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fix: preserve audio samples across Miruro timestamp jitter

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Valdemar Høgsvig Lorenzen
2026-10-13 16:13:33 +02:00
parent 51382bc63a
commit 4ef8ceee24
6 changed files with 11 additions and 5 deletions
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README.md
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@@ -315,7 +315,7 @@ make check
Generates short fixtures and exercises the real playback interface and native outputs: audio/video, video-only, audio-only, non-square-pixel display aspect, pause, paused/playing and queued seek acknowledgement, exact bidirectional VFR/B-frame stepping across keyframes, repeated-step bursts beyond the ordinary command capacity, mixed seek/direction ordering, replacement media superseding a long pending run, first/last-frame boundaries, stepping pause/resume, completion, replay, close, HDR rejection, failed-open recovery, and destruction while playing. It initializes the actual Metal shaders and uses an offscreen native window. It requires a working audio device and graphical macOS session, and plays short sine-wave audio. It is a runtime smoke check, not a mocked clock/device test.
`make check-audio` runs just the audio-quality check. A check-only hook captures actual Core Audio callback PCM into preallocated storage and compares every sample against FFmpeg's reference output for PCM/AAC, 44.1/48 kHz, and coarse container timestamps. It verifies that repeated forward/backward stepping stays silent and that resumed audio matches the exact selected-frame PCM suffix. It also checks fractional gain, silent muted startup, smooth live volume changes, and unchanged playback completion. A separate gapped fixture verifies that real timestamp gaps remain silent. Release builds contain no capture hook.
`make check-audio` runs just the audio-quality check. A check-only hook captures actual Core Audio callback PCM into preallocated storage and compares every sample against FFmpeg's reference output for PCM/AAC, 44.1/48 kHz, coarse container timestamps, and AAC in MPEG-TS with millisecond-rounded timestamps. Audio continuity allows up to two milliseconds of timestamp jitter (or a larger container tick) without inserting or dropping samples; this covers Miruro streams whose advertised 90 kHz timebase overstates their timestamp precision. It verifies that repeated forward/backward stepping stays silent and that resumed audio matches the exact selected-frame PCM suffix. It also checks fractional gain, silent muted startup, smooth live volume changes, and unchanged playback completion. A separate gapped fixture verifies that real timestamp gaps remain silent. Release builds contain no capture hook.
`make check-window` runs the compact-mode check, also included in `make check`. It exercises magnetic thresholds/corners, negative-origin screens, portrait/extreme aspect bounds, configured/session-only snapping, actual hidden-window entry/resizing/snapping/restoration, remembered manual compact width across reentry/controller recreation with a different aspect, isolation from programmatic/normal-window resizing, view-host identity, keyboard eligibility, and a replay of AppKit's fullscreen-failure lifecycle. It requires a graphical macOS session but does not display windows or play audio. Visible fullscreen transitions, cross-Space/Stage Manager behavior, and hover/drag usability still require a check in the app.