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ffmpeg / libavutil / intreadwrite.h @ 4a051891

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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVUTIL_INTREADWRITE_H
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#define AVUTIL_INTREADWRITE_H
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#include <stdint.h>
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#include "config.h"
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#include "bswap.h"
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/*
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 * Arch-specific headers can provide any combination of
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 * AV_[RW][BLN](16|24|32|64) macros.  Preprocessor symbols must be
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 * defined, even if these are implemented as inline functions.
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 */
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#if   ARCH_ARM
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#   include "arm/intreadwrite.h"
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#elif ARCH_MIPS
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#   include "mips/intreadwrite.h"
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#elif ARCH_PPC
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#   include "ppc/intreadwrite.h"
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#endif
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/*
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 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.
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 */
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#if HAVE_BIGENDIAN
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#   if    defined(AV_RN16) && !defined(AV_RB16)
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#       define AV_RB16(p) AV_RN16(p)
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#   elif !defined(AV_RN16) &&  defined(AV_RB16)
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#       define AV_RN16(p) AV_RB16(p)
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#   endif
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#   if    defined(AV_WN16) && !defined(AV_WB16)
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#       define AV_WB16(p, v) AV_WN16(p, v)
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#   elif !defined(AV_WN16) &&  defined(AV_WB16)
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#       define AV_WN16(p, v) AV_WB16(p, v)
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#   endif
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#   if    defined(AV_RN24) && !defined(AV_RB24)
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#       define AV_RB24(p) AV_RN24(p)
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#   elif !defined(AV_RN24) &&  defined(AV_RB24)
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#       define AV_RN24(p) AV_RB24(p)
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#   endif
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#   if    defined(AV_WN24) && !defined(AV_WB24)
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#       define AV_WB24(p, v) AV_WN24(p, v)
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#   elif !defined(AV_WN24) &&  defined(AV_WB24)
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#       define AV_WN24(p, v) AV_WB24(p, v)
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#   endif
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#   if    defined(AV_RN32) && !defined(AV_RB32)
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#       define AV_RB32(p) AV_RN32(p)
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#   elif !defined(AV_RN32) &&  defined(AV_RB32)
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#       define AV_RN32(p) AV_RB32(p)
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#   endif
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#   if    defined(AV_WN32) && !defined(AV_WB32)
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#       define AV_WB32(p, v) AV_WN32(p, v)
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#   elif !defined(AV_WN32) &&  defined(AV_WB32)
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#       define AV_WN32(p, v) AV_WB32(p, v)
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#   endif
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#   if    defined(AV_RN64) && !defined(AV_RB64)
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#       define AV_RB64(p) AV_RN64(p)
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#   elif !defined(AV_RN64) &&  defined(AV_RB64)
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#       define AV_RN64(p) AV_RB64(p)
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#   endif
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#   if    defined(AV_WN64) && !defined(AV_WB64)
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#       define AV_WB64(p, v) AV_WN64(p, v)
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#   elif !defined(AV_WN64) &&  defined(AV_WB64)
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#       define AV_WN64(p, v) AV_WB64(p, v)
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#   endif
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#else /* HAVE_BIGENDIAN */
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#   if    defined(AV_RN16) && !defined(AV_RL16)
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#       define AV_RL16(p) AV_RN16(p)
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#   elif !defined(AV_RN16) &&  defined(AV_RL16)
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#       define AV_RN16(p) AV_RL16(p)
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#   endif
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#   if    defined(AV_WN16) && !defined(AV_WL16)
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#       define AV_WL16(p, v) AV_WN16(p, v)
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#   elif !defined(AV_WN16) &&  defined(AV_WL16)
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#       define AV_WN16(p, v) AV_WL16(p, v)
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#   endif
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#   if    defined(AV_RN24) && !defined(AV_RL24)
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#       define AV_RL24(p) AV_RN24(p)
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#   elif !defined(AV_RN24) &&  defined(AV_RL24)
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#       define AV_RN24(p) AV_RL24(p)
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#   endif
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#   if    defined(AV_WN24) && !defined(AV_WL24)
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#       define AV_WL24(p, v) AV_WN24(p, v)
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#   elif !defined(AV_WN24) &&  defined(AV_WL24)
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#       define AV_WN24(p, v) AV_WL24(p, v)
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#   endif
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#   if    defined(AV_RN32) && !defined(AV_RL32)
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#       define AV_RL32(p) AV_RN32(p)
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#   elif !defined(AV_RN32) &&  defined(AV_RL32)
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#       define AV_RN32(p) AV_RL32(p)
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#   endif
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#   if    defined(AV_WN32) && !defined(AV_WL32)
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#       define AV_WL32(p, v) AV_WN32(p, v)
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#   elif !defined(AV_WN32) &&  defined(AV_WL32)
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#       define AV_WN32(p, v) AV_WL32(p, v)
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#   endif
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#   if    defined(AV_RN64) && !defined(AV_RL64)
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#       define AV_RL64(p) AV_RN64(p)
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#   elif !defined(AV_RN64) &&  defined(AV_RL64)
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#       define AV_RN64(p) AV_RL64(p)
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#   endif
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#   if    defined(AV_WN64) && !defined(AV_WL64)
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#       define AV_WL64(p, v) AV_WN64(p, v)
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#   elif !defined(AV_WN64) &&  defined(AV_WL64)
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#       define AV_WN64(p, v) AV_WL64(p, v)
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#   endif
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#endif /* !HAVE_BIGENDIAN */
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/*
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 * Define AV_[RW]N helper macros to simplify definitions not provided
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 * by per-arch headers.
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 */
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#if   HAVE_ATTRIBUTE_PACKED
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struct unaligned_64 { uint64_t l; } __attribute__((packed));
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struct unaligned_32 { uint32_t l; } __attribute__((packed));
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struct unaligned_16 { uint16_t l; } __attribute__((packed));
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#   define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l)
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#   define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v)
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#elif defined(__DECC)
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#   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
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#   define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v)
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#elif HAVE_FAST_UNALIGNED
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#   define AV_RN(s, p) (*((const uint##s##_t*)(p)))
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#   define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v)
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#else
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#ifndef AV_RB16
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#   define AV_RB16(x)                           \
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    ((((const uint8_t*)(x))[0] << 8) |          \
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      ((const uint8_t*)(x))[1])
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#endif
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#ifndef AV_WB16
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#   define AV_WB16(p, d) do {                   \
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        ((uint8_t*)(p))[1] = (d);               \
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        ((uint8_t*)(p))[0] = (d)>>8;            \
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    } while(0)
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#endif
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#ifndef AV_RL16
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#   define AV_RL16(x)                           \
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    ((((const uint8_t*)(x))[1] << 8) |          \
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      ((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL16
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#   define AV_WL16(p, d) do {                   \
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        ((uint8_t*)(p))[0] = (d);               \
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        ((uint8_t*)(p))[1] = (d)>>8;            \
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    } while(0)
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#endif
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#ifndef AV_RB32
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#   define AV_RB32(x)                           \
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    ((((const uint8_t*)(x))[0] << 24) |         \
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     (((const uint8_t*)(x))[1] << 16) |         \
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     (((const uint8_t*)(x))[2] <<  8) |         \
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      ((const uint8_t*)(x))[3])
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#endif
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#ifndef AV_WB32
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#   define AV_WB32(p, d) do {                   \
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        ((uint8_t*)(p))[3] = (d);               \
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        ((uint8_t*)(p))[2] = (d)>>8;            \
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        ((uint8_t*)(p))[1] = (d)>>16;           \
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        ((uint8_t*)(p))[0] = (d)>>24;           \
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    } while(0)
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#endif
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#ifndef AV_RL32
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#   define AV_RL32(x)                           \
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    ((((const uint8_t*)(x))[3] << 24) |         \
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     (((const uint8_t*)(x))[2] << 16) |         \
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     (((const uint8_t*)(x))[1] <<  8) |         \
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      ((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL32
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#   define AV_WL32(p, d) do {                   \
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        ((uint8_t*)(p))[0] = (d);               \
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        ((uint8_t*)(p))[1] = (d)>>8;            \
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        ((uint8_t*)(p))[2] = (d)>>16;           \
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        ((uint8_t*)(p))[3] = (d)>>24;           \
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    } while(0)
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#endif
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#ifndef AV_RB64
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#   define AV_RB64(x)                                   \
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    (((uint64_t)((const uint8_t*)(x))[0] << 56) |       \
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     ((uint64_t)((const uint8_t*)(x))[1] << 48) |       \
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     ((uint64_t)((const uint8_t*)(x))[2] << 40) |       \
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     ((uint64_t)((const uint8_t*)(x))[3] << 32) |       \
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     ((uint64_t)((const uint8_t*)(x))[4] << 24) |       \
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     ((uint64_t)((const uint8_t*)(x))[5] << 16) |       \
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     ((uint64_t)((const uint8_t*)(x))[6] <<  8) |       \
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      (uint64_t)((const uint8_t*)(x))[7])
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#endif
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#ifndef AV_WB64
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#   define AV_WB64(p, d) do {                   \
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        ((uint8_t*)(p))[7] = (d);               \
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        ((uint8_t*)(p))[6] = (d)>>8;            \
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        ((uint8_t*)(p))[5] = (d)>>16;           \
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        ((uint8_t*)(p))[4] = (d)>>24;           \
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        ((uint8_t*)(p))[3] = (d)>>32;           \
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        ((uint8_t*)(p))[2] = (d)>>40;           \
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        ((uint8_t*)(p))[1] = (d)>>48;           \
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        ((uint8_t*)(p))[0] = (d)>>56;           \
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    } while(0)
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#endif
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#ifndef AV_RL64
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#   define AV_RL64(x)                                   \
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    (((uint64_t)((const uint8_t*)(x))[7] << 56) |       \
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     ((uint64_t)((const uint8_t*)(x))[6] << 48) |       \
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     ((uint64_t)((const uint8_t*)(x))[5] << 40) |       \
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     ((uint64_t)((const uint8_t*)(x))[4] << 32) |       \
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     ((uint64_t)((const uint8_t*)(x))[3] << 24) |       \
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     ((uint64_t)((const uint8_t*)(x))[2] << 16) |       \
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     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |       \
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      (uint64_t)((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL64
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#   define AV_WL64(p, d) do {                   \
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        ((uint8_t*)(p))[0] = (d);               \
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        ((uint8_t*)(p))[1] = (d)>>8;            \
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        ((uint8_t*)(p))[2] = (d)>>16;           \
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        ((uint8_t*)(p))[3] = (d)>>24;           \
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        ((uint8_t*)(p))[4] = (d)>>32;           \
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        ((uint8_t*)(p))[5] = (d)>>40;           \
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        ((uint8_t*)(p))[6] = (d)>>48;           \
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        ((uint8_t*)(p))[7] = (d)>>56;           \
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    } while(0)
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#endif
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#if HAVE_BIGENDIAN
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#   define AV_RN(s, p)    AV_RB##s(p)
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#   define AV_WN(s, p, v) AV_WB##s(p, v)
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#else
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#   define AV_RN(s, p)    AV_RL##s(p)
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#   define AV_WN(s, p, v) AV_WL##s(p, v)
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#endif
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#endif /* HAVE_FAST_UNALIGNED */
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#ifndef AV_RN16
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#   define AV_RN16(p) AV_RN(16, p)
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#endif
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#ifndef AV_RN32
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#   define AV_RN32(p) AV_RN(32, p)
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#endif
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#ifndef AV_RN64
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#   define AV_RN64(p) AV_RN(64, p)
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#endif
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#ifndef AV_WN16
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#   define AV_WN16(p, v) AV_WN(16, p, v)
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#endif
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#ifndef AV_WN32
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#   define AV_WN32(p, v) AV_WN(32, p, v)
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#endif
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#ifndef AV_WN64
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#   define AV_WN64(p, v) AV_WN(64, p, v)
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#endif
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#if HAVE_BIGENDIAN
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#   define AV_RB(s, p)    AV_RN##s(p)
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#   define AV_WB(s, p, v) AV_WN##s(p, v)
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#   define AV_RL(s, p)    bswap_##s(AV_RN##s(p))
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#   define AV_WL(s, p, v) AV_WN##s(p, bswap_##s(v))
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#else
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#   define AV_RB(s, p)    bswap_##s(AV_RN##s(p))
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#   define AV_WB(s, p, v) AV_WN##s(p, bswap_##s(v))
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#   define AV_RL(s, p)    AV_RN##s(p)
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#   define AV_WL(s, p, v) AV_WN##s(p, v)
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#endif
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#define AV_RB8(x)     (((const uint8_t*)(x))[0])
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#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)
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#define AV_RL8(x)     AV_RB8(x)
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#define AV_WL8(p, d)  AV_WB8(p, d)
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#ifndef AV_RB16
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#   define AV_RB16(p)    AV_RB(16, p)
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#endif
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#ifndef AV_WB16
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#   define AV_WB16(p, v) AV_WB(16, p, v)
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#endif
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#ifndef AV_RL16
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#   define AV_RL16(p)    AV_RL(16, p)
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#endif
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#ifndef AV_WL16
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#   define AV_WL16(p, v) AV_WL(16, p, v)
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#endif
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#ifndef AV_RB32
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#   define AV_RB32(p)    AV_RB(32, p)
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#endif
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#ifndef AV_WB32
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#   define AV_WB32(p, v) AV_WB(32, p, v)
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#endif
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#ifndef AV_RL32
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#   define AV_RL32(p)    AV_RL(32, p)
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#endif
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#ifndef AV_WL32
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#   define AV_WL32(p, v) AV_WL(32, p, v)
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#endif
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#ifndef AV_RB64
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#   define AV_RB64(p)    AV_RB(64, p)
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#endif
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#ifndef AV_WB64
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#   define AV_WB64(p, v) AV_WB(64, p, v)
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#endif
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#ifndef AV_RL64
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#   define AV_RL64(p)    AV_RL(64, p)
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#endif
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#ifndef AV_WL64
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#   define AV_WL64(p, v) AV_WL(64, p, v)
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#endif
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#ifndef AV_RB24
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#   define AV_RB24(x)                           \
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    ((((const uint8_t*)(x))[0] << 16) |         \
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     (((const uint8_t*)(x))[1] <<  8) |         \
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      ((const uint8_t*)(x))[2])
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#endif
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#ifndef AV_WB24
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#   define AV_WB24(p, d) do {                   \
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        ((uint8_t*)(p))[2] = (d);               \
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        ((uint8_t*)(p))[1] = (d)>>8;            \
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        ((uint8_t*)(p))[0] = (d)>>16;           \
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    } while(0)
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#endif
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#ifndef AV_RL24
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#   define AV_RL24(x)                           \
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    ((((const uint8_t*)(x))[2] << 16) |         \
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     (((const uint8_t*)(x))[1] <<  8) |         \
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      ((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL24
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#   define AV_WL24(p, d) do {                   \
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        ((uint8_t*)(p))[0] = (d);               \
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        ((uint8_t*)(p))[1] = (d)>>8;            \
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        ((uint8_t*)(p))[2] = (d)>>16;           \
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    } while(0)
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#endif
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#endif /* AVUTIL_INTREADWRITE_H */