/* ----------- Global Functions ---------------------------------- */
int mpeg_isvalid(char *path)
{
int rv = 0;
int fd = 0;
struct mpg123_frameinfo finfo;
fd = mpeg_open(path);
if(fd != -1)
{
if(handle && (mpg123_info(handle->mh, &finfo) == MPG123_OK))
{
rv = 1;
}
mpeg_close(fd);
}
return rv;
}
int
main(int argc, char *argv[]) {
/*
* step 1: declare the basic data structure used by MPEGlib
*/
int num = 0, i = 0;
mpeg_t *MPEG = NULL;
mpeg_file_t *MFILE = NULL;
const mpeg_stream_t *mps = NULL;
if(argc != 2) {
fprintf(stderr, "mpegprobe prints some informations about a given"
"mpeg file using MPEGlib detection routines\n");
fprintf(stderr, "usage: %s mpegfile\n", PROGNAME);
exit(EXIT_SUCCESS);
}
/*
* step 2: open data source.
* mpeg_file_open is the default FILE wrapper used by MPEGlib and will
* be always avalaible. It acts just like a plain old fopen() and support
* only local files
*/
MFILE = mpeg_file_open(argv[1], "r");
if(!MFILE) {
fprintf(stderr, "unable to open: %s\n", argv[1]);
exit(1);
}
/*
* step 3: create a new MPEG descriptor. We need basically a pointer
* to a FILE wrapper (mpeg_file_t) and a flag which indicates the kind
* of MPEG file to be open.
*/
MPEG = mpeg_open(MPEG_TYPE_ANY, MFILE, MPEG_DEFAULT_FLAGS, NULL);
if(!MPEG) {
mpeg_file_close(MFILE);
fprintf(stderr, "mpeg_open() failed\n");
exit(1);
}
/*
* step 4a: now we print what we have found. How many streams we have?
*/
num = mpeg_get_stream_number(MPEG);
printf("(%s) found %i A/V streams\n", __FILE__, num);
for(i = 0; i < num; i++) {
/*
* step 4b: get a descriptor for stream #i. This is obviously a constant
* reference. We do not free() them.
*/
mps = mpeg_get_stream_info(MPEG, i);
if(mps != NULL) {
printf("(%s) stream #%02i:\n", __FILE__, i);
/*
* step 4c: MPEGlib provides a support function to print main
* stream informations on a standard FILE. a value of '0' for
* a fields means 'not detected'
*/
mpeg_print_stream_info(mps, stdout);
} else {
printf("(%s) WARNING: can't get stream information for stream #%02i\n",
__FILE__, i);
}
}
/*
* step 5: finalize the MPEG descriptor. Weird things can happen if we do not
* follow the REVERSE order of finalization strictly.
*/
mpeg_close(MPEG);
/*
* step 5: closing the FILE wrapper
*/
mpeg_file_close(MFILE);
/**
* all done! :)
*/
return 0;
}
