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audioloop.h

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    audioloop.h 1.73 KiB
    /*
     *  Copyright (C) 2005 Savoir-Faire Linux inc.
     *  Author: Yan Morin <yan.morin@savoirfairelinux.com>
     *
     *  Inspired by tonegenerator of 
     *   Laurielle Lea <laurielle.lea@savoirfairelinux.com> (2004)
     * 
     *  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 3 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 __AUDIOLOOP_H__
    #define __AUDIOLOOP_H__
    
    #include <string>
    #include "../global.h" // for int16 declaration
    
    /**
     * @author Yan Morin <yan.morin@savoirfairelinux.com>
     */
    class AudioLoop {
    public:
      AudioLoop();
      virtual ~AudioLoop();
    
      /**
       * get the next fragment of the tone
       * the function change the intern position, and will loop
       * @param nb of int16 to send
       * @return the number of int16 sent (nb*2)
       */
      int getNext(SFLDataFormat* output, int nb, short volume=100);
      void reset() { _pos = 0; }
      unsigned int getMonoSize() { return _size; }
      unsigned int getSize() { return _size; }
    
    protected:
      SFLDataFormat* _buffer;
      int _size; // number of int16 inside the buffer, not the delay
      int _pos; // current position, set to 0, when initialize
      int _sampleRate; // last samplerate
    };
    
    
    #endif // __AUDIOLOOP_H__