mpeg4ip_byteswap.h
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:3k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /**
- * Copyright (C) 2000, 2001 Billy Biggs <vektor@dumbterm.net>,
- * Han Hjort <d95hjort@dtek.chalmers.se>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #ifndef BSWAP_H_INCLUDED
- #define BSWAP_H_INCLUDED
- #ifdef _WIN32
- #include <config.h>
- #endif
- #if defined(WORDS_BIGENDIAN)
- /* All bigendian systems are fine, just ignore the swaps. */
- #define B2N_16(x) (void)(x)
- #define B2N_32(x) (void)(x)
- #define B2N_64(x) (void)(x)
- #else
- #if defined(__linux__)
- #include <byteswap.h>
- #define B2N_16(x) x = bswap_16(x)
- #define B2N_32(x) x = bswap_32(x)
- #define B2N_64(x) x = bswap_64(x)
- #elif defined(__NetBSD__)
- #include <sys/endian.h>
- #define B2N_16(x) BE16TOH(x)
- #define B2N_32(x) BE32TOH(x)
- #define B2N_64(x) BE64TOH(x)
- #elif defined(__OpenBSD__)
- #include <sys/endian.h>
- #define B2N_16(x) x = swap16(x)
- #define B2N_32(x) x = swap32(x)
- #define B2N_64(x) x = swap64(x)
- /* This is a slow but portable implementation, it has multiple evaluation
- * problems so beware.
- * FreeBSD and Solaris don't have <byteswap.h> or any other such
- * functionality!
- */
- #elif defined(__FreeBSD__) || defined(__sun) || defined(__bsdi__) || defined(_WIN32)
- #define B2N_16(x)
- x = ((((x) & 0xff00) >> 8) |
- (((x) & 0x00ff) << 8))
- #define B2N_32(x)
- x = ((((x) & 0xff000000) >> 24) |
- (((x) & 0x00ff0000) >> 8) |
- (((x) & 0x0000ff00) << 8) |
- (((x) & 0x000000ff) << 24))
- #define B2N_64(x)
- x = ((((x) & 0xff00000000000000) >> 56) |
- (((x) & 0x00ff000000000000) >> 40) |
- (((x) & 0x0000ff0000000000) >> 24) |
- (((x) & 0x000000ff00000000) >> 8) |
- (((x) & 0x00000000ff000000) << 8) |
- (((x) & 0x0000000000ff0000) << 24) |
- (((x) & 0x000000000000ff00) << 40) |
- (((x) & 0x00000000000000ff) << 56))
- #else
- /* If there isn't a header provided with your system with this functionality
- * add the relevant || define( ) to the portable implementation above.
- */
- #error "You need to add endian swap macros for you're system"
- #endif
- #endif /* WORDS_BIGENDIAN */
- #endif /* BSWAP_H_INCLUDED */