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#include "bqresample/Resampler.h"
#include <sndfile.h>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <cmath>
using namespace std;
void usage()
{
cerr << "Usage: resample [-v] [-c <converter>] -to <rate> <infile> <outfile>" << endl;
cerr << "where <converter> may be 0, 1, or 2, for best, medium, or fastest respectively." << endl;
cerr << "The default converter is 0, best." << endl;
cerr << "Supply -v for verbose output." << endl;
exit(2);
}
int main(int argc, char **argv)
{
double target = 0.0;
int quality = 0;
int arg;
bool verbose = false;
for (arg = 1; arg + 2 < argc; ++arg) {
if (!strcmp(argv[arg], "-c")) {
char *e = argv[arg+1];
quality = strtol(argv[arg+1], &e, 10);
if (*e || (quality < 0) || (quality > 2)) {
cerr << "error: invalid converter \""
<< argv[arg+1] << "\" (must be 0, 1, 2)" << endl;
usage();
}
++arg;
continue;
} else if (!strcmp(argv[arg], "-to")) {
target = strtod(argv[arg+1], 0);
if (!target) {
cerr << "error: invalid target \"" << argv[arg+1]
<< "\" (must be numeric)" << endl;
usage();
}
++arg;
continue;
} else if (!strcmp(argv[arg], "-v")) {
verbose = true;
} else {
cerr << "error: unexpected option \"" << argv[arg] << "\"" << endl;
usage();
}
}
if (!target || arg + 2 != argc) {
usage();
}
string infilename = argv[arg];
string outfilename = argv[arg+1];
SF_INFO info_in;
SNDFILE *file_in = sf_open(infilename.c_str(), SFM_READ, &info_in);
if (!file_in) {
cerr << "failed to open " << infilename << endl;
return 1;
}
int output_rate = round(target);
int channels = info_in.channels;
if (verbose) {
cerr << "input rate = " << info_in.samplerate << endl;
cerr << "output rate = " << output_rate << endl;
}
double ratio = target / info_in.samplerate;
if (verbose) {
cerr << "ratio = " << ratio << endl;
}
breakfastquay::Resampler::Parameters parameters;
switch (quality) {
case 0:
parameters.quality = breakfastquay::Resampler::Best;
if (verbose) {
cerr << "quality = best" << endl;
}
break;
case 1:
parameters.quality = breakfastquay::Resampler::FastestTolerable;
if (verbose) {
cerr << "quality = middling" << endl;
}
break;
case 2:
parameters.quality = breakfastquay::Resampler::Fastest;
if (verbose) {
cerr << "quality = worst" << endl;
}
break;
}
SF_INFO info_out;
memset(&info_out, 0, sizeof(SF_INFO));
info_out.channels = channels;
info_out.format = info_in.format;
info_out.samplerate = output_rate;
SNDFILE *file_out = sf_open(outfilename.c_str(), SFM_WRITE, &info_out);
if (!file_out) {
cerr << "failed to open " << outfilename << endl;
return 1;
}
int ibs = 1024;
int obs = ceil(ibs * ratio);
float *ibuf = new float[ibs * channels];
float *obuf = new float[obs * channels];
parameters.dynamism = breakfastquay::Resampler::RatioMostlyFixed;
parameters.ratioChange = breakfastquay::Resampler::SuddenRatioChange;
parameters.initialSampleRate = info_in.samplerate;
parameters.debugLevel = (verbose ? 1 : 0);
breakfastquay::Resampler resampler(parameters, info_in.channels);
int n = 0;
while (true) {
int count = sf_readf_float(file_in, ibuf, ibs);
if (verbose) {
cerr << ".";
}
if (count < 0) {
cerr << "error: count = " << count << endl;
break;
}
bool final = (count < ibs);
int got = resampler.resampleInterleaved
(obuf, obs, ibuf, count, ratio, final);
if (got == 0 && final) {
break;
} else {
for (int i = 0; i < got * channels; ++i) {
if (obuf[i] < -1.0) obuf[i] = -1.0;
if (obuf[i] > 1.0) obuf[i] = 1.0;
}
sf_writef_float(file_out, obuf, got);
}
++n;
}
if (verbose) {
cerr << endl;
}
sf_close(file_in);
sf_close(file_out);
delete[] ibuf;
delete[] obuf;
}
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