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aflibAudioSpectrum.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 _AFLIBAUDIOSPECTRUM_H_
#define _AFLIBAUDIOSPECTRUM_H_

#include "aflibAudio.h"
#include "aflibFFT.h"

#define MAX_ARRAY_SIZE 1024

typedef void (*powermeter_callback)(double *);
typedef void (*spectrum_callback)(int, double *);

class aflibAudioSpectrum : public aflibAudio {

public:

   // Available contructors and destructors
   aflibAudioSpectrum(aflibAudio& audio);
   ~aflibAudioSpectrum();

   bool
   setParameters(
      int num_samples,
      int resp_per_sec,
      int channels);

   void
   setPowerMeterCallback( powermeter_callback func_ptr);

   void
   setAudioSpectrumCallback( spectrum_callback func_ptr);

   void
   setInputConfig(const aflibConfig& cfg);

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

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

private:

   aflibAudioSpectrum();

   aflibAudioSpectrum(const aflibAudioSpectrum& op);

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

   void
   allocateMemory();

aflibFFT  _fft;
int    _num_samples;
int    _responses;
int    _channels;
int    _samples_between_responses;
int    _samples_counter;
double  * _in_real;
double  * _power_out;
double  * _spec_out;
powermeter_callback  _pm_func_ptr;
spectrum_callback  _spectrum_func_ptr;

};


#endif

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