void Sound_setZero (Sound me, double tmin_in, double tmax_in, int roundTimesToNearestZeroCrossing) {
Function_unidirectionalAutowindow (me, & tmin_in, & tmax_in);
Function_intersectRangeWithDomain (me, & tmin_in, & tmax_in);
for (long channel = 1; channel <= my ny; channel ++) {
double tmin = tmin_in, tmax = tmax_in;
if (roundTimesToNearestZeroCrossing) {
if (tmin > my xmin) tmin = Sound_getNearestZeroCrossing (me, tmin_in, channel);
if (tmax < my xmax) tmax = Sound_getNearestZeroCrossing (me, tmax_in, channel);
}
if (tmin == NUMundefined) tmin = my xmin;
if (tmax == NUMundefined) tmax = my xmax;
long imin, imax;
Sampled_getWindowSamples (me, tmin, tmax, & imin, & imax);
for (long i = imin; i <= imax; i ++) {
my z [channel] [i] = 0.0;
}
}
}
double Sampled_getQuantile (I, double xmin, double xmax, double quantile, long ilevel, int unit) {
iam (Sampled);
long i, imin, imax, numberOfDefinedSamples = 0;
double *values = NUMdvector (1, my nx), result = NUMundefined;
iferror return NUMundefined;
Function_unidirectionalAutowindow (me, & xmin, & xmax);
if (! Function_intersectRangeWithDomain (me, & xmin, & xmax)) return NUMundefined;
Sampled_getWindowSamples (me, xmin, xmax, & imin, & imax);
for (i = imin; i <= imax; i ++) {
double value = our getValueAtSample (me, i, ilevel, unit);
if (NUMdefined (value)) {
values [++ numberOfDefinedSamples] = value;
}
}
if (numberOfDefinedSamples >= 1) {
NUMsort_d (numberOfDefinedSamples, values);
result = NUMquantile (numberOfDefinedSamples, values, quantile);
}
NUMdvector_free (values, 1);
return result;
}
double Sampled_getQuantile (Sampled me, double xmin, double xmax, double quantile, long ilevel, int unit) {
try {
autoNUMvector <double> values (1, my nx);
Function_unidirectionalAutowindow (me, & xmin, & xmax);
if (! Function_intersectRangeWithDomain (me, & xmin, & xmax)) return NUMundefined;
long imin, imax, numberOfDefinedSamples = 0;
Sampled_getWindowSamples (me, xmin, xmax, & imin, & imax);
for (long i = imin; i <= imax; i ++) {
double value = my v_getValueAtSample (i, ilevel, unit);
if (NUMdefined (value)) {
values [++ numberOfDefinedSamples] = value;
}
}
double result = NUMundefined;
if (numberOfDefinedSamples >= 1) {
NUMsort_d (numberOfDefinedSamples, values.peek());
result = NUMquantile (numberOfDefinedSamples, values.peek(), quantile);
}
return result;
} catch (MelderError) {
Melder_throw (me, ": quantile not computed.");
}
}
void Sampled_getMaximumAndX (Sampled me, double xmin, double xmax, long ilevel, int unit, int interpolate,
double *return_maximum, double *return_xOfMaximum)
{
long imin, imax, i;
double maximum = -1e301, xOfMaximum = 0.0;
if (xmin == NUMundefined || xmax == NUMundefined) {
maximum = xOfMaximum = NUMundefined;
goto end;
}
Function_unidirectionalAutowindow (me, & xmin, & xmax);
if (! Function_intersectRangeWithDomain (me, & xmin, & xmax)) {
maximum = xOfMaximum = NUMundefined; // requested range and logical domain do not intersect
goto end;
}
if (! Sampled_getWindowSamples (me, xmin, xmax, & imin, & imax)) {
/*
* No sample centres between tmin and tmax.
* Try to return the greater of the values at these two points.
*/
double fleft = Sampled_getValueAtX (me, xmin, ilevel, unit, interpolate);
double fright = Sampled_getValueAtX (me, xmax, ilevel, unit, interpolate);
if (NUMdefined (fleft) && fleft > maximum) maximum = fleft, xOfMaximum = xmin;
if (NUMdefined (fright) && fright > maximum) maximum = fright, xOfMaximum = xmax;
} else {
for (i = imin; i <= imax; i ++) {
double fmid = my v_getValueAtSample (i, ilevel, unit);
if (fmid == NUMundefined) continue;
if (interpolate == FALSE) {
if (fmid > maximum) maximum = fmid, xOfMaximum = i;
} else {
/*
* Try an interpolation, possibly even taking into account a sample just outside the selection.
*/
double fleft = i <= 1 ? NUMundefined : my v_getValueAtSample (i - 1, ilevel, unit);
double fright = i >= my nx ? NUMundefined : my v_getValueAtSample (i + 1, ilevel, unit);
if (fleft == NUMundefined || fright == NUMundefined) {
if (fmid > maximum) maximum = fmid, xOfMaximum = i;
} else if (fmid > fleft && fmid >= fright) {
double y [4], i_real, localMaximum;
y [1] = fleft, y [2] = fmid, y [3] = fright;
localMaximum = NUMimproveMaximum (y, 3, 2, NUM_PEAK_INTERPOLATE_PARABOLIC, & i_real);
if (localMaximum > maximum)
maximum = localMaximum, xOfMaximum = i_real + i - 2;
}
}
}
xOfMaximum = my x1 + (xOfMaximum - 1) * my dx; /* From index plus phase to time. */
/* Check boundary values. */
if (interpolate) {
double fleft = Sampled_getValueAtX (me, xmin, ilevel, unit, TRUE);
double fright = Sampled_getValueAtX (me, xmax, ilevel, unit, TRUE);
if (NUMdefined (fleft) && fleft > maximum) maximum = fleft, xOfMaximum = xmin;
if (NUMdefined (fright) && fright > maximum) maximum = fright, xOfMaximum = xmax;
}
if (xOfMaximum < xmin) xOfMaximum = xmin;
if (xOfMaximum > xmax) xOfMaximum = xmax;
}
if (maximum == -1e301) maximum = xOfMaximum = NUMundefined;
end:
if (return_maximum) *return_maximum = maximum;
if (return_xOfMaximum) *return_xOfMaximum = xOfMaximum;
}
static void Sampled_getSum2AndDefinitionRange
(Sampled me, double xmin, double xmax, long ilevel, int unit, double mean, int interpolate, double *return_sum2, double *return_definitionRange)
{
/*
This function computes the area under the linearly interpolated squared difference curve between xmin and xmax.
Outside [x1-dx/2, xN+dx/2], the curve is undefined and neither times nor values are counted.
In [x1-dx/2,x1] and [xN,xN+dx/2], the curve is linearly extrapolated.
*/
long imin, imax, isamp;
double sum2 = 0.0, definitionRange = 0.0;
Function_unidirectionalAutowindow (me, & xmin, & xmax);
if (Function_intersectRangeWithDomain (me, & xmin, & xmax)) {
if (interpolate) {
if (Sampled_getWindowSamples (me, xmin, xmax, & imin, & imax)) {
double leftEdge = my x1 - 0.5 * my dx, rightEdge = leftEdge + my nx * my dx;
for (isamp = imin; isamp <= imax; isamp ++) {
double value = my v_getValueAtSample (isamp, ilevel, unit); // a fast way to integrate a linearly interpolated curve; works everywhere except at the edges
if (NUMdefined (value)) {
value -= mean;
value *= value;
definitionRange += 1.0;
sum2 += value;
}
}
/*
* Corrections within the first and last sampling intervals.
*/
if (xmin > leftEdge) { // otherwise, constant extrapolation over 0.5 sample is OK
double phase = (my x1 + (imin - 1) * my dx - xmin) / my dx; // this fraction of sampling interval is still to be determined
double rightValue = Sampled_getValueAtSample (me, imin, ilevel, unit);
double leftValue = Sampled_getValueAtSample (me, imin - 1, ilevel, unit);
if (NUMdefined (rightValue)) {
rightValue -= mean;
rightValue *= rightValue;
definitionRange -= 0.5; // delete constant extrapolation over 0.5 sample
sum2 -= 0.5 * rightValue;
if (NUMdefined (leftValue)) {
leftValue -= mean;
leftValue *= leftValue;
definitionRange += phase; // add current fraction
sum2 += phase * (rightValue + 0.5 * phase * (leftValue - rightValue)); // interpolate to outside sample
} else {
if (phase > 0.5) phase = 0.5;
definitionRange += phase; // add current fraction, but never more than 0.5
sum2 += phase * rightValue;
}
} else if (NUMdefined (leftValue) && phase > 0.5) {
leftValue -= mean;
leftValue *= leftValue;
definitionRange += phase - 0.5;
sum2 += (phase - 0.5) * leftValue;
}
}
if (xmax < rightEdge) { // otherwise, constant extrapolation is OK
double phase = (xmax - (my x1 + (imax - 1) * my dx)) / my dx; // this fraction of sampling interval is still to be determined
double leftValue = Sampled_getValueAtSample (me, imax, ilevel, unit);
double rightValue = Sampled_getValueAtSample (me, imax + 1, ilevel, unit);
if (NUMdefined (leftValue)) {
leftValue -= mean;
leftValue *= leftValue;
definitionRange -= 0.5; // delete constant extrapolation over 0.5 sample
sum2 -= 0.5 * leftValue;
if (NUMdefined (rightValue)) {
rightValue -= mean;
rightValue *= rightValue;
definitionRange += phase; // add current fraction
sum2 += phase * (leftValue + 0.5 * phase * (rightValue - leftValue)); // interpolate to outside sample
} else {
if (phase > 0.5) phase = 0.5;
definitionRange += phase; // add current fraction, but never more than 0.5
sum2 += phase * leftValue;
}
} else if (NUMdefined (rightValue) && phase > 0.5) {
rightValue -= mean;
rightValue *= rightValue;
definitionRange += phase - 0.5;
sum2 += (phase - 0.5) * rightValue;
}
}
} else { // no sample centres between xmin and xmax
/*
* Try to return the mean of the interpolated values at these two points.
* Thus, a small (xmin, xmax) range gives the same value as the (xmin+xmax)/2 point.
*/
double leftValue = Sampled_getValueAtSample (me, imax, ilevel, unit);
double rightValue = Sampled_getValueAtSample (me, imin, ilevel, unit);
double phase1 = (xmin - (my x1 + (imax - 1) * my dx)) / my dx;
double phase2 = (xmax - (my x1 + (imax - 1) * my dx)) / my dx;
if (imin == imax + 1) { // not too far from sample definition region
if (NUMdefined (leftValue)) {
leftValue -= mean;
leftValue *= leftValue;
if (NUMdefined (rightValue)) {
rightValue -= mean;
rightValue *= rightValue;
definitionRange += phase2 - phase1;
sum2 += (phase2 - phase1) * (leftValue + 0.5 * (phase1 + phase2) * (rightValue - leftValue));
} else if (phase1 < 0.5) {
if (phase2 > 0.5) phase2 = 0.5;
definitionRange += phase2 - phase1;
sum2 += (phase2 - phase1) * leftValue;
}
} else if (NUMdefined (rightValue) && phase2 > 0.5) {
rightValue -= mean;
rightValue *= rightValue;
if (phase1 < 0.5) phase1 = 0.5;
definitionRange += phase2 - phase1;
sum2 += (phase2 - phase1) * rightValue;
}
}
}
} else { // no interpolation
double rimin = Sampled_xToIndex (me, xmin), rimax = Sampled_xToIndex (me, xmax);
if (rimax >= 0.5 && rimin < my nx + 0.5) {
imin = rimin < 0.5 ? 0 : (long) floor (rimin + 0.5);
imax = rimax >= my nx + 0.5 ? my nx + 1 : (long) floor (rimax + 0.5);
for (isamp = imin + 1; isamp < imax; isamp ++) {
double value = my v_getValueAtSample (isamp, ilevel, unit);
if (NUMdefined (value)) {
value -= mean;
value *= value;
definitionRange += 1.0;
sum2 += value;
}
}
if (imin == imax) {
double value = my v_getValueAtSample (imin, ilevel, unit);
if (NUMdefined (value)) {
double phase = rimax - rimin;
value -= mean;
value *= value;
definitionRange += phase;
sum2 += phase * value;
}
} else {
if (imin >= 1) {
double value = my v_getValueAtSample (imin, ilevel, unit);
if (NUMdefined (value)) {
double phase = imin - rimin + 0.5;
value -= mean;
value *= value;
definitionRange += phase;
sum2 += phase * value;
}
}
if (imax <= my nx) {
double value = my v_getValueAtSample (imax, ilevel, unit);
if (NUMdefined (value)) {
double phase = rimax - imax + 0.5;
value -= mean;
value *= value;
definitionRange += phase;
sum2 += phase * value;
}
}
}
}
}
}
if (return_sum2) *return_sum2 = sum2;
if (return_definitionRange) *return_definitionRange = definitionRange;
}