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// Copyright (C) 2003 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include <functional>
#include "aldlist.h"
#include "OpenALStream.h"
#if defined HAVE_OPENAL && HAVE_OPENAL
//
// AyuanX: Spec says OpenAL1.1 is thread safe already
//
bool OpenALStream::Start()
{
ALDeviceList *pDeviceList = NULL;
ALCcontext *pContext = NULL;
ALCdevice *pDevice = NULL;
bool bReturn = false;
soundSyncEvent.Init();
pDeviceList = new ALDeviceList();
if ((pDeviceList) && (pDeviceList->GetNumDevices()))
{
char *defDevName = pDeviceList-> \
GetDeviceName(pDeviceList->GetDefaultDevice());
pDevice = alcOpenDevice(defDevName);
if (pDevice)
{
pContext = alcCreateContext(pDevice, NULL);
if (pContext)
{
alcMakeContextCurrent(pContext);
thread = std::thread(std::mem_fun(&OpenALStream::SoundLoop), this);
bReturn = true;
}
else
{
alcCloseDevice(pDevice);
PanicAlertT("OpenAL: can't create context "
"for device %s", defDevName);
}
}
else
{
PanicAlertT("OpenAL: can't open device %s", defDevName);
}
delete pDeviceList;
}
else
{
PanicAlertT("OpenAL: can't find sound devices");
}
return bReturn;
}
void OpenALStream::Stop()
{
threadData = 1;
// kick the thread if it's waiting
soundSyncEvent.Set();
thread.join();
alSourceStop(uiSource);
alSourcei(uiSource, AL_BUFFER, 0);
// Clean up buffers and sources
alDeleteSources(1, &uiSource);
uiSource = 0;
alDeleteBuffers(OAL_NUM_BUFFERS, uiBuffers);
ALCcontext *pContext = alcGetCurrentContext();
ALCdevice *pDevice = alcGetContextsDevice(pContext);
alcMakeContextCurrent(NULL);
alcDestroyContext(pContext);
alcCloseDevice(pDevice);
soundSyncEvent.Shutdown();
}
void OpenALStream::SetVolume(int volume)
{
fVolume = (float)volume / 100.0f;
if (uiSource)
alSourcef(uiSource, AL_GAIN, fVolume);
}
void OpenALStream::Update()
{
soundSyncEvent.Set();
}
void OpenALStream::Clear(bool mute)
{
m_muted = mute;
if(m_muted)
{
alSourceStop(uiSource);
}
else
{
alSourcePlay(uiSource);
}
}
void OpenALStream::SoundLoop()
{
ALenum err;
u32 ulFrequency = m_mixer->GetSampleRate();
memset(uiBuffers, 0, OAL_NUM_BUFFERS * sizeof(ALuint));
uiSource = 0;
// Generate some AL Buffers for streaming
alGenBuffers(OAL_NUM_BUFFERS, (ALuint *)uiBuffers);
// Generate a Source to playback the Buffers
alGenSources(1, &uiSource);
// 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_MAX_SAMPLES, ulFrequency);
alSourceQueueBuffers(uiSource, OAL_NUM_BUFFERS, uiBuffers);
alSourcePlay(uiSource);
// Set the default sound volume as saved in the config file.
alSourcef(uiSource, AL_GAIN, fVolume);
err = alGetError();
// TODO: Error handling
ALint iBuffersFilled = 0;
ALint iBuffersProcessed = 0;
ALuint uiBufferTemp[OAL_NUM_BUFFERS] = {0};
while (!threadData)
{
if (iBuffersProcessed == iBuffersFilled)
{
alGetSourcei(uiSource, AL_BUFFERS_PROCESSED, &iBuffersProcessed);
iBuffersFilled = 0;
}
unsigned int numSamples = m_mixer->GetNumSamples();
if (iBuffersProcessed && (numSamples >= OAL_THRESHOLD))
{
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);
m_mixer->Mix(realtimeBuffer, numSamples);
alBufferData(uiBufferTemp[iBuffersFilled], AL_FORMAT_STEREO16, realtimeBuffer, numSamples * 4, ulFrequency);
alSourceQueueBuffers(uiSource, 1, &uiBufferTemp[iBuffersFilled]);
iBuffersFilled++;
if (iBuffersFilled == OAL_NUM_BUFFERS)
alSourcePlay(uiSource);
}
else if (numSamples >= OAL_THRESHOLD)
{
ALint state = 0;
alGetSourcei(uiSource, AL_SOURCE_STATE, &state);
if (state == AL_STOPPED)
alSourcePlay(uiSource);
}
soundSyncEvent.Wait();
}
}
#endif //HAVE_OPENAL
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