FFT_ooura.hxx

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00001 /*
00002  * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
00003  *                         UNIVERSITAT POMPEU FABRA
00004  *
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  *
00020  */
00021 
00022 
00023 #ifndef _FFT_ooura_
00024 #define _FFT_ooura_
00025 
00026 #include "FFT_base.hxx"
00027 #include "DataTypes.hxx"
00028 #include "SpecTypeFlags.hxx"
00029 #include "ErrDynamicType.hxx"
00030 
00031 namespace CLAM {
00032 
00033         struct FFTConfig;
00034         class Spectrum;
00035         class Audio;
00036         class ProcessingConfig;
00037         class IFFT_ooura;
00038 
00044         class FFT_ooura: public FFT_base
00045         {
00046           
00048                 int *ip;
00049                 TData *w;
00050 
00051                 bool FFTConfigure();
00052 
00055                 bool ConcreteConfigure(const ProcessingConfig&);
00056 
00057                 // Memory Management (for work areas and stuff)
00058 
00059                 void ReleaseMemory();
00060 
00061                 void SetupMemory();
00062 
00063                 // Output conversions
00064 
00065                 void ToComplex(Spectrum &out);
00066                 void ToOther(Spectrum &out);
00067 
00068         public:
00069                 // FFTOOURA original functions, modified to accept
00070                 // TData instead of double
00071                 static void rdft(int n, int isgn, TData *a, int *ip, TData *w);
00072                 static void makewt(int nw, int *ip, TData *w);
00073                 static void makect(int nc, int *ip, TData *c);
00074                 static void bitrv2(int n, int *ip, TData *a);
00075                 static void cftfsub(int n, TData *a, TData *w);
00076                 static void cftbsub(int n, TData *a, TData *w);
00077                 static void rftfsub(int n, TData *a, int nc, TData *c);
00078                 static void rftbsub(int n, TData *a, int nc, TData *c);
00079                 static void cft1st(int n, TData *a, TData *w);
00080                 static void cftmdl(int n, int l, TData *a, TData *w);
00081 
00082         
00083 
00084                 FFT_ooura();
00085 
00086                 FFT_ooura(const FFTConfig &c) throw(ErrDynamicType);
00087 
00088                 ~FFT_ooura();
00089 
00090                 const char * GetClassName() const {return "FFT_ooura";}
00091 
00092                 // Execution methods
00093 
00094                 bool Do();
00095 
00096                 bool Do(const Audio& in, Spectrum &out);
00097 
00098                 
00099                 bool MayDisableExecution() const {return true;}
00100 
00101         };
00102 
00103 };//namespace CLAM
00104 
00105 #endif // _FFT_numrec_
00106 
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