FFT_ooura.hxx

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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 _FFT_ooura_
#define _FFT_ooura_

#include "FFT_base.hxx"
#include "DataTypes.hxx"
#include "SpecTypeFlags.hxx"
#include "ErrDynamicType.hxx"

namespace CLAM {

        struct FFTConfig;
        class Spectrum;
        class Audio;
        class ProcessingConfig;
        class IFFT_ooura;

        class FFT_ooura: public FFT_base
        {
          
                int *ip;
                TData *w;

                bool FFTConfigure();

                bool ConcreteConfigure(const ProcessingConfig&);

                // Memory Management (for work areas and stuff)

                void ReleaseMemory();

                void SetupMemory();

                // Output conversions

                void ToComplex(Spectrum &out);
                void ToOther(Spectrum &out);

        public:
                // FFTOOURA original functions, modified to accept
                // TData instead of double
                static void rdft(int n, int isgn, TData *a, int *ip, TData *w);
                static void makewt(int nw, int *ip, TData *w);
                static void makect(int nc, int *ip, TData *c);
                static void bitrv2(int n, int *ip, TData *a);
                static void cftfsub(int n, TData *a, TData *w);
                static void cftbsub(int n, TData *a, TData *w);
                static void rftfsub(int n, TData *a, int nc, TData *c);
                static void rftbsub(int n, TData *a, int nc, TData *c);
                static void cft1st(int n, TData *a, TData *w);
                static void cftmdl(int n, int l, TData *a, TData *w);

        

                FFT_ooura();

                FFT_ooura(const FFTConfig &c) throw(ErrDynamicType);

                ~FFT_ooura();

                const char * GetClassName() const {return "FFT_ooura";}

                // Execution methods

                bool Do();

                bool Do(const Audio& in, Spectrum &out);

                
                bool MayDisableExecution() const {return true;}

        };

};//namespace CLAM

#endif // _FFT_numrec_