Mercurial > mm7

comparison lib/libavutil/bswap.h @ 2134:992d2e6f907d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
parents
children
comparison
equal deleted inserted replaced
2133:e378232bfd36 2134:992d2e6f907d
1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * byte swapping routines
24 */
25
26 #ifndef AVUTIL_BSWAP_H
27 #define AVUTIL_BSWAP_H
28
29 #include <stdint.h>
30 #include "libavutil/avconfig.h"
31 #include "attributes.h"
32
33 #ifdef HAVE_AV_CONFIG_H
34
35 #include "config.h"
36
37 #if ARCH_ARM
38 # include "arm/bswap.h"
39 #elif ARCH_AVR32
40 # include "avr32/bswap.h"
41 #elif ARCH_BFIN
42 # include "bfin/bswap.h"
43 #elif ARCH_SH4
44 # include "sh4/bswap.h"
45 #elif ARCH_X86
46 # include "x86/bswap.h"
47 #endif
48
49 #endif /* HAVE_AV_CONFIG_H */
50
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))
54
55 #define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
56
57 #ifndef av_bswap16
58 static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
59 {
60 x= (x>>8) | (x<<8);
61 return x;
62 }
63 #endif
64
65 #ifndef av_bswap32
66 static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
67 {
68 return AV_BSWAP32C(x);
69 }
70 #endif
71
72 #ifndef av_bswap64
73 static inline uint64_t av_const av_bswap64(uint64_t x)
74 {
75 return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
76 }
77 #endif
78
79 // be2ne ... big-endian to native-endian
80 // le2ne ... little-endian to native-endian
81
82 #if AV_HAVE_BIGENDIAN
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)
91 #else
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)
100 #endif
101
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)
108
109 #endif /* AVUTIL_BSWAP_H */