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AudioMixer: Notify the producer basing on latency variation

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* Since the producer may take an undefined amount of buffers to
process the latency increase, possibly depending on it's queue,
the consumer will notify only the difference between the old latency
and the new. While not solving completely, this improves the situation
under virtual box (and slow systems) making the sound more stable.
This commit is contained in:
Dario Casalinuovo
2016-01-19 22:43:25 +01:00
parent b64e8511cd
commit 1fe3cb8742
1 changed files with 7 additions and 2 deletions
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src/add-ons/media/media-add-ons/mixer/AudioMixer.cpp
+7 -2
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@@ -321,7 +321,11 @@ AudioMixer::BufferReceived(BBuffer *buffer)
void
AudioMixer::HandleInputBuffer(BBuffer* buffer, bigtime_t lateness)
{
if (lateness > kMaxJitter && lateness > fLastLateness) {
bigtime_t variation = 0;
if (lateness > fLastLateness)
variation = lateness-fLastLateness;
if (variation > kMaxJitter) {
debug_printf("AudioMixer: Dequeued input buffer %" B_PRIdBIGTIME
" usec late\n", lateness);
if (RunMode() == B_DROP_DATA || RunMode() == B_DECREASE_PRECISION
@@ -333,7 +337,7 @@ AudioMixer::HandleInputBuffer(BBuffer* buffer, bigtime_t lateness)
source.port = buffer->Header()->source_port;
source.id = buffer->Header()->source;
NotifyLateProducer(source, lateness, TimeSource()->Now());
NotifyLateProducer(source, variation, TimeSource()->Now());
if (RunMode() == B_DROP_DATA) {
debug_printf("AudioMixer: dropping buffer\n");
@@ -341,6 +345,7 @@ AudioMixer::HandleInputBuffer(BBuffer* buffer, bigtime_t lateness)
}
}
}
fLastLateness = lateness;
fCore->Lock();