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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * copyright (c) 2006 Michael Niedermayer |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * byte swapping routines |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef AVUTIL_BSWAP_H |
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| 27 | #define AVUTIL_BSWAP_H |
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| 28 | |||
| 29 | #include |
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| 30 | #include "libavutil/avconfig.h" |
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| 31 | #include "attributes.h" |
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| 32 | |||
| 33 | #ifdef HAVE_AV_CONFIG_H |
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| 34 | |||
| 35 | #include "config.h" |
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| 36 | |||
| 37 | #if ARCH_ARM |
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| 38 | # include "arm/bswap.h" |
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| 39 | #elif ARCH_AVR32 |
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| 40 | # include "avr32/bswap.h" |
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| 41 | #elif ARCH_BFIN |
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| 42 | # include "bfin/bswap.h" |
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| 43 | #elif ARCH_SH4 |
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| 44 | # include "sh4/bswap.h" |
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| 45 | #elif ARCH_X86 |
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| 46 | # include "x86/bswap.h" |
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| 47 | #endif |
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| 48 | |||
| 49 | #endif /* HAVE_AV_CONFIG_H */ |
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| 50 | |||
| 51 | #define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff)) |
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| 52 | #define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16)) |
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| 53 | #define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32)) |
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| 54 | |||
| 55 | #define AV_BSWAPC(s, x) AV_BSWAP##s##C(x) |
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| 56 | |||
| 57 | #ifndef av_bswap16 |
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| 58 | static av_always_inline av_const uint16_t av_bswap16(uint16_t x) |
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| 59 | { |
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| 60 | x= (x>>8) | (x<<8); |
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| 61 | return x; |
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| 62 | } |
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| 63 | #endif |
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| 64 | |||
| 65 | #ifndef av_bswap32 |
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| 66 | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) |
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| 67 | { |
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| 68 | return AV_BSWAP32C(x); |
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| 69 | } |
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| 70 | #endif |
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| 71 | |||
| 72 | #ifndef av_bswap64 |
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| 73 | static inline uint64_t av_const av_bswap64(uint64_t x) |
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| 74 | { |
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| 75 | return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32); |
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| 76 | } |
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| 77 | #endif |
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| 78 | |||
| 79 | // be2ne ... big-endian to native-endian |
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| 80 | // le2ne ... little-endian to native-endian |
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| 81 | |||
| 82 | #if AV_HAVE_BIGENDIAN |
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| 83 | #define av_be2ne16(x) (x) |
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| 84 | #define av_be2ne32(x) (x) |
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| 85 | #define av_be2ne64(x) (x) |
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| 86 | #define av_le2ne16(x) av_bswap16(x) |
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| 87 | #define av_le2ne32(x) av_bswap32(x) |
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| 88 | #define av_le2ne64(x) av_bswap64(x) |
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| 89 | #define AV_BE2NEC(s, x) (x) |
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| 90 | #define AV_LE2NEC(s, x) AV_BSWAPC(s, x) |
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| 91 | #else |
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| 92 | #define av_be2ne16(x) av_bswap16(x) |
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| 93 | #define av_be2ne32(x) av_bswap32(x) |
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| 94 | #define av_be2ne64(x) av_bswap64(x) |
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| 95 | #define av_le2ne16(x) (x) |
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| 96 | #define av_le2ne32(x) (x) |
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| 97 | #define av_le2ne64(x) (x) |
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| 98 | #define AV_BE2NEC(s, x) AV_BSWAPC(s, x) |
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| 99 | #define AV_LE2NEC(s, x) (x) |
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| 100 | #endif |
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| 101 | |||
| 102 | #define AV_BE2NE16C(x) AV_BE2NEC(16, x) |
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| 103 | #define AV_BE2NE32C(x) AV_BE2NEC(32, x) |
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| 104 | #define AV_BE2NE64C(x) AV_BE2NEC(64, x) |
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| 105 | #define AV_LE2NE16C(x) AV_LE2NEC(16, x) |
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| 106 | #define AV_LE2NE32C(x) AV_LE2NEC(32, x) |
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| 107 | #define AV_LE2NE64C(x) AV_LE2NEC(64, x) |
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| 108 | |||
| 109 | #endif /* AVUTIL_BSWAP_H */ |