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Fix ALSA buffer allocation.

Changing the audio buffer size only works when the audio device is closed. So close it before attempting to open it. This only works if myth has write access
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jyavenard committed Dec 14, 2010
1 parent 44b6ab2 commit 04c15e14898db69477d4c4a42e8307e62de5b3ac
Showing with 5 additions and 0 deletions.
  1. +5 −0 mythtv/libs/libmyth/audio/audiooutputalsa.cpp
@@ -180,6 +180,11 @@ bool AudioOutputALSA::SetPreallocBufferSize(int size)
if (GetPCMInfo(card, device, subdevice) < 0)
return false;

// We can not increase the size of the audio buffer while device is opened
// so make sure it is closed
if (pcm_handle != NULL)
CloseDevice();

QFile pfile(QString("/proc/asound/card%1/pcm%2p/sub%3/prealloc")
.arg(card).arg(device).arg(subdevice));

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