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ALSA: prevent excessive slave-device latency updates on underrun

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This commit is contained in:
Robin Gareus 2022-05-04 05:57:52 +02:00
parent fd33784e45
commit 96c138c985
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 17 additions and 2 deletions
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19
libs/backends/alsa/alsa_audiobackend.cc
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@ -2222,18 +2222,33 @@ AlsaAudioBackend::AudioSlave::update_latencies (uint32_t play, uint32_t capt)
{
LatencyRange lr;
lr.min = lr.max = (capt);
bool changed = false;
for (std::vector<BackendPortPtr>::const_iterator it = inputs.begin (); it != inputs.end (); ++it) {
LatencyRange lx;
lx = (*it)->latency_range (false);
if (lr == lx) {
continue;
}
(*it)->set_latency_range (lr, false);
changed = true;
}
lr.min = lr.max = play;
for (std::vector<BackendPortPtr>::const_iterator it = outputs.begin (); it != outputs.end (); ++it) {
LatencyRange lx;
lx = (*it)->latency_range (true);
if (lr == lx) {
continue;
}
(*it)->set_latency_range (lr, true);
changed = true;
}
#ifndef NDEBUG
printf ("ALSA SLAVE-device latency play=%d capt=%d\n", play, capt); // XXX DEBUG
printf ("ALSA SLAVE-device latency play=%d capt=%d changed:%d\n", play, capt, changed); // XXX DEBUG
#endif
UpdateLatency (); /* EMIT SIGNAL */
if (changed) {
UpdateLatency (); /* EMIT SIGNAL */
}
}
/******************************************************************************/