49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
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/*
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scan: Estimate length (sample count) of a mpeg file and compare to length from exact scan.
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This is example code only sensible to be considered in the public domain.
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Initially written by Thomas Orgis
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*/
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/* Note the lack of error checking here.
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While it would be nicer to inform the user about troubles, libmpg123 is designed _not_ to bite you on operations with invalid handles , etc.
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You just jet invalid results on invalid operations... */
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#include <mpg123.h>
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#include <stdio.h>
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/** The whole operation. */
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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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int i;
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if(argc < 2)
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{
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fprintf(stderr, "\nI will give you the estimated and exact sample lengths of MPEG audio files.\n");
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fprintf(stderr, "\nUsage: %s <mpeg audio file list>\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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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); /* New in library version 0.0.1 . */
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for(i = 1; i < argc; ++i)
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{
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off_t a, b;
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mpg123_open(m, argv[i]);
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a = mpg123_length(m);
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mpg123_scan(m);
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b = mpg123_length(m);
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mpg123_close(m);
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printf("File %i: estimated %li vs. scanned %li\n", i, (long)a, (long)b);
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}
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mpg123_delete(m);
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return 0;
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}
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