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alsa: don't change avail when unchanged

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Only update the avail when we did a snd_pcm_forward(). Otherwise
we might think there is more available than there really is and we
might get xrun.

See #3395
This commit is contained in:
Wim Taymans 2023-07-31 12:10:36 +02:00
parent c9b7367f8f
commit fd585baa88
1 changed files with 3 additions and 2 deletions
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3
spa/plugins/alsa/alsa-pcm.c
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@ -2498,9 +2498,10 @@ int spa_alsa_read(struct state *state)
if (avail < target) if (avail < target)
max_read = target - avail; max_read = target - avail;
else if (avail > target) else if (avail > target) {
snd_pcm_forward(state->hndl, avail - target); snd_pcm_forward(state->hndl, avail - target);
avail = target; avail = target;
}
state->alsa_sync = false; state->alsa_sync = false;
} else } else
state->alsa_sync_warning = true; state->alsa_sync_warning = true;