mirror of
https://github.com/kanjitalk755/macemu.git
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87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/*
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*
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* This is based on Apple example software AudioBackEnd.cpp
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*
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* Copyright © 2004 Apple Computer, Inc., All Rights Reserved
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* Original Apple code modified by Daniel Sumorok
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*
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __AudioBackEnd_H__
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#define __AudioBackEnd_H__
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#define checkErr( err) \
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if(err) {\
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OSStatus error = static_cast<OSStatus>(err);\
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fprintf(stderr, "AudioBackEnd Error: %ld -> %s: %d\n", error,\
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__FILE__, \
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__LINE__\
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);\
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fflush(stdout);\
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}
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#include <CoreAudio/CoreAudio.h>
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#include <AudioToolbox/AudioToolbox.h>
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#include <AudioUnit/AudioUnit.h>
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#include <pthread.h>
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#include "AudioDevice.h"
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typedef void (*playthruCallback)(void *arg);
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class AudioBackEnd {
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public:
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AudioBackEnd(int bitsPerSample, int numChannels, int sampleRate);
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~AudioBackEnd();
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OSStatus Init();
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OSStatus Start();
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OSStatus Stop();
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Boolean IsRunning();
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void setCallback(playthruCallback func, void *arg);
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UInt32 BufferSizeFrames();
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int sendAudioBuffer(const void *buffer, int numFrames);
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private:
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OSStatus SetupGraph();
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OSStatus CallbackSetup();
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OSStatus SetupBuffers();
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static OSStatus OutputProc(void *inRefCon,
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AudioUnitRenderActionFlags *ioActionFlags,
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const AudioTimeStamp *inTimeStamp,
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UInt32 inBusNumber,
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UInt32 inNumberFrames,
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AudioBufferList * ioData);
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AudioDevice mOutputDevice;
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AUGraph mGraph;
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AUNode mOutputNode;
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AudioUnit mOutputUnit;
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int mBitsPerSample;
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int mSampleRate;
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int mNumChannels;
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playthruCallback mCallback;
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void *mCallbackArg;
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UInt32 mBufferSizeFrames;
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UInt32 mFramesProcessed;
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UInt8 *mAudioBuffer;
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UInt32 mAudioBufferWriteIndex;
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UInt32 mAudioBufferReadIndex;
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UInt32 mBytesPerFrame;
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UInt32 mAudioBufferSize;
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};
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#endif //__AudioBackEnd_H__
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