2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
75 static inline uint64_t av_const av_bswap64(uint64_t x)
78 x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
79 x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
80 return (x>>32) | (x<<32);
87 r.l[0] = av_bswap32 (w.l[1]);
88 r.l[1] = av_bswap32 (w.l[0]);
94 // be2ne ... big-endian to native-endian
95 // le2ne ... little-endian to native-endian
98 #define av_be2ne16(x) (x)
99 #define av_be2ne32(x) (x)
100 #define av_be2ne64(x) (x)
101 #define av_le2ne16(x) av_bswap16(x)
102 #define av_le2ne32(x) av_bswap32(x)
103 #define av_le2ne64(x) av_bswap64(x)
104 #define AV_BE2NEC(s, x) (x)
105 #define AV_LE2NEC(s, x) AV_BSWAPC(s, x)
107 #define av_be2ne16(x) av_bswap16(x)
108 #define av_be2ne32(x) av_bswap32(x)
109 #define av_be2ne64(x) av_bswap64(x)
110 #define av_le2ne16(x) (x)
111 #define av_le2ne32(x) (x)
112 #define av_le2ne64(x) (x)
113 #define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
114 #define AV_LE2NEC(s, x) (x)
117 #define AV_BE2NE16C(x) AV_BE2NEC(16, x)
118 #define AV_BE2NE32C(x) AV_BE2NEC(32, x)
119 #define AV_BE2NE64C(x) AV_BE2NEC(64, x)
120 #define AV_LE2NE16C(x) AV_LE2NEC(16, x)
121 #define AV_LE2NE32C(x) AV_LE2NEC(32, x)
122 #define AV_LE2NE64C(x) AV_LE2NEC(64, x)
124 #endif /* AVUTIL_BSWAP_H */