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xaudio2: Don't render less than a period of audio. 

Sometimes the ALSA driver will report a very small amount of frames
available after a period signal. There is a bug in OpenAL 1.15 which
will crash the application if alcRenderSamplesSOFT is called with less
than 4 frames. And anyway, we shouldn't incur all of this overhead
just to render a couple of frames. So, just skip the rendering step if
we have less than a period of space available in the driver.

Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Andrew Eikum 2015-10-21 10:01:22 -05:00 committed by Alexandre Julliard
parent c5b54b34e9
commit 998e5a0432
1 changed files with 5 additions and 1 deletions
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6
dlls/xaudio2_7/xaudio_dll.c
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@ -2723,7 +2723,11 @@ static void do_engine_tick(IXAudio2Impl *This)
}
nframes = This->period_frames * 3 - pad;
TRACE("going to render %u frames\n", nframes);
TRACE("frames available: %u\n", nframes);
if(nframes < This->period_frames)
return;
if(!nframes)
return;