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| | | /* |
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| | | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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| | | * |
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| | | * This file is part of FFmpeg. |
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| | | * |
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| | | * FFmpeg is free software; you can redistribute it and/or |
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| | | * modify it under the terms of the GNU Lesser General Public |
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| | | * License as published by the Free Software Foundation; either |
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| | | * version 2.1 of the License, or (at your option) any later version. |
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| | | * |
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| | | * FFmpeg is distributed in the hope that it will be useful, |
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| | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| | | * Lesser General Public License for more details. |
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| | | * |
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| | | * You should have received a copy of the GNU Lesser General Public |
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| | | * License along with FFmpeg; if not, write to the Free Software |
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| | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| | | */ |
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| | | |
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| | | /** |
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| | | * @file |
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| | | * byte swapping routines |
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| | | */ |
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| | | |
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| | | #ifndef AVUTIL_BSWAP_H |
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| | | #define AVUTIL_BSWAP_H |
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| | | |
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| | | #include <stdint.h> |
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| | | #include "libavutil/avconfig.h" |
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| | | #include "attributes.h" |
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| | | |
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| | | #ifdef HAVE_AV_CONFIG_H |
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| | | |
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| | | #include "config.h" |
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| | | |
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| | | #if ARCH_AARCH64 |
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| | | # include "aarch64/bswap.h" |
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| | | #elif ARCH_ARM |
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| | | # include "arm/bswap.h" |
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| | | #elif ARCH_AVR32 |
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| | | # include "avr32/bswap.h" |
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| | | #elif ARCH_SH4 |
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| | | # include "sh4/bswap.h" |
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| | | #elif ARCH_X86 |
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| | | # include "x86/bswap.h" |
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| | | #endif |
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| | | |
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| | | #endif /* HAVE_AV_CONFIG_H */ |
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| | | |
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| | | #define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff)) |
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| | | #define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16)) |
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| | | #define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32)) |
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| | | |
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| | | #define AV_BSWAPC(s, x) AV_BSWAP##s##C(x) |
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| | | |
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| | | #ifndef av_bswap16 |
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| | | static av_always_inline av_const uint16_t av_bswap16(uint16_t x) |
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| | | { |
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| | | x= (x>>8) | (x<<8); |
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| | | return x; |
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| | | } |
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| | | #endif |
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| | | |
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| | | #ifndef av_bswap32 |
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| | | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) |
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| | | { |
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| | | return AV_BSWAP32C(x); |
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| | | } |
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| | | #endif |
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| | | |
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| | | #ifndef av_bswap64 |
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| | | static inline uint64_t av_const av_bswap64(uint64_t x) |
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| | | { |
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| | | return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32); |
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| | | } |
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| | | #endif |
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| | | |
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| | | // be2ne ... big-endian to native-endian |
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| | | // le2ne ... little-endian to native-endian |
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| | | |
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| | | #if AV_HAVE_BIGENDIAN |
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| | | #define av_be2ne16(x) (x) |
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| | | #define av_be2ne32(x) (x) |
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| | | #define av_be2ne64(x) (x) |
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| | | #define av_le2ne16(x) av_bswap16(x) |
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| | | #define av_le2ne32(x) av_bswap32(x) |
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| | | #define av_le2ne64(x) av_bswap64(x) |
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| | | #define AV_BE2NEC(s, x) (x) |
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| | | #define AV_LE2NEC(s, x) AV_BSWAPC(s, x) |
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| | | #else |
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| | | #define av_be2ne16(x) av_bswap16(x) |
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| | | #define av_be2ne32(x) av_bswap32(x) |
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| | | #define av_be2ne64(x) av_bswap64(x) |
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| | | #define av_le2ne16(x) (x) |
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| | | #define av_le2ne32(x) (x) |
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| | | #define av_le2ne64(x) (x) |
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| | | #define AV_BE2NEC(s, x) AV_BSWAPC(s, x) |
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| | | #define AV_LE2NEC(s, x) (x) |
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| | | #endif |
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| | | |
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| | | #define AV_BE2NE16C(x) AV_BE2NEC(16, x) |
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| | | #define AV_BE2NE32C(x) AV_BE2NEC(32, x) |
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| | | #define AV_BE2NE64C(x) AV_BE2NEC(64, x) |
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| | | #define AV_LE2NE16C(x) AV_LE2NEC(16, x) |
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| | | #define AV_LE2NE32C(x) AV_LE2NEC(32, x) |
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| | | #define AV_LE2NE64C(x) AV_LE2NEC(64, x) |
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| | | |
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| | | #endif /* AVUTIL_BSWAP_H */ |
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