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Make sure prebuf is filled when starting pulseaudio playback

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This commit is contained in:
Chris Robinson
2020-03-27 01:03:01 -07:00
parent e73c0979a1
commit 8731accd3f
1 changed files with 25 additions and 1 deletions
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alc/backends/pulseaudio.cpp
+25 -1
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@@ -1050,8 +1050,32 @@ bool PulsePlayback::start()
pa_stream_set_write_callback(mStream, &PulsePlayback::streamWriteCallbackC, this);
pa_operation *op{pa_stream_cork(mStream, 0, &PulseMainloop::streamSuccessCallbackC,
&mMainloop)};
mMainloop.waitForOperation(op, plock);
/* Write some (silent) samples to fill the prebuf amount if needed. */
if(size_t prebuf{mAttr.prebuf})
{
prebuf = minz(prebuf, pa_stream_writable_size(mStream));
void *buf{pa_xmalloc(prebuf)};
switch(mSpec.format)
{
case PA_SAMPLE_U8:
std::fill_n(static_cast<uint8_t*>(buf), prebuf, 0x80);
break;
case PA_SAMPLE_ALAW:
std::fill_n(static_cast<uint8_t*>(buf), prebuf, 0xD5);
break;
case PA_SAMPLE_ULAW:
std::fill_n(static_cast<uint8_t*>(buf), prebuf, 0x7f);
break;
default:
std::fill_n(static_cast<uint8_t*>(buf), prebuf, 0x00);
break;
}
pa_stream_write(mStream, buf, prebuf, pa_xfree, 0, PA_SEEK_RELATIVE);
}
mMainloop.waitForOperation(op, plock);
return true;
}