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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
Cokiee Shell
| Current Path : /proc/self/root/usr/include/CLAM/ |
| Current File : //proc/self/root/usr/include/CLAM/FFT_ooura.hxx |
/*
* 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;
/** Implementation of the FFT using the algorithm from Takuya OOURA
* in C.
* @see <a HREF="http://momonga.t.u-tokyo.ac.jp/~ooura/fft.html">
* Ooura's FFT Homepage</a>
*/
class FFT_ooura: public FFT_base
{
/** Internal bit reversal, cos & sin tables */
int *ip;
TData *w;
bool FFTConfigure();
/** Configuration change method
*/
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_
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