From 69db01e72f2de91d35703919bfc9d0700df83e85 Mon Sep 17 00:00:00 2001 From: Dave Chapman Date: Sat, 9 May 2009 01:04:20 +0000 Subject: Initial commit of the minimal set of ffmpeg (r18079) files required for Cook (realaudio) decoding. These are the unmodified versions from ffmpeg, committed as a base for future changes. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20882 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libcook/libavutil/bswap.h | 99 +++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 apps/codecs/libcook/libavutil/bswap.h (limited to 'apps/codecs/libcook/libavutil/bswap.h') diff --git a/apps/codecs/libcook/libavutil/bswap.h b/apps/codecs/libcook/libavutil/bswap.h new file mode 100644 index 0000000000..cf68c43c72 --- /dev/null +++ b/apps/codecs/libcook/libavutil/bswap.h @@ -0,0 +1,99 @@ +/* + * copyright (c) 2006 Michael Niedermayer + * + * 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 + */ + +/** + * @file libavutil/bswap.h + * byte swapping routines + */ + +#ifndef AVUTIL_BSWAP_H +#define AVUTIL_BSWAP_H + +#include +#include "config.h" +#include "common.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 */ -- cgit v1.2.3