+
−/*
+
− * 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 */