/home/marsyas/marsyas/src/marsyas/WavFileSink.h

/*
** Copyright (C) 1998-2010 George Tzanetakis <gtzan@cs.uvic.ca>
**  
** 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_WAVFILESINK_H
#define MARSYAS_WAVFILESINK_H

#include "common_header.h"
#include "SoundFileSink.h"
#include "WavFileSource.h"
#include "FileName.h"
#include "AbsSoundFileSink.h"

namespace Marsyas
{
    struct wavhdr {
        char riff[4];           // "RIFF"
        signed int file_size;      // in bytes

        char wave[4];           // "WAVE"

        char fmt[4];            // "fmt "
        signed int chunk_size;     // in bytes (16 for PCM)
        signed short format_tag;     // 1=PCM, 2=ADPCM, 3=IEEE float, 6=A-Law, 7=Mu-Law
        signed short num_chans;      // 1=mono, 2=stereo
        signed int sample_rate;
        signed int bytes_per_sec;
        signed short bytes_per_samp; // 2=16-bit mono, 4=16-bit stereo
        signed short bits_per_samp;
        char data[4];           // "data"
        signed int data_length;    // in bytes
    };

    class WavFileSink: public AbsSoundFileSink
    {
    private:
        wavhdr hdr_;
        unsigned long written_;
        long fpos_;

        short * sdata_;
        unsigned char *cdata_;
  
        std::string filename_;
        FILE *sfp_;
        long sfp_begin_;  
        mrs_natural nChannels_;

        unsigned long ByteSwapLong(unsigned long nLongNumber);
        unsigned short ByteSwapShort (unsigned short nValue);

        void addControls();
        void myUpdate(MarControlPtr sender);

    public:
        WavFileSink(std::string name);
        ~WavFileSink();
        MarSystem* clone() const;  
  
        void putLinear16Swap(realvec& slice);
        void putHeader(std::string filename);
        bool checkExtension(std::string filename);
        void myProcess(realvec& in, realvec& out);
    };

}//namespace Marsyas

#endif    /* !MARSYAS_WAVFILESINK_H */ 

    

    
    

---