2 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
4 * Copyright (c) 2001-2003 Michael David Adams.
8 /* __START_OF_JASPER_LICENSE__
10 * JasPer License Version 2.0
12 * Copyright (c) 1999-2000 Image Power, Inc.
13 * Copyright (c) 1999-2000 The University of British Columbia
14 * Copyright (c) 2001-2003 Michael David Adams
16 * All rights reserved.
18 * Permission is hereby granted, free of charge, to any person (the
19 * "User") obtaining a copy of this software and associated documentation
20 * files (the "Software"), to deal in the Software without restriction,
21 * including without limitation the rights to use, copy, modify, merge,
22 * publish, distribute, and/or sell copies of the Software, and to permit
23 * persons to whom the Software is furnished to do so, subject to the
24 * following conditions:
26 * 1. The above copyright notices and this permission notice (which
27 * includes the disclaimer below) shall be included in all copies or
28 * substantial portions of the Software.
30 * 2. The name of a copyright holder shall not be used to endorse or
31 * promote products derived from the Software without specific prior
34 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
35 * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
36 * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
37 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
38 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
39 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
40 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
41 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
42 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
43 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
44 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
45 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
46 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
47 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
48 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
49 * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
50 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
51 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
52 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
53 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
54 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
55 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
56 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
57 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
58 * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
59 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
61 * __END_OF_JASPER_LICENSE__
65 * Multicomponent Transform Code
67 * $Id: jpc_mct.c,v 1.1 2005/05/22 18:33:04 malaterre Exp $
70 /******************************************************************************\
72 \******************************************************************************/
76 #include "jasper/jas_seq.h"
81 /******************************************************************************\
83 \******************************************************************************/
85 /* Compute the forward RCT. */
87 void jpc_rct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
97 numrows = jas_matrix_numrows(c0);
98 numcols = jas_matrix_numcols(c0);
100 /* All three matrices must have the same dimensions. */
101 assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
102 && jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
104 for (i = 0; i < numrows; i++) {
105 c0p = jas_matrix_getref(c0, i, 0);
106 c1p = jas_matrix_getref(c1, i, 0);
107 c2p = jas_matrix_getref(c2, i, 0);
108 for (j = numcols; j > 0; --j) {
118 y = (r + (g << 1) + b) >> 2;
128 /* Compute the inverse RCT. */
130 void jpc_irct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
140 numrows = jas_matrix_numrows(c0);
141 numcols = jas_matrix_numcols(c0);
143 /* All three matrices must have the same dimensions. */
144 assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
145 && jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
147 for (i = 0; i < numrows; i++) {
148 c0p = jas_matrix_getref(c0, i, 0);
149 c1p = jas_matrix_getref(c1, i, 0);
150 c2p = jas_matrix_getref(c2, i, 0);
151 for (j = numcols; j > 0; --j) {
161 g = y - ((u + v) >> 2);
171 void jpc_ict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
187 numrows = jas_matrix_numrows(c0);
188 assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
189 numcols = jas_matrix_numcols(c0);
190 assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
191 for (i = 0; i < numrows; ++i) {
192 c0p = jas_matrix_getref(c0, i, 0);
193 c1p = jas_matrix_getref(c1, i, 0);
194 c2p = jas_matrix_getref(c2, i, 0);
195 for (j = numcols; j > 0; --j) {
199 y = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.299), r), jpc_fix_mul(jpc_dbltofix(0.587), g),
200 jpc_fix_mul(jpc_dbltofix(0.114), b));
201 u = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(-0.16875), r), jpc_fix_mul(jpc_dbltofix(-0.33126), g),
202 jpc_fix_mul(jpc_dbltofix(0.5), b));
203 v = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.5), r), jpc_fix_mul(jpc_dbltofix(-0.41869), g),
204 jpc_fix_mul(jpc_dbltofix(-0.08131), b));
212 void jpc_iict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
228 numrows = jas_matrix_numrows(c0);
229 assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
230 numcols = jas_matrix_numcols(c0);
231 assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
232 for (i = 0; i < numrows; ++i) {
233 c0p = jas_matrix_getref(c0, i, 0);
234 c1p = jas_matrix_getref(c1, i, 0);
235 c2p = jas_matrix_getref(c2, i, 0);
236 for (j = numcols; j > 0; --j) {
240 r = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.402), v));
241 g = jpc_fix_add3(y, jpc_fix_mul(jpc_dbltofix(-0.34413), u),
242 jpc_fix_mul(jpc_dbltofix(-0.71414), v));
243 b = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.772), u));
251 jpc_fix_t jpc_mct_getsynweight(int mctid, int cmptno)
255 synweight = JPC_FIX_ONE;
260 synweight = jpc_dbltofix(sqrt(3.0));
263 synweight = jpc_dbltofix(sqrt(0.6875));
266 synweight = jpc_dbltofix(sqrt(0.6875));
273 synweight = jpc_dbltofix(sqrt(3.0000));
276 synweight = jpc_dbltofix(sqrt(3.2584));
279 synweight = jpc_dbltofix(sqrt(2.4755));
285 synweight = JPC_FIX_ONE;