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Sound System Rework: Phase 2

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. Performance boost
  (Completely non-blocking between Sound thread and CPU thread, in the meantime keeping them thread safe)

. Both 32KHz & 48KHz sound can be handled properly now
  (But up-sampling is still not implemented, and I don't think any game requires it.)

. Strategy adjustment
  When your PC is *NOT* capable to run the game at 100%:
  >> DSound    Could yield more fluent sound than OpenAL sometimes, but you will lose the sync between video & audio (since audio is played before video to guarantee fluency)
  >> OpenAL    Ensures video & audio are always sync'ed, but sound could be intermittent(to let slow video catch up)

. Changed default frame limit to: Auto
  (Somehow this can dramatically decrease the chance of wiimote desync in game NSMB)

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4724 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
ayuanx
2009-12-23 15:34:14 +00:00
parent 0d0a7c515f
commit 9eea60ca69
27 changed files with 358 additions and 314 deletions
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19
Source/Core/AudioCommon/Src/OpenALStream.cpp
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@ -138,12 +138,13 @@ void OpenALStream::SoundLoop()
// Generate a Source to playback the Buffers
alGenSources(1, &uiSource);
memset(realtimeBuffer, 0, OAL_BUFFER_SIZE);
// Short Silence
memset(realtimeBuffer, 0, OAL_MAX_SAMPLES * 4);
for (int i = 0; i < OAL_NUM_BUFFERS; i++)
alBufferData(uiBuffers[i], AL_FORMAT_STEREO16, realtimeBuffer, OAL_BUFFER_SIZE, ulFrequency);
alBufferData(uiBuffers[i], AL_FORMAT_STEREO16, realtimeBuffer, OAL_MAX_SAMPLES, ulFrequency);
alSourceQueueBuffers(uiSource, OAL_NUM_BUFFERS, uiBuffers);
alSourcePlay(uiSource);
err = alGetError();
// TODO: Error handling
@ -158,12 +159,12 @@ void OpenALStream::SoundLoop()
alGetSourcei(uiSource, AL_BUFFERS_PROCESSED, &iBuffersProcessed);
iBuffersFilled = 0;
}
int numSamples = m_mixer->GetNumSamples();
numSamples &= ~0x100;
if (iBuffersProcessed && numSamples)
unsigned int numSamples = m_mixer->GetNumSamples();
if (iBuffersProcessed && (numSamples >= OAL_THRESHOLD))
{
numSamples = (numSamples > OAL_BUFFER_SIZE / 4) ? OAL_BUFFER_SIZE / 4 : numSamples;
numSamples = (numSamples > OAL_MAX_SAMPLES) ? OAL_MAX_SAMPLES : numSamples;
// Remove the Buffer from the Queue. (uiBuffer contains the Buffer ID for the unqueued Buffer)
if (iBuffersFilled == 0)
alSourceUnqueueBuffers(uiSource, iBuffersProcessed, uiBufferTemp);
@ -176,11 +177,11 @@ void OpenALStream::SoundLoop()
if (iBuffersFilled == OAL_NUM_BUFFERS)
alSourcePlay(uiSource);
}
else
else if (numSamples >= OAL_THRESHOLD)
{
ALint state = 0;
alGetSourcei(uiSource, AL_SOURCE_STATE, &state);
if (state != AL_PLAYING)
if (state == AL_STOPPED)
alSourcePlay(uiSource);
}
soundSyncEvent.Wait();