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comparison lib/libavutil/intreadwrite.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
1 /*
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 #ifndef AVUTIL_INTREADWRITE_H
20 #define AVUTIL_INTREADWRITE_H
21
22 #include <stdint.h>
23 #include "libavutil/avconfig.h"
24 #include "attributes.h"
25 #include "bswap.h"
26
27 typedef union {
28 uint64_t u64;
29 uint32_t u32[2];
30 uint16_t u16[4];
31 uint8_t u8 [8];
32 double f64;
33 float f32[2];
34 } av_alias av_alias64;
35
36 typedef union {
37 uint32_t u32;
38 uint16_t u16[2];
39 uint8_t u8 [4];
40 float f32;
41 } av_alias av_alias32;
42
43 typedef union {
44 uint16_t u16;
45 uint8_t u8 [2];
46 } 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 * Preprocessor symbols must be defined, even if these are implemented
52 * as inline functions.
53 */
54
55 #ifdef HAVE_AV_CONFIG_H
56
57 #include "config.h"
58
59 #if ARCH_ARM
60 # include "arm/intreadwrite.h"
61 #elif ARCH_AVR32
62 # include "avr32/intreadwrite.h"
63 #elif ARCH_MIPS
64 # include "mips/intreadwrite.h"
65 #elif ARCH_PPC
66 # include "ppc/intreadwrite.h"
67 #elif ARCH_TOMI
68 # include "tomi/intreadwrite.h"
69 #elif ARCH_X86
70 # include "x86/intreadwrite.h"
71 #endif
72
73 #endif /* HAVE_AV_CONFIG_H */
74
75 /*
76 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
77 */
78
79 #if AV_HAVE_BIGENDIAN
80
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)
85 # endif
86
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)
91 # endif
92
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)
97 # endif
98
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)
103 # endif
104
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)
109 # endif
110
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)
115 # endif
116
117 # if defined(AV_RN48) && !defined(AV_RB48)
118 # define AV_RB48(p) AV_RN48(p)
119 # elif !defined(AV_RN48) && defined(AV_RB48)
120 # define AV_RN48(p) AV_RB48(p)
121 # endif
122
123 # if defined(AV_WN48) && !defined(AV_WB48)
124 # define AV_WB48(p, v) AV_WN48(p, v)
125 # elif !defined(AV_WN48) && defined(AV_WB48)
126 # define AV_WN48(p, v) AV_WB48(p, v)
127 # endif
128
129 # if defined(AV_RN64) && !defined(AV_RB64)
130 # define AV_RB64(p) AV_RN64(p)
131 # elif !defined(AV_RN64) && defined(AV_RB64)
132 # define AV_RN64(p) AV_RB64(p)
133 # endif
134
135 # if defined(AV_WN64) && !defined(AV_WB64)
136 # define AV_WB64(p, v) AV_WN64(p, v)
137 # elif !defined(AV_WN64) && defined(AV_WB64)
138 # define AV_WN64(p, v) AV_WB64(p, v)
139 # endif
140
141 #else /* AV_HAVE_BIGENDIAN */
142
143 # if defined(AV_RN16) && !defined(AV_RL16)
144 # define AV_RL16(p) AV_RN16(p)
145 # elif !defined(AV_RN16) && defined(AV_RL16)
146 # define AV_RN16(p) AV_RL16(p)
147 # endif
148
149 # if defined(AV_WN16) && !defined(AV_WL16)
150 # define AV_WL16(p, v) AV_WN16(p, v)
151 # elif !defined(AV_WN16) && defined(AV_WL16)
152 # define AV_WN16(p, v) AV_WL16(p, v)
153 # endif
154
155 # if defined(AV_RN24) && !defined(AV_RL24)
156 # define AV_RL24(p) AV_RN24(p)
157 # elif !defined(AV_RN24) && defined(AV_RL24)
158 # define AV_RN24(p) AV_RL24(p)
159 # endif
160
161 # if defined(AV_WN24) && !defined(AV_WL24)
162 # define AV_WL24(p, v) AV_WN24(p, v)
163 # elif !defined(AV_WN24) && defined(AV_WL24)
164 # define AV_WN24(p, v) AV_WL24(p, v)
165 # endif
166
167 # if defined(AV_RN32) && !defined(AV_RL32)
168 # define AV_RL32(p) AV_RN32(p)
169 # elif !defined(AV_RN32) && defined(AV_RL32)
170 # define AV_RN32(p) AV_RL32(p)
171 # endif
172
173 # if defined(AV_WN32) && !defined(AV_WL32)
174 # define AV_WL32(p, v) AV_WN32(p, v)
175 # elif !defined(AV_WN32) && defined(AV_WL32)
176 # define AV_WN32(p, v) AV_WL32(p, v)
177 # endif
178
179 # if defined(AV_RN48) && !defined(AV_RL48)
180 # define AV_RL48(p) AV_RN48(p)
181 # elif !defined(AV_RN48) && defined(AV_RL48)
182 # define AV_RN48(p) AV_RL48(p)
183 # endif
184
185 # if defined(AV_WN48) && !defined(AV_WL48)
186 # define AV_WL48(p, v) AV_WN48(p, v)
187 # elif !defined(AV_WN48) && defined(AV_WL48)
188 # define AV_WN48(p, v) AV_WL48(p, v)
189 # endif
190
191 # if defined(AV_RN64) && !defined(AV_RL64)
192 # define AV_RL64(p) AV_RN64(p)
193 # elif !defined(AV_RN64) && defined(AV_RL64)
194 # define AV_RN64(p) AV_RL64(p)
195 # endif
196
197 # if defined(AV_WN64) && !defined(AV_WL64)
198 # define AV_WL64(p, v) AV_WN64(p, v)
199 # elif !defined(AV_WN64) && defined(AV_WL64)
200 # define AV_WN64(p, v) AV_WL64(p, v)
201 # endif
202
203 #endif /* !AV_HAVE_BIGENDIAN */
204
205 /*
206 * Define AV_[RW]N helper macros to simplify definitions not provided
207 * by per-arch headers.
208 */
209
210 #if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
211
212 union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
213 union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
214 union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
215
216 # define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
217 # define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
218
219 #elif defined(__DECC)
220
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 # define AV_RB16(x) \
233 ((((const uint8_t*)(x))[0] << 8) | \
234 ((const uint8_t*)(x))[1])
235 #endif
236 #ifndef AV_WB16
237 # define AV_WB16(p, darg) do { \
238 unsigned d = (darg); \
239 ((uint8_t*)(p))[1] = (d); \
240 ((uint8_t*)(p))[0] = (d)>>8; \
241 } while(0)
242 #endif
243
244 #ifndef AV_RL16
245 # define AV_RL16(x) \
246 ((((const uint8_t*)(x))[1] << 8) | \
247 ((const uint8_t*)(x))[0])
248 #endif
249 #ifndef AV_WL16
250 # define AV_WL16(p, darg) do { \
251 unsigned d = (darg); \
252 ((uint8_t*)(p))[0] = (d); \
253 ((uint8_t*)(p))[1] = (d)>>8; \
254 } while(0)
255 #endif
256
257 #ifndef AV_RB32
258 # define AV_RB32(x) \
259 (((uint32_t)((const uint8_t*)(x))[0] << 24) | \
260 (((const uint8_t*)(x))[1] << 16) | \
261 (((const uint8_t*)(x))[2] << 8) | \
262 ((const uint8_t*)(x))[3])
263 #endif
264 #ifndef AV_WB32
265 # define AV_WB32(p, darg) do { \
266 unsigned d = (darg); \
267 ((uint8_t*)(p))[3] = (d); \
268 ((uint8_t*)(p))[2] = (d)>>8; \
269 ((uint8_t*)(p))[1] = (d)>>16; \
270 ((uint8_t*)(p))[0] = (d)>>24; \
271 } while(0)
272 #endif
273
274 #ifndef AV_RL32
275 # define AV_RL32(x) \
276 (((uint32_t)((const uint8_t*)(x))[3] << 24) | \
277 (((const uint8_t*)(x))[2] << 16) | \
278 (((const uint8_t*)(x))[1] << 8) | \
279 ((const uint8_t*)(x))[0])
280 #endif
281 #ifndef AV_WL32
282 # define AV_WL32(p, darg) do { \
283 unsigned d = (darg); \
284 ((uint8_t*)(p))[0] = (d); \
285 ((uint8_t*)(p))[1] = (d)>>8; \
286 ((uint8_t*)(p))[2] = (d)>>16; \
287 ((uint8_t*)(p))[3] = (d)>>24; \
288 } while(0)
289 #endif
290
291 #ifndef AV_RB64
292 # define AV_RB64(x) \
293 (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
294 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
295 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
296 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
297 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
298 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
299 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
300 (uint64_t)((const uint8_t*)(x))[7])
301 #endif
302 #ifndef AV_WB64
303 # define AV_WB64(p, darg) do { \
304 uint64_t d = (darg); \
305 ((uint8_t*)(p))[7] = (d); \
306 ((uint8_t*)(p))[6] = (d)>>8; \
307 ((uint8_t*)(p))[5] = (d)>>16; \
308 ((uint8_t*)(p))[4] = (d)>>24; \
309 ((uint8_t*)(p))[3] = (d)>>32; \
310 ((uint8_t*)(p))[2] = (d)>>40; \
311 ((uint8_t*)(p))[1] = (d)>>48; \
312 ((uint8_t*)(p))[0] = (d)>>56; \
313 } while(0)
314 #endif
315
316 #ifndef AV_RL64
317 # define AV_RL64(x) \
318 (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
319 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
320 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
321 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
322 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
323 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
324 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
325 (uint64_t)((const uint8_t*)(x))[0])
326 #endif
327 #ifndef AV_WL64
328 # define AV_WL64(p, darg) do { \
329 uint64_t d = (darg); \
330 ((uint8_t*)(p))[0] = (d); \
331 ((uint8_t*)(p))[1] = (d)>>8; \
332 ((uint8_t*)(p))[2] = (d)>>16; \
333 ((uint8_t*)(p))[3] = (d)>>24; \
334 ((uint8_t*)(p))[4] = (d)>>32; \
335 ((uint8_t*)(p))[5] = (d)>>40; \
336 ((uint8_t*)(p))[6] = (d)>>48; \
337 ((uint8_t*)(p))[7] = (d)>>56; \
338 } while(0)
339 #endif
340
341 #if AV_HAVE_BIGENDIAN
342 # define AV_RN(s, p) AV_RB##s(p)
343 # define AV_WN(s, p, v) AV_WB##s(p, v)
344 #else
345 # define AV_RN(s, p) AV_RL##s(p)
346 # define AV_WN(s, p, v) AV_WL##s(p, v)
347 #endif
348
349 #endif /* HAVE_FAST_UNALIGNED */
350
351 #ifndef AV_RN16
352 # define AV_RN16(p) AV_RN(16, p)
353 #endif
354
355 #ifndef AV_RN32
356 # define AV_RN32(p) AV_RN(32, p)
357 #endif
358
359 #ifndef AV_RN64
360 # define AV_RN64(p) AV_RN(64, p)
361 #endif
362
363 #ifndef AV_WN16
364 # define AV_WN16(p, v) AV_WN(16, p, v)
365 #endif
366
367 #ifndef AV_WN32
368 # define AV_WN32(p, v) AV_WN(32, p, v)
369 #endif
370
371 #ifndef AV_WN64
372 # define AV_WN64(p, v) AV_WN(64, p, v)
373 #endif
374
375 #if AV_HAVE_BIGENDIAN
376 # define AV_RB(s, p) AV_RN##s(p)
377 # define AV_WB(s, p, v) AV_WN##s(p, v)
378 # define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
379 # define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
380 #else
381 # define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
382 # define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
383 # define AV_RL(s, p) AV_RN##s(p)
384 # define AV_WL(s, p, v) AV_WN##s(p, v)
385 #endif
386
387 #define AV_RB8(x) (((const uint8_t*)(x))[0])
388 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
389
390 #define AV_RL8(x) AV_RB8(x)
391 #define AV_WL8(p, d) AV_WB8(p, d)
392
393 #ifndef AV_RB16
394 # define AV_RB16(p) AV_RB(16, p)
395 #endif
396 #ifndef AV_WB16
397 # define AV_WB16(p, v) AV_WB(16, p, v)
398 #endif
399
400 #ifndef AV_RL16
401 # define AV_RL16(p) AV_RL(16, p)
402 #endif
403 #ifndef AV_WL16
404 # define AV_WL16(p, v) AV_WL(16, p, v)
405 #endif
406
407 #ifndef AV_RB32
408 # define AV_RB32(p) AV_RB(32, p)
409 #endif
410 #ifndef AV_WB32
411 # define AV_WB32(p, v) AV_WB(32, p, v)
412 #endif
413
414 #ifndef AV_RL32
415 # define AV_RL32(p) AV_RL(32, p)
416 #endif
417 #ifndef AV_WL32
418 # define AV_WL32(p, v) AV_WL(32, p, v)
419 #endif
420
421 #ifndef AV_RB64
422 # define AV_RB64(p) AV_RB(64, p)
423 #endif
424 #ifndef AV_WB64
425 # define AV_WB64(p, v) AV_WB(64, p, v)
426 #endif
427
428 #ifndef AV_RL64
429 # define AV_RL64(p) AV_RL(64, p)
430 #endif
431 #ifndef AV_WL64
432 # define AV_WL64(p, v) AV_WL(64, p, v)
433 #endif
434
435 #ifndef AV_RB24
436 # define AV_RB24(x) \
437 ((((const uint8_t*)(x))[0] << 16) | \
438 (((const uint8_t*)(x))[1] << 8) | \
439 ((const uint8_t*)(x))[2])
440 #endif
441 #ifndef AV_WB24
442 # define AV_WB24(p, d) do { \
443 ((uint8_t*)(p))[2] = (d); \
444 ((uint8_t*)(p))[1] = (d)>>8; \
445 ((uint8_t*)(p))[0] = (d)>>16; \
446 } while(0)
447 #endif
448
449 #ifndef AV_RL24
450 # define AV_RL24(x) \
451 ((((const uint8_t*)(x))[2] << 16) | \
452 (((const uint8_t*)(x))[1] << 8) | \
453 ((const uint8_t*)(x))[0])
454 #endif
455 #ifndef AV_WL24
456 # define AV_WL24(p, d) do { \
457 ((uint8_t*)(p))[0] = (d); \
458 ((uint8_t*)(p))[1] = (d)>>8; \
459 ((uint8_t*)(p))[2] = (d)>>16; \
460 } while(0)
461 #endif
462
463 #ifndef AV_RB48
464 # define AV_RB48(x) \
465 (((uint64_t)((const uint8_t*)(x))[0] << 40) | \
466 ((uint64_t)((const uint8_t*)(x))[1] << 32) | \
467 ((uint64_t)((const uint8_t*)(x))[2] << 24) | \
468 ((uint64_t)((const uint8_t*)(x))[3] << 16) | \
469 ((uint64_t)((const uint8_t*)(x))[4] << 8) | \
470 (uint64_t)((const uint8_t*)(x))[5])
471 #endif
472 #ifndef AV_WB48
473 # define AV_WB48(p, darg) do { \
474 uint64_t d = (darg); \
475 ((uint8_t*)(p))[5] = (d); \
476 ((uint8_t*)(p))[4] = (d)>>8; \
477 ((uint8_t*)(p))[3] = (d)>>16; \
478 ((uint8_t*)(p))[2] = (d)>>24; \
479 ((uint8_t*)(p))[1] = (d)>>32; \
480 ((uint8_t*)(p))[0] = (d)>>40; \
481 } while(0)
482 #endif
483
484 #ifndef AV_RL48
485 # define AV_RL48(x) \
486 (((uint64_t)((const uint8_t*)(x))[5] << 40) | \
487 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
488 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
489 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
490 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
491 (uint64_t)((const uint8_t*)(x))[0])
492 #endif
493 #ifndef AV_WL48
494 # define AV_WL48(p, darg) do { \
495 uint64_t d = (darg); \
496 ((uint8_t*)(p))[0] = (d); \
497 ((uint8_t*)(p))[1] = (d)>>8; \
498 ((uint8_t*)(p))[2] = (d)>>16; \
499 ((uint8_t*)(p))[3] = (d)>>24; \
500 ((uint8_t*)(p))[4] = (d)>>32; \
501 ((uint8_t*)(p))[5] = (d)>>40; \
502 } while(0)
503 #endif
504
505 /*
506 * The AV_[RW]NA macros access naturally aligned data
507 * in a type-safe way.
508 */
509
510 #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
511 #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
512
513 #ifndef AV_RN16A
514 # define AV_RN16A(p) AV_RNA(16, p)
515 #endif
516
517 #ifndef AV_RN32A
518 # define AV_RN32A(p) AV_RNA(32, p)
519 #endif
520
521 #ifndef AV_RN64A
522 # define AV_RN64A(p) AV_RNA(64, p)
523 #endif
524
525 #ifndef AV_WN16A
526 # define AV_WN16A(p, v) AV_WNA(16, p, v)
527 #endif
528
529 #ifndef AV_WN32A
530 # define AV_WN32A(p, v) AV_WNA(32, p, v)
531 #endif
532
533 #ifndef AV_WN64A
534 # define AV_WN64A(p, v) AV_WNA(64, p, v)
535 #endif
536
537 /*
538 * The AV_COPYxxU macros are suitable for copying data to/from unaligned
539 * memory locations.
540 */
541
542 #define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
543
544 #ifndef AV_COPY16U
545 # define AV_COPY16U(d, s) AV_COPYU(16, d, s)
546 #endif
547
548 #ifndef AV_COPY32U
549 # define AV_COPY32U(d, s) AV_COPYU(32, d, s)
550 #endif
551
552 #ifndef AV_COPY64U
553 # define AV_COPY64U(d, s) AV_COPYU(64, d, s)
554 #endif
555
556 #ifndef AV_COPY128U
557 # define AV_COPY128U(d, s) \
558 do { \
559 AV_COPY64U(d, s); \
560 AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
561 } while(0)
562 #endif
563
564 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
565 * naturally aligned. They may be implemented using MMX,
566 * so emms_c() must be called before using any float code
567 * afterwards.
568 */
569
570 #define AV_COPY(n, d, s) \
571 (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
572
573 #ifndef AV_COPY16
574 # define AV_COPY16(d, s) AV_COPY(16, d, s)
575 #endif
576
577 #ifndef AV_COPY32
578 # define AV_COPY32(d, s) AV_COPY(32, d, s)
579 #endif
580
581 #ifndef AV_COPY64
582 # define AV_COPY64(d, s) AV_COPY(64, d, s)
583 #endif
584
585 #ifndef AV_COPY128
586 # define AV_COPY128(d, s) \
587 do { \
588 AV_COPY64(d, s); \
589 AV_COPY64((char*)(d)+8, (char*)(s)+8); \
590 } while(0)
591 #endif
592
593 #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
594
595 #ifndef AV_SWAP64
596 # define AV_SWAP64(a, b) AV_SWAP(64, a, b)
597 #endif
598
599 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
600
601 #ifndef AV_ZERO16
602 # define AV_ZERO16(d) AV_ZERO(16, d)
603 #endif
604
605 #ifndef AV_ZERO32
606 # define AV_ZERO32(d) AV_ZERO(32, d)
607 #endif
608
609 #ifndef AV_ZERO64
610 # define AV_ZERO64(d) AV_ZERO(64, d)
611 #endif
612
613 #ifndef AV_ZERO128
614 # define AV_ZERO128(d) \
615 do { \
616 AV_ZERO64(d); \
617 AV_ZERO64((char*)(d)+8); \
618 } while(0)
619 #endif
620
621 #endif /* AVUTIL_INTREADWRITE_H */