combination of supported sample rate and number of channels.
+        let mut supported_configs = vec![];
+        for &rate in crate::COMMON_SAMPLE_RATES {
+            if !self
+                .driver
+                .can_sample_rate(rate.0.into())
+                .ok()
+                .unwrap_or(false)
+            {
+                continue;
+            }
+            for channels in 1..f.channels + 1 {
+                supported_configs.push(SupportedStreamConfigRange {
+                    channels,
+                    min_sample_rate: rate,
+                    max_sample_rate: rate,
+                    buffer_size: f.buffer_size,
+                    sample_format: f.sample_format,
+                })
+            }
+        }
+        Ok(supported_configs.into_iter())
+    }
+
+    /// Gets the supported output configs.
+    /// TODO currently only supports the default.
+    /// Need to find all possible configs.
+    pub fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        // Retrieve the default config for the total supported channels and supported sample
+        // format.
+        let f = match self.default_output_config() {
+            Err(_) => return Err(SupportedStreamConfigsError::DeviceNotAvailable),
+            Ok(f) => f,
+        };
+
+        // Collect a config for every combination of supported sample rate and number of channels.
+        let mut supported_configs = vec![];
+        for &rate in crate::COMMON_SAMPLE_RATES {
+            if !self
+                .driver
+                .can_sample_rate(rate.0.into())
+                .ok()
+                .unwrap_or(false)
+            {
+                continue;
+            }
+            for channels in 1..f.channels + 1 {
+                supported_configs.push(SupportedStreamConfigRange {
+                    channels,
+                    min_sample_rate: rate,
+                    max_sample_rate: rate,
+                    buffer_size: f.buffer_size,
+                    sample_format: f.sample_format,
+                })
+            }
+        }
+        Ok(supported_configs.into_iter())
+    }
+
+    /// Returns the default input config
+    pub fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let channels = self.driver.channels().map_err(default_config_err)?.ins as u16;
+        let sample_rate = SampleRate(self.driver.sample_rate().map_err(default_config_err)? as _);
+        let (min, max) = self.driver.buffersize_range().map_err(default_config_err)?;
+        let buffer_size = SupportedBufferSize::Range {
+            min: min as u32,
+            max: max as u32,
+        };
+        // Map th ASIO sample type to a CPAL sample type
+        let data_type = self.driver.input_data_type().map_err(default_config_err)?;
+        let sample_format = convert_data_type(&data_type)
+            .ok_or(DefaultStreamConfigError::StreamTypeNotSupported)?;
+        Ok(SupportedStreamConfig {
+            channels,
+            sample_rate,
+            buffer_size,
+            sample_format,
+        })
+    }
+
+    /// Returns the default output config
+    pub fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let channels = self.driver.channels().map_err(default_config_err)?.outs as u16;
+        let sample_rate = SampleRate(self.driver.sample_rate().map_err(default_config_err)? as _);
+        let (min, max) = self.driver.buffersize_range().map_err(default_config_err)?;
+        let buffer_size = SupportedBufferSize::Range {
+            min: min as u32,
+            max: max as u32,
+        };
+        let data_type = self.driver.output_data_type().map_err(default_config_err)?;
+        let sample_format = convert_data_type(&data_type)
+            .ok_or(DefaultStreamConfigError::StreamTypeNotSupported)?;
+        Ok(SupportedStreamConfig {
+            channels,
+            sample_rate,
+            buffer_size,
+            sample_format,
+        })
+    }
+}
+
+impl Devices {
+    pub fn new(asio: Arc<sys::Asio>) -> Result<Self, DevicesError> {
+        let drivers = asio.driver_names().into_iter();
+        Ok(Devices { asio, drivers })
+    }
+}
+
+impl Iterator for Devices {
+    type Item = Device;
+
+    /// Load drivers and return device
+    fn next(&mut self) -> Option<Device> {
+        loop {
+            match self.drivers.next() {
+                Some(name) => match self.asio.load_driver(&name) {
+                    Ok(driver) => {
+                        let driver = Arc::new(driver);
+                        let asio_streams = Arc::new(Mutex::new(sys::AsioStreams {
+                            input: None,
+                            output: None,
+                        }));
+                        return Some(Device {
+                            driver,
+                            asio_streams,
+                            current_buffer_index: Arc::new(AtomicI32::new(-1)),
+                        });
+                    }
+                    Err(_) => continue,
+                },
+                None => return None,
+            }
+        }
+    }
+}
+
+pub(crate) fn convert_data_type(ty: &sys::AsioSampleType) -> Option<SampleFormat> {
+    let fmt = match *ty {
+        sys::AsioSampleType::ASIOSTInt16MSB => SampleFormat::I16,
+        sys::AsioSampleType::ASIOSTInt16LSB => SampleFormat::I16,
+        sys::AsioSampleType::ASIOSTFloat32MSB => SampleFormat::F32,
+        sys::AsioSampleType::ASIOSTFloat32LSB => SampleFormat::F32,
+        sys::AsioSampleType::ASIOSTInt32MSB => SampleFormat::I32,
+        sys::AsioSampleType::ASIOSTInt32LSB => SampleFormat::I32,
+        _ => return None,
+    };
+    Some(fmt)
+}
+
+fn default_config_err(e: sys::AsioError) -> DefaultStreamConfigError {
+    match e {
+        sys::AsioError::NoDrivers | sys::AsioError::HardwareMalfunction => {
+            DefaultStreamConfigError::DeviceNotAvailable
+        }
+        sys::AsioError::NoRate => DefaultStreamConfigError::StreamTypeNotSupported,
+        err => {
+            let description = format!("{}", err);
+            BackendSpecificError { description }.into()
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/asio/mod.rs

@@ -0,0 +1,138 @@
+extern crate asio_sys as sys;
+
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BuildStreamError, Data, DefaultStreamConfigError, DeviceNameError, DevicesError,
+    InputCallbackInfo, OutputCallbackInfo, PauseStreamError, PlayStreamError, SampleFormat,
+    StreamConfig, StreamError, SupportedStreamConfig, SupportedStreamConfigsError,
+};
+
+pub use self::device::{Device, Devices, SupportedInputConfigs, SupportedOutputConfigs};
+pub use self::stream::Stream;
+use std::sync::Arc;
+use std::time::Duration;
+
+mod device;
+mod stream;
+
+/// The host for ASIO.
+#[derive(Debug)]
+pub struct Host {
+    asio: Arc<sys::Asio>,
+}
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        let asio = Arc::new(sys::Asio::new());
+        let host = Host { asio };
+        Ok(host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        true
+        //unimplemented!("check how to do this using asio-sys")
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new(self.asio.clone())
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        // ASIO has no concept of a default device, so just use the first.
+        self.input_devices().ok().and_then(|mut ds| ds.next())
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        // ASIO has no concept of a default device, so just use the first.
+        self.output_devices().ok().and_then(|mut ds| ds.next())
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Device::name(self)
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Device::supported_input_configs(self)
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Device::supported_output_configs(self)
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_input_config(self)
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_output_config(self)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Device::build_input_stream_raw(
+            self,
+            config,
+            sample_format,
+            data_callback,
+            error_callback,
+            timeout,
+        )
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Device::build_output_stream_raw(
+            self,
+            config,
+            sample_format,
+            data_callback,
+            error_callback,
+            timeout,
+        )
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        Stream::play(self)
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        Stream::pause(self)
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/asio/stream.rs

@@ -0,0 +1,718 @@
+extern crate asio_sys as sys;
+extern crate num_traits;
+
+use self::num_traits::PrimInt;
+use super::Device;
+use crate::{
+    BackendSpecificError, BufferSize, BuildStreamError, Data, InputCallbackInfo,
+    OutputCallbackInfo, PauseStreamError, PlayStreamError, SampleFormat, StreamConfig, StreamError,
+};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex};
+use std::time::Duration;
+
+pub struct Stream {
+    playing: Arc<AtomicBool>,
+    // Ensure the `Driver` does not terminate until the last stream is dropped.
+    driver: Arc<sys::Driver>,
+    #[allow(dead_code)]
+    asio_streams: Arc<Mutex<sys::AsioStreams>>,
+    callback_id: sys::CallbackId,
+}
+
+impl Stream {
+    pub fn play(&self) -> Result<(), PlayStreamError> {
+        self.playing.store(true, Ordering::SeqCst);
+        Ok(())
+    }
+
+    pub fn pause(&self) -> Result<(), PauseStreamError> {
+        self.playing.store(false, Ordering::SeqCst);
+        Ok(())
+    }
+}
+
+impl Device {
+    pub fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let stream_type = self.driver.input_data_type().map_err(build_stream_err)?;
+
+        // Ensure that the desired sample type is supported.
+        let expected_sample_format = super::device::convert_data_type(&stream_type)
+            .ok_or(BuildStreamError::StreamConfigNotSupported)?;
+        if sample_format != expected_sample_format {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+
+        let num_channels = config.channels;
+        let buffer_size = self.get_or_create_input_stream(config, sample_format)?;
+        let cpal_num_samples = buffer_size * num_channels as usize;
+
+        // Create the buffer depending on the size of the data type.
+        let len_bytes = cpal_num_samples * sample_format.sample_size();
+        let mut interleaved = vec![0u8; len_bytes];
+
+        let stream_playing = Arc::new(AtomicBool::new(false));
+        let playing = Arc::clone(&stream_playing);
+        let asio_streams = self.asio_streams.clone();
+
+        // Set the input callback.
+        // This is most performance critical part of the ASIO bindings.
+        let config = config.clone();
+        let callback_id = self.driver.add_callback(move |callback_info| unsafe {
+            // If not playing return early.
+            if !playing.load(Ordering::SeqCst) {
+                return;
+            }
+
+            // There is 0% chance of lock contention the host only locks when recreating streams.
+            let stream_lock = asio_streams.lock().unwrap();
+            let asio_stream = match stream_lock.input {
+                Some(ref asio_stream) => asio_stream,
+                None => return,
+            };
+
+            /// 1. Write from the ASIO buffer to the interleaved CPAL buffer.
+            /// 2. Deliver the CPAL buffer to the user callback.
+            unsafe fn process_input_callback<A, D, F>(
+                data_callback: &mut D,
+                interleaved: &mut [u8],
+                asio_stream: &sys::AsioStream,
+                asio_info: &sys::CallbackInfo,
+                sample_rate: crate::SampleRate,
+                format: SampleFormat,
+                from_endianness: F,
+            ) where
+                A: Copy,
+                D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+                F: Fn(A) -> A,
+            {
+                // 1. Write the ASIO channels to the CPAL buffer.
+                let interleaved: &mut [A] = cast_slice_mut(interleaved);
+                let n_frames = asio_stream.buffer_size as usize;
+                let n_channels = interleaved.len() / n_frames;
+                let buffer_index = asio_info.buffer_index as usize;
+                for ch_ix in 0..n_channels {
+                    let asio_channel = asio_channel_slice::<A>(asio_stream, buffer_index, ch_ix);
+                    for (frame, s_asio) in interleaved.chunks_mut(n_channels).zip(asio_channel) {
+                        frame[ch_ix] = from_endianness(*s_asio);
+                    }
+                }
+
+                // 2. Deliver the interleaved buffer to the callback.
+                let data = interleaved.as_mut_ptr() as *mut ();
+                let len = interleaved.len();
+                let data = Data::from_parts(data, len, format);
+                let callback = system_time_to_stream_instant(asio_info.system_time);
+                let delay = frames_to_duration(n_frames, sample_rate);
+                let capture = callback
+                    .sub(delay)
+                    .expect("`capture` occurs before origin of alsa `StreamInstant`");
+                let timestamp = crate::InputStreamTimestamp { callback, capture };
+                let info = InputCallbackInfo { timestamp };
+                data_callback(&data, &info);
+            }
+
+            match (&stream_type, sample_format) {
+                (&sys::AsioSampleType::ASIOSTInt16LSB, SampleFormat::I16) => {
+                    process_input_callback::<i16, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I16,
+                        from_le,
+                    );
+                }
+                (&sys::AsioSampleType::ASIOSTInt16MSB, SampleFormat::I16) => {
+                    process_input_callback::<i16, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I16,
+                        from_be,
+                    );
+                }
+
+                (&sys::AsioSampleType::ASIOSTFloat32LSB, SampleFormat::F32) => {
+                    process_input_callback::<u32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F32,
+                        from_le,
+                    );
+                }
+                (&sys::AsioSampleType::ASIOSTFloat32MSB, SampleFormat::F32) => {
+                    process_input_callback::<u32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F32,
+                        from_be,
+                    );
+                }
+
+                (&sys::AsioSampleType::ASIOSTInt32LSB, SampleFormat::I32) => {
+                    process_input_callback::<i32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I32,
+                        from_le,
+                    );
+                }
+                (&sys::AsioSampleType::ASIOSTInt32MSB, SampleFormat::I32) => {
+                    process_input_callback::<i32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I32,
+                        from_be,
+                    );
+                }
+
+                (&sys::AsioSampleType::ASIOSTFloat64LSB, SampleFormat::F64) => {
+                    process_input_callback::<u64, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F64,
+                        from_le,
+                    );
+                }
+                (&sys::AsioSampleType::ASIOSTFloat64MSB, SampleFormat::F64) => {
+                    process_input_callback::<u64, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F64,
+                        from_be,
+                    );
+                }
+
+                unsupported_format_pair => unreachable!(
+                    "`build_input_stream_raw` should have returned with unsupported \
+                     format {:?}",
+                    unsupported_format_pair
+                ),
+            }
+        });
+
+        let driver = self.driver.clone();
+        let asio_streams = self.asio_streams.clone();
+
+        // Immediately start the device?
+        self.driver.start().map_err(build_stream_err)?;
+
+        Ok(Stream {
+            playing: stream_playing,
+            driver,
+            asio_streams,
+            callback_id,
+        })
+    }
+
+    pub fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let stream_type = self.driver.output_data_type().map_err(build_stream_err)?;
+
+        // Ensure that the desired sample type is supported.
+        let expected_sample_format = super::device::convert_data_type(&stream_type)
+            .ok_or(BuildStreamError::StreamConfigNotSupported)?;
+        if sample_format != expected_sample_format {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+
+        let num_channels = config.channels;
+        let buffer_size = self.get_or_create_output_stream(config, sample_format)?;
+        let cpal_num_samples = buffer_size * num_channels as usize;
+
+        // Create buffers depending on data type.
+        let len_bytes = cpal_num_samples * sample_format.sample_size();
+        let mut interleaved = vec![0u8; len_bytes];
+        let current_buffer_index = self.current_buffer_index.clone();
+
+        let stream_playing = Arc::new(AtomicBool::new(false));
+        let playing = Arc::clone(&stream_playing);
+        let asio_streams = self.asio_streams.clone();
+
+        let config = config.clone();
+        let callback_id = self.driver.add_callback(move |callback_info| unsafe {
+            // If not playing, return early.
+            if !playing.load(Ordering::SeqCst) {
+                return;
+            }
+
+            // There is 0% chance of lock contention the host only locks when recreating streams.
+            let mut stream_lock = asio_streams.lock().unwrap();
+            let asio_stream = match stream_lock.output {
+                Some(ref mut asio_stream) => asio_stream,
+                None => return,
+            };
+
+            // Silence the ASIO buffer that is about to be used.
+            //
+            // This checks if any other callbacks have already silenced the buffer associated with
+            // the current `buffer_index`.
+            let silence =
+                current_buffer_index.load(Ordering::Acquire) != callback_info.buffer_index;
+
+            if silence {
+                current_buffer_index.store(callback_info.buffer_index, Ordering::Release);
+            }
+
+            /// 1. Render the given callback to the given buffer of interleaved samples.
+            /// 2. If required, silence the ASIO buffer.
+            /// 3. Finally, write the interleaved data to the non-interleaved ASIO buffer,
+            ///    performing endianness conversions as necessary.
+            unsafe fn process_output_callback<A, D, F>(
+                data_callback: &mut D,
+                interleaved: &mut [u8],
+                silence_asio_buffer: bool,
+                asio_stream: &mut sys::AsioStream,
+                asio_info: &sys::CallbackInfo,
+                sample_rate: crate::SampleRate,
+                format: SampleFormat,
+                mix_samples: F,
+            ) where
+                A: Copy,
+                D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+                F: Fn(A, A) -> A,
+            {
+                // 1. Render interleaved buffer from callback.
+                let interleaved: &mut [A] = cast_slice_mut(interleaved);
+                let data = interleaved.as_mut_ptr() as *mut ();
+                let len = interleaved.len();
+                let mut data = Data::from_parts(data, len, format);
+                let callback = system_time_to_stream_instant(asio_info.system_time);
+                let n_frames = asio_stream.buffer_size as usize;
+                let delay = frames_to_duration(n_frames, sample_rate);
+                let playback = callback
+                    .add(delay)
+                    .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+                let timestamp = crate::OutputStreamTimestamp { callback, playback };
+                let info = OutputCallbackInfo { timestamp };
+                data_callback(&mut data, &info);
+
+                // 2. Silence ASIO channels if necessary.
+                let n_channels = interleaved.len() / n_frames;
+                let buffer_index = asio_info.buffer_index as usize;
+                if silence_asio_buffer {
+                    for ch_ix in 0..n_channels {
+                        let asio_channel =
+                            asio_channel_slice_mut::<A>(asio_stream, buffer_index, ch_ix);
+                        asio_channel.align_to_mut::<u8>().1.fill(0);
+                    }
+                }
+
+                // 3. Write interleaved samples to ASIO channels, one channel at a time.
+                for ch_ix in 0..n_channels {
+                    let asio_channel =
+                        asio_channel_slice_mut::<A>(asio_stream, buffer_index, ch_ix);
+                    for (frame, s_asio) in interleaved.chunks(n_channels).zip(asio_channel) {
+                        *s_asio = mix_samples(*s_asio, frame[ch_ix]);
+                    }
+                }
+            }
+
+            match (sample_format, &stream_type) {
+                (SampleFormat::I16, &sys::AsioSampleType::ASIOSTInt16LSB) => {
+                    process_output_callback::<i16, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I16,
+                        |old_sample, new_sample| {
+                            from_le(old_sample).saturating_add(new_sample).to_le()
+                        },
+                    );
+                }
+                (SampleFormat::I16, &sys::AsioSampleType::ASIOSTInt16MSB) => {
+                    process_output_callback::<i16, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I16,
+                        |old_sample, new_sample| {
+                            from_be(old_sample).saturating_add(new_sample).to_be()
+                        },
+                    );
+                }
+                (SampleFormat::F32, &sys::AsioSampleType::ASIOSTFloat32LSB) => {
+                    process_output_callback::<u32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F32,
+                        |old_sample, new_sample| {
+                            (f32::from_bits(from_le(old_sample)) + f32::from_bits(new_sample))
+                                .to_bits()
+                                .to_le()
+                        },
+                    );
+                }
+
+                (SampleFormat::F32, &sys::AsioSampleType::ASIOSTFloat32MSB) => {
+                    process_output_callback::<u32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F32,
+                        |old_sample, new_sample| {
+                            (f32::from_bits(from_be(old_sample)) + f32::from_bits(new_sample))
+                                .to_bits()
+                                .to_be()
+                        },
+                    );
+                }
+
+                (SampleFormat::I32, &sys::AsioSampleType::ASIOSTInt32LSB) => {
+                    process_output_callback::<i32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I32,
+                        |old_sample, new_sample| {
+                            from_le(old_sample).saturating_add(new_sample).to_le()
+                        },
+                    );
+                }
+                (SampleFormat::I32, &sys::AsioSampleType::ASIOSTInt32MSB) => {
+                    process_output_callback::<i32, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::I32,
+                        |old_sample, new_sample| {
+                            from_be(old_sample).saturating_add(new_sample).to_be()
+                        },
+                    );
+                }
+
+                (SampleFormat::F64, &sys::AsioSampleType::ASIOSTFloat64LSB) => {
+                    process_output_callback::<u64, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F64,
+                        |old_sample, new_sample| {
+                            (f64::from_bits(from_le(old_sample)) + f64::from_bits(new_sample))
+                                .to_bits()
+                                .to_le()
+                        },
+                    );
+                }
+
+                (SampleFormat::F64, &sys::AsioSampleType::ASIOSTFloat64MSB) => {
+                    process_output_callback::<u64, _, _>(
+                        &mut data_callback,
+                        &mut interleaved,
+                        silence,
+                        asio_stream,
+                        callback_info,
+                        config.sample_rate,
+                        SampleFormat::F64,
+                        |old_sample, new_sample| {
+                            (f64::from_bits(from_be(old_sample)) + f64::from_bits(new_sample))
+                                .to_bits()
+                                .to_be()
+                        },
+                    );
+                }
+
+                unsupported_format_pair => unreachable!(
+                    "`build_output_stream_raw` should have returned with unsupported \
+                     format {:?}",
+                    unsupported_format_pair
+                ),
+            }
+        });
+
+        let driver = self.driver.clone();
+        let asio_streams = self.asio_streams.clone();
+
+        // Immediately start the device?
+        self.driver.start().map_err(build_stream_err)?;
+
+        Ok(Stream {
+            playing: stream_playing,
+            driver,
+            asio_streams,
+            callback_id,
+        })
+    }
+
+    /// Create a new CPAL Input Stream.
+    ///
+    /// If there is no existing ASIO Input Stream it will be created.
+    ///
+    /// On success, the buffer size of the stream is returned.
+    fn get_or_create_input_stream(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+    ) -> Result<usize, BuildStreamError> {
+        match self.default_input_config() {
+            Ok(f) => {
+                let num_asio_channels = f.channels;
+                check_config(&self.driver, config, sample_format, num_asio_channels)
+            }
+            Err(_) => Err(BuildStreamError::StreamConfigNotSupported),
+        }?;
+        let num_channels = config.channels as usize;
+        let mut streams = self.asio_streams.lock().unwrap();
+
+        let buffer_size = match config.buffer_size {
+            BufferSize::Fixed(v) => Some(v as i32),
+            BufferSize::Default => None,
+        };
+
+        // Either create a stream if thers none or had back the
+        // size of the current one.
+        match streams.input {
+            Some(ref input) => Ok(input.buffer_size as usize),
+            None => {
+                let output = streams.output.take();
+                self.driver
+                    .prepare_input_stream(output, num_channels, buffer_size)
+                    .map(|new_streams| {
+                        let bs = match new_streams.input {
+                            Some(ref inp) => inp.buffer_size as usize,
+                            None => unreachable!(),
+                        };
+                        *streams = new_streams;
+                        bs
+                    })
+                    .map_err(|ref e| {
+                        println!("Error preparing stream: {}", e);
+                        BuildStreamError::DeviceNotAvailable
+                    })
+            }
+        }
+    }
+
+    /// Create a new CPAL Output Stream.
+    ///
+    /// If there is no existing ASIO Output Stream it will be created.
+    fn get_or_create_output_stream(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+    ) -> Result<usize, BuildStreamError> {
+        match self.default_output_config() {
+            Ok(f) => {
+                let num_asio_channels = f.channels;
+                check_config(&self.driver, config, sample_format, num_asio_channels)
+            }
+            Err(_) => Err(BuildStreamError::StreamConfigNotSupported),
+        }?;
+        let num_channels = config.channels as usize;
+        let mut streams = self.asio_streams.lock().unwrap();
+
+        let buffer_size = match config.buffer_size {
+            BufferSize::Fixed(v) => Some(v as i32),
+            BufferSize::Default => None,
+        };
+
+        // Either create a stream if thers none or had back the
+        // size of the current one.
+        match streams.output {
+            Some(ref output) => Ok(output.buffer_size as usize),
+            None => {
+                let input = streams.input.take();
+                self.driver
+                    .prepare_output_stream(input, num_channels, buffer_size)
+                    .map(|new_streams| {
+                        let bs = match new_streams.output {
+                            Some(ref out) => out.buffer_size as usize,
+                            None => unreachable!(),
+                        };
+                        *streams = new_streams;
+                        bs
+                    })
+                    .map_err(|ref e| {
+                        println!("Error preparing stream: {}", e);
+                        BuildStreamError::DeviceNotAvailable
+                    })
+            }
+        }
+    }
+}
+
+impl Drop for Stream {
+    fn drop(&mut self) {
+        self.driver.remove_callback(self.callback_id);
+    }
+}
+
+fn asio_ns_to_double(val: sys::bindings::asio_import::ASIOTimeStamp) -> f64 {
+    let two_raised_to_32 = 4294967296.0;
+    val.lo as f64 + val.hi as f64 * two_raised_to_32
+}
+
+/// Asio retrieves system time via `timeGetTime` which returns the time in milliseconds.
+fn system_time_to_stream_instant(
+    system_time: sys::bindings::asio_import::ASIOTimeStamp,
+) -> crate::StreamInstant {
+    let systime_ns = asio_ns_to_double(system_time);
+    let secs = systime_ns as i64 / 1_000_000_000;
+    let nanos = (systime_ns as i64 - secs * 1_000_000_000) as u32;
+    crate::StreamInstant::new(secs, nanos)
+}
+
+/// Convert the given duration in frames at the given sample rate to a `std::time::Duration`.
+fn frames_to_duration(frames: usize, rate: crate::SampleRate) -> std::time::Duration {
+    let secsf = frames as f64 / rate.0 as f64;
+    let secs = secsf as u64;
+    let nanos = ((secsf - secs as f64) * 1_000_000_000.0) as u32;
+    std::time::Duration::new(secs, nanos)
+}
+
+/// Check whether or not the desired config is supported by the stream.
+///
+/// Checks sample rate, data type and then finally the number of channels.
+fn check_config(
+    driver: &sys::Driver,
+    config: &StreamConfig,
+    sample_format: SampleFormat,
+    num_asio_channels: u16,
+) -> Result<(), BuildStreamError> {
+    let StreamConfig {
+        channels,
+        sample_rate,
+        buffer_size: _,
+    } = config;
+    // Try and set the sample rate to what the user selected.
+    let sample_rate = sample_rate.0.into();
+    if sample_rate != driver.sample_rate().map_err(build_stream_err)? {
+        if driver
+            .can_sample_rate(sample_rate)
+            .map_err(build_stream_err)?
+        {
+            driver
+                .set_sample_rate(sample_rate)
+                .map_err(build_stream_err)?;
+        } else {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+    }
+    // unsigned formats are not supported by asio
+    match sample_format {
+        SampleFormat::I16 | SampleFormat::I32 | SampleFormat::F32 => (),
+        _ => return Err(BuildStreamError::StreamConfigNotSupported),
+    }
+    if *channels > num_asio_channels {
+        return Err(BuildStreamError::StreamConfigNotSupported);
+    }
+    Ok(())
+}
+
+/// Cast a byte slice into a mutable slice of desired type.
+///
+/// Safety: it's up to the caller to ensure that the input slice has valid bit representations.
+unsafe fn cast_slice_mut<T>(v: &mut [u8]) -> &mut [T] {
+    debug_assert!(v.len() % std::mem::size_of::<T>() == 0);
+    std::slice::from_raw_parts_mut(v.as_mut_ptr() as *mut T, v.len() / std::mem::size_of::<T>())
+}
+
+/// Helper function to convert from little endianness.
+fn from_le<T: PrimInt>(t: T) -> T {
+    T::from_le(t)
+}
+
+/// Helper function to convert from little endianness.
+fn from_be<T: PrimInt>(t: T) -> T {
+    T::from_be(t)
+}
+
+/// Shorthand for retrieving the asio buffer slice associated with a channel.
+unsafe fn asio_channel_slice<T>(
+    asio_stream: &sys::AsioStream,
+    buffer_index: usize,
+    channel_index: usize,
+) -> &[T] {
+    let buff_ptr: *const T =
+        asio_stream.buffer_infos[channel_index].buffers[buffer_index as usize] as *const _;
+    std::slice::from_raw_parts(buff_ptr, asio_stream.buffer_size as usize)
+}
+
+/// Shorthand for retrieving the asio buffer slice associated with a channel.
+unsafe fn asio_channel_slice_mut<T>(
+    asio_stream: &mut sys::AsioStream,
+    buffer_index: usize,
+    channel_index: usize,
+) -> &mut [T] {
+    let buff_ptr: *mut T =
+        asio_stream.buffer_infos[channel_index].buffers[buffer_index as usize] as *mut _;
+    std::slice::from_raw_parts_mut(buff_ptr, asio_stream.buffer_size as usize)
+}
+
+fn build_stream_err(e: sys::AsioError) -> BuildStreamError {
+    match e {
+        sys::AsioError::NoDrivers | sys::AsioError::HardwareMalfunction => {
+            BuildStreamError::DeviceNotAvailable
+        }
+        sys::AsioError::InvalidInput | sys::AsioError::BadMode => BuildStreamError::InvalidArgument,
+        err => {
+            let description = format!("{}", err);
+            BackendSpecificError { description }.into()
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/ios/enumerate.rs

@@ -0,0 +1,43 @@
+use std::vec::IntoIter as VecIntoIter;
+
+use crate::DevicesError;
+use crate::SupportedStreamConfigRange;
+
+use super::Device;
+
+pub type SupportedInputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+
+// TODO: Support enumerating earpiece vs headset vs speaker etc?
+pub struct Devices(VecIntoIter<Device>);
+
+impl Devices {
+    pub fn new() -> Result<Self, DevicesError> {
+        Ok(Self::default())
+    }
+}
+
+impl Default for Devices {
+    fn default() -> Devices {
+        Devices(vec![Device].into_iter())
+    }
+}
+
+impl Iterator for Devices {
+    type Item = Device;
+
+    #[inline]
+    fn next(&mut self) -> Option<Device> {
+        self.0.next()
+    }
+}
+
+#[inline]
+pub fn default_input_device() -> Option<Device> {
+    Some(Device)
+}
+
+#[inline]
+pub fn default_output_device() -> Option<Device> {
+    Some(Device)
+}

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/ios/mod.rs

@@ -0,0 +1,434 @@
+//!
+//! coreaudio on iOS looks a bit different from macOS. A lot of configuration needs to use
+//! the AVAudioSession objc API which doesn't exist on macOS.
+//!
+//! TODO:
+//! - Use AVAudioSession to enumerate buffer size / sample rate / number of channels and set
+//!   buffer size.
+//!
+
+extern crate core_foundation_sys;
+extern crate coreaudio;
+
+use std::cell::RefCell;
+
+use self::coreaudio::audio_unit::render_callback::data;
+use self::coreaudio::audio_unit::{render_callback, AudioUnit, Element, Scope};
+use self::coreaudio::sys::{
+    kAudioOutputUnitProperty_EnableIO, kAudioUnitProperty_StreamFormat, AudioBuffer,
+    AudioStreamBasicDescription,
+};
+
+use super::{asbd_from_config, frames_to_duration, host_time_to_stream_instant};
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+
+use crate::{
+    BackendSpecificError, BufferSize, BuildStreamError, Data, DefaultStreamConfigError,
+    DeviceNameError, DevicesError, InputCallbackInfo, OutputCallbackInfo, PauseStreamError,
+    PlayStreamError, SampleFormat, SampleRate, StreamConfig, StreamError, SupportedBufferSize,
+    SupportedStreamConfig, SupportedStreamConfigRange, SupportedStreamConfigsError,
+};
+
+use self::enumerate::{
+    default_input_device, default_output_device, Devices, SupportedInputConfigs,
+    SupportedOutputConfigs,
+};
+use std::slice;
+use std::time::Duration;
+
+pub mod enumerate;
+
+// These days the default of iOS is now F32 and no longer I16
+const SUPPORTED_SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Device;
+
+pub struct Host;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        default_input_device()
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        default_output_device()
+    }
+}
+
+impl Device {
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Ok("Default Device".to_owned())
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedInputConfigs, SupportedStreamConfigsError> {
+        // TODO: query AVAudioSession for parameters, some values like sample rate and buffer size
+        // probably need to actually be set to see if it works, but channels can be enumerated.
+
+        let asbd: AudioStreamBasicDescription = default_input_asbd()?;
+        let stream_config = stream_config_from_asbd(asbd);
+        Ok(vec![SupportedStreamConfigRange {
+            channels: stream_config.channels,
+            min_sample_rate: stream_config.sample_rate,
+            max_sample_rate: stream_config.sample_rate,
+            buffer_size: stream_config.buffer_size.clone(),
+            sample_format: SUPPORTED_SAMPLE_FORMAT,
+        }]
+        .into_iter())
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        // TODO: query AVAudioSession for parameters, some values like sample rate and buffer size
+        // probably need to actually be set to see if it works, but channels can be enumerated.
+
+        let asbd: AudioStreamBasicDescription = default_output_asbd()?;
+        let stream_config = stream_config_from_asbd(asbd);
+
+        let configs: Vec<_> = (1..=asbd.mChannelsPerFrame as u16)
+            .map(|channels| SupportedStreamConfigRange {
+                channels,
+                min_sample_rate: stream_config.sample_rate,
+                max_sample_rate: stream_config.sample_rate,
+                buffer_size: stream_config.buffer_size.clone(),
+                sample_format: SUPPORTED_SAMPLE_FORMAT,
+            })
+            .collect();
+        Ok(configs.into_iter())
+    }
+
+    #[inline]
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let asbd: AudioStreamBasicDescription = default_input_asbd()?;
+        let stream_config = stream_config_from_asbd(asbd);
+        Ok(stream_config)
+    }
+
+    #[inline]
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let asbd: AudioStreamBasicDescription = default_output_asbd()?;
+        let stream_config = stream_config_from_asbd(asbd);
+        Ok(stream_config)
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Device::name(self)
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Device::supported_input_configs(self)
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Device::supported_output_configs(self)
+    }
+
+    #[inline]
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_input_config(self)
+    }
+
+    #[inline]
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_output_config(self)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        mut error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        // The scope and element for working with a device's input stream.
+        let scope = Scope::Output;
+        let element = Element::Input;
+
+        let mut audio_unit = create_audio_unit()?;
+        audio_unit.uninitialize()?;
+        configure_for_recording(&mut audio_unit)?;
+        audio_unit.initialize()?;
+
+        // Set the stream in interleaved mode.
+        let asbd = asbd_from_config(config, sample_format);
+        audio_unit.set_property(kAudioUnitProperty_StreamFormat, scope, element, Some(&asbd))?;
+
+        // Set the buffersize
+        match config.buffer_size {
+            BufferSize::Fixed(_) => {
+                return Err(BuildStreamError::StreamConfigNotSupported);
+            }
+            BufferSize::Default => (),
+        }
+
+        // Register the callback that is being called by coreaudio whenever it needs data to be
+        // fed to the audio buffer.
+        let bytes_per_channel = sample_format.sample_size();
+        let sample_rate = config.sample_rate;
+        type Args = render_callback::Args<data::Raw>;
+        audio_unit.set_input_callback(move |args: Args| unsafe {
+            let ptr = (*args.data.data).mBuffers.as_ptr() as *const AudioBuffer;
+            let len = (*args.data.data).mNumberBuffers as usize;
+            let buffers: &[AudioBuffer] = slice::from_raw_parts(ptr, len);
+
+            // There is only 1 buffer when using interleaved channels
+            let AudioBuffer {
+                mNumberChannels: channels,
+                mDataByteSize: data_byte_size,
+                mData: data,
+            } = buffers[0];
+
+            let data = data as *mut ();
+            let len = (data_byte_size as usize / bytes_per_channel) as usize;
+            let data = Data::from_parts(data, len, sample_format);
+
+            // TODO: Need a better way to get delay, for now we assume a double-buffer offset.
+            let callback = match host_time_to_stream_instant(args.time_stamp.mHostTime) {
+                Err(err) => {
+                    error_callback(err.into());
+                    return Err(());
+                }
+                Ok(cb) => cb,
+            };
+            let buffer_frames = len / channels as usize;
+            let delay = frames_to_duration(buffer_frames, sample_rate);
+            let capture = callback
+                .sub(delay)
+                .expect("`capture` occurs before origin of alsa `StreamInstant`");
+            let timestamp = crate::InputStreamTimestamp { callback, capture };
+
+            let info = InputCallbackInfo { timestamp };
+            data_callback(&data, &info);
+            Ok(())
+        })?;
+
+        audio_unit.start()?;
+
+        Ok(Stream::new(StreamInner {
+            playing: true,
+            audio_unit,
+        }))
+    }
+
+    /// Create an output stream.
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        mut error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        match config.buffer_size {
+            BufferSize::Fixed(_) => {
+                return Err(BuildStreamError::StreamConfigNotSupported);
+            }
+            BufferSize::Default => (),
+        };
+
+        let mut audio_unit = create_audio_unit()?;
+
+        // The scope and element for working with a device's output stream.
+        let scope = Scope::Input;
+        let element = Element::Output;
+
+        // Set the stream in interleaved mode.
+        let asbd = asbd_from_config(config, sample_format);
+        audio_unit.set_property(kAudioUnitProperty_StreamFormat, scope, element, Some(&asbd))?;
+
+        // Register the callback that is being called by coreaudio whenever it needs data to be
+        // fed to the audio buffer.
+        let bytes_per_channel = sample_format.sample_size();
+        let sample_rate = config.sample_rate;
+        type Args = render_callback::Args<data::Raw>;
+        audio_unit.set_render_callback(move |args: Args| unsafe {
+            // If `run()` is currently running, then a callback will be available from this list.
+            // Otherwise, we just fill the buffer with zeroes and return.
+
+            let AudioBuffer {
+                mNumberChannels: channels,
+                mDataByteSize: data_byte_size,
+                mData: data,
+            } = (*args.data.data).mBuffers[0];
+
+            let data = data as *mut ();
+            let len = (data_byte_size as usize / bytes_per_channel) as usize;
+            let mut data = Data::from_parts(data, len, sample_format);
+
+            let callback = match host_time_to_stream_instant(args.time_stamp.mHostTime) {
+                Err(err) => {
+                    error_callback(err.into());
+                    return Err(());
+                }
+                Ok(cb) => cb,
+            };
+            // TODO: Need a better way to get delay, for now we assume a double-buffer offset.
+            let buffer_frames = len / channels as usize;
+            let delay = frames_to_duration(buffer_frames, sample_rate);
+            let playback = callback
+                .add(delay)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let timestamp = crate::OutputStreamTimestamp { callback, playback };
+
+            let info = OutputCallbackInfo { timestamp };
+            data_callback(&mut data, &info);
+            Ok(())
+        })?;
+
+        audio_unit.start()?;
+
+        Ok(Stream::new(StreamInner {
+            playing: true,
+            audio_unit,
+        }))
+    }
+}
+
+pub struct Stream {
+    inner: RefCell<StreamInner>,
+}
+
+impl Stream {
+    fn new(inner: StreamInner) -> Self {
+        Self {
+            inner: RefCell::new(inner),
+        }
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        let mut stream = self.inner.borrow_mut();
+
+        if !stream.playing {
+            if let Err(e) = stream.audio_unit.start() {
+                let description = format!("{}", e);
+                let err = BackendSpecificError { description };
+                return Err(err.into());
+            }
+            stream.playing = true;
+        }
+        Ok(())
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        let mut stream = self.inner.borrow_mut();
+
+        if stream.playing {
+            if let Err(e) = stream.audio_unit.stop() {
+                let description = format!("{}", e);
+                let err = BackendSpecificError { description };
+                return Err(err.into());
+            }
+
+            stream.playing = false;
+        }
+        Ok(())
+    }
+}
+
+struct StreamInner {
+    playing: bool,
+    audio_unit: AudioUnit,
+}
+
+fn create_audio_unit() -> Result<AudioUnit, coreaudio::Error> {
+    AudioUnit::new(coreaudio::audio_unit::IOType::RemoteIO)
+}
+
+fn configure_for_recording(audio_unit: &mut AudioUnit) -> Result<(), coreaudio::Error> {
+    // Enable mic recording
+    let enable_input = 1u32;
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_EnableIO,
+        Scope::Input,
+        Element::Input,
+        Some(&enable_input),
+    )?;
+
+    // Disable output
+    let disable_output = 0u32;
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_EnableIO,
+        Scope::Output,
+        Element::Output,
+        Some(&disable_output),
+    )?;
+
+    Ok(())
+}
+
+fn default_output_asbd() -> Result<AudioStreamBasicDescription, coreaudio::Error> {
+    let audio_unit = create_audio_unit()?;
+    let id = kAudioUnitProperty_StreamFormat;
+    let asbd: AudioStreamBasicDescription =
+        audio_unit.get_property(id, Scope::Output, Element::Output)?;
+    Ok(asbd)
+}
+
+fn default_input_asbd() -> Result<AudioStreamBasicDescription, coreaudio::Error> {
+    let mut audio_unit = create_audio_unit()?;
+    audio_unit.uninitialize()?;
+    configure_for_recording(&mut audio_unit)?;
+    audio_unit.initialize()?;
+
+    let id = kAudioUnitProperty_StreamFormat;
+    let asbd: AudioStreamBasicDescription =
+        audio_unit.get_property(id, Scope::Input, Element::Input)?;
+    Ok(asbd)
+}
+
+fn stream_config_from_asbd(asbd: AudioStreamBasicDescription) -> SupportedStreamConfig {
+    let buffer_size = SupportedBufferSize::Range { min: 0, max: 0 };
+    SupportedStreamConfig {
+        channels: asbd.mChannelsPerFrame as u16,
+        sample_rate: SampleRate(asbd.mSampleRate as u32),
+        buffer_size: buffer_size.clone(),
+        sample_format: SUPPORTED_SAMPLE_FORMAT,
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/macos/enumerate.rs

@@ -0,0 +1,152 @@
+extern crate coreaudio;
+
+use self::coreaudio::sys::{
+    kAudioHardwareNoError, kAudioHardwarePropertyDefaultInputDevice,
+    kAudioHardwarePropertyDefaultOutputDevice, kAudioHardwarePropertyDevices,
+    kAudioObjectPropertyElementMaster, kAudioObjectPropertyScopeGlobal, kAudioObjectSystemObject,
+    AudioDeviceID, AudioObjectGetPropertyData, AudioObjectGetPropertyDataSize,
+    AudioObjectPropertyAddress, OSStatus,
+};
+use super::Device;
+use crate::{BackendSpecificError, DevicesError, SupportedStreamConfigRange};
+use std::mem;
+use std::ptr::null;
+use std::vec::IntoIter as VecIntoIter;
+
+unsafe fn audio_devices() -> Result<Vec<AudioDeviceID>, OSStatus> {
+    let property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioHardwarePropertyDevices,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+
+    macro_rules! try_status_or_return {
+        ($status:expr) => {
+            if $status != kAudioHardwareNoError as i32 {
+                return Err($status);
+            }
+        };
+    }
+
+    let data_size = 0u32;
+    let status = AudioObjectGetPropertyDataSize(
+        kAudioObjectSystemObject,
+        &property_address as *const _,
+        0,
+        null(),
+        &data_size as *const _ as *mut _,
+    );
+    try_status_or_return!(status);
+
+    let device_count = data_size / mem::size_of::<AudioDeviceID>() as u32;
+    let mut audio_devices = vec![];
+    audio_devices.reserve_exact(device_count as usize);
+
+    let status = AudioObjectGetPropertyData(
+        kAudioObjectSystemObject,
+        &property_address as *const _,
+        0,
+        null(),
+        &data_size as *const _ as *mut _,
+        audio_devices.as_mut_ptr() as *mut _,
+    );
+    try_status_or_return!(status);
+
+    audio_devices.set_len(device_count as usize);
+
+    Ok(audio_devices)
+}
+
+pub struct Devices(VecIntoIter<AudioDeviceID>);
+
+impl Devices {
+    pub fn new() -> Result<Self, DevicesError> {
+        let devices = unsafe {
+            match audio_devices() {
+                Ok(devices) => devices,
+                Err(os_status) => {
+                    let description = format!("{}", os_status);
+                    let err = BackendSpecificError { description };
+                    return Err(err.into());
+                }
+            }
+        };
+        Ok(Devices(devices.into_iter()))
+    }
+}
+
+unsafe impl Send for Devices {}
+unsafe impl Sync for Devices {}
+
+impl Iterator for Devices {
+    type Item = Device;
+    fn next(&mut self) -> Option<Device> {
+        self.0.next().map(|id| Device {
+            audio_device_id: id,
+            is_default: false,
+        })
+    }
+}
+
+pub fn default_input_device() -> Option<Device> {
+    let property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioHardwarePropertyDefaultInputDevice,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+
+    let audio_device_id: AudioDeviceID = 0;
+    let data_size = mem::size_of::<AudioDeviceID>();
+    let status = unsafe {
+        AudioObjectGetPropertyData(
+            kAudioObjectSystemObject,
+            &property_address as *const _,
+            0,
+            null(),
+            &data_size as *const _ as *mut _,
+            &audio_device_id as *const _ as *mut _,
+        )
+    };
+    if status != kAudioHardwareNoError as i32 {
+        return None;
+    }
+
+    let device = Device {
+        audio_device_id,
+        is_default: true,
+    };
+    Some(device)
+}
+
+pub fn default_output_device() -> Option<Device> {
+    let property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioHardwarePropertyDefaultOutputDevice,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+
+    let audio_device_id: AudioDeviceID = 0;
+    let data_size = mem::size_of::<AudioDeviceID>();
+    let status = unsafe {
+        AudioObjectGetPropertyData(
+            kAudioObjectSystemObject,
+            &property_address as *const _,
+            0,
+            null(),
+            &data_size as *const _ as *mut _,
+            &audio_device_id as *const _ as *mut _,
+        )
+    };
+    if status != kAudioHardwareNoError as i32 {
+        return None;
+    }
+
+    let device = Device {
+        audio_device_id,
+        is_default: true,
+    };
+    Some(device)
+}
+
+pub type SupportedInputConfigs = VecIntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = VecIntoIter<SupportedStreamConfigRange>;

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/macos/mod.rs

@@ -0,0 +1,948 @@
+extern crate core_foundation_sys;
+extern crate coreaudio;
+
+use super::{asbd_from_config, check_os_status, frames_to_duration, host_time_to_stream_instant};
+
+use self::core_foundation_sys::string::{CFStringGetCString, CFStringGetCStringPtr, CFStringRef};
+use self::coreaudio::audio_unit::render_callback::{self, data};
+use self::coreaudio::audio_unit::{AudioUnit, Element, Scope};
+use self::coreaudio::sys::{
+    kAudioDevicePropertyAvailableNominalSampleRates, kAudioDevicePropertyBufferFrameSize,
+    kAudioDevicePropertyBufferFrameSizeRange, kAudioDevicePropertyDeviceIsAlive,
+    kAudioDevicePropertyDeviceNameCFString, kAudioDevicePropertyNominalSampleRate,
+    kAudioDevicePropertyScopeOutput, kAudioDevicePropertyStreamConfiguration,
+    kAudioDevicePropertyStreamFormat, kAudioObjectPropertyElementMaster,
+    kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyScopeInput,
+    kAudioObjectPropertyScopeOutput, kAudioOutputUnitProperty_CurrentDevice,
+    kAudioOutputUnitProperty_EnableIO, kAudioUnitProperty_StreamFormat, kCFStringEncodingUTF8,
+    AudioBuffer, AudioBufferList, AudioDeviceID, AudioObjectGetPropertyData,
+    AudioObjectGetPropertyDataSize, AudioObjectID, AudioObjectPropertyAddress,
+    AudioObjectPropertyScope, AudioObjectSetPropertyData, AudioStreamBasicDescription,
+    AudioValueRange, OSStatus,
+};
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BackendSpecificError, BufferSize, BuildStreamError, ChannelCount, Data,
+    DefaultStreamConfigError, DeviceNameError, DevicesError, InputCallbackInfo, OutputCallbackInfo,
+    PauseStreamError, PlayStreamError, SampleFormat, SampleRate, StreamConfig, StreamError,
+    SupportedBufferSize, SupportedStreamConfig, SupportedStreamConfigRange,
+    SupportedStreamConfigsError,
+};
+use std::ffi::CStr;
+use std::fmt;
+use std::mem;
+use std::os::raw::c_char;
+use std::ptr::null;
+use std::slice;
+use std::sync::mpsc::{channel, RecvTimeoutError};
+use std::sync::{Arc, Mutex};
+use std::time::{Duration, Instant};
+
+pub use self::enumerate::{
+    default_input_device, default_output_device, Devices, SupportedInputConfigs,
+    SupportedOutputConfigs,
+};
+
+use property_listener::AudioObjectPropertyListener;
+
+pub mod enumerate;
+mod property_listener;
+
+/// Coreaudio host, the default host on macOS.
+#[derive(Debug)]
+pub struct Host;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        // Assume coreaudio is always available
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        default_input_device()
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        default_output_device()
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Device::name(self)
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Device::supported_input_configs(self)
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Device::supported_output_configs(self)
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_input_config(self)
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_output_config(self)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Device::build_input_stream_raw(
+            self,
+            config,
+            sample_format,
+            data_callback,
+            error_callback,
+            timeout,
+        )
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Device::build_output_stream_raw(
+            self,
+            config,
+            sample_format,
+            data_callback,
+            error_callback,
+            timeout,
+        )
+    }
+}
+
+#[derive(Clone, PartialEq, Eq)]
+pub struct Device {
+    pub(crate) audio_device_id: AudioDeviceID,
+    is_default: bool,
+}
+
+impl Device {
+    fn name(&self) -> Result<String, DeviceNameError> {
+        let property_address = AudioObjectPropertyAddress {
+            mSelector: kAudioDevicePropertyDeviceNameCFString,
+            mScope: kAudioDevicePropertyScopeOutput,
+            mElement: kAudioObjectPropertyElementMaster,
+        };
+        let device_name: CFStringRef = null();
+        let data_size = mem::size_of::<CFStringRef>();
+        let c_str = unsafe {
+            let status = AudioObjectGetPropertyData(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+                &device_name as *const _ as *mut _,
+            );
+            check_os_status(status)?;
+
+            let c_string: *const c_char = CFStringGetCStringPtr(device_name, kCFStringEncodingUTF8);
+            if c_string.is_null() {
+                let status = AudioObjectGetPropertyData(
+                    self.audio_device_id,
+                    &property_address as *const _,
+                    0,
+                    null(),
+                    &data_size as *const _ as *mut _,
+                    &device_name as *const _ as *mut _,
+                );
+                check_os_status(status)?;
+                let mut buf: [i8; 255] = [0; 255];
+                let result = CFStringGetCString(
+                    device_name,
+                    buf.as_mut_ptr(),
+                    buf.len() as _,
+                    kCFStringEncodingUTF8,
+                );
+                if result == 0 {
+                    let description =
+                        "core foundation failed to return device name string".to_string();
+                    let err = BackendSpecificError { description };
+                    return Err(err.into());
+                }
+                let name: &CStr = CStr::from_ptr(buf.as_ptr());
+                return Ok(name.to_str().unwrap().to_owned());
+            }
+            CStr::from_ptr(c_string as *mut _)
+        };
+        Ok(c_str.to_string_lossy().into_owned())
+    }
+
+    // Logic re-used between `supported_input_configs` and `supported_output_configs`.
+    #[allow(clippy::cast_ptr_alignment)]
+    fn supported_configs(
+        &self,
+        scope: AudioObjectPropertyScope,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        let mut property_address = AudioObjectPropertyAddress {
+            mSelector: kAudioDevicePropertyStreamConfiguration,
+            mScope: scope,
+            mElement: kAudioObjectPropertyElementMaster,
+        };
+
+        unsafe {
+            // Retrieve the devices audio buffer list.
+            let data_size = 0u32;
+            let status = AudioObjectGetPropertyDataSize(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+            );
+            check_os_status(status)?;
+
+            let mut audio_buffer_list: Vec<u8> = vec![];
+            audio_buffer_list.reserve_exact(data_size as usize);
+            let status = AudioObjectGetPropertyData(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+                audio_buffer_list.as_mut_ptr() as *mut _,
+            );
+            check_os_status(status)?;
+
+            let audio_buffer_list = audio_buffer_list.as_mut_ptr() as *mut AudioBufferList;
+
+            // If there's no buffers, skip.
+            if (*audio_buffer_list).mNumberBuffers == 0 {
+                return Ok(vec![].into_iter());
+            }
+
+            // Count the number of channels as the sum of all channels in all output buffers.
+            let n_buffers = (*audio_buffer_list).mNumberBuffers as usize;
+            let first: *const AudioBuffer = (*audio_buffer_list).mBuffers.as_ptr();
+            let buffers: &'static [AudioBuffer] = slice::from_raw_parts(first, n_buffers);
+            let mut n_channels = 0;
+            for buffer in buffers {
+                n_channels += buffer.mNumberChannels as usize;
+            }
+
+            // TODO: macOS should support U8, I16, I32, F32 and F64. This should allow for using
+            // I16 but just use F32 for now as it's the default anyway.
+            let sample_format = SampleFormat::F32;
+
+            // Get available sample rate ranges.
+            property_address.mSelector = kAudioDevicePropertyAvailableNominalSampleRates;
+            let data_size = 0u32;
+            let status = AudioObjectGetPropertyDataSize(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+            );
+            check_os_status(status)?;
+
+            let n_ranges = data_size as usize / mem::size_of::<AudioValueRange>();
+            let mut ranges: Vec<u8> = vec![];
+            ranges.reserve_exact(data_size as usize);
+            let status = AudioObjectGetPropertyData(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+                ranges.as_mut_ptr() as *mut _,
+            );
+            check_os_status(status)?;
+
+            let ranges: *mut AudioValueRange = ranges.as_mut_ptr() as *mut _;
+            let ranges: &'static [AudioValueRange] = slice::from_raw_parts(ranges, n_ranges);
+
+            let audio_unit = audio_unit_from_device(self, true)?;
+            let buffer_size = get_io_buffer_frame_size_range(&audio_unit)?;
+
+            // Collect the supported formats for the device.
+            let mut fmts = vec![];
+            for range in ranges {
+                let fmt = SupportedStreamConfigRange {
+                    channels: n_channels as ChannelCount,
+                    min_sample_rate: SampleRate(range.mMinimum as _),
+                    max_sample_rate: SampleRate(range.mMaximum as _),
+                    buffer_size,
+                    sample_format,
+                };
+                fmts.push(fmt);
+            }
+
+            Ok(fmts.into_iter())
+        }
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        self.supported_configs(kAudioObjectPropertyScopeInput)
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        self.supported_configs(kAudioObjectPropertyScopeOutput)
+    }
+
+    fn default_config(
+        &self,
+        scope: AudioObjectPropertyScope,
+    ) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        fn default_config_error_from_os_status(
+            status: OSStatus,
+        ) -> Result<(), DefaultStreamConfigError> {
+            let err = match coreaudio::Error::from_os_status(status) {
+                Err(err) => err,
+                Ok(_) => return Ok(()),
+            };
+            match err {
+                coreaudio::Error::AudioUnit(
+                    coreaudio::error::AudioUnitError::FormatNotSupported,
+                )
+                | coreaudio::Error::AudioCodec(_)
+                | coreaudio::Error::AudioFormat(_) => {
+                    Err(DefaultStreamConfigError::StreamTypeNotSupported)
+                }
+                coreaudio::Error::AudioUnit(coreaudio::error::AudioUnitError::NoConnection) => {
+                    Err(DefaultStreamConfigError::DeviceNotAvailable)
+                }
+                err => {
+                    let description = format!("{}", err);
+                    let err = BackendSpecificError { description };
+                    Err(err.into())
+                }
+            }
+        }
+
+        let property_address = AudioObjectPropertyAddress {
+            mSelector: kAudioDevicePropertyStreamFormat,
+            mScope: scope,
+            mElement: kAudioObjectPropertyElementMaster,
+        };
+
+        unsafe {
+            let asbd: AudioStreamBasicDescription = mem::zeroed();
+            let data_size = mem::size_of::<AudioStreamBasicDescription>() as u32;
+            let status = AudioObjectGetPropertyData(
+                self.audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+                &asbd as *const _ as *mut _,
+            );
+            default_config_error_from_os_status(status)?;
+
+            let sample_format = {
+                let audio_format = coreaudio::audio_unit::AudioFormat::from_format_and_flag(
+                    asbd.mFormatID,
+                    Some(asbd.mFormatFlags),
+                );
+                let flags = match audio_format {
+                    Some(coreaudio::audio_unit::AudioFormat::LinearPCM(flags)) => flags,
+                    _ => return Err(DefaultStreamConfigError::StreamTypeNotSupported),
+                };
+                let maybe_sample_format =
+                    coreaudio::audio_unit::SampleFormat::from_flags_and_bits_per_sample(
+                        flags,
+                        asbd.mBitsPerChannel,
+                    );
+                match maybe_sample_format {
+                    Some(coreaudio::audio_unit::SampleFormat::F32) => SampleFormat::F32,
+                    Some(coreaudio::audio_unit::SampleFormat::I16) => SampleFormat::I16,
+                    _ => return Err(DefaultStreamConfigError::StreamTypeNotSupported),
+                }
+            };
+
+            let audio_unit = audio_unit_from_device(self, true)?;
+            let buffer_size = get_io_buffer_frame_size_range(&audio_unit)?;
+
+            let config = SupportedStreamConfig {
+                sample_rate: SampleRate(asbd.mSampleRate as _),
+                channels: asbd.mChannelsPerFrame as _,
+                buffer_size,
+                sample_format,
+            };
+            Ok(config)
+        }
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        self.default_config(kAudioObjectPropertyScopeInput)
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        self.default_config(kAudioObjectPropertyScopeOutput)
+    }
+}
+
+impl fmt::Debug for Device {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("Device")
+            .field("audio_device_id", &self.audio_device_id)
+            .field("name", &self.name())
+            .finish()
+    }
+}
+
+struct StreamInner {
+    playing: bool,
+    audio_unit: AudioUnit,
+    /// Manage the lifetime of the closure that handles device disconnection.
+    _disconnect_listener: Option<AudioObjectPropertyListener>,
+    // Track the device with which the audio unit was spawned.
+    //
+    // We must do this so that we can avoid changing the device sample rate if there is already
+    // a stream associated with the device.
+    #[allow(dead_code)]
+    device_id: AudioDeviceID,
+}
+
+/// Register the on-disconnect callback.
+/// This will both stop the stream and call the error callback with DeviceNotAvailable.
+/// This function should only be called once per stream.
+fn add_disconnect_listener<E>(
+    stream: &Stream,
+    error_callback: Arc<Mutex<E>>,
+) -> Result<(), BuildStreamError>
+where
+    E: FnMut(StreamError) + Send + 'static,
+{
+    let stream_copy = stream.clone();
+    let mut stream_inner = stream.inner.lock().unwrap();
+    stream_inner._disconnect_listener = Some(AudioObjectPropertyListener::new(
+        stream_inner.device_id,
+        AudioObjectPropertyAddress {
+            mSelector: kAudioDevicePropertyDeviceIsAlive,
+            mScope: kAudioObjectPropertyScopeGlobal,
+            mElement: kAudioObjectPropertyElementMaster,
+        },
+        move || {
+            let _ = stream_copy.pause();
+            (error_callback.lock().unwrap())(StreamError::DeviceNotAvailable);
+        },
+    )?);
+    Ok(())
+}
+
+fn audio_unit_from_device(device: &Device, input: bool) -> Result<AudioUnit, coreaudio::Error> {
+    // Psysonic patch (macOS mic-prompt suppression):
+    // Always use DefaultOutput for output streams, regardless of whether
+    // `device` is flagged as the default. HalOutput instantiation triggers
+    // macOS TCC microphone-permission prompts even for playback-only apps.
+    // DefaultOutput never touches input and never prompts for mic access.
+    // Consequence: per-device output selection is a no-op on macOS — the
+    // stream follows the system default. This matches Apple Music/Spotify
+    // behaviour and is surfaced to the user in the Settings UI.
+    let output_type = if !input {
+        coreaudio::audio_unit::IOType::DefaultOutput
+    } else {
+        coreaudio::audio_unit::IOType::HalOutput
+    };
+    let mut audio_unit = AudioUnit::new(output_type)?;
+
+    if input {
+        // Enable input processing.
+        let enable_input = 1u32;
+        audio_unit.set_property(
+            kAudioOutputUnitProperty_EnableIO,
+            Scope::Input,
+            Element::Input,
+            Some(&enable_input),
+        )?;
+
+        // Disable output processing.
+        let disable_output = 0u32;
+        audio_unit.set_property(
+            kAudioOutputUnitProperty_EnableIO,
+            Scope::Output,
+            Element::Output,
+            Some(&disable_output),
+        )?;
+    }
+
+    audio_unit.set_property(
+        kAudioOutputUnitProperty_CurrentDevice,
+        Scope::Global,
+        Element::Output,
+        Some(&device.audio_device_id),
+    )?;
+
+    Ok(audio_unit)
+}
+
+impl Device {
+    #[allow(clippy::cast_ptr_alignment)]
+    #[allow(clippy::while_immutable_condition)]
+    #[allow(clippy::float_cmp)]
+    fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        // The scope and element for working with a device's input stream.
+        let scope = Scope::Output;
+        let element = Element::Input;
+
+        // Potentially change the device sample rate to match the config.
+        set_sample_rate(self.audio_device_id, config.sample_rate)?;
+
+        let mut audio_unit = audio_unit_from_device(self, true)?;
+
+        // Set the stream in interleaved mode.
+        let asbd = asbd_from_config(config, sample_format);
+        audio_unit.set_property(kAudioUnitProperty_StreamFormat, scope, element, Some(&asbd))?;
+
+        // Set the buffersize
+        match config.buffer_size {
+            BufferSize::Fixed(v) => {
+                let buffer_size_range = get_io_buffer_frame_size_range(&audio_unit)?;
+                match buffer_size_range {
+                    SupportedBufferSize::Range { min, max } => {
+                        if v >= min && v <= max {
+                            audio_unit.set_property(
+                                kAudioDevicePropertyBufferFrameSize,
+                                scope,
+                                element,
+                                Some(&v),
+                            )?
+                        } else {
+                            return Err(BuildStreamError::StreamConfigNotSupported);
+                        }
+                    }
+                    SupportedBufferSize::Unknown => (),
+                }
+            }
+            BufferSize::Default => (),
+        }
+
+        let error_callback = Arc::new(Mutex::new(error_callback));
+        let error_callback_disconnect = error_callback.clone();
+
+        // Register the callback that is being called by coreaudio whenever it needs data to be
+        // fed to the audio buffer.
+        let bytes_per_channel = sample_format.sample_size();
+        let sample_rate = config.sample_rate;
+        type Args = render_callback::Args<data::Raw>;
+        audio_unit.set_input_callback(move |args: Args| unsafe {
+            let ptr = (*args.data.data).mBuffers.as_ptr();
+            let len = (*args.data.data).mNumberBuffers as usize;
+            let buffers: &[AudioBuffer] = slice::from_raw_parts(ptr, len);
+
+            // TODO: Perhaps loop over all buffers instead?
+            let AudioBuffer {
+                mNumberChannels: channels,
+                mDataByteSize: data_byte_size,
+                mData: data,
+            } = buffers[0];
+
+            let data = data as *mut ();
+            let len = data_byte_size as usize / bytes_per_channel;
+            let data = Data::from_parts(data, len, sample_format);
+
+            // TODO: Need a better way to get delay, for now we assume a double-buffer offset.
+            let callback = match host_time_to_stream_instant(args.time_stamp.mHostTime) {
+                Err(err) => {
+                    (error_callback.lock().unwrap())(err.into());
+                    return Err(());
+                }
+                Ok(cb) => cb,
+            };
+            let buffer_frames = len / channels as usize;
+            let delay = frames_to_duration(buffer_frames, sample_rate);
+            let capture = callback
+                .sub(delay)
+                .expect("`capture` occurs before origin of alsa `StreamInstant`");
+            let timestamp = crate::InputStreamTimestamp { callback, capture };
+
+            let info = InputCallbackInfo { timestamp };
+            data_callback(&data, &info);
+            Ok(())
+        })?;
+
+        let stream = Stream::new(StreamInner {
+            playing: true,
+            _disconnect_listener: None,
+            audio_unit,
+            device_id: self.audio_device_id,
+        });
+
+        // If we didn't request the default device, stop the stream if the
+        // device disconnects.
+        if !self.is_default {
+            add_disconnect_listener(&stream, error_callback_disconnect)?;
+        }
+
+        stream.inner.lock().unwrap().audio_unit.start()?;
+
+        Ok(stream)
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        mut data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let mut audio_unit = audio_unit_from_device(self, false)?;
+
+        // The scope and element for working with a device's output stream.
+        let scope = Scope::Input;
+        let element = Element::Output;
+
+        // Set the stream in interleaved mode.
+        let asbd = asbd_from_config(config, sample_format);
+        audio_unit.set_property(kAudioUnitProperty_StreamFormat, scope, element, Some(&asbd))?;
+
+        // Set the buffersize
+        match config.buffer_size {
+            BufferSize::Fixed(v) => {
+                let buffer_size_range = get_io_buffer_frame_size_range(&audio_unit)?;
+                match buffer_size_range {
+                    SupportedBufferSize::Range { min, max } => {
+                        if v >= min && v <= max {
+                            audio_unit.set_property(
+                                kAudioDevicePropertyBufferFrameSize,
+                                scope,
+                                element,
+                                Some(&v),
+                            )?
+                        } else {
+                            return Err(BuildStreamError::StreamConfigNotSupported);
+                        }
+                    }
+                    SupportedBufferSize::Unknown => (),
+                }
+            }
+            BufferSize::Default => (),
+        }
+
+        let error_callback = Arc::new(Mutex::new(error_callback));
+        let error_callback_disconnect = error_callback.clone();
+
+        // Register the callback that is being called by coreaudio whenever it needs data to be
+        // fed to the audio buffer.
+        let bytes_per_channel = sample_format.sample_size();
+        let sample_rate = config.sample_rate;
+        type Args = render_callback::Args<data::Raw>;
+        audio_unit.set_render_callback(move |args: Args| unsafe {
+            // If `run()` is currently running, then a callback will be available from this list.
+            // Otherwise, we just fill the buffer with zeroes and return.
+
+            let AudioBuffer {
+                mNumberChannels: channels,
+                mDataByteSize: data_byte_size,
+                mData: data,
+            } = (*args.data.data).mBuffers[0];
+
+            let data = data as *mut ();
+            let len = data_byte_size as usize / bytes_per_channel;
+            let mut data = Data::from_parts(data, len, sample_format);
+
+            let callback = match host_time_to_stream_instant(args.time_stamp.mHostTime) {
+                Err(err) => {
+                    (error_callback.lock().unwrap())(err.into());
+                    return Err(());
+                }
+                Ok(cb) => cb,
+            };
+            // TODO: Need a better way to get delay, for now we assume a double-buffer offset.
+            let buffer_frames = len / channels as usize;
+            let delay = frames_to_duration(buffer_frames, sample_rate);
+            let playback = callback
+                .add(delay)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let timestamp = crate::OutputStreamTimestamp { callback, playback };
+
+            let info = OutputCallbackInfo { timestamp };
+            data_callback(&mut data, &info);
+            Ok(())
+        })?;
+
+        let stream = Stream::new(StreamInner {
+            playing: true,
+            _disconnect_listener: None,
+            audio_unit,
+            device_id: self.audio_device_id,
+        });
+
+        // If we didn't request the default device, stop the stream if the
+        // device disconnects.
+        if !self.is_default {
+            add_disconnect_listener(&stream, error_callback_disconnect)?;
+        }
+
+        stream.inner.lock().unwrap().audio_unit.start()?;
+
+        Ok(stream)
+    }
+}
+
+/// Attempt to set the device sample rate to the provided rate.
+/// Return an error if the requested sample rate is not supported by the device.
+fn set_sample_rate(
+    audio_device_id: AudioObjectID,
+    target_sample_rate: SampleRate,
+) -> Result<(), BuildStreamError> {
+    // Get the current sample rate.
+    let mut property_address = AudioObjectPropertyAddress {
+        mSelector: kAudioDevicePropertyNominalSampleRate,
+        mScope: kAudioObjectPropertyScopeGlobal,
+        mElement: kAudioObjectPropertyElementMaster,
+    };
+    let sample_rate: f64 = 0.0;
+    let data_size = mem::size_of::<f64>() as u32;
+    let status = unsafe {
+        AudioObjectGetPropertyData(
+            audio_device_id,
+            &property_address as *const _,
+            0,
+            null(),
+            &data_size as *const _ as *mut _,
+            &sample_rate as *const _ as *mut _,
+        )
+    };
+    coreaudio::Error::from_os_status(status)?;
+
+    // If the requested sample rate is different to the device sample rate, update the device.
+    if sample_rate as u32 != target_sample_rate.0 {
+        // Get available sample rate ranges.
+        property_address.mSelector = kAudioDevicePropertyAvailableNominalSampleRates;
+        let data_size = 0u32;
+        let status = unsafe {
+            AudioObjectGetPropertyDataSize(
+                audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+            )
+        };
+        coreaudio::Error::from_os_status(status)?;
+        let n_ranges = data_size as usize / mem::size_of::<AudioValueRange>();
+        let mut ranges: Vec<u8> = vec![];
+        ranges.reserve_exact(data_size as usize);
+        let status = unsafe {
+            AudioObjectGetPropertyData(
+                audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                &data_size as *const _ as *mut _,
+                ranges.as_mut_ptr() as *mut _,
+            )
+        };
+        coreaudio::Error::from_os_status(status)?;
+        let ranges: *mut AudioValueRange = ranges.as_mut_ptr() as *mut _;
+        let ranges: &'static [AudioValueRange] = unsafe { slice::from_raw_parts(ranges, n_ranges) };
+
+        // Now that we have the available ranges, pick the one matching the desired rate.
+        let sample_rate = target_sample_rate.0;
+        let maybe_index = ranges
+            .iter()
+            .position(|r| r.mMinimum as u32 == sample_rate && r.mMaximum as u32 == sample_rate);
+        let range_index = match maybe_index {
+            None => return Err(BuildStreamError::StreamConfigNotSupported),
+            Some(i) => i,
+        };
+
+        let (send, recv) = channel::<Result<f64, coreaudio::Error>>();
+        let sample_rate_address = AudioObjectPropertyAddress {
+            mSelector: kAudioDevicePropertyNominalSampleRate,
+            mScope: kAudioObjectPropertyScopeGlobal,
+            mElement: kAudioObjectPropertyElementMaster,
+        };
+        // Send sample rate updates back on a channel.
+        let sample_rate_handler = move || {
+            let mut rate: f64 = 0.0;
+            let data_size = mem::size_of::<f64>();
+
+            let result = unsafe {
+                AudioObjectGetPropertyData(
+                    audio_device_id,
+                    &sample_rate_address as *const _,
+                    0,
+                    null(),
+                    &data_size as *const _ as *mut _,
+                    &mut rate as *const _ as *mut _,
+                )
+            };
+            send.send(coreaudio::Error::from_os_status(result).map(|_| rate))
+                .ok();
+        };
+
+        let listener = AudioObjectPropertyListener::new(
+            audio_device_id,
+            sample_rate_address,
+            sample_rate_handler,
+        )?;
+
+        // Finally, set the sample rate.
+        property_address.mSelector = kAudioDevicePropertyNominalSampleRate;
+        let status = unsafe {
+            AudioObjectSetPropertyData(
+                audio_device_id,
+                &property_address as *const _,
+                0,
+                null(),
+                data_size,
+                &ranges[range_index] as *const _ as *const _,
+            )
+        };
+        coreaudio::Error::from_os_status(status)?;
+
+        // Wait for the reported_rate to change.
+        //
+        // This should not take longer than a few ms, but we timeout after 1 sec just in case.
+        // We loop over potentially several events from the channel to ensure
+        // that we catch the expected change in sample rate.
+        let mut timeout = Duration::from_secs(1);
+        let start = Instant::now();
+
+        loop {
+            match recv.recv_timeout(timeout) {
+                Err(err) => {
+                    let description = match err {
+                        RecvTimeoutError::Disconnected => {
+                            "sample rate listener channel disconnected unexpectedly"
+                        }
+                        RecvTimeoutError::Timeout => {
+                            "timeout waiting for sample rate update for device"
+                        }
+                    }
+                    .to_string();
+                    return Err(BackendSpecificError { description }.into());
+                }
+                Ok(Ok(reported_sample_rate)) => {
+                    if reported_sample_rate == target_sample_rate.0 as f64 {
+                        break;
+                    }
+                }
+                Ok(Err(_)) => {
+                    // TODO: should we consider collecting this error?
+                }
+            };
+            timeout = timeout
+                .checked_sub(start.elapsed())
+                .unwrap_or(Duration::ZERO);
+        }
+        listener.remove()?;
+    }
+    Ok(())
+}
+
+#[derive(Clone)]
+pub struct Stream {
+    inner: Arc<Mutex<StreamInner>>,
+}
+
+impl Stream {
+    fn new(inner: StreamInner) -> Self {
+        Self {
+            inner: Arc::new(Mutex::new(inner)),
+        }
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        let mut stream = self.inner.lock().unwrap();
+
+        if !stream.playing {
+            if let Err(e) = stream.audio_unit.start() {
+                let description = format!("{}", e);
+                let err = BackendSpecificError { description };
+                return Err(err.into());
+            }
+            stream.playing = true;
+        }
+        Ok(())
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        let mut stream = self.inner.lock().unwrap();
+
+        if stream.playing {
+            if let Err(e) = stream.audio_unit.stop() {
+                let description = format!("{}", e);
+                let err = BackendSpecificError { description };
+                return Err(err.into());
+            }
+
+            stream.playing = false;
+        }
+        Ok(())
+    }
+}
+
+fn get_io_buffer_frame_size_range(
+    audio_unit: &AudioUnit,
+) -> Result<SupportedBufferSize, coreaudio::Error> {
+    let buffer_size_range: AudioValueRange = audio_unit.get_property(
+        kAudioDevicePropertyBufferFrameSizeRange,
+        Scope::Global,
+        Element::Output,
+    )?;
+
+    Ok(SupportedBufferSize::Range {
+        min: buffer_size_range.mMinimum as u32,
+        max: buffer_size_range.mMaximum as u32,
+    })
+}

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/macos/property_listener.rs

@@ -0,0 +1,85 @@
+//! Helper code for registering audio object property listeners.
+use super::coreaudio::sys::{
+    AudioObjectAddPropertyListener, AudioObjectID, AudioObjectPropertyAddress,
+    AudioObjectRemovePropertyListener, OSStatus,
+};
+
+use crate::BuildStreamError;
+
+/// A double-indirection to be able to pass a closure (a fat pointer)
+/// via a single c_void.
+struct PropertyListenerCallbackWrapper(Box<dyn FnMut()>);
+
+/// Maintain an audio object property listener.
+/// The listener will be removed when this type is dropped.
+pub struct AudioObjectPropertyListener {
+    callback: Box<PropertyListenerCallbackWrapper>,
+    property_address: AudioObjectPropertyAddress,
+    audio_object_id: AudioObjectID,
+    removed: bool,
+}
+
+impl AudioObjectPropertyListener {
+    /// Attach the provided callback as a audio object property listener.
+    pub fn new<F: FnMut() + 'static>(
+        audio_object_id: AudioObjectID,
+        property_address: AudioObjectPropertyAddress,
+        callback: F,
+    ) -> Result<Self, BuildStreamError> {
+        let callback = Box::new(PropertyListenerCallbackWrapper(Box::new(callback)));
+        unsafe {
+            coreaudio::Error::from_os_status(AudioObjectAddPropertyListener(
+                audio_object_id,
+                &property_address as *const _,
+                Some(property_listener_handler_shim),
+                &*callback as *const _ as *mut _,
+            ))?;
+        };
+        Ok(Self {
+            callback,
+            audio_object_id,
+            property_address,
+            removed: false,
+        })
+    }
+
+    /// Explicitly remove the property listener.
+    /// Use this method if you need to explicitly handle failure to remove
+    /// the property listener.
+    pub fn remove(mut self) -> Result<(), BuildStreamError> {
+        self.remove_inner()
+    }
+
+    fn remove_inner(&mut self) -> Result<(), BuildStreamError> {
+        unsafe {
+            coreaudio::Error::from_os_status(AudioObjectRemovePropertyListener(
+                self.audio_object_id,
+                &self.property_address as *const _,
+                Some(property_listener_handler_shim),
+                &*self.callback as *const _ as *mut _,
+            ))?;
+        }
+        self.removed = true;
+        Ok(())
+    }
+}
+
+impl Drop for AudioObjectPropertyListener {
+    fn drop(&mut self) {
+        if !self.removed {
+            let _ = self.remove_inner();
+        }
+    }
+}
+
+/// Callback used to call user-provided closure as a property listener.
+unsafe extern "C" fn property_listener_handler_shim(
+    _: AudioObjectID,
+    _: u32,
+    _: *const AudioObjectPropertyAddress,
+    callback: *mut ::std::os::raw::c_void,
+) -> OSStatus {
+    let wrapper = callback as *mut PropertyListenerCallbackWrapper;
+    (*wrapper).0();
+    0
+}

src-tauri/patches/cpal-0.15.3/src/host/coreaudio/mod.rs

@@ -0,0 +1,121 @@
+extern crate coreaudio;
+
+use self::coreaudio::sys::{
+    kAudioFormatFlagIsFloat, kAudioFormatFlagIsPacked, kAudioFormatLinearPCM,
+    AudioStreamBasicDescription, OSStatus,
+};
+
+use crate::DefaultStreamConfigError;
+use crate::{BuildStreamError, SupportedStreamConfigsError};
+
+use crate::{BackendSpecificError, SampleFormat, StreamConfig};
+
+#[cfg(target_os = "ios")]
+mod ios;
+#[cfg(target_os = "macos")]
+mod macos;
+
+#[cfg(target_os = "ios")]
+pub use self::ios::{
+    enumerate::{Devices, SupportedInputConfigs, SupportedOutputConfigs},
+    Device, Host, Stream,
+};
+
+#[cfg(target_os = "macos")]
+pub use self::macos::{
+    enumerate::{Devices, SupportedInputConfigs, SupportedOutputConfigs},
+    Device, Host, Stream,
+};
+
+/// Common helper methods used by both macOS and iOS
+
+fn check_os_status(os_status: OSStatus) -> Result<(), BackendSpecificError> {
+    match coreaudio::Error::from_os_status(os_status) {
+        Ok(()) => Ok(()),
+        Err(err) => {
+            let description = err.to_string();
+            Err(BackendSpecificError { description })
+        }
+    }
+}
+
+// Create a coreaudio AudioStreamBasicDescription from a CPAL Format.
+fn asbd_from_config(
+    config: &StreamConfig,
+    sample_format: SampleFormat,
+) -> AudioStreamBasicDescription {
+    let n_channels = config.channels as usize;
+    let sample_rate = config.sample_rate.0;
+    let bytes_per_channel = sample_format.sample_size();
+    let bits_per_channel = bytes_per_channel * 8;
+    let bytes_per_frame = n_channels * bytes_per_channel;
+    let frames_per_packet = 1;
+    let bytes_per_packet = frames_per_packet * bytes_per_frame;
+    let format_flags = match sample_format {
+        SampleFormat::F32 => kAudioFormatFlagIsFloat | kAudioFormatFlagIsPacked,
+        _ => kAudioFormatFlagIsPacked,
+    };
+    AudioStreamBasicDescription {
+        mBitsPerChannel: bits_per_channel as _,
+        mBytesPerFrame: bytes_per_frame as _,
+        mChannelsPerFrame: n_channels as _,
+        mBytesPerPacket: bytes_per_packet as _,
+        mFramesPerPacket: frames_per_packet as _,
+        mFormatFlags: format_flags,
+        mFormatID: kAudioFormatLinearPCM,
+        mSampleRate: sample_rate as _,
+        ..Default::default()
+    }
+}
+
+fn host_time_to_stream_instant(
+    m_host_time: u64,
+) -> Result<crate::StreamInstant, BackendSpecificError> {
+    let mut info: mach2::mach_time::mach_timebase_info = Default::default();
+    let res = unsafe { mach2::mach_time::mach_timebase_info(&mut info) };
+    check_os_status(res)?;
+    let nanos = m_host_time * info.numer as u64 / info.denom as u64;
+    let secs = nanos / 1_000_000_000;
+    let subsec_nanos = nanos - secs * 1_000_000_000;
+    Ok(crate::StreamInstant::new(secs as i64, subsec_nanos as u32))
+}
+
+// Convert the given duration in frames at the given sample rate to a `std::time::Duration`.
+fn frames_to_duration(frames: usize, rate: crate::SampleRate) -> std::time::Duration {
+    let secsf = frames as f64 / rate.0 as f64;
+    let secs = secsf as u64;
+    let nanos = ((secsf - secs as f64) * 1_000_000_000.0) as u32;
+    std::time::Duration::new(secs, nanos)
+}
+
+// TODO need stronger error identification
+impl From<coreaudio::Error> for BuildStreamError {
+    fn from(err: coreaudio::Error) -> BuildStreamError {
+        match err {
+            coreaudio::Error::RenderCallbackBufferFormatDoesNotMatchAudioUnitStreamFormat
+            | coreaudio::Error::NoKnownSubtype
+            | coreaudio::Error::AudioUnit(coreaudio::error::AudioUnitError::FormatNotSupported)
+            | coreaudio::Error::AudioCodec(_)
+            | coreaudio::Error::AudioFormat(_) => BuildStreamError::StreamConfigNotSupported,
+            _ => BuildStreamError::DeviceNotAvailable,
+        }
+    }
+}
+
+impl From<coreaudio::Error> for SupportedStreamConfigsError {
+    fn from(err: coreaudio::Error) -> SupportedStreamConfigsError {
+        let description = format!("{}", err);
+        let err = BackendSpecificError { description };
+        // Check for possible DeviceNotAvailable variant
+        SupportedStreamConfigsError::BackendSpecific { err }
+    }
+}
+
+impl From<coreaudio::Error> for DefaultStreamConfigError {
+    fn from(err: coreaudio::Error) -> DefaultStreamConfigError {
+        let description = format!("{}", err);
+        let err = BackendSpecificError { description };
+        // Check for possible DeviceNotAvailable variant
+        DefaultStreamConfigError::BackendSpecific { err }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/emscripten/mod.rs

@@ -0,0 +1,422 @@
+use js_sys::Float32Array;
+use std::time::Duration;
+use wasm_bindgen::prelude::*;
+use wasm_bindgen::JsCast;
+use wasm_bindgen_futures::{spawn_local, JsFuture};
+use web_sys::AudioContext;
+
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BufferSize, BuildStreamError, Data, DefaultStreamConfigError, DeviceNameError, DevicesError,
+    InputCallbackInfo, OutputCallbackInfo, PauseStreamError, PlayStreamError, SampleFormat,
+    SampleRate, StreamConfig, StreamError, SupportedBufferSize, SupportedStreamConfig,
+    SupportedStreamConfigRange, SupportedStreamConfigsError,
+};
+
+// The emscripten backend currently works by instantiating an `AudioContext` object per `Stream`.
+// Creating a stream creates a new `AudioContext`. Destroying a stream destroys it. Creation of a
+// `Host` instance initializes the `stdweb` context.
+
+/// The default emscripten host type.
+#[derive(Debug)]
+pub struct Host;
+
+/// Content is false if the iterator is empty.
+pub struct Devices(bool);
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Device;
+
+#[wasm_bindgen]
+#[derive(Clone)]
+pub struct Stream {
+    // A reference to an `AudioContext` object.
+    audio_ctxt: AudioContext,
+}
+
+// Index within the `streams` array of the events loop.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct StreamId(usize);
+
+pub type SupportedInputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+
+const MIN_CHANNELS: u16 = 1;
+const MAX_CHANNELS: u16 = 32;
+const MIN_SAMPLE_RATE: SampleRate = SampleRate(8_000);
+const MAX_SAMPLE_RATE: SampleRate = SampleRate(96_000);
+const DEFAULT_SAMPLE_RATE: SampleRate = SampleRate(44_100);
+const MIN_BUFFER_SIZE: u32 = 1;
+const MAX_BUFFER_SIZE: u32 = u32::MAX;
+const DEFAULT_BUFFER_SIZE: usize = 2048;
+const SUPPORTED_SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl Devices {
+    fn new() -> Result<Self, DevicesError> {
+        Ok(Self::default())
+    }
+}
+
+impl Device {
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Ok("Default Device".to_owned())
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedInputConfigs, SupportedStreamConfigsError> {
+        unimplemented!();
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        let buffer_size = SupportedBufferSize::Range {
+            min: MIN_BUFFER_SIZE,
+            max: MAX_BUFFER_SIZE,
+        };
+        let configs: Vec<_> = (MIN_CHANNELS..=MAX_CHANNELS)
+            .map(|channels| SupportedStreamConfigRange {
+                channels,
+                min_sample_rate: MIN_SAMPLE_RATE,
+                max_sample_rate: MAX_SAMPLE_RATE,
+                buffer_size: buffer_size.clone(),
+                sample_format: SUPPORTED_SAMPLE_FORMAT,
+            })
+            .collect();
+        Ok(configs.into_iter())
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        unimplemented!();
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        const EXPECT: &str = "expected at least one valid webaudio stream config";
+        let config = self
+            .supported_output_configs()
+            .expect(EXPECT)
+            .max_by(|a, b| a.cmp_default_heuristics(b))
+            .unwrap()
+            .with_sample_rate(DEFAULT_SAMPLE_RATE);
+
+        Ok(config)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        // Assume this host is always available on emscripten.
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        default_input_device()
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        default_output_device()
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Device::name(self)
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Device::supported_input_configs(self)
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Device::supported_output_configs(self)
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_input_config(self)
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_output_config(self)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        _config: &StreamConfig,
+        _sample_format: SampleFormat,
+        _data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        unimplemented!()
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        if !valid_config(config, sample_format) {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+
+        let buffer_size_frames = match config.buffer_size {
+            BufferSize::Fixed(v) => {
+                if v == 0 {
+                    return Err(BuildStreamError::StreamConfigNotSupported);
+                } else {
+                    v as usize
+                }
+            }
+            BufferSize::Default => DEFAULT_BUFFER_SIZE,
+        };
+
+        // Create the stream.
+        let audio_ctxt = AudioContext::new().expect("webaudio is not present on this system");
+        let stream = Stream { audio_ctxt };
+
+        // Use `set_timeout` to invoke a Rust callback repeatedly.
+        //
+        // The job of this callback is to fill the content of the audio buffers.
+        //
+        // See also: The call to `set_timeout` at the end of the `audio_callback_fn` which creates
+        // the loop.
+        set_timeout(
+            10,
+            stream.clone(),
+            data_callback,
+            config,
+            sample_format,
+            buffer_size_frames as u32,
+        );
+
+        Ok(stream)
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        let future = JsFuture::from(
+            self.audio_ctxt
+                .resume()
+                .expect("Could not resume the stream"),
+        );
+        spawn_local(async {
+            match future.await {
+                Ok(value) => assert!(value.is_undefined()),
+                Err(value) => panic!("AudioContext.resume() promise was rejected: {:?}", value),
+            }
+        });
+        Ok(())
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        let future = JsFuture::from(
+            self.audio_ctxt
+                .suspend()
+                .expect("Could not suspend the stream"),
+        );
+        spawn_local(async {
+            match future.await {
+                Ok(value) => assert!(value.is_undefined()),
+                Err(value) => panic!("AudioContext.suspend() promise was rejected: {:?}", value),
+            }
+        });
+        Ok(())
+    }
+}
+
+fn audio_callback_fn<D>(
+    mut data_callback: D,
+) -> impl FnOnce(Stream, StreamConfig, SampleFormat, u32)
+where
+    D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+{
+    |stream, config, sample_format, buffer_size_frames| {
+        let sample_rate = config.sample_rate.0;
+        let buffer_size_samples = buffer_size_frames * config.channels as u32;
+        let audio_ctxt = &stream.audio_ctxt;
+
+        // TODO: We should be re-using a buffer.
+        let mut temporary_buffer = vec![0f32; buffer_size_samples as usize];
+
+        {
+            let len = temporary_buffer.len();
+            let data = temporary_buffer.as_mut_ptr() as *mut ();
+            let mut data = unsafe { Data::from_parts(data, len, sample_format) };
+            let now_secs: f64 = audio_ctxt.current_time();
+            let callback = crate::StreamInstant::from_secs_f64(now_secs);
+            // TODO: Use proper latency instead. Currently, unsupported on most browsers though, so
+            // we estimate based on buffer size instead. Probably should use this, but it's only
+            // supported by firefox (2020-04-28).
+            // let latency_secs: f64 = audio_ctxt.outputLatency.try_into().unwrap();
+            let buffer_duration = frames_to_duration(len, sample_rate as usize);
+            let playback = callback
+                .add(buffer_duration)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let timestamp = crate::OutputStreamTimestamp { callback, playback };
+            let info = OutputCallbackInfo { timestamp };
+            data_callback(&mut data, &info);
+        }
+
+        let typed_array: Float32Array = temporary_buffer.as_slice().into();
+
+        debug_assert_eq!(temporary_buffer.len() % config.channels as usize, 0);
+
+        let src_buffer = Float32Array::new(typed_array.buffer().as_ref());
+        let context = audio_ctxt;
+        let buffer = context
+            .create_buffer(
+                config.channels as u32,
+                buffer_size_frames as u32,
+                sample_rate as f32,
+            )
+            .expect("Buffer could not be created");
+        for channel in 0..config.channels {
+            let mut buffer_content = buffer
+                .get_channel_data(channel as u32)
+                .expect("Should be impossible");
+            for (i, buffer_content_item) in buffer_content.iter_mut().enumerate() {
+                *buffer_content_item =
+                    src_buffer.get_index(i as u32 * config.channels as u32 + channel as u32);
+            }
+        }
+
+        let node = context
+            .create_buffer_source()
+            .expect("The buffer source node could not be created");
+        node.set_buffer(Some(&buffer));
+        context
+            .destination()
+            .connect_with_audio_node(&node)
+            .expect("Could not connect the audio node to the destination");
+        node.start().expect("Could not start the audio node");
+
+        // TODO: handle latency better ; right now we just use setInterval with the amount of sound
+        // data that is in each buffer ; this is obviously bad, and also the schedule is too tight
+        // and there may be underflows
+        set_timeout(
+            1000 * buffer_size_frames as i32 / sample_rate as i32,
+            stream.clone().clone(),
+            data_callback,
+            &config,
+            sample_format,
+            buffer_size_frames as u32,
+        );
+    }
+}
+
+fn set_timeout<D>(
+    time: i32,
+    stream: Stream,
+    data_callback: D,
+    config: &StreamConfig,
+    sample_format: SampleFormat,
+    buffer_size_frames: u32,
+) where
+    D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+{
+    let window = web_sys::window().expect("Not in a window somehow?");
+    window
+        .set_timeout_with_callback_and_timeout_and_arguments_4(
+            &Closure::once_into_js(audio_callback_fn(data_callback))
+                .dyn_ref::<js_sys::Function>()
+                .expect("The function was somehow not a function"),
+            time,
+            &stream.into(),
+            &((*config).clone()).into(),
+            &Closure::once_into_js(move || sample_format),
+            &buffer_size_frames.into(),
+        )
+        .expect("The timeout could not be set");
+}
+
+impl Default for Devices {
+    fn default() -> Devices {
+        // We produce an empty iterator if the WebAudio API isn't available.
+        Devices(is_webaudio_available())
+    }
+}
+impl Iterator for Devices {
+    type Item = Device;
+    #[inline]
+    fn next(&mut self) -> Option<Device> {
+        if self.0 {
+            self.0 = false;
+            Some(Device)
+        } else {
+            None
+        }
+    }
+}
+
+#[inline]
+fn default_input_device() -> Option<Device> {
+    unimplemented!();
+}
+
+#[inline]
+fn default_output_device() -> Option<Device> {
+    if is_webaudio_available() {
+        Some(Device)
+    } else {
+        None
+    }
+}
+
+// Detects whether the `AudioContext` global variable is available.
+fn is_webaudio_available() -> bool {
+    AudioContext::new().is_ok()
+}
+
+// Whether or not the given stream configuration is valid for building a stream.
+fn valid_config(conf: &StreamConfig, sample_format: SampleFormat) -> bool {
+    conf.channels <= MAX_CHANNELS
+        && conf.channels >= MIN_CHANNELS
+        && conf.sample_rate <= MAX_SAMPLE_RATE
+        && conf.sample_rate >= MIN_SAMPLE_RATE
+        && sample_format == SUPPORTED_SAMPLE_FORMAT
+}
+
+// Convert the given duration in frames at the given sample rate to a `std::time::Duration`.
+fn frames_to_duration(frames: usize, rate: usize) -> std::time::Duration {
+    let secsf = frames as f64 / rate as f64;
+    let secs = secsf as u64;
+    let nanos = ((secsf - secs as f64) * 1_000_000_000.0) as u32;
+    std::time::Duration::new(secs, nanos)
+}

src-tauri/patches/cpal-0.15.3/src/host/jack/device.rs

@@ -0,0 +1,268 @@
+use crate::traits::DeviceTrait;
+use crate::{
+    BackendSpecificError, BuildStreamError, Data, DefaultStreamConfigError, DeviceNameError,
+    InputCallbackInfo, OutputCallbackInfo, SampleFormat, SampleRate, StreamConfig, StreamError,
+    SupportedBufferSize, SupportedStreamConfig, SupportedStreamConfigRange,
+    SupportedStreamConfigsError,
+};
+use std::hash::{Hash, Hasher};
+use std::time::Duration;
+
+use super::stream::Stream;
+use super::JACK_SAMPLE_FORMAT;
+
+pub type SupportedInputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+
+const DEFAULT_NUM_CHANNELS: u16 = 2;
+const DEFAULT_SUPPORTED_CHANNELS: [u16; 10] = [1, 2, 4, 6, 8, 16, 24, 32, 48, 64];
+
+/// If a device is for input or output.
+/// Until we have duplex stream support JACK clients and CPAL devices for JACK will be either input or output.
+#[derive(Clone, Debug)]
+pub enum DeviceType {
+    InputDevice,
+    OutputDevice,
+}
+#[derive(Clone, Debug)]
+pub struct Device {
+    name: String,
+    sample_rate: SampleRate,
+    buffer_size: SupportedBufferSize,
+    device_type: DeviceType,
+    start_server_automatically: bool,
+    connect_ports_automatically: bool,
+}
+
+impl Device {
+    fn new_device(
+        name: String,
+        connect_ports_automatically: bool,
+        start_server_automatically: bool,
+        device_type: DeviceType,
+    ) -> Result<Self, String> {
+        // ClientOptions are bit flags that you can set with the constants provided
+        let client_options = super::get_client_options(start_server_automatically);
+
+        // Create a dummy client to find out the sample rate of the server to be able to provide it as a possible config.
+        // This client will be dropped, and a new one will be created when making the stream.
+        // This is a hack due to the fact that the Client must be moved to create the AsyncClient.
+        match super::get_client(&name, client_options) {
+            Ok(client) => Ok(Device {
+                // The name given to the client by JACK, could potentially be different from the name supplied e.g.if there is a name collision
+                name: client.name().to_string(),
+                sample_rate: SampleRate(client.sample_rate() as u32),
+                buffer_size: SupportedBufferSize::Range {
+                    min: client.buffer_size(),
+                    max: client.buffer_size(),
+                },
+                device_type,
+                start_server_automatically,
+                connect_ports_automatically,
+            }),
+            Err(e) => Err(e),
+        }
+    }
+
+    pub fn default_output_device(
+        name: &str,
+        connect_ports_automatically: bool,
+        start_server_automatically: bool,
+    ) -> Result<Self, String> {
+        let output_client_name = format!("{}_out", name);
+        Device::new_device(
+            output_client_name,
+            connect_ports_automatically,
+            start_server_automatically,
+            DeviceType::OutputDevice,
+        )
+    }
+
+    pub fn default_input_device(
+        name: &str,
+        connect_ports_automatically: bool,
+        start_server_automatically: bool,
+    ) -> Result<Self, String> {
+        let input_client_name = format!("{}_in", name);
+        Device::new_device(
+            input_client_name,
+            connect_ports_automatically,
+            start_server_automatically,
+            DeviceType::InputDevice,
+        )
+    }
+
+    pub fn default_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let channels = DEFAULT_NUM_CHANNELS;
+        let sample_rate = self.sample_rate;
+        let buffer_size = self.buffer_size.clone();
+        // The sample format for JACK audio ports is always "32-bit float mono audio" in the current implementation.
+        // Custom formats are allowed within JACK, but this is of niche interest.
+        // The format can be found programmatically by calling jack::PortSpec::port_type() on a created port.
+        let sample_format = JACK_SAMPLE_FORMAT;
+        Ok(SupportedStreamConfig {
+            channels,
+            sample_rate,
+            buffer_size,
+            sample_format,
+        })
+    }
+
+    pub fn supported_configs(&self) -> Vec<SupportedStreamConfigRange> {
+        let f = match self.default_config() {
+            Err(_) => return vec![],
+            Ok(f) => f,
+        };
+
+        let mut supported_configs = vec![];
+
+        for &channels in DEFAULT_SUPPORTED_CHANNELS.iter() {
+            supported_configs.push(SupportedStreamConfigRange {
+                channels,
+                min_sample_rate: f.sample_rate,
+                max_sample_rate: f.sample_rate,
+                buffer_size: f.buffer_size.clone(),
+                sample_format: f.sample_format,
+            });
+        }
+        supported_configs
+    }
+
+    pub fn is_input(&self) -> bool {
+        matches!(self.device_type, DeviceType::InputDevice)
+    }
+
+    pub fn is_output(&self) -> bool {
+        matches!(self.device_type, DeviceType::OutputDevice)
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Ok(self.name.clone())
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Ok(self.supported_configs().into_iter())
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Ok(self.supported_configs().into_iter())
+    }
+
+    /// Returns the default input config
+    /// The sample format for JACK audio ports is always "32-bit float mono audio" unless using a custom type.
+    /// The sample rate is set by the JACK server.
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        self.default_config()
+    }
+
+    /// Returns the default output config
+    /// The sample format for JACK audio ports is always "32-bit float mono audio" unless using a custom type.
+    /// The sample rate is set by the JACK server.
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        self.default_config()
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        conf: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        if let DeviceType::OutputDevice = &self.device_type {
+            // Trying to create an input stream from an output device
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+        if conf.sample_rate != self.sample_rate || sample_format != JACK_SAMPLE_FORMAT {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+        // The settings should be fine, create a Client
+        let client_options = super::get_client_options(self.start_server_automatically);
+        let client;
+        match super::get_client(&self.name, client_options) {
+            Ok(c) => client = c,
+            Err(e) => {
+                return Err(BuildStreamError::BackendSpecific {
+                    err: BackendSpecificError { description: e },
+                })
+            }
+        };
+        let mut stream = Stream::new_input(client, conf.channels, data_callback, error_callback);
+
+        if self.connect_ports_automatically {
+            stream.connect_to_system_inputs();
+        }
+
+        Ok(stream)
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        conf: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        if let DeviceType::InputDevice = &self.device_type {
+            // Trying to create an output stream from an input device
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+        if conf.sample_rate != self.sample_rate || sample_format != JACK_SAMPLE_FORMAT {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+
+        // The settings should be fine, create a Client
+        let client_options = super::get_client_options(self.start_server_automatically);
+        let client;
+        match super::get_client(&self.name, client_options) {
+            Ok(c) => client = c,
+            Err(e) => {
+                return Err(BuildStreamError::BackendSpecific {
+                    err: BackendSpecificError { description: e },
+                })
+            }
+        };
+        let mut stream = Stream::new_output(client, conf.channels, data_callback, error_callback);
+
+        if self.connect_ports_automatically {
+            stream.connect_to_system_outputs();
+        }
+
+        Ok(stream)
+    }
+}
+
+impl PartialEq for Device {
+    fn eq(&self, other: &Self) -> bool {
+        // Device::name() can never fail in this implementation
+        self.name().unwrap() == other.name().unwrap()
+    }
+}
+
+impl Eq for Device {}
+
+impl Hash for Device {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.name().unwrap().hash(state);
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/jack/mod.rs

@@ -0,0 +1,180 @@
+extern crate jack;
+
+use crate::traits::HostTrait;
+use crate::{DevicesError, SampleFormat, SupportedStreamConfigRange};
+
+mod device;
+pub use self::device::Device;
+pub use self::stream::Stream;
+mod stream;
+
+const JACK_SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+
+pub type SupportedInputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type Devices = std::vec::IntoIter<Device>;
+
+/// The JACK Host type
+#[derive(Debug)]
+pub struct Host {
+    /// The name that the client will have in JACK.
+    /// Until we have duplex streams two clients will be created adding "out" or "in" to the name
+    /// since names have to be unique.
+    name: String,
+    /// If ports are to be connected to the system (soundcard) ports automatically (default is true).
+    connect_ports_automatically: bool,
+    /// If the JACK server should be started automatically if it isn't already when creating a Client (default is false).
+    start_server_automatically: bool,
+    /// A list of the devices that have been created from this Host.
+    devices_created: Vec<Device>,
+}
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        let mut host = Host {
+            name: "cpal_client".to_owned(),
+            connect_ports_automatically: true,
+            start_server_automatically: false,
+            devices_created: vec![],
+        };
+        // Devices don't exist for JACK, they have to be created
+        host.initialize_default_devices();
+        Ok(host)
+    }
+    /// Set whether the ports should automatically be connected to system
+    /// (default is true)
+    pub fn set_connect_automatically(&mut self, do_connect: bool) {
+        self.connect_ports_automatically = do_connect;
+    }
+    /// Set whether a JACK server should be automatically started if it isn't already.
+    /// (default is false)
+    pub fn set_start_server_automatically(&mut self, do_start_server: bool) {
+        self.start_server_automatically = do_start_server;
+    }
+
+    pub fn input_device_with_name(&mut self, name: &str) -> Option<Device> {
+        self.name = name.to_owned();
+        self.default_input_device()
+    }
+
+    pub fn output_device_with_name(&mut self, name: &str) -> Option<Device> {
+        self.name = name.to_owned();
+        self.default_output_device()
+    }
+
+    fn initialize_default_devices(&mut self) {
+        let in_device_res = Device::default_input_device(
+            &self.name,
+            self.connect_ports_automatically,
+            self.start_server_automatically,
+        );
+
+        match in_device_res {
+            Ok(device) => self.devices_created.push(device),
+            Err(err) => {
+                println!("{}", err);
+            }
+        }
+
+        let out_device_res = Device::default_output_device(
+            &self.name,
+            self.connect_ports_automatically,
+            self.start_server_automatically,
+        );
+        match out_device_res {
+            Ok(device) => self.devices_created.push(device),
+            Err(err) => {
+                println!("{}", err);
+            }
+        }
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    /// JACK is available if
+    /// - the jack feature flag is set
+    /// - libjack is installed (wouldn't compile without it)
+    /// - the JACK server can be started
+    ///
+    /// If the code compiles the necessary jack libraries are installed.
+    /// There is no way to know if the user has set up a correct JACK configuration e.g. with qjackctl.
+    /// Users can choose to automatically start the server if it isn't already started when creating a client
+    /// so checking if the server is running could give a false negative in some use cases.
+    /// For these reasons this function should always return true.
+    fn is_available() -> bool {
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Ok(self.devices_created.clone().into_iter())
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        for device in &self.devices_created {
+            if device.is_input() {
+                return Some(device.clone());
+            }
+        }
+        None
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        for device in &self.devices_created {
+            if device.is_output() {
+                return Some(device.clone());
+            }
+        }
+        None
+    }
+}
+
+fn get_client_options(start_server_automatically: bool) -> jack::ClientOptions {
+    let mut client_options = jack::ClientOptions::empty();
+    client_options.set(
+        jack::ClientOptions::NO_START_SERVER,
+        !start_server_automatically,
+    );
+    client_options
+}
+
+fn get_client(name: &str, client_options: jack::ClientOptions) -> Result<jack::Client, String> {
+    let c_res = jack::Client::new(name, client_options);
+    match c_res {
+        Ok((client, status)) => {
+            // The ClientStatus can tell us many things
+            if status.intersects(jack::ClientStatus::SERVER_ERROR) {
+                return Err(String::from(
+                    "There was an error communicating with the JACK server!",
+                ));
+            } else if status.intersects(jack::ClientStatus::SERVER_FAILED) {
+                return Err(String::from("Could not connect to the JACK server!"));
+            } else if status.intersects(jack::ClientStatus::VERSION_ERROR) {
+                return Err(String::from(
+                    "Error connecting to JACK server: Client's protocol version does not match!",
+                ));
+            } else if status.intersects(jack::ClientStatus::INIT_FAILURE) {
+                return Err(String::from(
+                    "Error connecting to JACK server: Unable to initialize client!",
+                ));
+            } else if status.intersects(jack::ClientStatus::SHM_FAILURE) {
+                return Err(String::from(
+                    "Error connecting to JACK server: Unable to access shared memory!",
+                ));
+            } else if status.intersects(jack::ClientStatus::NO_SUCH_CLIENT) {
+                return Err(String::from(
+                    "Error connecting to JACK server: Requested client does not exist!",
+                ));
+            } else if status.intersects(jack::ClientStatus::INVALID_OPTION) {
+                return Err(String::from("Error connecting to JACK server: The operation contained an invalid or unsupported option!"));
+            }
+
+            return Ok(client);
+        }
+        Err(e) => {
+            return Err(format!("Failed to open client because of error: {:?}", e));
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/jack/stream.rs

@@ -0,0 +1,463 @@
+use crate::traits::StreamTrait;
+use crate::ChannelCount;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex};
+
+use crate::{
+    BackendSpecificError, Data, InputCallbackInfo, OutputCallbackInfo, PauseStreamError,
+    PlayStreamError, SampleRate, StreamError,
+};
+
+use super::JACK_SAMPLE_FORMAT;
+
+type ErrorCallbackPtr = Arc<Mutex<dyn FnMut(StreamError) + Send + 'static>>;
+
+pub struct Stream {
+    // TODO: It might be faster to send a message when playing/pausing than to check this every iteration
+    playing: Arc<AtomicBool>,
+    async_client: jack::AsyncClient<JackNotificationHandler, LocalProcessHandler>,
+    // Port names are stored in order to connect them to other ports in jack automatically
+    input_port_names: Vec<String>,
+    output_port_names: Vec<String>,
+}
+
+impl Stream {
+    // TODO: Return error messages
+    pub fn new_input<D, E>(
+        client: jack::Client,
+        channels: ChannelCount,
+        data_callback: D,
+        mut error_callback: E,
+    ) -> Stream
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let mut ports = vec![];
+        let mut port_names: Vec<String> = vec![];
+        // Create ports
+        for i in 0..channels {
+            let port_try = client.register_port(&format!("in_{}", i), jack::AudioIn::default());
+            match port_try {
+                Ok(port) => {
+                    // Get the port name in order to later connect it automatically
+                    if let Ok(port_name) = port.name() {
+                        port_names.push(port_name);
+                    }
+                    // Store the port into a Vec to move to the ProcessHandler
+                    ports.push(port);
+                }
+                Err(e) => {
+                    // If port creation failed, send the error back via the error_callback
+                    error_callback(
+                        BackendSpecificError {
+                            description: e.to_string(),
+                        }
+                        .into(),
+                    );
+                }
+            }
+        }
+
+        let playing = Arc::new(AtomicBool::new(true));
+
+        let error_callback_ptr = Arc::new(Mutex::new(error_callback)) as ErrorCallbackPtr;
+
+        let input_process_handler = LocalProcessHandler::new(
+            vec![],
+            ports,
+            SampleRate(client.sample_rate() as u32),
+            client.buffer_size() as usize,
+            Some(Box::new(data_callback)),
+            None,
+            playing.clone(),
+            Arc::clone(&error_callback_ptr),
+        );
+
+        let notification_handler = JackNotificationHandler::new(error_callback_ptr);
+
+        let async_client = client
+            .activate_async(notification_handler, input_process_handler)
+            .unwrap();
+
+        Stream {
+            playing,
+            async_client,
+            input_port_names: port_names,
+            output_port_names: vec![],
+        }
+    }
+
+    pub fn new_output<D, E>(
+        client: jack::Client,
+        channels: ChannelCount,
+        data_callback: D,
+        mut error_callback: E,
+    ) -> Stream
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let mut ports = vec![];
+        let mut port_names: Vec<String> = vec![];
+        // Create ports
+        for i in 0..channels {
+            let port_try = client.register_port(&format!("out_{}", i), jack::AudioOut::default());
+            match port_try {
+                Ok(port) => {
+                    // Get the port name in order to later connect it automatically
+                    if let Ok(port_name) = port.name() {
+                        port_names.push(port_name);
+                    }
+                    // Store the port into a Vec to move to the ProcessHandler
+                    ports.push(port);
+                }
+                Err(e) => {
+                    // If port creation failed, send the error back via the error_callback
+                    error_callback(
+                        BackendSpecificError {
+                            description: e.to_string(),
+                        }
+                        .into(),
+                    );
+                }
+            }
+        }
+
+        let playing = Arc::new(AtomicBool::new(true));
+
+        let error_callback_ptr = Arc::new(Mutex::new(error_callback)) as ErrorCallbackPtr;
+
+        let output_process_handler = LocalProcessHandler::new(
+            ports,
+            vec![],
+            SampleRate(client.sample_rate() as u32),
+            client.buffer_size() as usize,
+            None,
+            Some(Box::new(data_callback)),
+            playing.clone(),
+            Arc::clone(&error_callback_ptr),
+        );
+
+        let notification_handler = JackNotificationHandler::new(error_callback_ptr);
+
+        let async_client = client
+            .activate_async(notification_handler, output_process_handler)
+            .unwrap();
+
+        Stream {
+            playing,
+            async_client,
+            input_port_names: vec![],
+            output_port_names: port_names,
+        }
+    }
+
+    /// Connect to the standard system outputs in jack, system:playback_1 and system:playback_2
+    /// This has to be done after the client is activated, doing it just after creating the ports doesn't work.
+    pub fn connect_to_system_outputs(&mut self) {
+        // Get the system ports
+        let system_ports = self.async_client.as_client().ports(
+            Some("system:playback_.*"),
+            None,
+            jack::PortFlags::empty(),
+        );
+
+        // Connect outputs from this client to the system playback inputs
+        for i in 0..self.output_port_names.len() {
+            if i >= system_ports.len() {
+                break;
+            }
+            match self
+                .async_client
+                .as_client()
+                .connect_ports_by_name(&self.output_port_names[i], &system_ports[i])
+            {
+                Ok(_) => (),
+                Err(e) => println!("Unable to connect to port with error {}", e),
+            }
+        }
+    }
+
+    /// Connect to the standard system outputs in jack, system:capture_1 and system:capture_2
+    /// This has to be done after the client is activated, doing it just after creating the ports doesn't work.
+    pub fn connect_to_system_inputs(&mut self) {
+        // Get the system ports
+        let system_ports = self.async_client.as_client().ports(
+            Some("system:capture_.*"),
+            None,
+            jack::PortFlags::empty(),
+        );
+
+        // Connect outputs from this client to the system playback inputs
+        for i in 0..self.input_port_names.len() {
+            if i >= system_ports.len() {
+                break;
+            }
+            match self
+                .async_client
+                .as_client()
+                .connect_ports_by_name(&system_ports[i], &self.input_port_names[i])
+            {
+                Ok(_) => (),
+                Err(e) => println!("Unable to connect to port with error {}", e),
+            }
+        }
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        self.playing.store(true, Ordering::SeqCst);
+        Ok(())
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        self.playing.store(false, Ordering::SeqCst);
+        Ok(())
+    }
+}
+
+struct LocalProcessHandler {
+    /// No new ports are allowed to be created after the creation of the LocalProcessHandler as that would invalidate the buffer sizes
+    out_ports: Vec<jack::Port<jack::AudioOut>>,
+    in_ports: Vec<jack::Port<jack::AudioIn>>,
+
+    sample_rate: SampleRate,
+    buffer_size: usize,
+    input_data_callback: Option<Box<dyn FnMut(&Data, &InputCallbackInfo) + Send + 'static>>,
+    output_data_callback: Option<Box<dyn FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static>>,
+
+    // JACK audio samples are 32-bit float (unless you do some custom dark magic)
+    temp_input_buffer: Vec<f32>,
+    temp_output_buffer: Vec<f32>,
+    playing: Arc<AtomicBool>,
+    creation_timestamp: std::time::Instant,
+    /// This should not be called on `process`, only on `buffer_size` because it can block.
+    error_callback_ptr: ErrorCallbackPtr,
+}
+
+impl LocalProcessHandler {
+    fn new(
+        out_ports: Vec<jack::Port<jack::AudioOut>>,
+        in_ports: Vec<jack::Port<jack::AudioIn>>,
+        sample_rate: SampleRate,
+        buffer_size: usize,
+        input_data_callback: Option<Box<dyn FnMut(&Data, &InputCallbackInfo) + Send + 'static>>,
+        output_data_callback: Option<
+            Box<dyn FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static>,
+        >,
+        playing: Arc<AtomicBool>,
+        error_callback_ptr: ErrorCallbackPtr,
+    ) -> Self {
+        // These may be reallocated in the `buffer_size` callback.
+        let temp_input_buffer = vec![0.0; in_ports.len() * buffer_size];
+        let temp_output_buffer = vec![0.0; out_ports.len() * buffer_size];
+
+        LocalProcessHandler {
+            out_ports,
+            in_ports,
+            sample_rate,
+            buffer_size,
+            input_data_callback,
+            output_data_callback,
+            temp_input_buffer,
+            temp_output_buffer,
+            playing,
+            creation_timestamp: std::time::Instant::now(),
+            error_callback_ptr,
+        }
+    }
+}
+
+fn temp_buffer_to_data(temp_input_buffer: &mut Vec<f32>, total_buffer_size: usize) -> Data {
+    let slice = &temp_input_buffer[0..total_buffer_size];
+    let data = slice.as_ptr() as *mut ();
+    let len = total_buffer_size;
+    let data = unsafe { Data::from_parts(data, len, JACK_SAMPLE_FORMAT) };
+    data
+}
+
+impl jack::ProcessHandler for LocalProcessHandler {
+    fn process(&mut self, _: &jack::Client, process_scope: &jack::ProcessScope) -> jack::Control {
+        if !self.playing.load(Ordering::SeqCst) {
+            return jack::Control::Continue;
+        }
+
+        // This should be equal to self.buffer_size, but the implementation will
+        // work even if it is less. Will panic in `temp_buffer_to_data` if greater.
+        let current_frame_count = process_scope.n_frames() as usize;
+
+        // Get timestamp data
+        let cycle_times = process_scope.cycle_times();
+        let current_start_usecs = match cycle_times {
+            Ok(times) => times.current_usecs,
+            Err(_) => {
+                // jack was unable to get the current time information
+                // Fall back to using Instants
+                let now = std::time::Instant::now();
+                let duration = now.duration_since(self.creation_timestamp);
+                duration.as_micros() as u64
+            }
+        };
+        let start_cycle_instant = micros_to_stream_instant(current_start_usecs);
+        let start_callback_instant = start_cycle_instant
+            .add(frames_to_duration(
+                process_scope.frames_since_cycle_start() as usize,
+                self.sample_rate,
+            ))
+            .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+
+        if let Some(input_callback) = &mut self.input_data_callback {
+            // Let's get the data from the input ports and run the callback
+
+            let num_in_channels = self.in_ports.len();
+
+            // Read the data from the input ports into the temporary buffer
+            // Go through every channel and store its data in the temporary input buffer
+            for ch_ix in 0..num_in_channels {
+                let input_channel = &self.in_ports[ch_ix].as_slice(process_scope);
+                for i in 0..current_frame_count {
+                    self.temp_input_buffer[ch_ix + i * num_in_channels] = input_channel[i];
+                }
+            }
+            // Create a slice of exactly current_frame_count frames
+            let data = temp_buffer_to_data(
+                &mut self.temp_input_buffer,
+                current_frame_count * num_in_channels,
+            );
+            // Create timestamp
+            let frames_since_cycle_start = process_scope.frames_since_cycle_start() as usize;
+            let duration_since_cycle_start =
+                frames_to_duration(frames_since_cycle_start, self.sample_rate);
+            let callback = start_callback_instant
+                .add(duration_since_cycle_start)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let capture = start_callback_instant;
+            let timestamp = crate::InputStreamTimestamp { callback, capture };
+            let info = crate::InputCallbackInfo { timestamp };
+            input_callback(&data, &info);
+        }
+
+        if let Some(output_callback) = &mut self.output_data_callback {
+            let num_out_channels = self.out_ports.len();
+
+            // Create a slice of exactly current_frame_count frames
+            let mut data = temp_buffer_to_data(
+                &mut self.temp_output_buffer,
+                current_frame_count * num_out_channels,
+            );
+            // Create timestamp
+            let frames_since_cycle_start = process_scope.frames_since_cycle_start() as usize;
+            let duration_since_cycle_start =
+                frames_to_duration(frames_since_cycle_start, self.sample_rate);
+            let callback = start_callback_instant
+                .add(duration_since_cycle_start)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let buffer_duration = frames_to_duration(current_frame_count, self.sample_rate);
+            let playback = start_cycle_instant
+                .add(buffer_duration)
+                .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+            let timestamp = crate::OutputStreamTimestamp { callback, playback };
+            let info = crate::OutputCallbackInfo { timestamp };
+            output_callback(&mut data, &info);
+
+            // Deinterlace
+            for ch_ix in 0..num_out_channels {
+                let output_channel = &mut self.out_ports[ch_ix].as_mut_slice(process_scope);
+                for i in 0..current_frame_count {
+                    output_channel[i] = self.temp_output_buffer[ch_ix + i * num_out_channels];
+                }
+            }
+        }
+
+        // Continue as normal
+        jack::Control::Continue
+    }
+
+    fn buffer_size(&mut self, _: &jack::Client, size: jack::Frames) -> jack::Control {
+        // The `buffer_size` callback is actually called on the process thread, but
+        // it does not need to be suitable for real-time use. Thus we can simply allocate
+        // new buffers here. It is also fine to call the error callback.
+        // Details: https://github.com/RustAudio/rust-jack/issues/137
+        let new_size = size as usize;
+        if new_size != self.buffer_size {
+            self.buffer_size = new_size;
+            self.temp_input_buffer = vec![0.0; self.in_ports.len() * new_size];
+            self.temp_output_buffer = vec![0.0; self.out_ports.len() * new_size];
+            let description = format!("buffer size changed to: {}", new_size);
+            if let Ok(mut mutex_guard) = self.error_callback_ptr.lock() {
+                let err = &mut *mutex_guard;
+                err(BackendSpecificError { description }.into());
+            }
+        }
+
+        jack::Control::Continue
+    }
+}
+
+fn micros_to_stream_instant(micros: u64) -> crate::StreamInstant {
+    let nanos = micros * 1000;
+    let secs = micros / 1_000_000;
+    let subsec_nanos = nanos - secs * 1_000_000_000;
+    crate::StreamInstant::new(secs as i64, subsec_nanos as u32)
+}
+
+// Convert the given duration in frames at the given sample rate to a `std::time::Duration`.
+fn frames_to_duration(frames: usize, rate: crate::SampleRate) -> std::time::Duration {
+    let secsf = frames as f64 / rate.0 as f64;
+    let secs = secsf as u64;
+    let nanos = ((secsf - secs as f64) * 1_000_000_000.0) as u32;
+    std::time::Duration::new(secs, nanos)
+}
+
+/// Receives notifications from the JACK server. It is unclear if this may be run concurrent with itself under JACK2 specs
+/// so it needs to be Sync.
+struct JackNotificationHandler {
+    error_callback_ptr: ErrorCallbackPtr,
+    init_sample_rate_flag: Arc<AtomicBool>,
+}
+
+impl JackNotificationHandler {
+    pub fn new(error_callback_ptr: ErrorCallbackPtr) -> Self {
+        JackNotificationHandler {
+            error_callback_ptr,
+            init_sample_rate_flag: Arc::new(AtomicBool::new(false)),
+        }
+    }
+
+    fn send_error(&mut self, description: String) {
+        // This thread isn't the audio thread, it's fine to block
+        if let Ok(mut mutex_guard) = self.error_callback_ptr.lock() {
+            let err = &mut *mutex_guard;
+            err(BackendSpecificError { description }.into());
+        }
+    }
+}
+
+impl jack::NotificationHandler for JackNotificationHandler {
+    fn shutdown(&mut self, _status: jack::ClientStatus, reason: &str) {
+        self.send_error(format!("JACK was shut down for reason: {}", reason));
+    }
+
+    fn sample_rate(&mut self, _: &jack::Client, srate: jack::Frames) -> jack::Control {
+        match self.init_sample_rate_flag.load(Ordering::SeqCst) {
+            false => {
+                // One of these notifications is sent every time a client is started.
+                self.init_sample_rate_flag.store(true, Ordering::SeqCst);
+                jack::Control::Continue
+            }
+            true => {
+                self.send_error(format!("sample rate changed to: {}", srate));
+                // Since CPAL currently has no way of signaling a sample rate change in order to make
+                // all necessary changes that would bring we choose to quit.
+                jack::Control::Quit
+            }
+        }
+    }
+
+    fn xrun(&mut self, _: &jack::Client) -> jack::Control {
+        self.send_error(String::from("xrun (buffer over or under run)"));
+        jack::Control::Continue
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/mod.rs

@@ -0,0 +1,30 @@
+#[cfg(any(
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd"
+))]
+pub(crate) mod alsa;
+#[cfg(all(windows, feature = "asio"))]
+pub(crate) mod asio;
+#[cfg(any(target_os = "macos", target_os = "ios"))]
+pub(crate) mod coreaudio;
+#[cfg(target_os = "emscripten")]
+pub(crate) mod emscripten;
+#[cfg(all(
+    any(
+        target_os = "linux",
+        target_os = "dragonfly",
+        target_os = "freebsd",
+        target_os = "netbsd"
+    ),
+    feature = "jack"
+))]
+pub(crate) mod jack;
+pub(crate) mod null;
+#[cfg(target_os = "android")]
+pub(crate) mod oboe;
+#[cfg(windows)]
+pub(crate) mod wasapi;
+#[cfg(all(target_arch = "wasm32", feature = "wasm-bindgen"))]
+pub(crate) mod webaudio;

src-tauri/patches/cpal-0.15.3/src/host/null/mod.rs

@@ -0,0 +1,160 @@
+use std::time::Duration;
+
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BuildStreamError, Data, DefaultStreamConfigError, DeviceNameError, DevicesError,
+    InputCallbackInfo, OutputCallbackInfo, PauseStreamError, PlayStreamError, SampleFormat,
+    StreamConfig, StreamError, SupportedStreamConfig, SupportedStreamConfigRange,
+    SupportedStreamConfigsError,
+};
+
+#[derive(Default)]
+pub struct Devices;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Device;
+
+pub struct Host;
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Stream;
+
+pub struct SupportedInputConfigs;
+pub struct SupportedOutputConfigs;
+
+impl Host {
+    #[allow(dead_code)]
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl Devices {
+    pub fn new() -> Result<Self, DevicesError> {
+        Ok(Devices)
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Ok("null".to_owned())
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedInputConfigs, SupportedStreamConfigsError> {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        unimplemented!()
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        _config: &StreamConfig,
+        _sample_format: SampleFormat,
+        _data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        unimplemented!()
+    }
+
+    /// Create an output stream.
+    fn build_output_stream_raw<D, E>(
+        &self,
+        _config: &StreamConfig,
+        _sample_format: SampleFormat,
+        _data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        unimplemented!()
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        false
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Device> {
+        None
+    }
+
+    fn default_output_device(&self) -> Option<Device> {
+        None
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        unimplemented!()
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        unimplemented!()
+    }
+}
+
+impl Iterator for Devices {
+    type Item = Device;
+
+    #[inline]
+    fn next(&mut self) -> Option<Device> {
+        None
+    }
+}
+
+impl Iterator for SupportedInputConfigs {
+    type Item = SupportedStreamConfigRange;
+
+    #[inline]
+    fn next(&mut self) -> Option<SupportedStreamConfigRange> {
+        None
+    }
+}
+
+impl Iterator for SupportedOutputConfigs {
+    type Item = SupportedStreamConfigRange;
+
+    #[inline]
+    fn next(&mut self) -> Option<SupportedStreamConfigRange> {
+        None
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/oboe/android_media.rs

@@ -0,0 +1,62 @@
+use std::sync::Arc;
+
+extern crate jni;
+
+use self::jni::Executor;
+use self::jni::{errors::Result as JResult, JNIEnv, JavaVM};
+
+// constants from android.media.AudioFormat
+pub const ENCODING_PCM_16BIT: i32 = 2;
+pub const ENCODING_PCM_FLOAT: i32 = 4;
+pub const CHANNEL_OUT_MONO: i32 = 4;
+pub const CHANNEL_OUT_STEREO: i32 = 12;
+
+fn with_attached<F, R>(closure: F) -> JResult<R>
+where
+    F: FnOnce(&mut JNIEnv) -> JResult<R>,
+{
+    let android_context = ndk_context::android_context();
+    let vm = Arc::new(unsafe { JavaVM::from_raw(android_context.vm().cast())? });
+    Executor::new(vm).with_attached(|env| closure(env))
+}
+
+fn get_min_buffer_size(
+    class: &'static str,
+    sample_rate: i32,
+    channel_mask: i32,
+    format: i32,
+) -> i32 {
+    // Unwrapping everything because these operations are not expected to fail
+    // or throw exceptions. Android returns negative values for invalid parameters,
+    // which is what we expect.
+    with_attached(|env| {
+        let class = env.find_class(class).unwrap();
+        env.call_static_method(
+            class,
+            "getMinBufferSize",
+            "(III)I",
+            &[sample_rate.into(), channel_mask.into(), format.into()],
+        )
+        .unwrap()
+        .i()
+    })
+    .unwrap()
+}
+
+pub fn get_audio_track_min_buffer_size(sample_rate: i32, channel_mask: i32, format: i32) -> i32 {
+    get_min_buffer_size(
+        "android/media/AudioTrack",
+        sample_rate,
+        channel_mask,
+        format,
+    )
+}
+
+pub fn get_audio_record_min_buffer_size(sample_rate: i32, channel_mask: i32, format: i32) -> i32 {
+    get_min_buffer_size(
+        "android/media/AudioRecord",
+        sample_rate,
+        channel_mask,
+        format,
+    )
+}

src-tauri/patches/cpal-0.15.3/src/host/oboe/convert.rs

@@ -0,0 +1,82 @@
+use std::convert::TryInto;
+use std::time::Duration;
+
+extern crate oboe;
+
+use crate::{
+    BackendSpecificError, BuildStreamError, PauseStreamError, PlayStreamError, StreamError,
+    StreamInstant,
+};
+
+pub fn to_stream_instant(duration: Duration) -> StreamInstant {
+    StreamInstant::new(
+        duration.as_secs().try_into().unwrap(),
+        duration.subsec_nanos(),
+    )
+}
+
+pub fn stream_instant<T: oboe::AudioStreamSafe + ?Sized>(stream: &mut T) -> StreamInstant {
+    const CLOCK_MONOTONIC: i32 = 1;
+    let ts = stream
+        .get_timestamp(CLOCK_MONOTONIC)
+        .unwrap_or(oboe::FrameTimestamp {
+            position: 0,
+            timestamp: 0,
+        });
+    to_stream_instant(Duration::from_nanos(ts.timestamp as u64))
+}
+
+impl From<oboe::Error> for StreamError {
+    fn from(error: oboe::Error) -> Self {
+        use self::oboe::Error::*;
+        match error {
+            Disconnected | Unavailable | Closed => Self::DeviceNotAvailable,
+            e => (BackendSpecificError {
+                description: e.to_string(),
+            })
+            .into(),
+        }
+    }
+}
+
+impl From<oboe::Error> for PlayStreamError {
+    fn from(error: oboe::Error) -> Self {
+        use self::oboe::Error::*;
+        match error {
+            Disconnected | Unavailable | Closed => Self::DeviceNotAvailable,
+            e => (BackendSpecificError {
+                description: e.to_string(),
+            })
+            .into(),
+        }
+    }
+}
+
+impl From<oboe::Error> for PauseStreamError {
+    fn from(error: oboe::Error) -> Self {
+        use self::oboe::Error::*;
+        match error {
+            Disconnected | Unavailable | Closed => Self::DeviceNotAvailable,
+            e => (BackendSpecificError {
+                description: e.to_string(),
+            })
+            .into(),
+        }
+    }
+}
+
+impl From<oboe::Error> for BuildStreamError {
+    fn from(error: oboe::Error) -> Self {
+        use self::oboe::Error::*;
+        match error {
+            Disconnected | Unavailable | Closed => Self::DeviceNotAvailable,
+            NoFreeHandles => Self::StreamIdOverflow,
+            InvalidFormat | InvalidRate => Self::StreamConfigNotSupported,
+            IllegalArgument => Self::InvalidArgument,
+            e => (BackendSpecificError {
+                description: e.to_string(),
+            })
+            .into(),
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/oboe/input_callback.rs

@@ -0,0 +1,90 @@
+use std::marker::PhantomData;
+use std::time::Instant;
+
+extern crate oboe;
+
+use super::convert::{stream_instant, to_stream_instant};
+use crate::{Data, InputCallbackInfo, InputStreamTimestamp, SizedSample, StreamError};
+
+pub struct CpalInputCallback<I, C> {
+    data_cb: Box<dyn FnMut(&Data, &InputCallbackInfo) + Send + 'static>,
+    error_cb: Box<dyn FnMut(StreamError) + Send + 'static>,
+    created: Instant,
+    phantom_channel: PhantomData<C>,
+    phantom_input: PhantomData<I>,
+}
+
+impl<I, C> CpalInputCallback<I, C> {
+    pub fn new<D, E>(data_cb: D, error_cb: E) -> Self
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Self {
+            data_cb: Box::new(data_cb),
+            error_cb: Box::new(error_cb),
+            created: Instant::now(),
+            phantom_channel: PhantomData,
+            phantom_input: PhantomData,
+        }
+    }
+
+    fn make_callback_info(
+        &self,
+        audio_stream: &mut dyn oboe::AudioInputStreamSafe,
+    ) -> InputCallbackInfo {
+        InputCallbackInfo {
+            timestamp: InputStreamTimestamp {
+                callback: to_stream_instant(self.created.elapsed()),
+                capture: stream_instant(audio_stream),
+            },
+        }
+    }
+}
+
+impl<T: SizedSample, C: oboe::IsChannelCount> oboe::AudioInputCallback for CpalInputCallback<T, C>
+where
+    (T, C): oboe::IsFrameType,
+{
+    type FrameType = (T, C);
+
+    fn on_error_before_close(
+        &mut self,
+        _audio_stream: &mut dyn oboe::AudioInputStreamSafe,
+        error: oboe::Error,
+    ) {
+        (self.error_cb)(StreamError::from(error))
+    }
+
+    fn on_error_after_close(
+        &mut self,
+        _audio_stream: &mut dyn oboe::AudioInputStreamSafe,
+        error: oboe::Error,
+    ) {
+        (self.error_cb)(StreamError::from(error))
+    }
+
+    fn on_audio_ready(
+        &mut self,
+        audio_stream: &mut dyn oboe::AudioInputStreamSafe,
+        audio_data: &[<<Self as oboe::AudioInputCallback>::FrameType as oboe::IsFrameType>::Type],
+    ) -> oboe::DataCallbackResult {
+        let cb_info = self.make_callback_info(audio_stream);
+        let channel_count = if C::CHANNEL_COUNT == oboe::ChannelCount::Mono {
+            1
+        } else {
+            2
+        };
+        (self.data_cb)(
+            &unsafe {
+                Data::from_parts(
+                    audio_data.as_ptr() as *mut _,
+                    audio_data.len() * channel_count,
+                    T::FORMAT,
+                )
+            },
+            &cb_info,
+        );
+        oboe::DataCallbackResult::Continue
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/oboe/mod.rs

@@ -0,0 +1,499 @@
+use std::cell::RefCell;
+use std::cmp;
+use std::convert::TryInto;
+use std::time::Duration;
+use std::vec::IntoIter as VecIntoIter;
+
+extern crate oboe;
+
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BackendSpecificError, BufferSize, BuildStreamError, Data, DefaultStreamConfigError,
+    DeviceNameError, DevicesError, InputCallbackInfo, OutputCallbackInfo, PauseStreamError,
+    PlayStreamError, SampleFormat, SampleRate, SizedSample, StreamConfig, StreamError,
+    SupportedBufferSize, SupportedStreamConfig, SupportedStreamConfigRange,
+    SupportedStreamConfigsError,
+};
+
+mod android_media;
+mod convert;
+mod input_callback;
+mod output_callback;
+
+use self::android_media::{get_audio_record_min_buffer_size, get_audio_track_min_buffer_size};
+use self::input_callback::CpalInputCallback;
+use self::oboe::{AudioInputStream, AudioOutputStream};
+use self::output_callback::CpalOutputCallback;
+
+// Android Java API supports up to 8 channels, but oboe API
+// only exposes mono and stereo.
+const CHANNEL_MASKS: [i32; 2] = [
+    android_media::CHANNEL_OUT_MONO,
+    android_media::CHANNEL_OUT_STEREO,
+];
+
+const SAMPLE_RATES: [i32; 13] = [
+    5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000, 176_400, 192_000,
+];
+
+pub struct Host;
+#[derive(Clone)]
+pub struct Device(Option<oboe::AudioDeviceInfo>);
+pub enum Stream {
+    Input(Box<RefCell<dyn AudioInputStream>>),
+    Output(Box<RefCell<dyn AudioOutputStream>>),
+}
+pub type SupportedInputConfigs = VecIntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = VecIntoIter<SupportedStreamConfigRange>;
+pub type Devices = VecIntoIter<Device>;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        if let Ok(devices) = oboe::AudioDeviceInfo::request(oboe::AudioDeviceDirection::InputOutput)
+        {
+            Ok(devices
+                .into_iter()
+                .map(|d| Device(Some(d)))
+                .collect::<Vec<_>>()
+                .into_iter())
+        } else {
+            Ok(vec![Device(None)].into_iter())
+        }
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        Some(Device(None))
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        Some(Device(None))
+    }
+}
+
+fn buffer_size_range_for_params(
+    is_output: bool,
+    sample_rate: i32,
+    channel_mask: i32,
+    android_format: i32,
+) -> SupportedBufferSize {
+    let min_buffer_size = if is_output {
+        get_audio_track_min_buffer_size(sample_rate, channel_mask, android_format)
+    } else {
+        get_audio_record_min_buffer_size(sample_rate, channel_mask, android_format)
+    };
+    if min_buffer_size > 0 {
+        SupportedBufferSize::Range {
+            min: min_buffer_size as u32,
+            max: i32::MAX as u32,
+        }
+    } else {
+        SupportedBufferSize::Unknown
+    }
+}
+
+fn default_supported_configs(is_output: bool) -> VecIntoIter<SupportedStreamConfigRange> {
+    // Have to "brute force" the parameter combinations with getMinBufferSize
+    const FORMATS: [SampleFormat; 2] = [SampleFormat::I16, SampleFormat::F32];
+
+    let mut output = Vec::with_capacity(SAMPLE_RATES.len() * CHANNEL_MASKS.len() * FORMATS.len());
+    for sample_format in &FORMATS {
+        let android_format = if *sample_format == SampleFormat::I16 {
+            android_media::ENCODING_PCM_16BIT
+        } else {
+            android_media::ENCODING_PCM_FLOAT
+        };
+        for (mask_idx, channel_mask) in CHANNEL_MASKS.iter().enumerate() {
+            let channel_count = mask_idx + 1;
+            for sample_rate in &SAMPLE_RATES {
+                if let SupportedBufferSize::Range { min, max } = buffer_size_range_for_params(
+                    is_output,
+                    *sample_rate,
+                    *channel_mask,
+                    android_format,
+                ) {
+                    output.push(SupportedStreamConfigRange {
+                        channels: channel_count as u16,
+                        min_sample_rate: SampleRate(*sample_rate as u32),
+                        max_sample_rate: SampleRate(*sample_rate as u32),
+                        buffer_size: SupportedBufferSize::Range { min, max },
+                        sample_format: *sample_format,
+                    });
+                }
+            }
+        }
+    }
+
+    output.into_iter()
+}
+
+fn device_supported_configs(
+    device: &oboe::AudioDeviceInfo,
+    is_output: bool,
+) -> VecIntoIter<SupportedStreamConfigRange> {
+    let sample_rates = if !device.sample_rates.is_empty() {
+        device.sample_rates.as_slice()
+    } else {
+        &SAMPLE_RATES
+    };
+
+    const ALL_CHANNELS: [i32; 2] = [1, 2];
+    let channel_counts = if !device.channel_counts.is_empty() {
+        device.channel_counts.as_slice()
+    } else {
+        &ALL_CHANNELS
+    };
+
+    const ALL_FORMATS: [oboe::AudioFormat; 2] = [oboe::AudioFormat::I16, oboe::AudioFormat::F32];
+    let formats = if !device.formats.is_empty() {
+        device.formats.as_slice()
+    } else {
+        &ALL_FORMATS
+    };
+
+    let mut output = Vec::with_capacity(sample_rates.len() * channel_counts.len() * formats.len());
+    for sample_rate in sample_rates {
+        for channel_count in channel_counts {
+            assert!(*channel_count > 0);
+            if *channel_count > 2 {
+                // could be supported by the device, but oboe does not support more than 2 channels
+                continue;
+            }
+            let channel_mask = CHANNEL_MASKS[*channel_count as usize - 1];
+            for format in formats {
+                let (android_format, sample_format) = match format {
+                    oboe::AudioFormat::I16 => {
+                        (android_media::ENCODING_PCM_16BIT, SampleFormat::I16)
+                    }
+                    oboe::AudioFormat::F32 => {
+                        (android_media::ENCODING_PCM_FLOAT, SampleFormat::F32)
+                    }
+                    _ => panic!("Unexpected format"),
+                };
+                let buffer_size = buffer_size_range_for_params(
+                    is_output,
+                    *sample_rate,
+                    channel_mask,
+                    android_format,
+                );
+                output.push(SupportedStreamConfigRange {
+                    channels: cmp::min(*channel_count as u16, 2u16),
+                    min_sample_rate: SampleRate(*sample_rate as u32),
+                    max_sample_rate: SampleRate(*sample_rate as u32),
+                    buffer_size,
+                    sample_format,
+                });
+            }
+        }
+    }
+
+    output.into_iter()
+}
+
+fn configure_for_device<D, C, I>(
+    builder: oboe::AudioStreamBuilder<D, C, I>,
+    device: &Device,
+    config: &StreamConfig,
+) -> oboe::AudioStreamBuilder<D, C, I> {
+    let mut builder = if let Some(info) = &device.0 {
+        builder.set_device_id(info.id)
+    } else {
+        builder
+    };
+    builder = builder.set_sample_rate(config.sample_rate.0.try_into().unwrap());
+    match &config.buffer_size {
+        BufferSize::Default => builder,
+        BufferSize::Fixed(size) => builder.set_buffer_capacity_in_frames(*size as i32),
+    }
+}
+
+fn build_input_stream<D, E, C, T>(
+    device: &Device,
+    config: &StreamConfig,
+    data_callback: D,
+    error_callback: E,
+    builder: oboe::AudioStreamBuilder<oboe::Input, C, T>,
+) -> Result<Stream, BuildStreamError>
+where
+    T: SizedSample + oboe::IsFormat + Send + 'static,
+    C: oboe::IsChannelCount + Send + 'static,
+    (T, C): oboe::IsFrameType,
+    D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+    E: FnMut(StreamError) + Send + 'static,
+{
+    let builder = configure_for_device(builder, device, config);
+    let stream = builder
+        .set_callback(CpalInputCallback::<T, C>::new(
+            data_callback,
+            error_callback,
+        ))
+        .open_stream()?;
+    Ok(Stream::Input(Box::new(RefCell::new(stream))))
+}
+
+fn build_output_stream<D, E, C, T>(
+    device: &Device,
+    config: &StreamConfig,
+    data_callback: D,
+    error_callback: E,
+    builder: oboe::AudioStreamBuilder<oboe::Output, C, T>,
+) -> Result<Stream, BuildStreamError>
+where
+    T: SizedSample + oboe::IsFormat + Send + 'static,
+    C: oboe::IsChannelCount + Send + 'static,
+    (T, C): oboe::IsFrameType,
+    D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+    E: FnMut(StreamError) + Send + 'static,
+{
+    let builder = configure_for_device(builder, device, config);
+    let stream = builder
+        .set_callback(CpalOutputCallback::<T, C>::new(
+            data_callback,
+            error_callback,
+        ))
+        .open_stream()?;
+    Ok(Stream::Output(Box::new(RefCell::new(stream))))
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    fn name(&self) -> Result<String, DeviceNameError> {
+        match &self.0 {
+            None => Ok("default".to_owned()),
+            Some(info) => Ok(info.product_name.clone()),
+        }
+    }
+
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        if let Some(info) = &self.0 {
+            Ok(device_supported_configs(info, false))
+        } else {
+            Ok(default_supported_configs(false))
+        }
+    }
+
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        if let Some(info) = &self.0 {
+            Ok(device_supported_configs(info, true))
+        } else {
+            Ok(default_supported_configs(true))
+        }
+    }
+
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let mut configs: Vec<_> = self.supported_input_configs().unwrap().collect();
+        configs.sort_by(|a, b| b.cmp_default_heuristics(a));
+        let config = configs
+            .into_iter()
+            .next()
+            .ok_or(DefaultStreamConfigError::StreamTypeNotSupported)?
+            .with_max_sample_rate();
+        Ok(config)
+    }
+
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        let mut configs: Vec<_> = self.supported_output_configs().unwrap().collect();
+        configs.sort_by(|a, b| b.cmp_default_heuristics(a));
+        let config = configs
+            .into_iter()
+            .next()
+            .ok_or(DefaultStreamConfigError::StreamTypeNotSupported)?
+            .with_max_sample_rate();
+        Ok(config)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        match sample_format {
+            SampleFormat::I16 => {
+                let builder = oboe::AudioStreamBuilder::default()
+                    .set_input()
+                    .set_format::<i16>();
+                if config.channels == 1 {
+                    build_input_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_mono(),
+                    )
+                } else if config.channels == 2 {
+                    build_input_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_stereo(),
+                    )
+                } else {
+                    Err(BackendSpecificError {
+                        description: "More than 2 channels are not supported by Oboe.".to_owned(),
+                    }
+                    .into())
+                }
+            }
+            SampleFormat::F32 => {
+                let builder = oboe::AudioStreamBuilder::default()
+                    .set_input()
+                    .set_format::<f32>();
+                if config.channels == 1 {
+                    build_input_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_mono(),
+                    )
+                } else if config.channels == 2 {
+                    build_input_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_stereo(),
+                    )
+                } else {
+                    Err(BackendSpecificError {
+                        description: "More than 2 channels are not supported by Oboe.".to_owned(),
+                    }
+                    .into())
+                }
+            }
+            sample_format => Err(BackendSpecificError {
+                description: format!("{} format is not supported on Android.", sample_format),
+            }
+            .into()),
+        }
+    }
+
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        match sample_format {
+            SampleFormat::I16 => {
+                let builder = oboe::AudioStreamBuilder::default()
+                    .set_output()
+                    .set_format::<i16>();
+                if config.channels == 1 {
+                    build_output_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_mono(),
+                    )
+                } else if config.channels == 2 {
+                    build_output_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_stereo(),
+                    )
+                } else {
+                    Err(BackendSpecificError {
+                        description: "More than 2 channels are not supported by Oboe.".to_owned(),
+                    }
+                    .into())
+                }
+            }
+            SampleFormat::F32 => {
+                let builder = oboe::AudioStreamBuilder::default()
+                    .set_output()
+                    .set_format::<f32>();
+                if config.channels == 1 {
+                    build_output_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_mono(),
+                    )
+                } else if config.channels == 2 {
+                    build_output_stream(
+                        self,
+                        config,
+                        data_callback,
+                        error_callback,
+                        builder.set_stereo(),
+                    )
+                } else {
+                    Err(BackendSpecificError {
+                        description: "More than 2 channels are not supported by Oboe.".to_owned(),
+                    }
+                    .into())
+                }
+            }
+            sample_format => Err(BackendSpecificError {
+                description: format!("{} format is not supported on Android.", sample_format),
+            }
+            .into()),
+        }
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        match self {
+            Self::Input(stream) => stream
+                .borrow_mut()
+                .request_start()
+                .map_err(PlayStreamError::from),
+            Self::Output(stream) => stream
+                .borrow_mut()
+                .request_start()
+                .map_err(PlayStreamError::from),
+        }
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        match self {
+            Self::Input(_) => Err(BackendSpecificError {
+                description: "Pause called on the input stream.".to_owned(),
+            }
+            .into()),
+            Self::Output(stream) => stream
+                .borrow_mut()
+                .request_pause()
+                .map_err(PauseStreamError::from),
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/oboe/output_callback.rs

@@ -0,0 +1,90 @@
+use std::marker::PhantomData;
+use std::time::Instant;
+
+extern crate oboe;
+
+use super::convert::{stream_instant, to_stream_instant};
+use crate::{Data, OutputCallbackInfo, OutputStreamTimestamp, SizedSample, StreamError};
+
+pub struct CpalOutputCallback<I, C> {
+    data_cb: Box<dyn FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static>,
+    error_cb: Box<dyn FnMut(StreamError) + Send + 'static>,
+    created: Instant,
+    phantom_channel: PhantomData<C>,
+    phantom_input: PhantomData<I>,
+}
+
+impl<I, C> CpalOutputCallback<I, C> {
+    pub fn new<D, E>(data_cb: D, error_cb: E) -> Self
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        Self {
+            data_cb: Box::new(data_cb),
+            error_cb: Box::new(error_cb),
+            created: Instant::now(),
+            phantom_channel: PhantomData,
+            phantom_input: PhantomData,
+        }
+    }
+
+    fn make_callback_info(
+        &self,
+        audio_stream: &mut dyn oboe::AudioOutputStreamSafe,
+    ) -> OutputCallbackInfo {
+        OutputCallbackInfo {
+            timestamp: OutputStreamTimestamp {
+                callback: to_stream_instant(self.created.elapsed()),
+                playback: stream_instant(audio_stream),
+            },
+        }
+    }
+}
+
+impl<T: SizedSample, C: oboe::IsChannelCount> oboe::AudioOutputCallback for CpalOutputCallback<T, C>
+where
+    (T, C): oboe::IsFrameType,
+{
+    type FrameType = (T, C);
+
+    fn on_error_before_close(
+        &mut self,
+        _audio_stream: &mut dyn oboe::AudioOutputStreamSafe,
+        error: oboe::Error,
+    ) {
+        (self.error_cb)(StreamError::from(error))
+    }
+
+    fn on_error_after_close(
+        &mut self,
+        _audio_stream: &mut dyn oboe::AudioOutputStreamSafe,
+        error: oboe::Error,
+    ) {
+        (self.error_cb)(StreamError::from(error))
+    }
+
+    fn on_audio_ready(
+        &mut self,
+        audio_stream: &mut dyn oboe::AudioOutputStreamSafe,
+        audio_data: &mut [<<Self as oboe::AudioOutputCallback>::FrameType as oboe::IsFrameType>::Type],
+    ) -> oboe::DataCallbackResult {
+        let cb_info = self.make_callback_info(audio_stream);
+        let channel_count = if C::CHANNEL_COUNT == oboe::ChannelCount::Mono {
+            1
+        } else {
+            2
+        };
+        (self.data_cb)(
+            &mut unsafe {
+                Data::from_parts(
+                    audio_data.as_mut_ptr() as *mut _,
+                    audio_data.len() * channel_count,
+                    T::FORMAT,
+                )
+            },
+            &cb_info,
+        );
+        oboe::DataCallbackResult::Continue
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/wasapi/com.rs

@@ -0,0 +1,57 @@
+//! Handles COM initialization and cleanup.
+
+use super::IoError;
+use std::marker::PhantomData;
+
+use windows::Win32::Foundation::RPC_E_CHANGED_MODE;
+use windows::Win32::System::Com::{CoInitializeEx, CoUninitialize, COINIT_APARTMENTTHREADED};
+
+thread_local!(static COM_INITIALIZED: ComInitialized = {
+    unsafe {
+        // Try to initialize COM with STA by default to avoid compatibility issues with the ASIO
+        // backend (where CoInitialize() is called by the ASIO SDK) or winit (where drag and drop
+        // requires STA).
+        // This call can fail with RPC_E_CHANGED_MODE if another library initialized COM with MTA.
+        // That's OK though since COM ensures thread-safety/compatibility through marshalling when
+        // necessary.
+        let result = CoInitializeEx(None, COINIT_APARTMENTTHREADED);
+        if result.is_ok() || result == RPC_E_CHANGED_MODE {
+            ComInitialized {
+                result,
+                _ptr: PhantomData,
+            }
+        } else {
+            // COM initialization failed in another way, something is really wrong.
+            panic!(
+                "Failed to initialize COM: {}",
+                IoError::from_raw_os_error(result.0)
+            );
+        }
+    }
+});
+
+/// RAII object that guards the fact that COM is initialized.
+///
+// We store a raw pointer because it's the only way at the moment to remove `Send`/`Sync` from the
+// object.
+struct ComInitialized {
+    result: windows::core::HRESULT,
+    _ptr: PhantomData<*mut ()>,
+}
+
+impl Drop for ComInitialized {
+    #[inline]
+    fn drop(&mut self) {
+        // Need to avoid calling CoUninitialize() if CoInitializeEx failed since it may have
+        // returned RPC_E_MODE_CHANGED - which is OK, see above.
+        if self.result.is_ok() {
+            unsafe { CoUninitialize() };
+        }
+    }
+}
+
+/// Ensures that COM is initialized in this thread.
+#[inline]
+pub fn com_initialized() {
+    COM_INITIALIZED.with(|_| {});
+}

src-tauri/patches/cpal-0.15.3/src/host/wasapi/mod.rs

@@ -0,0 +1,104 @@
+pub use self::device::{
+    default_input_device, default_output_device, Device, Devices, SupportedInputConfigs,
+    SupportedOutputConfigs,
+};
+pub use self::stream::Stream;
+use crate::traits::HostTrait;
+use crate::BackendSpecificError;
+use crate::DevicesError;
+use std::io::Error as IoError;
+use windows::Win32::Media::Audio;
+
+mod com;
+mod device;
+mod stream;
+
+/// The WASAPI host, the default windows host type.
+///
+/// Note: If you use a WASAPI output device as an input device it will
+/// transparently enable loopback mode (see
+/// https://docs.microsoft.com/en-us/windows/win32/coreaudio/loopback-recording).
+#[derive(Debug)]
+pub struct Host;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        // Assume WASAPI is always available on Windows.
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        default_input_device()
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        default_output_device()
+    }
+}
+
+impl From<windows::core::Error> for BackendSpecificError {
+    fn from(error: windows::core::Error) -> Self {
+        BackendSpecificError {
+            description: format!("{}", IoError::from(error)),
+        }
+    }
+}
+
+trait ErrDeviceNotAvailable: From<BackendSpecificError> {
+    fn device_not_available() -> Self;
+}
+
+impl ErrDeviceNotAvailable for crate::BuildStreamError {
+    fn device_not_available() -> Self {
+        Self::DeviceNotAvailable
+    }
+}
+
+impl ErrDeviceNotAvailable for crate::SupportedStreamConfigsError {
+    fn device_not_available() -> Self {
+        Self::DeviceNotAvailable
+    }
+}
+
+impl ErrDeviceNotAvailable for crate::DefaultStreamConfigError {
+    fn device_not_available() -> Self {
+        Self::DeviceNotAvailable
+    }
+}
+
+impl ErrDeviceNotAvailable for crate::StreamError {
+    fn device_not_available() -> Self {
+        Self::DeviceNotAvailable
+    }
+}
+
+fn windows_err_to_cpal_err<E: ErrDeviceNotAvailable>(e: windows::core::Error) -> E {
+    windows_err_to_cpal_err_message::<E>(e, "")
+}
+
+fn windows_err_to_cpal_err_message<E: ErrDeviceNotAvailable>(
+    e: windows::core::Error,
+    message: &str,
+) -> E {
+    match e.code() {
+        Audio::AUDCLNT_E_DEVICE_INVALIDATED => E::device_not_available(),
+        _ => {
+            let description = format!("{}{}", message, e);
+            let err = BackendSpecificError { description };
+            err.into()
+        }
+    }
+}

src-tauri/patches/cpal-0.15.3/src/host/wasapi/stream.rs

@@ -0,0 +1,559 @@
+use super::windows_err_to_cpal_err;
+use crate::traits::StreamTrait;
+use crate::{
+    BackendSpecificError, Data, InputCallbackInfo, OutputCallbackInfo, PauseStreamError,
+    PlayStreamError, SampleFormat, StreamError,
+};
+use std::mem;
+use std::ptr;
+use std::sync::mpsc::{channel, Receiver, SendError, Sender};
+use std::thread::{self, JoinHandle};
+use windows::Win32::Foundation;
+use windows::Win32::Foundation::HANDLE;
+use windows::Win32::Foundation::WAIT_OBJECT_0;
+use windows::Win32::Media::Audio;
+use windows::Win32::System::SystemServices;
+use windows::Win32::System::Threading;
+
+pub struct Stream {
+    /// The high-priority audio processing thread calling callbacks.
+    /// Option used for moving out in destructor.
+    ///
+    /// TODO: Actually set the thread priority.
+    thread: Option<JoinHandle<()>>,
+
+    // Commands processed by the `run()` method that is currently running.
+    // `pending_scheduled_event` must be signalled whenever a command is added here, so that it
+    // will get picked up.
+    commands: Sender<Command>,
+
+    // This event is signalled after a new entry is added to `commands`, so that the `run()`
+    // method can be notified.
+    pending_scheduled_event: Foundation::HANDLE,
+}
+
+struct RunContext {
+    // Streams that have been created in this event loop.
+    stream: StreamInner,
+
+    // Handles corresponding to the `event` field of each element of `voices`. Must always be in
+    // sync with `voices`, except that the first element is always `pending_scheduled_event`.
+    handles: Vec<Foundation::HANDLE>,
+
+    commands: Receiver<Command>,
+}
+
+// Once we start running the eventloop, the RunContext will not be moved.
+unsafe impl Send for RunContext {}
+
+pub enum Command {
+    PlayStream,
+    PauseStream,
+    Terminate,
+}
+
+pub enum AudioClientFlow {
+    Render {
+        render_client: Audio::IAudioRenderClient,
+    },
+    Capture {
+        capture_client: Audio::IAudioCaptureClient,
+    },
+}
+
+pub struct StreamInner {
+    pub audio_client: Audio::IAudioClient,
+    pub audio_clock: Audio::IAudioClock,
+    pub client_flow: AudioClientFlow,
+    // Event that is signalled by WASAPI whenever audio data must be written.
+    pub event: Foundation::HANDLE,
+    // True if the stream is currently playing. False if paused.
+    pub playing: bool,
+    // Number of frames of audio data in the underlying buffer allocated by WASAPI.
+    pub max_frames_in_buffer: u32,
+    // Number of bytes that each frame occupies.
+    pub bytes_per_frame: u16,
+    // The configuration with which the stream was created.
+    pub config: crate::StreamConfig,
+    // The sample format with which the stream was created.
+    pub sample_format: SampleFormat,
+}
+
+impl Stream {
+    pub(crate) fn new_input<D, E>(
+        stream_inner: StreamInner,
+        mut data_callback: D,
+        mut error_callback: E,
+    ) -> Stream
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let pending_scheduled_event = unsafe {
+            Threading::CreateEventA(None, false, false, windows::core::PCSTR(ptr::null()))
+        }
+        .expect("cpal: could not create input stream event");
+        let (tx, rx) = channel();
+
+        let run_context = RunContext {
+            handles: vec![pending_scheduled_event, stream_inner.event],
+            stream: stream_inner,
+            commands: rx,
+        };
+
+        let thread = thread::Builder::new()
+            .name("cpal_wasapi_in".to_owned())
+            .spawn(move || run_input(run_context, &mut data_callback, &mut error_callback))
+            .unwrap();
+
+        Stream {
+            thread: Some(thread),
+            commands: tx,
+            pending_scheduled_event,
+        }
+    }
+
+    pub(crate) fn new_output<D, E>(
+        stream_inner: StreamInner,
+        mut data_callback: D,
+        mut error_callback: E,
+    ) -> Stream
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        let pending_scheduled_event = unsafe {
+            Threading::CreateEventA(None, false, false, windows::core::PCSTR(ptr::null()))
+        }
+        .expect("cpal: could not create output stream event");
+        let (tx, rx) = channel();
+
+        let run_context = RunContext {
+            handles: vec![pending_scheduled_event, stream_inner.event],
+            stream: stream_inner,
+            commands: rx,
+        };
+
+        let thread = thread::Builder::new()
+            .name("cpal_wasapi_out".to_owned())
+            .spawn(move || run_output(run_context, &mut data_callback, &mut error_callback))
+            .unwrap();
+
+        Stream {
+            thread: Some(thread),
+            commands: tx,
+            pending_scheduled_event,
+        }
+    }
+
+    #[inline]
+    fn push_command(&self, command: Command) -> Result<(), SendError<Command>> {
+        self.commands.send(command)?;
+        unsafe {
+            Threading::SetEvent(self.pending_scheduled_event).unwrap();
+        }
+        Ok(())
+    }
+}
+
+impl Drop for Stream {
+    #[inline]
+    fn drop(&mut self) {
+        if self.push_command(Command::Terminate).is_ok() {
+            self.thread.take().unwrap().join().unwrap();
+            unsafe {
+                let _ = Foundation::CloseHandle(self.pending_scheduled_event);
+            }
+        }
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        self.push_command(Command::PlayStream)
+            .map_err(|_| crate::error::PlayStreamError::DeviceNotAvailable)?;
+        Ok(())
+    }
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        self.push_command(Command::PauseStream)
+            .map_err(|_| crate::error::PauseStreamError::DeviceNotAvailable)?;
+        Ok(())
+    }
+}
+
+impl Drop for StreamInner {
+    #[inline]
+    fn drop(&mut self) {
+        unsafe {
+            let _ = Foundation::CloseHandle(self.event);
+        }
+    }
+}
+
+// Process any pending commands that are queued within the `RunContext`.
+// Returns `true` if the loop should continue running, `false` if it should terminate.
+fn process_commands(run_context: &mut RunContext) -> Result<bool, StreamError> {
+    // Process the pending commands.
+    for command in run_context.commands.try_iter() {
+        match command {
+            Command::PlayStream => unsafe {
+                if !run_context.stream.playing {
+                    run_context
+                        .stream
+                        .audio_client
+                        .Start()
+                        .map_err(windows_err_to_cpal_err::<StreamError>)?;
+                    run_context.stream.playing = true;
+                }
+            },
+            Command::PauseStream => unsafe {
+                if run_context.stream.playing {
+                    run_context
+                        .stream
+                        .audio_client
+                        .Stop()
+                        .map_err(windows_err_to_cpal_err::<StreamError>)?;
+                    run_context.stream.playing = false;
+                }
+            },
+            Command::Terminate => {
+                return Ok(false);
+            }
+        }
+    }
+
+    Ok(true)
+}
+// Wait for any of the given handles to be signalled.
+//
+// Returns the index of the `handle` that was signalled, or an `Err` if
+// `WaitForMultipleObjectsEx` fails.
+//
+// This is called when the `run` thread is ready to wait for the next event. The
+// next event might be some command submitted by the user (the first handle) or
+// might indicate that one of the streams is ready to deliver or receive audio.
+fn wait_for_handle_signal(handles: &[Foundation::HANDLE]) -> Result<usize, BackendSpecificError> {
+    debug_assert!(handles.len() <= SystemServices::MAXIMUM_WAIT_OBJECTS as usize);
+    let result = unsafe {
+        Threading::WaitForMultipleObjectsEx(
+            handles,
+            false,               // Don't wait for all, just wait for the first
+            Threading::INFINITE, // TODO: allow setting a timeout
+            false,               // irrelevant parameter here
+        )
+    };
+    if result == Foundation::WAIT_FAILED {
+        let err = unsafe { Foundation::GetLastError() };
+        let description = format!("`WaitForMultipleObjectsEx failed: {:?}", err);
+        let err = BackendSpecificError { description };
+        return Err(err);
+    }
+    // Notifying the corresponding task handler.
+    let handle_idx = (result.0 - WAIT_OBJECT_0.0) as usize;
+    Ok(handle_idx)
+}
+
+// Get the number of available frames that are available for writing/reading.
+fn get_available_frames(stream: &StreamInner) -> Result<u32, StreamError> {
+    unsafe {
+        let padding = stream
+            .audio_client
+            .GetCurrentPadding()
+            .map_err(windows_err_to_cpal_err::<StreamError>)?;
+        Ok(stream.max_frames_in_buffer - padding)
+    }
+}
+
+fn run_input(
+    mut run_ctxt: RunContext,
+    data_callback: &mut dyn FnMut(&Data, &InputCallbackInfo),
+    error_callback: &mut dyn FnMut(StreamError),
+) {
+    boost_current_thread_priority();
+
+    loop {
+        match process_commands_and_await_signal(&mut run_ctxt, error_callback) {
+            Some(ControlFlow::Break) => break,
+            Some(ControlFlow::Continue) => continue,
+            None => (),
+        }
+        let capture_client = match run_ctxt.stream.client_flow {
+            AudioClientFlow::Capture { ref capture_client } => capture_client.clone(),
+            _ => unreachable!(),
+        };
+        match process_input(
+            &run_ctxt.stream,
+            capture_client,
+            data_callback,
+            error_callback,
+        ) {
+            ControlFlow::Break => break,
+            ControlFlow::Continue => continue,
+        }
+    }
+}
+
+fn run_output(
+    mut run_ctxt: RunContext,
+    data_callback: &mut dyn FnMut(&mut Data, &OutputCallbackInfo),
+    error_callback: &mut dyn FnMut(StreamError),
+) {
+    boost_current_thread_priority();
+
+    loop {
+        match process_commands_and_await_signal(&mut run_ctxt, error_callback) {
+            Some(ControlFlow::Break) => break,
+            Some(ControlFlow::Continue) => continue,
+            None => (),
+        }
+        let render_client = match run_ctxt.stream.client_flow {
+            AudioClientFlow::Render { ref render_client } => render_client.clone(),
+            _ => unreachable!(),
+        };
+        match process_output(
+            &run_ctxt.stream,
+            render_client,
+            data_callback,
+            error_callback,
+        ) {
+            ControlFlow::Break => break,
+            ControlFlow::Continue => continue,
+        }
+    }
+}
+
+fn boost_current_thread_priority() {
+    unsafe {
+        let thread_id = Threading::GetCurrentThreadId();
+
+        let _ = Threading::SetThreadPriority(
+            HANDLE(thread_id as isize),
+            Threading::THREAD_PRIORITY_TIME_CRITICAL,
+        );
+    }
+}
+
+enum ControlFlow {
+    Break,
+    Continue,
+}
+
+fn process_commands_and_await_signal(
+    run_context: &mut RunContext,
+    error_callback: &mut dyn FnMut(StreamError),
+) -> Option<ControlFlow> {
+    // Process queued commands.
+    match process_commands(run_context) {
+        Ok(true) => (),
+        Ok(false) => return Some(ControlFlow::Break),
+        Err(err) => {
+            error_callback(err);
+            return Some(ControlFlow::Break);
+        }
+    };
+
+    // Wait for any of the handles to be signalled.
+    let handle_idx = match wait_for_handle_signal(&run_context.handles) {
+        Ok(idx) => idx,
+        Err(err) => {
+            error_callback(err.into());
+            return Some(ControlFlow::Break);
+        }
+    };
+
+    // If `handle_idx` is 0, then it's `pending_scheduled_event` that was signalled in
+    // order for us to pick up the pending commands. Otherwise, a stream needs data.
+    if handle_idx == 0 {
+        return Some(ControlFlow::Continue);
+    }
+
+    None
+}
+
+// The loop for processing pending input data.
+fn process_input(
+    stream: &StreamInner,
+    capture_client: Audio::IAudioCaptureClient,
+    data_callback: &mut dyn FnMut(&Data, &InputCallbackInfo),
+    error_callback: &mut dyn FnMut(StreamError),
+) -> ControlFlow {
+    unsafe {
+        // Get the available data in the shared buffer.
+        let mut buffer: *mut u8 = ptr::null_mut();
+        let mut flags = mem::MaybeUninit::uninit();
+        loop {
+            let mut frames_available = match capture_client.GetNextPacketSize() {
+                Ok(0) => return ControlFlow::Continue,
+                Ok(f) => f,
+                Err(err) => {
+                    error_callback(windows_err_to_cpal_err(err));
+                    return ControlFlow::Break;
+                }
+            };
+            let mut qpc_position: u64 = 0;
+            let result = capture_client.GetBuffer(
+                &mut buffer,
+                &mut frames_available,
+                flags.as_mut_ptr(),
+                None,
+                Some(&mut qpc_position),
+            );
+
+            match result {
+                // TODO: Can this happen?
+                Err(e) if e.code() == Audio::AUDCLNT_S_BUFFER_EMPTY => continue,
+                Err(e) => {
+                    error_callback(windows_err_to_cpal_err(e));
+                    return ControlFlow::Break;
+                }
+                Ok(_) => (),
+            }
+
+            debug_assert!(!buffer.is_null());
+
+            let data = buffer as *mut ();
+            let len = frames_available as usize * stream.bytes_per_frame as usize
+                / stream.sample_format.sample_size();
+            let data = Data::from_parts(data, len, stream.sample_format);
+
+            // The `qpc_position` is in 100 nanosecond units. Convert it to nanoseconds.
+            let timestamp = match input_timestamp(stream, qpc_position) {
+                Ok(ts) => ts,
+                Err(err) => {
+                    error_callback(err);
+                    return ControlFlow::Break;
+                }
+            };
+            let info = InputCallbackInfo { timestamp };
+            data_callback(&data, &info);
+
+            // Release the buffer.
+            let result = capture_client
+                .ReleaseBuffer(frames_available)
+                .map_err(windows_err_to_cpal_err);
+            if let Err(err) = result {
+                error_callback(err);
+                return ControlFlow::Break;
+            }
+        }
+    }
+}
+
+// The loop for writing output data.
+fn process_output(
+    stream: &StreamInner,
+    render_client: Audio::IAudioRenderClient,
+    data_callback: &mut dyn FnMut(&mut Data, &OutputCallbackInfo),
+    error_callback: &mut dyn FnMut(StreamError),
+) -> ControlFlow {
+    // The number of frames available for writing.
+    let frames_available = match get_available_frames(stream) {
+        Ok(0) => return ControlFlow::Continue, // TODO: Can this happen?
+        Ok(n) => n,
+        Err(err) => {
+            error_callback(err);
+            return ControlFlow::Break;
+        }
+    };
+
+    unsafe {
+        let buffer = match render_client.GetBuffer(frames_available) {
+            Ok(b) => b,
+            Err(e) => {
+                error_callback(windows_err_to_cpal_err(e));
+                return ControlFlow::Break;
+            }
+        };
+
+        debug_assert!(!buffer.is_null());
+
+        let data = buffer as *mut ();
+        let len = frames_available as usize * stream.bytes_per_frame as usize
+            / stream.sample_format.sample_size();
+        let mut data = Data::from_parts(data, len, stream.sample_format);
+        let sample_rate = stream.config.sample_rate;
+        let timestamp = match output_timestamp(stream, frames_available, sample_rate) {
+            Ok(ts) => ts,
+            Err(err) => {
+                error_callback(err);
+                return ControlFlow::Break;
+            }
+        };
+        let info = OutputCallbackInfo { timestamp };
+        data_callback(&mut data, &info);
+
+        if let Err(err) = render_client.ReleaseBuffer(frames_available, 0) {
+            error_callback(windows_err_to_cpal_err(err));
+            return ControlFlow::Break;
+        }
+    }
+
+    ControlFlow::Continue
+}
+
+/// Convert the given duration in frames at the given sample rate to a `std::time::Duration`.
+fn frames_to_duration(frames: u32, rate: crate::SampleRate) -> std::time::Duration {
+    let secsf = frames as f64 / rate.0 as f64;
+    let secs = secsf as u64;
+    let nanos = ((secsf - secs as f64) * 1_000_000_000.0) as u32;
+    std::time::Duration::new(secs, nanos)
+}
+
+/// Use the stream's `IAudioClock` to produce the current stream instant.
+///
+/// Uses the QPC position produced via the `GetPosition` method.
+fn stream_instant(stream: &StreamInner) -> Result<crate::StreamInstant, StreamError> {
+    let mut position: u64 = 0;
+    let mut qpc_position: u64 = 0;
+    unsafe {
+        stream
+            .audio_clock
+            .GetPosition(&mut position, Some(&mut qpc_position))
+            .map_err(windows_err_to_cpal_err::<StreamError>)?;
+    };
+    // The `qpc_position` is in 100 nanosecond units. Convert it to nanoseconds.
+    let qpc_nanos = qpc_position as i128 * 100;
+    let instant = crate::StreamInstant::from_nanos_i128(qpc_nanos)
+        .expect("performance counter out of range of `StreamInstant` representation");
+    Ok(instant)
+}
+
+/// Produce the input stream timestamp.
+///
+/// `buffer_qpc_position` is the `qpc_position` returned via the `GetBuffer` call on the capture
+/// client. It represents the instant at which the first sample of the retrieved buffer was
+/// captured.
+fn input_timestamp(
+    stream: &StreamInner,
+    buffer_qpc_position: u64,
+) -> Result<crate::InputStreamTimestamp, StreamError> {
+    // The `qpc_position` is in 100 nanosecond units. Convert it to nanoseconds.
+    let qpc_nanos = buffer_qpc_position as i128 * 100;
+    let capture = crate::StreamInstant::from_nanos_i128(qpc_nanos)
+        .expect("performance counter out of range of `StreamInstant` representation");
+    let callback = stream_instant(stream)?;
+    Ok(crate::InputStreamTimestamp { capture, callback })
+}
+
+/// Produce the output stream timestamp.
+///
+/// `frames_available` is the number of frames available for writing as reported by subtracting the
+/// result of `GetCurrentPadding` from the maximum buffer size.
+///
+/// `sample_rate` is the rate at which audio frames are processed by the device.
+///
+/// TODO: The returned `playback` is an estimate that assumes audio is delivered immediately after
+/// `frames_available` are consumed. The reality is that there is likely a tiny amount of latency
+/// after this, but not sure how to determine this.
+fn output_timestamp(
+    stream: &StreamInner,
+    frames_available: u32,
+    sample_rate: crate::SampleRate,
+) -> Result<crate::OutputStreamTimestamp, StreamError> {
+    let callback = stream_instant(stream)?;
+    let buffer_duration = frames_to_duration(frames_available, sample_rate);
+    let playback = callback
+        .add(buffer_duration)
+        .expect("`playback` occurs beyond representation supported by `StreamInstant`");
+    Ok(crate::OutputStreamTimestamp { callback, playback })
+}

src-tauri/patches/cpal-0.15.3/src/host/webaudio/mod.rs

@@ -0,0 +1,528 @@
+extern crate js_sys;
+extern crate wasm_bindgen;
+extern crate web_sys;
+
+use self::js_sys::eval;
+use self::wasm_bindgen::prelude::*;
+use self::wasm_bindgen::JsCast;
+use self::web_sys::{AudioContext, AudioContextOptions};
+use crate::traits::{DeviceTrait, HostTrait, StreamTrait};
+use crate::{
+    BackendSpecificError, BufferSize, BuildStreamError, Data, DefaultStreamConfigError,
+    DeviceNameError, DevicesError, InputCallbackInfo, OutputCallbackInfo, PauseStreamError,
+    PlayStreamError, SampleFormat, SampleRate, StreamConfig, StreamError, SupportedBufferSize,
+    SupportedStreamConfig, SupportedStreamConfigRange, SupportedStreamConfigsError,
+};
+use std::ops::DerefMut;
+use std::sync::{Arc, Mutex, RwLock};
+use std::time::Duration;
+
+/// Content is false if the iterator is empty.
+pub struct Devices(bool);
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Device;
+
+pub struct Host;
+
+pub struct Stream {
+    ctx: Arc<AudioContext>,
+    on_ended_closures: Vec<Arc<RwLock<Option<Closure<dyn FnMut()>>>>>,
+    config: StreamConfig,
+    buffer_size_frames: usize,
+}
+
+pub type SupportedInputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+pub type SupportedOutputConfigs = ::std::vec::IntoIter<SupportedStreamConfigRange>;
+
+const MIN_CHANNELS: u16 = 1;
+const MAX_CHANNELS: u16 = 32;
+const MIN_SAMPLE_RATE: SampleRate = SampleRate(8_000);
+const MAX_SAMPLE_RATE: SampleRate = SampleRate(96_000);
+const DEFAULT_SAMPLE_RATE: SampleRate = SampleRate(44_100);
+const MIN_BUFFER_SIZE: u32 = 1;
+const MAX_BUFFER_SIZE: u32 = u32::MAX;
+const DEFAULT_BUFFER_SIZE: usize = 2048;
+const SUPPORTED_SAMPLE_FORMAT: SampleFormat = SampleFormat::F32;
+
+impl Host {
+    pub fn new() -> Result<Self, crate::HostUnavailable> {
+        Ok(Host)
+    }
+}
+
+impl HostTrait for Host {
+    type Devices = Devices;
+    type Device = Device;
+
+    fn is_available() -> bool {
+        // Assume this host is always available on webaudio.
+        true
+    }
+
+    fn devices(&self) -> Result<Self::Devices, DevicesError> {
+        Devices::new()
+    }
+
+    fn default_input_device(&self) -> Option<Self::Device> {
+        default_input_device()
+    }
+
+    fn default_output_device(&self) -> Option<Self::Device> {
+        default_output_device()
+    }
+}
+
+impl Devices {
+    fn new() -> Result<Self, DevicesError> {
+        Ok(Self::default())
+    }
+}
+
+impl Device {
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Ok("Default Device".to_owned())
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<SupportedInputConfigs, SupportedStreamConfigsError> {
+        // TODO
+        Ok(Vec::new().into_iter())
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<SupportedOutputConfigs, SupportedStreamConfigsError> {
+        let buffer_size = SupportedBufferSize::Range {
+            min: MIN_BUFFER_SIZE,
+            max: MAX_BUFFER_SIZE,
+        };
+        let configs: Vec<_> = (MIN_CHANNELS..=MAX_CHANNELS)
+            .map(|channels| SupportedStreamConfigRange {
+                channels,
+                min_sample_rate: MIN_SAMPLE_RATE,
+                max_sample_rate: MAX_SAMPLE_RATE,
+                buffer_size: buffer_size.clone(),
+                sample_format: SUPPORTED_SAMPLE_FORMAT,
+            })
+            .collect();
+        Ok(configs.into_iter())
+    }
+
+    #[inline]
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        // TODO
+        Err(DefaultStreamConfigError::StreamTypeNotSupported)
+    }
+
+    #[inline]
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        const EXPECT: &str = "expected at least one valid webaudio stream config";
+        let config = self
+            .supported_output_configs()
+            .expect(EXPECT)
+            .max_by(|a, b| a.cmp_default_heuristics(b))
+            .unwrap()
+            .with_sample_rate(DEFAULT_SAMPLE_RATE);
+
+        Ok(config)
+    }
+}
+
+impl DeviceTrait for Device {
+    type SupportedInputConfigs = SupportedInputConfigs;
+    type SupportedOutputConfigs = SupportedOutputConfigs;
+    type Stream = Stream;
+
+    #[inline]
+    fn name(&self) -> Result<String, DeviceNameError> {
+        Device::name(self)
+    }
+
+    #[inline]
+    fn supported_input_configs(
+        &self,
+    ) -> Result<Self::SupportedInputConfigs, SupportedStreamConfigsError> {
+        Device::supported_input_configs(self)
+    }
+
+    #[inline]
+    fn supported_output_configs(
+        &self,
+    ) -> Result<Self::SupportedOutputConfigs, SupportedStreamConfigsError> {
+        Device::supported_output_configs(self)
+    }
+
+    #[inline]
+    fn default_input_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_input_config(self)
+    }
+
+    #[inline]
+    fn default_output_config(&self) -> Result<SupportedStreamConfig, DefaultStreamConfigError> {
+        Device::default_output_config(self)
+    }
+
+    fn build_input_stream_raw<D, E>(
+        &self,
+        _config: &StreamConfig,
+        _sample_format: SampleFormat,
+        _data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&Data, &InputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        // TODO
+        Err(BuildStreamError::StreamConfigNotSupported)
+    }
+
+    /// Create an output stream.
+    fn build_output_stream_raw<D, E>(
+        &self,
+        config: &StreamConfig,
+        sample_format: SampleFormat,
+        data_callback: D,
+        _error_callback: E,
+        _timeout: Option<Duration>,
+    ) -> Result<Self::Stream, BuildStreamError>
+    where
+        D: FnMut(&mut Data, &OutputCallbackInfo) + Send + 'static,
+        E: FnMut(StreamError) + Send + 'static,
+    {
+        if !valid_config(config, sample_format) {
+            return Err(BuildStreamError::StreamConfigNotSupported);
+        }
+
+        let n_channels = config.channels as usize;
+
+        let buffer_size_frames = match config.buffer_size {
+            BufferSize::Fixed(v) => {
+                if v == 0 {
+                    return Err(BuildStreamError::StreamConfigNotSupported);
+                } else {
+                    v as usize
+                }
+            }
+            BufferSize::Default => DEFAULT_BUFFER_SIZE,
+        };
+        let buffer_size_samples = buffer_size_frames * n_channels;
+        let buffer_time_step_secs = buffer_time_step_secs(buffer_size_frames, config.sample_rate);
+
+        let data_callback = Arc::new(Mutex::new(Box::new(data_callback)));
+
+        // Create the WebAudio stream.
+        let mut stream_opts = AudioContextOptions::new();
+        stream_opts.sample_rate(config.sample_rate.0 as f32);
+        let ctx = AudioContext::new_with_context_options(&stream_opts).map_err(
+            |err| -> BuildStreamError {
+                let description = format!("{:?}", err);
+                let err = BackendSpecificError { description };
+                err.into()
+            },
+        )?;
+
+        let destination = ctx.destination();
+
+        // If possible, set the destination's channel_count to the given config.channel.
+        // If not, fallback on the default destination channel_count to keep previous behavior
+        // and do not return an error.
+        if config.channels as u32 <= destination.max_channel_count() {
+            destination.set_channel_count(config.channels as u32);
+        }
+
+        let ctx = Arc::new(ctx);
+
+        // A container for managing the lifecycle of the audio callbacks.
+        let mut on_ended_closures: Vec<Arc<RwLock<Option<Closure<dyn FnMut()>>>>> = Vec::new();
+
+        // A cursor keeping track of the current time at which new frames should be scheduled.
+        let time = Arc::new(RwLock::new(0f64));
+
+        // Create a set of closures / callbacks which will continuously fetch and schedule sample
+        // playback. Starting with two workers, e.g. a front and back buffer so that audio frames
+        // can be fetched in the background.
+        for _i in 0..2 {
+            let data_callback_handle = data_callback.clone();
+            let ctx_handle = ctx.clone();
+            let time_handle = time.clone();
+
+            // A set of temporary buffers to be used for intermediate sample transformation steps.
+            let mut temporary_buffer = vec![0f32; buffer_size_samples];
+            let mut temporary_channel_buffer = vec![0f32; buffer_size_frames];
+
+            #[cfg(target_feature = "atomics")]
+            let temporary_channel_array_view: js_sys::Float32Array;
+            #[cfg(target_feature = "atomics")]
+            {
+                let temporary_channel_array = js_sys::ArrayBuffer::new(
+                    (std::mem::size_of::<f32>() * buffer_size_frames) as u32,
+                );
+                temporary_channel_array_view = js_sys::Float32Array::new(&temporary_channel_array);
+            }
+
+            // Create a webaudio buffer which will be reused to avoid allocations.
+            let ctx_buffer = ctx
+                .create_buffer(
+                    config.channels as u32,
+                    buffer_size_frames as u32,
+                    config.sample_rate.0 as f32,
+                )
+                .map_err(|err| -> BuildStreamError {
+                    let description = format!("{:?}", err);
+                    let err = BackendSpecificError { description };
+                    err.into()
+                })?;
+
+            // A self reference to this closure for passing to future audio event calls.
+            let on_ended_closure: Arc<RwLock<Option<Closure<dyn FnMut()>>>> =
+                Arc::new(RwLock::new(None));
+            let on_ended_closure_handle = on_ended_closure.clone();
+
+            on_ended_closure
+                .write()
+                .unwrap()
+                .replace(Closure::wrap(Box::new(move || {
+                    let now = ctx_handle.current_time();
+                    let time_at_start_of_buffer = {
+                        let time_at_start_of_buffer = time_handle
+                            .read()
+                            .expect("Unable to get a read lock on the time cursor");
+                        // Synchronise first buffer as necessary (eg. keep the time value
+                        // referenced to the context clock).
+                        if *time_at_start_of_buffer > 0.001 {
+                            *time_at_start_of_buffer
+                        } else {
+                            // 25ms of time to fetch the first sample data, increase to avoid
+                            // initial underruns.
+                            now + 0.025
+                        }
+                    };
+
+                    // Populate the sample data into an interleaved temporary buffer.
+                    {
+                        let len = temporary_buffer.len();
+                        let data = temporary_buffer.as_mut_ptr() as *mut ();
+                        let mut data = unsafe { Data::from_parts(data, len, sample_format) };
+                        let mut data_callback = data_callback_handle.lock().unwrap();
+                        let callback = crate::StreamInstant::from_secs_f64(now);
+                        let playback = crate::StreamInstant::from_secs_f64(time_at_start_of_buffer);
+                        let timestamp = crate::OutputStreamTimestamp { callback, playback };
+                        let info = OutputCallbackInfo { timestamp };
+                        (data_callback.deref_mut())(&mut data, &info);
+                    }
+
+                    // Deinterleave the sample data and copy into the audio context buffer.
+                    // We do not reference the audio context buffer directly e.g. getChannelData.
+                    // As wasm-bindgen only gives us a copy, not a direct reference.
+                    for channel in 0..n_channels {
+                        for i in 0..buffer_size_frames {
+                            temporary_channel_buffer[i] =
+                                temporary_buffer[n_channels * i + channel];
+                        }
+
+                        #[cfg(not(target_feature = "atomics"))]
+                        {
+                            ctx_buffer
+                                .copy_to_channel(&mut temporary_channel_buffer, channel as i32)
+                                .expect(
+                                    "Unable to write sample data into the audio context buffer",
+                                );
+                        }
+
+                        // copyToChannel cannot be directly copied into from a SharedArrayBuffer,
+                        // which WASM memory is backed by if the 'atomics' flag is enabled.
+                        // This workaround copies the data into an intermediary buffer first.
+                        // There's a chance browsers may eventually relax that requirement.
+                        // See this issue: https://github.com/WebAudio/web-audio-api/issues/2565
+                        #[cfg(target_feature = "atomics")]
+                        {
+                            temporary_channel_array_view.copy_from(&mut temporary_channel_buffer);
+                            ctx_buffer
+                                .unchecked_ref::<ExternalArrayAudioBuffer>()
+                                .copy_to_channel(&temporary_channel_array_view, channel as i32)
+                                .expect(
+                                    "Unable to write sample data into the audio context buffer",
+                                );
+                        }
+                    }
+
+                    // Create an AudioBufferSourceNode, schedule it to playback the reused buffer
+                    // in the future.
+                    let source = ctx_handle
+                        .create_buffer_source()
+                        .expect("Unable to create a webaudio buffer source");
+                    source.set_buffer(Some(&ctx_buffer));
+                    source
+                        .connect_with_audio_node(&ctx_handle.destination())
+                        .expect(
+                        "Unable to connect the web audio buffer source to the context destination",
+                    );
+                    source.set_onended(Some(
+                        on_ended_closure_handle
+                            .read()
+                            .unwrap()
+                            .as_ref()
+                            .unwrap()
+                            .as_ref()
+                            .unchecked_ref(),
+                    ));
+
+                    source
+                        .start_with_when(time_at_start_of_buffer)
+                        .expect("Unable to start the webaudio buffer source");
+
+                    // Keep track of when the next buffer worth of samples should be played.
+                    *time_handle.write().unwrap() = time_at_start_of_buffer + buffer_time_step_secs;
+                }) as Box<dyn FnMut()>));
+
+            on_ended_closures.push(on_ended_closure);
+        }
+
+        Ok(Stream {
+            ctx,
+            on_ended_closures,
+            config: config.clone(),
+            buffer_size_frames,
+        })
+    }
+}
+
+impl Stream {
+    /// Return the [`AudioContext`](https://developer.mozilla.org/docs/Web/API/AudioContext) used
+    /// by this stream.
+    pub fn audio_context(&self) -> &AudioContext {
+        &*self.ctx
+    }
+}
+
+impl StreamTrait for Stream {
+    fn play(&self) -> Result<(), PlayStreamError> {
+        let window = web_sys::window().unwrap();
+        match self.ctx.resume() {
+            Ok(_) => {
+                // Begin webaudio playback, initially scheduling the closures to fire on a timeout
+                // event.
+                let mut offset_ms = 10;
+                let time_step_secs =
+                    buffer_time_step_secs(self.buffer_size_frames, self.config.sample_rate);
+                let time_step_ms = (time_step_secs * 1_000.0) as i32;
+                for on_ended_closure in self.on_ended_closures.iter() {
+                    window
+                        .set_timeout_with_callback_and_timeout_and_arguments_0(
+                            on_ended_closure
+                                .read()
+                                .unwrap()
+                                .as_ref()
+                                .unwrap()
+                                .as_ref()
+                                .unchecked_ref(),
+                            offset_ms,
+                        )
+                        .unwrap();
+                    offset_ms += time_step_ms;
+                }
+                Ok(())
+            }
+            Err(err) => {
+                let description = format!("{:?}", err);
+                let err = BackendSpecificError { description };
+                Err(err.into())
+            }
+        }
+    }
+
+    fn pause(&self) -> Result<(), PauseStreamError> {
+        match self.ctx.suspend() {
+            Ok(_) => Ok(()),
+            Err(err) => {
+                let description = format!("{:?}", err);
+                let err = BackendSpecificError { description };
+                Err(err.into())
+            }
+        }
+    }
+}
+
+impl Drop for Stream {
+    fn drop(&mut self) {
+        let _ = self.ctx.close();
+    }
+}
+
+impl Default for Devices {
+    fn default() -> Devices {
+        // We produce an empty iterator if the WebAudio API isn't available.
+        Devices(is_webaudio_available())
+    }
+}
+
+impl Iterator for Devices {
+    type Item = Device;
+    #[inline]
+    fn next(&mut self) -> Option<Device> {
+        if self.0 {
+            self.0 = false;
+            Some(Device)
+        } else {
+            None
+        }
+    }
+}
+
+#[inline]
+fn default_input_device() -> Option<Device> {
+    // TODO
+    None
+}
+
+#[inline]
+fn default_output_device() -> Option<Device> {
+    if is_webaudio_available() {
+        Some(Device)
+    } else {
+        None
+    }
+}
+
+// Detects whether the `AudioContext` global variable is available.
+fn is_webaudio_available() -> bool {
+    if let Ok(audio_context_is_defined) = eval("typeof AudioContext !== 'undefined'") {
+        audio_context_is_defined.as_bool().unwrap()
+    } else {
+        false
+    }
+}
+
+// Whether or not the given stream configuration is valid for building a stream.
+fn valid_config(conf: &StreamConfig, sample_format: SampleFormat) -> bool {
+    conf.channels <= MAX_CHANNELS
+        && conf.channels >= MIN_CHANNELS
+        && conf.sample_rate <= MAX_SAMPLE_RATE
+        && conf.sample_rate >= MIN_SAMPLE_RATE
+        && sample_format == SUPPORTED_SAMPLE_FORMAT
+}
+
+fn buffer_time_step_secs(buffer_size_frames: usize, sample_rate: SampleRate) -> f64 {
+    buffer_size_frames as f64 / sample_rate.0 as f64
+}
+
+#[cfg(target_feature = "atomics")]
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(js_name = AudioBuffer)]
+    type ExternalArrayAudioBuffer;
+
+    # [wasm_bindgen(catch, method, structural, js_class = "AudioBuffer", js_name = copyToChannel)]
+    pub fn copy_to_channel(
+        this: &ExternalArrayAudioBuffer,
+        source: &js_sys::Float32Array,
+        channel_number: i32,
+    ) -> Result<(), JsValue>;
+}

src-tauri/patches/cpal-0.15.3/src/lib.rs

@@ -0,0 +1,871 @@
+//! # How to use cpal
+//!
+//! Here are some concepts cpal exposes:
+//!
+//! - A [`Host`] provides access to the available audio devices on the system.
+//!   Some platforms have more than one host available, but every platform supported by CPAL has at
+//!   least one [default_host] that is guaranteed to be available.
+//! - A [`Device`] is an audio device that may have any number of input and
+//!   output streams.
+//! - A [`Stream`] is an open flow of audio data. Input streams allow you to
+//!   receive audio data, output streams allow you to play audio data. You must choose which
+//!   [Device] will run your stream before you can create one. Often, a default device can be
+//!   retrieved via the [Host].
+//!
+//! The first step is to initialise the [`Host`]:
+//!
+//! ```
+//! use cpal::traits::HostTrait;
+//! let host = cpal::default_host();
+//! ```
+//!
+//! Then choose an available [`Device`]. The easiest way is to use the default input or output
+//! `Device` via the [`default_input_device()`] or [`default_output_device()`] methods on `host`.
+//!
+//! Alternatively, you can enumerate all the available devices with the [`devices()`] method.
+//! Beware that the `default_*_device()` functions return an `Option<Device>` in case no device
+//! is available for that stream type on the system.
+//!
+//! ```no_run
+//! # use cpal::traits::HostTrait;
+//! # let host = cpal::default_host();
+//! let device = host.default_output_device().expect("no output device available");
+//! ```
+//!
+//! Before we can create a stream, we must decide what the configuration of the audio stream is
+//! going to be.    
+//! You can query all the supported configurations with the
+//! [`supported_input_configs()`] and [`supported_output_configs()`] methods.
+//! These produce a list of [`SupportedStreamConfigRange`] structs which can later be turned into
+//! actual [`SupportedStreamConfig`] structs.
+//!
+//! If you don't want to query the list of configs,
+//! you can also build your own [`StreamConfig`] manually, but doing so could lead to an error when
+//! building the stream if the config is not supported by the device.
+//!
+//! > **Note**: the `supported_input/output_configs()` methods
+//! > could return an error for example if the device has been disconnected.
+//!
+//! ```no_run
+//! use cpal::traits::{DeviceTrait, HostTrait};
+//! # let host = cpal::default_host();
+//! # let device = host.default_output_device().unwrap();
+//! let mut supported_configs_range = device.supported_output_configs()
+//!     .expect("error while querying configs");
+//! let supported_config = supported_configs_range.next()
+//!     .expect("no supported config?!")
+//!     .with_max_sample_rate();
+//! ```
+//!
+//! Now that we have everything for the stream, we are ready to create it from our selected device:
+//!
+//! ```no_run
+//! use cpal::Data;
+//! use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+//! # let host = cpal::default_host();
+//! # let device = host.default_output_device().unwrap();
+//! # let config = device.default_output_config().unwrap().into();
+//! let stream = device.build_output_stream(
+//!     &config,
+//!     move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
+//!         // react to stream events and read or write stream data here.
+//!     },
+//!     move |err| {
+//!         // react to errors here.
+//!     },
+//!     None // None=blocking, Some(Duration)=timeout
+//! );
+//! ```
+//!
+//! While the stream is running, the selected audio device will periodically call the data callback
+//! that was passed to the function. The callback is passed an instance of either [`&Data` or
+//! `&mut Data`](Data) depending on whether the stream is an input stream or output stream respectively.
+//!
+//! > **Note**: Creating and running a stream will *not* block the thread. On modern platforms, the
+//! > given callback is called by a dedicated, high-priority thread responsible for delivering
+//! > audio data to the system's audio device in a timely manner. On older platforms that only
+//! > provide a blocking API (e.g. ALSA), CPAL will create a thread in order to consistently
+//! > provide non-blocking behaviour (currently this is a thread per stream, but this may change to
+//! > use a single thread for all streams). *If this is an issue for your platform or design,
+//! > please share your issue and use-case with the CPAL team on the GitHub issue tracker for
+//! > consideration.*
+//!
+//! In this example, we simply fill the given output buffer with silence.
+//!
+//! ```no_run
+//! use cpal::{Data, Sample, SampleFormat, FromSample};
+//! use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+//! # let host = cpal::default_host();
+//! # let device = host.default_output_device().unwrap();
+//! # let supported_config = device.default_output_config().unwrap();
+//! let err_fn = |err| eprintln!("an error occurred on the output audio stream: {}", err);
+//! let sample_format = supported_config.sample_format();
+//! let config = supported_config.into();
+//! let stream = match sample_format {
+//!     SampleFormat::F32 => device.build_output_stream(&config, write_silence::<f32>, err_fn, None),
+//!     SampleFormat::I16 => device.build_output_stream(&config, write_silence::<i16>, err_fn, None),
+//!     SampleFormat::U16 => device.build_output_stream(&config, write_silence::<u16>, err_fn, None),
+//!     sample_format => panic!("Unsupported sample format '{sample_format}'")
+//! }.unwrap();
+//!
+//! fn write_silence<T: Sample>(data: &mut [T], _: &cpal::OutputCallbackInfo) {
+//!     for sample in data.iter_mut() {
+//!         *sample = Sample::EQUILIBRIUM;
+//!     }
+//! }
+//! ```
+//!
+//! Not all platforms automatically run the stream upon creation. To ensure the stream has started,
+//! we can use [`Stream::play`](traits::StreamTrait::play).
+//!
+//! ```no_run
+//! # use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+//! # let host = cpal::default_host();
+//! # let device = host.default_output_device().unwrap();
+//! # let supported_config = device.default_output_config().unwrap();
+//! # let sample_format = supported_config.sample_format();
+//! # let config = supported_config.into();
+//! # let data_fn = move |_data: &mut cpal::Data, _: &cpal::OutputCallbackInfo| {};
+//! # let err_fn = move |_err| {};
+//! # let stream = device.build_output_stream_raw(&config, sample_format, data_fn, err_fn, None).unwrap();
+//! stream.play().unwrap();
+//! ```
+//!
+//! Some devices support pausing the audio stream. This can be useful for saving energy in moments
+//! of silence.
+//!
+//! ```no_run
+//! # use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+//! # let host = cpal::default_host();
+//! # let device = host.default_output_device().unwrap();
+//! # let supported_config = device.default_output_config().unwrap();
+//! # let sample_format = supported_config.sample_format();
+//! # let config = supported_config.into();
+//! # let data_fn = move |_data: &mut cpal::Data, _: &cpal::OutputCallbackInfo| {};
+//! # let err_fn = move |_err| {};
+//! # let stream = device.build_output_stream_raw(&config, sample_format, data_fn, err_fn, None).unwrap();
+//! stream.pause().unwrap();
+//! ```
+//!
+//! [`default_input_device()`]: traits::HostTrait::default_input_device
+//! [`default_output_device()`]: traits::HostTrait::default_output_device
+//! [`devices()`]: traits::HostTrait::devices
+//! [`supported_input_configs()`]: traits::DeviceTrait::supported_input_configs
+//! [`supported_output_configs()`]: traits::DeviceTrait::supported_output_configs
+
+#![recursion_limit = "2048"]
+
+// Extern crate declarations with `#[macro_use]` must unfortunately be at crate root.
+#[cfg(target_os = "emscripten")]
+#[macro_use]
+extern crate wasm_bindgen;
+#[cfg(target_os = "emscripten")]
+extern crate js_sys;
+#[cfg(target_os = "emscripten")]
+extern crate web_sys;
+
+pub use error::*;
+pub use platform::{
+    available_hosts, default_host, host_from_id, Device, Devices, Host, HostId, Stream,
+    SupportedInputConfigs, SupportedOutputConfigs, ALL_HOSTS,
+};
+pub use samples_formats::{FromSample, Sample, SampleFormat, SizedSample, I24, I48, U24, U48};
+use std::convert::TryInto;
+use std::ops::{Div, Mul};
+use std::time::Duration;
+#[cfg(target_os = "emscripten")]
+use wasm_bindgen::prelude::*;
+
+mod error;
+mod host;
+pub mod platform;
+mod samples_formats;
+pub mod traits;
+
+/// A host's device iterator yielding only *input* devices.
+pub type InputDevices<I> = std::iter::Filter<I, fn(&<I as Iterator>::Item) -> bool>;
+
+/// A host's device iterator yielding only *output* devices.
+pub type OutputDevices<I> = std::iter::Filter<I, fn(&<I as Iterator>::Item) -> bool>;
+
+/// Number of channels.
+pub type ChannelCount = u16;
+
+/// The number of samples processed per second for a single channel of audio.
+#[cfg_attr(target_os = "emscripten", wasm_bindgen)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub struct SampleRate(pub u32);
+
+impl<T> Mul<T> for SampleRate
+where
+    u32: Mul<T, Output = u32>,
+{
+    type Output = Self;
+    fn mul(self, rhs: T) -> Self {
+        SampleRate(self.0 * rhs)
+    }
+}
+
+impl<T> Div<T> for SampleRate
+where
+    u32: Div<T, Output = u32>,
+{
+    type Output = Self;
+    fn div(self, rhs: T) -> Self {
+        SampleRate(self.0 / rhs)
+    }
+}
+
+/// The desired number of frames for the hardware buffer.
+pub type FrameCount = u32;
+
+/// The buffer size used by the device.
+///
+/// [`Default`] is used when no specific buffer size is set and uses the default
+/// behavior of the given host. Note, the default buffer size may be surprisingly
+/// large, leading to latency issues. If low latency is desired, [`Fixed(FrameCount)`]
+/// should be used in accordance with the [`SupportedBufferSize`] range produced by
+/// the [`SupportedStreamConfig`] API.  
+///
+/// [`Default`]: BufferSize::Default
+/// [`Fixed(FrameCount)`]: BufferSize::Fixed
+/// [`SupportedStreamConfig`]: SupportedStreamConfig::buffer_size
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum BufferSize {
+    Default,
+    Fixed(FrameCount),
+}
+
+#[cfg(target_os = "emscripten")]
+impl wasm_bindgen::describe::WasmDescribe for BufferSize {
+    fn describe() {}
+}
+
+#[cfg(target_os = "emscripten")]
+impl wasm_bindgen::convert::IntoWasmAbi for BufferSize {
+    type Abi = Option<u32>;
+    fn into_abi(self) -> Self::Abi {
+        match self {
+            Self::Default => None,
+            Self::Fixed(fc) => Some(fc),
+        }
+        .into_abi()
+    }
+}
+
+/// The set of parameters used to describe how to open a stream.
+///
+/// The sample format is omitted in favour of using a sample type.
+#[cfg_attr(target_os = "emscripten", wasm_bindgen)]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct StreamConfig {
+    pub channels: ChannelCount,
+    pub sample_rate: SampleRate,
+    pub buffer_size: BufferSize,
+}
+
+/// Describes the minimum and maximum supported buffer size for the device
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum SupportedBufferSize {
+    Range {
+        min: FrameCount,
+        max: FrameCount,
+    },
+    /// In the case that the platform provides no way of getting the default
+    /// buffersize before starting a stream.
+    Unknown,
+}
+
+/// Describes a range of supported stream configurations, retrieved via the
+/// [`Device::supported_input/output_configs`](traits::DeviceTrait#required-methods) method.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct SupportedStreamConfigRange {
+    pub(crate) channels: ChannelCount,
+    /// Minimum value for the samples rate of the supported formats.
+    pub(crate) min_sample_rate: SampleRate,
+    /// Maximum value for the samples rate of the supported formats.
+    pub(crate) max_sample_rate: SampleRate,
+    /// Buffersize ranges supported by the device
+    pub(crate) buffer_size: SupportedBufferSize,
+    /// Type of data expected by the device.
+    pub(crate) sample_format: SampleFormat,
+}
+
+/// Describes a single supported stream configuration, retrieved via either a
+/// [`SupportedStreamConfigRange`] instance or one of the
+/// [`Device::default_input/output_config`](traits::DeviceTrait#required-methods) methods.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct SupportedStreamConfig {
+    channels: ChannelCount,
+    sample_rate: SampleRate,
+    buffer_size: SupportedBufferSize,
+    sample_format: SampleFormat,
+}
+
+/// A buffer of dynamically typed audio data, passed to raw stream callbacks.
+///
+/// Raw input stream callbacks receive `&Data`, while raw output stream callbacks expect `&mut
+/// Data`.
+#[cfg_attr(target_os = "emscripten", wasm_bindgen)]
+#[derive(Debug)]
+pub struct Data {
+    data: *mut (),
+    len: usize,
+    sample_format: SampleFormat,
+}
+
+/// A monotonic time instance associated with a stream, retrieved from either:
+///
+/// 1. A timestamp provided to the stream's underlying audio data callback or
+/// 2. The same time source used to generate timestamps for a stream's underlying audio data
+///    callback.
+///
+/// `StreamInstant` represents a duration since some unspecified origin occurring either before
+/// or equal to the moment the stream from which it was created begins.
+///
+/// ## Host `StreamInstant` Sources
+///
+/// | Host | Source |
+/// | ---- | ------ |
+/// | alsa | `snd_pcm_status_get_htstamp` |
+/// | coreaudio | `mach_absolute_time` |
+/// | wasapi | `QueryPerformanceCounter` |
+/// | asio | `timeGetTime` |
+/// | emscripten | `AudioContext.getOutputTimestamp` |
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
+pub struct StreamInstant {
+    secs: i64,
+    nanos: u32,
+}
+
+/// A timestamp associated with a call to an input stream's data callback.
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
+pub struct InputStreamTimestamp {
+    /// The instant the stream's data callback was invoked.
+    pub callback: StreamInstant,
+    /// The instant that data was captured from the device.
+    ///
+    /// E.g. The instant data was read from an ADC.
+    pub capture: StreamInstant,
+}
+
+/// A timestamp associated with a call to an output stream's data callback.
+#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
+pub struct OutputStreamTimestamp {
+    /// The instant the stream's data callback was invoked.
+    pub callback: StreamInstant,
+    /// The predicted instant that data written will be delivered to the device for playback.
+    ///
+    /// E.g. The instant data will be played by a DAC.
+    pub playback: StreamInstant,
+}
+
+/// Information relevant to a single call to the user's input stream data callback.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct InputCallbackInfo {
+    timestamp: InputStreamTimestamp,
+}
+
+/// Information relevant to a single call to the user's output stream data callback.
+#[cfg_attr(target_os = "emscripten", wasm_bindgen)]
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct OutputCallbackInfo {
+    timestamp: OutputStreamTimestamp,
+}
+
+impl SupportedStreamConfig {
+    pub fn new(
+        channels: ChannelCount,
+        sample_rate: SampleRate,
+        buffer_size: SupportedBufferSize,
+        sample_format: SampleFormat,
+    ) -> Self {
+        Self {
+            channels,
+            sample_rate,
+            buffer_size,
+            sample_format,
+        }
+    }
+
+    pub fn channels(&self) -> ChannelCount {
+        self.channels
+    }
+
+    pub fn sample_rate(&self) -> SampleRate {
+        self.sample_rate
+    }
+
+    pub fn buffer_size(&self) -> &SupportedBufferSize {
+        &self.buffer_size
+    }
+
+    pub fn sample_format(&self) -> SampleFormat {
+        self.sample_format
+    }
+
+    pub fn config(&self) -> StreamConfig {
+        StreamConfig {
+            channels: self.channels,
+            sample_rate: self.sample_rate,
+            buffer_size: BufferSize::Default,
+        }
+    }
+}
+
+impl StreamInstant {
+    /// The amount of time elapsed from another instant to this one.
+    ///
+    /// Returns `None` if `earlier` is later than self.
+    pub fn duration_since(&self, earlier: &Self) -> Option<Duration> {
+        if self < earlier {
+            None
+        } else {
+            (self.as_nanos() - earlier.as_nanos())
+                .try_into()
+                .ok()
+                .map(Duration::from_nanos)
+        }
+    }
+
+    /// Returns the instant in time after the given duration has passed.
+    ///
+    /// Returns `None` if the resulting instant would exceed the bounds of the underlying data
+    /// structure.
+    pub fn add(&self, duration: Duration) -> Option<Self> {
+        self.as_nanos()
+            .checked_add(duration.as_nanos() as i128)
+            .and_then(Self::from_nanos_i128)
+    }
+
+    /// Returns the instant in time one `duration` ago.
+    ///
+    /// Returns `None` if the resulting instant would underflow. As a result, it is important to
+    /// consider that on some platforms the [`StreamInstant`] may begin at `0` from the moment the
+    /// source stream is created.
+    pub fn sub(&self, duration: Duration) -> Option<Self> {
+        self.as_nanos()
+            .checked_sub(duration.as_nanos() as i128)
+            .and_then(Self::from_nanos_i128)
+    }
+
+    fn as_nanos(&self) -> i128 {
+        (self.secs as i128 * 1_000_000_000) + self.nanos as i128
+    }
+
+    #[allow(dead_code)]
+    fn from_nanos(nanos: i64) -> Self {
+        let secs = nanos / 1_000_000_000;
+        let subsec_nanos = nanos - secs * 1_000_000_000;
+        Self::new(secs, subsec_nanos as u32)
+    }
+
+    #[allow(dead_code)]
+    fn from_nanos_i128(nanos: i128) -> Option<Self> {
+        let secs = nanos / 1_000_000_000;
+        if secs > i64::MAX as i128 || secs < i64::MIN as i128 {
+            None
+        } else {
+            let subsec_nanos = nanos - secs * 1_000_000_000;
+            debug_assert!(subsec_nanos < u32::MAX as i128);
+            Some(Self::new(secs as i64, subsec_nanos as u32))
+        }
+    }
+
+    #[allow(dead_code)]
+    fn from_secs_f64(secs: f64) -> crate::StreamInstant {
+        let s = secs.floor() as i64;
+        let ns = ((secs - s as f64) * 1_000_000_000.0) as u32;
+        Self::new(s, ns)
+    }
+
+    fn new(secs: i64, nanos: u32) -> Self {
+        StreamInstant { secs, nanos }
+    }
+}
+
+impl InputCallbackInfo {
+    /// The timestamp associated with the call to an input stream's data callback.
+    pub fn timestamp(&self) -> InputStreamTimestamp {
+        self.timestamp
+    }
+}
+
+impl OutputCallbackInfo {
+    /// The timestamp associated with the call to an output stream's data callback.
+    pub fn timestamp(&self) -> OutputStreamTimestamp {
+        self.timestamp
+    }
+}
+
+#[allow(clippy::len_without_is_empty)]
+impl Data {
+    // Internal constructor for host implementations to use.
+    //
+    // The following requirements must be met in order for the safety of `Data`'s public API.
+    //
+    // - The `data` pointer must point to the first sample in the slice containing all samples.
+    // - The `len` must describe the length of the buffer as a number of samples in the expected
+    //   format specified via the `sample_format` argument.
+    // - The `sample_format` must correctly represent the underlying sample data delivered/expected
+    //   by the stream.
+    pub(crate) unsafe fn from_parts(
+        data: *mut (),
+        len: usize,
+        sample_format: SampleFormat,
+    ) -> Self {
+        Data {
+            data,
+            len,
+            sample_format,
+        }
+    }
+
+    /// The sample format of the internal audio data.
+    pub fn sample_format(&self) -> SampleFormat {
+        self.sample_format
+    }
+
+    /// The full length of the buffer in samples.
+    ///
+    /// The returned length is the same length as the slice of type `T` that would be returned via
+    /// [`as_slice`](Self::as_slice) given a sample type that matches the inner sample format.
+    pub fn len(&self) -> usize {
+        self.len
+    }
+
+    /// The raw slice of memory representing the underlying audio data as a slice of bytes.
+    ///
+    /// It is up to the user to interpret the slice of memory based on [`Data::sample_format`].
+    pub fn bytes(&self) -> &[u8] {
+        let len = self.len * self.sample_format.sample_size();
+        // The safety of this block relies on correct construction of the `Data` instance.
+        // See the unsafe `from_parts` constructor for these requirements.
+        unsafe { std::slice::from_raw_parts(self.data as *const u8, len) }
+    }
+
+    /// The raw slice of memory representing the underlying audio data as a slice of bytes.
+    ///
+    /// It is up to the user to interpret the slice of memory based on [`Data::sample_format`].
+    pub fn bytes_mut(&mut self) -> &mut [u8] {
+        let len = self.len * self.sample_format.sample_size();
+        // The safety of this block relies on correct construction of the `Data` instance. See
+        // the unsafe `from_parts` constructor for these requirements.
+        unsafe { std::slice::from_raw_parts_mut(self.data as *mut u8, len) }
+    }
+
+    /// Access the data as a slice of sample type `T`.
+    ///
+    /// Returns `None` if the sample type does not match the expected sample format.
+    pub fn as_slice<T>(&self) -> Option<&[T]>
+    where
+        T: SizedSample,
+    {
+        if T::FORMAT == self.sample_format {
+            // The safety of this block relies on correct construction of the `Data` instance. See
+            // the unsafe `from_parts` constructor for these requirements.
+            unsafe { Some(std::slice::from_raw_parts(self.data as *const T, self.len)) }
+        } else {
+            None
+        }
+    }
+
+    /// Access the data as a slice of sample type `T`.
+    ///
+    /// Returns `None` if the sample type does not match the expected sample format.
+    pub fn as_slice_mut<T>(&mut self) -> Option<&mut [T]>
+    where
+        T: SizedSample,
+    {
+        if T::FORMAT == self.sample_format {
+            // The safety of this block relies on correct construction of the `Data` instance. See
+            // the unsafe `from_parts` constructor for these requirements.
+            unsafe {
+                Some(std::slice::from_raw_parts_mut(
+                    self.data as *mut T,
+                    self.len,
+                ))
+            }
+        } else {
+            None
+        }
+    }
+}
+
+impl SupportedStreamConfigRange {
+    pub fn new(
+        channels: ChannelCount,
+        min_sample_rate: SampleRate,
+        max_sample_rate: SampleRate,
+        buffer_size: SupportedBufferSize,
+        sample_format: SampleFormat,
+    ) -> Self {
+        Self {
+            channels,
+            min_sample_rate,
+            max_sample_rate,
+            buffer_size,
+            sample_format,
+        }
+    }
+
+    pub fn channels(&self) -> ChannelCount {
+        self.channels
+    }
+
+    pub fn min_sample_rate(&self) -> SampleRate {
+        self.min_sample_rate
+    }
+
+    pub fn max_sample_rate(&self) -> SampleRate {
+        self.max_sample_rate
+    }
+
+    pub fn buffer_size(&self) -> &SupportedBufferSize {
+        &self.buffer_size
+    }
+
+    pub fn sample_format(&self) -> SampleFormat {
+        self.sample_format
+    }
+
+    /// Retrieve a [`SupportedStreamConfig`] with the given sample rate and buffer size.
+    ///
+    /// # Panics
+    ///
+    /// Panics if the given `sample_rate` is outside the range specified within
+    /// this [`SupportedStreamConfigRange`] instance. For a non-panicking
+    /// variant, use [`try_with_sample_rate`](#method.try_with_sample_rate).
+    pub fn with_sample_rate(self, sample_rate: SampleRate) -> SupportedStreamConfig {
+        self.try_with_sample_rate(sample_rate)
+            .expect("sample rate out of range")
+    }
+
+    /// Retrieve a [`SupportedStreamConfig`] with the given sample rate and buffer size.
+    ///
+    /// Returns `None` if the given sample rate is outside the range specified
+    /// within this [`SupportedStreamConfigRange`] instance.
+    pub fn try_with_sample_rate(self, sample_rate: SampleRate) -> Option<SupportedStreamConfig> {
+        if self.min_sample_rate <= sample_rate && sample_rate <= self.max_sample_rate {
+            Some(SupportedStreamConfig {
+                channels: self.channels,
+                sample_rate,
+                sample_format: self.sample_format,
+                buffer_size: self.buffer_size,
+            })
+        } else {
+            None
+        }
+    }
+
+    /// Turns this [`SupportedStreamConfigRange`] into a [`SupportedStreamConfig`] corresponding to the maximum samples rate.
+    #[inline]
+    pub fn with_max_sample_rate(self) -> SupportedStreamConfig {
+        SupportedStreamConfig {
+            channels: self.channels,
+            sample_rate: self.max_sample_rate,
+            sample_format: self.sample_format,
+            buffer_size: self.buffer_size,
+        }
+    }
+
+    /// A comparison function which compares two [`SupportedStreamConfigRange`]s in terms of their priority of
+    /// use as a default stream format.
+    ///
+    /// Some backends do not provide a default stream format for their audio devices. In these
+    /// cases, CPAL attempts to decide on a reasonable default format for the user. To do this we
+    /// use the "greatest" of all supported stream formats when compared with this method.
+    ///
+    /// SupportedStreamConfigs are prioritised by the following heuristics:
+    ///
+    /// **Channels**:
+    ///
+    /// - Stereo
+    /// - Mono
+    /// - Max available channels
+    ///
+    /// **Sample format**:
+    /// - f32
+    /// - i16
+    /// - u16
+    ///
+    /// **Sample rate**:
+    ///
+    /// - 44100 (cd quality)
+    /// - Max sample rate
+    pub fn cmp_default_heuristics(&self, other: &Self) -> std::cmp::Ordering {
+        use std::cmp::Ordering::Equal;
+        use SampleFormat::{F32, I16, U16};
+
+        let cmp_stereo = (self.channels == 2).cmp(&(other.channels == 2));
+        if cmp_stereo != Equal {
+            return cmp_stereo;
+        }
+
+        let cmp_mono = (self.channels == 1).cmp(&(other.channels == 1));
+        if cmp_mono != Equal {
+            return cmp_mono;
+        }
+
+        let cmp_channels = self.channels.cmp(&other.channels);
+        if cmp_channels != Equal {
+            return cmp_channels;
+        }
+
+        let cmp_f32 = (self.sample_format == F32).cmp(&(other.sample_format == F32));
+        if cmp_f32 != Equal {
+            return cmp_f32;
+        }
+
+        let cmp_i16 = (self.sample_format == I16).cmp(&(other.sample_format == I16));
+        if cmp_i16 != Equal {
+            return cmp_i16;
+        }
+
+        let cmp_u16 = (self.sample_format == U16).cmp(&(other.sample_format == U16));
+        if cmp_u16 != Equal {
+            return cmp_u16;
+        }
+
+        const HZ_44100: SampleRate = SampleRate(44_100);
+        let r44100_in_self = self.min_sample_rate <= HZ_44100 && HZ_44100 <= self.max_sample_rate;
+        let r44100_in_other =
+            other.min_sample_rate <= HZ_44100 && HZ_44100 <= other.max_sample_rate;
+        let cmp_r44100 = r44100_in_self.cmp(&r44100_in_other);
+        if cmp_r44100 != Equal {
+            return cmp_r44100;
+        }
+
+        self.max_sample_rate.cmp(&other.max_sample_rate)
+    }
+}
+
+#[test]
+fn test_cmp_default_heuristics() {
+    let mut formats = [
+        SupportedStreamConfigRange {
+            buffer_size: SupportedBufferSize::Range { min: 256, max: 512 },
+            channels: 2,
+            min_sample_rate: SampleRate(1),
+            max_sample_rate: SampleRate(96000),
+            sample_format: SampleFormat::F32,
+        },
+        SupportedStreamConfigRange {
+            buffer_size: SupportedBufferSize::Range { min: 256, max: 512 },
+            channels: 1,
+            min_sample_rate: SampleRate(1),
+            max_sample_rate: SampleRate(96000),
+            sample_format: SampleFormat::F32,
+        },
+        SupportedStreamConfigRange {
+            buffer_size: SupportedBufferSize::Range { min: 256, max: 512 },
+            channels: 2,
+            min_sample_rate: SampleRate(1),
+            max_sample_rate: SampleRate(96000),
+            sample_format: SampleFormat::I16,
+        },
+        SupportedStreamConfigRange {
+            buffer_size: SupportedBufferSize::Range { min: 256, max: 512 },
+            channels: 2,
+            min_sample_rate: SampleRate(1),
+            max_sample_rate: SampleRate(96000),
+            sample_format: SampleFormat::U16,
+        },
+        SupportedStreamConfigRange {
+            buffer_size: SupportedBufferSize::Range { min: 256, max: 512 },
+            channels: 2,
+            min_sample_rate: SampleRate(1),
+            max_sample_rate: SampleRate(22050),
+            sample_format: SampleFormat::F32,
+        },
+    ];
+
+    formats.sort_by(|a, b| a.cmp_default_heuristics(b));
+
+    // lowest-priority first:
+    assert_eq!(formats[0].sample_format(), SampleFormat::F32);
+    assert_eq!(formats[0].min_sample_rate(), SampleRate(1));
+    assert_eq!(formats[0].max_sample_rate(), SampleRate(96000));
+    assert_eq!(formats[0].channels(), 1);
+
+    assert_eq!(formats[1].sample_format(), SampleFormat::U16);
+    assert_eq!(formats[1].min_sample_rate(), SampleRate(1));
+    assert_eq!(formats[1].max_sample_rate(), SampleRate(96000));
+    assert_eq!(formats[1].channels(), 2);
+
+    assert_eq!(formats[2].sample_format(), SampleFormat::I16);
+    assert_eq!(formats[2].min_sample_rate(), SampleRate(1));
+    assert_eq!(formats[2].max_sample_rate(), SampleRate(96000));
+    assert_eq!(formats[2].channels(), 2);
+
+    assert_eq!(formats[3].sample_format(), SampleFormat::F32);
+    assert_eq!(formats[3].min_sample_rate(), SampleRate(1));
+    assert_eq!(formats[3].max_sample_rate(), SampleRate(22050));
+    assert_eq!(formats[3].channels(), 2);
+
+    assert_eq!(formats[4].sample_format(), SampleFormat::F32);
+    assert_eq!(formats[4].min_sample_rate(), SampleRate(1));
+    assert_eq!(formats[4].max_sample_rate(), SampleRate(96000));
+    assert_eq!(formats[4].channels(), 2);
+}
+
+impl From<SupportedStreamConfig> for StreamConfig {
+    fn from(conf: SupportedStreamConfig) -> Self {
+        conf.config()
+    }
+}
+
+// If a backend does not provide an API for retrieving supported formats, we query it with a bunch
+// of commonly used rates. This is always the case for wasapi and is sometimes the case for alsa.
+//
+// If a rate you desire is missing from this list, feel free to add it!
+#[cfg(target_os = "windows")]
+const COMMON_SAMPLE_RATES: &[SampleRate] = &[
+    SampleRate(5512),
+    SampleRate(8000),
+    SampleRate(11025),
+    SampleRate(16000),
+    SampleRate(22050),
+    SampleRate(32000),
+    SampleRate(44100),
+    SampleRate(48000),
+    SampleRate(64000),
+    SampleRate(88200),
+    SampleRate(96000),
+    SampleRate(176400),
+    SampleRate(192000),
+];
+
+#[test]
+fn test_stream_instant() {
+    let a = StreamInstant::new(2, 0);
+    let b = StreamInstant::new(-2, 0);
+    let min = StreamInstant::new(i64::MIN, 0);
+    let max = StreamInstant::new(i64::MAX, 0);
+    assert_eq!(
+        a.sub(Duration::from_secs(1)),
+        Some(StreamInstant::new(1, 0))
+    );
+    assert_eq!(
+        a.sub(Duration::from_secs(2)),
+        Some(StreamInstant::new(0, 0))
+    );
+    assert_eq!(
+        a.sub(Duration::from_secs(3)),
+        Some(StreamInstant::new(-1, 0))
+    );
+    assert_eq!(min.sub(Duration::from_secs(1)), None);
+    assert_eq!(
+        b.add(Duration::from_secs(1)),
+        Some(StreamInstant::new(-1, 0))
+    );
+    assert_eq!(
+        b.add(Duration::from_secs(2)),
+        Some(StreamInstant::new(0, 0))
+    );
+    assert_eq!(
+        b.add(Duration::from_secs(3)),
+        Some(StreamInstant::new(1, 0))
+    );
+    assert_eq!(max.add(Duration::from_secs(1)), None);
+}

src-tauri/patches/cpal-0.15.3/src/platform/mod.rs

@@ -0,0 +1,742 @@
+//! Platform-specific items.
+//!
+//! This module also contains the implementation of the platform's dynamically dispatched [`Host`]
+//! type and its associated [`Device`], [`Stream`] and other associated types. These
+//! types are useful in the case that users require switching between audio host APIs at runtime.
+
+#[doc(inline)]
+pub use self::platform_impl::*;
+
+/// A macro to assist with implementing a platform's dynamically dispatched [`Host`] type.
+///
+/// These dynamically dispatched types are necessary to allow for users to switch between hosts at
+/// runtime.
+///
+/// For example the invocation `impl_platform_host(Wasapi wasapi "WASAPI", Asio asio "ASIO")`,
+/// this macro should expand to:
+///
+// This sample code block is marked as text because it's not a valid test,
+// it's just illustrative. (see rust issue #96573)
+/// ```text
+/// pub enum HostId {
+///     Wasapi,
+///     Asio,
+/// }
+///
+/// pub enum Host {
+///     Wasapi(crate::host::wasapi::Host),
+///     Asio(crate::host::asio::Host),
+/// }
+/// ```
+///
+/// And so on for Device, Devices, Host, Stream, SupportedInputConfigs,
+/// SupportedOutputConfigs and all their necessary trait implementations.
+///
+macro_rules! impl_platform_host {
+    ($($(#[cfg($feat: meta)])? $HostVariant:ident $host_mod:ident $host_name:literal),*) => {
+        /// All hosts supported by CPAL on this platform.
+        pub const ALL_HOSTS: &'static [HostId] = &[
+            $(
+                $(#[cfg($feat)])?
+                HostId::$HostVariant,
+            )*
+        ];
+
+        /// The platform's dynamically dispatched `Host` type.
+        ///
+        /// An instance of this `Host` type may represent one of the `Host`s available
+        /// on the platform.
+        ///
+        /// Use this type if you require switching between available hosts at runtime.
+        ///
+        /// This type may be constructed via the [`host_from_id`] function. [`HostId`]s may
+        /// be acquired via the [`ALL_HOSTS`] const, and the [`available_hosts`] function.
+        pub struct Host(HostInner);
+
+        /// The `Device` implementation associated with the platform's dynamically dispatched
+        /// [`Host`] type.
+        #[derive(Clone)]
+        pub struct Device(DeviceInner);
+
+        /// The `Devices` iterator associated with the platform's dynamically dispatched [`Host`]
+        /// type.
+        pub struct Devices(DevicesInner);
+
+        /// The `Stream` implementation associated with the platform's dynamically dispatched
+        /// [`Host`] type.
+        // Streams cannot be `Send` or `Sync` if we plan to support Android's AAudio API. This is
+        // because the stream API is not thread-safe, and the API prohibits calling certain
+        // functions within the callback.
+        //
+        // TODO: Confirm this and add more specific detail and references.
+        #[must_use = "If the stream is not stored it will not play."]
+        pub struct Stream(StreamInner, crate::platform::NotSendSyncAcrossAllPlatforms);
+
+        /// The `SupportedInputConfigs` iterator associated with the platform's dynamically
+        /// dispatched [`Host`] type.
+        pub struct SupportedInputConfigs(SupportedInputConfigsInner);
+
+        /// The `SupportedOutputConfigs` iterator associated with the platform's dynamically
+        /// dispatched [`Host`] type.
+        pub struct SupportedOutputConfigs(SupportedOutputConfigsInner);
+
+        /// Unique identifier for available hosts on the platform.
+        #[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
+        pub enum HostId {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant,
+            )*
+        }
+
+        /// Contains a platform specific [`Device`] implementation.
+        #[derive(Clone)]
+        pub enum DeviceInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::Device),
+            )*
+        }
+
+        /// Contains a platform specific [`Devices`] implementation.
+        pub enum DevicesInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::Devices),
+            )*
+        }
+
+        /// Contains a platform specific [`Host`] implementation.
+        pub enum HostInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::Host),
+            )*
+        }
+
+        /// Contains a platform specific [`Stream`] implementation.
+        pub enum StreamInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::Stream),
+            )*
+        }
+
+        enum SupportedInputConfigsInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::SupportedInputConfigs),
+            )*
+        }
+
+        enum SupportedOutputConfigsInner {
+            $(
+                $(#[cfg($feat)])?
+                $HostVariant(crate::host::$host_mod::SupportedOutputConfigs),
+            )*
+        }
+
+        impl HostId {
+            pub fn name(&self) -> &'static str {
+                match self {
+                    $(
+                        $(#[cfg($feat)])?
+                        HostId::$HostVariant => $host_name,
+                    )*
+                }
+            }
+        }
+
+        impl Devices {
+            /// Returns a reference to the underlying platform specific implementation of this
+            /// `Devices`.
+            pub fn as_inner(&self) -> &DevicesInner {
+                &self.0
+            }
+
+            /// Returns a mutable reference to the underlying platform specific implementation of
+            /// this `Devices`.
+            pub fn as_inner_mut(&mut self) -> &mut DevicesInner {
+                &mut self.0
+            }
+
+            /// Returns the underlying platform specific implementation of this `Devices`.
+            pub fn into_inner(self) -> DevicesInner {
+                self.0
+            }
+        }
+
+        impl Device {
+            /// Returns a reference to the underlying platform specific implementation of this
+            /// `Device`.
+            pub fn as_inner(&self) -> &DeviceInner {
+                &self.0
+            }
+
+            /// Returns a mutable reference to the underlying platform specific implementation of
+            /// this `Device`.
+            pub fn as_inner_mut(&mut self) -> &mut DeviceInner {
+                &mut self.0
+            }
+
+            /// Returns the underlying platform specific implementation of this `Device`.
+            pub fn into_inner(self) -> DeviceInner {
+                self.0
+            }
+        }
+
+        impl Host {
+            /// The unique identifier associated with this `Host`.
+            pub fn id(&self) -> HostId {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        HostInner::$HostVariant(_) => HostId::$HostVariant,
+                    )*
+                }
+            }
+
+            /// Returns a reference to the underlying platform specific implementation of this
+            /// `Host`.
+            pub fn as_inner(&self) -> &HostInner {
+                &self.0
+            }
+
+            /// Returns a mutable reference to the underlying platform specific implementation of
+            /// this `Host`.
+            pub fn as_inner_mut(&mut self) -> &mut HostInner {
+                &mut self.0
+            }
+
+            /// Returns the underlying platform specific implementation of this `Host`.
+            pub fn into_inner(self) -> HostInner {
+                self.0
+            }
+        }
+
+        impl Stream {
+            /// Returns a reference to the underlying platform specific implementation of this
+            /// `Stream`.
+            pub fn as_inner(&self) -> &StreamInner {
+                &self.0
+            }
+
+            /// Returns a mutable reference to the underlying platform specific implementation of
+            /// this `Stream`.
+            pub fn as_inner_mut(&mut self) -> &mut StreamInner {
+                &mut self.0
+            }
+
+            /// Returns the underlying platform specific implementation of this `Stream`.
+            pub fn into_inner(self) -> StreamInner {
+                self.0
+            }
+        }
+
+        impl Iterator for Devices {
+            type Item = Device;
+
+            fn next(&mut self) -> Option<Self::Item> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DevicesInner::$HostVariant(ref mut d) => {
+                            d.next().map(DeviceInner::$HostVariant).map(Device::from)
+                        }
+                    )*
+                }
+            }
+
+            fn size_hint(&self) -> (usize, Option<usize>) {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DevicesInner::$HostVariant(ref d) => d.size_hint(),
+                    )*
+                }
+            }
+        }
+
+        impl Iterator for SupportedInputConfigs {
+            type Item = crate::SupportedStreamConfigRange;
+
+            fn next(&mut self) -> Option<Self::Item> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        SupportedInputConfigsInner::$HostVariant(ref mut s) => s.next(),
+                    )*
+                }
+            }
+
+            fn size_hint(&self) -> (usize, Option<usize>) {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        SupportedInputConfigsInner::$HostVariant(ref d) => d.size_hint(),
+                    )*
+                }
+            }
+        }
+
+        impl Iterator for SupportedOutputConfigs {
+            type Item = crate::SupportedStreamConfigRange;
+
+            fn next(&mut self) -> Option<Self::Item> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        SupportedOutputConfigsInner::$HostVariant(ref mut s) => s.next(),
+                    )*
+                }
+            }
+
+            fn size_hint(&self) -> (usize, Option<usize>) {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        SupportedOutputConfigsInner::$HostVariant(ref d) => d.size_hint(),
+                    )*
+                }
+            }
+        }
+
+        impl crate::traits::DeviceTrait for Device {
+            type SupportedInputConfigs = SupportedInputConfigs;
+            type SupportedOutputConfigs = SupportedOutputConfigs;
+            type Stream = Stream;
+
+            fn name(&self) -> Result<String, crate::DeviceNameError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => d.name(),
+                    )*
+                }
+            }
+
+            fn supported_input_configs(&self) -> Result<Self::SupportedInputConfigs, crate::SupportedStreamConfigsError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => {
+                            d.supported_input_configs()
+                                .map(SupportedInputConfigsInner::$HostVariant)
+                                .map(SupportedInputConfigs)
+                        }
+                    )*
+                }
+            }
+
+            fn supported_output_configs(&self) -> Result<Self::SupportedOutputConfigs, crate::SupportedStreamConfigsError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => {
+                            d.supported_output_configs()
+                                .map(SupportedOutputConfigsInner::$HostVariant)
+                                .map(SupportedOutputConfigs)
+                        }
+                    )*
+                }
+            }
+
+            fn default_input_config(&self) -> Result<crate::SupportedStreamConfig, crate::DefaultStreamConfigError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => d.default_input_config(),
+                    )*
+                }
+            }
+
+            fn default_output_config(&self) -> Result<crate::SupportedStreamConfig, crate::DefaultStreamConfigError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => d.default_output_config(),
+                    )*
+                }
+            }
+
+            fn build_input_stream_raw<D, E>(
+                &self,
+                config: &crate::StreamConfig,
+                sample_format: crate::SampleFormat,
+                data_callback: D,
+                error_callback: E,
+                timeout: Option<std::time::Duration>,
+            ) -> Result<Self::Stream, crate::BuildStreamError>
+            where
+                D: FnMut(&crate::Data, &crate::InputCallbackInfo) + Send + 'static,
+                E: FnMut(crate::StreamError) + Send + 'static,
+            {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => d
+                            .build_input_stream_raw(
+                                config,
+                                sample_format,
+                                data_callback,
+                                error_callback,
+                                timeout,
+                            )
+                            .map(StreamInner::$HostVariant)
+                            .map(Stream::from),
+                    )*
+                }
+            }
+
+            fn build_output_stream_raw<D, E>(
+                &self,
+                config: &crate::StreamConfig,
+                sample_format: crate::SampleFormat,
+                data_callback: D,
+                error_callback: E,
+                timeout: Option<std::time::Duration>,
+            ) -> Result<Self::Stream, crate::BuildStreamError>
+            where
+                D: FnMut(&mut crate::Data, &crate::OutputCallbackInfo) + Send + 'static,
+                E: FnMut(crate::StreamError) + Send + 'static,
+            {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        DeviceInner::$HostVariant(ref d) => d
+                            .build_output_stream_raw(
+                                config,
+                                sample_format,
+                                data_callback,
+                                error_callback,
+                                timeout,
+                            )
+                            .map(StreamInner::$HostVariant)
+                            .map(Stream::from),
+                    )*
+                }
+            }
+        }
+
+        impl crate::traits::HostTrait for Host {
+            type Devices = Devices;
+            type Device = Device;
+
+            fn is_available() -> bool {
+                $(
+                    $(#[cfg($feat)])?
+                    if crate::host::$host_mod::Host::is_available() { return true; }
+                )*
+                false
+            }
+
+            fn devices(&self) -> Result<Self::Devices, crate::DevicesError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        HostInner::$HostVariant(ref h) => {
+                            h.devices().map(DevicesInner::$HostVariant).map(Devices::from)
+                        }
+                    )*
+                }
+            }
+
+            fn default_input_device(&self) -> Option<Self::Device> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        HostInner::$HostVariant(ref h) => {
+                            h.default_input_device().map(DeviceInner::$HostVariant).map(Device::from)
+                        }
+                    )*
+                }
+            }
+
+            fn default_output_device(&self) -> Option<Self::Device> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        HostInner::$HostVariant(ref h) => {
+                            h.default_output_device().map(DeviceInner::$HostVariant).map(Device::from)
+                        }
+                    )*
+                }
+            }
+        }
+
+        impl crate::traits::StreamTrait for Stream {
+            fn play(&self) -> Result<(), crate::PlayStreamError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        StreamInner::$HostVariant(ref s) => {
+                            s.play()
+                        }
+                    )*
+                }
+            }
+
+            fn pause(&self) -> Result<(), crate::PauseStreamError> {
+                match self.0 {
+                    $(
+                        $(#[cfg($feat)])?
+                        StreamInner::$HostVariant(ref s) => {
+                            s.pause()
+                        }
+                    )*
+                }
+            }
+        }
+
+        impl From<DeviceInner> for Device {
+            fn from(d: DeviceInner) -> Self {
+                Device(d)
+            }
+        }
+
+        impl From<DevicesInner> for Devices {
+            fn from(d: DevicesInner) -> Self {
+                Devices(d)
+            }
+        }
+
+        impl From<HostInner> for Host {
+            fn from(h: HostInner) -> Self {
+                Host(h)
+            }
+        }
+
+        impl From<StreamInner> for Stream {
+            fn from(s: StreamInner) -> Self {
+                Stream(s, Default::default())
+            }
+        }
+
+        $(
+            $(#[cfg($feat)])?
+            impl From<crate::host::$host_mod::Device> for Device {
+                fn from(h: crate::host::$host_mod::Device) -> Self {
+                    DeviceInner::$HostVariant(h).into()
+                }
+            }
+
+            $(#[cfg($feat)])?
+            impl From<crate::host::$host_mod::Devices> for Devices {
+                fn from(h: crate::host::$host_mod::Devices) -> Self {
+                    DevicesInner::$HostVariant(h).into()
+                }
+            }
+
+            $(#[cfg($feat)])?
+            impl From<crate::host::$host_mod::Host> for Host {
+                fn from(h: crate::host::$host_mod::Host) -> Self {
+                    HostInner::$HostVariant(h).into()
+                }
+            }
+
+            $(#[cfg($feat)])?
+            impl From<crate::host::$host_mod::Stream> for Stream {
+                fn from(h: crate::host::$host_mod::Stream) -> Self {
+                    StreamInner::$HostVariant(h).into()
+                }
+            }
+        )*
+
+        /// Produces a list of hosts that are currently available on the system.
+        pub fn available_hosts() -> Vec<HostId> {
+            let mut host_ids = vec![];
+            $(
+                $(#[cfg($feat)])?
+                if <crate::host::$host_mod::Host as crate::traits::HostTrait>::is_available() {
+                    host_ids.push(HostId::$HostVariant);
+                }
+            )*
+            host_ids
+        }
+
+        /// Given a unique host identifier, initialise and produce the host if it is available.
+        pub fn host_from_id(id: HostId) -> Result<Host, crate::HostUnavailable> {
+            match id {
+                $(
+                    $(#[cfg($feat)])?
+                    HostId::$HostVariant => {
+                        crate::host::$host_mod::Host::new()
+                            .map(HostInner::$HostVariant)
+                            .map(Host::from)
+                    }
+                )*
+            }
+        }
+    };
+}
+
+// TODO: Add pulseaudio and jack here eventually.
+#[cfg(any(
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd"
+))]
+mod platform_impl {
+    pub use crate::host::alsa::{
+        Device as AlsaDevice, Devices as AlsaDevices, Host as AlsaHost, Stream as AlsaStream,
+        SupportedInputConfigs as AlsaSupportedInputConfigs,
+        SupportedOutputConfigs as AlsaSupportedOutputConfigs,
+    };
+    #[cfg(feature = "jack")]
+    pub use crate::host::jack::{
+        Device as JackDevice, Devices as JackDevices, Host as JackHost, Stream as JackStream,
+        SupportedInputConfigs as JackSupportedInputConfigs,
+        SupportedOutputConfigs as JackSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(#[cfg(feature = "jack")] Jack jack "JACK", Alsa alsa "ALSA");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        AlsaHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(any(target_os = "macos", target_os = "ios"))]
+mod platform_impl {
+    pub use crate::host::coreaudio::{
+        Device as CoreAudioDevice, Devices as CoreAudioDevices, Host as CoreAudioHost,
+        Stream as CoreAudioStream, SupportedInputConfigs as CoreAudioSupportedInputConfigs,
+        SupportedOutputConfigs as CoreAudioSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(CoreAudio coreaudio "CoreAudio");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        CoreAudioHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(target_os = "emscripten")]
+mod platform_impl {
+    pub use crate::host::emscripten::{
+        Device as EmscriptenDevice, Devices as EmscriptenDevices, Host as EmscriptenHost,
+        Stream as EmscriptenStream, SupportedInputConfigs as EmscriptenSupportedInputConfigs,
+        SupportedOutputConfigs as EmscriptenSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(Emscripten emscripten "Emscripten");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        EmscriptenHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(all(target_arch = "wasm32", feature = "wasm-bindgen"))]
+mod platform_impl {
+    pub use crate::host::webaudio::{
+        Device as WebAudioDevice, Devices as WebAudioDevices, Host as WebAudioHost,
+        Stream as WebAudioStream, SupportedInputConfigs as WebAudioSupportedInputConfigs,
+        SupportedOutputConfigs as WebAudioSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(WebAudio webaudio "WebAudio");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        WebAudioHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(windows)]
+mod platform_impl {
+    #[cfg(feature = "asio")]
+    pub use crate::host::asio::{
+        Device as AsioDevice, Devices as AsioDevices, Host as AsioHost, Stream as AsioStream,
+        SupportedInputConfigs as AsioSupportedInputConfigs,
+        SupportedOutputConfigs as AsioSupportedOutputConfigs,
+    };
+    pub use crate::host::wasapi::{
+        Device as WasapiDevice, Devices as WasapiDevices, Host as WasapiHost,
+        Stream as WasapiStream, SupportedInputConfigs as WasapiSupportedInputConfigs,
+        SupportedOutputConfigs as WasapiSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(#[cfg(feature = "asio")] Asio asio "ASIO", Wasapi wasapi "WASAPI");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        WasapiHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(target_os = "android")]
+mod platform_impl {
+    pub use crate::host::oboe::{
+        Device as OboeDevice, Devices as OboeDevices, Host as OboeHost, Stream as OboeStream,
+        SupportedInputConfigs as OboeSupportedInputConfigs,
+        SupportedOutputConfigs as OboeSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(Oboe oboe "Oboe");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        OboeHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+#[cfg(not(any(
+    windows,
+    target_os = "linux",
+    target_os = "dragonfly",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "macos",
+    target_os = "ios",
+    target_os = "emscripten",
+    target_os = "android",
+    all(target_arch = "wasm32", feature = "wasm-bindgen"),
+)))]
+mod platform_impl {
+    pub use crate::host::null::{
+        Device as NullDevice, Devices as NullDevices, Host as NullHost,
+        SupportedInputConfigs as NullSupportedInputConfigs,
+        SupportedOutputConfigs as NullSupportedOutputConfigs,
+    };
+
+    impl_platform_host!(Null null "Null");
+
+    /// The default host for the current compilation target platform.
+    pub fn default_host() -> Host {
+        NullHost::new()
+            .expect("the default host should always be available")
+            .into()
+    }
+}
+
+// The following zero-sized types are for applying Send/Sync restrictions to ensure
+// consistent behaviour across different platforms. These verbosely named types are used
+// (rather than using the markers directly) in the hope of making the compile errors
+// slightly more helpful.
+//
+// TODO: Remove these in favour of using negative trait bounds if they stabilise.
+
+// A marker used to remove the `Send` and `Sync` traits.
+struct NotSendSyncAcrossAllPlatforms(std::marker::PhantomData<*mut ()>);
+
+impl Default for NotSendSyncAcrossAllPlatforms {
+    fn default() -> Self {
+        NotSendSyncAcrossAllPlatforms(std::marker::PhantomData)
+    }
+}