/* ----------- 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;
}
void mpeg_rd(Data_Obj *dp,Image_File *ifp,index_t x_offset, index_t y_offset,index_t t_offset)
{
static char *data_ptr;
char *pixels;
int i;
#ifdef BPP_3
int actual_fr_size;
#endif /* BPP_3 */
#ifdef QUIP_DEBUG
printf("mpeg_rd: IN\n");
#endif /* QUIP_DEBUG */
/* make sure that the sizes match */
if( ! dp_same_dim(dp,ifp->if_dp,0) ) return; /* same # components? */
if( ! dp_same_dim(dp,ifp->if_dp,1) ) return; /* same # columns? */
if( ! dp_same_dim(dp,ifp->if_dp,2) ) return; /* same # rows? */
#ifdef FOOBAR
#ifdef BPP_3
/* we don't need to alloate mem for the unused byte, hence 0.75 */
actual_fr_size = ifp->hdr->idp->Size * 0.75 * sizeof(char);
data_ptr = dp->dt_data = (char *)malloc(actual_fr_size);
#else
data_ptr = dp->dt_data = (char *)malloc(ifp->hdr->idp->Size);
#endif /* BPP_3 */
#endif /* FOOBAR */
/* Saad must have written that code resetting dp->dt_data!? */
/* note that it was never free'd */
data_ptr = (char *)dp->dt_data;
/* mem for decoded image */
pixels = (char *)malloc(ifp->hdr->idp->Size * sizeof(char));
/* Get a single MPEG frame */
GetMPEGFrame(pixels);
/* Copy frame to the data object */
for(i=0; i<ifp->hdr->idp->Size; i+=4) {
/* For full colour dithering, there are four bytes per pixel:
* red, green, blue, and unused.
*/
*(data_ptr) = *(pixels+i+2);
*(data_ptr+1) = *(pixels+i+1);
*(data_ptr+2) = *(pixels+i+0);
#ifdef BPP_3
data_ptr+=3;
#else
data_ptr+=4;
#endif /* BPP_3 */
}
#ifdef QUIP_DEBUG_USING_SDL
#ifdef BPP_3
screen->pixels = (char *)memcpy(screen->pixels, dp->dt_data, actual_fr_size);
#else
screen->pixels = (char *)memcpy(screen->pixels, dp->dt_data, ifp->hdr->idp->Size);
#endif /* BPP_3 */
SDL_UpdateRect(screen, 0, 0, 0, 0);
#endif /* QUIP_DEBUG_USING_SDL */
// dp->dt_data = (char *)memcpy(dp->dt_data, pixels, ifp->hdr->idp->Size);
free(pixels);
ifp->if_nfrms ++;
if( FILE_FINISHED(ifp) ){ /* BUG? if autoclose is set to no, do we make sure we don't read past eof? */
if( verbose ){
sprintf(error_string,
"closing file \"%s\" after reading %ld frames",
ifp->if_name,ifp->if_nfrms);
advise(error_string);
}
mpeg_close(ifp);
}
#ifdef QUIP_DEBUG
printf("mpeg_rd: OUT\n");
#endif /* QUIP_DEBUG */
}
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;
}
