---

aflibAudioSampleRateCvt.h

Go to the documentation of this file.

/*
 * Copyright: (C) 1999-2001 Bruce W. Forsberg
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or any later version.
 *
 *   This library 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
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 *   Bruce Forsberg  forsberg@tns.net
 *
 */


#ifndef _AFLIBAUDIOSAMPLERATECVT_H_
#define _AFLIBAUDIOSAMPLERATECVT_H_


#include "aflibAudio.h"
#include "aflibConverter.h"


class aflibAudioSampleRateCvt : public aflibAudio {

public:

   // Available contructors and destructors
   aflibAudioSampleRateCvt(
      aflibAudio& audio, 
      double factor,
      bool  linear_interpolation = FALSE,
      bool  high_quality = FALSE,
      bool  filter_interpolation = FALSE);

   ~aflibAudioSampleRateCvt();

   void
   setFactor(
      double factor,
      double volume = 1.0);

   void
   setInputConfig(const aflibConfig& cfg);

   const char *
   getName() const { return "aflibAudioSampleRateCvt";};

   aflibStatus
   compute_segment(
      list<aflibData*>& data,
      long long position = -1) ;

   aflibData *
   process(
      aflibStatus& ret_status,
      long long position,
      int& num_samples,
      bool free_memory = TRUE) ;

   bool
   isDataSizeSupported(aflib_data_size size);

private:

   aflibAudioSampleRateCvt();

   aflibAudioSampleRateCvt(const aflibAudioSampleRateCvt& op);

   const aflibAudioSampleRateCvt&
   operator=(const aflibAudioSampleRateCvt& op);


int     _extra_sample;
int     _output_samples;
aflibConverter  * _converter;
double  _factor;
bool    _initial;
int     _init_chan;
short  *_in_array;
int     _in_array_size;
short  *_out_array;
int     _out_array_size;
double  _vol;

// These factors are used for buffering audio data so that we can get
// the audio data as a stream from the parent
long long _next_output_position;
long long _next_input_position;
int       _save_samples;
int       _prev_in_count;



};


#endif

---