diff options
Diffstat (limited to 'ffmpeg_files/bswap.h')
-rw-r--r-- | ffmpeg_files/bswap.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/ffmpeg_files/bswap.h b/ffmpeg_files/bswap.h new file mode 100644 index 0000000000..3bfa6aa631 --- /dev/null +++ b/ffmpeg_files/bswap.h @@ -0,0 +1,103 @@ +/* + * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + + +// This file in MPlayer is otherwise the same as in FFmpeg, except it +// includes "libavutil/common.h" instead of "common.h". + +/** + * @file libavutil/bswap.h + * byte swapping routines + */ + +#ifndef MP_AVUTIL_BSWAP_H +#define MP_AVUTIL_BSWAP_H + +#include <stdint.h> +#include "libavutil/common.h" +#include "config.h" + +#if ARCH_ARM +# include "arm/bswap.h" +#elif ARCH_BFIN +# include "bfin/bswap.h" +#elif ARCH_SH4 +# include "sh4/bswap.h" +#elif ARCH_X86 +# include "x86/bswap.h" +#endif + +#ifndef bswap_16 +static av_always_inline av_const uint16_t bswap_16(uint16_t x) +{ + x= (x>>8) | (x<<8); + return x; +} +#endif + +#ifndef bswap_32 +static av_always_inline av_const uint32_t bswap_32(uint32_t x) +{ + x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF); + x= (x>>16) | (x<<16); + return x; +} +#endif + +#ifndef bswap_64 +static inline uint64_t av_const bswap_64(uint64_t x) +{ +#if 0 + x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL); + x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL); + return (x>>32) | (x<<32); +#else + union { + uint64_t ll; + uint32_t l[2]; + } w, r; + w.ll = x; + r.l[0] = bswap_32 (w.l[1]); + r.l[1] = bswap_32 (w.l[0]); + return r.ll; +#endif +} +#endif + +// be2me ... big-endian to machine-endian +// le2me ... little-endian to machine-endian + +#ifdef WORDS_BIGENDIAN +#define be2me_16(x) (x) +#define be2me_32(x) (x) +#define be2me_64(x) (x) +#define le2me_16(x) bswap_16(x) +#define le2me_32(x) bswap_32(x) +#define le2me_64(x) bswap_64(x) +#else +#define be2me_16(x) bswap_16(x) +#define be2me_32(x) bswap_32(x) +#define be2me_64(x) bswap_64(x) +#define le2me_16(x) (x) +#define le2me_32(x) (x) +#define le2me_64(x) (x) +#endif + +#endif /* AVUTIL_BSWAP_H */ |