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BPMDetect: Change correlation loop 'sum' variable type from double to float, because double causes big performance penalty for autovectorized code.

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This commit is contained in:
Olli 2018-12-02 22:33:55 +02:00
parent 9205fc971e
commit eef1220d72
1 changed files with 2 additions and 3 deletions
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5
source/SoundTouch/BPMDetect.cpp
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@ -313,7 +313,7 @@ void BPMDetect::updateXCorr(int process_samples)
#pragma omp parallel for
for (offs = windowStart; offs < windowLen; offs ++)
{
double sum;
float sum;
int i;
sum = 0;
@ -341,7 +341,6 @@ void BPMDetect::updateBeatPos(int process_samples)
// static double thr = 0.0003;
double posScale = (double)this->decimateBy / (double)this->sampleRate;
int resetDur = (int)(0.12 / posScale + 0.5);
double corrScale = 1.0 / (double)(windowLen - windowStart);
// prescale pbuffer
float tmp[XCORR_UPDATE_SEQUENCE / 2];
@ -353,7 +352,7 @@ void BPMDetect::updateBeatPos(int process_samples)
#pragma omp parallel for
for (int offs = windowStart; offs < windowLen; offs++)
{
double sum = 0;
float sum = 0;
for (int i = 0; i < process_samples; i++)
{
sum += tmp[i] * pBuffer[offs + i];