void Clip::load(const QString &fileName, const char* format) {
QString ffmpegExe = settings->ffmpegExecutable();
if(ffmpegExe.isEmpty()) {
return;
}
// Get resolution from ffmpeg (so we don't have to ask videoplayer)
QString command = "\"" + ffmpegExe + "\"" + " -i " + "\"" + fileName + "\"";
QProcess process;
process.start(command);
process.waitForFinished(100);
QByteArray out = process.readAllStandardError();
process.close();
QRegExp expResolution("[0-9]+x[0-9]+");
QRegExp expWidth("[0-9]+\\B");
QRegExp expHeight("\\B+[0-9]+$");
expResolution.indexIn(out);
QString res = expResolution.cap();
expWidth.indexIn(res);
expHeight.indexIn(res);
QString wt = expWidth.cap();
QString ht = expHeight.cap();
path = fileName;
extension = format;
srcWidth = wt.toInt();
srcHeight = ht.toInt();
grad = 0;
frame = QRect(0,0,srcWidth, srcHeight);
}
void BackToBackExponential::function1D(double* out, const double* xValues, const size_t nData)const
{
/*
const double& I = getParameter("I");
const double& a = getParameter("A");
const double& b = getParameter("B");
const double& x0 = getParameter("X0");
const double& s = getParameter("S");
*/
const double I = getParameter(0);
const double a = getParameter(1);
const double b = getParameter(2);
const double x0 = getParameter(3);
const double s = getParameter(4);
// find the reasonable extent of the peak ~100 fwhm
double extent = expWidth();
if ( s > extent ) extent = s;
extent *= 100;
double s2 = s*s;
double normFactor = a * b / (a + b) / 2;
//Needed for IntegratePeaksMD for cylinder profile fitted with b=0
if (normFactor == 0.0) normFactor = 1.0;
for (size_t i = 0; i < nData; i++) {
double diff=xValues[i]-x0;
if ( fabs(diff) < extent )
{
double val = 0.0;
double arg1 = a/2*(a*s2+2*diff);
val += exp( arg1 + gsl_sf_log_erfc((a*s2+diff)/sqrt(2*s2)) ); //prevent overflow
double arg2 = b/2*(b*s2-2*diff);
val += exp( arg2 + gsl_sf_log_erfc((b*s2-diff)/sqrt(2*s2)) ); //prevent overflow
out[i] = I*val*normFactor;
}
else
out[i] = 0.0;
}
}