代码搜索：如何学习 FFt？
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mak fft.mak
# Generated by the VisualDSP++ IDDE
# Note: Any changes made to this Makefile will be lost the next time the
# matching project file is loaded into the IDDE. If you wish to preserve
# changes,
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ldf fft.ldf
/****************************************************************************
** $TITLE: FFT.LDF$
** FFT.LDF
** ---------
** Sets up the memory map for the FFT demo.
**
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c fft.c
/****************************************************************************
** $TITLE: FFT.C$
** FFT.C
** ---------
** Brings data in from the codec, and runs it through
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mak fft.mak
# Generated by the VisualDSP++ IDDE
# Note: Any changes made to this Makefile will be lost the next time the
# matching project file is loaded into the IDDE. If you wish to preserve
# changes,
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pcf fft.pcf
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c fft.c
#include
#include
#include
#define PI 3.14159265358979323846
struct COMPLEX
{
float re;
float im;
} cplx , * Hfield , * S , * R , * w;
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cpp fft.cpp
#include "dip.h"
void TDipWindow::add(COMPLEX *a,COMPLEX *b,COMPLEX *ret)
{
ret->re = a->re + b->re;
ret->im = a->im + b->im;
}
void TDipWindow::sub(COMPLEX *a,COMPLEX *b,COMPLEX *ret)
{
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cpp fft.cpp
/**********************************************************************
FFT.cpp
Dominic Mazzoni
September 2000
This file contains a few FFT routines, including a real-FFT
routine that is