aflibAudioSpectrum.h

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00001 /*
00002  * Copyright: (C) 1999-2001 Bruce W. Forsberg
00003  *
00004  *   This library is free software; you can redistribute it and/or
00005  *   modify it under the terms of the GNU Lesser General Public
00006  *   License as published by the Free Software Foundation; either
00007  *   version 2.1 of the License, or any later version.
00008  *
00009  *   This library is distributed in the hope that it will be useful,
00010  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  *   Lesser General Public License for more details.
00013  *
00014  *   You should have received a copy of the GNU Lesser General Public
00015  *   License along with this library; if not, write to the Free Software
00016  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00017  *
00018  *   Bruce Forsberg  forsberg@tns.net
00019  *
00020  */
00021 
00022 
00023 #ifndef _AFLIBAUDIOSPECTRUM_H_
00024 #define _AFLIBAUDIOSPECTRUM_H_
00025 
00026 #ifdef HAVE_CONFIG_H
00027 #include <config.h>
00028 #endif
00029 
00030 #include "aflibAudio.h"
00031 #include "aflibFFT.h"
00032 
00033 #define MAX_ARRAY_SIZE 1024
00034 
00035 typedef void (*powermeter_callback)(double *);
00036 typedef void (*spectrum_callback)(int, double *);
00037 
00048 class aflibAudioSpectrum : public aflibAudio {
00049 
00050 public:
00051 
00052    // Available contructors and destructors
00053    aflibAudioSpectrum(aflibAudio& audio);
00054    ~aflibAudioSpectrum();
00055 
00056    bool
00057    setParameters(
00058       int num_samples,
00059       int resp_per_sec,
00060       int channels);
00061 
00062    void
00063    setPowerMeterCallback( powermeter_callback func_ptr);
00064 
00065    void
00066    setAudioSpectrumCallback( spectrum_callback func_ptr);
00067 
00068    void
00069    setInputConfig(const aflibConfig& cfg);
00070 
00071    aflibStatus
00072    compute_segment(
00073       list<aflibData *>& data,
00074       long long position = -1) ;
00075 
00077    const char *
00078    getName() const { return "aflibAudioSpectrum";};
00079 
00080 protected:
00081     
00082    virtual void
00083    setPowerMeter(double*);
00084 
00085    virtual void
00086    setAudioSpectrum(int, double*);
00087 
00088     bool _pm;
00089     bool _spectrum;
00090 private:
00091 
00092    aflibAudioSpectrum();
00093 
00094    aflibAudioSpectrum(const aflibAudioSpectrum& op);
00095 
00096    const aflibAudioSpectrum&
00097    operator=(const aflibAudioSpectrum& op);
00098 
00099    void
00100    allocateMemory();
00101 
00102 aflibFFT  _fft;
00103 int    _num_samples;
00104 int    _responses;
00105 int    _channels;
00106 int    _samples_between_responses;
00107 int    _samples_counter;
00108 double  * _in_real;
00109 double  * _power_out;
00110 double  * _spec_out;
00111 powermeter_callback  _pm_func_ptr;
00112 spectrum_callback  _spectrum_func_ptr;
00113 
00114 };
00115 
00116 
00117 #endif

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