103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/*
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* Buffered I/O for ffmpeg system
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* Copyright (c) 2000,2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* LOOPBUF READ
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* Write By [email protected]
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*
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*/
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#include "libavutil/crc.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "avio.h"
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#include <stdarg.h>
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#include "aviolpcache.h"
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static struct cache_client *default_cache_client = NULL;
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int aviolp_register_cache_system(struct cache_client *cache)
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{
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if (default_cache_client == NULL) { /*only alow first register*/
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default_cache_client = cache;
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} else {
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return -1;
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}
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return 0;
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}
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static inline struct cache_client *get_default_cache_client(void) {
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return default_cache_client;
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}
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int aviolp_cache_read(int id, int64_t offset, char *buf, int size)
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{
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struct cache_client *client = get_default_cache_client();
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if (client && client->cache_read) {
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return client->cache_read(id, offset, buf, size);
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} else {
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return -1;
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}
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}
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int aviolp_cache_write(int id, int64_t offset, char *buf, int size)
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{
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struct cache_client *client = get_default_cache_client();
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if (client && client->cache_write) {
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return client->cache_write(id, offset, buf, size);
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} else {
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return -1;
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}
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}
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unsigned long aviolp_cache_open(const char * url, int64_t file_size)
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{
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struct cache_client *client = get_default_cache_client();
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if (client && client->cache_open) {
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return client->cache_open(url, file_size);
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} else {
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return 0;
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}
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}
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int aviolp_cache_next_valid_bytes(int id, int64_t offset, int maxsize)
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{
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struct cache_client *client = get_default_cache_client();
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if (client && client->cache_next_valid_bytes) {
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return client->cache_next_valid_bytes(id, offset, maxsize);
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} else {
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return 0;
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}
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}
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int aviolp_cache_close(int cache_id)
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{
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struct cache_client *client = get_default_cache_client();
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if (client && client->cache_close) {
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return client->cache_close(cache_id);
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} else {
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return -1;
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}
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}
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