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 AV_HAVE_FAST_UNALIGNED
202 # define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
203 # define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
208 # define AV_RB16(x) \
209 ((((const uint8_t*)(x))[0] << 8) | \
210 ((const uint8_t*)(x))[1])
213 # define AV_WB16(p, d) do { \
214 ((uint8_t*)(p))[1] = (d); \
215 ((uint8_t*)(p))[0] = (d)>>8; \
220 # define AV_RL16(x) \
221 ((((const uint8_t*)(x))[1] << 8) | \
222 ((const uint8_t*)(x))[0])
225 # define AV_WL16(p, d) do { \
226 ((uint8_t*)(p))[0] = (d); \
227 ((uint8_t*)(p))[1] = (d)>>8; \
232 # define AV_RB32(x) \
233 (((uint32_t)((const uint8_t*)(x))[0] << 24) | \
234 (((const uint8_t*)(x))[1] << 16) | \
235 (((const uint8_t*)(x))[2] << 8) | \
236 ((const uint8_t*)(x))[3])
239 # define AV_WB32(p, d) do { \
240 ((uint8_t*)(p))[3] = (d); \
241 ((uint8_t*)(p))[2] = (d)>>8; \
242 ((uint8_t*)(p))[1] = (d)>>16; \
243 ((uint8_t*)(p))[0] = (d)>>24; \
248 # define AV_RL32(x) \
249 (((uint32_t)((const uint8_t*)(x))[3] << 24) | \
250 (((const uint8_t*)(x))[2] << 16) | \
251 (((const uint8_t*)(x))[1] << 8) | \
252 ((const uint8_t*)(x))[0])
255 # define AV_WL32(p, d) do { \
256 ((uint8_t*)(p))[0] = (d); \
257 ((uint8_t*)(p))[1] = (d)>>8; \
258 ((uint8_t*)(p))[2] = (d)>>16; \
259 ((uint8_t*)(p))[3] = (d)>>24; \
264 # define AV_RB64(x) \
265 (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
266 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
267 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
268 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
269 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
270 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
271 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
272 (uint64_t)((const uint8_t*)(x))[7])
275 # define AV_WB64(p, d) do { \
276 ((uint8_t*)(p))[7] = (d); \
277 ((uint8_t*)(p))[6] = (d)>>8; \
278 ((uint8_t*)(p))[5] = (d)>>16; \
279 ((uint8_t*)(p))[4] = (d)>>24; \
280 ((uint8_t*)(p))[3] = (d)>>32; \
281 ((uint8_t*)(p))[2] = (d)>>40; \
282 ((uint8_t*)(p))[1] = (d)>>48; \
283 ((uint8_t*)(p))[0] = (d)>>56; \
288 # define AV_RL64(x) \
289 (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
290 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
291 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
292 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
293 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
294 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
295 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
296 (uint64_t)((const uint8_t*)(x))[0])
299 # define AV_WL64(p, d) do { \
300 ((uint8_t*)(p))[0] = (d); \
301 ((uint8_t*)(p))[1] = (d)>>8; \
302 ((uint8_t*)(p))[2] = (d)>>16; \
303 ((uint8_t*)(p))[3] = (d)>>24; \
304 ((uint8_t*)(p))[4] = (d)>>32; \
305 ((uint8_t*)(p))[5] = (d)>>40; \
306 ((uint8_t*)(p))[6] = (d)>>48; \
307 ((uint8_t*)(p))[7] = (d)>>56; \
311 #if AV_HAVE_BIGENDIAN
312 # define AV_RN(s, p) AV_RB##s(p)
313 # define AV_WN(s, p, v) AV_WB##s(p, v)
315 # define AV_RN(s, p) AV_RL##s(p)
316 # define AV_WN(s, p, v) AV_WL##s(p, v)
319 #endif /* HAVE_FAST_UNALIGNED */
322 # define AV_RN16(p) AV_RN(16, p)
326 # define AV_RN32(p) AV_RN(32, p)
330 # define AV_RN64(p) AV_RN(64, p)
334 # define AV_WN16(p, v) AV_WN(16, p, v)
338 # define AV_WN32(p, v) AV_WN(32, p, v)
342 # define AV_WN64(p, v) AV_WN(64, p, v)
345 #if AV_HAVE_BIGENDIAN
346 # define AV_RB(s, p) AV_RN##s(p)
347 # define AV_WB(s, p, v) AV_WN##s(p, v)
348 # define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
349 # define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
351 # define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
352 # define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
353 # define AV_RL(s, p) AV_RN##s(p)
354 # define AV_WL(s, p, v) AV_WN##s(p, v)
357 #define AV_RB8(x) (((const uint8_t*)(x))[0])
358 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
360 #define AV_RL8(x) AV_RB8(x)
361 #define AV_WL8(p, d) AV_WB8(p, d)
364 # define AV_RB16(p) AV_RB(16, p)
367 # define AV_WB16(p, v) AV_WB(16, p, v)
371 # define AV_RL16(p) AV_RL(16, p)
374 # define AV_WL16(p, v) AV_WL(16, p, v)
378 # define AV_RB32(p) AV_RB(32, p)
381 # define AV_WB32(p, v) AV_WB(32, p, v)
385 # define AV_RL32(p) AV_RL(32, p)
388 # define AV_WL32(p, v) AV_WL(32, p, v)
392 # define AV_RB64(p) AV_RB(64, p)
395 # define AV_WB64(p, v) AV_WB(64, p, v)
399 # define AV_RL64(p) AV_RL(64, p)
402 # define AV_WL64(p, v) AV_WL(64, p, v)
406 # define AV_RB24(x) \
407 ((((const uint8_t*)(x))[0] << 16) | \
408 (((const uint8_t*)(x))[1] << 8) | \
409 ((const uint8_t*)(x))[2])
412 # define AV_WB24(p, d) do { \
413 ((uint8_t*)(p))[2] = (d); \
414 ((uint8_t*)(p))[1] = (d)>>8; \
415 ((uint8_t*)(p))[0] = (d)>>16; \
420 # define AV_RL24(x) \
421 ((((const uint8_t*)(x))[2] << 16) | \
422 (((const uint8_t*)(x))[1] << 8) | \
423 ((const uint8_t*)(x))[0])
426 # define AV_WL24(p, d) do { \
427 ((uint8_t*)(p))[0] = (d); \
428 ((uint8_t*)(p))[1] = (d)>>8; \
429 ((uint8_t*)(p))[2] = (d)>>16; \
434 * The AV_[RW]NA macros access naturally aligned data
435 * in a type-safe way.
438 #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
439 #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
442 # define AV_RN16A(p) AV_RNA(16, p)
446 # define AV_RN32A(p) AV_RNA(32, p)
450 # define AV_RN64A(p) AV_RNA(64, p)
454 # define AV_WN16A(p, v) AV_WNA(16, p, v)
458 # define AV_WN32A(p, v) AV_WNA(32, p, v)
462 # define AV_WN64A(p, v) AV_WNA(64, p, v)
466 * The AV_COPYxxU macros are suitable for copying data to/from unaligned
470 #define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
473 # define AV_COPY16U(d, s) AV_COPYU(16, d, s)
477 # define AV_COPY32U(d, s) AV_COPYU(32, d, s)
481 # define AV_COPY64U(d, s) AV_COPYU(64, d, s)
485 # define AV_COPY128U(d, s) \
488 AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
492 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
493 * naturally aligned. They may be implemented using MMX,
494 * so emms_c() must be called before using any float code
498 #define AV_COPY(n, d, s) \
499 (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
502 # define AV_COPY16(d, s) AV_COPY(16, d, s)
506 # define AV_COPY32(d, s) AV_COPY(32, d, s)
510 # define AV_COPY64(d, s) AV_COPY(64, d, s)
514 # define AV_COPY128(d, s) \
517 AV_COPY64((char*)(d)+8, (char*)(s)+8); \
521 #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
524 # define AV_SWAP64(a, b) AV_SWAP(64, a, b)
527 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
530 # define AV_ZERO16(d) AV_ZERO(16, d)
534 # define AV_ZERO32(d) AV_ZERO(32, d)
538 # define AV_ZERO64(d) AV_ZERO(64, d)
542 # define AV_ZERO128(d) \
545 AV_ZERO64((char*)(d)+8); \
549 #endif /* AVUTIL_INTREADWRITE_H */