1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FFMPEG_INTREADWRITE_H
#define FFMPEG_INTREADWRITE_H
#include <stdint.h>
#include "bswap.h"
#ifdef __GNUC__
struct unaligned_64 { uint64_t l; } __attribute__((packed));
struct unaligned_32 { uint32_t l; } __attribute__((packed));
struct unaligned_16 { uint16_t l; } __attribute__((packed));
#define AV_RN16(a) (((const struct unaligned_16 *) (a))->l)
#define AV_RN32(a) (((const struct unaligned_32 *) (a))->l)
#define AV_RN64(a) (((const struct unaligned_64 *) (a))->l)
#define AV_WN16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
#define AV_WN32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
#define AV_WN64(a, b) (((struct unaligned_64 *) (a))->l) = (b)
#else /* __GNUC__ */
#define AV_RN16(a) (*((uint16_t*)(a)))
#define AV_RN32(a) (*((uint32_t*)(a)))
#define AV_RN64(a) (*((uint64_t*)(a)))
#define AV_WN16(a, b) *((uint16_t*)(a)) = (b)
#define AV_WN32(a, b) *((uint32_t*)(a)) = (b)
#define AV_WN64(a, b) *((uint64_t*)(a)) = (b)
#endif /* !__GNUC__ */
/* endian macros */
#define AV_RB8(x) (((uint8_t*)(x))[0])
#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
#define AV_RL8(x) AV_RB8(x)
#define AV_WL8(p, d) AV_WB8(p, d)
#ifdef HAVE_FAST_UNALIGNED
# ifdef WORDS_BIGENDIAN
# define AV_RB16(x) AV_RN16(x)
# define AV_WB16(p, d) AV_WN16(p, d)
# define AV_RL16(x) bswap_16(AV_RN16(x))
# define AV_WL16(p, d) AV_WN16(p, bswap_16(d))
# else /* WORDS_BIGENDIAN */
# define AV_RB16(x) bswap_16(AV_RN16(x))
# define AV_WB16(p, d) AV_WN16(p, bswap_16(d))
# define AV_RL16(x) AV_RN16(x)
# define AV_WL16(p, d) AV_WN16(p, d)
# endif
#else /* HAVE_FAST_UNALIGNED */
#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define AV_WB16(p, d) do { \
((uint8_t*)(p))[1] = (d); \
((uint8_t*)(p))[0] = (d)>>8; } while(0)
#define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#define AV_WL16(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; } while(0)
#endif
#define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[2])
#define AV_WB24(p, d) do { \
((uint8_t*)(p))[2] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[0] = (d)>>16; } while(0)
#define AV_RL24(x) ((((uint8_t*)(x))[2] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#define AV_WL24(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; } while(0)
#ifdef HAVE_FAST_UNALIGNED
# ifdef WORDS_BIGENDIAN
# define AV_RB32(x) AV_RN32(x)
# define AV_WB32(p, d) AV_WN32(p, d)
# define AV_RL32(x) bswap_32(AV_RN32(x))
# define AV_WL32(p, d) AV_WN32(p, bswap_32(d))
# else /* WORDS_BIGENDIAN */
# define AV_RB32(x) bswap_32(AV_RN32(x))
# define AV_WB32(p, d) AV_WN32(p, bswap_32(d))
# define AV_RL32(x) AV_RN32(x)
# define AV_WL32(p, d) AV_WN32(p, d)
# endif
#else /* HAVE_FAST_UNALIGNED */
#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define AV_WB32(p, d) do { \
((uint8_t*)(p))[3] = (d); \
((uint8_t*)(p))[2] = (d)>>8; \
((uint8_t*)(p))[1] = (d)>>16; \
((uint8_t*)(p))[0] = (d)>>24; } while(0)
#define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \
(((uint8_t*)(x))[2] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#define AV_WL32(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; } while(0)
#endif
#ifdef HAVE_FAST_UNALIGNED
# ifdef WORDS_BIGENDIAN
# define AV_RB64(x) AV_RN64(x)
# define AV_WB64(p, d) AV_WN64(p, d)
# define AV_RL64(x) bswap_64(AV_RN64(x))
# define AV_WL64(p, d) AV_WN64(p, bswap_64(d))
# else /* WORDS_BIGENDIAN */
# define AV_RB64(x) bswap_64(AV_RN64(x))
# define AV_WB64(p, d) AV_WN64(p, bswap_64(d))
# define AV_RL64(x) AV_RN64(x)
# define AV_WL64(p, d) AV_WN64(p, d)
# endif
#else /* HAVE_FAST_UNALIGNED */
#define AV_RB64(x) (((uint64_t)((uint8_t*)(x))[0] << 56) | \
((uint64_t)((uint8_t*)(x))[1] << 48) | \
((uint64_t)((uint8_t*)(x))[2] << 40) | \
((uint64_t)((uint8_t*)(x))[3] << 32) | \
((uint64_t)((uint8_t*)(x))[4] << 24) | \
((uint64_t)((uint8_t*)(x))[5] << 16) | \
((uint64_t)((uint8_t*)(x))[6] << 8) | \
(uint64_t)((uint8_t*)(x))[7])
#define AV_WB64(p, d) do { \
((uint8_t*)(p))[7] = (d); \
((uint8_t*)(p))[6] = (d)>>8; \
((uint8_t*)(p))[5] = (d)>>16; \
((uint8_t*)(p))[4] = (d)>>24; \
((uint8_t*)(p))[3] = (d)>>32; \
((uint8_t*)(p))[2] = (d)>>40; \
((uint8_t*)(p))[1] = (d)>>48; \
((uint8_t*)(p))[0] = (d)>>56; } while(0)
#define AV_RL64(x) (((uint64_t)((uint8_t*)(x))[7] << 56) | \
((uint64_t)((uint8_t*)(x))[6] << 48) | \
((uint64_t)((uint8_t*)(x))[5] << 40) | \
((uint64_t)((uint8_t*)(x))[4] << 32) | \
((uint64_t)((uint8_t*)(x))[3] << 24) | \
((uint64_t)((uint8_t*)(x))[2] << 16) | \
((uint64_t)((uint8_t*)(x))[1] << 8) | \
(uint64_t)((uint8_t*)(x))[0])
#define AV_WL64(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; \
((uint8_t*)(p))[4] = (d)>>32; \
((uint8_t*)(p))[5] = (d)>>40; \
((uint8_t*)(p))[6] = (d)>>48; \
((uint8_t*)(p))[7] = (d)>>56; } while(0)
#endif
#endif /* FFMPEG_INTREADWRITE_H */
|
