intreadwrite.h 17.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

19 20
#ifndef AVUTIL_INTREADWRITE_H
#define AVUTIL_INTREADWRITE_H
21

22
#include <stdint.h>
23
#include "libavutil/avconfig.h"
24
#include "attributes.h"
25
#include "bswap.h"
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

typedef union {
    uint64_t u64;
    uint32_t u32[2];
    uint16_t u16[4];
    uint8_t  u8 [8];
    double   f64;
    float    f32[2];
} av_alias av_alias64;

typedef union {
    uint32_t u32;
    uint16_t u16[2];
    uint8_t  u8 [4];
    float    f32;
} av_alias av_alias32;

typedef union {
    uint16_t u16;
    uint8_t  u8 [2];
} av_alias av_alias16;
47

48 49
/*
 * Arch-specific headers can provide any combination of
50
 * AV_[RW][BLN](16|24|32|48|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.
51 52
 * Preprocessor symbols must be defined, even if these are implemented
 * as inline functions.
53 54
 */

55 56 57 58
#ifdef HAVE_AV_CONFIG_H

#include "config.h"

Måns Rullgård's avatar
Måns Rullgård committed
59 60
#if   ARCH_ARM
#   include "arm/intreadwrite.h"
61 62
#elif ARCH_AVR32
#   include "avr32/intreadwrite.h"
63 64
#elif ARCH_MIPS
#   include "mips/intreadwrite.h"
Måns Rullgård's avatar
Måns Rullgård committed
65 66
#elif ARCH_PPC
#   include "ppc/intreadwrite.h"
67 68
#elif ARCH_TOMI
#   include "tomi/intreadwrite.h"
69 70
#elif ARCH_X86
#   include "x86/intreadwrite.h"
Måns Rullgård's avatar
Måns Rullgård committed
71
#endif
72

73 74
#endif /* HAVE_AV_CONFIG_H */

75 76 77 78
/*
 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
 */

79
#if AV_HAVE_BIGENDIAN
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104

#   if    defined(AV_RN16) && !defined(AV_RB16)
#       define AV_RB16(p) AV_RN16(p)
#   elif !defined(AV_RN16) &&  defined(AV_RB16)
#       define AV_RN16(p) AV_RB16(p)
#   endif

#   if    defined(AV_WN16) && !defined(AV_WB16)
#       define AV_WB16(p, v) AV_WN16(p, v)
#   elif !defined(AV_WN16) &&  defined(AV_WB16)
#       define AV_WN16(p, v) AV_WB16(p, v)
#   endif

#   if    defined(AV_RN24) && !defined(AV_RB24)
#       define AV_RB24(p) AV_RN24(p)
#   elif !defined(AV_RN24) &&  defined(AV_RB24)
#       define AV_RN24(p) AV_RB24(p)
#   endif

#   if    defined(AV_WN24) && !defined(AV_WB24)
#       define AV_WB24(p, v) AV_WN24(p, v)
#   elif !defined(AV_WN24) &&  defined(AV_WB24)
#       define AV_WN24(p, v) AV_WB24(p, v)
#   endif

105 106 107 108 109 110
#   if    defined(AV_RN32) && !defined(AV_RB32)
#       define AV_RB32(p) AV_RN32(p)
#   elif !defined(AV_RN32) &&  defined(AV_RB32)
#       define AV_RN32(p) AV_RB32(p)
#   endif

111 112 113 114 115 116
#   if    defined(AV_WN32) && !defined(AV_WB32)
#       define AV_WB32(p, v) AV_WN32(p, v)
#   elif !defined(AV_WN32) &&  defined(AV_WB32)
#       define AV_WN32(p, v) AV_WB32(p, v)
#   endif

117 118 119 120 121 122 123 124 125 126 127 128
#   if    defined(AV_RN48) && !defined(AV_RB48)
#       define AV_RB48(p) AV_RN48(p)
#   elif !defined(AV_RN48) &&  defined(AV_RB48)
#       define AV_RN48(p) AV_RB48(p)
#   endif

#   if    defined(AV_WN48) && !defined(AV_WB48)
#       define AV_WB48(p, v) AV_WN48(p, v)
#   elif !defined(AV_WN48) &&  defined(AV_WB48)
#       define AV_WN48(p, v) AV_WB48(p, v)
#   endif

129 130 131 132 133 134 135 136 137 138 139 140
#   if    defined(AV_RN64) && !defined(AV_RB64)
#       define AV_RB64(p) AV_RN64(p)
#   elif !defined(AV_RN64) &&  defined(AV_RB64)
#       define AV_RN64(p) AV_RB64(p)
#   endif

#   if    defined(AV_WN64) && !defined(AV_WB64)
#       define AV_WB64(p, v) AV_WN64(p, v)
#   elif !defined(AV_WN64) &&  defined(AV_WB64)
#       define AV_WN64(p, v) AV_WB64(p, v)
#   endif

141
#else /* AV_HAVE_BIGENDIAN */
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166

#   if    defined(AV_RN16) && !defined(AV_RL16)
#       define AV_RL16(p) AV_RN16(p)
#   elif !defined(AV_RN16) &&  defined(AV_RL16)
#       define AV_RN16(p) AV_RL16(p)
#   endif

#   if    defined(AV_WN16) && !defined(AV_WL16)
#       define AV_WL16(p, v) AV_WN16(p, v)
#   elif !defined(AV_WN16) &&  defined(AV_WL16)
#       define AV_WN16(p, v) AV_WL16(p, v)
#   endif

#   if    defined(AV_RN24) && !defined(AV_RL24)
#       define AV_RL24(p) AV_RN24(p)
#   elif !defined(AV_RN24) &&  defined(AV_RL24)
#       define AV_RN24(p) AV_RL24(p)
#   endif

#   if    defined(AV_WN24) && !defined(AV_WL24)
#       define AV_WL24(p, v) AV_WN24(p, v)
#   elif !defined(AV_WN24) &&  defined(AV_WL24)
#       define AV_WN24(p, v) AV_WL24(p, v)
#   endif

167 168 169 170 171 172
#   if    defined(AV_RN32) && !defined(AV_RL32)
#       define AV_RL32(p) AV_RN32(p)
#   elif !defined(AV_RN32) &&  defined(AV_RL32)
#       define AV_RN32(p) AV_RL32(p)
#   endif

173 174 175 176 177 178
#   if    defined(AV_WN32) && !defined(AV_WL32)
#       define AV_WL32(p, v) AV_WN32(p, v)
#   elif !defined(AV_WN32) &&  defined(AV_WL32)
#       define AV_WN32(p, v) AV_WL32(p, v)
#   endif

179 180 181 182 183 184 185 186 187 188 189 190
#   if    defined(AV_RN48) && !defined(AV_RL48)
#       define AV_RL48(p) AV_RN48(p)
#   elif !defined(AV_RN48) &&  defined(AV_RL48)
#       define AV_RN48(p) AV_RL48(p)
#   endif

#   if    defined(AV_WN48) && !defined(AV_WL48)
#       define AV_WL48(p, v) AV_WN48(p, v)
#   elif !defined(AV_WN48) &&  defined(AV_WL48)
#       define AV_WN48(p, v) AV_WL48(p, v)
#   endif

191 192 193 194 195 196 197 198 199 200 201 202
#   if    defined(AV_RN64) && !defined(AV_RL64)
#       define AV_RL64(p) AV_RN64(p)
#   elif !defined(AV_RN64) &&  defined(AV_RL64)
#       define AV_RN64(p) AV_RL64(p)
#   endif

#   if    defined(AV_WN64) && !defined(AV_WL64)
#       define AV_WL64(p, v) AV_WN64(p, v)
#   elif !defined(AV_WN64) &&  defined(AV_WL64)
#       define AV_WN64(p, v) AV_WL64(p, v)
#   endif

203
#endif /* !AV_HAVE_BIGENDIAN */
204

205 206 207 208 209
/*
 * Define AV_[RW]N helper macros to simplify definitions not provided
 * by per-arch headers.
 */

210
#if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
211

212 213 214
union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
215

216 217
#   define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
#   define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
218

219 220
#elif defined(__DECC)

221
#   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
222
#   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
223

224
#elif AV_HAVE_FAST_UNALIGNED
225

226
#   define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
227
#   define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
228

229
#else
230

231
#ifndef AV_RB16
232 233 234
#   define AV_RB16(x)                           \
    ((((const uint8_t*)(x))[0] << 8) |          \
      ((const uint8_t*)(x))[1])
235 236
#endif
#ifndef AV_WB16
237 238
#   define AV_WB16(p, darg) do {                \
        unsigned d = (darg);                    \
239 240 241
        ((uint8_t*)(p))[1] = (d);               \
        ((uint8_t*)(p))[0] = (d)>>8;            \
    } while(0)
242
#endif
243

244
#ifndef AV_RL16
245 246 247
#   define AV_RL16(x)                           \
    ((((const uint8_t*)(x))[1] << 8) |          \
      ((const uint8_t*)(x))[0])
248 249
#endif
#ifndef AV_WL16
250 251
#   define AV_WL16(p, darg) do {                \
        unsigned d = (darg);                    \
252 253 254
        ((uint8_t*)(p))[0] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
    } while(0)
255
#endif
256

257
#ifndef AV_RB32
258 259 260 261 262
#   define AV_RB32(x)                                \
    (((uint32_t)((const uint8_t*)(x))[0] << 24) |    \
               (((const uint8_t*)(x))[1] << 16) |    \
               (((const uint8_t*)(x))[2] <<  8) |    \
                ((const uint8_t*)(x))[3])
263 264
#endif
#ifndef AV_WB32
265 266
#   define AV_WB32(p, darg) do {                \
        unsigned d = (darg);                    \
267 268 269 270 271
        ((uint8_t*)(p))[3] = (d);               \
        ((uint8_t*)(p))[2] = (d)>>8;            \
        ((uint8_t*)(p))[1] = (d)>>16;           \
        ((uint8_t*)(p))[0] = (d)>>24;           \
    } while(0)
272
#endif
273

274
#ifndef AV_RL32
275 276 277 278 279
#   define AV_RL32(x)                                \
    (((uint32_t)((const uint8_t*)(x))[3] << 24) |    \
               (((const uint8_t*)(x))[2] << 16) |    \
               (((const uint8_t*)(x))[1] <<  8) |    \
                ((const uint8_t*)(x))[0])
280 281
#endif
#ifndef AV_WL32
282 283
#   define AV_WL32(p, darg) do {                \
        unsigned d = (darg);                    \
284 285 286 287 288
        ((uint8_t*)(p))[0] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
        ((uint8_t*)(p))[2] = (d)>>16;           \
        ((uint8_t*)(p))[3] = (d)>>24;           \
    } while(0)
289
#endif
290

291
#ifndef AV_RB64
292 293 294 295 296 297 298 299 300
#   define AV_RB64(x)                                   \
    (((uint64_t)((const uint8_t*)(x))[0] << 56) |       \
     ((uint64_t)((const uint8_t*)(x))[1] << 48) |       \
     ((uint64_t)((const uint8_t*)(x))[2] << 40) |       \
     ((uint64_t)((const uint8_t*)(x))[3] << 32) |       \
     ((uint64_t)((const uint8_t*)(x))[4] << 24) |       \
     ((uint64_t)((const uint8_t*)(x))[5] << 16) |       \
     ((uint64_t)((const uint8_t*)(x))[6] <<  8) |       \
      (uint64_t)((const uint8_t*)(x))[7])
301 302
#endif
#ifndef AV_WB64
303 304
#   define AV_WB64(p, darg) do {                \
        uint64_t d = (darg);                    \
305 306 307 308 309 310 311 312 313
        ((uint8_t*)(p))[7] = (d);               \
        ((uint8_t*)(p))[6] = (d)>>8;            \
        ((uint8_t*)(p))[5] = (d)>>16;           \
        ((uint8_t*)(p))[4] = (d)>>24;           \
        ((uint8_t*)(p))[3] = (d)>>32;           \
        ((uint8_t*)(p))[2] = (d)>>40;           \
        ((uint8_t*)(p))[1] = (d)>>48;           \
        ((uint8_t*)(p))[0] = (d)>>56;           \
    } while(0)
314
#endif
315

316
#ifndef AV_RL64
317 318 319 320 321 322 323 324 325
#   define AV_RL64(x)                                   \
    (((uint64_t)((const uint8_t*)(x))[7] << 56) |       \
     ((uint64_t)((const uint8_t*)(x))[6] << 48) |       \
     ((uint64_t)((const uint8_t*)(x))[5] << 40) |       \
     ((uint64_t)((const uint8_t*)(x))[4] << 32) |       \
     ((uint64_t)((const uint8_t*)(x))[3] << 24) |       \
     ((uint64_t)((const uint8_t*)(x))[2] << 16) |       \
     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |       \
      (uint64_t)((const uint8_t*)(x))[0])
326 327
#endif
#ifndef AV_WL64
328 329
#   define AV_WL64(p, darg) do {                \
        uint64_t d = (darg);                    \
330 331 332 333 334 335 336 337 338
        ((uint8_t*)(p))[0] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
        ((uint8_t*)(p))[2] = (d)>>16;           \
        ((uint8_t*)(p))[3] = (d)>>24;           \
        ((uint8_t*)(p))[4] = (d)>>32;           \
        ((uint8_t*)(p))[5] = (d)>>40;           \
        ((uint8_t*)(p))[6] = (d)>>48;           \
        ((uint8_t*)(p))[7] = (d)>>56;           \
    } while(0)
339 340
#endif

341
#if AV_HAVE_BIGENDIAN
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374
#   define AV_RN(s, p)    AV_RB##s(p)
#   define AV_WN(s, p, v) AV_WB##s(p, v)
#else
#   define AV_RN(s, p)    AV_RL##s(p)
#   define AV_WN(s, p, v) AV_WL##s(p, v)
#endif

#endif /* HAVE_FAST_UNALIGNED */

#ifndef AV_RN16
#   define AV_RN16(p) AV_RN(16, p)
#endif

#ifndef AV_RN32
#   define AV_RN32(p) AV_RN(32, p)
#endif

#ifndef AV_RN64
#   define AV_RN64(p) AV_RN(64, p)
#endif

#ifndef AV_WN16
#   define AV_WN16(p, v) AV_WN(16, p, v)
#endif

#ifndef AV_WN32
#   define AV_WN32(p, v) AV_WN(32, p, v)
#endif

#ifndef AV_WN64
#   define AV_WN64(p, v) AV_WN(64, p, v)
#endif

375
#if AV_HAVE_BIGENDIAN
376 377
#   define AV_RB(s, p)    AV_RN##s(p)
#   define AV_WB(s, p, v) AV_WN##s(p, v)
378 379
#   define AV_RL(s, p)    av_bswap##s(AV_RN##s(p))
#   define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
380
#else
381 382
#   define AV_RB(s, p)    av_bswap##s(AV_RN##s(p))
#   define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
383 384
#   define AV_RL(s, p)    AV_RN##s(p)
#   define AV_WL(s, p, v) AV_WN##s(p, v)
385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433
#endif

#define AV_RB8(x)     (((const uint8_t*)(x))[0])
#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)

#define AV_RL8(x)     AV_RB8(x)
#define AV_WL8(p, d)  AV_WB8(p, d)

#ifndef AV_RB16
#   define AV_RB16(p)    AV_RB(16, p)
#endif
#ifndef AV_WB16
#   define AV_WB16(p, v) AV_WB(16, p, v)
#endif

#ifndef AV_RL16
#   define AV_RL16(p)    AV_RL(16, p)
#endif
#ifndef AV_WL16
#   define AV_WL16(p, v) AV_WL(16, p, v)
#endif

#ifndef AV_RB32
#   define AV_RB32(p)    AV_RB(32, p)
#endif
#ifndef AV_WB32
#   define AV_WB32(p, v) AV_WB(32, p, v)
#endif

#ifndef AV_RL32
#   define AV_RL32(p)    AV_RL(32, p)
#endif
#ifndef AV_WL32
#   define AV_WL32(p, v) AV_WL(32, p, v)
#endif

#ifndef AV_RB64
#   define AV_RB64(p)    AV_RB(64, p)
#endif
#ifndef AV_WB64
#   define AV_WB64(p, v) AV_WB(64, p, v)
#endif

#ifndef AV_RL64
#   define AV_RL64(p)    AV_RL(64, p)
#endif
#ifndef AV_WL64
#   define AV_WL64(p, v) AV_WL(64, p, v)
#endif
434

435
#ifndef AV_RB24
436 437 438 439
#   define AV_RB24(x)                           \
    ((((const uint8_t*)(x))[0] << 16) |         \
     (((const uint8_t*)(x))[1] <<  8) |         \
      ((const uint8_t*)(x))[2])
440 441
#endif
#ifndef AV_WB24
442 443 444 445 446
#   define AV_WB24(p, d) do {                   \
        ((uint8_t*)(p))[2] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
        ((uint8_t*)(p))[0] = (d)>>16;           \
    } while(0)
447
#endif
448

449
#ifndef AV_RL24
450 451 452 453
#   define AV_RL24(x)                           \
    ((((const uint8_t*)(x))[2] << 16) |         \
     (((const uint8_t*)(x))[1] <<  8) |         \
      ((const uint8_t*)(x))[0])
454 455
#endif
#ifndef AV_WL24
456 457 458 459 460
#   define AV_WL24(p, d) do {                   \
        ((uint8_t*)(p))[0] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
        ((uint8_t*)(p))[2] = (d)>>16;           \
    } while(0)
461
#endif
462

463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
#ifndef AV_RB48
#   define AV_RB48(x)                                     \
    (((uint64_t)((const uint8_t*)(x))[0] << 40) |         \
     ((uint64_t)((const uint8_t*)(x))[1] << 32) |         \
     ((uint64_t)((const uint8_t*)(x))[2] << 24) |         \
     ((uint64_t)((const uint8_t*)(x))[3] << 16) |         \
     ((uint64_t)((const uint8_t*)(x))[4] <<  8) |         \
      (uint64_t)((const uint8_t*)(x))[5])
#endif
#ifndef AV_WB48
#   define AV_WB48(p, darg) do {                \
        uint64_t d = (darg);                    \
        ((uint8_t*)(p))[5] = (d);               \
        ((uint8_t*)(p))[4] = (d)>>8;            \
        ((uint8_t*)(p))[3] = (d)>>16;           \
        ((uint8_t*)(p))[2] = (d)>>24;           \
        ((uint8_t*)(p))[1] = (d)>>32;           \
        ((uint8_t*)(p))[0] = (d)>>40;           \
    } while(0)
#endif

#ifndef AV_RL48
#   define AV_RL48(x)                                     \
    (((uint64_t)((const uint8_t*)(x))[5] << 40) |         \
     ((uint64_t)((const uint8_t*)(x))[4] << 32) |         \
     ((uint64_t)((const uint8_t*)(x))[3] << 24) |         \
     ((uint64_t)((const uint8_t*)(x))[2] << 16) |         \
     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |         \
      (uint64_t)((const uint8_t*)(x))[0])
#endif
#ifndef AV_WL48
#   define AV_WL48(p, darg) do {                \
        uint64_t d = (darg);                    \
        ((uint8_t*)(p))[0] = (d);               \
        ((uint8_t*)(p))[1] = (d)>>8;            \
        ((uint8_t*)(p))[2] = (d)>>16;           \
        ((uint8_t*)(p))[3] = (d)>>24;           \
        ((uint8_t*)(p))[4] = (d)>>32;           \
        ((uint8_t*)(p))[5] = (d)>>40;           \
    } while(0)
#endif

505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
/*
 * The AV_[RW]NA macros access naturally aligned data
 * in a type-safe way.
 */

#define AV_RNA(s, p)    (((const av_alias##s*)(p))->u##s)
#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))

#ifndef AV_RN16A
#   define AV_RN16A(p) AV_RNA(16, p)
#endif

#ifndef AV_RN32A
#   define AV_RN32A(p) AV_RNA(32, p)
#endif

#ifndef AV_RN64A
#   define AV_RN64A(p) AV_RNA(64, p)
#endif

#ifndef AV_WN16A
#   define AV_WN16A(p, v) AV_WNA(16, p, v)
#endif

#ifndef AV_WN32A
#   define AV_WN32A(p, v) AV_WNA(32, p, v)
#endif

#ifndef AV_WN64A
#   define AV_WN64A(p, v) AV_WNA(64, p, v)
#endif

537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563
/*
 * The AV_COPYxxU macros are suitable for copying data to/from unaligned
 * memory locations.
 */

#define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));

#ifndef AV_COPY16U
#   define AV_COPY16U(d, s) AV_COPYU(16, d, s)
#endif

#ifndef AV_COPY32U
#   define AV_COPY32U(d, s) AV_COPYU(32, d, s)
#endif

#ifndef AV_COPY64U
#   define AV_COPY64U(d, s) AV_COPYU(64, d, s)
#endif

#ifndef AV_COPY128U
#   define AV_COPY128U(d, s)                                    \
    do {                                                        \
        AV_COPY64U(d, s);                                       \
        AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8);     \
    } while(0)
#endif

564 565 566 567 568 569
/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
 * naturally aligned. They may be implemented using MMX,
 * so emms_c() must be called before using any float code
 * afterwards.
 */

570 571
#define AV_COPY(n, d, s) \
    (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
572

573 574 575 576
#ifndef AV_COPY16
#   define AV_COPY16(d, s) AV_COPY(16, d, s)
#endif

Måns Rullgård's avatar
Måns Rullgård committed
577 578 579 580
#ifndef AV_COPY32
#   define AV_COPY32(d, s) AV_COPY(32, d, s)
#endif

581 582 583 584 585 586 587 588 589 590 591 592
#ifndef AV_COPY64
#   define AV_COPY64(d, s) AV_COPY(64, d, s)
#endif

#ifndef AV_COPY128
#   define AV_COPY128(d, s)                    \
    do {                                       \
        AV_COPY64(d, s);                       \
        AV_COPY64((char*)(d)+8, (char*)(s)+8); \
    } while(0)
#endif

593
#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
594 595 596 597 598

#ifndef AV_SWAP64
#   define AV_SWAP64(a, b) AV_SWAP(64, a, b)
#endif

599 600
#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)

601 602 603 604
#ifndef AV_ZERO16
#   define AV_ZERO16(d) AV_ZERO(16, d)
#endif

605 606 607
#ifndef AV_ZERO32
#   define AV_ZERO32(d) AV_ZERO(32, d)
#endif
608 609 610 611 612 613 614 615 616 617 618 619 620

#ifndef AV_ZERO64
#   define AV_ZERO64(d) AV_ZERO(64, d)
#endif

#ifndef AV_ZERO128
#   define AV_ZERO128(d)         \
    do {                         \
        AV_ZERO64(d);            \
        AV_ZERO64((char*)(d)+8); \
    } while(0)
#endif

621
#endif /* AVUTIL_INTREADWRITE_H */