diff options
| author | Antonin Descampe <antonin@gmail.com> | 2011-04-16 11:37:59 +0000 |
|---|---|---|
| committer | Antonin Descampe <antonin@gmail.com> | 2011-04-16 11:37:59 +0000 |
| commit | 2e2f7f2a9b4d6267a2dcfe58c3235c804e54eaef (patch) | |
| tree | 35a4778c5af7e07d2e94315b58ca2bf1add07fe1 /libopenjp3d/fix.h | |
| parent | 619439f45d6a59781d4da1aedf74743a9ebe7cfe (diff) | |
renamed "openjpeg3d" in "openjp3d" (step 3)
Diffstat (limited to 'libopenjp3d/fix.h')
| -rwxr-xr-x | libopenjp3d/fix.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/libopenjp3d/fix.h b/libopenjp3d/fix.h new file mode 100755 index 00000000..3b5e77ca --- /dev/null +++ b/libopenjp3d/fix.h @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef __FIX_H +#define __FIX_H + +#if defined(_MSC_VER) || defined(__BORLANDC__) +#define int64 __int64 +#else +#define int64 long long +#endif + +/** +@file fix.h +@brief Implementation of operations of specific multiplication (FIX) + +The functions in FIX.H have for goal to realize specific multiplication. +*/ + +/** @defgroup FIX FIX - Implementation of operations of specific multiplication */ +/*@{*/ + +/** +Multiply two fixed-precision rational numbers. +@param a +@param b +@return Returns a * b +*/ +static int fix_mul(int a, int b) { + int64 temp = (int64) a * (int64) b >> 12; + return (int) ((temp >> 1) + (temp & 1)) ; +} + +/*@}*/ + +#endif /* __FIX_H */ |
