IntSignal Playback::signalPlaytime() const
{
xmmsc_result_t* res =
call( connected_,
boost::bind( xmmsc_signal_playback_playtime, conn_ ) );
return IntSignal( res, ml_ );
}
IntSignal Playback::broadcastCurrentID() const
{
xmmsc_result_t* res =
call( connected_,
boost::bind( xmmsc_broadcast_playback_current_id, conn_ ) );
return IntSignal( res, ml_ );
}
bool RPeaksDetector::hilbertRPeaksDetection(ECGSignalChannel *signal)
{
TRI_LOG_STR(__FUNCTION__);
ECGSignalChannel sig = *signal;
if(sig->signal->size < 1)
{
#ifdef DEBUG
qDebug() << "Input signal size is 0";
#endif
TRI_LOG_STR("Input signal size is 0");
return false;
}
int n = sig->signal->size;
std::vector<double> sygnal(n);
int i = 0;
for ( ; i < n ; ++i)
sygnal[i] = gsl_vector_get (sig->signal, i);
signalAbs(sygnal);
std::vector<int> pozycje;
int czestotliwosc = 360;
hilbertDetection(sygnal, czestotliwosc, pozycje);
IntSignal rs;
rs = IntSignal(new WrappedVectorInt);
n = pozycje.size();
rs->signal = gsl_vector_int_alloc(n);
for (i = 0; i < n; ++i)
gsl_vector_int_set(rs->signal, i, pozycje.at(i));
rsPositions->setRs(rs);
#ifdef DEBUG
qDebug() << "Number of detected R-peaks:" << n;
#endif
rsDetected = true;
LOG_END;
return true;
}
bool RPeaksDetector::panTompkinsRPeaksDetection(ECGSignalChannel *signal)
{
TRI_LOG_STR(__FUNCTION__);
ECGSignalChannel sig;
sig = *signal;
int sigSize = 0;
if(sig->signal->size < 1)
{
#ifdef DEBUG
qDebug() << "Input signal size is 0";
#endif
TRI_LOG_STR("Input signal size is 0");
return false;
}
else
{
sigSize = sig->signal->size;
#ifdef DEBUG_SIGNAL
qDebug() << "Input signal";
for(int i = 0; i < sigSize; i++)
{
double inputValue = gsl_vector_get (sig->signal, i);
qDebug() << inputValue;
}
#endif
}
//Convolution [-0.125 -0.25 0.25 0.125] (Here we lose 4 signal samples)
#ifdef DEBUG
qDebug() << "Convolution [-0.125 -0.25 0.25 0.125]" << endl << "Orginal signal size: " << sigSize;
#endif
int newSigSize = 0;
ECGSignalChannel diffSig;
diffSig = ECGSignalChannel(new WrappedVector);
diffSig->signal = gsl_vector_alloc(sigSize);
double filter[] = {-0.125, -0.25, 0.25, 0.125};
int filterSize = 4;
for(int i = 0; i < sigSize - filterSize; i++)
{
double tmpSum = 0;
for(int j = 0; j < filterSize; j++)
{
double inputValue = gsl_vector_get (sig->signal, i + j);
tmpSum += inputValue * filter[j];
#ifdef DEBUG_SIGNAL_DETAILS
qDebug() << "Signal: " << inputValue << " Filter: " << filter[j] << " Sum: " << tmpSum;
#endif
}
#ifdef DEBUG_SIGNAL
qDebug() << "Final val: " << tmpSum << " at index: " << i;
#endif
gsl_vector_set(diffSig->signal, i, tmpSum);
newSigSize++;
}
//Exponentiation
sigSize = newSigSize;
#ifdef DEBUG
qDebug() << "Exponentiation ^2" << endl << "Signal size after convolution: " << sigSize;
#endif
ECGSignalChannel powSig;
powSig = ECGSignalChannel(new WrappedVector);
powSig->signal = gsl_vector_alloc(sigSize);
for(int i = 0; i < sigSize; i++)
{
double inputValue = gsl_vector_get (diffSig->signal, i);
double powVal = pow(inputValue, 2);
gsl_vector_set(powSig->signal, i, powVal);
#ifdef DEBUG_SIGNAL
qDebug() << " Pow: "<< powVal << " at index: " << i;
#endif
}
//Calculae moving window lenght or use custom value
// N=30 for f=200Hz - from literature
// N=24 for f=360Hz - from literature and tests
// Linear function for calculating window lenght
// wl = -0.0375 * fs + 37.5
if(panTompkinsMovinghWindowLenght == 0)
{
panTompkinsMovinghWindowLenght = -0.0375 * signalFrequency + 37.5;
}
//Moving window integration (Here we lose "movinghWindowLenght" signal samples)
#ifdef DEBUG
qDebug() << "Moving window integration" << endl << "Window size: " << panTompkinsMovinghWindowLenght << endl
<< "Signal size after exponentiation: " << sigSize;
#endif
ECGSignalChannel integrSig;
integrSig = ECGSignalChannel(new WrappedVector);
integrSig->signal = gsl_vector_alloc(sigSize);
newSigSize = 0;
int movinghWindowLenght = panTompkinsMovinghWindowLenght;
double tmpSum = 0;
for(int i = movinghWindowLenght; i < sigSize; i++)
{
for(int j = movinghWindowLenght - 1; j >= 0 ; j--)
{
double inputValue = gsl_vector_get (powSig->signal, i - j);
tmpSum += inputValue;
#ifdef DEBUG_SIGNAL_DETAILS
qDebug() << "Signal: " << inputValue << " Sum: " << tmpSum;
#endif
}
int index = i - movinghWindowLenght;
// TODO Why this is not working? (To small values and all are save as zero)
//double mwico = (1/movinghWindowLenght) * tmpSum;
double mwico = tmpSum;
#ifdef DEBUG_SIGNAL
qDebug() << "Final val: " << mwico << " at index: " << index;
#endif
gsl_vector_set(integrSig->signal, index, mwico);
tmpSum = 0;
newSigSize++;
}
//Calculating detection threshold
//TODO (Not important now) Try to find another way to calcutale threshold position, maybe dynamic threshold?
sigSize = newSigSize;
#ifdef DEBUG
qDebug() << "Calculating detection threshold" << endl << "After moving window integration signal size: " << sigSize;
#endif
double sigMaxVal = 0;
double meanVal = 0;
for(int i = 0; i < sigSize; i++)
{
double inputValue = gsl_vector_get (integrSig->signal, i);
if(inputValue > sigMaxVal)
{
sigMaxVal = inputValue;
#ifdef DEBUG_SIGNAL
qDebug() << "New max signal value: " << inputValue;
#endif
}
meanVal += inputValue;
}
meanVal = meanVal / sigSize;
#ifdef DEBUG
qDebug() << "Final max value for channel one: " << sigMaxVal << endl
<< "Final mean value: " << meanVal << endl;
#endif
// Select automatic or manual thersold
double threshold = 0;
if( this->panTompkinsThershold == 0)
{
threshold = meanVal + (sigMaxVal * 0.04);
}
else
{
threshold = this->panTompkinsThershold;
}
//Looking for points over thersold
#ifdef DEBUG
qDebug() << "Current thresold value: " << threshold << endl << "Looking for points over thersold";
#endif
ECGSignalChannel overThersold;
overThersold = ECGSignalChannel(new WrappedVector);
overThersold->signal = gsl_vector_alloc(sigSize);
for(int i = 0; i < sigSize; i++)
{
double inputValue = gsl_vector_get (integrSig->signal, i);
if(inputValue > threshold * sigMaxVal)
{
gsl_vector_set(overThersold->signal, i, 1);
#ifdef DEBUG_SIGNAL
qDebug() << "Value over thersold at index: " << i;
#endif
}
else
{
gsl_vector_set(overThersold->signal, i, 0);
}
}
#ifdef DEBUG_SIGNAL
qDebug() << "Signal with points over thersold";
for(int i = 0; i < sigSize; i++)
{
qDebug() << gsl_vector_get(overThersold->signal, i);
}
#endif
#ifdef DEBUG
qDebug() << "Detect begin and end of QRS complex";
#endif
ECGSignalChannel leftPoints;
ECGSignalChannel tmpRightPoints;
leftPoints = ECGSignalChannel(new WrappedVector);
tmpRightPoints = ECGSignalChannel(new WrappedVector);
leftPoints->signal = gsl_vector_alloc(sigSize);
tmpRightPoints->signal = gsl_vector_alloc(sigSize);
int leftPointsCount = 0;
int rightPointsCount = 0;
gsl_vector* copiedSig = gsl_vector_calloc(sigSize);
gsl_vector_memcpy(copiedSig, overThersold->signal);
// Boundary values
if(gsl_vector_get (copiedSig, 0) == 1)
{
gsl_vector_set(leftPoints->signal, leftPointsCount, 0);
leftPointsCount++;
#ifdef DEBUG_SIGNAL
qDebug() << "QRS complex left point at index: " << 0;
#endif
}
if(gsl_vector_get (copiedSig, sigSize - 1) == 1)
{
gsl_vector_set(tmpRightPoints->signal, rightPointsCount, sigSize - 1);
rightPointsCount++;
#ifdef DEBUG_SIGNAL
qDebug() << "QRS complex right point at index: " << sigSize - 1;
#endif
}
// Left points of QRS complex
for(int i = 0; i < sigSize - 1; i++)
{
double inputValue = gsl_vector_get (copiedSig, i);
double inputValueIndexPlus = gsl_vector_get (copiedSig, i + 1);
if((inputValueIndexPlus - inputValue) == 1)
{
gsl_vector_set(leftPoints->signal, leftPointsCount, i);
leftPointsCount++;
#ifdef DEBUG_SIGNAL
qDebug() << "QRS complex left point at index: " << i;
#endif
}
}
// Rights points of QRS complex
for(int i = sigSize - 1; i > 0; i--)
{
double reversedInput = gsl_vector_get(copiedSig, i);
double reversedInputIndexMinus = gsl_vector_get (copiedSig, i - 1);
if((reversedInputIndexMinus - reversedInput) == 1)
{
gsl_vector_set(tmpRightPoints->signal, rightPointsCount, i);
rightPointsCount++;
#ifdef DEBUG_SIGNAL
qDebug() << "QRS complex right at index: " << i;
#endif
}
}
#ifdef DEBUG_SIGNAL
cout << "Vector with left points:" << endl;
for(int i = 0; i < leftPointsCount; i++)
{
qDebug() << gsl_vector_get(leftPoints->signal, i);
}
qDebug() << endl << "Vector with right points:";
for(int i = 0; i < rightPointsCount; i++)
{
qDebug() << gsl_vector_get(tmpRightPoints->signal, i);
}
cout << endl;
#endif
// Invert vector with rightPoints
ECGSignalChannel rightPoints;
rightPoints = ECGSignalChannel(new WrappedVector);
rightPoints->signal = gsl_vector_alloc(sigSize);
for(int i = 0; i < rightPointsCount; i++)
{
double tmp = gsl_vector_get(tmpRightPoints->signal, rightPointsCount - i - 1);
gsl_vector_set(rightPoints->signal, i, tmp );
}
for(int i = 0; i < rightPointsCount; i++)
{
double tmp = gsl_vector_get(tmpRightPoints->signal, rightPointsCount - i - 1);
gsl_vector_set(rightPoints->signal, i, tmp );
}
#ifdef DEBUG_SIGNAL
qDebug() << "After vector invertion" << endl;
qDebug() << "Vector with left points:" << endl;
for(int i = 0; i < leftPointsCount; i++)
{
qDebug() << gsl_vector_get(leftPoints->signal, i);
}
qDebug() << endl << "Vector with right points:" << endl;
for(int i = 0; i < rightPointsCount; i++)
{
qDebug() << gsl_vector_get(rightPoints->signal, i);
}
#endif
#ifdef DEBUG
qDebug() << "Number of left points: " << leftPointsCount << endl
<< "Number of right points: " << rightPointsCount;
#endif
//Final R peaks detection
#ifdef DEBUG
qDebug() << "Final R peaks detection";
#endif
int partLength;
IntSignal rs;
int numberRs = 0;
if(leftPointsCount > 0 )
{
rs = IntSignal(new WrappedVectorInt);
rs->signal = gsl_vector_int_alloc(leftPointsCount);
for(int i = 0; i < leftPointsCount; i++)
{
partLength = gsl_vector_get (rightPoints->signal, i) - gsl_vector_get(leftPoints->signal, i);
double tmpMax = 0;
int tmpMaxIndex = 0;
for(int j = 0; j < partLength; j++)
{
int sigIndex = gsl_vector_get (leftPoints->signal, i) + j;
double sigVal = gsl_vector_get(sig->signal, sigIndex);
if(sigVal > tmpMax)
{
tmpMax = sigVal;
tmpMaxIndex = sigIndex;
}
}
gsl_vector_int_set(rs->signal, i, tmpMaxIndex);
numberRs++;
#ifdef DEBUG_SIGNAL
qDebug() << "R point at index: " << tmpMaxIndex
<< " signal value: " << gsl_vector_get(sig->signal, tmpMaxIndex);
#endif
}
rsPositions->setRs(rs);
#ifdef DEBUG
qDebug() << "Number of detected R-peaks:" << numberRs;
#endif
}
else
{
#ifdef DEBUG
qDebug() << "R peaks not detected. Check input signal.";
#endif
TRI_LOG_STR("R peaks not detected. Check input signal.");
return false;
}
gsl_vector_free(copiedSig);
rsDetected = true;
#ifdef DEBUG
qDebug() << "Done";
#endif
LOG_END;
return true;
}
