1 /* 2 * Copyright (C) 2000 Rich Wareham <richwareham@users.sourceforge.net> 3 * 4 * This file is part of libdvdnav, a DVD navigation library. 5 * 6 * libdvdnav is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * libdvdnav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 19 */ 20 21 #ifndef __DVDNAV_READ_CACHE_H 22 #define __DVDNAV_READ_CACHE_H 23 24 #include "dvdnav_internal.h" 25 26 /* Opaque cache type -- defined in dvdnav_internal.h */ 27 /* typedef struct read_cache_s read_cache_t; */ 28 29 /* EXPERIMENTAL: Setting the following to 1 will use an experimental multi-threaded 30 * read-ahead cache. 31 */ 32 #define _MULTITHREAD_ 0 33 34 /* Constructor/destructors */ 35 read_cache_t *dvdnav_read_cache_new(dvdnav_t* dvd_self); 36 void dvdnav_read_cache_free(read_cache_t* self); 37 38 /* This function MUST be called whenever self->file changes. */ 39 void dvdnav_read_cache_clear(read_cache_t *self); 40 /* This function is called just after reading the NAV packet. */ 41 void dvdnav_pre_cache_blocks(read_cache_t *self, int sector, size_t block_count); 42 /* This function will do the cache read. 43 * The buffer handed in must be malloced to take one dvd block. 44 * On a cache hit, a different buffer will be returned though. 45 * Those buffers must _never_ be freed. */ 46 int dvdnav_read_cache_block(read_cache_t *self, int sector, size_t block_count, uint8_t **buf); 47 48 #endif /* __DVDNAV_READ_CACHE_H */ 49