fix(audio): stop two pump freezes, and enable the alternative sources on macOS - #498
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`LocalPlayer` is the one rodio sink shared by Local Files, Subsonic, Internet Radio, YouTube and Qobuz, and its `open_sink()` bailed on macOS, so all five sources answered "No audio output for local playback". That bail was never a fix for an observed `LocalPlayer` crash: it has been there since the commit that introduced the player, inherited from issues LargeModGames#9/LargeModGames#20, which were librespot-playback's own `rodio-backend` on an older rodio (the lockfile still has both: librespot pulls rodio 0.21 / cpal 0.16, this player uses rodio 0.22 / cpal 0.17 and the rewritten `DeviceSinkBuilder` API). cpal already ran on macOS in every shipped build via `audio-viz-cpal`, and the macOS decoded-source media routing in `route_decoded_macos_event` was already written and unreachable. Measured on CoreAudio before removing the gate: the two `#[ignore]`d device tests (now un-gated, they were dead code on macOS) plus the live sink tests for radio, YouTube and Qobuz all play. The five Subsonic live failures are the public Navidrome demo server returning an empty first playlist, and reproduce unchanged on main. Native Spotify streaming is untouched and keeps `portaudio-backend`. The macOS release rows in cd.yml gain the five source features to match. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTSifDzSFpuSUyeBTJWUii
Unplugging the output device with a decoded source playing did not just go silent: it froze the app. No audio callback runs again afterwards, and rodio's `clear` and `try_seek` wait on that callback with no timeout (`sleep_until_end`, and the seek feedback channel). Those calls run straight from the serial IoEvent pump, so one that never returns takes every unrelated event behind it down too - which is why searching stopped working, not only playback. Losing the device has two shapes and only one is an error anybody reports. cpal notices the device being *removed* and says `DeviceNotAvailable`. It cannot notice the far more common case: the OS moving its **default output** elsewhere - headphones unplugged, AirPods back in their case - which leaves the stream bound to a device nobody is listening to. So `LocalPlayer` raises a flag from its own cpal error callback *and* remembers the device it opened, comparing that against the current default. A name that cannot be read on either side counts as "cannot tell", never as a change: mid-switch there is briefly no default at all, and tearing playback down for that would be worse than the silence being caught. The tick polls this every 250ms with one session live, so it costs one property query per tick. That callback is ours for a second reason: rodio's default one `eprintln!`s (its `tracing` feature is off here) straight into the TUI, the same corruption `log_on_drop(false)` already guards against. The four methods that would wait on the audio thread now refuse once the device is gone, and the waits themselves are bounded, because a detector that misses one day is a frozen app again. Not by a plain timeout: a dead device and a source stalled on the network are indistinguishable from the caller's side, and Qobuz alone allows its stream 60s, so cutting that short would break slow playback to fix a freeze. `bounded()` re-asks the device every 3s instead, gives up at once when it really went away, and only past a 90s ceiling - nothing identifiably wrong, still no answer - declares it lost anyway. A pump that never returns is worse than a track that never plays. Refusing only stops the hang, so the driver's tick recovers: it polls `device_lost()`, rebuilds the output on the new default device with `reopen()`, and restages the track there paused at its old position (replay + seek + pause, ordered by the serial pump) - what macOS itself does when AirPods come out, and the reason not to resume playing. The recovery runs before every advance block on purpose: a dead sink never drains, so `is_finished()` stays false and would otherwise be read as a still-playing track. Radio is torn down instead (a live stream has no position, and pausing its ring buffer stalls it), and the native queue slot lets the existing advance take the next item. Not a macOS-only bug - a USB DAC on Linux or Windows does the same - so the fix is in the shared engine, where all ~20 call sites route through. Four device tests cover it: the refusal, timeout-asserted on a worker thread because a regression deadlocks rather than fails; a default that moved reading as lost while an unreadable name does not; a wait giving up at its first check once the device is gone; and reopen returning a live, empty, paused sink at the previous volume. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTSifDzSFpuSUyeBTJWUii
…reeze the app Picking certain stations played nothing, reported nothing, and left the app unusable: audio already playing kept going while search and the transport controls went dead until restart. Tune-in ends by working out the stream's format, and rodio's symphonia does that by scanning for a start-of-stream marker it recognises. A live stream has no end to stop that scan. Its `AdtsReader` registers only the MPEG-4 ADTS marker `ff f1`, not MPEG-2's `ff f9` - which is what much European radio broadcasts - so the scan ran forever, on the serial pump, taking every unrelated request with it. Reproduced against Radio Bruno: the stream opens in under a second (`audio/aacp`, ICY name read) and `prepare_stream` never returns. `Probe::format` takes the mime hint as `_hint` and ignores it, so no content-type mapping can help here. Connect and header waits in this file were already capped for exactly this reason; the probe was the third such step and was not. It is now. Giving up has to stop the *download*, not the reader. The first attempt was a flag the reader checked before each read, and a stack sample showed why that is not enough: the probe parks *inside* `read`, waiting on stream-download for bytes that never come, so the flag is never reached. Cancelling the download marks the stream done and wakes every waiter, so the read returns, the probe hits end-of-stream, and the thread and its download are released together - the test process now exits in 13s where it used to hang at runtime shutdown. Stations in formats the bundled decoder cannot identify still will not play; they now fail in a second or two and leave the app working. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTSifDzSFpuSUyeBTJWUii
The seven legs are all `ubuntu-latest`, so nothing in CI compiles the `#[cfg(target_os = "macos")]` arms, the portaudio playback backend, `macos-media`, or `audio-viz-cpal`. That was survivable while macOS release binaries shipped no decoded sources; now that they do, a break in any of it reaches users with no gate in front of it. Check and clippy only, following `headless-streaming`: what risks breaking here is a target-gated arm or a feature that does not exist on macOS. The test suite is platform-independent logic the Linux legs already run, and the tests that would exercise the audio path are `#[ignore]`d because CI runners have no audio output, so a `test` job would buy nothing for the extra runner time. One job rather than two so the slow part - spinning up a macOS runner - happens once. Its feature list is cd.yml's macOS release row, the same way the `all-sources` leg tracks the Linux one, with the same `brew install openssl@3 portaudio` that release builds use. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTSifDzSFpuSUyeBTJWUii
Every other entry in the file cites its issue; these two could not until the reports existed. Refs LargeModGames#496, LargeModGames#497 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTSifDzSFpuSUyeBTJWUii
📝 WalkthroughWalkthroughThe change enables decoded music sources in macOS releases, adds macOS CI validation, recovers playback after output-device loss, bounds radio format probing, and updates documentation and release notes. ChangesAudio platform and recovery
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🔵 Low · up to The PR is mergeable with owner awareness: concurrent playback recovery can occasionally target a retired audio sink or miss cancellation, and native queue completion in free-source sessions may display an incorrect Spotify connection message. These are bounded playback and messaging issues rather than data or security failures. Sequence Diagram(s)sequenceDiagram
participant CpalCallback
participant LocalPlayer
participant DriverTick
participant PlaybackSession
CpalCallback->>LocalPlayer: set lost flag on DeviceNotAvailable
DriverTick->>LocalPlayer: device_lost()
DriverTick->>LocalPlayer: reopen()
LocalPlayer->>PlaybackSession: restage track and restore playback state
sequenceDiagram
participant RadioDispatch
participant StreamDownload
participant FormatProbe
participant RadioSession
RadioDispatch->>StreamDownload: open stream
RadioDispatch->>FormatProbe: prepare stream with PROBE_TIMEOUT
FormatProbe-->>RadioDispatch: timeout
RadioDispatch->>StreamDownload: invoke OpenedStream.cancel
RadioDispatch-->>RadioSession: report error without publishing a session
🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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Inline comments:
In @.github/workflows/cd.yml:
- Around line 44-49: Update the stale feature-matrix comment near the
audio_features configuration to reflect that the extra sources are now enabled
for both macOS targets as well as Linux and Windows; remove the outdated
instruction about enabling them on macOS later, without changing the workflow
rows.
In @.github/workflows/ci.yml:
- Around line 254-259: Update the Rust toolchain step using actions-rs/toolchain
so it uses dtolnay/rust-toolchain@stable instead, while preserving the clippy
component configuration and existing stable-toolchain behavior.
In `@CHANGELOG.md`:
- Line 15: Update the changelog entry heading to clearly state that a radio
station Spotatui cannot decode no longer freezes the app, while preserving the
existing explanation and issue reference.
In `@src/infra/audio/player.rs`:
- Around line 483-486: Update Driver::tick and LocalPlayer::reopen so device
reopening, including open_sink_or_fallback initialization and init_rx.recv,
never runs synchronously on the tick path; perform the complete reopen flow
asynchronously or apply explicit bounds to every initialization step while
preserving the existing error propagation.
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Thanks, the two freeze fixes are right in mechanism, and I verified them on Windows: clippy with the five sources is clean, the six ignored device tests pass on the real WASAPI output, and the new radio test gives up at 10.9 s against the live station. Five things in the recovery path to change before merge, inline below.
Five things from the PR review, plus the two workflow/CHANGELOG nits: - Recovery pauses only when cpal reported the device *removed* (`device_removed()`), or the session was already paused. A default output that merely moved means the user plugged something in, and the track now keeps playing there instead of ending on "paused here". - The radio probe timeout wraps `prepare_stream` only. `timeout` abandons a `spawn_blocking` closure but cannot stop it, and the radio player is shared, so a probe that matched after the deadline used to append the new station to the live sink. `play_prepared` runs after the timeout check. - `bounded()` captures the sink's `Player` and `lost` flag at entry and gives up as soon as `reopen` swapped a new sink in, so the ceiling can never be charged to the healthy sink. `play_file` re-checks the same identity across the decode before appending. - The queue slot settles its play/pause state *after* the advance block has dispatched (the fresh sink is empty, so the advance fires), and a failed reopen goes through `FinishNativeQueue` - the teardown a drained queue runs - instead of dropping `queue_now` and stranding the suspended context and the queued items. - `open_sink` waits on the init channel with a 5s timeout, which bounds `reopen` on the tick and `LocalPlayer::new` with it. Also: dtolnay/rust-toolchain in the macOS CI job (actions-rs is archived and runs on node12), the cd.yml feature-matrix comment, and the radio CHANGELOG heading. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RtsRHLmm5ppJowbRCnVnrx
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Inline comments:
In `@src/infra/network/mod.rs`:
- Around line 146-162: Update event_bypasses_spotify_auth to return true for
IoEvent::AdvanceNativeQueue and IoEvent::FinishNativeQueue, preserving the
existing auth-neutral fallback for these control events. Do not add either event
to the service lane.
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
echo '=== Commit summary and affected paths ==='
git show --stat --oneline --decorate --no-renames 246db13
git diff 246db13^ 246db13 -- \
src/core/driver/mod.rs \
src/infra/audio/player.rs \
src/infra/radio/dispatch.rs \
src/infra/radio/stream.rs \
src/infra/network/mod.rs \
src/infra/queue/dispatch.rs \
.github/workflows/ci.yml \
.github/workflows/cd.yml \
CHANGELOG.md \
tools/gates.count
echo '=== Source outlines ==='
ast-grep outline src/infra/audio/player.rs --items all --view expanded
ast-grep outline src/infra/radio/dispatch.rs --items all --view expanded
ast-grep outline src/core/driver/mod.rs --items all --view expanded
ast-grep outline src/infra/queue/dispatch.rs --items all --view expanded
echo '=== Targeted implementations and call sites ==='
rg -n -C 10 \
'\b(device_removed|device_lost|reopen|bounded|open_sink|play_file|prepare_stream|play_prepared|FinishNativeQueue|resume_or_finish|recv_timeout)\b' \
src/core/driver/mod.rs \
src/infra/audio/player.rs \
src/infra/radio/dispatch.rs \
src/infra/radio/stream.rs \
src/infra/network/mod.rs \
src/infra/queue/dispatch.rsLength of output: 113070
The follow-up addresses the five review points:
I also confirmed the CI action replacement, the The reported test results were not independently run in this sandbox. ✏️ Learnings added
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Thanks, 246db13 does what each of the five comments asked, and the radio and bounded() fixes are right. One more round on the recovery mechanism before merge. The inline comments below share one root cause: recovery expresses "stay paused" as a PausePlayback queued ahead of async work that ends in sink.play(). A desired-play-state flag on the session that the restage, resume and commit paths read, the way queue_slot_desired_playing already works for the Spotify slot, fixes the context arm, the queue settle step and the suspended-context resume in one place.
Two findings sit in files outside this diff, so no inline anchor:
bounded() waits still run under the App lock. The 3 s poll / 90 s ceiling is reached while the tokio App mutex is held: commit_fetch in src/infra/qobuz/dispatch.rs holds app.lock() across player.play_prepared, the queue resume_local across player.seek, teardown_local / teardown_radio across player.stop through if-let temporaries, and local play_index calls player.stop() on the serial pump. tui/runner.rs takes the same lock on every tick, key and draw, so the infinite freeze became a 90 s freeze in the case bounded() is documented as the backstop for. play_prepared's own doc says to call it off the App lock (see stop_detached); the other sites need the same treatment.
macOS media keys still need a Spotify session. MacMediaManager registration in src/runtime/startup.rs:348 is gated on streaming_attempted, justified by the comment "macOS plays no decoded source", while Windows registers unconditionally so decoded sources get media keys. A macOS user who picks Qobuz or Local Files in the first-run picker and skips the Spotify login (supported since #495) gets no media keys, no Now Playing and no AirPods play/pause for a source that now plays fine, and route_decoded_macos_event is unreachable. Same stale prose: player.rs:124 ("or on macOS"), core/first_run.rs:11 and :55.
Not blocking, a follow-up issue is fine for these:
from_device(..).open_sink_or_fallback()drops rodio'sopen_default_sinksweep over the other outputs. An HDMI default on a powered-off monitor, or a WASAPI exclusive hold, now fails every decoded source and everyreopen.- On Linux/ALSA cpal's default device is the constant "Default Audio Device", so the name compare can never fire there and only
DeviceNotAvailableworks. - Radio
play_preparedreturns()and no-ops on a lost device, and the caller publishesradio_playbackand shows the station live anyway. - Local
play_filedevice errors go tofail_index, which poisons the track and ends a one-track session with "no playable tracks left".
| } | ||
| $app.dispatch(IoEvent::ReplayCurrentTrack); | ||
| if resume_ms > 0 { | ||
| $app.dispatch(IoEvent::Seek(resume_ms)); |
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ReplayCurrentTrack can fail on the fresh sink (a second default flap during the decode, a rejected format), and every per-source replay_current tears its session down on failure. The Seek and PausePlayback queued behind it then find no decoded session and no queue slot, fall through the router chain to Network::handle_network_event, and seek the user's real Spotify player to resume_ms and pause it. Neither event is in event_bypasses_spotify_auth, so a Spotify-free build shows two "Not connected to Spotify" toasts for an unplugged cable instead. Do not queue these blind from the tick: have the replay path apply the seek and the pause state itself once the track is staged, or dispatch them only from its success arm.
| if let Some(s) = $app.$playback.as_mut() { | ||
| s.advancing = true; | ||
| } | ||
| $app.dispatch(IoEvent::ReplayCurrentTrack); |
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The removal half still expresses "stay paused" as a PausePlayback queued behind work that ends in sink.play(). The replay plays before the pause drains, so a removed device still gets an audible burst on the new default. Qobuz mid-download is worse: replay_current returns early ("still downloading"), the pause pauses the empty sink, then commit_fetch computes was_paused = tempfile.is_some() && is_paused(), which is false in that window, and play_prepared starts the track on the laptop speakers seconds after the user unplugged. Replace the queued pause with a desired-play-state flag on the session that the restage and commit paths read.
| ))] | ||
| if let Some(pause_after) = queue_device_recovered { | ||
| if pause_after { | ||
| app.dispatch(IoEvent::PausePlayback); |
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Two shapes where this settle step misses.
- Slot mid-download:
advancingis latched andnative_queue_advance_dueneeds!advancing, so the advance block above does not fire. ThisPausePlaybackpauses the empty reopened sink, thenfinish_decoded_fetchcallsplay_file, which ends insink.play(), and the queue continues on the speakers under "paused here". - Queue empty over a suspended Spotify, shuffled Spotify or Radio context:
advance_native_queuerunsresume_or_finish, which dispatchesResumeSpotifyContext(or the radio equivalent) behind this pause. The pause is a no-op on the idle player and the context resumes at full volume on the new default.
Same fix as the context arm: a desired-play-state flag the resume and commit paths consult, instead of an event that races them.
| // No device to play on. Hand the slot to the same teardown a drained | ||
| // queue uses: clearing `queue_now` here would strand the suspended | ||
| // context (latched `advancing`) and the remaining queued items. | ||
| app.dispatch(IoEvent::FinishNativeQueue); |
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No latch here. FinishNativeQueue is dispatched, but nothing lost reads changes, so every tick until the pump drains it repeats the 5 s reopen() under the App lock and restamps the message. Then resume_or_finish restages the suspended context onto the same LocalPlayer when it is Arc::ptr_eq to the slot's (a suspended Local context shares it): live_player() refuses, play_file bails, fail_index marks the resume index failed, and a one-track context ends with "no playable tracks left", a device error reported as an unplayable library. Latch the failure so the reopen runs once, and have the teardown either reopen the shared player or surface a device error on the restage instead of poisoning the track.
| let reopened = $app | ||
| .$playback | ||
| .as_ref() | ||
| .is_some_and(|s| s.player.reopen().is_ok()); |
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Keeping the reopen on the tick was my call and 5 s is fine as a backstop. The part that is not fine is that a timeout ends the session with no retry. A Bluetooth output on macOS can take 1 to 5 s to negotiate after AirPods go back in the case, so a timeout here is a device that would have opened a second later, and the flag that would trigger another attempt died with $playback. On timeout keep the session, and retry on a later tick with a bounded attempt count.
| /// | ||
| /// Two ways to fail (see module docs): the device was removed and cpal told | ||
| /// us, or the OS quietly moved its default output elsewhere and nobody did. | ||
| pub fn device_lost(&self) -> bool { |
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This holds the sink mutex across a full default_host().default_output_device() plus description() round trip, and Driver::tick calls it for every live session on every tick, which is 16 ms on the Home screen with the banner gradient on. That is roughly 60 WASAPI enumerator and property-store reads a second (CoreAudio also enumerates every supported input and output config), on the UI thread, under the App lock, while position() / is_paused() / is_finished() on the render path wait on the same mutex. Throttle the name compare to once a second, and release the sink lock before the cpal query.
| /// lock (see `stop_detached`). | ||
| /// lock (see `stop_detached`). A no-op once the device is gone. | ||
| #[cfg(any(feature = "internet-radio", feature = "qobuz"))] | ||
| pub fn play_prepared(&self, stream: PreparedStream) { |
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play_prepared did not get the post-clear Arc::ptr_eq(&sink, &self.player()) re-check that play_file got. bounded(clear) returns promptly (the identity check is only on the poll), so a stream prepared across a concurrent reopen() is appended to the discarded sink and play() is called on it. The fresh sink reports device_lost() == false, so recovery never fires again: the track shows as playing and the position never advances. For radio that is forever, since radio never polls is_finished.
2 participants
Two freezes and a platform. The freezes are the urgent half — they affect the released Linux and Windows binaries today; macOS enablement is what uncovered them.
Fixes #496 (losing the audio output device) — Fixes #497 (an undecodable radio station)
The freezes
Both are the same class: an unbounded wait on the serial IoEvent pump. When one of those never returns it takes every unrelated request queued behind it, so the app looks frozen — search dead, transport dead — rather than merely silent.
clear()andtry_seek()wait on the audio callback with no timeout. Lose the output device and that callback never runs again.LocalPlayernow refuses those calls once the device is gone, and the driver's tick rebuilds the output on the new default device and restages the track there, paused where it stopped — what macOS itself does when AirPods come out.Detection has two shapes and only one is an error anybody reports: cpal sees a device removed, but it cannot see the OS moving its default output elsewhere, which is the common case and leaves the stream feeding a device nobody hears. So the sink also remembers what it opened and compares against the current default.
stream.rsalready caps connect and header waits for exactly this reason; the probe was the third step of that sequence and was unbounded. Now capped — and giving up cancels the download, not the reader, because the probe parks insidereadwhere a flag would never be seen.macOS
LocalPlayer::open_sink()bailed on macOS. That bail was never a fix for an observed crash in this engine: it has been there since the commit that introduced the player, inherited from #9/#20, which were librespot-playback's ownrodio-backendon an older rodio. The lockfile still carries both — librespot pulls rodio 0.21/cpal 0.16, this player uses rodio 0.22/cpal 0.17 and the rewrittenDeviceSinkBuilderAPI. cpal already ran on macOS in every shipped build viaaudio-viz-cpal, androute_decoded_macos_eventwas already written and unreachable.Native Spotify streaming is untouched and keeps
portaudio-backend.This changes what macOS release binaries contain:
cd.yml's two macOS rows gain the five sources, so those binaries get bigger and the YouTube source wantsyt-dlp, matching the Windows row.What is verified, and what is not
Nothing in CI covered any of this — all seven legs are
ubuntu-latest. This PR adds amacos-latestcheck + clippy job using cd.yml's macOS feature set, since that is the only leg that compiles thecfg(target_os = "macos")arms, portaudio,macos-mediaandaudio-viz-cpal. Notestjob: the suite is platform-independent logic the Linux legs already run, and the device tests are#[ignore]d because runners have no audio output.So the audio path itself was verified by hand on real hardware (M-series Mac, macOS 26.6): local files, radio and YouTube playing over built-in output and over Bluetooth, headphones disconnected mid-track, and the previously-hanging station. Seven
#[ignore]d live tests that drive the real sink (radio, YouTube, Qobuz) pass locally, plus six device tests inplayer.rs— including one timeout-asserted on a worker thread, because a regression there deadlocks instead of failing.The five ignored Subsonic live tests fail on
maintoo:demo.navidrome.orgnow returns an empty playlist first, soplaylists[0]has no tracks. Unrelated, untouched.Deliberate limits
AdtsReaderclaims onlyff f1, notff f9); worth filing there, not worth a fork here.open_sinkno longer falls back to sweeping every other output device (that path required rodio's helper, which installs aneprintln!error callback that corrupts the TUI). It still falls back across the default device's other configs; a machine whose default output cannot be opened now gets a clear error instead of audio from a surprise device.🤖 Generated with Claude Code
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