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Introduce end-of-line normalization
Ensures that all files that Git considers to be text will have normalized (LF) line endings in the repository. When core.eol is set to native (which is the default), Git will convert the line endings of normalized files in your working directory back to your platform's native line ending. See also https://git-scm.com/docs/gitattributes
This commit is contained in:
Benjamin Drung
@@ -1,370 +1,370 @@
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////////////////////////////////////////////////////////////////////////////////
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///
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/// Beats-per-minute (BPM) detection routine.
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///
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/// The beat detection algorithm works as follows:
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/// - Use function 'inputSamples' to input a chunks of samples to the class for
|
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/// analysis. It's a good idea to enter a large sound file or stream in smallish
|
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/// chunks of around few kilosamples in order not to extinguish too much RAM memory.
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/// - Inputted sound data is decimated to approx 500 Hz to reduce calculation burden,
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/// which is basically ok as low (bass) frequencies mostly determine the beat rate.
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/// Simple averaging is used for anti-alias filtering because the resulting signal
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/// quality isn't of that high importance.
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/// - Decimated sound data is enveloped, i.e. the amplitude shape is detected by
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/// taking absolute value that's smoothed by sliding average. Signal levels that
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/// are below a couple of times the general RMS amplitude level are cut away to
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/// leave only notable peaks there.
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/// - Repeating sound patterns (e.g. beats) are detected by calculating short-term
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/// autocorrelation function of the enveloped signal.
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/// - After whole sound data file has been analyzed as above, the bpm level is
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/// detected by function 'getBpm' that finds the highest peak of the autocorrelation
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/// function, calculates it's precise location and converts this reading to bpm's.
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///
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/// Author : Copyright (c) Olli Parviainen
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/// Author e-mail : oparviai 'at' iki.fi
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/// SoundTouch WWW: http://www.surina.net/soundtouch
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///
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////////////////////////////////////////////////////////////////////////////////
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//
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// Last changed : $Date: 2012-08-30 22:45:25 +0300 (Thu, 30 Aug 2012) $
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// File revision : $Revision: 4 $
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//
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// $Id: BPMDetect.cpp 149 2012-08-30 19:45:25Z oparviai $
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// License :
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//
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// SoundTouch audio processing library
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// Copyright (c) Olli Parviainen
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
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||||
//
|
||||
// This library is distributed in the hope that it will be useful,
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||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
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||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
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||||
// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////
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#include <math.h>
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#include <assert.h>
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#include <string.h>
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#include <stdio.h>
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#include "FIFOSampleBuffer.h"
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#include "PeakFinder.h"
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#include "BPMDetect.h"
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using namespace soundtouch;
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#define INPUT_BLOCK_SAMPLES 2048
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#define DECIMATED_BLOCK_SAMPLES 256
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/// decay constant for calculating RMS volume sliding average approximation
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/// (time constant is about 10 sec)
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const float avgdecay = 0.99986f;
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/// Normalization coefficient for calculating RMS sliding average approximation.
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const float avgnorm = (1 - avgdecay);
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////////////////////////////////////////////////////////////////////////////////
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// Enable following define to create bpm analysis file:
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// #define _CREATE_BPM_DEBUG_FILE
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#ifdef _CREATE_BPM_DEBUG_FILE
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#define DEBUGFILE_NAME "c:\\temp\\soundtouch-bpm-debug.txt"
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static void _SaveDebugData(const float *data, int minpos, int maxpos, double coeff)
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{
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FILE *fptr = fopen(DEBUGFILE_NAME, "wt");
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int i;
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if (fptr)
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{
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printf("\n\nWriting BPM debug data into file " DEBUGFILE_NAME "\n\n");
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for (i = minpos; i < maxpos; i ++)
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{
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fprintf(fptr, "%d\t%.1lf\t%f\n", i, coeff / (double)i, data[i]);
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}
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fclose(fptr);
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}
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}
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#else
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#define _SaveDebugData(a,b,c,d)
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#endif
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////////////////////////////////////////////////////////////////////////////////
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BPMDetect::BPMDetect(int numChannels, int aSampleRate)
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{
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this->sampleRate = aSampleRate;
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this->channels = numChannels;
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decimateSum = 0;
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decimateCount = 0;
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envelopeAccu = 0;
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// Initialize RMS volume accumulator to RMS level of 1500 (out of 32768) that's
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// safe initial RMS signal level value for song data. This value is then adapted
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// to the actual level during processing.
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#ifdef SOUNDTOUCH_INTEGER_SAMPLES
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// integer samples
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RMSVolumeAccu = (1500 * 1500) / avgnorm;
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#else
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// float samples, scaled to range [-1..+1[
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RMSVolumeAccu = (0.045f * 0.045f) / avgnorm;
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#endif
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// choose decimation factor so that result is approx. 1000 Hz
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decimateBy = sampleRate / 1000;
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assert(decimateBy > 0);
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assert(INPUT_BLOCK_SAMPLES < decimateBy * DECIMATED_BLOCK_SAMPLES);
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// Calculate window length & starting item according to desired min & max bpms
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windowLen = (60 * sampleRate) / (decimateBy * MIN_BPM);
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windowStart = (60 * sampleRate) / (decimateBy * MAX_BPM);
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assert(windowLen > windowStart);
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// allocate new working objects
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xcorr = new float[windowLen];
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memset(xcorr, 0, windowLen * sizeof(float));
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// allocate processing buffer
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buffer = new FIFOSampleBuffer();
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// we do processing in mono mode
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buffer->setChannels(1);
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buffer->clear();
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}
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BPMDetect::~BPMDetect()
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{
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delete[] xcorr;
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delete buffer;
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}
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/// convert to mono, low-pass filter & decimate to about 500 Hz.
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/// return number of outputted samples.
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///
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/// Decimation is used to remove the unnecessary frequencies and thus to reduce
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/// the amount of data needed to be processed as calculating autocorrelation
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/// function is a very-very heavy operation.
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///
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/// Anti-alias filtering is done simply by averaging the samples. This is really a
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/// poor-man's anti-alias filtering, but it's not so critical in this kind of application
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/// (it'd also be difficult to design a high-quality filter with steep cut-off at very
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/// narrow band)
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int BPMDetect::decimate(SAMPLETYPE *dest, const SAMPLETYPE *src, int numsamples)
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{
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int count, outcount;
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LONG_SAMPLETYPE out;
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assert(channels > 0);
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assert(decimateBy > 0);
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outcount = 0;
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for (count = 0; count < numsamples; count ++)
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{
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int j;
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// convert to mono and accumulate
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for (j = 0; j < channels; j ++)
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{
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decimateSum += src[j];
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}
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src += j;
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decimateCount ++;
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if (decimateCount >= decimateBy)
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{
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// Store every Nth sample only
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out = (LONG_SAMPLETYPE)(decimateSum / (decimateBy * channels));
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decimateSum = 0;
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decimateCount = 0;
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#ifdef SOUNDTOUCH_INTEGER_SAMPLES
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// check ranges for sure (shouldn't actually be necessary)
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if (out > 32767)
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{
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out = 32767;
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}
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else if (out < -32768)
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{
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out = -32768;
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}
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#endif // SOUNDTOUCH_INTEGER_SAMPLES
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dest[outcount] = (SAMPLETYPE)out;
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outcount ++;
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}
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}
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return outcount;
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}
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// Calculates autocorrelation function of the sample history buffer
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void BPMDetect::updateXCorr(int process_samples)
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{
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int offs;
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SAMPLETYPE *pBuffer;
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assert(buffer->numSamples() >= (uint)(process_samples + windowLen));
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pBuffer = buffer->ptrBegin();
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for (offs = windowStart; offs < windowLen; offs ++)
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{
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LONG_SAMPLETYPE sum;
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int i;
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sum = 0;
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for (i = 0; i < process_samples; i ++)
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{
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sum += pBuffer[i] * pBuffer[i + offs]; // scaling the sub-result shouldn't be necessary
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}
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// xcorr[offs] *= xcorr_decay; // decay 'xcorr' here with suitable coefficients
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// if it's desired that the system adapts automatically to
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// various bpms, e.g. in processing continouos music stream.
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// The 'xcorr_decay' should be a value that's smaller than but
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// close to one, and should also depend on 'process_samples' value.
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xcorr[offs] += (float)sum;
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}
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}
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// Calculates envelope of the sample data
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void BPMDetect::calcEnvelope(SAMPLETYPE *samples, int numsamples)
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{
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const static double decay = 0.7f; // decay constant for smoothing the envelope
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const static double norm = (1 - decay);
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int i;
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LONG_SAMPLETYPE out;
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double val;
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for (i = 0; i < numsamples; i ++)
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{
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// calc average RMS volume
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RMSVolumeAccu *= avgdecay;
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val = (float)fabs((float)samples[i]);
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RMSVolumeAccu += val * val;
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// cut amplitudes that are below cutoff ~2 times RMS volume
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// (we're interested in peak values, not the silent moments)
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if (val < 0.5 * sqrt(RMSVolumeAccu * avgnorm))
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{
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val = 0;
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}
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// smooth amplitude envelope
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envelopeAccu *= decay;
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envelopeAccu += val;
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out = (LONG_SAMPLETYPE)(envelopeAccu * norm);
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#ifdef SOUNDTOUCH_INTEGER_SAMPLES
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// cut peaks (shouldn't be necessary though)
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if (out > 32767) out = 32767;
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#endif // SOUNDTOUCH_INTEGER_SAMPLES
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samples[i] = (SAMPLETYPE)out;
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}
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}
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void BPMDetect::inputSamples(const SAMPLETYPE *samples, int numSamples)
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{
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SAMPLETYPE decimated[DECIMATED_BLOCK_SAMPLES];
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// iterate so that max INPUT_BLOCK_SAMPLES processed per iteration
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while (numSamples > 0)
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{
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int block;
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int decSamples;
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block = (numSamples > INPUT_BLOCK_SAMPLES) ? INPUT_BLOCK_SAMPLES : numSamples;
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// decimate. note that converts to mono at the same time
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decSamples = decimate(decimated, samples, block);
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samples += block * channels;
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numSamples -= block;
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// envelope new samples and add them to buffer
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calcEnvelope(decimated, decSamples);
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buffer->putSamples(decimated, decSamples);
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}
|
||||
|
||||
// when the buffer has enought samples for processing...
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if ((int)buffer->numSamples() > windowLen)
|
||||
{
|
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int processLength;
|
||||
|
||||
// how many samples are processed
|
||||
processLength = (int)buffer->numSamples() - windowLen;
|
||||
|
||||
// ... calculate autocorrelations for oldest samples...
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updateXCorr(processLength);
|
||||
// ... and remove them from the buffer
|
||||
buffer->receiveSamples(processLength);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
void BPMDetect::removeBias()
|
||||
{
|
||||
int i;
|
||||
float minval = 1e12f; // arbitrary large number
|
||||
|
||||
for (i = windowStart; i < windowLen; i ++)
|
||||
{
|
||||
if (xcorr[i] < minval)
|
||||
{
|
||||
minval = xcorr[i];
|
||||
}
|
||||
}
|
||||
|
||||
for (i = windowStart; i < windowLen; i ++)
|
||||
{
|
||||
xcorr[i] -= minval;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
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);
|
||||
|
||||
// remove bias from xcorr data
|
||||
removeBias();
|
||||
|
||||
// find peak position
|
||||
peakPos = peakFinder.detectPeak(xcorr, windowStart, windowLen);
|
||||
|
||||
assert(decimateBy != 0);
|
||||
if (peakPos < 1e-9) return 0.0; // detection failed.
|
||||
|
||||
// calculate BPM
|
||||
return (float) (coeff / peakPos);
|
||||
}
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// Beats-per-minute (BPM) detection routine.
|
||||
///
|
||||
/// The beat detection algorithm works as follows:
|
||||
/// - Use function 'inputSamples' to input a chunks of samples to the class for
|
||||
/// analysis. It's a good idea to enter a large sound file or stream in smallish
|
||||
/// chunks of around few kilosamples in order not to extinguish too much RAM memory.
|
||||
/// - Inputted sound data is decimated to approx 500 Hz to reduce calculation burden,
|
||||
/// which is basically ok as low (bass) frequencies mostly determine the beat rate.
|
||||
/// Simple averaging is used for anti-alias filtering because the resulting signal
|
||||
/// quality isn't of that high importance.
|
||||
/// - Decimated sound data is enveloped, i.e. the amplitude shape is detected by
|
||||
/// taking absolute value that's smoothed by sliding average. Signal levels that
|
||||
/// are below a couple of times the general RMS amplitude level are cut away to
|
||||
/// leave only notable peaks there.
|
||||
/// - Repeating sound patterns (e.g. beats) are detected by calculating short-term
|
||||
/// autocorrelation function of the enveloped signal.
|
||||
/// - After whole sound data file has been analyzed as above, the bpm level is
|
||||
/// detected by function 'getBpm' that finds the highest peak of the autocorrelation
|
||||
/// function, calculates it's precise location and converts this reading to bpm's.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2012-08-30 22:45:25 +0300 (Thu, 30 Aug 2012) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: BPMDetect.cpp 149 2012-08-30 19:45:25Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#include <math.h>
|
||||
#include <assert.h>
|
||||
#include <string.h>
|
||||
#include <stdio.h>
|
||||
#include "FIFOSampleBuffer.h"
|
||||
#include "PeakFinder.h"
|
||||
#include "BPMDetect.h"
|
||||
|
||||
using namespace soundtouch;
|
||||
|
||||
#define INPUT_BLOCK_SAMPLES 2048
|
||||
#define DECIMATED_BLOCK_SAMPLES 256
|
||||
|
||||
/// decay constant for calculating RMS volume sliding average approximation
|
||||
/// (time constant is about 10 sec)
|
||||
const float avgdecay = 0.99986f;
|
||||
|
||||
/// Normalization coefficient for calculating RMS sliding average approximation.
|
||||
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)
|
||||
{
|
||||
this->sampleRate = aSampleRate;
|
||||
this->channels = numChannels;
|
||||
|
||||
decimateSum = 0;
|
||||
decimateCount = 0;
|
||||
|
||||
envelopeAccu = 0;
|
||||
|
||||
// Initialize RMS volume accumulator to RMS level of 1500 (out of 32768) that's
|
||||
// safe initial RMS signal level value for song data. This value is then adapted
|
||||
// to the actual level during processing.
|
||||
#ifdef SOUNDTOUCH_INTEGER_SAMPLES
|
||||
// integer samples
|
||||
RMSVolumeAccu = (1500 * 1500) / avgnorm;
|
||||
#else
|
||||
// float samples, scaled to range [-1..+1[
|
||||
RMSVolumeAccu = (0.045f * 0.045f) / avgnorm;
|
||||
#endif
|
||||
|
||||
// choose decimation factor so that result is approx. 1000 Hz
|
||||
decimateBy = sampleRate / 1000;
|
||||
assert(decimateBy > 0);
|
||||
assert(INPUT_BLOCK_SAMPLES < decimateBy * DECIMATED_BLOCK_SAMPLES);
|
||||
|
||||
// Calculate window length & starting item according to desired min & max bpms
|
||||
windowLen = (60 * sampleRate) / (decimateBy * MIN_BPM);
|
||||
windowStart = (60 * sampleRate) / (decimateBy * MAX_BPM);
|
||||
|
||||
assert(windowLen > windowStart);
|
||||
|
||||
// allocate new working objects
|
||||
xcorr = new float[windowLen];
|
||||
memset(xcorr, 0, windowLen * sizeof(float));
|
||||
|
||||
// allocate processing buffer
|
||||
buffer = new FIFOSampleBuffer();
|
||||
// we do processing in mono mode
|
||||
buffer->setChannels(1);
|
||||
buffer->clear();
|
||||
}
|
||||
|
||||
|
||||
|
||||
BPMDetect::~BPMDetect()
|
||||
{
|
||||
delete[] xcorr;
|
||||
delete buffer;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/// convert to mono, low-pass filter & decimate to about 500 Hz.
|
||||
/// return number of outputted samples.
|
||||
///
|
||||
/// Decimation is used to remove the unnecessary frequencies and thus to reduce
|
||||
/// the amount of data needed to be processed as calculating autocorrelation
|
||||
/// function is a very-very heavy operation.
|
||||
///
|
||||
/// Anti-alias filtering is done simply by averaging the samples. This is really a
|
||||
/// poor-man's anti-alias filtering, but it's not so critical in this kind of application
|
||||
/// (it'd also be difficult to design a high-quality filter with steep cut-off at very
|
||||
/// narrow band)
|
||||
int BPMDetect::decimate(SAMPLETYPE *dest, const SAMPLETYPE *src, int numsamples)
|
||||
{
|
||||
int count, outcount;
|
||||
LONG_SAMPLETYPE out;
|
||||
|
||||
assert(channels > 0);
|
||||
assert(decimateBy > 0);
|
||||
outcount = 0;
|
||||
for (count = 0; count < numsamples; count ++)
|
||||
{
|
||||
int j;
|
||||
|
||||
// convert to mono and accumulate
|
||||
for (j = 0; j < channels; j ++)
|
||||
{
|
||||
decimateSum += src[j];
|
||||
}
|
||||
src += j;
|
||||
|
||||
decimateCount ++;
|
||||
if (decimateCount >= decimateBy)
|
||||
{
|
||||
// Store every Nth sample only
|
||||
out = (LONG_SAMPLETYPE)(decimateSum / (decimateBy * channels));
|
||||
decimateSum = 0;
|
||||
decimateCount = 0;
|
||||
#ifdef SOUNDTOUCH_INTEGER_SAMPLES
|
||||
// check ranges for sure (shouldn't actually be necessary)
|
||||
if (out > 32767)
|
||||
{
|
||||
out = 32767;
|
||||
}
|
||||
else if (out < -32768)
|
||||
{
|
||||
out = -32768;
|
||||
}
|
||||
#endif // SOUNDTOUCH_INTEGER_SAMPLES
|
||||
dest[outcount] = (SAMPLETYPE)out;
|
||||
outcount ++;
|
||||
}
|
||||
}
|
||||
return outcount;
|
||||
}
|
||||
|
||||
|
||||
|
||||
// Calculates autocorrelation function of the sample history buffer
|
||||
void BPMDetect::updateXCorr(int process_samples)
|
||||
{
|
||||
int offs;
|
||||
SAMPLETYPE *pBuffer;
|
||||
|
||||
assert(buffer->numSamples() >= (uint)(process_samples + windowLen));
|
||||
|
||||
pBuffer = buffer->ptrBegin();
|
||||
for (offs = windowStart; offs < windowLen; offs ++)
|
||||
{
|
||||
LONG_SAMPLETYPE sum;
|
||||
int i;
|
||||
|
||||
sum = 0;
|
||||
for (i = 0; i < process_samples; i ++)
|
||||
{
|
||||
sum += pBuffer[i] * pBuffer[i + offs]; // scaling the sub-result shouldn't be necessary
|
||||
}
|
||||
// xcorr[offs] *= xcorr_decay; // decay 'xcorr' here with suitable coefficients
|
||||
// if it's desired that the system adapts automatically to
|
||||
// various bpms, e.g. in processing continouos music stream.
|
||||
// The 'xcorr_decay' should be a value that's smaller than but
|
||||
// close to one, and should also depend on 'process_samples' value.
|
||||
|
||||
xcorr[offs] += (float)sum;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Calculates envelope of the sample data
|
||||
void BPMDetect::calcEnvelope(SAMPLETYPE *samples, int numsamples)
|
||||
{
|
||||
const static double decay = 0.7f; // decay constant for smoothing the envelope
|
||||
const static double norm = (1 - decay);
|
||||
|
||||
int i;
|
||||
LONG_SAMPLETYPE out;
|
||||
double val;
|
||||
|
||||
for (i = 0; i < numsamples; i ++)
|
||||
{
|
||||
// calc average RMS volume
|
||||
RMSVolumeAccu *= avgdecay;
|
||||
val = (float)fabs((float)samples[i]);
|
||||
RMSVolumeAccu += val * val;
|
||||
|
||||
// cut amplitudes that are below cutoff ~2 times RMS volume
|
||||
// (we're interested in peak values, not the silent moments)
|
||||
if (val < 0.5 * sqrt(RMSVolumeAccu * avgnorm))
|
||||
{
|
||||
val = 0;
|
||||
}
|
||||
|
||||
// smooth amplitude envelope
|
||||
envelopeAccu *= decay;
|
||||
envelopeAccu += val;
|
||||
out = (LONG_SAMPLETYPE)(envelopeAccu * norm);
|
||||
|
||||
#ifdef SOUNDTOUCH_INTEGER_SAMPLES
|
||||
// cut peaks (shouldn't be necessary though)
|
||||
if (out > 32767) out = 32767;
|
||||
#endif // SOUNDTOUCH_INTEGER_SAMPLES
|
||||
samples[i] = (SAMPLETYPE)out;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
void BPMDetect::inputSamples(const SAMPLETYPE *samples, int numSamples)
|
||||
{
|
||||
SAMPLETYPE decimated[DECIMATED_BLOCK_SAMPLES];
|
||||
|
||||
// iterate so that max INPUT_BLOCK_SAMPLES processed per iteration
|
||||
while (numSamples > 0)
|
||||
{
|
||||
int block;
|
||||
int decSamples;
|
||||
|
||||
block = (numSamples > INPUT_BLOCK_SAMPLES) ? INPUT_BLOCK_SAMPLES : numSamples;
|
||||
|
||||
// decimate. note that converts to mono at the same time
|
||||
decSamples = decimate(decimated, samples, block);
|
||||
samples += block * channels;
|
||||
numSamples -= block;
|
||||
|
||||
// envelope new samples and add them to buffer
|
||||
calcEnvelope(decimated, decSamples);
|
||||
buffer->putSamples(decimated, decSamples);
|
||||
}
|
||||
|
||||
// when the buffer has enought samples for processing...
|
||||
if ((int)buffer->numSamples() > windowLen)
|
||||
{
|
||||
int processLength;
|
||||
|
||||
// how many samples are processed
|
||||
processLength = (int)buffer->numSamples() - windowLen;
|
||||
|
||||
// ... calculate autocorrelations for oldest samples...
|
||||
updateXCorr(processLength);
|
||||
// ... and remove them from the buffer
|
||||
buffer->receiveSamples(processLength);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
void BPMDetect::removeBias()
|
||||
{
|
||||
int i;
|
||||
float minval = 1e12f; // arbitrary large number
|
||||
|
||||
for (i = windowStart; i < windowLen; i ++)
|
||||
{
|
||||
if (xcorr[i] < minval)
|
||||
{
|
||||
minval = xcorr[i];
|
||||
}
|
||||
}
|
||||
|
||||
for (i = windowStart; i < windowLen; i ++)
|
||||
{
|
||||
xcorr[i] -= minval;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
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);
|
||||
|
||||
// remove bias from xcorr data
|
||||
removeBias();
|
||||
|
||||
// find peak position
|
||||
peakPos = peakFinder.detectPeak(xcorr, windowStart, windowLen);
|
||||
|
||||
assert(decimateBy != 0);
|
||||
if (peakPos < 1e-9) return 0.0; // detection failed.
|
||||
|
||||
// calculate BPM
|
||||
return (float) (coeff / peakPos);
|
||||
}
|
||||
|
||||
@@ -1,71 +1,71 @@
|
||||
## Process this file with automake to create Makefile.in
|
||||
##
|
||||
## $Id: Makefile.am 138 2012-04-01 20:00:09Z oparviai $
|
||||
##
|
||||
## This file is part of SoundTouch, an audio processing library for pitch/time adjustments
|
||||
##
|
||||
## SoundTouch is free software; you can redistribute it and/or modify it under the
|
||||
## terms of the GNU General Public License as published by the Free Software
|
||||
## Foundation; either version 2 of the License, or (at your option) any later
|
||||
## version.
|
||||
##
|
||||
## SoundTouch is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
## WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
||||
## A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
||||
##
|
||||
## You should have received a copy of the GNU General Public License along with
|
||||
## this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
||||
## Place - Suite 330, Boston, MA 02111-1307, USA
|
||||
|
||||
|
||||
include $(top_srcdir)/config/am_include.mk
|
||||
|
||||
|
||||
# set to something if you want other stuff to be included in the distribution tarball
|
||||
EXTRA_DIST=SoundTouch.dsp SoundTouch.dsw SoundTouch.sln SoundTouch.vcproj
|
||||
|
||||
noinst_HEADERS=AAFilter.h cpu_detect.h cpu_detect_x86.cpp FIRFilter.h RateTransposer.h TDStretch.h PeakFinder.h
|
||||
|
||||
lib_LTLIBRARIES=libSoundTouch.la
|
||||
#
|
||||
libSoundTouch_la_SOURCES=AAFilter.cpp FIRFilter.cpp FIFOSampleBuffer.cpp RateTransposer.cpp SoundTouch.cpp TDStretch.cpp cpu_detect_x86.cpp BPMDetect.cpp PeakFinder.cpp
|
||||
|
||||
|
||||
# Compiler flags
|
||||
AM_CXXFLAGS=-O3 -fcheck-new -I../../include
|
||||
|
||||
# Compile the files that need MMX and SSE individually.
|
||||
libSoundTouch_la_LIBADD=libSoundTouchMMX.la libSoundTouchSSE.la
|
||||
noinst_LTLIBRARIES=libSoundTouchMMX.la libSoundTouchSSE.la
|
||||
libSoundTouchMMX_la_SOURCES=mmx_optimized.cpp
|
||||
libSoundTouchSSE_la_SOURCES=sse_optimized.cpp
|
||||
|
||||
# We enable optimizations by default.
|
||||
# If MMX is supported compile with -mmmx.
|
||||
# Do not assume -msse is also supported.
|
||||
if HAVE_MMX
|
||||
libSoundTouchMMX_la_CXXFLAGS = -mmmx $(AM_CXXFLAGS)
|
||||
else
|
||||
libSoundTouchMMX_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
# We enable optimizations by default.
|
||||
# If SSE is supported compile with -msse.
|
||||
if HAVE_SSE
|
||||
libSoundTouchSSE_la_CXXFLAGS = -msse $(AM_CXXFLAGS)
|
||||
else
|
||||
libSoundTouchSSE_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
# Let the user disable optimizations if he wishes to.
|
||||
if !X86_OPTIMIZATIONS
|
||||
libSoundTouchMMX_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
libSoundTouchSSE_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
|
||||
# other linking flags to add
|
||||
# noinst_LTLIBRARIES = libSoundTouchOpt.la
|
||||
# libSoundTouch_la_LIBADD = libSoundTouchOpt.la
|
||||
# libSoundTouchOpt_la_SOURCES = mmx_optimized.cpp sse_optimized.cpp
|
||||
# libSoundTouchOpt_la_CXXFLAGS = -O3 -msse -fcheck-new -I../../include
|
||||
## Process this file with automake to create Makefile.in
|
||||
##
|
||||
## $Id: Makefile.am 138 2012-04-01 20:00:09Z oparviai $
|
||||
##
|
||||
## This file is part of SoundTouch, an audio processing library for pitch/time adjustments
|
||||
##
|
||||
## SoundTouch is free software; you can redistribute it and/or modify it under the
|
||||
## terms of the GNU General Public License as published by the Free Software
|
||||
## Foundation; either version 2 of the License, or (at your option) any later
|
||||
## version.
|
||||
##
|
||||
## SoundTouch is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
## WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
||||
## A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
||||
##
|
||||
## You should have received a copy of the GNU General Public License along with
|
||||
## this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
||||
## Place - Suite 330, Boston, MA 02111-1307, USA
|
||||
|
||||
|
||||
include $(top_srcdir)/config/am_include.mk
|
||||
|
||||
|
||||
# set to something if you want other stuff to be included in the distribution tarball
|
||||
EXTRA_DIST=SoundTouch.dsp SoundTouch.dsw SoundTouch.sln SoundTouch.vcproj
|
||||
|
||||
noinst_HEADERS=AAFilter.h cpu_detect.h cpu_detect_x86.cpp FIRFilter.h RateTransposer.h TDStretch.h PeakFinder.h
|
||||
|
||||
lib_LTLIBRARIES=libSoundTouch.la
|
||||
#
|
||||
libSoundTouch_la_SOURCES=AAFilter.cpp FIRFilter.cpp FIFOSampleBuffer.cpp RateTransposer.cpp SoundTouch.cpp TDStretch.cpp cpu_detect_x86.cpp BPMDetect.cpp PeakFinder.cpp
|
||||
|
||||
|
||||
# Compiler flags
|
||||
AM_CXXFLAGS=-O3 -fcheck-new -I../../include
|
||||
|
||||
# Compile the files that need MMX and SSE individually.
|
||||
libSoundTouch_la_LIBADD=libSoundTouchMMX.la libSoundTouchSSE.la
|
||||
noinst_LTLIBRARIES=libSoundTouchMMX.la libSoundTouchSSE.la
|
||||
libSoundTouchMMX_la_SOURCES=mmx_optimized.cpp
|
||||
libSoundTouchSSE_la_SOURCES=sse_optimized.cpp
|
||||
|
||||
# We enable optimizations by default.
|
||||
# If MMX is supported compile with -mmmx.
|
||||
# Do not assume -msse is also supported.
|
||||
if HAVE_MMX
|
||||
libSoundTouchMMX_la_CXXFLAGS = -mmmx $(AM_CXXFLAGS)
|
||||
else
|
||||
libSoundTouchMMX_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
# We enable optimizations by default.
|
||||
# If SSE is supported compile with -msse.
|
||||
if HAVE_SSE
|
||||
libSoundTouchSSE_la_CXXFLAGS = -msse $(AM_CXXFLAGS)
|
||||
else
|
||||
libSoundTouchSSE_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
# Let the user disable optimizations if he wishes to.
|
||||
if !X86_OPTIMIZATIONS
|
||||
libSoundTouchMMX_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
libSoundTouchSSE_la_CXXFLAGS = $(AM_CXXFLAGS)
|
||||
endif
|
||||
|
||||
|
||||
# other linking flags to add
|
||||
# noinst_LTLIBRARIES = libSoundTouchOpt.la
|
||||
# libSoundTouch_la_LIBADD = libSoundTouchOpt.la
|
||||
# libSoundTouchOpt_la_SOURCES = mmx_optimized.cpp sse_optimized.cpp
|
||||
# libSoundTouchOpt_la_CXXFLAGS = -O3 -msse -fcheck-new -I../../include
|
||||
|
||||
@@ -1,276 +1,276 @@
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// Peak detection routine.
|
||||
///
|
||||
/// The routine detects highest value on an array of values and calculates the
|
||||
/// precise peak location as a mass-center of the 'hump' around the peak value.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2012-12-28 21:52:47 +0200 (Fri, 28 Dec 2012) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: PeakFinder.cpp 164 2012-12-28 19:52:47Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#include <math.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include "PeakFinder.h"
|
||||
|
||||
using namespace soundtouch;
|
||||
|
||||
#define max(x, y) (((x) > (y)) ? (x) : (y))
|
||||
|
||||
|
||||
PeakFinder::PeakFinder()
|
||||
{
|
||||
minPos = maxPos = 0;
|
||||
}
|
||||
|
||||
|
||||
// Finds real 'top' of a peak hump from neighnourhood of the given 'peakpos'.
|
||||
int PeakFinder::findTop(const float *data, int peakpos) const
|
||||
{
|
||||
int i;
|
||||
int start, end;
|
||||
float refvalue;
|
||||
|
||||
refvalue = data[peakpos];
|
||||
|
||||
// seek within <20>10 points
|
||||
start = peakpos - 10;
|
||||
if (start < minPos) start = minPos;
|
||||
end = peakpos + 10;
|
||||
if (end > maxPos) end = maxPos;
|
||||
|
||||
for (i = start; i <= end; i ++)
|
||||
{
|
||||
if (data[i] > refvalue)
|
||||
{
|
||||
peakpos = i;
|
||||
refvalue = data[i];
|
||||
}
|
||||
}
|
||||
|
||||
// failure if max value is at edges of seek range => it's not peak, it's at slope.
|
||||
if ((peakpos == start) || (peakpos == end)) return 0;
|
||||
|
||||
return peakpos;
|
||||
}
|
||||
|
||||
|
||||
// Finds 'ground level' of a peak hump by starting from 'peakpos' and proceeding
|
||||
// to direction defined by 'direction' until next 'hump' after minimum value will
|
||||
// begin
|
||||
int PeakFinder::findGround(const float *data, int peakpos, int direction) const
|
||||
{
|
||||
int lowpos;
|
||||
int pos;
|
||||
int climb_count;
|
||||
float refvalue;
|
||||
float delta;
|
||||
|
||||
climb_count = 0;
|
||||
refvalue = data[peakpos];
|
||||
lowpos = peakpos;
|
||||
|
||||
pos = peakpos;
|
||||
|
||||
while ((pos > minPos+1) && (pos < maxPos-1))
|
||||
{
|
||||
int prevpos;
|
||||
|
||||
prevpos = pos;
|
||||
pos += direction;
|
||||
|
||||
// calculate derivate
|
||||
delta = data[pos] - data[prevpos];
|
||||
if (delta <= 0)
|
||||
{
|
||||
// going downhill, ok
|
||||
if (climb_count)
|
||||
{
|
||||
climb_count --; // decrease climb count
|
||||
}
|
||||
|
||||
// check if new minimum found
|
||||
if (data[pos] < refvalue)
|
||||
{
|
||||
// new minimum found
|
||||
lowpos = pos;
|
||||
refvalue = data[pos];
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// going uphill, increase climbing counter
|
||||
climb_count ++;
|
||||
if (climb_count > 5) break; // we've been climbing too long => it's next uphill => quit
|
||||
}
|
||||
}
|
||||
return lowpos;
|
||||
}
|
||||
|
||||
|
||||
// Find offset where the value crosses the given level, when starting from 'peakpos' and
|
||||
// proceeds to direction defined in 'direction'
|
||||
int PeakFinder::findCrossingLevel(const float *data, float level, int peakpos, int direction) const
|
||||
{
|
||||
float peaklevel;
|
||||
int pos;
|
||||
|
||||
peaklevel = data[peakpos];
|
||||
assert(peaklevel >= level);
|
||||
pos = peakpos;
|
||||
while ((pos >= minPos) && (pos < maxPos))
|
||||
{
|
||||
if (data[pos + direction] < level) return pos; // crossing found
|
||||
pos += direction;
|
||||
}
|
||||
return -1; // not found
|
||||
}
|
||||
|
||||
|
||||
// Calculates the center of mass location of 'data' array items between 'firstPos' and 'lastPos'
|
||||
double PeakFinder::calcMassCenter(const float *data, int firstPos, int lastPos) const
|
||||
{
|
||||
int i;
|
||||
float sum;
|
||||
float wsum;
|
||||
|
||||
sum = 0;
|
||||
wsum = 0;
|
||||
for (i = firstPos; i <= lastPos; i ++)
|
||||
{
|
||||
sum += (float)i * data[i];
|
||||
wsum += data[i];
|
||||
}
|
||||
|
||||
if (wsum < 1e-6) return 0;
|
||||
return sum / wsum;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/// get exact center of peak near given position by calculating local mass of center
|
||||
double PeakFinder::getPeakCenter(const float *data, int peakpos) const
|
||||
{
|
||||
float peakLevel; // peak level
|
||||
int crosspos1, crosspos2; // position where the peak 'hump' crosses cutting level
|
||||
float cutLevel; // cutting value
|
||||
float groundLevel; // ground level of the peak
|
||||
int gp1, gp2; // bottom positions of the peak 'hump'
|
||||
|
||||
// find ground positions.
|
||||
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;
|
||||
// find mid-level crossings
|
||||
crosspos1 = findCrossingLevel(data, cutLevel, peakpos, -1);
|
||||
crosspos2 = findCrossingLevel(data, cutLevel, peakpos, 1);
|
||||
|
||||
if ((crosspos1 < 0) || (crosspos2 < 0)) return 0; // no crossing, no peak..
|
||||
|
||||
// calculate mass center of the peak surroundings
|
||||
return calcMassCenter(data, crosspos1, crosspos2);
|
||||
}
|
||||
|
||||
|
||||
|
||||
double PeakFinder::detectPeak(const float *data, int aminPos, int amaxPos)
|
||||
{
|
||||
|
||||
int i;
|
||||
int peakpos; // position of peak level
|
||||
double highPeak, peak;
|
||||
|
||||
this->minPos = aminPos;
|
||||
this->maxPos = amaxPos;
|
||||
|
||||
// find absolute peak
|
||||
peakpos = minPos;
|
||||
peak = data[minPos];
|
||||
for (i = minPos + 1; i < maxPos; i ++)
|
||||
{
|
||||
if (data[i] > peak)
|
||||
{
|
||||
peak = data[i];
|
||||
peakpos = i;
|
||||
}
|
||||
}
|
||||
|
||||
// Calculate exact location of the highest peak mass center
|
||||
highPeak = getPeakCenter(data, peakpos);
|
||||
peak = highPeak;
|
||||
|
||||
// Now check if the highest peak were in fact harmonic of the true base beat peak
|
||||
// - sometimes the highest peak can be Nth harmonic of the true base peak yet
|
||||
// just a slightly higher than the true base
|
||||
|
||||
for (i = 3; i < 10; i ++)
|
||||
{
|
||||
double peaktmp, harmonic;
|
||||
int i1,i2;
|
||||
|
||||
harmonic = (double)i * 0.5;
|
||||
peakpos = (int)(highPeak / harmonic + 0.5f);
|
||||
if (peakpos < minPos) break;
|
||||
peakpos = findTop(data, peakpos); // seek true local maximum index
|
||||
if (peakpos == 0) continue; // no local max here
|
||||
|
||||
// calculate mass-center of possible harmonic peak
|
||||
peaktmp = getPeakCenter(data, peakpos);
|
||||
|
||||
// accept harmonic peak if
|
||||
// (a) it is found
|
||||
// (b) is within <20>4% of the expected harmonic interval
|
||||
// (c) has at least half x-corr value of the max. peak
|
||||
|
||||
double diff = harmonic * peaktmp / highPeak;
|
||||
if ((diff < 0.96) || (diff > 1.04)) continue; // peak too afar from expected
|
||||
|
||||
// now compare to highest detected peak
|
||||
i1 = (int)(highPeak + 0.5);
|
||||
i2 = (int)(peaktmp + 0.5);
|
||||
if (data[i2] >= 0.4*data[i1])
|
||||
{
|
||||
// The harmonic is at least half as high primary peak,
|
||||
// thus use the harmonic peak instead
|
||||
peak = peaktmp;
|
||||
}
|
||||
}
|
||||
|
||||
return peak;
|
||||
}
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// Peak detection routine.
|
||||
///
|
||||
/// The routine detects highest value on an array of values and calculates the
|
||||
/// precise peak location as a mass-center of the 'hump' around the peak value.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2012-12-28 21:52:47 +0200 (Fri, 28 Dec 2012) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: PeakFinder.cpp 164 2012-12-28 19:52:47Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#include <math.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include "PeakFinder.h"
|
||||
|
||||
using namespace soundtouch;
|
||||
|
||||
#define max(x, y) (((x) > (y)) ? (x) : (y))
|
||||
|
||||
|
||||
PeakFinder::PeakFinder()
|
||||
{
|
||||
minPos = maxPos = 0;
|
||||
}
|
||||
|
||||
|
||||
// Finds real 'top' of a peak hump from neighnourhood of the given 'peakpos'.
|
||||
int PeakFinder::findTop(const float *data, int peakpos) const
|
||||
{
|
||||
int i;
|
||||
int start, end;
|
||||
float refvalue;
|
||||
|
||||
refvalue = data[peakpos];
|
||||
|
||||
// seek within <20>10 points
|
||||
start = peakpos - 10;
|
||||
if (start < minPos) start = minPos;
|
||||
end = peakpos + 10;
|
||||
if (end > maxPos) end = maxPos;
|
||||
|
||||
for (i = start; i <= end; i ++)
|
||||
{
|
||||
if (data[i] > refvalue)
|
||||
{
|
||||
peakpos = i;
|
||||
refvalue = data[i];
|
||||
}
|
||||
}
|
||||
|
||||
// failure if max value is at edges of seek range => it's not peak, it's at slope.
|
||||
if ((peakpos == start) || (peakpos == end)) return 0;
|
||||
|
||||
return peakpos;
|
||||
}
|
||||
|
||||
|
||||
// Finds 'ground level' of a peak hump by starting from 'peakpos' and proceeding
|
||||
// to direction defined by 'direction' until next 'hump' after minimum value will
|
||||
// begin
|
||||
int PeakFinder::findGround(const float *data, int peakpos, int direction) const
|
||||
{
|
||||
int lowpos;
|
||||
int pos;
|
||||
int climb_count;
|
||||
float refvalue;
|
||||
float delta;
|
||||
|
||||
climb_count = 0;
|
||||
refvalue = data[peakpos];
|
||||
lowpos = peakpos;
|
||||
|
||||
pos = peakpos;
|
||||
|
||||
while ((pos > minPos+1) && (pos < maxPos-1))
|
||||
{
|
||||
int prevpos;
|
||||
|
||||
prevpos = pos;
|
||||
pos += direction;
|
||||
|
||||
// calculate derivate
|
||||
delta = data[pos] - data[prevpos];
|
||||
if (delta <= 0)
|
||||
{
|
||||
// going downhill, ok
|
||||
if (climb_count)
|
||||
{
|
||||
climb_count --; // decrease climb count
|
||||
}
|
||||
|
||||
// check if new minimum found
|
||||
if (data[pos] < refvalue)
|
||||
{
|
||||
// new minimum found
|
||||
lowpos = pos;
|
||||
refvalue = data[pos];
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// going uphill, increase climbing counter
|
||||
climb_count ++;
|
||||
if (climb_count > 5) break; // we've been climbing too long => it's next uphill => quit
|
||||
}
|
||||
}
|
||||
return lowpos;
|
||||
}
|
||||
|
||||
|
||||
// Find offset where the value crosses the given level, when starting from 'peakpos' and
|
||||
// proceeds to direction defined in 'direction'
|
||||
int PeakFinder::findCrossingLevel(const float *data, float level, int peakpos, int direction) const
|
||||
{
|
||||
float peaklevel;
|
||||
int pos;
|
||||
|
||||
peaklevel = data[peakpos];
|
||||
assert(peaklevel >= level);
|
||||
pos = peakpos;
|
||||
while ((pos >= minPos) && (pos < maxPos))
|
||||
{
|
||||
if (data[pos + direction] < level) return pos; // crossing found
|
||||
pos += direction;
|
||||
}
|
||||
return -1; // not found
|
||||
}
|
||||
|
||||
|
||||
// Calculates the center of mass location of 'data' array items between 'firstPos' and 'lastPos'
|
||||
double PeakFinder::calcMassCenter(const float *data, int firstPos, int lastPos) const
|
||||
{
|
||||
int i;
|
||||
float sum;
|
||||
float wsum;
|
||||
|
||||
sum = 0;
|
||||
wsum = 0;
|
||||
for (i = firstPos; i <= lastPos; i ++)
|
||||
{
|
||||
sum += (float)i * data[i];
|
||||
wsum += data[i];
|
||||
}
|
||||
|
||||
if (wsum < 1e-6) return 0;
|
||||
return sum / wsum;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/// get exact center of peak near given position by calculating local mass of center
|
||||
double PeakFinder::getPeakCenter(const float *data, int peakpos) const
|
||||
{
|
||||
float peakLevel; // peak level
|
||||
int crosspos1, crosspos2; // position where the peak 'hump' crosses cutting level
|
||||
float cutLevel; // cutting value
|
||||
float groundLevel; // ground level of the peak
|
||||
int gp1, gp2; // bottom positions of the peak 'hump'
|
||||
|
||||
// find ground positions.
|
||||
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;
|
||||
// find mid-level crossings
|
||||
crosspos1 = findCrossingLevel(data, cutLevel, peakpos, -1);
|
||||
crosspos2 = findCrossingLevel(data, cutLevel, peakpos, 1);
|
||||
|
||||
if ((crosspos1 < 0) || (crosspos2 < 0)) return 0; // no crossing, no peak..
|
||||
|
||||
// calculate mass center of the peak surroundings
|
||||
return calcMassCenter(data, crosspos1, crosspos2);
|
||||
}
|
||||
|
||||
|
||||
|
||||
double PeakFinder::detectPeak(const float *data, int aminPos, int amaxPos)
|
||||
{
|
||||
|
||||
int i;
|
||||
int peakpos; // position of peak level
|
||||
double highPeak, peak;
|
||||
|
||||
this->minPos = aminPos;
|
||||
this->maxPos = amaxPos;
|
||||
|
||||
// find absolute peak
|
||||
peakpos = minPos;
|
||||
peak = data[minPos];
|
||||
for (i = minPos + 1; i < maxPos; i ++)
|
||||
{
|
||||
if (data[i] > peak)
|
||||
{
|
||||
peak = data[i];
|
||||
peakpos = i;
|
||||
}
|
||||
}
|
||||
|
||||
// Calculate exact location of the highest peak mass center
|
||||
highPeak = getPeakCenter(data, peakpos);
|
||||
peak = highPeak;
|
||||
|
||||
// Now check if the highest peak were in fact harmonic of the true base beat peak
|
||||
// - sometimes the highest peak can be Nth harmonic of the true base peak yet
|
||||
// just a slightly higher than the true base
|
||||
|
||||
for (i = 3; i < 10; i ++)
|
||||
{
|
||||
double peaktmp, harmonic;
|
||||
int i1,i2;
|
||||
|
||||
harmonic = (double)i * 0.5;
|
||||
peakpos = (int)(highPeak / harmonic + 0.5f);
|
||||
if (peakpos < minPos) break;
|
||||
peakpos = findTop(data, peakpos); // seek true local maximum index
|
||||
if (peakpos == 0) continue; // no local max here
|
||||
|
||||
// calculate mass-center of possible harmonic peak
|
||||
peaktmp = getPeakCenter(data, peakpos);
|
||||
|
||||
// accept harmonic peak if
|
||||
// (a) it is found
|
||||
// (b) is within <20>4% of the expected harmonic interval
|
||||
// (c) has at least half x-corr value of the max. peak
|
||||
|
||||
double diff = harmonic * peaktmp / highPeak;
|
||||
if ((diff < 0.96) || (diff > 1.04)) continue; // peak too afar from expected
|
||||
|
||||
// now compare to highest detected peak
|
||||
i1 = (int)(highPeak + 0.5);
|
||||
i2 = (int)(peaktmp + 0.5);
|
||||
if (data[i2] >= 0.4*data[i1])
|
||||
{
|
||||
// The harmonic is at least half as high primary peak,
|
||||
// thus use the harmonic peak instead
|
||||
peak = peaktmp;
|
||||
}
|
||||
}
|
||||
|
||||
return peak;
|
||||
}
|
||||
|
||||
@@ -1,97 +1,97 @@
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// The routine detects highest value on an array of values and calculates the
|
||||
/// precise peak location as a mass-center of the 'hump' around the peak value.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2011-12-30 22:33:46 +0200 (Fri, 30 Dec 2011) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: PeakFinder.h 132 2011-12-30 20:33:46Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#ifndef _PeakFinder_H_
|
||||
#define _PeakFinder_H_
|
||||
|
||||
namespace soundtouch
|
||||
{
|
||||
|
||||
class PeakFinder
|
||||
{
|
||||
protected:
|
||||
/// Min, max allowed peak positions within the data vector
|
||||
int minPos, maxPos;
|
||||
|
||||
/// Calculates the mass center between given vector items.
|
||||
double calcMassCenter(const float *data, ///< Data vector.
|
||||
int firstPos, ///< Index of first vector item beloging to the peak.
|
||||
int lastPos ///< Index of last vector item beloging to the peak.
|
||||
) const;
|
||||
|
||||
/// Finds the data vector index where the monotoniously decreasing signal crosses the
|
||||
/// given level.
|
||||
int findCrossingLevel(const float *data, ///< Data vector.
|
||||
float level, ///< Goal crossing level.
|
||||
int peakpos, ///< Peak position index within the data vector.
|
||||
int direction /// Direction where to proceed from the peak: 1 = right, -1 = left.
|
||||
) const;
|
||||
|
||||
// Finds real 'top' of a peak hump from neighnourhood of the given 'peakpos'.
|
||||
int findTop(const float *data, int peakpos) const;
|
||||
|
||||
|
||||
/// Finds the 'ground' level, i.e. smallest level between two neighbouring peaks, to right-
|
||||
/// or left-hand side of the given peak position.
|
||||
int findGround(const float *data, /// Data vector.
|
||||
int peakpos, /// Peak position index within the data vector.
|
||||
int direction /// Direction where to proceed from the peak: 1 = right, -1 = left.
|
||||
) const;
|
||||
|
||||
/// get exact center of peak near given position by calculating local mass of center
|
||||
double getPeakCenter(const float *data, int peakpos) const;
|
||||
|
||||
public:
|
||||
/// Constructor.
|
||||
PeakFinder();
|
||||
|
||||
/// Detect exact peak position of the data vector by finding the largest peak 'hump'
|
||||
/// and calculating the mass-center location of the peak hump.
|
||||
///
|
||||
/// \return The location of the largest base harmonic peak hump.
|
||||
double detectPeak(const float *data, /// Data vector to be analyzed. The data vector has
|
||||
/// to be at least 'maxPos' items long.
|
||||
int minPos, ///< Min allowed peak location within the vector data.
|
||||
int maxPos ///< Max allowed peak location within the vector data.
|
||||
);
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif // _PeakFinder_H_
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// The routine detects highest value on an array of values and calculates the
|
||||
/// precise peak location as a mass-center of the 'hump' around the peak value.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2011-12-30 22:33:46 +0200 (Fri, 30 Dec 2011) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: PeakFinder.h 132 2011-12-30 20:33:46Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#ifndef _PeakFinder_H_
|
||||
#define _PeakFinder_H_
|
||||
|
||||
namespace soundtouch
|
||||
{
|
||||
|
||||
class PeakFinder
|
||||
{
|
||||
protected:
|
||||
/// Min, max allowed peak positions within the data vector
|
||||
int minPos, maxPos;
|
||||
|
||||
/// Calculates the mass center between given vector items.
|
||||
double calcMassCenter(const float *data, ///< Data vector.
|
||||
int firstPos, ///< Index of first vector item beloging to the peak.
|
||||
int lastPos ///< Index of last vector item beloging to the peak.
|
||||
) const;
|
||||
|
||||
/// Finds the data vector index where the monotoniously decreasing signal crosses the
|
||||
/// given level.
|
||||
int findCrossingLevel(const float *data, ///< Data vector.
|
||||
float level, ///< Goal crossing level.
|
||||
int peakpos, ///< Peak position index within the data vector.
|
||||
int direction /// Direction where to proceed from the peak: 1 = right, -1 = left.
|
||||
) const;
|
||||
|
||||
// Finds real 'top' of a peak hump from neighnourhood of the given 'peakpos'.
|
||||
int findTop(const float *data, int peakpos) const;
|
||||
|
||||
|
||||
/// Finds the 'ground' level, i.e. smallest level between two neighbouring peaks, to right-
|
||||
/// or left-hand side of the given peak position.
|
||||
int findGround(const float *data, /// Data vector.
|
||||
int peakpos, /// Peak position index within the data vector.
|
||||
int direction /// Direction where to proceed from the peak: 1 = right, -1 = left.
|
||||
) const;
|
||||
|
||||
/// get exact center of peak near given position by calculating local mass of center
|
||||
double getPeakCenter(const float *data, int peakpos) const;
|
||||
|
||||
public:
|
||||
/// Constructor.
|
||||
PeakFinder();
|
||||
|
||||
/// Detect exact peak position of the data vector by finding the largest peak 'hump'
|
||||
/// and calculating the mass-center location of the peak hump.
|
||||
///
|
||||
/// \return The location of the largest base harmonic peak hump.
|
||||
double detectPeak(const float *data, /// Data vector to be analyzed. The data vector has
|
||||
/// to be at least 'maxPos' items long.
|
||||
int minPos, ///< Min allowed peak location within the vector data.
|
||||
int maxPos ///< Max allowed peak location within the vector data.
|
||||
);
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif // _PeakFinder_H_
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||||
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|
||||
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|
||||
</VisualStudioProject>
|
||||
|
||||
@@ -1,137 +1,137 @@
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// Generic version of the x86 CPU extension detection routine.
|
||||
///
|
||||
/// This file is for GNU & other non-Windows compilers, see 'cpu_detect_x86_win.cpp'
|
||||
/// for the Microsoft compiler version.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2012-11-08 20:44:37 +0200 (Thu, 08 Nov 2012) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: cpu_detect_x86.cpp 159 2012-11-08 18:44:37Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#include "cpu_detect.h"
|
||||
#include "STTypes.h"
|
||||
|
||||
#if defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
|
||||
#if defined(__GNUC__) && defined(__i386__)
|
||||
// gcc
|
||||
#include "cpuid.h"
|
||||
#elif defined(_M_IX86)
|
||||
// windows non-gcc
|
||||
#include <intrin.h>
|
||||
#define bit_MMX (1 << 23)
|
||||
#define bit_SSE (1 << 25)
|
||||
#define bit_SSE2 (1 << 26)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// processor instructions extension detection routines
|
||||
//
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// Flag variable indicating whick ISA extensions are disabled (for debugging)
|
||||
static uint _dwDisabledISA = 0x00; // 0xffffffff; //<- use this to disable all extensions
|
||||
|
||||
// Disables given set of instruction extensions. See SUPPORT_... defines.
|
||||
void disableExtensions(uint dwDisableMask)
|
||||
{
|
||||
_dwDisabledISA = dwDisableMask;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/// Checks which instruction set extensions are supported by the CPU.
|
||||
uint detectCPUextensions(void)
|
||||
{
|
||||
/// If building for a 64bit system (no Itanium) and the user wants optimizations.
|
||||
/// Return the OR of SUPPORT_{MMX,SSE,SSE2}. 11001 or 0x19.
|
||||
/// Keep the _dwDisabledISA test (2 more operations, could be eliminated).
|
||||
#if ((defined(__GNUC__) && defined(__x86_64__)) \
|
||||
|| defined(_M_X64)) \
|
||||
&& defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
return 0x19 & ~_dwDisabledISA;
|
||||
|
||||
/// If building for a 32bit system and the user wants optimizations.
|
||||
/// Keep the _dwDisabledISA test (2 more operations, could be eliminated).
|
||||
#elif ((defined(__GNUC__) && defined(__i386__)) \
|
||||
|| defined(_M_IX86)) \
|
||||
&& defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
|
||||
if (_dwDisabledISA == 0xffffffff) return 0;
|
||||
|
||||
uint res = 0;
|
||||
|
||||
#if defined(__GNUC__)
|
||||
// GCC version of cpuid. Requires GCC 4.3.0 or later for __cpuid intrinsic support.
|
||||
uint eax, ebx, ecx, edx; // unsigned int is the standard type. uint is defined by the compiler and not guaranteed to be portable.
|
||||
|
||||
// Check if no cpuid support.
|
||||
if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx)) return 0; // always disable extensions.
|
||||
|
||||
if (edx & bit_MMX) res = res | SUPPORT_MMX;
|
||||
if (edx & bit_SSE) res = res | SUPPORT_SSE;
|
||||
if (edx & bit_SSE2) res = res | SUPPORT_SSE2;
|
||||
|
||||
#else
|
||||
// Window / VS version of cpuid. Notice that Visual Studio 2005 or later required
|
||||
// for __cpuid intrinsic support.
|
||||
int reg[4] = {-1};
|
||||
|
||||
// Check if no cpuid support.
|
||||
__cpuid(reg,0);
|
||||
if ((unsigned int)reg[0] == 0) return 0; // always disable extensions.
|
||||
|
||||
__cpuid(reg,1);
|
||||
if ((unsigned int)reg[3] & bit_MMX) res = res | SUPPORT_MMX;
|
||||
if ((unsigned int)reg[3] & bit_SSE) res = res | SUPPORT_SSE;
|
||||
if ((unsigned int)reg[3] & bit_SSE2) res = res | SUPPORT_SSE2;
|
||||
|
||||
#endif
|
||||
|
||||
return res & ~_dwDisabledISA;
|
||||
|
||||
#else
|
||||
|
||||
/// One of these is true:
|
||||
/// 1) We don't want optimizations.
|
||||
/// 2) Using an unsupported compiler.
|
||||
/// 3) Running on a non-x86 platform.
|
||||
return 0;
|
||||
|
||||
#endif
|
||||
}
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
///
|
||||
/// Generic version of the x86 CPU extension detection routine.
|
||||
///
|
||||
/// This file is for GNU & other non-Windows compilers, see 'cpu_detect_x86_win.cpp'
|
||||
/// for the Microsoft compiler version.
|
||||
///
|
||||
/// Author : Copyright (c) Olli Parviainen
|
||||
/// Author e-mail : oparviai 'at' iki.fi
|
||||
/// SoundTouch WWW: http://www.surina.net/soundtouch
|
||||
///
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Last changed : $Date: 2012-11-08 20:44:37 +0200 (Thu, 08 Nov 2012) $
|
||||
// File revision : $Revision: 4 $
|
||||
//
|
||||
// $Id: cpu_detect_x86.cpp 159 2012-11-08 18:44:37Z oparviai $
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// License :
|
||||
//
|
||||
// SoundTouch audio processing library
|
||||
// Copyright (c) Olli Parviainen
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU Lesser General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#include "cpu_detect.h"
|
||||
#include "STTypes.h"
|
||||
|
||||
#if defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
|
||||
#if defined(__GNUC__) && defined(__i386__)
|
||||
// gcc
|
||||
#include "cpuid.h"
|
||||
#elif defined(_M_IX86)
|
||||
// windows non-gcc
|
||||
#include <intrin.h>
|
||||
#define bit_MMX (1 << 23)
|
||||
#define bit_SSE (1 << 25)
|
||||
#define bit_SSE2 (1 << 26)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// processor instructions extension detection routines
|
||||
//
|
||||
//////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// Flag variable indicating whick ISA extensions are disabled (for debugging)
|
||||
static uint _dwDisabledISA = 0x00; // 0xffffffff; //<- use this to disable all extensions
|
||||
|
||||
// Disables given set of instruction extensions. See SUPPORT_... defines.
|
||||
void disableExtensions(uint dwDisableMask)
|
||||
{
|
||||
_dwDisabledISA = dwDisableMask;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/// Checks which instruction set extensions are supported by the CPU.
|
||||
uint detectCPUextensions(void)
|
||||
{
|
||||
/// If building for a 64bit system (no Itanium) and the user wants optimizations.
|
||||
/// Return the OR of SUPPORT_{MMX,SSE,SSE2}. 11001 or 0x19.
|
||||
/// Keep the _dwDisabledISA test (2 more operations, could be eliminated).
|
||||
#if ((defined(__GNUC__) && defined(__x86_64__)) \
|
||||
|| defined(_M_X64)) \
|
||||
&& defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
return 0x19 & ~_dwDisabledISA;
|
||||
|
||||
/// If building for a 32bit system and the user wants optimizations.
|
||||
/// Keep the _dwDisabledISA test (2 more operations, could be eliminated).
|
||||
#elif ((defined(__GNUC__) && defined(__i386__)) \
|
||||
|| defined(_M_IX86)) \
|
||||
&& defined(SOUNDTOUCH_ALLOW_X86_OPTIMIZATIONS)
|
||||
|
||||
if (_dwDisabledISA == 0xffffffff) return 0;
|
||||
|
||||
uint res = 0;
|
||||
|
||||
#if defined(__GNUC__)
|
||||
// GCC version of cpuid. Requires GCC 4.3.0 or later for __cpuid intrinsic support.
|
||||
uint eax, ebx, ecx, edx; // unsigned int is the standard type. uint is defined by the compiler and not guaranteed to be portable.
|
||||
|
||||
// Check if no cpuid support.
|
||||
if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx)) return 0; // always disable extensions.
|
||||
|
||||
if (edx & bit_MMX) res = res | SUPPORT_MMX;
|
||||
if (edx & bit_SSE) res = res | SUPPORT_SSE;
|
||||
if (edx & bit_SSE2) res = res | SUPPORT_SSE2;
|
||||
|
||||
#else
|
||||
// Window / VS version of cpuid. Notice that Visual Studio 2005 or later required
|
||||
// for __cpuid intrinsic support.
|
||||
int reg[4] = {-1};
|
||||
|
||||
// Check if no cpuid support.
|
||||
__cpuid(reg,0);
|
||||
if ((unsigned int)reg[0] == 0) return 0; // always disable extensions.
|
||||
|
||||
__cpuid(reg,1);
|
||||
if ((unsigned int)reg[3] & bit_MMX) res = res | SUPPORT_MMX;
|
||||
if ((unsigned int)reg[3] & bit_SSE) res = res | SUPPORT_SSE;
|
||||
if ((unsigned int)reg[3] & bit_SSE2) res = res | SUPPORT_SSE2;
|
||||
|
||||
#endif
|
||||
|
||||
return res & ~_dwDisabledISA;
|
||||
|
||||
#else
|
||||
|
||||
/// One of these is true:
|
||||
/// 1) We don't want optimizations.
|
||||
/// 2) Using an unsupported compiler.
|
||||
/// 3) Running on a non-x86 platform.
|
||||
return 0;
|
||||
|
||||
#endif
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user