repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 */ |