avio_internal.h
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1 /*
2  *
3  * This file is part of Libav.
4  *
5  * Libav is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * Libav is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with Libav; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #ifndef AVFORMAT_AVIO_INTERNAL_H
21 #define AVFORMAT_AVIO_INTERNAL_H
22 
23 #include "avio.h"
24 #include "url.h"
25 
26 #include "libavutil/log.h"
27 
28 extern const AVClass ffio_url_class;
29 
31  unsigned char *buffer,
32  int buffer_size,
33  int write_flag,
34  void *opaque,
35  int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
36  int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
37  int64_t (*seek)(void *opaque, int64_t offset, int whence));
38 
39 
46 int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size);
47 
48 void ffio_fill(AVIOContext *s, int b, int count);
49 
50 static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
51 {
52  avio_wl32(pb, MKTAG(s[0], s[1], s[2], s[3]));
53 }
54 
67 int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
68 
69 uint64_t ffio_read_varlen(AVIOContext *bc);
70 
72 int ffio_set_buf_size(AVIOContext *s, int buf_size);
73 
75  unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
76  unsigned long checksum);
77 unsigned long ffio_get_checksum(AVIOContext *s);
78 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
79  unsigned int len);
80 
90 int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
91 
103 int ffio_fdopen(AVIOContext **s, URLContext *h);
104 
105 #endif /* AVFORMAT_AVIO_INTERNAL_H */