intreadwrite: ensure arch-specific versions are always used if defined
[libav.git] / libavutil / 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
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19#ifndef AVUTIL_INTREADWRITE_H
20#define AVUTIL_INTREADWRITE_H
cf1e119b 21
99545457 22#include <stdint.h>
a087028a 23#include "config.h"
c08be350 24#include "bswap.h"
99545457 25
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26/*
27 * Arch-specific headers can provide any combination of
57c36bdc 28 * AV_[RW][BLN](16|24|32|64) macros. Preprocessor symbols must be
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29 * defined, even if these are implemented as inline functions.
30 */
31
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32#if ARCH_ARM
33# include "arm/intreadwrite.h"
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34#elif ARCH_MIPS
35# include "mips/intreadwrite.h"
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36#elif ARCH_PPC
37# include "ppc/intreadwrite.h"
3c55ce03 38#endif
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39
40/*
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41 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
42 */
43
44#if HAVE_BIGENDIAN
45
46# if defined(AV_RN16) && !defined(AV_RB16)
47# define AV_RB16(p) AV_RN16(p)
48# elif !defined(AV_RN16) && defined(AV_RB16)
49# define AV_RN16(p) AV_RB16(p)
50# endif
51
52# if defined(AV_WN16) && !defined(AV_WB16)
53# define AV_WB16(p, v) AV_WN16(p, v)
54# elif !defined(AV_WN16) && defined(AV_WB16)
55# define AV_WN16(p, v) AV_WB16(p, v)
56# endif
57
58# if defined(AV_RN32) && !defined(AV_RB32)
59# define AV_RB32(p) AV_RN32(p)
60# elif !defined(AV_RN32) && defined(AV_RB32)
61# define AV_RN32(p) AV_RB32(p)
62# endif
63
64# if defined(AV_RN24) && !defined(AV_RB24)
65# define AV_RB24(p) AV_RN24(p)
66# elif !defined(AV_RN24) && defined(AV_RB24)
67# define AV_RN24(p) AV_RB24(p)
68# endif
69
70# if defined(AV_WN24) && !defined(AV_WB24)
71# define AV_WB24(p, v) AV_WN24(p, v)
72# elif !defined(AV_WN24) && defined(AV_WB24)
73# define AV_WN24(p, v) AV_WB24(p, v)
74# endif
75
76# if defined(AV_WN32) && !defined(AV_WB32)
77# define AV_WB32(p, v) AV_WN32(p, v)
78# elif !defined(AV_WN32) && defined(AV_WB32)
79# define AV_WN32(p, v) AV_WB32(p, v)
80# endif
81
82# if defined(AV_RN64) && !defined(AV_RB64)
83# define AV_RB64(p) AV_RN64(p)
84# elif !defined(AV_RN64) && defined(AV_RB64)
85# define AV_RN64(p) AV_RB64(p)
86# endif
87
88# if defined(AV_WN64) && !defined(AV_WB64)
89# define AV_WB64(p, v) AV_WN64(p, v)
90# elif !defined(AV_WN64) && defined(AV_WB64)
91# define AV_WN64(p, v) AV_WB64(p, v)
92# endif
93
94#else /* HAVE_BIGENDIAN */
95
96# if defined(AV_RN16) && !defined(AV_RL16)
97# define AV_RL16(p) AV_RN16(p)
98# elif !defined(AV_RN16) && defined(AV_RL16)
99# define AV_RN16(p) AV_RL16(p)
100# endif
101
102# if defined(AV_WN16) && !defined(AV_WL16)
103# define AV_WL16(p, v) AV_WN16(p, v)
104# elif !defined(AV_WN16) && defined(AV_WL16)
105# define AV_WN16(p, v) AV_WL16(p, v)
106# endif
107
108# if defined(AV_RN32) && !defined(AV_RL32)
109# define AV_RL32(p) AV_RN32(p)
110# elif !defined(AV_RN32) && defined(AV_RL32)
111# define AV_RN32(p) AV_RL32(p)
112# endif
113
114# if defined(AV_RN24) && !defined(AV_RL24)
115# define AV_RL24(p) AV_RN24(p)
116# elif !defined(AV_RN24) && defined(AV_RL24)
117# define AV_RN24(p) AV_RL24(p)
118# endif
119
120# if defined(AV_WN24) && !defined(AV_WL24)
121# define AV_WL24(p, v) AV_WN24(p, v)
122# elif !defined(AV_WN24) && defined(AV_WL24)
123# define AV_WN24(p, v) AV_WL24(p, v)
124# endif
125
126# if defined(AV_WN32) && !defined(AV_WL32)
127# define AV_WL32(p, v) AV_WN32(p, v)
128# elif !defined(AV_WN32) && defined(AV_WL32)
129# define AV_WN32(p, v) AV_WL32(p, v)
130# endif
131
132# if defined(AV_RN64) && !defined(AV_RL64)
133# define AV_RL64(p) AV_RN64(p)
134# elif !defined(AV_RN64) && defined(AV_RL64)
135# define AV_RN64(p) AV_RL64(p)
136# endif
137
138# if defined(AV_WN64) && !defined(AV_WL64)
139# define AV_WL64(p, v) AV_WN64(p, v)
140# elif !defined(AV_WN64) && defined(AV_WL64)
141# define AV_WN64(p, v) AV_WL64(p, v)
142# endif
143
144#endif /* !HAVE_BIGENDIAN */
145
146/*
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147 * Define AV_[RW]N helper macros to simplify definitions not provided
148 * by per-arch headers.
149 */
150
e7ea5e3d 151#if HAVE_ATTRIBUTE_PACKED
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152
153struct unaligned_64 { uint64_t l; } __attribute__((packed));
154struct unaligned_32 { uint32_t l; } __attribute__((packed));
155struct unaligned_16 { uint16_t l; } __attribute__((packed));
156
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157# define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l)
158# define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v)
cf1e119b 159
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160#elif defined(__DECC)
161
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162# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
163# define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v)
fbbea48e 164
a6783b89 165#elif HAVE_FAST_UNALIGNED
fbbea48e 166
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167# define AV_RN(s, p) (*((const uint##s##_t*)(p)))
168# define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v)
fbbea48e 169
a6783b89 170#else
fbbea48e 171
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172#ifndef AV_RB16
173#define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | \
174 ((const uint8_t*)(x))[1])
175#endif
176#ifndef AV_WB16
803ca89c 177#define AV_WB16(p, d) do { \
7d4495da 178 ((uint8_t*)(p))[1] = (d); \
803ca89c 179 ((uint8_t*)(p))[0] = (d)>>8; } while(0)
a6783b89 180#endif
a3550abd 181
a6783b89 182#ifndef AV_RL16
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183#define AV_RL16(x) ((((const uint8_t*)(x))[1] << 8) | \
184 ((const uint8_t*)(x))[0])
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185#endif
186#ifndef AV_WL16
803ca89c 187#define AV_WL16(p, d) do { \
85b1a722 188 ((uint8_t*)(p))[0] = (d); \
803ca89c 189 ((uint8_t*)(p))[1] = (d)>>8; } while(0)
a6783b89 190#endif
7b829d2a 191
a6783b89 192#ifndef AV_RB32
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193#define AV_RB32(x) ((((const uint8_t*)(x))[0] << 24) | \
194 (((const uint8_t*)(x))[1] << 16) | \
195 (((const uint8_t*)(x))[2] << 8) | \
196 ((const uint8_t*)(x))[3])
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197#endif
198#ifndef AV_WB32
803ca89c 199#define AV_WB32(p, d) do { \
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200 ((uint8_t*)(p))[3] = (d); \
201 ((uint8_t*)(p))[2] = (d)>>8; \
202 ((uint8_t*)(p))[1] = (d)>>16; \
803ca89c 203 ((uint8_t*)(p))[0] = (d)>>24; } while(0)
a6783b89 204#endif
a3550abd 205
a6783b89 206#ifndef AV_RL32
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207#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \
208 (((const uint8_t*)(x))[2] << 16) | \
209 (((const uint8_t*)(x))[1] << 8) | \
210 ((const uint8_t*)(x))[0])
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211#endif
212#ifndef AV_WL32
803ca89c 213#define AV_WL32(p, d) do { \
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214 ((uint8_t*)(p))[0] = (d); \
215 ((uint8_t*)(p))[1] = (d)>>8; \
216 ((uint8_t*)(p))[2] = (d)>>16; \
803ca89c 217 ((uint8_t*)(p))[3] = (d)>>24; } while(0)
a6783b89 218#endif
9e010b41 219
a6783b89 220#ifndef AV_RB64
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221#define AV_RB64(x) (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
222 ((uint64_t)((const uint8_t*)(x))[1] << 48) | \
223 ((uint64_t)((const uint8_t*)(x))[2] << 40) | \
224 ((uint64_t)((const uint8_t*)(x))[3] << 32) | \
225 ((uint64_t)((const uint8_t*)(x))[4] << 24) | \
226 ((uint64_t)((const uint8_t*)(x))[5] << 16) | \
227 ((uint64_t)((const uint8_t*)(x))[6] << 8) | \
228 (uint64_t)((const uint8_t*)(x))[7])
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229#endif
230#ifndef AV_WB64
803ca89c 231#define AV_WB64(p, d) do { \
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232 ((uint8_t*)(p))[7] = (d); \
233 ((uint8_t*)(p))[6] = (d)>>8; \
234 ((uint8_t*)(p))[5] = (d)>>16; \
235 ((uint8_t*)(p))[4] = (d)>>24; \
236 ((uint8_t*)(p))[3] = (d)>>32; \
237 ((uint8_t*)(p))[2] = (d)>>40; \
238 ((uint8_t*)(p))[1] = (d)>>48; \
803ca89c 239 ((uint8_t*)(p))[0] = (d)>>56; } while(0)
a6783b89 240#endif
9e010b41 241
a6783b89 242#ifndef AV_RL64
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243#define AV_RL64(x) (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
244 ((uint64_t)((const uint8_t*)(x))[6] << 48) | \
245 ((uint64_t)((const uint8_t*)(x))[5] << 40) | \
246 ((uint64_t)((const uint8_t*)(x))[4] << 32) | \
247 ((uint64_t)((const uint8_t*)(x))[3] << 24) | \
248 ((uint64_t)((const uint8_t*)(x))[2] << 16) | \
249 ((uint64_t)((const uint8_t*)(x))[1] << 8) | \
250 (uint64_t)((const uint8_t*)(x))[0])
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251#endif
252#ifndef AV_WL64
803ca89c 253#define AV_WL64(p, d) do { \
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254 ((uint8_t*)(p))[0] = (d); \
255 ((uint8_t*)(p))[1] = (d)>>8; \
256 ((uint8_t*)(p))[2] = (d)>>16; \
257 ((uint8_t*)(p))[3] = (d)>>24; \
258 ((uint8_t*)(p))[4] = (d)>>32; \
259 ((uint8_t*)(p))[5] = (d)>>40; \
260 ((uint8_t*)(p))[6] = (d)>>48; \
803ca89c 261 ((uint8_t*)(p))[7] = (d)>>56; } while(0)
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262#endif
263
63613fe6 264#if HAVE_BIGENDIAN
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265# define AV_RN(s, p) AV_RB##s(p)
266# define AV_WN(s, p, v) AV_WB##s(p, v)
267#else
268# define AV_RN(s, p) AV_RL##s(p)
269# define AV_WN(s, p, v) AV_WL##s(p, v)
270#endif
271
272#endif /* HAVE_FAST_UNALIGNED */
273
274#ifndef AV_RN16
275# define AV_RN16(p) AV_RN(16, p)
276#endif
277
278#ifndef AV_RN32
279# define AV_RN32(p) AV_RN(32, p)
280#endif
281
282#ifndef AV_RN64
283# define AV_RN64(p) AV_RN(64, p)
284#endif
285
286#ifndef AV_WN16
287# define AV_WN16(p, v) AV_WN(16, p, v)
288#endif
289
290#ifndef AV_WN32
291# define AV_WN32(p, v) AV_WN(32, p, v)
292#endif
293
294#ifndef AV_WN64
295# define AV_WN64(p, v) AV_WN(64, p, v)
296#endif
297
63613fe6 298#if HAVE_BIGENDIAN
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299# define AV_RB(s, p) AV_RN##s(p)
300# define AV_WB(s, p, v) AV_WN##s(p, v)
301# define AV_RL(s, p) bswap_##s(AV_RN##s(p))
302# define AV_WL(s, p, v) AV_WN##s(p, bswap_##s(v))
a6783b89 303#else
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304# define AV_RB(s, p) bswap_##s(AV_RN##s(p))
305# define AV_WB(s, p, v) AV_WN##s(p, bswap_##s(v))
306# define AV_RL(s, p) AV_RN##s(p)
307# define AV_WL(s, p, v) AV_WN##s(p, v)
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308#endif
309
310#define AV_RB8(x) (((const uint8_t*)(x))[0])
311#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
312
313#define AV_RL8(x) AV_RB8(x)
314#define AV_WL8(p, d) AV_WB8(p, d)
315
316#ifndef AV_RB16
317# define AV_RB16(p) AV_RB(16, p)
318#endif
319#ifndef AV_WB16
320# define AV_WB16(p, v) AV_WB(16, p, v)
321#endif
322
323#ifndef AV_RL16
324# define AV_RL16(p) AV_RL(16, p)
325#endif
326#ifndef AV_WL16
327# define AV_WL16(p, v) AV_WL(16, p, v)
328#endif
329
330#ifndef AV_RB32
331# define AV_RB32(p) AV_RB(32, p)
332#endif
333#ifndef AV_WB32
334# define AV_WB32(p, v) AV_WB(32, p, v)
335#endif
336
337#ifndef AV_RL32
338# define AV_RL32(p) AV_RL(32, p)
339#endif
340#ifndef AV_WL32
341# define AV_WL32(p, v) AV_WL(32, p, v)
342#endif
343
344#ifndef AV_RB64
345# define AV_RB64(p) AV_RB(64, p)
346#endif
347#ifndef AV_WB64
348# define AV_WB64(p, v) AV_WB(64, p, v)
349#endif
350
351#ifndef AV_RL64
352# define AV_RL64(p) AV_RL(64, p)
353#endif
354#ifndef AV_WL64
355# define AV_WL64(p, v) AV_WL(64, p, v)
356#endif
fbbea48e 357
57c36bdc 358#ifndef AV_RB24
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359#define AV_RB24(x) ((((const uint8_t*)(x))[0] << 16) | \
360 (((const uint8_t*)(x))[1] << 8) | \
361 ((const uint8_t*)(x))[2])
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362#endif
363#ifndef AV_WB24
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364#define AV_WB24(p, d) do { \
365 ((uint8_t*)(p))[2] = (d); \
366 ((uint8_t*)(p))[1] = (d)>>8; \
367 ((uint8_t*)(p))[0] = (d)>>16; } while(0)
57c36bdc 368#endif
fbbea48e 369
57c36bdc 370#ifndef AV_RL24
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371#define AV_RL24(x) ((((const uint8_t*)(x))[2] << 16) | \
372 (((const uint8_t*)(x))[1] << 8) | \
373 ((const uint8_t*)(x))[0])
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374#endif
375#ifndef AV_WL24
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376#define AV_WL24(p, d) do { \
377 ((uint8_t*)(p))[0] = (d); \
378 ((uint8_t*)(p))[1] = (d)>>8; \
379 ((uint8_t*)(p))[2] = (d)>>16; } while(0)
57c36bdc 380#endif
9e010b41 381
98790382 382#endif /* AVUTIL_INTREADWRITE_H */