Initial commit of mpg123-1.29.3

doc/examples/dump_seekindex.c

@@ -0,0 +1,44 @@
+/*
+	dump_seekindex: Scan a mpeg file and dump its seek index.
+
+	This is example code only sensible to be considered in the public domain.
+	Initially written by Patrick Dehne.
+*/
+
+#include <mpg123.h>
+#include <stdio.h>
+#include <inttypes.h>
+
+int main(int argc, char **argv)
+{
+	mpg123_handle *m;
+	off_t* offsets;
+	off_t step;
+	size_t fill, i;
+
+	if(argc != 2)
+	{
+		fprintf(stderr, "\nI will dump the frame index of an MPEG audio file.\n");
+		fprintf(stderr, "\nUsage: %s <mpeg audio file>\n\n", argv[0]);
+		return -1;
+	}
+#if MPG123_API_VERSION < 46
+	// Newer versions of the library don't need that anymore, but it is safe
+	// to have the no-op call present for compatibility with old versions.
+	 mpg123_init();
+#endif
+	m = mpg123_new(NULL, NULL);
+	mpg123_param(m, MPG123_RESYNC_LIMIT, -1, 0);
+	mpg123_param(m, MPG123_INDEX_SIZE, -1, 0);
+	mpg123_open(m, argv[1]);
+	mpg123_scan(m);
+
+	mpg123_index(m, &offsets, &step, &fill);
+	for(i=0; i<fill;i++) {
+		printf("Frame number %"PRIiMAX": file offset %"PRIiMAX"\n", (intmax_t)(i * step), (intmax_t)offsets[i]);
+	}
+
+	mpg123_close(m);
+	mpg123_delete(m);
+	return 0;
+}