1/* 2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * byte swapping routines 24 */ 25 26#ifndef AVUTIL_BSWAP_H 27#define AVUTIL_BSWAP_H 28 29#include <stdint.h> 30#include "libavutil/avconfig.h" 31#include "attributes.h" 32 33#ifdef HAVE_AV_CONFIG_H 34 35#include "config.h" 36 37#if ARCH_AARCH64 38# include "aarch64/bswap.h" 39#elif ARCH_ARM 40# include "arm/bswap.h" 41#elif ARCH_AVR32 42# include "avr32/bswap.h" 43#elif ARCH_BFIN 44# include "bfin/bswap.h" 45#elif ARCH_SH4 46# include "sh4/bswap.h" 47#elif ARCH_X86 48# include "x86/bswap.h" 49#endif 50 51#endif /* HAVE_AV_CONFIG_H */ 52 53#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff)) 54#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16)) 55#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32)) 56 57#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x) 58 59#ifndef av_bswap16 60static av_always_inline av_const uint16_t av_bswap16(uint16_t x) 61{ 62 x= (x>>8) | (x<<8); 63 return x; 64} 65#endif 66 67#ifndef av_bswap32 68static av_always_inline av_const uint32_t av_bswap32(uint32_t x) 69{ 70 return AV_BSWAP32C(x); 71} 72#endif 73 74#ifndef av_bswap64 75static inline uint64_t av_const av_bswap64(uint64_t x) 76{ 77 return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32); 78} 79#endif 80 81// be2ne ... big-endian to native-endian 82// le2ne ... little-endian to native-endian 83 84#if AV_HAVE_BIGENDIAN 85#define av_be2ne16(x) (x) 86#define av_be2ne32(x) (x) 87#define av_be2ne64(x) (x) 88#define av_le2ne16(x) av_bswap16(x) 89#define av_le2ne32(x) av_bswap32(x) 90#define av_le2ne64(x) av_bswap64(x) 91#define AV_BE2NEC(s, x) (x) 92#define AV_LE2NEC(s, x) AV_BSWAPC(s, x) 93#else 94#define av_be2ne16(x) av_bswap16(x) 95#define av_be2ne32(x) av_bswap32(x) 96#define av_be2ne64(x) av_bswap64(x) 97#define av_le2ne16(x) (x) 98#define av_le2ne32(x) (x) 99#define av_le2ne64(x) (x) 100#define AV_BE2NEC(s, x) AV_BSWAPC(s, x) 101#define AV_LE2NEC(s, x) (x) 102#endif 103 104#define AV_BE2NE16C(x) AV_BE2NEC(16, x) 105#define AV_BE2NE32C(x) AV_BE2NEC(32, x) 106#define AV_BE2NE64C(x) AV_BE2NEC(64, x) 107#define AV_LE2NE16C(x) AV_LE2NEC(16, x) 108#define AV_LE2NE32C(x) AV_LE2NEC(32, x) 109#define AV_LE2NE64C(x) AV_LE2NEC(64, x) 110 111#endif /* AVUTIL_BSWAP_H */ 112