OpenJPEG 2.1.0
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00001 /* 00002 * The copyright in this software is being made available under the 2-clauses 00003 * BSD License, included below. This software may be subject to other third 00004 * party and contributor rights, including patent rights, and no such rights 00005 * are granted under this license. 00006 * 00007 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium 00008 * Copyright (c) 2002-2014, Professor Benoit Macq 00009 * Copyright (c) 2001-2003, David Janssens 00010 * Copyright (c) 2002-2003, Yannick Verschueren 00011 * Copyright (c) 2003-2007, Francois-Olivier Devaux 00012 * Copyright (c) 2003-2014, Antonin Descampe 00013 * Copyright (c) 2005, Herve Drolon, FreeImage Team 00014 * All rights reserved. 00015 * 00016 * Redistribution and use in source and binary forms, with or without 00017 * modification, are permitted provided that the following conditions 00018 * are met: 00019 * 1. Redistributions of source code must retain the above copyright 00020 * notice, this list of conditions and the following disclaimer. 00021 * 2. Redistributions in binary form must reproduce the above copyright 00022 * notice, this list of conditions and the following disclaimer in the 00023 * documentation and/or other materials provided with the distribution. 00024 * 00025 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' 00026 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00027 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00028 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00029 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00030 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00031 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00032 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00033 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00034 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00035 * POSSIBILITY OF SUCH DAMAGE. 00036 */ 00037 #ifndef __INT_H 00038 #define __INT_H 00039 00048 00051 /* ----------------------------------------------------------------------- */ 00056 static INLINE OPJ_INT32 opj_int_min(OPJ_INT32 a, OPJ_INT32 b) { 00057 return a < b ? a : b; 00058 } 00059 00064 static INLINE OPJ_UINT32 opj_uint_min(OPJ_UINT32 a, OPJ_UINT32 b) { 00065 return a < b ? a : b; 00066 } 00067 00072 static INLINE OPJ_INT32 opj_int_max(OPJ_INT32 a, OPJ_INT32 b) { 00073 return (a > b) ? a : b; 00074 } 00075 00080 static INLINE OPJ_UINT32 opj_uint_max(OPJ_UINT32 a, OPJ_UINT32 b) { 00081 return (a > b) ? a : b; 00082 } 00083 00093 static INLINE OPJ_INT32 opj_int_clamp(OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max) { 00094 if (a < min) 00095 return min; 00096 if (a > max) 00097 return max; 00098 return a; 00099 } 00103 static INLINE OPJ_INT32 opj_int_abs(OPJ_INT32 a) { 00104 return a < 0 ? -a : a; 00105 } 00110 static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b) { 00111 assert(b); 00112 return (a + b - 1) / b; 00113 } 00114 00119 static INLINE OPJ_UINT32 opj_uint_ceildiv(OPJ_UINT32 a, OPJ_UINT32 b) { 00120 return (a + b - 1) / b; 00121 } 00122 00127 static INLINE OPJ_INT32 opj_int_ceildivpow2(OPJ_INT32 a, OPJ_INT32 b) { 00128 return (OPJ_INT32)((a + (OPJ_INT64)(1 << b) - 1) >> b); 00129 } 00134 static INLINE OPJ_INT32 opj_int_floordivpow2(OPJ_INT32 a, OPJ_INT32 b) { 00135 return a >> b; 00136 } 00141 static INLINE OPJ_INT32 opj_int_floorlog2(OPJ_INT32 a) { 00142 OPJ_INT32 l; 00143 for (l = 0; a > 1; l++) { 00144 a >>= 1; 00145 } 00146 return l; 00147 } 00152 static INLINE OPJ_UINT32 opj_uint_floorlog2(OPJ_UINT32 a) { 00153 OPJ_UINT32 l; 00154 for (l = 0; a > 1; ++l) 00155 { 00156 a >>= 1; 00157 } 00158 return l; 00159 } 00160 00167 static INLINE OPJ_INT32 opj_int_fix_mul(OPJ_INT32 a, OPJ_INT32 b) { 00168 OPJ_INT64 temp = (OPJ_INT64) a * (OPJ_INT64) b ; 00169 temp += temp & 4096; 00170 return (OPJ_INT32) (temp >> 13) ; 00171 } 00172 00173 /* ----------------------------------------------------------------------- */ 00177 00178 #endif