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[client] audio: increase startup latency

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Underruns can still happen quite easily at the beginning of playback,
particularly at very low latency settings. Further increase the startup
latency to avoid this.
This commit is contained in:
Chris Spencer
2022-02-05 09:53:06 +00:00
committed by Geoffrey McRae
parent 5e1b8f2abe
commit 0d97a51802
4 changed files with 25 additions and 36 deletions
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12
client/src/audio.c
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@@ -612,9 +612,17 @@ void audio_playbackData(uint8_t * data, size_t size)
if (audio.playback.state == STREAM_STATE_SETUP)
{
frames = ringbuffer_getCount(audio.playback.buffer);
if (audio.audioDev->playback.start(frames))
// In the worst case, the audio device can immediately request two full
// buffers at the beginning of playback. Latency corrections at startup can
// also be quite significant due to poor packet pacing from Spice, so
// additionally require at least two full Spice periods' worth of data
// before starting playback to minimise the chances of underrunning
int startFrames =
spiceData->periodFrames * 2 + audio.playback.deviceMaxPeriodFrames * 2;
if (spiceData->nextPosition >= startFrames) {
audio.audioDev->playback.start();
audio.playback.state = STREAM_STATE_RUN;
}
}
double latencyFrames = actualOffset;