mirror of
https://github.com/dolphin-emu/dolphin.git
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fdd532356a
of going through an intermediate thread and buffer. This seems to be how Core Audio is meant to be used, although I still haven't read the manual. Indeed, sound on OS X works perfectly now. git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5555 8ced0084-cf51-0410-be5f-012b33b47a6e
144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "CoreAudioSoundStream.h"
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OSStatus callback(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags,
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const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber,
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UInt32 inNumberFrames, AudioBufferList *ioData)
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{
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for (UInt32 i = 0; i < ioData->mNumberBuffers; i++)
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{
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((CoreAudioSound *)inRefCon)-> \
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RenderSamples(ioData->mBuffers[i].mData,
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ioData->mBuffers[i].mDataByteSize);
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}
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return noErr;
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}
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void CoreAudioSound::RenderSamples(void *target, UInt32 size)
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{
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m_mixer->Mix((short *)target, size / 4);
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}
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CoreAudioSound::CoreAudioSound(CMixer *mixer) : SoundStream(mixer)
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{
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}
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CoreAudioSound::~CoreAudioSound()
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{
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}
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bool CoreAudioSound::Start()
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{
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OSStatus err;
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UInt32 enableIO;
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AURenderCallbackStruct callback_struct;
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AudioStreamBasicDescription format;
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = kAudioUnitSubType_HALOutput;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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Component component = FindNextComponent(NULL, &desc);
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if (component == NULL) {
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printf("error finding audio component\n");
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return false;
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}
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err = OpenAComponent(component, &audioUnit);
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if (err != noErr) {
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printf("error opening audio component\n");
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return false;
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}
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enableIO = 1;
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AudioUnitSetProperty(audioUnit,
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kAudioOutputUnitProperty_EnableIO,
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kAudioUnitScope_Output, 0, &enableIO,
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sizeof enableIO);
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FillOutASBDForLPCM(format, m_mixer->GetSampleRate(),
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2, 16, 16, false, false, false);
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err = AudioUnitSetProperty(audioUnit,
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kAudioUnitProperty_StreamFormat,
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kAudioUnitScope_Input, 0, &format,
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sizeof(AudioStreamBasicDescription));
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if (err != noErr) {
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printf("error setting audio format\n");
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return false;
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}
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callback_struct.inputProc = callback;
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callback_struct.inputProcRefCon = this;
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err = AudioUnitSetProperty(audioUnit,
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kAudioUnitProperty_SetRenderCallback,
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kAudioUnitScope_Input, 0, &callback_struct,
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sizeof callback_struct);
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if (err != noErr) {
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printf("error setting audio callback\n");
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return false;
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}
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err = AudioUnitInitialize(audioUnit);
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if (err != noErr) {
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printf("error initializing audiounit\n");
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return false;
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}
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err = AudioOutputUnitStart(audioUnit);
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if (err != noErr) {
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printf("error starting audiounit\n");
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return false;
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}
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return true;
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}
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void CoreAudioSound::SoundLoop()
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{
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}
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void CoreAudioSound::Stop()
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{
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OSStatus err;
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err = AudioOutputUnitStop(audioUnit);
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if (err != noErr) {
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printf("error stopping audiounit\n");
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return;
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}
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err = AudioUnitUninitialize(audioUnit);
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if (err != noErr) {
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printf("error uninitializing audiounit\n");
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return;
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}
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err = CloseComponent(audioUnit);
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if (err != noErr) {
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printf("error while closing audio component\n");
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return;
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}
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}
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void CoreAudioSound::Update()
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{
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}
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