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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 <CoreServices/CoreServices.h>
#include "CoreAudioSoundStream.h"
OSStatus CoreAudioSound::callback(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber,
UInt32 inNumberFrames, AudioBufferList *ioData)
{
for (UInt32 i = 0; i < ioData->mNumberBuffers; i++)
((CoreAudioSound *)inRefCon)->m_mixer->
Mix((short *)ioData->mBuffers[i].mData,
ioData->mBuffers[i].mDataByteSize / 4);
return noErr;
}
CoreAudioSound::CoreAudioSound(CMixer *mixer) : SoundStream(mixer)
{
}
CoreAudioSound::~CoreAudioSound()
{
}
bool CoreAudioSound::Start()
{
OSStatus err;
AURenderCallbackStruct callback_struct;
AudioStreamBasicDescription format;
ComponentDescription desc;
Component component;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
component = FindNextComponent(NULL, &desc);
if (component == NULL) {
ERROR_LOG(AUDIO, "error finding audio component");
return false;
}
err = OpenAComponent(component, &audioUnit);
if (err != noErr) {
ERROR_LOG(AUDIO, "error opening audio component");
return false;
}
FillOutASBDForLPCM(format, m_mixer->GetSampleRate(),
2, 16, 16, false, false, false);
err = AudioUnitSetProperty(audioUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &format,
sizeof(AudioStreamBasicDescription));
if (err != noErr) {
ERROR_LOG(AUDIO, "error setting audio format");
return false;
}
callback_struct.inputProc = callback;
callback_struct.inputProcRefCon = this;
err = AudioUnitSetProperty(audioUnit,
kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0, &callback_struct,
sizeof callback_struct);
if (err != noErr) {
ERROR_LOG(AUDIO, "error setting audio callback");
return false;
}
err = AudioUnitSetParameter(audioUnit,
kHALOutputParam_Volume,
kAudioUnitParameterFlag_Output, 0,
m_volume / 100., 0);
if (err != noErr)
ERROR_LOG(AUDIO, "error setting volume");
err = AudioUnitInitialize(audioUnit);
if (err != noErr) {
ERROR_LOG(AUDIO, "error initializing audiounit");
return false;
}
err = AudioOutputUnitStart(audioUnit);
if (err != noErr) {
ERROR_LOG(AUDIO, "error starting audiounit");
return false;
}
return true;
}
void CoreAudioSound::SetVolume(int volume)
{
OSStatus err;
m_volume = volume;
err = AudioUnitSetParameter(audioUnit,
kHALOutputParam_Volume,
kAudioUnitParameterFlag_Output, 0,
volume / 100., 0);
if (err != noErr)
ERROR_LOG(AUDIO, "error setting volume");
}
void CoreAudioSound::SoundLoop()
{
}
void CoreAudioSound::Stop()
{
OSStatus err;
err = AudioOutputUnitStop(audioUnit);
if (err != noErr)
ERROR_LOG(AUDIO, "error stopping audiounit");
err = AudioUnitUninitialize(audioUnit);
if (err != noErr)
ERROR_LOG(AUDIO, "error uninitializing audiounit");
err = CloseComponent(audioUnit);
if (err != noErr)
ERROR_LOG(AUDIO, "error closing audio component");
}
void CoreAudioSound::Update()
{
}
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