/*
  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  *

  * 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
  */
 

 /**

  * @file

  * byte swapping routines

  */
 

 #ifndef AVUTIL_BSWAP_H
 #define AVUTIL_BSWAP_H

 #include <stdint.h>

 #include "libavutil/avconfig.h"

 #include "attributes.h"

 #ifdef HAVE_AV_CONFIG_H
 
 #include "config.h"
 

 #if   ARCH_AARCH64
 #   include "aarch64/bswap.h"
 #elif ARCH_ARM

 #   include "arm/bswap.h"

 #elif ARCH_AVR32
 #   include "avr32/bswap.h"

 #elif ARCH_SH4

 #   include "sh4/bswap.h"

 #elif ARCH_X86

 #   include "x86/bswap.h"
 #endif
 

 #endif /* HAVE_AV_CONFIG_H */
 

 #define AV_BSWAP16C(x) (((x) << 8 & 0xff00)  | ((x) >> 8 & 0x00ff))

 #define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
 #define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))

 
 #define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
 

 #ifndef av_bswap16
 static av_always_inline av_const uint16_t av_bswap16(uint16_t x)

 {

     x= (x>>8) | (x<<8);

     return x;
 }

 #endif

 #ifndef av_bswap32
 static av_always_inline av_const uint32_t av_bswap32(uint32_t x)

 {

     return AV_BSWAP32C(x);

 }

 #endif

 #ifndef av_bswap64
 static inline uint64_t av_const av_bswap64(uint64_t x)

 {

     return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);

 }

 #endif

 // be2ne ... big-endian to native-endian
 // le2ne ... little-endian to native-endian

 #if AV_HAVE_BIGENDIAN

 #define av_be2ne16(x) (x)
 #define av_be2ne32(x) (x)
 #define av_be2ne64(x) (x)
 #define av_le2ne16(x) av_bswap16(x)
 #define av_le2ne32(x) av_bswap32(x)
 #define av_le2ne64(x) av_bswap64(x)

 #define AV_BE2NEC(s, x) (x)
 #define AV_LE2NEC(s, x) AV_BSWAPC(s, x)

 #else

 #define av_be2ne16(x) av_bswap16(x)
 #define av_be2ne32(x) av_bswap32(x)
 #define av_be2ne64(x) av_bswap64(x)
 #define av_le2ne16(x) (x)
 #define av_le2ne32(x) (x)
 #define av_le2ne64(x) (x)

 #define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
 #define AV_LE2NEC(s, x) (x)

 #endif
 

 #define AV_BE2NE16C(x) AV_BE2NEC(16, x)
 #define AV_BE2NE32C(x) AV_BE2NEC(32, x)
 #define AV_BE2NE64C(x) AV_BE2NEC(64, x)
 #define AV_LE2NE16C(x) AV_LE2NEC(16, x)
 #define AV_LE2NE32C(x) AV_LE2NEC(32, x)
 #define AV_LE2NE64C(x) AV_LE2NEC(64, x)

 #endif /* AVUTIL_BSWAP_H */