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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 */><>8); |