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69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
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//Copyright+LGPL
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//-----------------------------------------------------------------------------------------------------------------------------------------------
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// Copyright 2000-2013 Makoto Mori, Nobuyuki Oba
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//-----------------------------------------------------------------------------------------------------------------------------------------------
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// This file is part of MMTTY.
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// MMTTY is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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// MMTTY is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public License along with MMTTY. If not, see
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// <http://www.gnu.org/licenses/>.
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//-----------------------------------------------------------------------------------------------------------------------------------------------
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#ifndef FFT_H
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#define FFT_H
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//---------------------------------------------------------------------------
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#define FFT_BUFSIZE 2048
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#define SQRT_FFT_SIZE 46//sqrt(2048)
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class CFFT
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{
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public:
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CFFT();
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virtual ~CFFT();
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void InitFFT(void);
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int m_CollectFFT;
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void CollectFFT(double *lp, int size);
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void CalcFFT(int size, double gain, int stg);
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void TrigFFT(void);
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void ClearBuf(void){
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memset(m_fft, 0, sizeof(m_fft));
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memset(pStgBuf, 0, sizeof(double[FFT_BUFSIZE]));
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TrigFFT();
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};
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int m_FFTDIS;
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int m_fft[2048];
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private:
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void Calc(double * InBuf, int size, double gain, int stg, int* OutBuf);
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BOOL m_StgSW;
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int m_StgSize;
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double m_StgScale;
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double m_StgK;
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int m_CollectFlag;
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int m_CollectFFTCount;
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double *m_CollectFFTBuf;
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double *m_tSinCos;
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double *m_tWindow;
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double *pStgBuf;
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int *m_Work;
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void makewt(int nw, int *ip, double *w);
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void makect(int nc, int *ip, double *c);
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void bitrv2(int n, int *ip, double *a);
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void cftfsub(int n, double *a, double *w);
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void rftfsub(int n, double *a, int nc, double *c);
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void cft1st(int n, double *a, double *w);
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void cftmdl(int n, int l, double *a, double *w);
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};
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#endif
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