Direct Play of any (E-)AC-3 track on Apple TV developed persistent
micro-stutter: mpv's audio clock was derived from es_pts on the
compressed path, which is credited a whole 32 ms burst the moment a
payload lands, sawtoothing the clock on a ~0.8 s cycle that video
retires as visible skip/hold pairs. AAC content was unaffected, which
is why the symptom tracked Dolby audio and survived every VO-side fix.
MPVKit 1.0.23 measures the clock from IEC samples actually handed to
ao_read_data instead. Verified with an HDMI capture rig against the
CI-built binary: EAC3 display cadence is now statistically identical
to AAC (was 47.6 skips/min plus 453 multi-frame holds over 38 min).
close#1776
Direct Play on Apple TV develops recurring micro-stutter that worsens
the longer playback runs and clears temporarily on pause/play
(issue #1776). Since 2.4 the avfoundation VO has presented frames
against a media-time CMTimebase anchored and rate-servoed to follow
mpv's audio-slaved schedule; clock skew between the two domains can
only be retired by rate slewing or a re-anchor snap that retimes every
queued frame at once. The media timebase exists for PiP, which tvOS
does not have.
Bump MPVKit to 1.0.22 and opt tvOS into its new
avfoundation-presentation=host mode: samples carry mpv's scheduled
display time against a free-running host-clock timebase, so drift is
absorbed per frame inside mpv and no timing state accumulates in the
VO. The queue lead returns to 128ms; 500ms only dampened media-mode
snaps and quadrupled their blast radius. 1.0.22 also paces the
compressed-passthrough feed off the most-advanced playhead reading,
fixing the periodic audio dropouts passthrough users reported on 2.14.
AC3/EAC3 playback could stutter after AVFoundation began handling compressed streams. Decline compressed formats in macOS AVFoundation so mpv falls through to CoreAudio, while retaining AVFoundation for PCM and the tvOS Dolby path.
close#1940
Picks up two vo_avfoundation fixes: keep the displayed frame across
seek resets, and refuse Core Image geometry rendering for Dolby
Vision passthrough frames (defense in depth - the app already keeps
mpv video-zoom at 0 on iOS/tvOS and zooms the display layer instead).
Nonzero mpv video-zoom flips vo_avfoundation into a per-frame Core
Image re-render that destroys HDR/DV passthrough - DV frames render
near-black on tvOS (verified on Apple TV 4K, DV P7->8.1 content:
panel luma mean 0.0 zoomed vs 87-103 unzoomed at locked exposure).
Zoom now scales the AVSampleBufferDisplayLayer itself (a
sublayerTransform on the container is ignored by the video plane)
via the existing Player.setVideoZoom seam, and VideoFilterManager
pins the mpv property to 0 on backends with native zoom. The layer
tree at 100% stays identical to before: clipping engages only while
zoomed, and updateFrame sizes the layer via bounds/position, which
frame= decomposes to anyway.
macOS keeps the property path (gpu-next zooms losslessly in-shader);
Android is untouched.
RawEc3Loader and its ProbeURLProtocol harness were deleted with the Atmos
output diagnostics, but the iOS RunnerTests kept exercising them, so the
Apple native reliability job no longer compiled.
Detection now runs off the UI isolate and covers every platform where
the answer can be trusted.
Availability was a plain platform check, so Linux always listed VLC, mpv
and Celluloid, macOS always listed VLC and IINA, and Windows always
listed VLC and PotPlayer whether or not any of them existed. Each player
now has a detector that asks exactly the question its launcher asks:
`sh -c 'command -v'` for PATH launches so the kernel performs the
executable check, NSWorkspace/Launch Services for `open -a`, `where.exe`
plus the concrete install paths for Windows VLC, and the registered URL
handler for PotPlayer and the iOS players.
Detection is asynchronous and memoised behind KnownPlayers.probe rather
than a Process.runSync in a static initialiser, which forked three
shells on the UI isolate during ExternalPlayerScreen.build. It is
prewarmed from startup, fails open when a probe throws, and keeps the
selected player listed when a detector misses it so a false negative
cannot leave the list with nothing selected.
iOS and tvOS gained LSApplicationQueriesSchemes entries for vlc and
infuse. Without them canOpenURL returns false for both schemes, so
_launchUrlScheme was already refusing to hand off to either player.
Android keeps the platform check: package visibility needs native
declarations, and a wrong answer there hides a working player.
Brings in the AVFoundation audio output's bounded PCM lookahead, which
is compiled in on macOS only. AVSampleBufferAudioRenderer holds roughly
1.7s of audio there, and mpv multiplies --volume into the samples as it
hands them over, so a volume change stayed inaudible until that backlog
drained. The bound cuts the queue to about 450ms, measured; tvOS and
iOS preprocess to the source they had before the patch, so the deep
buffering their AirPlay path relies on is untouched.
Also carries the Dolby-conformant compressed EAC3 sink from 1.0.15.
Groundwork for #1300. Establishes the session, buffering and route
handling Dolby's application guide prescribes, and adds the diagnostic
arm needed to find out whether Apple's sample-buffer renderer can carry
Atmos objects at all.
Audio session, per the guide's sequence:
- Adopt the long-form playback profile in one atomic call at app launch
and activate the session there. The SDK only accepts that policy with
category Playback, a Default/MoviePlayback/SpokenAudio mode and no
options, so it cannot be assembled from separate calls.
- Report the resolved rendering mode in the player, hidden unless the
system resolves it. Apple only resolves it for CarPlay and AirPlay, so
an unresolved value means unknown, never "not Dolby".
Diagnostics (Apple TV only, Settings > Video Playback > Atmos Output Test):
- Add a sample-buffer arm. It reads the asset with AVAssetReader at
outputSettings nil and hands the untouched compressed buffers and the
untouched format description straight to the renderer, with a variant
that rebuilds the description the way playback builds it. Every
existing mode went through AVPlayer, so nothing exercised the path
playback actually uses; this is what tells us whether the renderer or
our construction is at fault.
- Add an AirPlay route picker. AirPlay is the only route where the system
resolves the rendering mode and the supported channel layouts, so it is
what makes those observations reachable at all, and the AVPlayer arms
now allow external playback so every arm can be compared on the same
destination.
- Add a session-mode toggle for the one profile difference between the
guide and previous playback behaviour.
- Report the session profile, supported layouts, both format
descriptions, the magic cookie and the renderer status, and release the
session on stop so a failed run cannot contaminate the next one.
Also bumps MPVKit to 1.0.14, which carries the matching audio output
work: the channel layout AVFoundation itself uses for Dolby content, a
renderer-failure observer so the fallback to PCM can actually run, the
prescribed feed ordering and preroll, flush recovery that re-supplies the
discarded audio instead of shifting later audio into its place, and
capability-driven fallback on route and capability changes.
This does not yet fix#1300. Whether the sample-buffer renderer can carry
JOC is still unknown; it removes every difference from the documented
setup that could explain the failure, and gives us the arm to answer it
on real hardware.
When the display/system sleeps with a video paused, the window server
stops completing CAMetalLayer presents and mpv's MoltenVK swapchain wedges,
pinning one core at 100% until the app exits. occlusionState does not
reliably change on display sleep, so observe NSWorkspace screensDidSleep/
Wake to hide the metal layer (and drop the playback activity) while dark,
restoring on wake with a forced redraw when paused to avoid a stale frame.
Pairs with MPVKit v1.0.10, which gates libmpv presentation on the layer's
hidden state (check_visible) so presents actually stop while hidden.
The non-mixing playback session was activated in didFinishLaunching,
so merely opening the app stopped other apps' audio. Keep the category
configuration; playback start activates the session.
Audio-only mpv core on every platform (dedicated
com.plezy/mpv_audio_player channels): parameterized android/windows/
linux mpv plugins and a new apple MpvAudioPlayerCore, all skipping
video/window paths (vid=no, audio-display=no, gapless-audio=weak).
MusicPlaybackService drives an in-memory queue with shuffle/repeat,
file-loaded-event gapless arming (property edges coalesce and the
android bridge drops them), per-track progress reporting, OS media
controls, audio focus, sleep timer, and error auto-skip.
PlaybackCoordinator enforces one live native player: starting video
disposes the audio core first.
Re-enables Audio Passthrough on Apple TV against the MPVKit EAC3-JOC
AVPlayer sink (pin bump to v1.0.8 follows), adds an AVPlayer test
harness + diagnostics screen for #1300, and makes loudnorm yield while
passthrough is active (fixes a latent spdif conflict on desktop too).
Routes all single-layer DV profile 8 (incl. compat 0) through the Apple
DV decode path, so VideoToolbox decodes it in hardware as true Dolby
Vision instead of failing over to software HDR10. Refs #1262.
edde746