2 * This file is part of FFmpeg.
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.
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.
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
19 #ifndef AVUTIL_INTREADWRITE_H
20 #define AVUTIL_INTREADWRITE_H
27 * Arch-specific headers can provide any combination of
28 * AV_[RW][BLN](16|24|32|64) macros. Preprocessor symbols must be
29 * defined, even if these are implemented as inline functions.
33 # include "arm/intreadwrite.h"
35 # include "mips/intreadwrite.h"
37 # include "ppc/intreadwrite.h"
41 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
46 # if defined(AV_RN16) && !defined(AV_RB16)
47 # define AV_RB16(p) AV_RN16(p)
48 # elif !defined(AV_RN16) && defined(AV_RB16)
49 # define AV_RN16(p) AV_RB16(p)
52 # if defined(AV_WN16) && !defined(AV_WB16)
53 # define AV_WB16(p, v) AV_WN16(p, v)
54 # elif !defined(AV_WN16) && defined(AV_WB16)
55 # define AV_WN16(p, v) AV_WB16(p, v)
58 # if defined(AV_RN32) && !defined(AV_RB32)
59 # define AV_RB32(p) AV_RN32(p)
60 # elif !defined(AV_RN32) && defined(AV_RB32)
61 # define AV_RN32(p) AV_RB32(p)
64 # if defined(AV_RN24) && !defined(AV_RB24)
65 # define AV_RB24(p) AV_RN24(p)
66 # elif !defined(AV_RN24) && defined(AV_RB24)
67 # define AV_RN24(p) AV_RB24(p)
70 # if defined(AV_WN24) && !defined(AV_WB24)
71 # define AV_WB24(p, v) AV_WN24(p, v)
72 # elif !defined(AV_WN24) && defined(AV_WB24)
73 # define AV_WN24(p, v) AV_WB24(p, v)
76 # if defined(AV_WN32) && !defined(AV_WB32)
77 # define AV_WB32(p, v) AV_WN32(p, v)
78 # elif !defined(AV_WN32) && defined(AV_WB32)
79 # define AV_WN32(p, v) AV_WB32(p, v)
82 # if defined(AV_RN64) && !defined(AV_RB64)
83 # define AV_RB64(p) AV_RN64(p)
84 # elif !defined(AV_RN64) && defined(AV_RB64)
85 # define AV_RN64(p) AV_RB64(p)
88 # if defined(AV_WN64) && !defined(AV_WB64)
89 # define AV_WB64(p, v) AV_WN64(p, v)
90 # elif !defined(AV_WN64) && defined(AV_WB64)
91 # define AV_WN64(p, v) AV_WB64(p, v)
94 #else /* HAVE_BIGENDIAN */
96 # if defined(AV_RN16) && !defined(AV_RL16)
97 # define AV_RL16(p) AV_RN16(p)
98 # elif !defined(AV_RN16) && defined(AV_RL16)
99 # define AV_RN16(p) AV_RL16(p)
102 # if defined(AV_WN16) && !defined(AV_WL16)
103 # define AV_WL16(p, v) AV_WN16(p, v)
104 # elif !defined(AV_WN16) && defined(AV_WL16)
105 # define AV_WN16(p, v) AV_WL16(p, v)
108 # if defined(AV_RN32) && !defined(AV_RL32)
109 # define AV_RL32(p) AV_RN32(p)
110 # elif !defined(AV_RN32) && defined(AV_RL32)
111 # define AV_RN32(p) AV_RL32(p)
114 # if defined(AV_RN24) && !defined(AV_RL24)
115 # define AV_RL24(p) AV_RN24(p)
116 # elif !defined(AV_RN24) && defined(AV_RL24)
117 # define AV_RN24(p) AV_RL24(p)
120 # if defined(AV_WN24) && !defined(AV_WL24)
121 # define AV_WL24(p, v) AV_WN24(p, v)
122 # elif !defined(AV_WN24) && defined(AV_WL24)
123 # define AV_WN24(p, v) AV_WL24(p, v)
126 # if defined(AV_WN32) && !defined(AV_WL32)
127 # define AV_WL32(p, v) AV_WN32(p, v)
128 # elif !defined(AV_WN32) && defined(AV_WL32)
129 # define AV_WN32(p, v) AV_WL32(p, v)
132 # if defined(AV_RN64) && !defined(AV_RL64)
133 # define AV_RL64(p) AV_RN64(p)
134 # elif !defined(AV_RN64) && defined(AV_RL64)
135 # define AV_RN64(p) AV_RL64(p)
138 # if defined(AV_WN64) && !defined(AV_WL64)
139 # define AV_WL64(p, v) AV_WN64(p, v)
140 # elif !defined(AV_WN64) && defined(AV_WL64)
141 # define AV_WN64(p, v) AV_WL64(p, v)
144 #endif /* !HAVE_BIGENDIAN */
147 * Define AV_[RW]N helper macros to simplify definitions not provided
148 * by per-arch headers.
151 #if HAVE_ATTRIBUTE_PACKED
153 struct unaligned_64 { uint64_t l; } __attribute__((packed));
154 struct unaligned_32 { uint32_t l; } __attribute__((packed));
155 struct unaligned_16 { uint16_t l; } __attribute__((packed));
157 # define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l)
158 # define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v)
160 #elif defined(__DECC)
162 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
163 # define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v)
165 #elif HAVE_FAST_UNALIGNED
167 # define AV_RN(s, p) (*((const uint##s##_t*)(p)))
168 # define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v)
173 #define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | \
174 ((const uint8_t*)(x))[1])
177 #define AV_WB16(p, d) do { \
178 ((uint8_t*)(p))[1] = (d); \
179 ((uint8_t*)(p))[0] = (d)>>8; } while(0)
183 #define AV_RL16(x) ((((const uint8_t*)(x))[1] << 8) | \
184 ((const uint8_t*)(x))[0])
187 #define AV_WL16(p, d) do { \
188 ((uint8_t*)(p))[0] = (d); \
189 ((uint8_t*)(p))[1] = (d)>>8; } while(0)
193 #define AV_RB32(x) ((((const uint8_t*)(x))[0] << 24) | \
194 (((const uint8_t*)(x))[1] << 16) | \
195 (((const uint8_t*)(x))[2] << 8) | \
196 ((const uint8_t*)(x))[3])
199 #define AV_WB32(p, d) do { \
200 ((uint8_t*)(p))[3] = (d); \
201 ((uint8_t*)(p))[2] = (d)>>8; \
202 ((uint8_t*)(p))[1] = (d)>>16; \
203 ((uint8_t*)(p))[0] = (d)>>24; } while(0)
207 #define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \
208 (((const uint8_t*)(x))[2] << 16) | \
209 (((const uint8_t*)(x))[1] << 8) | \
210 ((const uint8_t*)(x))[0])
213 #define AV_WL32(p, d) do { \
214 ((uint8_t*)(p))[0] = (d); \
215 ((uint8_t*)(p))[1] = (d)>>8; \
216 ((uint8_t*)(p))[2] = (d)>>16; \
217 ((uint8_t*)(p))[3] = (d)>>24; } while(0)
221 #define AV_RB64(x) (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
222 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
223 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
224 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
225 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
226 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
227 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
228 (uint64_t)((const uint8_t*)(x))[7])
231 #define AV_WB64(p, d) do { \
232 ((uint8_t*)(p))[7] = (d); \
233 ((uint8_t*)(p))[6] = (d)>>8; \
234 ((uint8_t*)(p))[5] = (d)>>16; \
235 ((uint8_t*)(p))[4] = (d)>>24; \
236 ((uint8_t*)(p))[3] = (d)>>32; \
237 ((uint8_t*)(p))[2] = (d)>>40; \
238 ((uint8_t*)(p))[1] = (d)>>48; \
239 ((uint8_t*)(p))[0] = (d)>>56; } while(0)
243 #define AV_RL64(x) (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
244 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
245 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
246 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
247 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
248 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
249 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
250 (uint64_t)((const uint8_t*)(x))[0])
253 #define AV_WL64(p, d) do { \
254 ((uint8_t*)(p))[0] = (d); \
255 ((uint8_t*)(p))[1] = (d)>>8; \
256 ((uint8_t*)(p))[2] = (d)>>16; \
257 ((uint8_t*)(p))[3] = (d)>>24; \
258 ((uint8_t*)(p))[4] = (d)>>32; \
259 ((uint8_t*)(p))[5] = (d)>>40; \
260 ((uint8_t*)(p))[6] = (d)>>48; \
261 ((uint8_t*)(p))[7] = (d)>>56; } while(0)
265 # define AV_RN(s, p) AV_RB##s(p)
266 # define AV_WN(s, p, v) AV_WB##s(p, v)
268 # define AV_RN(s, p) AV_RL##s(p)
269 # define AV_WN(s, p, v) AV_WL##s(p, v)
272 #endif /* HAVE_FAST_UNALIGNED */
275 # define AV_RN16(p) AV_RN(16, p)
279 # define AV_RN32(p) AV_RN(32, p)
283 # define AV_RN64(p) AV_RN(64, p)
287 # define AV_WN16(p, v) AV_WN(16, p, v)
291 # define AV_WN32(p, v) AV_WN(32, p, v)
295 # define AV_WN64(p, v) AV_WN(64, p, v)
299 # define AV_RB(s, p) AV_RN##s(p)
300 # define AV_WB(s, p, v) AV_WN##s(p, v)
301 # define AV_RL(s, p) bswap_##s(AV_RN##s(p))
302 # define AV_WL(s, p, v) AV_WN##s(p, bswap_##s(v))
304 # define AV_RB(s, p) bswap_##s(AV_RN##s(p))
305 # define AV_WB(s, p, v) AV_WN##s(p, bswap_##s(v))
306 # define AV_RL(s, p) AV_RN##s(p)
307 # define AV_WL(s, p, v) AV_WN##s(p, v)
310 #define AV_RB8(x) (((const uint8_t*)(x))[0])
311 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
313 #define AV_RL8(x) AV_RB8(x)
314 #define AV_WL8(p, d) AV_WB8(p, d)
317 # define AV_RB16(p) AV_RB(16, p)
320 # define AV_WB16(p, v) AV_WB(16, p, v)
324 # define AV_RL16(p) AV_RL(16, p)
327 # define AV_WL16(p, v) AV_WL(16, p, v)
331 # define AV_RB32(p) AV_RB(32, p)
334 # define AV_WB32(p, v) AV_WB(32, p, v)
338 # define AV_RL32(p) AV_RL(32, p)
341 # define AV_WL32(p, v) AV_WL(32, p, v)
345 # define AV_RB64(p) AV_RB(64, p)
348 # define AV_WB64(p, v) AV_WB(64, p, v)
352 # define AV_RL64(p) AV_RL(64, p)
355 # define AV_WL64(p, v) AV_WL(64, p, v)
359 #define AV_RB24(x) ((((const uint8_t*)(x))[0] << 16) | \
360 (((const uint8_t*)(x))[1] << 8) | \
361 ((const uint8_t*)(x))[2])
364 #define AV_WB24(p, d) do { \
365 ((uint8_t*)(p))[2] = (d); \
366 ((uint8_t*)(p))[1] = (d)>>8; \
367 ((uint8_t*)(p))[0] = (d)>>16; } while(0)
371 #define AV_RL24(x) ((((const uint8_t*)(x))[2] << 16) | \
372 (((const uint8_t*)(x))[1] << 8) | \
373 ((const uint8_t*)(x))[0])
376 #define AV_WL24(p, d) do { \
377 ((uint8_t*)(p))[0] = (d); \
378 ((uint8_t*)(p))[1] = (d)>>8; \
379 ((uint8_t*)(p))[2] = (d)>>16; } while(0)
382 #endif /* AVUTIL_INTREADWRITE_H */