feat(audio): add Opus playback via symphonia-adapter-libopus

Wire a lazy CodecRegistry built with symphonia::default::register_enabled_codecs
plus symphonia_adapter_libopus::OpusDecoder for SizedDecoder and radio decoders.

Raise package rust-version to 1.89 to match the MSRV required by
symphonia-adapter-libopus.

src-tauri/Cargo.lock

@@ -619,6 +619,15 @@ dependencies = [
  "libloading 0.8.9",
 ]
 
+[[package]]
+name = "cmake"
+version = "0.1.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0f78a02292a74a88ac736019ab962ece0bc380e3f977bf72e376c5d78ff0678"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "cocoa"
 version = "0.24.1"
@@ -3078,6 +3087,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
+[[package]]
+name = "opusic-sys"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc3280fe5b6f97ac1a35a0ac003e2fb0b92f8e4bdf2b2057e1bf9b87acca5696"
+dependencies = [
+ "cmake",
+]
+
 [[package]]
 name = "ordered-stream"
 version = "0.2.0"
@@ -3581,6 +3599,7 @@ dependencies = [
  "serde_json",
  "souvlaki",
  "symphonia",
+ "symphonia-adapter-libopus",
  "tauri",
  "tauri-build",
  "tauri-plugin-dialog",
@@ -4739,6 +4758,17 @@ dependencies = [
  "symphonia-metadata",
 ]
 
+[[package]]
+name = "symphonia-adapter-libopus"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9d17450685dda0e87467eddf3e0f9c0b2a1707fc5c3234c111f70d46c6e4494"
+dependencies = [
+ "log",
+ "opusic-sys",
+ "symphonia-core",
+]
+
 [[package]]
 name = "symphonia-bundle-flac"
 version = "0.5.5"

src-tauri/Cargo.toml

@@ -7,7 +7,7 @@ license = ""
 repository = ""
 default-run = "psysonic"
 edition = "2021"
-rust-version = "1.77.2"
+rust-version = "1.89"
 
 [lib]
 name = "psysonic_lib"
@@ -46,6 +46,7 @@ url = "2"
 thread-priority = "1"
 lofty = "0.22"
 id3 = "1.16.4"
+symphonia-adapter-libopus = "0.2.7"
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"

src-tauri/src/audio.rs

@@ -1,5 +1,5 @@
 use std::io::{Cursor, Read, Seek, SeekFrom};
-use std::sync::{Arc, Mutex};
+use std::sync::{Arc, Mutex, OnceLock};
 use std::sync::atomic::{AtomicBool, AtomicU32, AtomicU64, Ordering};
 use std::time::{Duration, Instant};
 #[cfg(unix)]
@@ -13,7 +13,7 @@ use rodio::source::UniformSourceIterator;
 use serde::Serialize;
 use symphonia::core::{
     audio::{AudioBufferRef, SampleBuffer, SignalSpec},
-    codecs::{DecoderOptions, CODEC_TYPE_NULL},
+    codecs::{CodecRegistry, DecoderOptions, CODEC_TYPE_NULL},
     formats::{FormatOptions, FormatReader, SeekMode, SeekTo},
     io::{MediaSource, MediaSourceStream, MediaSourceStreamOptions},
     meta::MetadataOptions,
@@ -682,11 +682,22 @@ impl Drop for RadioLiveState {
 //   [features]
 //   fdk-aac = ["dep:symphonia-adapter-fdk-aac"]
 
+/// Symphonia’s default codec set for our enabled features, plus Opus via libopus.
+fn psysonic_codec_registry() -> &'static CodecRegistry {
+    static REGISTRY: OnceLock<CodecRegistry> = OnceLock::new();
+    REGISTRY.get_or_init(|| {
+        let mut registry = CodecRegistry::new();
+        symphonia::default::register_enabled_codecs(&mut registry);
+        registry.register_all::<symphonia_adapter_libopus::OpusDecoder>();
+        registry
+    })
+}
+
 fn try_make_radio_decoder(
     params: &symphonia::core::codecs::CodecParameters,
     opts: &DecoderOptions,
 ) -> Result<Box<dyn symphonia::core::codecs::Decoder>, symphonia::core::errors::Error> {
-    symphonia::default::get_codecs().make(params, opts)
+    psysonic_codec_registry().make(params, opts)
 }
 
 // ── Async HTTP Download Task ──────────────────────────────────────────────────
@@ -980,7 +991,7 @@ impl SizedDecoder {
             .zip(track.codec_params.n_frames)
             .map(|(base, frames)| base.calc_time(frames));
 
-        let mut decoder = symphonia::default::get_codecs()
+        let mut decoder = psysonic_codec_registry()
             .make(&track.codec_params, &DecoderOptions::default())
             .map_err(|e| {
                 eprintln!("[psysonic] codec init failed: {e}");