PeerStreamer

/*

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef AVUTIL_INTREADWRITE_H

#define AVUTIL_INTREADWRITE_H

#include <stdint.h>

#include "config.h"

#include "bswap.h"

/*

 * Arch-specific headers can provide any combination of

 * AV_[RW][BLN](16|24|32|64) macros.  Preprocessor symbols must be

 * defined, even if these are implemented as inline functions.

 */

#if   ARCH_ARM

#   include "arm/intreadwrite.h"

#elif ARCH_MIPS

#   include "mips/intreadwrite.h"

#elif ARCH_PPC

#   include "ppc/intreadwrite.h"

#endif

/*

 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.

 */

#if HAVE_BIGENDIAN

#   if    defined(AV_RN16) && !defined(AV_RB16)

#       define AV_RB16(p) AV_RN16(p)

#   elif !defined(AV_RN16) &&  defined(AV_RB16)

#       define AV_RN16(p) AV_RB16(p)

#   endif

#   if    defined(AV_WN16) && !defined(AV_WB16)

#       define AV_WB16(p, v) AV_WN16(p, v)

#   elif !defined(AV_WN16) &&  defined(AV_WB16)

#       define AV_WN16(p, v) AV_WB16(p, v)

#   endif

#   if    defined(AV_RN32) && !defined(AV_RB32)

#       define AV_RB32(p) AV_RN32(p)

#   elif !defined(AV_RN32) &&  defined(AV_RB32)

#       define AV_RN32(p) AV_RB32(p)

#   endif

#   if    defined(AV_RN24) && !defined(AV_RB24)

#       define AV_RB24(p) AV_RN24(p)

#   elif !defined(AV_RN24) &&  defined(AV_RB24)

#       define AV_RN24(p) AV_RB24(p)

#   endif

#   if    defined(AV_WN24) && !defined(AV_WB24)

#       define AV_WB24(p, v) AV_WN24(p, v)

#   elif !defined(AV_WN24) &&  defined(AV_WB24)

#       define AV_WN24(p, v) AV_WB24(p, v)

#   endif

#   if    defined(AV_WN32) && !defined(AV_WB32)

#       define AV_WB32(p, v) AV_WN32(p, v)

#   elif !defined(AV_WN32) &&  defined(AV_WB32)

#       define AV_WN32(p, v) AV_WB32(p, v)

#   endif

#   if    defined(AV_RN64) && !defined(AV_RB64)

#       define AV_RB64(p) AV_RN64(p)

#   elif !defined(AV_RN64) &&  defined(AV_RB64)

#       define AV_RN64(p) AV_RB64(p)

#   endif

#   if    defined(AV_WN64) && !defined(AV_WB64)

#       define AV_WB64(p, v) AV_WN64(p, v)

#   elif !defined(AV_WN64) &&  defined(AV_WB64)

#       define AV_WN64(p, v) AV_WB64(p, v)

#   endif

#else /* HAVE_BIGENDIAN */

#   if    defined(AV_RN16) && !defined(AV_RL16)

#       define AV_RL16(p) AV_RN16(p)

#   elif !defined(AV_RN16) &&  defined(AV_RL16)

#       define AV_RN16(p) AV_RL16(p)

#   endif

#   if    defined(AV_WN16) && !defined(AV_WL16)

#       define AV_WL16(p, v) AV_WN16(p, v)

#   elif !defined(AV_WN16) &&  defined(AV_WL16)

#       define AV_WN16(p, v) AV_WL16(p, v)

#   endif

#   if    defined(AV_RN32) && !defined(AV_RL32)

#       define AV_RL32(p) AV_RN32(p)

#   elif !defined(AV_RN32) &&  defined(AV_RL32)

#       define AV_RN32(p) AV_RL32(p)

#   endif

#   if    defined(AV_RN24) && !defined(AV_RL24)

#       define AV_RL24(p) AV_RN24(p)

#   elif !defined(AV_RN24) &&  defined(AV_RL24)

#       define AV_RN24(p) AV_RL24(p)

#   endif

#   if    defined(AV_WN24) && !defined(AV_WL24)

#       define AV_WL24(p, v) AV_WN24(p, v)

#   elif !defined(AV_WN24) &&  defined(AV_WL24)

#       define AV_WN24(p, v) AV_WL24(p, v)

#   endif

#   if    defined(AV_WN32) && !defined(AV_WL32)

#       define AV_WL32(p, v) AV_WN32(p, v)

#   elif !defined(AV_WN32) &&  defined(AV_WL32)

#       define AV_WN32(p, v) AV_WL32(p, v)

#   endif

#   if    defined(AV_RN64) && !defined(AV_RL64)

#       define AV_RL64(p) AV_RN64(p)

#   elif !defined(AV_RN64) &&  defined(AV_RL64)

#       define AV_RN64(p) AV_RL64(p)

#   endif

#   if    defined(AV_WN64) && !defined(AV_WL64)

#       define AV_WL64(p, v) AV_WN64(p, v)

#   elif !defined(AV_WN64) &&  defined(AV_WL64)

#       define AV_WN64(p, v) AV_WL64(p, v)

#   endif

#endif /* !HAVE_BIGENDIAN */

/*

 * Define AV_[RW]N helper macros to simplify definitions not provided

 * by per-arch headers.

 */

#if   HAVE_ATTRIBUTE_PACKED

struct unaligned_64 { uint64_t l; } __attribute__((packed));

struct unaligned_32 { uint32_t l; } __attribute__((packed));

struct unaligned_16 { uint16_t l; } __attribute__((packed));

#   define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l)

#   define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v)

#elif defined(__DECC)

#   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))

#   define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v)

#elif HAVE_FAST_UNALIGNED

#   define AV_RN(s, p) (*((const uint##s##_t*)(p)))

#   define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v)

#else

#ifndef AV_RB16

#define AV_RB16(x)  ((((const uint8_t*)(x))[0] << 8) | \

                      ((const uint8_t*)(x))[1])

#endif

#ifndef AV_WB16

#define AV_WB16(p, d) do { \

                    ((uint8_t*)(p))[1] = (d); \

                    ((uint8_t*)(p))[0] = (d)>>8; } while(0)

#endif

#ifndef AV_RL16

#define AV_RL16(x)  ((((const uint8_t*)(x))[1] << 8) | \

                      ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL16

#define AV_WL16(p, d) do { \

                    ((uint8_t*)(p))[0] = (d); \

                    ((uint8_t*)(p))[1] = (d)>>8; } while(0)

#endif

#ifndef AV_RB32

#define AV_RB32(x)  ((((const uint8_t*)(x))[0] << 24) | \

                     (((const uint8_t*)(x))[1] << 16) | \

                     (((const uint8_t*)(x))[2] <<  8) | \

                      ((const uint8_t*)(x))[3])

#endif

#ifndef AV_WB32

#define AV_WB32(p, d) do { \

                    ((uint8_t*)(p))[3] = (d); \

                    ((uint8_t*)(p))[2] = (d)>>8; \

                    ((uint8_t*)(p))[1] = (d)>>16; \

                    ((uint8_t*)(p))[0] = (d)>>24; } while(0)

#endif

#ifndef AV_RL32

#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \

                    (((const uint8_t*)(x))[2] << 16) | \

                    (((const uint8_t*)(x))[1] <<  8) | \

                     ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL32

#define AV_WL32(p, d) do { \

                    ((uint8_t*)(p))[0] = (d); \

                    ((uint8_t*)(p))[1] = (d)>>8; \

                    ((uint8_t*)(p))[2] = (d)>>16; \

                    ((uint8_t*)(p))[3] = (d)>>24; } while(0)

#endif

#ifndef AV_RB64

#define AV_RB64(x)  (((uint64_t)((const uint8_t*)(x))[0] << 56) | \

                     ((uint64_t)((const uint8_t*)(x))[1] << 48) | \

                     ((uint64_t)((const uint8_t*)(x))[2] << 40) | \

                     ((uint64_t)((const uint8_t*)(x))[3] << 32) | \

                     ((uint64_t)((const uint8_t*)(x))[4] << 24) | \

                     ((uint64_t)((const uint8_t*)(x))[5] << 16) | \

                     ((uint64_t)((const uint8_t*)(x))[6] <<  8) | \

                      (uint64_t)((const uint8_t*)(x))[7])

#endif

#ifndef AV_WB64

#define AV_WB64(p, d) do { \

                    ((uint8_t*)(p))[7] = (d);     \

                    ((uint8_t*)(p))[6] = (d)>>8;  \

                    ((uint8_t*)(p))[5] = (d)>>16; \

                    ((uint8_t*)(p))[4] = (d)>>24; \

                    ((uint8_t*)(p))[3] = (d)>>32; \

                    ((uint8_t*)(p))[2] = (d)>>40; \

                    ((uint8_t*)(p))[1] = (d)>>48; \

                    ((uint8_t*)(p))[0] = (d)>>56; } while(0)

#endif

#ifndef AV_RL64

#define AV_RL64(x)  (((uint64_t)((const uint8_t*)(x))[7] << 56) | \

                     ((uint64_t)((const uint8_t*)(x))[6] << 48) | \

                     ((uint64_t)((const uint8_t*)(x))[5] << 40) | \

                     ((uint64_t)((const uint8_t*)(x))[4] << 32) | \

                     ((uint64_t)((const uint8_t*)(x))[3] << 24) | \

                     ((uint64_t)((const uint8_t*)(x))[2] << 16) | \

                     ((uint64_t)((const uint8_t*)(x))[1] <<  8) | \

                      (uint64_t)((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL64

#define AV_WL64(p, d) do { \

                    ((uint8_t*)(p))[0] = (d);     \

                    ((uint8_t*)(p))[1] = (d)>>8;  \

                    ((uint8_t*)(p))[2] = (d)>>16; \

                    ((uint8_t*)(p))[3] = (d)>>24; \

                    ((uint8_t*)(p))[4] = (d)>>32; \

                    ((uint8_t*)(p))[5] = (d)>>40; \

                    ((uint8_t*)(p))[6] = (d)>>48; \

                    ((uint8_t*)(p))[7] = (d)>>56; } while(0)

#endif

#if HAVE_BIGENDIAN

#   define AV_RN(s, p)    AV_RB##s(p)

#   define AV_WN(s, p, v) AV_WB##s(p, v)

#else

#   define AV_RN(s, p)    AV_RL##s(p)

#   define AV_WN(s, p, v) AV_WL##s(p, v)

#endif

#endif /* HAVE_FAST_UNALIGNED */

#ifndef AV_RN16

#   define AV_RN16(p) AV_RN(16, p)

#endif

#ifndef AV_RN32

#   define AV_RN32(p) AV_RN(32, p)

#endif

#ifndef AV_RN64

#   define AV_RN64(p) AV_RN(64, p)

#endif

#ifndef AV_WN16

#   define AV_WN16(p, v) AV_WN(16, p, v)

#endif

#ifndef AV_WN32

#   define AV_WN32(p, v) AV_WN(32, p, v)

#endif

#ifndef AV_WN64

#   define AV_WN64(p, v) AV_WN(64, p, v)

#endif

#if HAVE_BIGENDIAN

#   define AV_RB(s, p)    AV_RN##s(p)

#   define AV_WB(s, p, v) AV_WN##s(p, v)

#   define AV_RL(s, p)    bswap_##s(AV_RN##s(p))

#   define AV_WL(s, p, v) AV_WN##s(p, bswap_##s(v))

#else

#   define AV_RB(s, p)    bswap_##s(AV_RN##s(p))

#   define AV_WB(s, p, v) AV_WN##s(p, bswap_##s(v))

#   define AV_RL(s, p)    AV_RN##s(p)

#   define AV_WL(s, p, v) AV_WN##s(p, v)

#endif

#define AV_RB8(x)     (((const uint8_t*)(x))[0])

#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)

#define AV_RL8(x)     AV_RB8(x)

#define AV_WL8(p, d)  AV_WB8(p, d)

#ifndef AV_RB16

#   define AV_RB16(p)    AV_RB(16, p)

#endif

#ifndef AV_WB16

#   define AV_WB16(p, v) AV_WB(16, p, v)

#endif

#ifndef AV_RL16

#   define AV_RL16(p)    AV_RL(16, p)

#endif

#ifndef AV_WL16

#   define AV_WL16(p, v) AV_WL(16, p, v)

#endif

#ifndef AV_RB32

#   define AV_RB32(p)    AV_RB(32, p)

#endif

#ifndef AV_WB32

#   define AV_WB32(p, v) AV_WB(32, p, v)

#endif

#ifndef AV_RL32

#   define AV_RL32(p)    AV_RL(32, p)

#endif

#ifndef AV_WL32

#   define AV_WL32(p, v) AV_WL(32, p, v)

#endif

#ifndef AV_RB64

#   define AV_RB64(p)    AV_RB(64, p)

#endif

#ifndef AV_WB64

#   define AV_WB64(p, v) AV_WB(64, p, v)

#endif

#ifndef AV_RL64

#   define AV_RL64(p)    AV_RL(64, p)

#endif

#ifndef AV_WL64

#   define AV_WL64(p, v) AV_WL(64, p, v)

#endif

#ifndef AV_RB24

#define AV_RB24(x)  ((((const uint8_t*)(x))[0] << 16) | \

                     (((const uint8_t*)(x))[1] <<  8) | \

                      ((const uint8_t*)(x))[2])

#endif

#ifndef AV_WB24

#define AV_WB24(p, d) do { \

                    ((uint8_t*)(p))[2] = (d); \

                    ((uint8_t*)(p))[1] = (d)>>8; \

                    ((uint8_t*)(p))[0] = (d)>>16; } while(0)

#endif

#ifndef AV_RL24

#define AV_RL24(x)  ((((const uint8_t*)(x))[2] << 16) | \

                     (((const uint8_t*)(x))[1] <<  8) | \

                      ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL24

#define AV_WL24(p, d) do { \

                    ((uint8_t*)(p))[0] = (d); \

                    ((uint8_t*)(p))[1] = (d)>>8; \

                    ((uint8_t*)(p))[2] = (d)>>16; } while(0)

#endif

#endif /* AVUTIL_INTREADWRITE_H */