/usr/include/CLAM/SpectralAnalysis.hxx is in libclam-dev 1.4.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* 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 2 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SpectralAnalysis__
#define __SpectralAnalysis__
//Uncomment this line if you want to use Ooura fft instead of fftw
//#define CLAM_OOURA
#include "WindowGenerator.hxx"
#include "CircularShift.hxx"
#include "SpectralAnalysisConfig.hxx"
#include "Audio.hxx"
#include "AudioMultiplier.hxx"
#include "ProcessingComposite.hxx"
#include "FFT.hxx"
#include "Spectrum.hxx"
#include "AudioInPort.hxx"
#include "OutPort.hxx"
namespace CLAM {
class Frame;
class Segment;
class ProcessingConfig;
/** Processing class for performing a STFT. Its main functionality is to obtain
* a spectrum out of an incoming audio signal, applying windowing, circular shift
* and zero padding. Its different
*/
class SpectralAnalysis:public ProcessingComposite
{
public:
// Processing Object compliance methods.
const char *GetClassName() const {return "SpectralAnalysis";}
SpectralAnalysis(SpectralAnalysisConfig& config);
SpectralAnalysis();
~SpectralAnalysis();
const ProcessingConfig &GetConfig() const {return mConfig;}
/** Supervised mode execution */
bool Do(void);
/** Basic unsupervised Do method. It returns an output spectrum using an input audio frame*/
bool Do(const Audio& in,Spectrum& outSp);
/** Unsupervised Do method that uses a CLAM Frame as input and output. AudioFrame attribute of
* the frame is used as input and Spectrum as output.
* @see Frame */
bool Do(Frame& in);
/** Unsupervised Do method that uses an incoming CLAM Segment as input and
* output. It processes the frame that is indicated by the current frame index
* in the segment and increments that index.
* @see Segment*/
bool Do(Segment& in);
private:
/** Internal Configuration data */
SpectralAnalysisConfig mConfig;
// The internal Processing Objects
/** Child Window Generator Processing
* @see WindowGenerator
*/
WindowGenerator mPO_WinGen;
/** Child Audio Multiplier Processing for doing the windowing
* @see AudioMultiplier
*/
AudioMultiplier mPO_AProduct;
/** Child Circular Shift Processing
* @see CircularShift
*/
CircularShift mPO_CShift;
/** Child FFT Processing
* @see FFT
*/
FFT mPO_FFT;
/** Internal Circular Buffer Processing for overlap
* @see AudioCircularBuffer */
// AudioCircularBuffer mCircularBuffer;
//Internal DataObjects
/** Audio internal object that will be processed through the FFT*/
Audio mAudioFrame;
/** Window internal object that will be multiplied with incoming audio frame*/
Audio mWindow;
/** spectrum object only used for initializing frames */
Spectrum mSpec;
// Internal convenience methods.
void AttachChildren();
bool ConfigureChildren();
void ConfigureData();
/** Configuration method */
bool ConcreteConfigure(const ProcessingConfig&);
/** Ports */
AudioInPort mInput;
OutPort<Spectrum> mOutput;
};
} //namespace
#endif
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