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/*
Copyright (C) 2010 Grame
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; either version 2 of the License, or
(at your option) any later version.
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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __TiPhoneCoreAudioRenderer__
#define __TiPhoneCoreAudioRenderer__
#include <AudioToolbox/AudioConverter.h>
#include <AudioToolbox/AudioServices.h>
#include <AudioUnit/AudioUnit.h>
#define MAX_CHANNELS 256
#define OPEN_ERR -1
#define NO_ERR 0
typedef void (*AudioCallback) (int frames, float** inputs, float** outputs, void* arg);
class TiPhoneCoreAudioRenderer
{
private:
AudioUnit fAUHAL;
AudioCallback fAudioCallback;
void* fCallbackArg;
int fDevNumInChans;
int fDevNumOutChans;
AudioBufferList* fCAInputData;
float* fInChannel[MAX_CHANNELS];
float* fOutChannel[MAX_CHANNELS];
static OSStatus Render(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData);
static void InterruptionListener(void *inClientData, UInt32 inInterruption);
public:
TiPhoneCoreAudioRenderer(int input, int output)
:fAudioCallback(NULL), fCallbackArg(NULL), fDevNumInChans(input), fDevNumOutChans(output), fCAInputData(NULL)
{
memset(fInChannel, 0, sizeof(float*) * MAX_CHANNELS);
memset(fOutChannel, 0, sizeof(float*) * MAX_CHANNELS);
for (int i = 0; i < fDevNumInChans; i++) {
fInChannel[i] = new float[8192];
}
for (int i = 0; i < fDevNumOutChans; i++) {
fOutChannel[i] = new float[8192];
}
}
virtual ~TiPhoneCoreAudioRenderer()
{
for (int i = 0; i < fDevNumInChans; i++) {
delete[] fInChannel[i];
}
for (int i = 0; i < fDevNumOutChans; i++) {
delete[] fOutChannel[i];
}
if (fCAInputData) {
for (int i = 0; i < fDevNumInChans; i++) {
free(fCAInputData->mBuffers[i].mData);
}
free(fCAInputData);
}
}
int Open(int bufferSize, int sampleRate);
int Close();
int Start();
int Stop();
void SetAudioCallback(AudioCallback callback, void* arg)
{
fAudioCallback = callback;
fCallbackArg = arg;
}
void PerformAudioCallback(int frames)
{
if (fAudioCallback) {
fAudioCallback(frames, fInChannel, fOutChannel, fCallbackArg);
}
}
};
typedef TiPhoneCoreAudioRenderer * TiPhoneCoreAudioRendererPtr;
#endif
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