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reorganized visualisation value generation

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This commit is contained in:
Ahmet Inan 2015-01-08 14:32:35 +01:00
parent 72bc00fc62
commit 88240631d3
1 changed files with 4 additions and 3 deletions
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7
app/src/main/rs/stft.rsh
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@ -59,11 +59,12 @@ static void spectrum_analyzer(float amplitude)
spectrum_buffer[spectrum_width * j + i] = spectrum_buffer[spectrum_width * (j-1) + i];
for (int i = 0; i < spectrum_width; ++i) {
int b = (i * (radix2_N / 2)) / spectrum_width;
float power = clamp(pown(cabs(output[b]) / maximum, 2), 0.0f, 1.0f);
#if 0
float dB = 20.0f * log10(cabs(output[b]) / maximum);
float v = min(1.0f, max(0.0f, (60.0f + dB) / 60.0f));
float dB = 10.0f * log10(max(0.000001f, power));
float v = clamp(60.0f + dB) / 60.0f, 0.0f, 1.0f);
#else
float v = min(1.0f, max(0.0f, pown(cabs(output[b]) / maximum, 2)));
float v = power;
#endif
spectrum_buffer[i] = rainbow(v);
}