/usr/include/CLAM/IFFT_ooura.hxx is in libclam-dev 1.4.0-5.2.
This file is owned by root:root, with mode 0o644.
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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 _IFFT_ooura_
#define _IFFT_ooura_
#include "IFFT_base.hxx"
#include "DataTypes.hxx"
#include "SpecTypeFlags.hxx"
#include "ErrDynamicType.hxx"
namespace CLAM {
struct IFFTConfig;
class Spectrum;
class Audio;
class ProcessingConfig;
/** Implementation of the IFFT using the algorithm from Takuya OOURA
* in C.
* @see <a HREF="http://momonga.t.u-tokyo.ac.jp/~ooura/fft.html">
* Ooura's IFFT Homepage</a>
*/
class IFFT_ooura: public IFFT_base
{
/** Internal bit reversal, cos & sin tables */
int *ip;
TData *w;
/** Internal output buffer */
TData* ifftbuffer;
/** Auxiliary flags structure, used to add the complex attribute. */
SpecTypeFlags mComplexflags;
/* IFFT possible execution states.
*/
typedef enum {
sComplex, // We just need to read the complex array.
sOther // The complex array is not present.
} IFFTState;
/** Execution state of the IFFT object. It includes I/O
prototypes state */
IFFTState mState;
bool IFFTConfigure();
/** Configuration change method
*/
bool ConcreteConfigure(const ProcessingConfig&);
// Memory Management (for work areas and stuff)
void ReleaseMemory();
void SetupMemory();
// Output conversions
void ComplexToIFFTOoura(const Spectrum &in) const;
void OtherToIFFTOoura(const Spectrum &in) const;
inline void CheckTypes(const Spectrum& in, const Audio &out) const;
public:
IFFT_ooura();
IFFT_ooura(const IFFTConfig &c) throw(ErrDynamicType);
~IFFT_ooura();
const char * GetClassName() const {return "IFFT_ooura";}
// Execution methods
bool Do();
bool Do(const Spectrum& in, Audio &out) const;
// Port interfaces.
bool SetPrototypes(const Spectrum& in,const Audio &out);
bool SetPrototypes();
bool UnsetPrototypes();
bool MayDisableExecution() const {return true;}
};
};//namespace CLAM
#endif // _IFFT_numrec_
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