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OpenAL: YES! The first version of working OpenAL Backend!

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I've only test in Ikaruga and Metroid Prime, at least they have sound.
Performance is ugly, :<, still need more work on it.
To enable oal in Dolphin, uncomment Source/Core/Common/Src/Common.h:
//#define HAVE_OPENAL 1



git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2865 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hyperiris 2009-04-04 03:58:16 +00:00
parent 5d72a992bf
commit 36143f98b7
2 changed files with 55 additions and 5 deletions
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57
Source/Core/AudioCommon/Src/OpenALStream.cpp
View File

@ -21,6 +21,7 @@
#if defined HAVE_OPENAL && HAVE_OPENAL
#define AUDIO_NUMBUFFERS (4)
//#define AUDIO_SERVICE_UPDATE_PERIOD (20)
bool OpenALStream::Start()
{
@ -96,16 +97,62 @@ THREAD_RETURN OpenALStream::ThreadFunc(void* args)
void OpenALStream::SoundLoop()
{
while (!threadData) {
soundCriticalSection.Enter();
ALuint uiBuffers[AUDIO_NUMBUFFERS] = {0};
ALuint uiSource = 0;
ALenum err;
u32 ulFrequency = m_mixer->GetSampleRate();
// Generate some AL Buffers for streaming
alGenBuffers(AUDIO_NUMBUFFERS, (ALuint *)uiBuffers);
// Generate a Source to playback the Buffers
alGenSources(1, &uiSource);
// Add sound playing here
// m_mixer->Mix(realtimeBuffer, numBytesToRender >> 2);
soundCriticalSection.Leave();
memset(realtimeBuffer, 0, OAL_BUFFER_SIZE * sizeof(short));
//*
for (int iLoop = 0; iLoop < AUDIO_NUMBUFFERS; iLoop++)
{
// pay load fake data
alBufferData(uiBuffers[iLoop], AL_FORMAT_STEREO16, realtimeBuffer, 1024, ulFrequency);
alSourceQueueBuffers(uiSource, 1, &uiBuffers[iLoop]);
}
//*/
alSourcePlay(uiSource);
err = alGetError();
while (!threadData)
{
ALint iBuffersProcessed = 0;
alGetSourcei(uiSource, AL_BUFFERS_PROCESSED, &iBuffersProcessed);
if (iBuffersProcessed)
{
// Remove the Buffer from the Queue. (uiBuffer contains the Buffer ID for the unqueued Buffer)
ALuint uiTempBuffer = 0;
alSourceUnqueueBuffers(uiSource, 1, &uiTempBuffer);
soundCriticalSection.Enter();
int numBytesToRender = 32768; //ya, this is a hack, we need real data count
m_mixer->Mix(realtimeBuffer, numBytesToRender >> 2);
soundCriticalSection.Leave();
unsigned long ulBytesWritten = 0;
//if (ulBytesWritten)
{
//alBufferData(uiTempBuffer, ulFormat, pDecodeBuffer, ulBytesWritten, ulFrequency);
alBufferData(uiTempBuffer, AL_FORMAT_STEREO16, realtimeBuffer, numBytesToRender, ulFrequency);
alSourceQueueBuffers(uiSource, 1, &uiTempBuffer);
}
}
if (!threadData)
soundSyncEvent.Wait();
}
alSourceStop(uiSource);
alSourcei(uiSource, AL_BUFFER, 0);
// Clean up buffers and sources
alDeleteSources(1, &uiSource);
alDeleteBuffers(AUDIO_NUMBUFFERS, (const ALuint *)uiBuffers);
}
#endif //HAVE_OPENAL

3
Source/Core/AudioCommon/Src/OpenALStream.h
View File

@ -33,6 +33,7 @@
#endif // WIN32
// public use
#define SFX_MAX_SOURCE 1
#define OAL_BUFFER_SIZE 1024*1024
#endif
@ -56,6 +57,8 @@ private:
Common::Thread *thread;
Common::CriticalSection soundCriticalSection;
Common::Event soundSyncEvent;
short realtimeBuffer[OAL_BUFFER_SIZE];
#else
public:
OpenALStream(CMixer *mixer, void *hWnd = NULL): SoundStream(mixer) {}