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alsa-sink: Do not increase watermark when requested to rewind 0 bytes

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Since commit cb91d7a1 the watermark is increased when there is nothing to rewind.
This is also done in the case when there was actually no rewind requested at all,
so the watermark is increased needlessly.
This patch fixes the issue by skipping the rewind if none is requested.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/530>
This commit is contained in:
Georg Chini 2021-03-20 12:53:22 +01:00 • committed by PulseAudio Marge Bot
parent 169f8c5f2c
commit 015028d7e3
1 changed files with 3 additions and 0 deletions
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3
src/modules/alsa/alsa-sink.c
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@ -1825,6 +1825,9 @@ static int process_rewind(struct userdata *u) {
pa_log_debug("Requested to rewind %lu bytes.", (unsigned long) rewind_nbytes);
if (rewind_nbytes == 0)
goto rewind_done;
if (PA_UNLIKELY((unused = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->sink->sample_spec)) < 0)) {
if ((err = try_recover(u, "snd_pcm_avail", (int) unused)) < 0) {
pa_log_warn("Trying to recover from underrun failed during rewind");