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[client] audio: ignore jitter after underruns

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Do not learn late delivery from packets that already caused an
underrun and media-clock rebase. Preserve learned jitter only across
continuous playback.
This commit is contained in:
Geoffrey McRae
2026-08-22 17:04:25 +10:00
parent 7476e56ded
commit 5b106015de
3 changed files with 36 additions and 3 deletions
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7
client/src/audio.c
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@@ -924,7 +924,7 @@ static int64_t playbackMapMediaTime(PlaybackSourceData * sourceData,
}
const int64_t delta = time - sourceData->mediaTime;
if ((!clock || !clock->discontinuity) &&
if (!*discontinuity && (!clock || !clock->discontinuity) &&
sourceData->mediaClockFromSource == fromSource &&
sourceData->mediaPositionValid &&
sourceData->mediaPosition == position && delta >= 0 &&
@@ -937,8 +937,9 @@ static int64_t playbackMapMediaTime(PlaybackSourceData * sourceData,
(now - sourceData->lastArrivalTime) * 1.0e-9;
const double lateness = max(arrivalDelta - mediaDelta, 0.0);
/* Learn harmful late delivery before a buffer underrun rebases the media
* clock. Early catch-up packets do not require additional reserve. */
/* Learn harmful late delivery only while playback remains continuous.
* An underrun rebases the media clock and must not become future
* latency. Early catch-up packets do not require additional reserve. */
sourceData->arrivalJitterSec =
min(PLAYBACK_MAX_JITTER_SEC,
max(lateness, sourceData->arrivalJitterSec *