mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.8 KiB
109 lines
2.8 KiB
/* |
|
* 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 */
|
|
|