c@259: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
c@259:
c@232: // GetKeyMode.cpp: implementation of the CGetKeyMode class.
c@232: //
c@232: //////////////////////////////////////////////////////////////////////
c@232:
c@232: #include "GetKeyMode.h"
c@241: #include "maths/MathUtilities.h"
c@234: #include "base/Pitch.h"
c@234:
c@234: #include <iostream>
c@232:
c@272: #include <cstring>
c@272: #include <cstdlib>
c@272:
c@232: // Chords profile
c@232: static double MajProfile[36] =
c@232: { 0.0384, 0.0629, 0.0258, 0.0121, 0.0146, 0.0106, 0.0364, 0.0610, 0.0267,
devnull@240: 0.0126, 0.0121, 0.0086, 0.0364, 0.0623, 0.0279, 0.0275, 0.0414, 0.0186,
c@232: 0.0173, 0.0248, 0.0145, 0.0364, 0.0631, 0.0262, 0.0129, 0.0150, 0.0098,
c@232: 0.0312, 0.0521, 0.0235, 0.0129, 0.0142, 0.0095, 0.0289, 0.0478, 0.0239};
c@232:
c@232: static double MinProfile[36] =
c@232: { 0.0375, 0.0682, 0.0299, 0.0119, 0.0138, 0.0093, 0.0296, 0.0543, 0.0257,
c@232: 0.0292, 0.0519, 0.0246, 0.0159, 0.0234, 0.0135, 0.0291, 0.0544, 0.0248,
c@232: 0.0137, 0.0176, 0.0104, 0.0352, 0.0670, 0.0302, 0.0222, 0.0349, 0.0164,
c@232: 0.0174, 0.0297, 0.0166, 0.0222, 0.0401, 0.0202, 0.0175, 0.0270, 0.0146};
c@232: //
c@265:
c@232:
c@232: //////////////////////////////////////////////////////////////////////
c@232: // Construction/Destruction
c@232: //////////////////////////////////////////////////////////////////////
c@232:
c@234: GetKeyMode::GetKeyMode( int sampleRate, float tuningFrequency,
c@259: double hpcpAverage, double medianAverage ) :
c@259: m_hpcpAverage( hpcpAverage ),
c@259: m_medianAverage( medianAverage ),
c@259: m_ChrPointer(0),
c@259: m_DecimatedBuffer(0),
c@259: m_ChromaBuffer(0),
c@259: m_MeanHPCP(0),
c@259: m_MajCorr(0),
c@259: m_MinCorr(0),
c@259: m_Keys(0),
c@259: m_MedianFilterBuffer(0),
c@265: m_SortedBuffer(0),
c@265: m_keyStrengths(0)
c@232: {
c@259: m_DecimationFactor = 8;
c@259:
c@259: // Chromagram configuration parameters
c@259: m_ChromaConfig.normalise = MathUtilities::NormaliseUnitMax;
c@259: m_ChromaConfig.FS = lrint(sampleRate/(double)m_DecimationFactor);
c@283: if (m_ChromaConfig.FS < 1) m_ChromaConfig.FS = 1;
c@232:
c@259: // Set C (= MIDI #12) as our base :
c@259: // This implies that key = 1 => Cmaj, key = 12 => Bmaj, key = 13 => Cmin, etc.
c@259: m_ChromaConfig.min = Pitch::getFrequencyForPitch
c@265: (48, 0, tuningFrequency);
c@259: m_ChromaConfig.max = Pitch::getFrequencyForPitch
c@259: (96, 0, tuningFrequency);
c@234:
c@259: m_ChromaConfig.BPO = 36;
c@259: m_ChromaConfig.CQThresh = 0.0054;
c@234:
c@259: // Chromagram inst.
c@259: m_Chroma = new Chromagram( m_ChromaConfig );
c@235:
c@259: // Get calculated parameters from chroma object
c@259: m_ChromaFrameSize = m_Chroma->getFrameSize();
c@259: // override hopsize for this application
c@259: m_ChromaHopSize = m_ChromaFrameSize;
c@259: m_BPO = m_ChromaConfig.BPO;
c@235:
c@265: // std::cerr << "chroma frame size = " << m_ChromaFrameSize << ", decimation factor = " << m_DecimationFactor << " therefore block size = " << getBlockSize() << std::endl;
c@265:
c@259: // Chromagram average and estimated key median filter lengths
c@259: m_ChromaBuffersize = (int)ceil( m_hpcpAverage * m_ChromaConfig.FS/m_ChromaFrameSize );
c@259: m_MedianWinsize = (int)ceil( m_medianAverage * m_ChromaConfig.FS/m_ChromaFrameSize );
c@259:
c@259: // Reset counters
c@259: m_bufferindex = 0;
c@259: m_ChromaBufferFilling = 0;
c@259: m_MedianBufferFilling = 0;
c@234:
c@259: // Spawn objectc/arrays
c@259: m_DecimatedBuffer = new double[m_ChromaFrameSize];
c@259:
c@259: m_ChromaBuffer = new double[m_BPO * m_ChromaBuffersize];
c@259: memset( m_ChromaBuffer, 0, sizeof(double) * m_BPO * m_ChromaBuffersize);
c@259:
c@259: m_MeanHPCP = new double[m_BPO];
c@259:
c@259: m_MajCorr = new double[m_BPO];
c@259: m_MinCorr = new double[m_BPO];
c@259: m_Keys = new double[2*m_BPO];
c@259:
c@259: m_MedianFilterBuffer = new int[ m_MedianWinsize ];
c@259: memset( m_MedianFilterBuffer, 0, sizeof(int)*m_MedianWinsize);
c@259:
c@259: m_SortedBuffer = new int[ m_MedianWinsize ];
c@259: memset( m_SortedBuffer, 0, sizeof(int)*m_MedianWinsize);
c@259:
c@259: m_Decimator = new Decimator
c@259: ( m_ChromaFrameSize*m_DecimationFactor, m_DecimationFactor );
c@265:
c@265: m_keyStrengths = new double[24];
c@232: }
c@232:
c@232: GetKeyMode::~GetKeyMode()
c@232: {
c@232:
c@259: delete m_Chroma;
c@259: delete m_Decimator;
c@259:
c@259: delete [] m_DecimatedBuffer;
c@259: delete [] m_ChromaBuffer;
c@259: delete [] m_MeanHPCP;
c@259: delete [] m_MajCorr;
c@259: delete [] m_MinCorr;
c@259: delete [] m_Keys;
c@259: delete [] m_MedianFilterBuffer;
c@259: delete [] m_SortedBuffer;
c@265:
c@265: delete[] m_keyStrengths;
c@232: }
c@232:
c@232: double GetKeyMode::krumCorr(double *pData1, double *pData2, unsigned int length)
c@232: {
c@259: double retVal= 0.0;
c@259:
c@259: double num = 0;
c@259: double den = 0;
c@259: double mX = MathUtilities::mean( pData1, length );
c@259: double mY = MathUtilities::mean( pData2, length );
c@259:
c@259: double sum1 = 0;
c@259: double sum2 = 0;
c@259:
c@259: for( unsigned int i = 0; i <length; i++ )
c@259: {
c@259: num += ( pData1[i] - mX ) * ( pData2[i] - mY );
c@232:
c@259: sum1 += ( (pData1[i]-mX) * (pData1[i]-mX) );
c@259: sum2 += ( (pData2[i]-mY) * (pData2[i]-mY) );
c@259: }
c@259:
c@259: den = sqrt(sum1 * sum2);
c@259:
c@259: if( den>0 )
c@259: retVal = num/den;
c@259: else
c@259: retVal = 0;
c@232:
c@232:
c@259: return retVal;
c@232: }
c@232:
c@232: int GetKeyMode::process(double *PCMData)
c@232: {
c@259: int key;
c@232:
c@259: unsigned int j,k;
c@232:
c@259: //////////////////////////////////////////////
c@259: m_Decimator->process( PCMData, m_DecimatedBuffer);
c@232:
c@259: m_ChrPointer = m_Chroma->process( m_DecimatedBuffer );
c@232:
devnull@240:
c@259: // Move bins such that the centre of the base note is in the
c@259: // middle of its three bins :
c@259: // Added 21.11.07 by Chris Sutton based on debugging with Katy
c@259: // Noland + comparison with Matlab equivalent.
c@259: MathUtilities::circShift( m_ChrPointer, m_BPO, 1);
c@248: /*
c@298: std::cout << "raw chroma: ";
c@298: for (int ii = 0; ii < m_BPO; ++ii) {
c@298: if (ii % (m_BPO/12) == 0) std::cout << "\n";
c@298: std::cout << m_ChrPointer[ii] << " ";
c@298: }
c@298: std::cout << std::endl;
c@248: */
c@259: // populate hpcp values;
c@259: int cbidx;
c@259: for( j = 0; j < m_BPO; j++ )
c@259: {
c@259: cbidx = (m_bufferindex * m_BPO) + j;
c@259: m_ChromaBuffer[ cbidx ] = m_ChrPointer[j];
c@259: }
c@232:
c@259: //keep track of input buffers;
c@259: if( m_bufferindex++ >= m_ChromaBuffersize - 1)
c@259: m_bufferindex = 0;
c@232:
c@259: // track filling of chroma matrix
c@259: if( m_ChromaBufferFilling++ >= m_ChromaBuffersize)
c@259: m_ChromaBufferFilling = m_ChromaBuffersize;
c@232:
c@259: //calculate mean
c@259: for( k = 0; k < m_BPO; k++ )
c@259: {
c@259: double mnVal = 0.0;
c@259: for( j = 0; j < m_ChromaBufferFilling; j++ )
c@259: {
c@259: mnVal += m_ChromaBuffer[ k + (j*m_BPO) ];
c@259: }
c@232:
c@259: m_MeanHPCP[k] = mnVal/(double)m_ChromaBufferFilling;
c@259: }
c@232:
c@232:
c@259: for( k = 0; k < m_BPO; k++ )
c@259: {
c@259: m_MajCorr[k] = krumCorr( m_MeanHPCP, MajProfile, m_BPO );
c@259: m_MinCorr[k] = krumCorr( m_MeanHPCP, MinProfile, m_BPO );
c@232:
c@259: MathUtilities::circShift( MajProfile, m_BPO, 1 );
c@259: MathUtilities::circShift( MinProfile, m_BPO, 1 );
c@259: }
devnull@240:
c@259: for( k = 0; k < m_BPO; k++ )
c@259: {
c@259: m_Keys[k] = m_MajCorr[k];
c@259: m_Keys[k+m_BPO] = m_MinCorr[k];
c@259: }
devnull@240:
c@265: for (k = 0; k < 24; ++k) {
c@265: m_keyStrengths[k] = 0;
c@265: }
c@265:
c@265: for( k = 0; k < m_BPO*2; k++ )
c@265: {
c@298: int idx = k / (m_BPO/12);
c@298: int rem = k % (m_BPO/12);
c@298: if (rem == 0 || m_Keys[k] > m_keyStrengths[idx]) {
c@298: m_keyStrengths[idx] = m_Keys[k];
c@298: }
c@298:
c@298: // m_keyStrengths[k/(m_BPO/12)] += m_Keys[k];
c@265: }
devnull@240:
c@248: /*
c@259: std::cout << "raw keys: ";
c@259: for (int ii = 0; ii < 2*m_BPO; ++ii) {
c@298: if (ii % (m_BPO/12) == 0) std::cout << "\n";
c@298: std::cout << m_Keys[ii] << " ";
c@298: }
c@298: std::cout << std::endl;
c@298:
c@298: std::cout << "key strengths: ";
c@298: for (int ii = 0; ii < 24; ++ii) {
c@298: if (ii % 6 == 0) std::cout << "\n";
c@298: std::cout << m_keyStrengths[ii] << " ";
c@259: }
c@259: std::cout << std::endl;
c@248: */
c@259: double dummy;
c@259: // '1 +' because we number keys 1-24, not 0-23.
c@259: key = 1 + (int)ceil( (double)MathUtilities::getMax( m_Keys, 2* m_BPO, &dummy )/3 );
c@234:
c@298: // std::cout << "key pre-sorting: " << key << std::endl;
c@232:
c@232:
c@259: //Median filtering
c@232:
c@259: // track Median buffer initial filling
c@259: if( m_MedianBufferFilling++ >= m_MedianWinsize)
c@259: m_MedianBufferFilling = m_MedianWinsize;
c@232:
c@259: //shift median buffer
c@259: for( k = 1; k < m_MedianWinsize; k++ )
c@259: {
c@259: m_MedianFilterBuffer[ k - 1 ] = m_MedianFilterBuffer[ k ];
c@259: }
c@232:
c@259: //write new key value into median buffer
c@259: m_MedianFilterBuffer[ m_MedianWinsize - 1 ] = key;
c@232:
c@232:
c@259: //Copy median into sorting buffer, reversed
c@259: unsigned int ijx = 0;
c@259: for( k = 0; k < m_MedianWinsize; k++ )
c@259: {
c@259: m_SortedBuffer[k] = m_MedianFilterBuffer[m_MedianWinsize-1-ijx];
c@259: ijx++;
c@259: }
c@232:
c@259: qsort(m_SortedBuffer, m_MedianBufferFilling, sizeof(unsigned int),
c@259: MathUtilities::compareInt);
c@259: /*
c@259: std::cout << "sorted: ";
c@259: for (int ii = 0; ii < m_MedianBufferFilling; ++ii) {
c@259: std::cout << m_SortedBuffer[ii] << " ";
c@259: }
c@259: std::cout << std::endl;
c@259: */
c@259: int sortlength = m_MedianBufferFilling;
c@259: int midpoint = (int)ceil((double)sortlength/2);
c@232:
c@298: // std::cout << "midpoint = " << midpoint << endl;
c@298:
c@259: if( midpoint <= 0 )
c@259: midpoint = 1;
c@232:
c@259: key = m_SortedBuffer[midpoint-1];
c@232:
c@298: // std::cout << "returning key = " << key << endl;
c@298:
c@259: return key;
c@232: }
c@232:
c@232:
c@268: bool GetKeyMode::isModeMinor( int key )
c@232: {
c@259: return (key > 12);
c@232: }