/home/marsyas/marsyas/src/marsyas/AudioSource.h

/*
** Copyright (C) 1998-2005 George Tzanetakis <gtzan@cs.cmu.edu>
**  
** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef MARSYAS_AUDIOSOURCE_H
#define MARSYAS_AUDIOSOURCE_H



#ifdef MARSYAS_AUDIOIO
#include "RtAudio.h"
#endif 

#include "MarSystem.h" 


    class RtAudio;

namespace Marsyas
{
class AudioSource:public MarSystem
{
    private:


        
    struct InputData 
    {
            mrs_realvec* ringBuffer;
            unsigned int wp;
            unsigned int rp;
            unsigned int ringBufferSize;
            unsigned int high_watermark;
            unsigned int low_watermark;
            unsigned int samplesInBuffer;
            
            AudioSource* myself;
    } idata;
        


        unsigned int getSpaceAvailable();
        unsigned int getSamplesAvailable();
    


#ifdef MARSYAS_AUDIOIO
        RtAudio* audio_;
#endif 
        int bufferSize_;
        int nBuffers_;
        int rtSrate_;
        int rtChannels_;

 
        mrs_natural ri_;
        mrs_natural nChannels_;
        mrs_natural pnChannels_;
        
        mrs_real *data_;  
        realvec ringBuffer_;
        mrs_natural ringBufferSize_;
        mrs_natural pringBufferSize_;
        mrs_natural pinObservations_;
        
        mrs_real gain_;
        
        bool isInitialized_;
        bool stopped_;
        
        void addControls();
        void myUpdate(MarControlPtr sender);
        
        void initRtAudio();
        
        void start();
        void stop();
        
        void localActivate(bool state);
        
        static int recordCallback(void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames, double streamTime, unsigned int status, void *userData);
        
    public:
        AudioSource(std::string name);
        ~AudioSource();
        MarSystem* clone() const;  
        
        void myProcess(realvec& in, realvec& out);
};
    
}//namespace Marsyas


#endif

    

    

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