Edit File: bswap.h
/* * 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 */