read_cache.h 1.87 KB
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/*
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 * Copyright (C) 2000 Rich Wareham <richwareham@users.sourceforge.net>
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 *
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 * This file is part of libdvdnav, a DVD navigation library.
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 *
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 * libdvdnav is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
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 *
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 * libdvdnav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
 * with libdvdnav; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

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#ifndef LIBDVDNAV_READ_CACHE_H
#define LIBDVDNAV_READ_CACHE_H
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/* Opaque cache type -- defined in dvdnav_internal.h */
/* typedef struct read_cache_s read_cache_t; */

/* EXPERIMENTAL: Setting the following to 1 will use an experimental multi-threaded
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 *               read-ahead cache.
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 */
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#define _MULTITHREAD_ 0
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/* Constructor/destructors */
read_cache_t *dvdnav_read_cache_new(dvdnav_t* dvd_self);
void dvdnav_read_cache_free(read_cache_t* self);

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/* This function MUST be called whenever self->file changes. */
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void dvdnav_read_cache_clear(read_cache_t *self);
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/* This function is called just after reading the NAV packet. */
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void dvdnav_pre_cache_blocks(read_cache_t *self, int sector, size_t block_count);
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/* This function will do the cache read.
 * The buffer handed in must be malloced to take one dvd block.
 * On a cache hit, a different buffer will be returned though.
 * Those buffers must _never_ be freed. */
int dvdnav_read_cache_block(read_cache_t *self, int sector, size_t block_count, uint8_t **buf);
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#endif /* LIBDVDNAV_READ_CACHE_H */