2 * This file is part of Libav.
4 * Libav 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 * Libav 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 Libav; 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
23 #include "libavutil/avconfig.h"
24 #include "attributes.h"
34 } av_alias av_alias64;
41 } av_alias av_alias32;
46 } av_alias av_alias16;
49 * Arch-specific headers can provide any combination of
50 * AV_[RW][BLN](16|24|32|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
51 * Preprocessor symbols must be defined, even if these are implemented
52 * as inline functions.
55 #ifdef HAVE_AV_CONFIG_H
60 # include "arm/intreadwrite.h"
62 # include "avr32/intreadwrite.h"
64 # include "mips/intreadwrite.h"
66 # include "ppc/intreadwrite.h"
68 # include "tomi/intreadwrite.h"
70 # include "x86/intreadwrite.h"
73 #endif /* HAVE_AV_CONFIG_H */
76 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
81 # if defined(AV_RN16) && !defined(AV_RB16)
82 # define AV_RB16(p) AV_RN16(p)
83 # elif !defined(AV_RN16) && defined(AV_RB16)
84 # define AV_RN16(p) AV_RB16(p)
87 # if defined(AV_WN16) && !defined(AV_WB16)
88 # define AV_WB16(p, v) AV_WN16(p, v)
89 # elif !defined(AV_WN16) && defined(AV_WB16)
90 # define AV_WN16(p, v) AV_WB16(p, v)
93 # if defined(AV_RN24) && !defined(AV_RB24)
94 # define AV_RB24(p) AV_RN24(p)
95 # elif !defined(AV_RN24) && defined(AV_RB24)
96 # define AV_RN24(p) AV_RB24(p)
99 # if defined(AV_WN24) && !defined(AV_WB24)
100 # define AV_WB24(p, v) AV_WN24(p, v)
101 # elif !defined(AV_WN24) && defined(AV_WB24)
102 # define AV_WN24(p, v) AV_WB24(p, v)
105 # if defined(AV_RN32) && !defined(AV_RB32)
106 # define AV_RB32(p) AV_RN32(p)
107 # elif !defined(AV_RN32) && defined(AV_RB32)
108 # define AV_RN32(p) AV_RB32(p)
111 # if defined(AV_WN32) && !defined(AV_WB32)
112 # define AV_WB32(p, v) AV_WN32(p, v)
113 # elif !defined(AV_WN32) && defined(AV_WB32)
114 # define AV_WN32(p, v) AV_WB32(p, v)
117 # if defined(AV_RN64) && !defined(AV_RB64)
118 # define AV_RB64(p) AV_RN64(p)
119 # elif !defined(AV_RN64) && defined(AV_RB64)
120 # define AV_RN64(p) AV_RB64(p)
123 # if defined(AV_WN64) && !defined(AV_WB64)
124 # define AV_WB64(p, v) AV_WN64(p, v)
125 # elif !defined(AV_WN64) && defined(AV_WB64)
126 # define AV_WN64(p, v) AV_WB64(p, v)
129 #else /* AV_HAVE_BIGENDIAN */
131 # if defined(AV_RN16) && !defined(AV_RL16)
132 # define AV_RL16(p) AV_RN16(p)
133 # elif !defined(AV_RN16) && defined(AV_RL16)
134 # define AV_RN16(p) AV_RL16(p)
137 # if defined(AV_WN16) && !defined(AV_WL16)
138 # define AV_WL16(p, v) AV_WN16(p, v)
139 # elif !defined(AV_WN16) && defined(AV_WL16)
140 # define AV_WN16(p, v) AV_WL16(p, v)
143 # if defined(AV_RN24) && !defined(AV_RL24)
144 # define AV_RL24(p) AV_RN24(p)
145 # elif !defined(AV_RN24) && defined(AV_RL24)
146 # define AV_RN24(p) AV_RL24(p)
149 # if defined(AV_WN24) && !defined(AV_WL24)
150 # define AV_WL24(p, v) AV_WN24(p, v)
151 # elif !defined(AV_WN24) && defined(AV_WL24)
152 # define AV_WN24(p, v) AV_WL24(p, v)
155 # if defined(AV_RN32) && !defined(AV_RL32)
156 # define AV_RL32(p) AV_RN32(p)
157 # elif !defined(AV_RN32) && defined(AV_RL32)
158 # define AV_RN32(p) AV_RL32(p)
161 # if defined(AV_WN32) && !defined(AV_WL32)
162 # define AV_WL32(p, v) AV_WN32(p, v)
163 # elif !defined(AV_WN32) && defined(AV_WL32)
164 # define AV_WN32(p, v) AV_WL32(p, v)
167 # if defined(AV_RN64) && !defined(AV_RL64)
168 # define AV_RL64(p) AV_RN64(p)
169 # elif !defined(AV_RN64) && defined(AV_RL64)
170 # define AV_RN64(p) AV_RL64(p)
173 # if defined(AV_WN64) && !defined(AV_WL64)
174 # define AV_WL64(p, v) AV_WN64(p, v)
175 # elif !defined(AV_WN64) && defined(AV_WL64)
176 # define AV_WN64(p, v) AV_WL64(p, v)
179 #endif /* !AV_HAVE_BIGENDIAN */
182 * Define AV_[RW]N helper macros to simplify definitions not provided
183 * by per-arch headers.
186 #if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
188 union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
189 union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
190 union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
192 # define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
193 # define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
195 #elif defined(__DECC)
197 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
198 # define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
200 #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64)) && AV_HAVE_FAST_UNALIGNED
202 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
203 # define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
205 #elif AV_HAVE_FAST_UNALIGNED
207 # define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
208 # define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
213 # define AV_RB16(x) \
214 ((((const uint8_t*)(x))[0] << 8) | \
215 ((const uint8_t*)(x))[1])
218 # define AV_WB16(p, val) do { \
220 ((uint8_t*)(p))[1] = (d); \
221 ((uint8_t*)(p))[0] = (d)>>8; \
226 # define AV_RL16(x) \
227 ((((const uint8_t*)(x))[1] << 8) | \
228 ((const uint8_t*)(x))[0])
231 # define AV_WL16(p, val) do { \
233 ((uint8_t*)(p))[0] = (d); \
234 ((uint8_t*)(p))[1] = (d)>>8; \
239 # define AV_RB32(x) \
240 (((uint32_t)((const uint8_t*)(x))[0] << 24) | \
241 (((const uint8_t*)(x))[1] << 16) | \
242 (((const uint8_t*)(x))[2] << 8) | \
243 ((const uint8_t*)(x))[3])
246 # define AV_WB32(p, val) do { \
248 ((uint8_t*)(p))[3] = (d); \
249 ((uint8_t*)(p))[2] = (d)>>8; \
250 ((uint8_t*)(p))[1] = (d)>>16; \
251 ((uint8_t*)(p))[0] = (d)>>24; \
256 # define AV_RL32(x) \
257 (((uint32_t)((const uint8_t*)(x))[3] << 24) | \
258 (((const uint8_t*)(x))[2] << 16) | \
259 (((const uint8_t*)(x))[1] << 8) | \
260 ((const uint8_t*)(x))[0])
263 # define AV_WL32(p, val) do { \
265 ((uint8_t*)(p))[0] = (d); \
266 ((uint8_t*)(p))[1] = (d)>>8; \
267 ((uint8_t*)(p))[2] = (d)>>16; \
268 ((uint8_t*)(p))[3] = (d)>>24; \
273 # define AV_RB64(x) \
274 (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
275 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
276 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
277 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
278 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
279 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
280 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
281 (uint64_t)((const uint8_t*)(x))[7])
284 # define AV_WB64(p, val) do { \
286 ((uint8_t*)(p))[7] = (d); \
287 ((uint8_t*)(p))[6] = (d)>>8; \
288 ((uint8_t*)(p))[5] = (d)>>16; \
289 ((uint8_t*)(p))[4] = (d)>>24; \
290 ((uint8_t*)(p))[3] = (d)>>32; \
291 ((uint8_t*)(p))[2] = (d)>>40; \
292 ((uint8_t*)(p))[1] = (d)>>48; \
293 ((uint8_t*)(p))[0] = (d)>>56; \
298 # define AV_RL64(x) \
299 (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
300 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
301 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
302 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
303 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
304 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
305 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
306 (uint64_t)((const uint8_t*)(x))[0])
309 # define AV_WL64(p, val) do { \
311 ((uint8_t*)(p))[0] = (d); \
312 ((uint8_t*)(p))[1] = (d)>>8; \
313 ((uint8_t*)(p))[2] = (d)>>16; \
314 ((uint8_t*)(p))[3] = (d)>>24; \
315 ((uint8_t*)(p))[4] = (d)>>32; \
316 ((uint8_t*)(p))[5] = (d)>>40; \
317 ((uint8_t*)(p))[6] = (d)>>48; \
318 ((uint8_t*)(p))[7] = (d)>>56; \
322 #if AV_HAVE_BIGENDIAN
323 # define AV_RN(s, p) AV_RB##s(p)
324 # define AV_WN(s, p, v) AV_WB##s(p, v)
326 # define AV_RN(s, p) AV_RL##s(p)
327 # define AV_WN(s, p, v) AV_WL##s(p, v)
330 #endif /* HAVE_FAST_UNALIGNED */
333 # define AV_RN16(p) AV_RN(16, p)
337 # define AV_RN32(p) AV_RN(32, p)
341 # define AV_RN64(p) AV_RN(64, p)
345 # define AV_WN16(p, v) AV_WN(16, p, v)
349 # define AV_WN32(p, v) AV_WN(32, p, v)
353 # define AV_WN64(p, v) AV_WN(64, p, v)
356 #if AV_HAVE_BIGENDIAN
357 # define AV_RB(s, p) AV_RN##s(p)
358 # define AV_WB(s, p, v) AV_WN##s(p, v)
359 # define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
360 # define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
362 # define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
363 # define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
364 # define AV_RL(s, p) AV_RN##s(p)
365 # define AV_WL(s, p, v) AV_WN##s(p, v)
368 #define AV_RB8(x) (((const uint8_t*)(x))[0])
369 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
371 #define AV_RL8(x) AV_RB8(x)
372 #define AV_WL8(p, d) AV_WB8(p, d)
375 # define AV_RB16(p) AV_RB(16, p)
378 # define AV_WB16(p, v) AV_WB(16, p, v)
382 # define AV_RL16(p) AV_RL(16, p)
385 # define AV_WL16(p, v) AV_WL(16, p, v)
389 # define AV_RB32(p) AV_RB(32, p)
392 # define AV_WB32(p, v) AV_WB(32, p, v)
396 # define AV_RL32(p) AV_RL(32, p)
399 # define AV_WL32(p, v) AV_WL(32, p, v)
403 # define AV_RB64(p) AV_RB(64, p)
406 # define AV_WB64(p, v) AV_WB(64, p, v)
410 # define AV_RL64(p) AV_RL(64, p)
413 # define AV_WL64(p, v) AV_WL(64, p, v)
417 # define AV_RB24(x) \
418 ((((const uint8_t*)(x))[0] << 16) | \
419 (((const uint8_t*)(x))[1] << 8) | \
420 ((const uint8_t*)(x))[2])
423 # define AV_WB24(p, d) do { \
424 ((uint8_t*)(p))[2] = (d); \
425 ((uint8_t*)(p))[1] = (d)>>8; \
426 ((uint8_t*)(p))[0] = (d)>>16; \
431 # define AV_RL24(x) \
432 ((((const uint8_t*)(x))[2] << 16) | \
433 (((const uint8_t*)(x))[1] << 8) | \
434 ((const uint8_t*)(x))[0])
437 # define AV_WL24(p, d) do { \
438 ((uint8_t*)(p))[0] = (d); \
439 ((uint8_t*)(p))[1] = (d)>>8; \
440 ((uint8_t*)(p))[2] = (d)>>16; \
445 * The AV_[RW]NA macros access naturally aligned data
446 * in a type-safe way.
449 #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
450 #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
453 # define AV_RN16A(p) AV_RNA(16, p)
457 # define AV_RN32A(p) AV_RNA(32, p)
461 # define AV_RN64A(p) AV_RNA(64, p)
465 # define AV_WN16A(p, v) AV_WNA(16, p, v)
469 # define AV_WN32A(p, v) AV_WNA(32, p, v)
473 # define AV_WN64A(p, v) AV_WNA(64, p, v)
477 * The AV_COPYxxU macros are suitable for copying data to/from unaligned
481 #define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
484 # define AV_COPY16U(d, s) AV_COPYU(16, d, s)
488 # define AV_COPY32U(d, s) AV_COPYU(32, d, s)
492 # define AV_COPY64U(d, s) AV_COPYU(64, d, s)
496 # define AV_COPY128U(d, s) \
499 AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
503 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
504 * naturally aligned. They may be implemented using MMX,
505 * so emms_c() must be called before using any float code
509 #define AV_COPY(n, d, s) \
510 (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
513 # define AV_COPY16(d, s) AV_COPY(16, d, s)
517 # define AV_COPY32(d, s) AV_COPY(32, d, s)
521 # define AV_COPY64(d, s) AV_COPY(64, d, s)
525 # define AV_COPY128(d, s) \
528 AV_COPY64((char*)(d)+8, (char*)(s)+8); \
532 #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
535 # define AV_SWAP64(a, b) AV_SWAP(64, a, b)
538 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
541 # define AV_ZERO16(d) AV_ZERO(16, d)
545 # define AV_ZERO32(d) AV_ZERO(32, d)
549 # define AV_ZERO64(d) AV_ZERO(64, d)
553 # define AV_ZERO128(d) \
556 AV_ZERO64((char*)(d)+8); \
560 #endif /* AVUTIL_INTREADWRITE_H */