mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
|
|
* 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_ARM
|
|
# include "arm/bswap.h"
|
|
#elif ARCH_AVR32
|
|
# include "avr32/bswap.h"
|
|
#elif ARCH_BFIN
|
|
# include "bfin/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)
|
|
{
|
|
x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
|
|
x= (x>>16) | (x<<16);
|
|
return x;
|
|
}
|
|
#endif
|
|
|
|
#ifndef av_bswap64
|
|
static inline uint64_t av_const av_bswap64(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] = av_bswap32 (w.l[1]);
|
|
r.l[1] = av_bswap32 (w.l[0]);
|
|
return r.ll;
|
|
#endif
|
|
}
|
|
#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 */
|