| /* |
| * 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 */ |
