45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
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/*
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dump_seekindex: Scan a mpeg file and dump its seek index.
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This is example code only sensible to be considered in the public domain.
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Initially written by Patrick Dehne.
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*/
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#include <mpg123.h>
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#include <stdio.h>
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#include <inttypes.h>
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int main(int argc, char **argv)
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{
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mpg123_handle *m;
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off_t* offsets;
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off_t step;
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size_t fill, i;
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if(argc != 2)
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{
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fprintf(stderr, "\nI will dump the frame index of an MPEG audio file.\n");
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fprintf(stderr, "\nUsage: %s <mpeg audio file>\n\n", argv[0]);
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return -1;
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}
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#if MPG123_API_VERSION < 46
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// Newer versions of the library don't need that anymore, but it is safe
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// to have the no-op call present for compatibility with old versions.
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mpg123_init();
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#endif
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m = mpg123_new(NULL, NULL);
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mpg123_param(m, MPG123_RESYNC_LIMIT, -1, 0);
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mpg123_param(m, MPG123_INDEX_SIZE, -1, 0);
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mpg123_open(m, argv[1]);
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mpg123_scan(m);
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mpg123_index(m, &offsets, &step, &fill);
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for(i=0; i<fill;i++) {
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printf("Frame number %"PRIiMAX": file offset %"PRIiMAX"\n", (intmax_t)(i * step), (intmax_t)offsets[i]);
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}
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mpg123_close(m);
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mpg123_delete(m);
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return 0;
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}
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