libavformat/avio_internal.h
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00001 /*
00002  *
00003  * This file is part of Libav.
00004  *
00005  * Libav is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Lesser General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2.1 of the License, or (at your option) any later version.
00009  *
00010  * Libav is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Lesser General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Lesser General Public
00016  * License along with Libav; if not, write to the Free Software
00017  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00018  */
00019 
00020 #ifndef AVFORMAT_AVIO_INTERNAL_H
00021 #define AVFORMAT_AVIO_INTERNAL_H
00022 
00023 #include "avio.h"
00024 #include "url.h"
00025 
00026 #include "libavutil/log.h"
00027 
00028 extern const AVClass ffio_url_class;
00029 
00030 int ffio_init_context(AVIOContext *s,
00031                   unsigned char *buffer,
00032                   int buffer_size,
00033                   int write_flag,
00034                   void *opaque,
00035                   int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
00036                   int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
00037                   int64_t (*seek)(void *opaque, int64_t offset, int whence));
00038 
00039 
00046 int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size);
00047 
00048 void ffio_fill(AVIOContext *s, int b, int count);
00049 
00050 static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
00051 {
00052     avio_wl32(pb, MKTAG(s[0], s[1], s[2], s[3]));
00053 }
00054 
00067 int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
00068 
00069 uint64_t ffio_read_varlen(AVIOContext *bc);
00070 
00072 int ffio_set_buf_size(AVIOContext *s, int buf_size);
00073 
00074 void ffio_init_checksum(AVIOContext *s,
00075                         unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
00076                         unsigned long checksum);
00077 unsigned long ffio_get_checksum(AVIOContext *s);
00078 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
00079                                     unsigned int len);
00080 
00090 int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
00091 
00103 int ffio_fdopen(AVIOContext **s, URLContext *h);
00104 
00105 #endif /* AVFORMAT_AVIO_INTERNAL_H */