dolphin/Source/Core/AudioCommon/Src/CoreAudioSoundStream.cpp

167 lines
4.1 KiB
C++

// 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 "CoreAudioSoundStream.h"
typedef struct internal
{
AudioUnit audioUnit;
short realtimeBuffer[1024 * 1024];
};
OSStatus callback(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData) {
UInt32 remaining, len;
void *ptr;
AudioBuffer *data;
internal *soundStruct = (internal *)inRefCon;
data = &ioData->mBuffers[0];
len = data->mDataByteSize;
ptr = data->mData;
memcpy(ptr, soundStruct->realtimeBuffer, len);
return 0;
}
void CoreAudioSound::SoundLoop()
{
CoreAudioInit();
}
CoreAudioSound::CoreAudioSound(CMixer *mixer) : SoundStream(mixer)
{
}
CoreAudioSound::~CoreAudioSound()
{
}
bool CoreAudioSound::CoreAudioInit()
{
ComponentDescription desc;
OSStatus err;
UInt32 enableIO;
AURenderCallbackStruct callback_struct;
UInt32 shouldAllocateBuffer = 1;
AudioStreamBasicDescription format;
internal *soundStruct = (internal *)malloc(sizeof(internal));
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_HALOutput;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
Component component = FindNextComponent(NULL, &desc);
if (component == NULL)
printf("error finding component\n");
err = OpenAComponent(component, &soundStruct->audioUnit);
if (err)
printf("error opening audio component\n");
//enable output device
enableIO = 1;
AudioUnitSetProperty(soundStruct->audioUnit,
kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Output,
0,
&enableIO,
sizeof(enableIO));
AudioUnitSetProperty(soundStruct->audioUnit, kAudioUnitProperty_ShouldAllocateBuffer, kAudioUnitScope_Global, 1, &shouldAllocateBuffer, sizeof(shouldAllocateBuffer));
if (err)
printf("error while allocate audiounit buffer\n");
format.mBitsPerChannel = 16;
format.mChannelsPerFrame = 2;
format.mBytesPerPacket = sizeof(float);
format.mBytesPerFrame = sizeof(float);
format.mFormatFlags = kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved;
format.mFormatID = kAudioFormatLinearPCM;
format.mFramesPerPacket = 1;
format.mSampleRate = m_mixer->GetSampleRate();
//set format to output scope
err = AudioUnitSetProperty(soundStruct->audioUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &format, sizeof(AudioStreamBasicDescription));
if (err)
printf("error when setting output format\n");
callback_struct.inputProc = callback;
callback_struct.inputProcRefCon = soundStruct;
err = AudioUnitSetProperty(soundStruct->audioUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Global, 0, &callback_struct, sizeof(callback_struct));
if (err)
printf("error when setting output callback\n");
err = AudioUnitInitialize(soundStruct->audioUnit);
if (err)
printf("error when initiaising audiounit\n");
err = AudioOutputUnitStart(soundStruct->audioUnit);
if (err)
printf("error when stating audiounit\n");
while(!threadData)
{
m_mixer->Mix(soundStruct->realtimeBuffer, 2048);
}
return true;
}
void *coreAudioThread(void *args)
{
((CoreAudioSound *)args)->SoundLoop();
return NULL;
}
bool CoreAudioSound::Start()
{
soundSyncEvent.Init();
thread = new Common::Thread(coreAudioThread, (void *)this);
return true;
}
void CoreAudioSound::Stop()
{
delete thread;
thread = NULL;
return;
}
void CoreAudioSound::Update()
{
return;
}