Initial commit of mpg123-1.29.3

doc/examples/scan.c

@@ -0,0 +1,48 @@
+/*
+	scan: Estimate length (sample count) of a mpeg file and compare to length from exact scan.
+
+	This is example code only sensible to be considered in the public domain.
+	Initially written by Thomas Orgis
+*/
+
+/* Note the lack of error checking here.
+   While it would be nicer to inform the user about troubles, libmpg123 is designed _not_ to bite you on operations with invalid handles , etc.
+  You just jet invalid results on invalid operations... */
+
+#include <mpg123.h>
+#include <stdio.h>
+
+/** The whole operation. */
+int main(int argc, char **argv)
+{
+	mpg123_handle *m;
+	int i;
+	if(argc < 2)
+	{
+		fprintf(stderr, "\nI will give you the estimated and exact sample lengths of MPEG audio files.\n");
+		fprintf(stderr, "\nUsage: %s <mpeg audio file list>\n\n", argv[0]);
+		return -1;
+	}
+#if MPG123_API_VERSION < 46
+	mpg123_init();
+#endif
+	m = mpg123_new(NULL, NULL);
+	mpg123_param(m, MPG123_RESYNC_LIMIT, -1, 0); /* New in library version 0.0.1 . */
+	for(i = 1; i < argc; ++i)
+	{
+		off_t a, b;
+		
+		mpg123_open(m, argv[i]);
+
+		a = mpg123_length(m);		
+		mpg123_scan(m);
+		b = mpg123_length(m);
+
+		mpg123_close(m);
+
+		printf("File %i: estimated %li vs. scanned %li\n", i, (long)a, (long)b);
+	}
+
+	mpg123_delete(m);
+	return 0;
+}