Statistics
| Branch: | Revision:

ffmpeg / libavutil / intreadwrite.h @ b76e3424

History | View | Annotate | Download (7.42 KB)

1 f5a90186 Diego Biurrun
/*
2
 * This file is part of FFmpeg.
3
 *
4
 * FFmpeg is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
6
 * License as published by the Free Software Foundation; either
7
 * version 2.1 of the License, or (at your option) any later version.
8
 *
9
 * FFmpeg is distributed in the hope that it will be useful,
10
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12
 * Lesser General Public License for more details.
13
 *
14
 * You should have received a copy of the GNU Lesser General Public
15
 * License along with FFmpeg; if not, write to the Free Software
16
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
 */
18
19 5b21bdab Diego Biurrun
#ifndef FFMPEG_INTREADWRITE_H
20
#define FFMPEG_INTREADWRITE_H
21 cf1e119b Reimar Döffinger
22 99545457 Måns Rullgård
#include <stdint.h>
23 a087028a Diego Biurrun
#include "config.h"
24 c08be350 Reimar Döffinger
#include "bswap.h"
25 99545457 Måns Rullgård
26 cf1e119b Reimar Döffinger
#ifdef __GNUC__
27
28
struct unaligned_64 { uint64_t l; } __attribute__((packed));
29
struct unaligned_32 { uint32_t l; } __attribute__((packed));
30
struct unaligned_16 { uint16_t l; } __attribute__((packed));
31
32 905694d9 Roman Shaposhnik
#define AV_RN16(a) (((const struct unaligned_16 *) (a))->l)
33
#define AV_RN32(a) (((const struct unaligned_32 *) (a))->l)
34
#define AV_RN64(a) (((const struct unaligned_64 *) (a))->l)
35 cf1e119b Reimar Döffinger
36 905694d9 Roman Shaposhnik
#define AV_WN16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
37
#define AV_WN32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
38
#define AV_WN64(a, b) (((struct unaligned_64 *) (a))->l) = (b)
39 cf1e119b Reimar Döffinger
40 b7b38fb2 Måns Rullgård
#elif defined(__DECC)
41
42
#define AV_RN16(a) (*((const __unaligned uint16_t*)(a)))
43
#define AV_RN32(a) (*((const __unaligned uint32_t*)(a)))
44
#define AV_RN64(a) (*((const __unaligned uint64_t*)(a)))
45
46
#define AV_WN16(a, b) *((__unaligned uint16_t*)(a)) = (b)
47
#define AV_WN32(a, b) *((__unaligned uint32_t*)(a)) = (b)
48
#define AV_WN64(a, b) *((__unaligned uint64_t*)(a)) = (b)
49
50
#else
51 cf1e119b Reimar Döffinger
52 ff794171 Michael Niedermayer
#define AV_RN16(a) (*((const uint16_t*)(a)))
53
#define AV_RN32(a) (*((const uint32_t*)(a)))
54
#define AV_RN64(a) (*((const uint64_t*)(a)))
55 cf1e119b Reimar Döffinger
56 905694d9 Roman Shaposhnik
#define AV_WN16(a, b) *((uint16_t*)(a)) = (b)
57
#define AV_WN32(a, b) *((uint32_t*)(a)) = (b)
58
#define AV_WN64(a, b) *((uint64_t*)(a)) = (b)
59 cf1e119b Reimar Döffinger
60
#endif /* !__GNUC__ */
61
62
/* endian macros */
63 ff794171 Michael Niedermayer
#define AV_RB8(x)     (((const uint8_t*)(x))[0])
64 803ca89c Jindřich Makovička
#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)
65 a3550abd Alex Beregszaszi
66 85b1a722 Diego Biurrun
#define AV_RL8(x)     AV_RB8(x)
67
#define AV_WL8(p, d)  AV_WB8(p, d)
68
69 7b829d2a Ramiro Polla
#ifdef HAVE_FAST_UNALIGNED
70
# ifdef WORDS_BIGENDIAN
71 905694d9 Roman Shaposhnik
#  define AV_RB16(x)    AV_RN16(x)
72
#  define AV_WB16(p, d) AV_WN16(p, d)
73 7b829d2a Ramiro Polla
74 905694d9 Roman Shaposhnik
#  define AV_RL16(x)    bswap_16(AV_RN16(x))
75
#  define AV_WL16(p, d) AV_WN16(p, bswap_16(d))
76 fbbea48e Måns Rullgård
77
#  define AV_RB32(x)    AV_RN32(x)
78
#  define AV_WB32(p, d) AV_WN32(p, d)
79
80
#  define AV_RL32(x)    bswap_32(AV_RN32(x))
81
#  define AV_WL32(p, d) AV_WN32(p, bswap_32(d))
82
83
#  define AV_RB64(x)    AV_RN64(x)
84
#  define AV_WB64(p, d) AV_WN64(p, d)
85
86
#  define AV_RL64(x)    bswap_64(AV_RN64(x))
87
#  define AV_WL64(p, d) AV_WN64(p, bswap_64(d))
88 7b829d2a Ramiro Polla
# else /* WORDS_BIGENDIAN */
89 905694d9 Roman Shaposhnik
#  define AV_RB16(x)    bswap_16(AV_RN16(x))
90
#  define AV_WB16(p, d) AV_WN16(p, bswap_16(d))
91 7b829d2a Ramiro Polla
92 905694d9 Roman Shaposhnik
#  define AV_RL16(x)    AV_RN16(x)
93
#  define AV_WL16(p, d) AV_WN16(p, d)
94 fbbea48e Måns Rullgård
95
#  define AV_RB32(x)    bswap_32(AV_RN32(x))
96
#  define AV_WB32(p, d) AV_WN32(p, bswap_32(d))
97
98
#  define AV_RL32(x)    AV_RN32(x)
99
#  define AV_WL32(p, d) AV_WN32(p, d)
100
101
#  define AV_RB64(x)    bswap_64(AV_RN64(x))
102
#  define AV_WB64(p, d) AV_WN64(p, bswap_64(d))
103
104
#  define AV_RL64(x)    AV_RN64(x)
105
#  define AV_WL64(p, d) AV_WN64(p, d)
106 7b829d2a Ramiro Polla
# endif
107
#else /* HAVE_FAST_UNALIGNED */
108 ff794171 Michael Niedermayer
#define AV_RB16(x)  ((((const uint8_t*)(x))[0] << 8) | ((const uint8_t*)(x))[1])
109 803ca89c Jindřich Makovička
#define AV_WB16(p, d) do { \
110 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[1] = (d); \
111 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>8; } while(0)
112 a3550abd Alex Beregszaszi
113 ff794171 Michael Niedermayer
#define AV_RL16(x)  ((((const uint8_t*)(x))[1] << 8) | \
114
                      ((const uint8_t*)(x))[0])
115 803ca89c Jindřich Makovička
#define AV_WL16(p, d) do { \
116 85b1a722 Diego Biurrun
                    ((uint8_t*)(p))[0] = (d); \
117 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[1] = (d)>>8; } while(0)
118 7b829d2a Ramiro Polla
119 ff794171 Michael Niedermayer
#define AV_RB32(x)  ((((const uint8_t*)(x))[0] << 24) | \
120
                     (((const uint8_t*)(x))[1] << 16) | \
121
                     (((const uint8_t*)(x))[2] <<  8) | \
122
                      ((const uint8_t*)(x))[3])
123 803ca89c Jindřich Makovička
#define AV_WB32(p, d) do { \
124 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[3] = (d); \
125
                    ((uint8_t*)(p))[2] = (d)>>8; \
126
                    ((uint8_t*)(p))[1] = (d)>>16; \
127 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>24; } while(0)
128 a3550abd Alex Beregszaszi
129 ff794171 Michael Niedermayer
#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \
130
                    (((const uint8_t*)(x))[2] << 16) | \
131
                    (((const uint8_t*)(x))[1] <<  8) | \
132
                     ((const uint8_t*)(x))[0])
133 803ca89c Jindřich Makovička
#define AV_WL32(p, d) do { \
134 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[0] = (d); \
135
                    ((uint8_t*)(p))[1] = (d)>>8; \
136
                    ((uint8_t*)(p))[2] = (d)>>16; \
137 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[3] = (d)>>24; } while(0)
138 9e010b41 Ivo van Poorten
139 ff794171 Michael Niedermayer
#define AV_RB64(x)  (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
140
                     ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
141
                     ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
142
                     ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
143
                     ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
144
                     ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
145
                     ((uint64_t)((const uint8_t*)(x))[6] <<  8) | \
146
                      (uint64_t)((const uint8_t*)(x))[7])
147 803ca89c Jindřich Makovička
#define AV_WB64(p, d) do { \
148 9e010b41 Ivo van Poorten
                    ((uint8_t*)(p))[7] = (d);     \
149
                    ((uint8_t*)(p))[6] = (d)>>8;  \
150
                    ((uint8_t*)(p))[5] = (d)>>16; \
151
                    ((uint8_t*)(p))[4] = (d)>>24; \
152
                    ((uint8_t*)(p))[3] = (d)>>32; \
153
                    ((uint8_t*)(p))[2] = (d)>>40; \
154
                    ((uint8_t*)(p))[1] = (d)>>48; \
155 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>56; } while(0)
156 9e010b41 Ivo van Poorten
157 ff794171 Michael Niedermayer
#define AV_RL64(x)  (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
158
                     ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
159
                     ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
160
                     ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
161
                     ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
162
                     ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
163
                     ((uint64_t)((const uint8_t*)(x))[1] <<  8) | \
164
                      (uint64_t)((const uint8_t*)(x))[0])
165 803ca89c Jindřich Makovička
#define AV_WL64(p, d) do { \
166 9e010b41 Ivo van Poorten
                    ((uint8_t*)(p))[0] = (d);     \
167
                    ((uint8_t*)(p))[1] = (d)>>8;  \
168
                    ((uint8_t*)(p))[2] = (d)>>16; \
169
                    ((uint8_t*)(p))[3] = (d)>>24; \
170
                    ((uint8_t*)(p))[4] = (d)>>32; \
171
                    ((uint8_t*)(p))[5] = (d)>>40; \
172
                    ((uint8_t*)(p))[6] = (d)>>48; \
173 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[7] = (d)>>56; } while(0)
174 fbbea48e Måns Rullgård
#endif  /* HAVE_FAST_UNALIGNED */
175
176
#define AV_RB24(x)  ((((const uint8_t*)(x))[0] << 16) | \
177
                     (((const uint8_t*)(x))[1] <<  8) | \
178
                      ((const uint8_t*)(x))[2])
179
#define AV_WB24(p, d) do { \
180
                    ((uint8_t*)(p))[2] = (d); \
181
                    ((uint8_t*)(p))[1] = (d)>>8; \
182
                    ((uint8_t*)(p))[0] = (d)>>16; } while(0)
183
184
#define AV_RL24(x)  ((((const uint8_t*)(x))[2] << 16) | \
185
                     (((const uint8_t*)(x))[1] <<  8) | \
186
                      ((const uint8_t*)(x))[0])
187
#define AV_WL24(p, d) do { \
188
                    ((uint8_t*)(p))[0] = (d); \
189
                    ((uint8_t*)(p))[1] = (d)>>8; \
190
                    ((uint8_t*)(p))[2] = (d)>>16; } while(0)
191 9e010b41 Ivo van Poorten
192 5b21bdab Diego Biurrun
#endif /* FFMPEG_INTREADWRITE_H */