}
- //the following is different from version 1 because interpolate between db and not linear. Conversion from db to lin must be done after.
- //it is also different for the way it interpolates between DC and 31 Hz
- // Pay attention that also arguments to the functions are changed
- int equalinterval2(double const freqsamples[], double const freqresp_db[], std::vector<double>& eqfreqsamples, std::vector<double>& eqfreqresp, int points, int samplingfreq, int origpoints, int bitdepthsoundfile) {
- double freq;
-
-
- //calculate miminum attenuation depending on the bitdeph (minus one), that is −6.020599913 dB per bit in eccess to sign
- double dcatt = ((double) (bitdepthsoundfile - 1))*(-6.020599913) + 20.00; //in dB
- //double dcatt = -90.3;
- double pass = ((double) (samplingfreq >> 1)) / ((double) points);
- for (int ieq = 0, i = 0; ieq < points; ieq++) {
- freq = ieq*pass;
- eqfreqsamples[ieq] = freq;
-
- if (freq == 0.0) {
- eqfreqresp[ieq] = dcatt;
- } else if (freq < freqsamples[0]) { // this has a lot of influence on final Leq(M) value
- eqfreqresp[ieq] = ((freqresp_db[0] - dcatt) / (freqsamples[0] - 0)) * freq + dcatt;
- //eqfreqresp[ieq] = freqresp_db[0]; // Is this meaningful? Shouldn't I interpolate between 0 Hz and 31 Hz? Otherwise for DC I have -35.5 dB
- continue;
- } else {
-
- if ((freq >= freqsamples[i]) && (freq < freqsamples[i+1])) {
- eqfreqresp[ieq] = ((freqresp_db[i+1] - freqresp_db[i])/(freqsamples[i+1] - freqsamples[i]))*(freq - freqsamples[i]) + freqresp_db[i];
- } else if (freq >=freqsamples[i+1]) {
- while(freq >= freqsamples[i+1]) {
- i++;
- if ((i + 1) >= origpoints) {
- break;
- }
- }
- if ((i+1) < origpoints) {
- eqfreqresp[ieq] = ((freqresp_db[i+1] - freqresp_db[i])/(freqsamples[i+1] - freqsamples[i]))*(freq- freqsamples[i]) + freqresp_db[i];
- } else {
- eqfreqresp[ieq] = ((1 - freqresp_db[i])/(((double) (samplingfreq >> 1)) - freqsamples[i]))*(freq- freqsamples[i]) + freqresp_db[i];
+//the following is different from version 1 because interpolate between db and not linear. Conversion from db to lin must be done after.
+//it is also different for the way it interpolates between DC and 31 Hz
+// Pay attention that also arguments to the functions are changed
+int equalinterval2(double const freqsamples[], double const freqresp_db[], std::vector<double>& eqfreqsamples, std::vector<double>& eqfreqresp, int points, int samplingfreq, int origpoints, int bitdepthsoundfile) {
+ double freq;
+
+
+ //calculate miminum attenuation depending on the bitdeph (minus one), that is −6.020599913 dB per bit in eccess to sign
+ double dcatt = ((double) (bitdepthsoundfile - 1))*(-6.020599913) + 20.00; //in dB
+ //double dcatt = -90.3;
+ double pass = ((double) (samplingfreq >> 1)) / ((double) points);
+ for (int ieq = 0, i = 0; ieq < points; ieq++) {
+ freq = ieq*pass;
+ eqfreqsamples[ieq] = freq;
+
+ if (freq == 0.0) {
+ eqfreqresp[ieq] = dcatt;
+ } else if (freq < freqsamples[0]) { // this has a lot of influence on final Leq(M) value
+ eqfreqresp[ieq] = ((freqresp_db[0] - dcatt) / (freqsamples[0] - 0)) * freq + dcatt;
+ //eqfreqresp[ieq] = freqresp_db[0]; // Is this meaningful? Shouldn't I interpolate between 0 Hz and 31 Hz? Otherwise for DC I have -35.5 dB
+ continue;
+ } else {
+
+ if ((freq >= freqsamples[i]) && (freq < freqsamples[i+1])) {
+ eqfreqresp[ieq] = ((freqresp_db[i+1] - freqresp_db[i])/(freqsamples[i+1] - freqsamples[i]))*(freq - freqsamples[i]) + freqresp_db[i];
+ } else if (freq >=freqsamples[i+1]) {
+ while(freq >= freqsamples[i+1]) {
+ i++;
+ if ((i + 1) >= origpoints) {
+ break;
}
}
+ if ((i+1) < origpoints) {
+ eqfreqresp[ieq] = ((freqresp_db[i+1] - freqresp_db[i])/(freqsamples[i+1] - freqsamples[i]))*(freq- freqsamples[i]) + freqresp_db[i];
+ } else {
+ eqfreqresp[ieq] = ((1 - freqresp_db[i])/(((double) (samplingfreq >> 1)) - freqsamples[i]))*(freq- freqsamples[i]) + freqresp_db[i];
+ }
}
}
- return 0;
}
+ return 0;
+}
-
-
-
-
- int convloglin(std::vector<double> const& in, std::vector<double>& out, int points) {
- for (int i = 0; i < points; i++) {
- out[i] = powf(10, (in[i]/20.0));
- }
-
- return 0;
+int convloglin(std::vector<double> const& in, std::vector<double>& out, int points) {
+ for (int i = 0; i < points; i++) {
+ out[i] = powf(10, (in[i]/20.0));
}
+ return 0;
+}
- double convlinlog_single(double in) {
- return log(in) * 20.0f;
- }
+double convlinlog_single(double in) {
+ return log(in) * 20.0f;
+}
- double convloglin_single(double in) {
- return powf(10, in / 20.0f);
- }
- // convolution
+double convloglin_single(double in) {
+ return powf(10, in / 20.0f);
+}
+// convolution
- void inversefft2(std::vector<double> const& eqfreqresp, std::vector<double>& ir, int npoints) {
- for (int n = 0; n < npoints; n++) {
- double parsum = 0.0;
- double partial = 0.0;
- for (int m = 1; m <= npoints -1; m++) {
- partial = cos(2.0*M_PI*((double) m)*( ( ((double) n) - ( ((double) npoints) * 2.0 -1 ) / 2 ) / ( ((double) npoints) * 2.0) ));
- parsum = parsum + eqfreqresp[m]*partial;
- }
- ir[n] = (eqfreqresp[0] + 2.0 * parsum)/((double) npoints * 2.0);
+void inversefft2(std::vector<double> const& eqfreqresp, std::vector<double>& ir, int npoints) {
+ for (int n = 0; n < npoints; n++) {
+ double parsum = 0.0;
+ double partial = 0.0;
+
+ for (int m = 1; m <= npoints -1; m++) {
+ partial = cos(2.0*M_PI*((double) m)*( ( ((double) n) - ( ((double) npoints) * 2.0 -1 ) / 2 ) / ( ((double) npoints) * 2.0) ));
+ parsum = parsum + eqfreqresp[m]*partial;
+ }
+ ir[n] = (eqfreqresp[0] + 2.0 * parsum)/((double) npoints * 2.0);
#ifdef DEBUG
- printf("%.4f\n", ir[n]);
+ printf("%.4f\n", ir[n]);
#endif
- }
- for (int n = 0; n < npoints; n++) {
- ir[npoints+n] = ir[npoints-(n + 1)];
+ }
+ for (int n = 0; n < npoints; n++) {
+ ir[npoints+n] = ir[npoints-(n + 1)];
#ifdef DEBUG
- printf("%.4f\n", ir[npoints+n]);
+ printf("%.4f\n", ir[npoints+n]);
#endif
- }
+ }
- }
+}
- // scale input according to required calibration
- // this could be different for certain digital cinema formats
- double inputcalib(double dbdiffch)
- {
- return pow(10, dbdiffch / 20);
- }
+// scale input according to required calibration
+// this could be different for certain digital cinema formats
+double inputcalib(double dbdiffch)
+{
+ return pow(10, dbdiffch / 20);
+}
- void logleqm(FILE * filehandle, double featuretimesec, Sum const& oldsum) {
+void logleqm(FILE * filehandle, double featuretimesec, Sum const& oldsum) {
- fprintf(filehandle, "%.4f", featuretimesec);
- fprintf(filehandle, "\t");
- fprintf(filehandle, "%.4f\n", oldsum.leqm());
+ fprintf(filehandle, "%.4f", featuretimesec);
+ fprintf(filehandle, "\t");
+ fprintf(filehandle, "%.4f\n", oldsum.leqm());
- }
+}
- void logleqm10(FILE * filehandle, double featuretimesec, double longaverage) {
- double leqm10 = 20*log10(pow(longaverage, 0.500)) + 108.010299957;
- fprintf(filehandle, "%.4f", featuretimesec);
- fprintf(filehandle, "\t");
- fprintf(filehandle, "%.4f\n", leqm10);
+void logleqm10(FILE * filehandle, double featuretimesec, double longaverage) {
+ double leqm10 = 20*log10(pow(longaverage, 0.500)) + 108.010299957;
+ fprintf(filehandle, "%.4f", featuretimesec);
+ fprintf(filehandle, "\t");
+ fprintf(filehandle, "%.4f\n", leqm10);
- }
+}
projects / leqm-nrt.git / commitdiff