FFmpeg 9.0.2
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intreadwrite.h
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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
27typedef 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
36typedef union {
37 uint32_t u32;
38 uint16_t u16[2];
39 uint8_t u8 [4];
40 float f32;
41} av_alias av_alias32;
42
43typedef 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 * R/W means read/write, B/L/N means big/little/native endianness.
55 * The following macros require aligned access, compared to their
56 * unaligned variants: AV_(COPY|SWAP|ZERO)(64|128), AV_[RW]N[8-64]A.
57 * Incorrect usage may range from abysmal performance to crash
58 * depending on the platform.
59 *
60 * The unaligned variants are AV_[RW][BLN][8-64] and AV_COPY*U.
61 */
62
63#ifdef HAVE_AV_CONFIG_H
64
65#include "config.h"
66
67#if ARCH_AARCH64
68# include "aarch64/intreadwrite.h"
69#elif ARCH_MIPS
70# include "mips/intreadwrite.h"
71#elif ARCH_PPC
72# include "ppc/intreadwrite.h"
73#elif ARCH_X86
74# include "x86/intreadwrite.h"
75#endif
76
77#endif /* HAVE_AV_CONFIG_H */
78
79/*
80 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
81 */
82
83#if AV_HAVE_BIGENDIAN
84
85# if defined(AV_RN16) && !defined(AV_RB16)
86# define AV_RB16(p) AV_RN16(p)
87# elif !defined(AV_RN16) && defined(AV_RB16)
88# define AV_RN16(p) AV_RB16(p)
89# endif
90
91# if defined(AV_WN16) && !defined(AV_WB16)
92# define AV_WB16(p, v) AV_WN16(p, v)
93# elif !defined(AV_WN16) && defined(AV_WB16)
94# define AV_WN16(p, v) AV_WB16(p, v)
95# endif
96
97# if defined(AV_RN24) && !defined(AV_RB24)
98# define AV_RB24(p) AV_RN24(p)
99# elif !defined(AV_RN24) && defined(AV_RB24)
100# define AV_RN24(p) AV_RB24(p)
101# endif
102
103# if defined(AV_WN24) && !defined(AV_WB24)
104# define AV_WB24(p, v) AV_WN24(p, v)
105# elif !defined(AV_WN24) && defined(AV_WB24)
106# define AV_WN24(p, v) AV_WB24(p, v)
107# endif
108
109# if defined(AV_RN32) && !defined(AV_RB32)
110# define AV_RB32(p) AV_RN32(p)
111# elif !defined(AV_RN32) && defined(AV_RB32)
112# define AV_RN32(p) AV_RB32(p)
113# endif
114
115# if defined(AV_WN32) && !defined(AV_WB32)
116# define AV_WB32(p, v) AV_WN32(p, v)
117# elif !defined(AV_WN32) && defined(AV_WB32)
118# define AV_WN32(p, v) AV_WB32(p, v)
119# endif
120
121# if defined(AV_RN48) && !defined(AV_RB48)
122# define AV_RB48(p) AV_RN48(p)
123# elif !defined(AV_RN48) && defined(AV_RB48)
124# define AV_RN48(p) AV_RB48(p)
125# endif
126
127# if defined(AV_WN48) && !defined(AV_WB48)
128# define AV_WB48(p, v) AV_WN48(p, v)
129# elif !defined(AV_WN48) && defined(AV_WB48)
130# define AV_WN48(p, v) AV_WB48(p, v)
131# endif
132
133# if defined(AV_RN64) && !defined(AV_RB64)
134# define AV_RB64(p) AV_RN64(p)
135# elif !defined(AV_RN64) && defined(AV_RB64)
136# define AV_RN64(p) AV_RB64(p)
137# endif
138
139# if defined(AV_WN64) && !defined(AV_WB64)
140# define AV_WB64(p, v) AV_WN64(p, v)
141# elif !defined(AV_WN64) && defined(AV_WB64)
142# define AV_WN64(p, v) AV_WB64(p, v)
143# endif
144
145#else /* AV_HAVE_BIGENDIAN */
146
147# if defined(AV_RN16) && !defined(AV_RL16)
148# define AV_RL16(p) AV_RN16(p)
149# elif !defined(AV_RN16) && defined(AV_RL16)
150# define AV_RN16(p) AV_RL16(p)
151# endif
152
153# if defined(AV_WN16) && !defined(AV_WL16)
154# define AV_WL16(p, v) AV_WN16(p, v)
155# elif !defined(AV_WN16) && defined(AV_WL16)
156# define AV_WN16(p, v) AV_WL16(p, v)
157# endif
158
159# if defined(AV_RN24) && !defined(AV_RL24)
160# define AV_RL24(p) AV_RN24(p)
161# elif !defined(AV_RN24) && defined(AV_RL24)
162# define AV_RN24(p) AV_RL24(p)
163# endif
164
165# if defined(AV_WN24) && !defined(AV_WL24)
166# define AV_WL24(p, v) AV_WN24(p, v)
167# elif !defined(AV_WN24) && defined(AV_WL24)
168# define AV_WN24(p, v) AV_WL24(p, v)
169# endif
170
171# if defined(AV_RN32) && !defined(AV_RL32)
172# define AV_RL32(p) AV_RN32(p)
173# elif !defined(AV_RN32) && defined(AV_RL32)
174# define AV_RN32(p) AV_RL32(p)
175# endif
176
177# if defined(AV_WN32) && !defined(AV_WL32)
178# define AV_WL32(p, v) AV_WN32(p, v)
179# elif !defined(AV_WN32) && defined(AV_WL32)
180# define AV_WN32(p, v) AV_WL32(p, v)
181# endif
182
183# if defined(AV_RN48) && !defined(AV_RL48)
184# define AV_RL48(p) AV_RN48(p)
185# elif !defined(AV_RN48) && defined(AV_RL48)
186# define AV_RN48(p) AV_RL48(p)
187# endif
188
189# if defined(AV_WN48) && !defined(AV_WL48)
190# define AV_WL48(p, v) AV_WN48(p, v)
191# elif !defined(AV_WN48) && defined(AV_WL48)
192# define AV_WN48(p, v) AV_WL48(p, v)
193# endif
194
195# if defined(AV_RN64) && !defined(AV_RL64)
196# define AV_RL64(p) AV_RN64(p)
197# elif !defined(AV_RN64) && defined(AV_RL64)
198# define AV_RN64(p) AV_RL64(p)
199# endif
200
201# if defined(AV_WN64) && !defined(AV_WL64)
202# define AV_WL64(p, v) AV_WN64(p, v)
203# elif !defined(AV_WN64) && defined(AV_WL64)
204# define AV_WN64(p, v) AV_WL64(p, v)
205# endif
206
207#endif /* !AV_HAVE_BIGENDIAN */
208
209/*
210 * Define AV_[RW]N helper macros to simplify definitions not provided
211 * by per-arch headers.
212 */
213
214#if defined(__GNUC__) || defined(__clang__)
215
216union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
217union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
218union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
219
220# define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
221# define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
222
223#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64) || defined(_M_ARM64)) && AV_HAVE_FAST_UNALIGNED
224
225# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
226# define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
227
228#elif AV_HAVE_FAST_UNALIGNED
229
230# define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
231# define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
232
233#else
234
235#ifndef AV_RB16
236# define AV_RB16(x) \
237 ((((const uint8_t*)(x))[0] << 8) | \
238 ((const uint8_t*)(x))[1])
239#endif
240#ifndef AV_WB16
241# define AV_WB16(p, val) do { \
242 uint16_t d = (val); \
243 ((uint8_t*)(p))[1] = (d); \
244 ((uint8_t*)(p))[0] = (d)>>8; \
245 } while(0)
246#endif
247
248#ifndef AV_RL16
249# define AV_RL16(x) \
250 ((((const uint8_t*)(x))[1] << 8) | \
251 ((const uint8_t*)(x))[0])
252#endif
253#ifndef AV_WL16
254# define AV_WL16(p, val) do { \
255 uint16_t d = (val); \
256 ((uint8_t*)(p))[0] = (d); \
257 ((uint8_t*)(p))[1] = (d)>>8; \
258 } while(0)
259#endif
260
261#ifndef AV_RB32
262# define AV_RB32(x) \
263 (((uint32_t)((const uint8_t*)(x))[0] << 24) | \
264 (((const uint8_t*)(x))[1] << 16) | \
265 (((const uint8_t*)(x))[2] << 8) | \
266 ((const uint8_t*)(x))[3])
267#endif
268#ifndef AV_WB32
269# define AV_WB32(p, val) do { \
270 uint32_t d = (val); \
271 ((uint8_t*)(p))[3] = (d); \
272 ((uint8_t*)(p))[2] = (d)>>8; \
273 ((uint8_t*)(p))[1] = (d)>>16; \
274 ((uint8_t*)(p))[0] = (d)>>24; \
275 } while(0)
276#endif
277
278#ifndef AV_RL32
279# define AV_RL32(x) \
280 (((uint32_t)((const uint8_t*)(x))[3] << 24) | \
281 (((const uint8_t*)(x))[2] << 16) | \
282 (((const uint8_t*)(x))[1] << 8) | \
283 ((const uint8_t*)(x))[0])
284#endif
285#ifndef AV_WL32
286# define AV_WL32(p, val) do { \
287 uint32_t d = (val); \
288 ((uint8_t*)(p))[0] = (d); \
289 ((uint8_t*)(p))[1] = (d)>>8; \
290 ((uint8_t*)(p))[2] = (d)>>16; \
291 ((uint8_t*)(p))[3] = (d)>>24; \
292 } while(0)
293#endif
294
295#ifndef AV_RB64
296# define AV_RB64(x) \
297 (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
298 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
299 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
300 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
301 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
302 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
303 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
304 (uint64_t)((const uint8_t*)(x))[7])
305#endif
306#ifndef AV_WB64
307# define AV_WB64(p, val) do { \
308 uint64_t d = (val); \
309 ((uint8_t*)(p))[7] = (d); \
310 ((uint8_t*)(p))[6] = (d)>>8; \
311 ((uint8_t*)(p))[5] = (d)>>16; \
312 ((uint8_t*)(p))[4] = (d)>>24; \
313 ((uint8_t*)(p))[3] = (d)>>32; \
314 ((uint8_t*)(p))[2] = (d)>>40; \
315 ((uint8_t*)(p))[1] = (d)>>48; \
316 ((uint8_t*)(p))[0] = (d)>>56; \
317 } while(0)
318#endif
319
320#ifndef AV_RL64
321# define AV_RL64(x) \
322 (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
323 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
324 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
325 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
326 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
327 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
328 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
329 (uint64_t)((const uint8_t*)(x))[0])
330#endif
331#ifndef AV_WL64
332# define AV_WL64(p, val) do { \
333 uint64_t d = (val); \
334 ((uint8_t*)(p))[0] = (d); \
335 ((uint8_t*)(p))[1] = (d)>>8; \
336 ((uint8_t*)(p))[2] = (d)>>16; \
337 ((uint8_t*)(p))[3] = (d)>>24; \
338 ((uint8_t*)(p))[4] = (d)>>32; \
339 ((uint8_t*)(p))[5] = (d)>>40; \
340 ((uint8_t*)(p))[6] = (d)>>48; \
341 ((uint8_t*)(p))[7] = (d)>>56; \
342 } while(0)
343#endif
344
345#if AV_HAVE_BIGENDIAN
346# define AV_RN(s, p) AV_RB##s(p)
347# define AV_WN(s, p, v) AV_WB##s(p, v)
348#else
349# define AV_RN(s, p) AV_RL##s(p)
350# define AV_WN(s, p, v) AV_WL##s(p, v)
351#endif
352
353#endif /* HAVE_FAST_UNALIGNED */
354
355#ifndef AV_RN16
356# define AV_RN16(p) AV_RN(16, p)
357#endif
358
359#ifndef AV_RN32
360# define AV_RN32(p) AV_RN(32, p)
361#endif
362
363#ifndef AV_RN64
364# define AV_RN64(p) AV_RN(64, p)
365#endif
366
367#ifndef AV_WN16
368# define AV_WN16(p, v) AV_WN(16, p, v)
369#endif
370
371#ifndef AV_WN32
372# define AV_WN32(p, v) AV_WN(32, p, v)
373#endif
374
375#ifndef AV_WN64
376# define AV_WN64(p, v) AV_WN(64, p, v)
377#endif
378
379#if AV_HAVE_BIGENDIAN
380# define AV_RB(s, p) AV_RN##s(p)
381# define AV_WB(s, p, v) AV_WN##s(p, v)
382# define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
383# define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
384#else
385# define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
386# define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
387# define AV_RL(s, p) AV_RN##s(p)
388# define AV_WL(s, p, v) AV_WN##s(p, v)
389#endif
390
391#define AV_RB8(x) (((const uint8_t*)(x))[0])
392#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
393
394#define AV_RL8(x) AV_RB8(x)
395#define AV_WL8(p, d) AV_WB8(p, d)
396
397#ifndef AV_RB16
398# define AV_RB16(p) AV_RB(16, p)
399#endif
400#ifndef AV_WB16
401# define AV_WB16(p, v) AV_WB(16, p, v)
402#endif
403
404#ifndef AV_RL16
405# define AV_RL16(p) AV_RL(16, p)
406#endif
407#ifndef AV_WL16
408# define AV_WL16(p, v) AV_WL(16, p, v)
409#endif
410
411#ifndef AV_RB32
412# define AV_RB32(p) AV_RB(32, p)
413#endif
414#ifndef AV_WB32
415# define AV_WB32(p, v) AV_WB(32, p, v)
416#endif
417
418#ifndef AV_RL32
419# define AV_RL32(p) AV_RL(32, p)
420#endif
421#ifndef AV_WL32
422# define AV_WL32(p, v) AV_WL(32, p, v)
423#endif
424
425#ifndef AV_RB64
426# define AV_RB64(p) AV_RB(64, p)
427#endif
428#ifndef AV_WB64
429# define AV_WB64(p, v) AV_WB(64, p, v)
430#endif
431
432#ifndef AV_RL64
433# define AV_RL64(p) AV_RL(64, p)
434#endif
435#ifndef AV_WL64
436# define AV_WL64(p, v) AV_WL(64, p, v)
437#endif
438
439#ifndef AV_RB24
440# define AV_RB24(x) \
441 ((((const uint8_t*)(x))[0] << 16) | \
442 (((const uint8_t*)(x))[1] << 8) | \
443 ((const uint8_t*)(x))[2])
444#endif
445#ifndef AV_WB24
446# define AV_WB24(p, d) do { \
447 ((uint8_t*)(p))[2] = (d); \
448 ((uint8_t*)(p))[1] = (d)>>8; \
449 ((uint8_t*)(p))[0] = (d)>>16; \
450 } while(0)
451#endif
452
453#ifndef AV_RL24
454# define AV_RL24(x) \
455 ((((const uint8_t*)(x))[2] << 16) | \
456 (((const uint8_t*)(x))[1] << 8) | \
457 ((const uint8_t*)(x))[0])
458#endif
459#ifndef AV_WL24
460# define AV_WL24(p, d) do { \
461 ((uint8_t*)(p))[0] = (d); \
462 ((uint8_t*)(p))[1] = (d)>>8; \
463 ((uint8_t*)(p))[2] = (d)>>16; \
464 } while(0)
465#endif
466
467#ifndef AV_RB48
468# define AV_RB48(x) \
469 (((uint64_t)((const uint8_t*)(x))[0] << 40) | \
470 ((uint64_t)((const uint8_t*)(x))[1] << 32) | \
471 ((uint64_t)((const uint8_t*)(x))[2] << 24) | \
472 ((uint64_t)((const uint8_t*)(x))[3] << 16) | \
473 ((uint64_t)((const uint8_t*)(x))[4] << 8) | \
474 (uint64_t)((const uint8_t*)(x))[5])
475#endif
476#ifndef AV_WB48
477# define AV_WB48(p, darg) do { \
478 uint64_t d = (darg); \
479 ((uint8_t*)(p))[5] = (d); \
480 ((uint8_t*)(p))[4] = (d)>>8; \
481 ((uint8_t*)(p))[3] = (d)>>16; \
482 ((uint8_t*)(p))[2] = (d)>>24; \
483 ((uint8_t*)(p))[1] = (d)>>32; \
484 ((uint8_t*)(p))[0] = (d)>>40; \
485 } while(0)
486#endif
487
488#ifndef AV_RL48
489# define AV_RL48(x) \
490 (((uint64_t)((const uint8_t*)(x))[5] << 40) | \
491 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
492 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
493 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
494 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
495 (uint64_t)((const uint8_t*)(x))[0])
496#endif
497#ifndef AV_WL48
498# define AV_WL48(p, darg) do { \
499 uint64_t d = (darg); \
500 ((uint8_t*)(p))[0] = (d); \
501 ((uint8_t*)(p))[1] = (d)>>8; \
502 ((uint8_t*)(p))[2] = (d)>>16; \
503 ((uint8_t*)(p))[3] = (d)>>24; \
504 ((uint8_t*)(p))[4] = (d)>>32; \
505 ((uint8_t*)(p))[5] = (d)>>40; \
506 } while(0)
507#endif
508
509/*
510 * The AV_[RW]NA macros access naturally aligned data
511 * in a type-safe way.
512 */
513
514#define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
515#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
516
517#ifndef AV_RN16A
518# define AV_RN16A(p) AV_RNA(16, p)
519#endif
520
521#ifndef AV_RN32A
522# define AV_RN32A(p) AV_RNA(32, p)
523#endif
524
525#ifndef AV_RN64A
526# define AV_RN64A(p) AV_RNA(64, p)
527#endif
528
529#ifndef AV_WN16A
530# define AV_WN16A(p, v) AV_WNA(16, p, v)
531#endif
532
533#ifndef AV_WN32A
534# define AV_WN32A(p, v) AV_WNA(32, p, v)
535#endif
536
537#ifndef AV_WN64A
538# define AV_WN64A(p, v) AV_WNA(64, p, v)
539#endif
540
541#if AV_HAVE_BIGENDIAN
542# define AV_RLA(s, p) av_bswap##s(AV_RN##s##A(p))
543# define AV_WLA(s, p, v) AV_WN##s##A(p, av_bswap##s(v))
544# define AV_RBA(s, p) AV_RN##s##A(p)
545# define AV_WBA(s, p, v) AV_WN##s##A(p, v)
546#else
547# define AV_RLA(s, p) AV_RN##s##A(p)
548# define AV_WLA(s, p, v) AV_WN##s##A(p, v)
549# define AV_RBA(s, p) av_bswap##s(AV_RN##s##A(p))
550# define AV_WBA(s, p, v) AV_WN##s##A(p, av_bswap##s(v))
551#endif
552
553#ifndef AV_RL16A
554# define AV_RL16A(p) AV_RLA(16, p)
555#endif
556#ifndef AV_WL16A
557# define AV_WL16A(p, v) AV_WLA(16, p, v)
558#endif
559
560#ifndef AV_RB16A
561# define AV_RB16A(p) AV_RBA(16, p)
562#endif
563#ifndef AV_WB16A
564# define AV_WB16A(p, v) AV_WBA(16, p, v)
565#endif
566
567#ifndef AV_RL32A
568# define AV_RL32A(p) AV_RLA(32, p)
569#endif
570#ifndef AV_WL32A
571# define AV_WL32A(p, v) AV_WLA(32, p, v)
572#endif
573
574#ifndef AV_RB32A
575# define AV_RB32A(p) AV_RBA(32, p)
576#endif
577#ifndef AV_WB32A
578# define AV_WB32A(p, v) AV_WBA(32, p, v)
579#endif
580
581#ifndef AV_RL64A
582# define AV_RL64A(p) AV_RLA(64, p)
583#endif
584#ifndef AV_WL64A
585# define AV_WL64A(p, v) AV_WLA(64, p, v)
586#endif
587
588#ifndef AV_RB64A
589# define AV_RB64A(p) AV_RBA(64, p)
590#endif
591#ifndef AV_WB64A
592# define AV_WB64A(p, v) AV_WBA(64, p, v)
593#endif
594
595/*
596 * The AV_COPYxxU macros are suitable for copying data to/from unaligned
597 * memory locations.
598 */
599
600#define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
601
602#ifndef AV_COPY16U
603# define AV_COPY16U(d, s) AV_COPYU(16, d, s)
604#endif
605
606#ifndef AV_COPY32U
607# define AV_COPY32U(d, s) AV_COPYU(32, d, s)
608#endif
609
610#ifndef AV_COPY64U
611# define AV_COPY64U(d, s) AV_COPYU(64, d, s)
612#endif
613
614#ifndef AV_COPY128U
615# define AV_COPY128U(d, s) \
616 do { \
617 AV_COPY64U(d, s); \
618 AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
619 } while(0)
620#endif
621
622/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
623 * naturally aligned.
624 */
625
626#define AV_COPY(n, d, s) \
627 (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
628
629#ifndef AV_COPY16
630# define AV_COPY16(d, s) AV_COPY(16, d, s)
631#endif
632
633#ifndef AV_COPY32
634# define AV_COPY32(d, s) AV_COPY(32, d, s)
635#endif
636
637#ifndef AV_COPY64
638# define AV_COPY64(d, s) AV_COPY(64, d, s)
639#endif
640
641#ifndef AV_COPY128
642# define AV_COPY128(d, s) \
643 do { \
644 AV_COPY64(d, s); \
645 AV_COPY64((char*)(d)+8, (char*)(s)+8); \
646 } while(0)
647#endif
648
649#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
650
651#ifndef AV_SWAP64
652# define AV_SWAP64(a, b) AV_SWAP(64, a, b)
653#endif
654
655#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
656
657#ifndef AV_ZERO16
658# define AV_ZERO16(d) AV_ZERO(16, d)
659#endif
660
661#ifndef AV_ZERO32
662# define AV_ZERO32(d) AV_ZERO(32, d)
663#endif
664
665#ifndef AV_ZERO64
666# define AV_ZERO64(d) AV_ZERO(64, d)
667#endif
668
669#ifndef AV_ZERO128
670# define AV_ZERO128(d) \
671 do { \
672 AV_ZERO64(d); \
673 AV_ZERO64((char*)(d)+8); \
674 } while(0)
675#endif
676
677#endif /* AVUTIL_INTREADWRITE_H */
attributes.h
Macro definitions for various function/variable attributes.
av_alias
#define av_alias
Definition attributes.h:181
bswap.h
byte swapping routines
av_alias::u64
uint64_t u64
Definition intreadwrite.h:28
av_alias::u16
uint16_t u16[4]
Definition intreadwrite.h:30
av_alias::u8
uint8_t u8[8]
Definition intreadwrite.h:31
av_alias::u32
uint32_t u32[2]
Definition intreadwrite.h:29
av_alias::f32
float f32[2]
Definition intreadwrite.h:33
av_alias::f64
double f64
Definition intreadwrite.h:32
unaligned_16
Definition intreadwrite.h:218
unaligned_16::l
uint16_t l
Definition intreadwrite.h:218
unaligned_32
Definition intreadwrite.h:217
unaligned_32::l
uint32_t l
Definition intreadwrite.h:217
unaligned_64
Definition intreadwrite.h:216
unaligned_64::l
uint64_t l
Definition intreadwrite.h:216
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