Directly #include some required headers.
[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 AVCODEC_BYTESTREAM_H
23 #define AVCODEC_BYTESTREAM_H
24
25 #include <string.h>
26 #include "libavutil/common.h"
27 #include "libavutil/intreadwrite.h"
28
29 #define DEF_T(type, name, bytes, read, write) \
30 static av_always_inline type bytestream_get_ ## name(const uint8_t **b){\
31 (*b) += bytes;\
32 return read(*b - bytes);\
33 }\
34 static av_always_inline void bytestream_put_ ##name(uint8_t **b, const type value){\
35 write(*b, value);\
36 (*b) += bytes;\
37 }
38
39 #define DEF(name, bytes, read, write) \
40 DEF_T(unsigned int, name, bytes, read, write)
41 #define DEF64(name, bytes, read, write) \
42 DEF_T(uint64_t, name, bytes, read, write)
43
44 DEF64(le64, 8, AV_RL64, AV_WL64)
45 DEF (le32, 4, AV_RL32, AV_WL32)
46 DEF (le24, 3, AV_RL24, AV_WL24)
47 DEF (le16, 2, AV_RL16, AV_WL16)
48 DEF64(be64, 8, AV_RB64, AV_WB64)
49 DEF (be32, 4, AV_RB32, AV_WB32)
50 DEF (be24, 3, AV_RB24, AV_WB24)
51 DEF (be16, 2, AV_RB16, AV_WB16)
52 DEF (byte, 1, AV_RB8 , AV_WB8 )
53
54 #undef DEF
55 #undef DEF64
56 #undef DEF_T
57
58 static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
59 {
60 memcpy(dst, *b, size);
61 (*b) += size;
62 return size;
63 }
64
65 static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
66 {
67 memcpy(*b, src, size);
68 (*b) += size;
69 }
70
71 #endif /* AVCODEC_BYTESTREAM_H */