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diff --git a/audio_codec/libflac/bswap.h b/audio_codec/libflac/bswap.h new file mode 100644 index 0000000..3614057 --- a/dev/null +++ b/audio_codec/libflac/bswap.h @@ -0,0 +1,94 @@ +/* + * 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 + */ + +/** + * @file libavutil/bswap.h + * byte swapping routines + */ + +#ifndef AVUTIL_BSWAP_H +#define AVUTIL_BSWAP_H + +#ifdef __MW__ +#define inline __inline +#include <core/types.h> +#else +#include <stdint.h> +#endif +#include "common.h" +#include <stdint.h> + +#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 + +#if HAVE_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 */ |