ae5438b49c7fe9021d16c8e664a1cb0cc685d374
[libav.git] / libavcodec / bytestream.h
1 /*
2 * Bytestream functions
3 * copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef FFMPEG_BYTESTREAM_H
23 #define FFMPEG_BYTESTREAM_H
24
25 static av_always_inline unsigned int bytestream_get_le32(uint8_t **b)
26 {
27 (*b) += 4;
28 return AV_RL32(*b - 4);
29 }
30
31 static av_always_inline unsigned int bytestream_get_le16(uint8_t **b)
32 {
33 (*b) += 2;
34 return AV_RL16(*b - 2);
35 }
36
37 static av_always_inline unsigned int bytestream_get_byte(uint8_t **b)
38 {
39 (*b)++;
40 return (*b)[-1];
41 }
42
43 static av_always_inline unsigned int bytestream_get_buffer(uint8_t **b, uint8_t *dst, unsigned int size)
44 {
45 memcpy(dst, *b, size);
46 (*b) += size;
47 return size;
48 }
49
50 static av_always_inline void bytestream_put_be32(uint8_t **b, const unsigned int value)
51 {
52 *(*b)++ = value >> 24;
53 *(*b)++ = value >> 16;
54 *(*b)++ = value >> 8;
55 *(*b)++ = value;
56 };
57
58 static av_always_inline void bytestream_put_be16(uint8_t **b, const unsigned int value)
59 {
60 *(*b)++ = value >> 8;
61 *(*b)++ = value;
62 }
63
64 static av_always_inline void bytestream_put_le32(uint8_t **b, const unsigned int value)
65 {
66 *(*b)++ = value;
67 *(*b)++ = value >> 8;
68 *(*b)++ = value >> 16;
69 *(*b)++ = value >> 24;
70 }
71
72 static av_always_inline void bytestream_put_le16(uint8_t **b, const unsigned int value)
73 {
74 *(*b)++ = value;
75 *(*b)++ = value >> 8;
76 }
77
78 static av_always_inline void bytestream_put_byte(uint8_t **b, const unsigned int value)
79 {
80 *(*b)++ = value;
81 }
82
83 static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
84 {
85 memcpy(*b, src, size);
86 (*b) += size;
87 }
88
89 #endif /* FFMPEG_BYTESTREAM_H */