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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 
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  * 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_ARM
68 # include "arm/intreadwrite.h"
69 #elif ARCH_AVR32
70 # include "avr32/intreadwrite.h"
71 #elif ARCH_MIPS
72 # include "mips/intreadwrite.h"
73 #elif ARCH_PPC
74 # include "ppc/intreadwrite.h"
75 #elif ARCH_TOMI
76 # include "tomi/intreadwrite.h"
77 #elif ARCH_X86
78 # include "x86/intreadwrite.h"
79 #endif
80 
81 #endif /* HAVE_AV_CONFIG_H */
82 
83 /*
84  * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
85  */
86 
87 #if AV_HAVE_BIGENDIAN
88 
89 # if defined(AV_RN16) && !defined(AV_RB16)
90 # define AV_RB16(p) AV_RN16(p)
91 # elif !defined(AV_RN16) && defined(AV_RB16)
92 # define AV_RN16(p) AV_RB16(p)
93 # endif
94 
95 # if defined(AV_WN16) && !defined(AV_WB16)
96 # define AV_WB16(p, v) AV_WN16(p, v)
97 # elif !defined(AV_WN16) && defined(AV_WB16)
98 # define AV_WN16(p, v) AV_WB16(p, v)
99 # endif
100 
101 # if defined(AV_RN24) && !defined(AV_RB24)
102 # define AV_RB24(p) AV_RN24(p)
103 # elif !defined(AV_RN24) && defined(AV_RB24)
104 # define AV_RN24(p) AV_RB24(p)
105 # endif
106 
107 # if defined(AV_WN24) && !defined(AV_WB24)
108 # define AV_WB24(p, v) AV_WN24(p, v)
109 # elif !defined(AV_WN24) && defined(AV_WB24)
110 # define AV_WN24(p, v) AV_WB24(p, v)
111 # endif
112 
113 # if defined(AV_RN32) && !defined(AV_RB32)
114 # define AV_RB32(p) AV_RN32(p)
115 # elif !defined(AV_RN32) && defined(AV_RB32)
116 # define AV_RN32(p) AV_RB32(p)
117 # endif
118 
119 # if defined(AV_WN32) && !defined(AV_WB32)
120 # define AV_WB32(p, v) AV_WN32(p, v)
121 # elif !defined(AV_WN32) && defined(AV_WB32)
122 # define AV_WN32(p, v) AV_WB32(p, v)
123 # endif
124 
125 # if defined(AV_RN48) && !defined(AV_RB48)
126 # define AV_RB48(p) AV_RN48(p)
127 # elif !defined(AV_RN48) && defined(AV_RB48)
128 # define AV_RN48(p) AV_RB48(p)
129 # endif
130 
131 # if defined(AV_WN48) && !defined(AV_WB48)
132 # define AV_WB48(p, v) AV_WN48(p, v)
133 # elif !defined(AV_WN48) && defined(AV_WB48)
134 # define AV_WN48(p, v) AV_WB48(p, v)
135 # endif
136 
137 # if defined(AV_RN64) && !defined(AV_RB64)
138 # define AV_RB64(p) AV_RN64(p)
139 # elif !defined(AV_RN64) && defined(AV_RB64)
140 # define AV_RN64(p) AV_RB64(p)
141 # endif
142 
143 # if defined(AV_WN64) && !defined(AV_WB64)
144 # define AV_WB64(p, v) AV_WN64(p, v)
145 # elif !defined(AV_WN64) && defined(AV_WB64)
146 # define AV_WN64(p, v) AV_WB64(p, v)
147 # endif
148 
149 #else /* AV_HAVE_BIGENDIAN */
150 
151 # if defined(AV_RN16) && !defined(AV_RL16)
152 # define AV_RL16(p) AV_RN16(p)
153 # elif !defined(AV_RN16) && defined(AV_RL16)
154 # define AV_RN16(p) AV_RL16(p)
155 # endif
156 
157 # if defined(AV_WN16) && !defined(AV_WL16)
158 # define AV_WL16(p, v) AV_WN16(p, v)
159 # elif !defined(AV_WN16) && defined(AV_WL16)
160 # define AV_WN16(p, v) AV_WL16(p, v)
161 # endif
162 
163 # if defined(AV_RN24) && !defined(AV_RL24)
164 # define AV_RL24(p) AV_RN24(p)
165 # elif !defined(AV_RN24) && defined(AV_RL24)
166 # define AV_RN24(p) AV_RL24(p)
167 # endif
168 
169 # if defined(AV_WN24) && !defined(AV_WL24)
170 # define AV_WL24(p, v) AV_WN24(p, v)
171 # elif !defined(AV_WN24) && defined(AV_WL24)
172 # define AV_WN24(p, v) AV_WL24(p, v)
173 # endif
174 
175 # if defined(AV_RN32) && !defined(AV_RL32)
176 # define AV_RL32(p) AV_RN32(p)
177 # elif !defined(AV_RN32) && defined(AV_RL32)
178 # define AV_RN32(p) AV_RL32(p)
179 # endif
180 
181 # if defined(AV_WN32) && !defined(AV_WL32)
182 # define AV_WL32(p, v) AV_WN32(p, v)
183 # elif !defined(AV_WN32) && defined(AV_WL32)
184 # define AV_WN32(p, v) AV_WL32(p, v)
185 # endif
186 
187 # if defined(AV_RN48) && !defined(AV_RL48)
188 # define AV_RL48(p) AV_RN48(p)
189 # elif !defined(AV_RN48) && defined(AV_RL48)
190 # define AV_RN48(p) AV_RL48(p)
191 # endif
192 
193 # if defined(AV_WN48) && !defined(AV_WL48)
194 # define AV_WL48(p, v) AV_WN48(p, v)
195 # elif !defined(AV_WN48) && defined(AV_WL48)
196 # define AV_WN48(p, v) AV_WL48(p, v)
197 # endif
198 
199 # if defined(AV_RN64) && !defined(AV_RL64)
200 # define AV_RL64(p) AV_RN64(p)
201 # elif !defined(AV_RN64) && defined(AV_RL64)
202 # define AV_RN64(p) AV_RL64(p)
203 # endif
204 
205 # if defined(AV_WN64) && !defined(AV_WL64)
206 # define AV_WL64(p, v) AV_WN64(p, v)
207 # elif !defined(AV_WN64) && defined(AV_WL64)
208 # define AV_WN64(p, v) AV_WL64(p, v)
209 # endif
210 
211 #endif /* !AV_HAVE_BIGENDIAN */
212 
213 /*
214  * Define AV_[RW]N helper macros to simplify definitions not provided
215  * by per-arch headers.
216  */
217 
218 #if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)
219 
220 union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;
221 union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;
222 union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;
223 
224 # define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)
225 # define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))
226 
227 #elif defined(__DECC)
228 
229 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
230 # define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
231 
232 #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_X64)) && AV_HAVE_FAST_UNALIGNED
233 
234 # define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
235 # define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))
236 
237 #elif AV_HAVE_FAST_UNALIGNED
238 
239 # define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)
240 # define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))
241 
242 #else
243 
244 #ifndef AV_RB16
245 # define AV_RB16(x) \
246  ((((const uint8_t*)(x))[0] << 8) | \
247  ((const uint8_t*)(x))[1])
248 #endif
249 #ifndef AV_WB16
250 # define AV_WB16(p, val) do { \
251  uint16_t d = (val); \
252  ((uint8_t*)(p))[1] = (d); \
253  ((uint8_t*)(p))[0] = (d)>>8; \
254  } while(0)
255 #endif
256 
257 #ifndef AV_RL16
258 # define AV_RL16(x) \
259  ((((const uint8_t*)(x))[1] << 8) | \
260  ((const uint8_t*)(x))[0])
261 #endif
262 #ifndef AV_WL16
263 # define AV_WL16(p, val) do { \
264  uint16_t d = (val); \
265  ((uint8_t*)(p))[0] = (d); \
266  ((uint8_t*)(p))[1] = (d)>>8; \
267  } while(0)
268 #endif
269 
270 #ifndef AV_RB32
271 # define AV_RB32(x) \
272  (((uint32_t)((const uint8_t*)(x))[0] << 24) | \
273  (((const uint8_t*)(x))[1] << 16) | \
274  (((const uint8_t*)(x))[2] << 8) | \
275  ((const uint8_t*)(x))[3])
276 #endif
277 #ifndef AV_WB32
278 # define AV_WB32(p, val) do { \
279  uint32_t d = (val); \
280  ((uint8_t*)(p))[3] = (d); \
281  ((uint8_t*)(p))[2] = (d)>>8; \
282  ((uint8_t*)(p))[1] = (d)>>16; \
283  ((uint8_t*)(p))[0] = (d)>>24; \
284  } while(0)
285 #endif
286 
287 #ifndef AV_RL32
288 # define AV_RL32(x) \
289  (((uint32_t)((const uint8_t*)(x))[3] << 24) | \
290  (((const uint8_t*)(x))[2] << 16) | \
291  (((const uint8_t*)(x))[1] << 8) | \
292  ((const uint8_t*)(x))[0])
293 #endif
294 #ifndef AV_WL32
295 # define AV_WL32(p, val) do { \
296  uint32_t d = (val); \
297  ((uint8_t*)(p))[0] = (d); \
298  ((uint8_t*)(p))[1] = (d)>>8; \
299  ((uint8_t*)(p))[2] = (d)>>16; \
300  ((uint8_t*)(p))[3] = (d)>>24; \
301  } while(0)
302 #endif
303 
304 #ifndef AV_RB64
305 # define AV_RB64(x) \
306  (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
307  ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
308  ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
309  ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
310  ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
311  ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
312  ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
313  (uint64_t)((const uint8_t*)(x))[7])
314 #endif
315 #ifndef AV_WB64
316 # define AV_WB64(p, val) do { \
317  uint64_t d = (val); \
318  ((uint8_t*)(p))[7] = (d); \
319  ((uint8_t*)(p))[6] = (d)>>8; \
320  ((uint8_t*)(p))[5] = (d)>>16; \
321  ((uint8_t*)(p))[4] = (d)>>24; \
322  ((uint8_t*)(p))[3] = (d)>>32; \
323  ((uint8_t*)(p))[2] = (d)>>40; \
324  ((uint8_t*)(p))[1] = (d)>>48; \
325  ((uint8_t*)(p))[0] = (d)>>56; \
326  } while(0)
327 #endif
328 
329 #ifndef AV_RL64
330 # define AV_RL64(x) \
331  (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
332  ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
333  ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
334  ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
335  ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
336  ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
337  ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
338  (uint64_t)((const uint8_t*)(x))[0])
339 #endif
340 #ifndef AV_WL64
341 # define AV_WL64(p, val) do { \
342  uint64_t d = (val); \
343  ((uint8_t*)(p))[0] = (d); \
344  ((uint8_t*)(p))[1] = (d)>>8; \
345  ((uint8_t*)(p))[2] = (d)>>16; \
346  ((uint8_t*)(p))[3] = (d)>>24; \
347  ((uint8_t*)(p))[4] = (d)>>32; \
348  ((uint8_t*)(p))[5] = (d)>>40; \
349  ((uint8_t*)(p))[6] = (d)>>48; \
350  ((uint8_t*)(p))[7] = (d)>>56; \
351  } while(0)
352 #endif
353 
354 #if AV_HAVE_BIGENDIAN
355 # define AV_RN(s, p) AV_RB##s(p)
356 # define AV_WN(s, p, v) AV_WB##s(p, v)
357 #else
358 # define AV_RN(s, p) AV_RL##s(p)
359 # define AV_WN(s, p, v) AV_WL##s(p, v)
360 #endif
361 
362 #endif /* HAVE_FAST_UNALIGNED */
363 
364 #ifndef AV_RN16
365 # define AV_RN16(p) AV_RN(16, p)
366 #endif
367 
368 #ifndef AV_RN32
369 # define AV_RN32(p) AV_RN(32, p)
370 #endif
371 
372 #ifndef AV_RN64
373 # define AV_RN64(p) AV_RN(64, p)
374 #endif
375 
376 #ifndef AV_WN16
377 # define AV_WN16(p, v) AV_WN(16, p, v)
378 #endif
379 
380 #ifndef AV_WN32
381 # define AV_WN32(p, v) AV_WN(32, p, v)
382 #endif
383 
384 #ifndef AV_WN64
385 # define AV_WN64(p, v) AV_WN(64, p, v)
386 #endif
387 
388 #if AV_HAVE_BIGENDIAN
389 # define AV_RB(s, p) AV_RN##s(p)
390 # define AV_WB(s, p, v) AV_WN##s(p, v)
391 # define AV_RL(s, p) av_bswap##s(AV_RN##s(p))
392 # define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))
393 #else
394 # define AV_RB(s, p) av_bswap##s(AV_RN##s(p))
395 # define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))
396 # define AV_RL(s, p) AV_RN##s(p)
397 # define AV_WL(s, p, v) AV_WN##s(p, v)
398 #endif
399 
400 #define AV_RB8(x) (((const uint8_t*)(x))[0])
401 #define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
402 
403 #define AV_RL8(x) AV_RB8(x)
404 #define AV_WL8(p, d) AV_WB8(p, d)
405 
406 #ifndef AV_RB16
407 # define AV_RB16(p) AV_RB(16, p)
408 #endif
409 #ifndef AV_WB16
410 # define AV_WB16(p, v) AV_WB(16, p, v)
411 #endif
412 
413 #ifndef AV_RL16
414 # define AV_RL16(p) AV_RL(16, p)
415 #endif
416 #ifndef AV_WL16
417 # define AV_WL16(p, v) AV_WL(16, p, v)
418 #endif
419 
420 #ifndef AV_RB32
421 # define AV_RB32(p) AV_RB(32, p)
422 #endif
423 #ifndef AV_WB32
424 # define AV_WB32(p, v) AV_WB(32, p, v)
425 #endif
426 
427 #ifndef AV_RL32
428 # define AV_RL32(p) AV_RL(32, p)
429 #endif
430 #ifndef AV_WL32
431 # define AV_WL32(p, v) AV_WL(32, p, v)
432 #endif
433 
434 #ifndef AV_RB64
435 # define AV_RB64(p) AV_RB(64, p)
436 #endif
437 #ifndef AV_WB64
438 # define AV_WB64(p, v) AV_WB(64, p, v)
439 #endif
440 
441 #ifndef AV_RL64
442 # define AV_RL64(p) AV_RL(64, p)
443 #endif
444 #ifndef AV_WL64
445 # define AV_WL64(p, v) AV_WL(64, p, v)
446 #endif
447 
448 #ifndef AV_RB24
449 # define AV_RB24(x) \
450  ((((const uint8_t*)(x))[0] << 16) | \
451  (((const uint8_t*)(x))[1] << 8) | \
452  ((const uint8_t*)(x))[2])
453 #endif
454 #ifndef AV_WB24
455 # define AV_WB24(p, d) do { \
456  ((uint8_t*)(p))[2] = (d); \
457  ((uint8_t*)(p))[1] = (d)>>8; \
458  ((uint8_t*)(p))[0] = (d)>>16; \
459  } while(0)
460 #endif
461 
462 #ifndef AV_RL24
463 # define AV_RL24(x) \
464  ((((const uint8_t*)(x))[2] << 16) | \
465  (((const uint8_t*)(x))[1] << 8) | \
466  ((const uint8_t*)(x))[0])
467 #endif
468 #ifndef AV_WL24
469 # define AV_WL24(p, d) do { \
470  ((uint8_t*)(p))[0] = (d); \
471  ((uint8_t*)(p))[1] = (d)>>8; \
472  ((uint8_t*)(p))[2] = (d)>>16; \
473  } while(0)
474 #endif
475 
476 #ifndef AV_RB48
477 # define AV_RB48(x) \
478  (((uint64_t)((const uint8_t*)(x))[0] << 40) | \
479  ((uint64_t)((const uint8_t*)(x))[1] << 32) | \
480  ((uint64_t)((const uint8_t*)(x))[2] << 24) | \
481  ((uint64_t)((const uint8_t*)(x))[3] << 16) | \
482  ((uint64_t)((const uint8_t*)(x))[4] << 8) | \
483  (uint64_t)((const uint8_t*)(x))[5])
484 #endif
485 #ifndef AV_WB48
486 # define AV_WB48(p, darg) do { \
487  uint64_t d = (darg); \
488  ((uint8_t*)(p))[5] = (d); \
489  ((uint8_t*)(p))[4] = (d)>>8; \
490  ((uint8_t*)(p))[3] = (d)>>16; \
491  ((uint8_t*)(p))[2] = (d)>>24; \
492  ((uint8_t*)(p))[1] = (d)>>32; \
493  ((uint8_t*)(p))[0] = (d)>>40; \
494  } while(0)
495 #endif
496 
497 #ifndef AV_RL48
498 # define AV_RL48(x) \
499  (((uint64_t)((const uint8_t*)(x))[5] << 40) | \
500  ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
501  ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
502  ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
503  ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
504  (uint64_t)((const uint8_t*)(x))[0])
505 #endif
506 #ifndef AV_WL48
507 # define AV_WL48(p, darg) do { \
508  uint64_t d = (darg); \
509  ((uint8_t*)(p))[0] = (d); \
510  ((uint8_t*)(p))[1] = (d)>>8; \
511  ((uint8_t*)(p))[2] = (d)>>16; \
512  ((uint8_t*)(p))[3] = (d)>>24; \
513  ((uint8_t*)(p))[4] = (d)>>32; \
514  ((uint8_t*)(p))[5] = (d)>>40; \
515  } while(0)
516 #endif
517 
518 /*
519  * The AV_[RW]NA macros access naturally aligned data
520  * in a type-safe way.
521  */
522 
523 #define AV_RNA(s, p) (((const av_alias##s*)(p))->u##s)
524 #define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))
525 
526 #ifndef AV_RN16A
527 # define AV_RN16A(p) AV_RNA(16, p)
528 #endif
529 
530 #ifndef AV_RN32A
531 # define AV_RN32A(p) AV_RNA(32, p)
532 #endif
533 
534 #ifndef AV_RN64A
535 # define AV_RN64A(p) AV_RNA(64, p)
536 #endif
537 
538 #ifndef AV_WN16A
539 # define AV_WN16A(p, v) AV_WNA(16, p, v)
540 #endif
541 
542 #ifndef AV_WN32A
543 # define AV_WN32A(p, v) AV_WNA(32, p, v)
544 #endif
545 
546 #ifndef AV_WN64A
547 # define AV_WN64A(p, v) AV_WNA(64, p, v)
548 #endif
549 
550 /*
551  * The AV_COPYxxU macros are suitable for copying data to/from unaligned
552  * memory locations.
553  */
554 
555 #define AV_COPYU(n, d, s) AV_WN##n(d, AV_RN##n(s));
556 
557 #ifndef AV_COPY16U
558 # define AV_COPY16U(d, s) AV_COPYU(16, d, s)
559 #endif
560 
561 #ifndef AV_COPY32U
562 # define AV_COPY32U(d, s) AV_COPYU(32, d, s)
563 #endif
564 
565 #ifndef AV_COPY64U
566 # define AV_COPY64U(d, s) AV_COPYU(64, d, s)
567 #endif
568 
569 #ifndef AV_COPY128U
570 # define AV_COPY128U(d, s) \
571  do { \
572  AV_COPY64U(d, s); \
573  AV_COPY64U((char *)(d) + 8, (const char *)(s) + 8); \
574  } while(0)
575 #endif
576 
577 /* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be
578  * naturally aligned. They may be implemented using MMX,
579  * so emms_c() must be called before using any float code
580  * afterwards.
581  */
582 
583 #define AV_COPY(n, d, s) \
584  (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)
585 
586 #ifndef AV_COPY16
587 # define AV_COPY16(d, s) AV_COPY(16, d, s)
588 #endif
589 
590 #ifndef AV_COPY32
591 # define AV_COPY32(d, s) AV_COPY(32, d, s)
592 #endif
593 
594 #ifndef AV_COPY64
595 # define AV_COPY64(d, s) AV_COPY(64, d, s)
596 #endif
597 
598 #ifndef AV_COPY128
599 # define AV_COPY128(d, s) \
600  do { \
601  AV_COPY64(d, s); \
602  AV_COPY64((char*)(d)+8, (char*)(s)+8); \
603  } while(0)
604 #endif
605 
606 #define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))
607 
608 #ifndef AV_SWAP64
609 # define AV_SWAP64(a, b) AV_SWAP(64, a, b)
610 #endif
611 
612 #define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)
613 
614 #ifndef AV_ZERO16
615 # define AV_ZERO16(d) AV_ZERO(16, d)
616 #endif
617 
618 #ifndef AV_ZERO32
619 # define AV_ZERO32(d) AV_ZERO(32, d)
620 #endif
621 
622 #ifndef AV_ZERO64
623 # define AV_ZERO64(d) AV_ZERO(64, d)
624 #endif
625 
626 #ifndef AV_ZERO128
627 # define AV_ZERO128(d) \
628  do { \
629  AV_ZERO64(d); \
630  AV_ZERO64((char*)(d)+8); \
631  } while(0)
632 #endif
633 
634 #endif /* AVUTIL_INTREADWRITE_H */
unaligned_64
Definition: intreadwrite.h:220
unaligned_32::l
uint32_t l
Definition: intreadwrite.h:221
attributes.h
Macro definitions for various function/variable attributes.
unaligned_64::l
uint64_t l
Definition: intreadwrite.h:220
uint8_t
uint8_t
Definition: audio_convert.c:194
av_alias
Definition: intreadwrite.h:27
unaligned_32
Definition: intreadwrite.h:221
unaligned_16::l
uint16_t l
Definition: intreadwrite.h:222
av_alias::u64
uint64_t u64
Definition: intreadwrite.h:28
bswap.h
byte swapping routines
unaligned_16
Definition: intreadwrite.h:222
av_alias::f64
double f64
Definition: intreadwrite.h:32
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