blob: 91cb79538dc2fb5979df88ce5e8279ec80170600
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_AARCH64 |
38 | # include "aarch64/bswap.h" |
39 | #elif ARCH_ARM |
40 | # include "arm/bswap.h" |
41 | #elif ARCH_AVR32 |
42 | # include "avr32/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 */ |
110 |