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/*
tsrc.c
David Rowe
Sat Nov 3 2012
Unit test for libresample code.
build: gcc tsrc.c -o tsrc -lm -lsamplerate
*/
#include <assert.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <samplerate.h>
#include <unistd.h>
#define N 10000 /* processing buffer size */
void display_help(void) {
fprintf(stderr, "\nusage: tsrc inputRawFile OutputRawFile OutSampleRatio [-l] [-c]\n");
fprintf(stderr, "\nUse - for stdin/stdout\n\n");
fprintf(stderr, "-l fast linear resampler\n");
fprintf(stderr, "-c complex (two channel) resampling\n\n");
}
int main(int argc, char *argv[]) {
FILE *fin, *fout;
short in_short[N], out_short[N];
float in[N], out[N];
SRC_STATE *src;
SRC_DATA data;
int error, nin, nremaining, i;
if (argc < 3) {
display_help();
exit(1);
}
if (strcmp(argv[1], "-") == 0)
fin = stdin;
else
fin = fopen(argv[1], "rb");
assert(fin != NULL);
if (strcmp(argv[2], "-") == 0)
fout = stdout;
else
fout = fopen(argv[2], "wb");
assert(fout != NULL);
data.data_in = in;
data.data_out = out;
data.end_of_input = 0;
data.src_ratio = atof(argv[3]);
int channels = 1;
int resampler = SRC_SINC_FASTEST;
int opt;
while ((opt = getopt(argc, argv, "lc")) != -1) {
switch (opt) {
case 'l': resampler = SRC_LINEAR; break;
case 'c': channels = 2; break;
default:
display_help();
exit(1);
}
}
data.input_frames = N/channels;
data.output_frames = N/channels;
src = src_new(resampler, channels, &error);
assert(src != NULL);
int total_in = 0;
int total_out = 0;
nin = data.input_frames;
nremaining = 0;
while(fread(&in_short[nremaining*channels], sizeof(short)*channels, nin, fin) == nin) {
src_short_to_float_array(in_short, in, N);
error = src_process(src, &data);
assert(error == 0);
src_float_to_short_array(out, out_short, data.output_frames_gen*channels);
fwrite(out_short, sizeof(short), data.output_frames_gen*channels, fout);
if (fout == stdout) fflush(stdout);
nremaining = data.input_frames - data.input_frames_used;
nin = data.input_frames_used;
//fprintf(stderr, "input frames: %d output_frames %d nremaining: %d\n",
// (int)data.input_frames_used, (int)data.output_frames_gen, nremaining);
for(i=0; i<nremaining*channels; i++)
in_short[i] = in_short[i+nin*channels];
total_in += data.input_frames_used;
total_out += data.output_frames_gen;
}
//fprintf(stderr, "total_in: %d total_out: %d\n", total_in, total_out);
fclose(fout);
fclose(fin);
return 0;
}
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