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