this repo has no description
back to 1024 and cleaner, for now
+8
-60
+5
-55
src/ext/fft.c
+5
-55
src/ext/fft.c
···
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_samples[i] = 2.0f * sqrtf(out[i].r * out[i].r + out[i].i * out[i].i) * scaling * fAmplification;
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}
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}
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float fFFTSmoothingFactor = 0.9;
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for ( int i = 0; i < FFT_SIZE; i++ )
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{
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_samples[i] = _samples[i] * fFFTSmoothingFactor + (1 - fFFTSmoothingFactor) * _samples[i];
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}
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return true;
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}
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double tic_api_fft(tic_mem* memory, s32 freq)
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{
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return fftData[freq];
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}
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// float fFFTSmoothingFactor = 0.9f; // higher value, smoother FFT
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// static float fftDataSmoothed[FFT_SIZE] = {0}; // Initialize the array with zeros
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// static const float fPeakMinValue = 0.01f;
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// static const float fPeakSmoothing = 0.995f;
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// static float fPeakSmoothValue = 0.0f;
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// double tic_api_fft(tic_mem* memory, s32 freq/*, bool bPeakNormalization, bool bSmoothing*/)
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// {
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// u32 interval = FFT_SIZE / 256 / 2; // the 2 is to discard super high frequencies, they suck
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// freq = freq * interval;
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// freq = fmin(freq, FFT_SIZE);
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// freq = fmax(freq, 0);
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// bool bPeakNormalization = true;
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// bool bSmoothing = true;
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// if (bPeakNormalization) {
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// float peakValue = fPeakMinValue;
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// for (int i = freq; i < freq + interval; ++i) {
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// float val = 2.0f * sqrtf(fftBuf[i].r * fftBuf[i].r + fftBuf[i].i * fftBuf[i].i);
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// if (val > peakValue) {
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// peakValue = val;
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// }
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// }
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// if (peakValue > fPeakSmoothValue) {
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// fPeakSmoothValue = peakValue;
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// }
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// if (peakValue < fPeakSmoothValue) {
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// fPeakSmoothValue = fPeakSmoothValue * fPeakSmoothing + peakValue * (1 - fPeakSmoothing);
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// }
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// if (fPeakSmoothValue > 0.0f) {
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// fAmplification = 1.0f / fPeakSmoothValue;
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// } else {
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// fAmplification = 1.0f;
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// }
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// }
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// static const float scaling = 1.0f / (float)FFT_SIZE;
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// float res = 0;
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// for (int i = freq; i < freq + interval; ++i) {
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// float val = 2.0f * sqrtf(fftBuf[i].r * fftBuf[i].r + fftBuf[i].i * fftBuf[i].i) * scaling * fAmplification;
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// if (bSmoothing) {
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// if (i < FFT_SIZE) {
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// fftDataSmoothed[i] = fftDataSmoothed[i] * fFFTSmoothingFactor + (1 - fFFTSmoothingFactor) * val;
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// res += fftDataSmoothed[i];
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// }
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// } else {
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// res += val;
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// }
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// }
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// return res;
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// }
-3
src/ext/fft.h
-3
src/ext/fft.h
+1
-1
src/fftdata.c
+1
-1
src/fftdata.c