2
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4
* This file is part of Libav.
6
* Libav is free software; you can redistribute it and/or
7
* modify it under the terms of the GNU Lesser General Public
8
* License as published by the Free Software Foundation; either
9
* version 2.1 of the License, or (at your option) any later version.
11
* Libav is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
* Lesser General Public License for more details.
16
* You should have received a copy of the GNU Lesser General Public
17
* License along with Libav; if not, write to the Free Software
18
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23
* byte swapping routines
26
#ifndef AVUTIL_BSWAP_H
27
#define AVUTIL_BSWAP_H
30
#include "libavutil/avconfig.h"
31
#include "attributes.h"
33
#ifdef HAVE_AV_CONFIG_H
38
# include "arm/bswap.h"
40
# include "avr32/bswap.h"
42
# include "bfin/bswap.h"
44
# include "sh4/bswap.h"
46
# include "x86/bswap.h"
49
#endif /* HAVE_AV_CONFIG_H */
51
#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
52
#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
53
#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
55
#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
58
static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
66
static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
68
return AV_BSWAP32C(x);
73
static inline uint64_t av_const av_bswap64(uint64_t x)
75
return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
79
// be2ne ... big-endian to native-endian
80
// le2ne ... little-endian to native-endian
83
#define av_be2ne16(x) (x)
84
#define av_be2ne32(x) (x)
85
#define av_be2ne64(x) (x)
86
#define av_le2ne16(x) av_bswap16(x)
87
#define av_le2ne32(x) av_bswap32(x)
88
#define av_le2ne64(x) av_bswap64(x)
89
#define AV_BE2NEC(s, x) (x)
90
#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
92
#define av_be2ne16(x) av_bswap16(x)
93
#define av_be2ne32(x) av_bswap32(x)
94
#define av_be2ne64(x) av_bswap64(x)
95
#define av_le2ne16(x) (x)
96
#define av_le2ne32(x) (x)
97
#define av_le2ne64(x) (x)
98
#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
99
#define AV_LE2NEC(s, x) (x)
102
#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
103
#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
104
#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
105
#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
106
#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
107
#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
109
#endif /* AVUTIL_BSWAP_H */