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Bug971: spectrogram display

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This commit is contained in:
Paul Licameli 2015-05-25 11:05:31 -04:00
parent 1ac7d15e5c
commit 7c17d99ea5
1 changed files with 30 additions and 44 deletions
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74
src/TrackArtist.cpp
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@ -1754,9 +1754,15 @@ void TrackArtist::DrawSpectrum(WaveTrack *track,
}
}
static float sumFreqValues(float *freq, int x0, float bin0, float bin1)
inline
static float sumFreqValues(
const float *freq, int x, int half, float bin0, float bin1,
bool autocorrelation, int range, int gain)
{
const int x0 = x * half;
float value;
#if 0
// Averaging method
if (int(bin1) == int(bin0)) {
value = freq[x0+int(bin0)];
} else {
@ -1768,9 +1774,28 @@ static float sumFreqValues(float *freq, int x0, float bin0, float bin1)
value += freq[x0 + int(bin0)];
bin0 += 1.0;
}
// Do not reference past end of freq array.
if (int(bin1) >= half) {
bin1 -= 1.0;
}
value += freq[x0 + int(bin1)] * (bin1 - int(bin1));
value /= binwidth;
}
#else
// Maximum method, and no apportionment of any single bins over multiple pixel rows
// See Bug971
int bin = floor(0.5 + bin0);
const int limitBin = floor(0.5 + bin1);
value = freq[x0 + bin];
while (++bin < limitBin)
value = std::max(value, freq[x0 + bin]);
#endif
if (!autocorrelation) {
// Last step converts dB to a 0.0-1.0 range
value = (value + range + gain) / (double)range;
}
value = std::min(1.0f, std::max(0.0f, value));
return value;
}
@ -2090,37 +2115,8 @@ void TrackArtist::DrawClipSpectrum(WaveTrack *track,
float value;
if(!usePxCache) {
if (int (bin1) == int (bin0))
value = freq[half * x + int (bin0)];
else {
float binwidth= bin1 - bin0;
value = freq[half * x + int (bin0)] * (1.f - bin0 + (int)bin0);
bin0 = 1 + int (bin0);
while (bin0 < int (bin1)) {
value += freq[half * x + int (bin0)];
bin0 += 1.0;
}
// Do not reference past end of freq array.
if (int(bin1) >= half) {
bin1 -= 1.0;
}
value += freq[half * x + int (bin1)] * (bin1 - int (bin1));
value /= binwidth;
}
if (!autocorrelation) {
// Last step converts dB to a 0.0-1.0 range
value = (value + range + gain) / (double)range;
}
if (value > 1.0)
value = float(1.0);
if (value < 0.0)
value = float(0.0);
value = sumFreqValues(freq, x, half, bin0, bin1,
autocorrelation, range, gain);
clip->mSpecPxCache->values[x * mid.height + yy] = value;
}
else
@ -2138,7 +2134,6 @@ void TrackArtist::DrawClipSpectrum(WaveTrack *track,
{
unsigned char rv, gv, bv;
float value;
int x0=x*half;
#ifdef EXPERIMENTAL_FIND_NOTES
int maximas=0;
@ -2256,17 +2251,8 @@ void TrackArtist::DrawClipSpectrum(WaveTrack *track,
value = minColor;
} else
#endif //EXPERIMENTAL_FIND_NOTES
{
value=sumFreqValues(freq, x0, bin0, bin1);
if (!autocorrelation) {
// Last step converts dB to a 0.0-1.0 range
value = (value + gain + range) / (double)range;
}
}
if (value > 1.0)
value = float(1.0);
if (value < 0.0)
value = float(0.0);
value=sumFreqValues(freq, x, half, bin0, bin1,
autocorrelation, range, gain);
clip->mSpecPxCache->values[x * mid.height + yy] = value;
}
else