/* * 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 bswap.h * byte swapping routines */ #ifndef AVUTIL_BSWAP_H #define AVUTIL_BSWAP_H #include <stdint.h> #include "config.h" #include "common.h" #if defined(ARCH_ARM) # include "arm/bswap.h" #elif defined(ARCH_BFIN) # include "bfin/bswap.h" #elif defined(ARCH_SH4) # include "sh4/bswap.h" #elif defined(ARCH_X86) # include "x86/bswap.h" #endif #ifndef bswap_16 static av_always_inline av_const uint16_t bswap_16(uint16_t x) { x= (x>>8) | (x<<8); return x; } #endif #ifndef bswap_32 static av_always_inline av_const uint32_t bswap_32(uint32_t x) { x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF); x= (x>>16) | (x<<16); return x; } #endif #ifndef bswap_64 static inline uint64_t av_const bswap_64(uint64_t x) { #if 0 x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL); x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL); return (x>>32) | (x<<32); #else union { uint64_t ll; uint32_t l[2]; } w, r; w.ll = x; r.l[0] = bswap_32 (w.l[1]); r.l[1] = bswap_32 (w.l[0]); return r.ll; #endif } #endif // be2me ... BigEndian to MachineEndian // le2me ... LittleEndian to MachineEndian #ifdef WORDS_BIGENDIAN #define be2me_16(x) (x) #define be2me_32(x) (x) #define be2me_64(x) (x) #define le2me_16(x) bswap_16(x) #define le2me_32(x) bswap_32(x) #define le2me_64(x) bswap_64(x) #else #define be2me_16(x) bswap_16(x) #define be2me_32(x) bswap_32(x) #define be2me_64(x) bswap_64(x) #define le2me_16(x) (x) #define le2me_32(x) (x) #define le2me_64(x) (x) #endif #endif /* AVUTIL_BSWAP_H */