Exemplo n.º 1
0
/**
 * \brief Seek in the disc and change the current key if requested.
 *
 * \param dvdcss a \e libdvdcss instance
 * \param i_blocks an absolute block offset to seek to
 * \param i_flags #DVDCSS_NOFLAGS, optionally ORed with one of #DVDCSS_SEEK_KEY
 *        or #DVDCSS_SEEK_MPEG
 * \return the new position in blocks or a negative value in case an error
 *         happened.
 *
 * This function seeks to the requested position, in logical blocks.
 *
 * You typically set \p i_flags to #DVDCSS_NOFLAGS when seeking in a .IFO.
 *
 * If #DVDCSS_SEEK_MPEG is specified in \p i_flags and if \e libdvdcss finds it
 * reasonable to do so (i.e., if the dvdcss method is not "title"), the current
 * title key will be checked and a new one will be calculated if necessary.
 * This flag is typically used when reading data from a .VOB file.
 *
 * If #DVDCSS_SEEK_KEY is specified, the title key will always be checked,
 * even with the "title" method. This flag is typically used when seeking
 * in a new title.
 */
LIBDVDCSS_EXPORT int dvdcss_seek ( dvdcss_t dvdcss, int i_blocks, int i_flags )
{
    /* title cracking method is too slow to be used at each seek */
    if( ( ( i_flags & DVDCSS_SEEK_MPEG )
             && ( dvdcss->i_method != DVDCSS_METHOD_TITLE ) )
       || ( i_flags & DVDCSS_SEEK_KEY ) )
    {
        /* check the title key */
        if( dvdcss_title( dvdcss, i_blocks ) )
        {
            return -1;
        }
    }

    return dvdcss->pf_seek( dvdcss, i_blocks );
}
Exemplo n.º 2
0
/* Loop over all titles and call dvdcss_title to crack the keys. */
static int initAllCSSKeys( dvd_reader_t *dvd )
{
	//struct timeval all_s, all_e;
	//struct timeval t_s, t_e;
	char filename[ MAX_UDF_FILE_NAME_LEN ];
	uint32_t start, len;
	int title;
	
	char *nokeys_str = getenv("DVDREAD_NOKEYS");
	if(nokeys_str != NULL)
		return 0;
	
	//fprintf( stderr, "\n" );
	//fprintf( stderr, "libdvdread: Attempting to retrieve all CSS keys\n" );
	//fprintf( stderr, "libdvdread: This can take a _long_ time, please be patient\n\n" );
	
	//gettimeofday(&all_s, NULL);
	
	for( title = 0; title < 100; title++ ) {
		//gettimeofday( &t_s, NULL );
		if( title == 0 ) {
			sprintf( filename, "/VIDEO_TS/VIDEO_TS.VOB" );
		} else {
			sprintf( filename, "/VIDEO_TS/VTS_%02d_%d.VOB", title, 0 );
		}
		start = UDFFindFile( dvd, filename, &len );
		if( start != 0 && len != 0 ) {
			/* Perform CSS key cracking for this title. */
			//fprintf( stderr, "libdvdread: Get key for %s at 0x%08x\n", filename, start );
			if( dvdcss_title( dvd->fd, (int)start ) < 0 ) {
				//fprintf( stderr, "libdvdread: Error cracking CSS key for %s (0x%08x)\n", filename, start);
			}
			//gettimeofday( &t_e, NULL );
			//fprintf( stderr, "libdvdread: Elapsed time %ld\n",  
			//	(long int) t_e.tv_sec - t_s.tv_sec );
		}
		
		if( !title ) continue;
		
		//gettimeofday( &t_s, NULL );
		//sprintf( filename, "/VIDEO_TS/VTS_%02d_%d.VOB", title, 1 );
		start = UDFFindFile( dvd, filename, &len );
		if( start == 0 || len == 0 ) break;
		
		/* Perform CSS key cracking for this title. */
		//fprintf( stderr, "libdvdread: Get key for %s at 0x%08x\n", 
		//	filename, start );
		if( dvdcss_title( dvd->fd, (int)start ) < 0 ) {
			//fprintf( stderr, "libdvdread: Error cracking CSS key for %s (0x%08x)!!\n", filename, start);
		}
		//gettimeofday( &t_e, NULL );
		//fprintf( stderr, "libdvdread: Elapsed time %ld\n",  
		//	(long int) t_e.tv_sec - t_s.tv_sec );
	}
	title--;
	
	//fprintf( stderr, "libdvdread: Found %d VTS's\n", title );
	//gettimeofday(&all_e, NULL);
	//fprintf( stderr, "libdvdread: Elapsed time %ld\n",  
  //	(long int) all_e.tv_sec - all_s.tv_sec );
	
	return 0;
}