Statistics
| Branch: | Revision:

ffmpeg / libavutil / intreadwrite.h @ 0871ae1a

History | View | Annotate | Download (7.29 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
#else /* __GNUC__ */
41
42 ff794171 Michael Niedermayer
#define AV_RN16(a) (*((const uint16_t*)(a)))
43
#define AV_RN32(a) (*((const uint32_t*)(a)))
44
#define AV_RN64(a) (*((const uint64_t*)(a)))
45 cf1e119b Reimar Döffinger
46 905694d9 Roman Shaposhnik
#define AV_WN16(a, b) *((uint16_t*)(a)) = (b)
47
#define AV_WN32(a, b) *((uint32_t*)(a)) = (b)
48
#define AV_WN64(a, b) *((uint64_t*)(a)) = (b)
49 cf1e119b Reimar Döffinger
50
#endif /* !__GNUC__ */
51
52
/* endian macros */
53 ff794171 Michael Niedermayer
#define AV_RB8(x)     (((const uint8_t*)(x))[0])
54 803ca89c Jindřich Makovička
#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)
55 a3550abd Alex Beregszaszi
56 85b1a722 Diego Biurrun
#define AV_RL8(x)     AV_RB8(x)
57
#define AV_WL8(p, d)  AV_WB8(p, d)
58
59 7b829d2a Ramiro Polla
#ifdef HAVE_FAST_UNALIGNED
60
# ifdef WORDS_BIGENDIAN
61 905694d9 Roman Shaposhnik
#  define AV_RB16(x)    AV_RN16(x)
62
#  define AV_WB16(p, d) AV_WN16(p, d)
63 7b829d2a Ramiro Polla
64 905694d9 Roman Shaposhnik
#  define AV_RL16(x)    bswap_16(AV_RN16(x))
65
#  define AV_WL16(p, d) AV_WN16(p, bswap_16(d))
66 7b829d2a Ramiro Polla
# else /* WORDS_BIGENDIAN */
67 905694d9 Roman Shaposhnik
#  define AV_RB16(x)    bswap_16(AV_RN16(x))
68
#  define AV_WB16(p, d) AV_WN16(p, bswap_16(d))
69 7b829d2a Ramiro Polla
70 905694d9 Roman Shaposhnik
#  define AV_RL16(x)    AV_RN16(x)
71
#  define AV_WL16(p, d) AV_WN16(p, d)
72 7b829d2a Ramiro Polla
# endif
73
#else /* HAVE_FAST_UNALIGNED */
74 ff794171 Michael Niedermayer
#define AV_RB16(x)  ((((const uint8_t*)(x))[0] << 8) | ((const uint8_t*)(x))[1])
75 803ca89c Jindřich Makovička
#define AV_WB16(p, d) do { \
76 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[1] = (d); \
77 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>8; } while(0)
78 a3550abd Alex Beregszaszi
79 ff794171 Michael Niedermayer
#define AV_RL16(x)  ((((const uint8_t*)(x))[1] << 8) | \
80
                      ((const uint8_t*)(x))[0])
81 803ca89c Jindřich Makovička
#define AV_WL16(p, d) do { \
82 85b1a722 Diego Biurrun
                    ((uint8_t*)(p))[0] = (d); \
83 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[1] = (d)>>8; } while(0)
84 7b829d2a Ramiro Polla
#endif
85 85b1a722 Diego Biurrun
86 ff794171 Michael Niedermayer
#define AV_RB24(x)  ((((const uint8_t*)(x))[0] << 16) | \
87
                     (((const uint8_t*)(x))[1] <<  8) | \
88
                      ((const uint8_t*)(x))[2])
89 803ca89c Jindřich Makovička
#define AV_WB24(p, d) do { \
90 626b7c0f Baptiste Coudurier
                    ((uint8_t*)(p))[2] = (d); \
91
                    ((uint8_t*)(p))[1] = (d)>>8; \
92 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>16; } while(0)
93 626b7c0f Baptiste Coudurier
94 ff794171 Michael Niedermayer
#define AV_RL24(x)  ((((const uint8_t*)(x))[2] << 16) | \
95
                     (((const uint8_t*)(x))[1] <<  8) | \
96
                      ((const uint8_t*)(x))[0])
97 803ca89c Jindřich Makovička
#define AV_WL24(p, d) do { \
98 85b1a722 Diego Biurrun
                    ((uint8_t*)(p))[0] = (d); \
99
                    ((uint8_t*)(p))[1] = (d)>>8; \
100 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[2] = (d)>>16; } while(0)
101 85b1a722 Diego Biurrun
102 7b829d2a Ramiro Polla
#ifdef HAVE_FAST_UNALIGNED
103
# ifdef WORDS_BIGENDIAN
104 905694d9 Roman Shaposhnik
#  define AV_RB32(x)    AV_RN32(x)
105
#  define AV_WB32(p, d) AV_WN32(p, d)
106 7b829d2a Ramiro Polla
107 905694d9 Roman Shaposhnik
#  define AV_RL32(x)    bswap_32(AV_RN32(x))
108
#  define AV_WL32(p, d) AV_WN32(p, bswap_32(d))
109 7b829d2a Ramiro Polla
# else /* WORDS_BIGENDIAN */
110 905694d9 Roman Shaposhnik
#  define AV_RB32(x)    bswap_32(AV_RN32(x))
111
#  define AV_WB32(p, d) AV_WN32(p, bswap_32(d))
112 7b829d2a Ramiro Polla
113 905694d9 Roman Shaposhnik
#  define AV_RL32(x)    AV_RN32(x)
114
#  define AV_WL32(p, d) AV_WN32(p, d)
115 7b829d2a Ramiro Polla
# endif
116
#else /* HAVE_FAST_UNALIGNED */
117 ff794171 Michael Niedermayer
#define AV_RB32(x)  ((((const uint8_t*)(x))[0] << 24) | \
118
                     (((const uint8_t*)(x))[1] << 16) | \
119
                     (((const uint8_t*)(x))[2] <<  8) | \
120
                      ((const uint8_t*)(x))[3])
121 803ca89c Jindřich Makovička
#define AV_WB32(p, d) do { \
122 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[3] = (d); \
123
                    ((uint8_t*)(p))[2] = (d)>>8; \
124
                    ((uint8_t*)(p))[1] = (d)>>16; \
125 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>24; } while(0)
126 a3550abd Alex Beregszaszi
127 ff794171 Michael Niedermayer
#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \
128
                    (((const uint8_t*)(x))[2] << 16) | \
129
                    (((const uint8_t*)(x))[1] <<  8) | \
130
                     ((const uint8_t*)(x))[0])
131 803ca89c Jindřich Makovička
#define AV_WL32(p, d) do { \
132 7d4495da Michael Niedermayer
                    ((uint8_t*)(p))[0] = (d); \
133
                    ((uint8_t*)(p))[1] = (d)>>8; \
134
                    ((uint8_t*)(p))[2] = (d)>>16; \
135 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[3] = (d)>>24; } while(0)
136 7b829d2a Ramiro Polla
#endif
137 cf1e119b Reimar Döffinger
138 9e010b41 Ivo van Poorten
#ifdef HAVE_FAST_UNALIGNED
139
# ifdef WORDS_BIGENDIAN
140 905694d9 Roman Shaposhnik
#  define AV_RB64(x)    AV_RN64(x)
141
#  define AV_WB64(p, d) AV_WN64(p, d)
142 9e010b41 Ivo van Poorten
143 905694d9 Roman Shaposhnik
#  define AV_RL64(x)    bswap_64(AV_RN64(x))
144
#  define AV_WL64(p, d) AV_WN64(p, bswap_64(d))
145 9e010b41 Ivo van Poorten
# else /* WORDS_BIGENDIAN */
146 905694d9 Roman Shaposhnik
#  define AV_RB64(x)    bswap_64(AV_RN64(x))
147
#  define AV_WB64(p, d) AV_WN64(p, bswap_64(d))
148 9e010b41 Ivo van Poorten
149 905694d9 Roman Shaposhnik
#  define AV_RL64(x)    AV_RN64(x)
150
#  define AV_WL64(p, d) AV_WN64(p, d)
151 9e010b41 Ivo van Poorten
# endif
152
#else /* HAVE_FAST_UNALIGNED */
153 ff794171 Michael Niedermayer
#define AV_RB64(x)  (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
154
                     ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
155
                     ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
156
                     ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
157
                     ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
158
                     ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
159
                     ((uint64_t)((const uint8_t*)(x))[6] <<  8) | \
160
                      (uint64_t)((const uint8_t*)(x))[7])
161 803ca89c Jindřich Makovička
#define AV_WB64(p, d) do { \
162 9e010b41 Ivo van Poorten
                    ((uint8_t*)(p))[7] = (d);     \
163
                    ((uint8_t*)(p))[6] = (d)>>8;  \
164
                    ((uint8_t*)(p))[5] = (d)>>16; \
165
                    ((uint8_t*)(p))[4] = (d)>>24; \
166
                    ((uint8_t*)(p))[3] = (d)>>32; \
167
                    ((uint8_t*)(p))[2] = (d)>>40; \
168
                    ((uint8_t*)(p))[1] = (d)>>48; \
169 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[0] = (d)>>56; } while(0)
170 9e010b41 Ivo van Poorten
171 ff794171 Michael Niedermayer
#define AV_RL64(x)  (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
172
                     ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
173
                     ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
174
                     ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
175
                     ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
176
                     ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
177
                     ((uint64_t)((const uint8_t*)(x))[1] <<  8) | \
178
                      (uint64_t)((const uint8_t*)(x))[0])
179 803ca89c Jindřich Makovička
#define AV_WL64(p, d) do { \
180 9e010b41 Ivo van Poorten
                    ((uint8_t*)(p))[0] = (d);     \
181
                    ((uint8_t*)(p))[1] = (d)>>8;  \
182
                    ((uint8_t*)(p))[2] = (d)>>16; \
183
                    ((uint8_t*)(p))[3] = (d)>>24; \
184
                    ((uint8_t*)(p))[4] = (d)>>32; \
185
                    ((uint8_t*)(p))[5] = (d)>>40; \
186
                    ((uint8_t*)(p))[6] = (d)>>48; \
187 803ca89c Jindřich Makovička
                    ((uint8_t*)(p))[7] = (d)>>56; } while(0)
188 9e010b41 Ivo van Poorten
#endif
189
190 5b21bdab Diego Biurrun
#endif /* FFMPEG_INTREADWRITE_H */