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fixed color gradient, removed and added debug code

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This commit is contained in:
Ahmet Inan 2015-01-08 15:22:37 +01:00
parent 88240631d3
commit 749972d0e5
1 changed files with 9 additions and 14 deletions
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23
app/src/main/rs/stft.rsh
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@ -26,15 +26,9 @@ limitations under the License.
static inline uchar4 rainbow(float v)
{
#if 1
float r = clamp(4.0f * v - 2.0f, 0.0f, 1.0f);
float g = clamp(2.0f - 4.0f * fabs(v - 0.5f), 0.0f, 1.0f);
float b = clamp(2.0f - 4.0f * v, 0.0f, 1.0f);
#else
float r = v;
float g = v;
float b = v;
#endif
float r = v * clamp(4.0f * v - 2.0f, 0.0f, 1.0f);
float g = v * clamp(1.0f - 4.0f * fabs(v - 0.5f), 0.0f, 1.0f);
float b = v * clamp(2.0f - 4.0f * v, 0.0f, 1.0f);
return rgb(255.0f * sqrt(r), 255.0f * sqrt(g), 255.0f * sqrt(b));
}
@ -60,14 +54,15 @@ static void spectrum_analyzer(float amplitude)
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 = 10.0f * log10(max(0.000001f, power));
float v = clamp(60.0f + dB) / 60.0f, 0.0f, 1.0f);
#else
float v = power;
#endif
float v = clamp((60.0f + dB) / 60.0f, 0.0f, 1.0f);
spectrum_buffer[i] = rainbow(v);
}
#if 0
for (int j = spectrum_height / 2; j < spectrum_height; ++j)
for (int i = 0; i < spectrum_width; ++i)
spectrum_buffer[spectrum_width * j + i] = rainbow((float)i / spectrum_width);
#endif
}
}