AmBufferedAudio.h

00001 /*
00002  * $Id: AmAudio.h 711 2008-02-10 18:52:44Z sayer $
00003  *
00004  * Copyright (C) 2002-2003 Fhg Fokus
00005  *
00006  * This file is part of sems, a free SIP media server.
00007  *
00008  * sems is free software; you can redistribute it and/or modify
00009  * it under the terms of the GNU General Public License as published by
00010  * the Free Software Foundation; either version 2 of the License, or
00011  * (at your option) any later version
00012  *
00013  * For a license to use the ser software under conditions
00014  * other than those described here, or to purchase support for this
00015  * software, please contact iptel.org by e-mail at the following addresses:
00016  *    info@iptel.org
00017  *
00018  * sems is distributed in the hope that it will be useful,
00019  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00020  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00021  * GNU General Public License for more details.
00022  *
00023  * You should have received a copy of the GNU General Public License 
00024  * along with this program; if not, write to the Free Software 
00025  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00026  */
00027 
00028 #ifndef _AmBufferedAudio_H
00029 #define _AmBufferedAudio_H
00030 
00031 #include "AmAudio.h"
00035 class AmBufferedAudio : public AmAudio {
00036 
00037   unsigned char* output_buffer;
00038   size_t output_buffer_size, low_buffer_thresh, full_buffer_thresh;
00039   size_t r, w;
00040 
00041   bool eof;
00042   int err_code;
00043 
00044   void input_get_audio(unsigned int user_ts);
00045   inline void allocateBuffer();
00046   inline void releaseBuffer();
00047 
00048  protected:
00049   AmBufferedAudio(size_t output_buffer_size, size_t low_buffer_thresh, size_t full_buffer_thresh);
00050   ~AmBufferedAudio();
00051   
00052   void clearBufferEOF();
00053   void setBufferSize(size_t _output_buffer_size, size_t _low_buffer_thresh, size_t _full_buffer_thresh);
00054 
00055  public:
00056   virtual int get(unsigned int user_ts, unsigned char* buffer, unsigned int nb_samples);
00057 
00058 };
00059 #endif
00060 
00061 // Local Variables:
00062 // mode:C++
00063 // End:
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