qm-dsp  1.8
PhaseVocoder.h
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00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
00002 
00003 /*
00004     QM DSP Library
00005 
00006     Centre for Digital Music, Queen Mary, University of London.
00007     This file 2005-2006 Christian Landone, copyright 2013 QMUL.
00008 
00009     This program is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU General Public License as
00011     published by the Free Software Foundation; either version 2 of the
00012     License, or (at your option) any later version.  See the file
00013     COPYING included with this distribution for more information.
00014 */
00015 
00016 #ifndef PHASEVOCODER_H
00017 #define PHASEVOCODER_H
00018 
00019 class FFTReal;
00020 
00021 class PhaseVocoder  
00022 {
00023 public:
00024     PhaseVocoder(int size, int hop);
00025     virtual ~PhaseVocoder();
00026 
00039     void processTimeDomain(const double *src,
00040                            double *mag, double *phase, double *unwrapped);
00041 
00053     void processFrequencyDomain(const double *reals, const double *imags,
00054                                 double *mag, double *phase, double *unwrapped);
00055 
00062     void reset();
00063 
00064 protected:
00065     void FFTShift(double *src);
00066     void getMagnitudes(double *mag);
00067     void getPhases(double *theta);
00068     void unwrapPhases(double *theta, double *unwrapped);
00069 
00070     int m_n;
00071     int m_hop;
00072     FFTReal *m_fft;
00073     double *m_time;
00074     double *m_imag;
00075     double *m_real;
00076     double *m_phase;
00077     double *m_unwrapped;
00078 };
00079 
00080 #endif