/*

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

 *

 * This file is part of Libav.

 *

 * Libav 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.

 *

 * Libav 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 Libav; 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_ARM

#   include "arm/bswap.h"

#elif ARCH_AVR32

#   include "avr32/bswap.h"

#elif ARCH_BFIN

#   include "bfin/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 */