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Floating point patch in PeakFinder

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This commit is contained in:
oparviai 2015-05-18 15:22:02 +00:00
parent d44723ea57
commit 4bc115df86
1 changed files with 13 additions and 3 deletions
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16
source/SoundTouch/PeakFinder.cpp
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@ -192,11 +192,21 @@ double PeakFinder::getPeakCenter(const float *data, int peakpos) const
gp1 = findGround(data, peakpos, -1);
gp2 = findGround(data, peakpos, 1);
groundLevel = 0.5f * (data[gp1] + data[gp2]);
peakLevel = data[peakpos];
// calculate 70%-level of the peak
cutLevel = 0.70f * peakLevel + 0.30f * groundLevel;
if (gp1 == gp2)
{
// avoid rounding errors when all are equal
assert(gp1 == peakpos);
cutLevel = groundLevel = peakLevel;
} else {
// get average of the ground levels
groundLevel = 0.5f * (data[gp1] + data[gp2]);
// calculate 70%-level of the peak
cutLevel = 0.70f * peakLevel + 0.30f * groundLevel;
}
// find mid-level crossings
crosspos1 = findCrossingLevel(data, cutLevel, peakpos, -1);
crosspos2 = findCrossingLevel(data, cutLevel, peakpos, 1);