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Added an sse enabled mixed-radix-fft implementation and a menu/view/{narrow,broaden} spectrum item which adjusts the spectrogram window size

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This commit is contained in:
clayton.otey
2011-07-02 18:42:38 +00:00
parent a17e741abc
commit df9865f26a
19 changed files with 6679 additions and 3268 deletions
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61
src/WaveClip.cpp
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@@ -35,6 +35,7 @@ drawing). Cache's the Spectrogram frequency samples.
#include "Envelope.h"
#include "Resample.h"
#include "Project.h"
#include "Experimental.h"
#include <wx/listimpl.cpp>
WX_DEFINE_LIST(WaveClipList);
@@ -290,6 +291,29 @@ void ComputeSpectrumUsingRealFFTf(float *buffer, HFFT hFFT, float *window, int l
}
#endif // EXPERIMENTAL_USE_REALFFTF
#ifdef EXPERIMENTAL_USE_MIXEDRADIX_FFT
#include "FFTMixedRadix.h"
void ComputeSpectrumUsingMixedRadixFFT(float *in, float *out, int windowSize, float *window, MixedRadixFFTFunc FFTFunc)
{
for(int i=0; i<windowSize; i++) {
in[i] *= window[i];
}
FFTFunc(in);
int half = windowSize>>1;
for(int k=0; k<half; k++) {
int k2 = k<<1;
float r = in[k2];
float i = in[k2+1];
float p = r*r + i*i;
if(p <= 0) {
out[k] = -160.0f;
} else {
out[k] = 10.0f*log10f(p);
}
}
}
#endif
WaveClip::WaveClip(DirManager *projDirManager, sampleFormat format, int rate)
{
mOffset = 0;
@@ -718,9 +742,9 @@ bool WaveClip::GetWaveDisplay(float *min, float *max, float *rms,int* bl,
}
bool WaveClip::GetSpectrogram(float *freq, sampleCount *where,
int numPixels,
double t0, double pixelsPerSecond,
bool autocorrelation)
int numPixels,
double t0, double pixelsPerSecond,
bool autocorrelation)
{
int minFreq = gPrefs->Read(wxT("/Spectrum/MinFreq"), 0L);
int maxFreq = gPrefs->Read(wxT("/Spectrum/MaxFreq"), 8000L);
@@ -764,6 +788,30 @@ bool WaveClip::GetSpectrogram(float *freq, sampleCount *where,
}
#endif // EXPERIMENTAL_USE_REALFFTF
#ifdef EXPERIMENTAL_USE_MIXEDRADIX_FFT
if((mWindowType != windowType) || (mWindowSize != windowSize) || (mWindow == NULL) ) {
mWindowType = windowType;
mWindowSize = windowSize;
if(mWindow != NULL) delete[] mWindow;
mWindow = new float[mWindowSize];
for(int i=0; i<windowSize; i++) {
mWindow[i]=1.0;
}
WindowFunc(mWindowType, mWindowSize, mWindow);
// Scale the window function to give 0dB spectrum for 0dB sine tone
double ws=0;
for(int i=0; i<windowSize; i++) {
ws += mWindow[i];
}
if(ws > 0) {
ws = 2.0/ws;
for(int i=0; i<windowSize; i++) {
mWindow[i] *= ws;
}
}
}
#endif
if (mSpecCache &&
mSpecCache->minFreqOld == minFreq &&
mSpecCache->maxFreqOld == maxFreq &&
@@ -867,6 +915,9 @@ bool WaveClip::GetSpectrogram(float *freq, sampleCount *where,
}
}
#ifdef EXPERIMENTAL_USE_MIXEDRADIX_FFT
MixedRadixFFTFunc FFTFunc = GetMixedRadixFFTFunc(windowSize);
#endif
for (x = 0; x < mSpecCache->len; x++)
if (recalc[x]) {
@@ -925,7 +976,11 @@ bool WaveClip::GetSpectrogram(float *freq, sampleCount *where,
mRate, &mSpecCache->freq[half * x],
autocorrelation, windowType);
} else {
#ifdef EXPERIMENTAL_USE_MIXEDRADIX_FFT
ComputeSpectrumUsingMixedRadixFFT(buffer, &mSpecCache->freq[half * x], mWindowSize, mWindow, FFTFunc);
#else
ComputeSpectrumUsingRealFFTf(buffer, hFFT, mWindow, mWindowSize, &mSpecCache->freq[half * x]);
#endif
}
#else // EXPERIMENTAL_USE_REALFFTF
ComputeSpectrum(buffer, windowSize, windowSize,