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111 lines
1.8 KiB
C++
111 lines
1.8 KiB
C++
#include "KissFFTTest.h"
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#define N 8
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#define CD 1
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void print_buffs(const kiss_fft_cpx* sin, const kiss_fft_cpx* sout, int n)
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{
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char s[2048];
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for(int i=0; i<n; i++)
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{
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sprintf(s, "sin[%u]: r = %lf i = %lf sout: r = %lf i = %lf",i,sin[i].r,sin[i].i,sout[i].r,sout[i].i);
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RLOG(s);
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}
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}
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KissFFTTest::KissFFTTest()
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{
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CtrlLayout(*this, "Window title");
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#if _DIRECT_KISSFFT_MEANS
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kiss_fft_cpx sin[N];
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kiss_fft_cpx sout[N];
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for(int i=0; i<N; i++)
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{
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sin[i].r = (kiss_fft_scalar)0;
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sin[i].i = (kiss_fft_scalar)0;
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}
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sin[0].r = (kiss_fft_scalar)1;
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kiss_fft_cfg st = kiss_fft_alloc(N,0,0,0);
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kiss_fft(st,sin,sout);
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kiss_fft_free(st);
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print_buffs(sin, sout, N);
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RLOG("");
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st = kiss_fft_alloc(N,1,0,0);
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kiss_fft(st,sout,sin);
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kiss_fft_free(st);
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//apply scale
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double sc = 1./N;
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for(int i = 0; i < N; i++)
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{
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sin[i].r *= sc, sin[i].i *= sc;
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}
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print_buffs(sout, sin, N);
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#else
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//USING UPP STRUCTURES
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#ifdef CD
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Vector<Complex> vt, vf;
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#else
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Vector<kiss_fft_cpx> vt, vf;
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#endif
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vt.SetCount(N); //in
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vf.SetCount(N); //out
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#ifdef CD
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vt[0] = Complex(1.);
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#else
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for(int i=0; i<N; i++)
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{ vt[i].r = (kiss_fft_scalar)0, vt[i].i = (kiss_fft_scalar)0; }
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vt[0].r = (kiss_fft_scalar)1;
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#endif
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RLOG("fw fft");
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{
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KissFFT fft(N);
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fft(vf, vt);
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}
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#ifdef CD
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DUMPC(vt);
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DUMPC(vf);
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#else
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print_buffs((const kiss_fft_cpx*)vt, (const kiss_fft_cpx*)vf, N);
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#endif
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RLOG("bw fft");
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{
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KissFFT fft(N,true);
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fft(vt, vf);
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}
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double sc = 1./N;
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#ifdef CD
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for(int i = 0; i < vt.GetCount(); i++)
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vt[i] *= sc;
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DUMPC(vf);
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DUMPC(vt);
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#else
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for(int i = 0; i < vt.GetCount(); i++)
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{ vt[i].r *= sc, vt[i].i *= sc; }
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print_buffs((const kiss_fft_cpx*)vf, (const kiss_fft_cpx*)vt, N);
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#endif
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#endif
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}
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GUI_APP_MAIN
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{
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KissFFTTest().Run();
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}
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