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Added support for writing bpm analysis debug file

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This commit is contained in:
oparviai 2011-07-13 08:07:14 +00:00
parent d002b52f2a
commit 1043811c6b
1 changed files with 39 additions and 1 deletions
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40
source/SoundTouch/BPMDetect.cpp
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@ -57,6 +57,7 @@
#include <math.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "FIFOSampleBuffer.h"
#include "PeakFinder.h"
#include "BPMDetect.h"
@ -74,6 +75,37 @@ const float avgdecay = 0.99986f;
const float avgnorm = (1 - avgdecay);
////////////////////////////////////////////////////////////////////////////////
// Enable following define to create bpm analysis file:
// #define _CREATE_BPM_DEBUG_FILE
#ifdef _CREATE_BPM_DEBUG_FILE
#define DEBUGFILE_NAME "c:\\temp\\soundtouch-bpm-debug.txt"
static void _SaveDebugData(const float *data, int minpos, int maxpos, double coeff)
{
FILE *fptr = fopen(DEBUGFILE_NAME, "wt");
int i;
if (fptr)
{
printf("\n\nWriting BPM debug data into file " DEBUGFILE_NAME "\n\n");
for (i = minpos; i < maxpos; i ++)
{
fprintf(fptr, "%d\t%.1lf\t%f\n", i, coeff / (double)i, data[i]);
}
fclose(fptr);
}
}
#else
#define _SaveDebugData(a,b,c,d)
#endif
////////////////////////////////////////////////////////////////////////////////
BPMDetect::BPMDetect(int numChannels, int aSampleRate)
{
@ -326,8 +358,14 @@ void BPMDetect::inputSamples(const SAMPLETYPE *samples, int numSamples)
float BPMDetect::getBpm()
{
double peakPos;
double coeff;
PeakFinder peakFinder;
coeff = 60.0 * ((double)sampleRate / (double)decimateBy);
// save bpm debug analysis data if debug data enabled
_SaveDebugData(xcorr, windowStart, windowLen, coeff);
// find peak position
peakPos = peakFinder.detectPeak(xcorr, windowStart, windowLen);
@ -335,5 +373,5 @@ float BPMDetect::getBpm()
if (peakPos < 1e-9) return 0.0; // detection failed.
// calculate BPM
return (float)(60.0 * (((double)sampleRate / (double)decimateBy) / peakPos));
return (float) (coeff / peakPos);
}