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+/*
+ * Copyright (c) 1999-2000 Image Power, Inc. and the University of
+ * British Columbia.
+ * Copyright (c) 2001-2003 Michael David Adams.
+ * All rights reserved.
+ */
+
+/* __START_OF_JASPER_LICENSE__
+ *
+ * JasPer License Version 2.0
+ *
+ * Copyright (c) 2001-2006 Michael David Adams
+ * Copyright (c) 1999-2000 Image Power, Inc.
+ * Copyright (c) 1999-2000 The University of British Columbia
+ *
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person (the
+ * "User") obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, and/or sell copies of the Software, and to permit
+ * persons to whom the Software is furnished to do so, subject to the
+ * following conditions:
+ *
+ * 1. The above copyright notices and this permission notice (which
+ * includes the disclaimer below) shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * 2. The name of a copyright holder shall not be used to endorse or
+ * promote products derived from the Software without specific prior
+ * written permission.
+ *
+ * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
+ * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+ * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
+ * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
+ * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
+ * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
+ * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
+ * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
+ * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
+ * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
+ * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
+ * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
+ * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
+ * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
+ * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
+ * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
+ * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
+ * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
+ * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
+ * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
+ * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
+ *
+ * __END_OF_JASPER_LICENSE__
+ */
+
+/*
+ * Multicomponent Transform Code
+ *
+ * $Id$
+ */
+
+/******************************************************************************\
+* Includes.
+\******************************************************************************/
+
+#include <assert.h>
+
+#include "jasper/jas_seq.h"
+
+#include "jpc_fix.h"
+#include "jpc_mct.h"
+
+/******************************************************************************\
+* Code.
+\******************************************************************************/
+
+/* Compute the forward RCT. */
+
+void jpc_rct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
+{
+ int numrows;
+ int numcols;
+ int i;
+ int j;
+ jpc_fix_t *c0p;
+ jpc_fix_t *c1p;
+ jpc_fix_t *c2p;
+
+ numrows = jas_matrix_numrows(c0);
+ numcols = jas_matrix_numcols(c0);
+
+ /* All three matrices must have the same dimensions. */
+ assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
+ && jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
+
+ for (i = 0; i < numrows; i++) {
+ c0p = jas_matrix_getref(c0, i, 0);
+ c1p = jas_matrix_getref(c1, i, 0);
+ c2p = jas_matrix_getref(c2, i, 0);
+ for (j = numcols; j > 0; --j) {
+ int r;
+ int g;
+ int b;
+ int y;
+ int u;
+ int v;
+ r = *c0p;
+ g = *c1p;
+ b = *c2p;
+ y = (r + (g << 1) + b) >> 2;
+ u = b - g;
+ v = r - g;
+ *c0p++ = y;
+ *c1p++ = u;
+ *c2p++ = v;
+ }
+ }
+}
+
+/* Compute the inverse RCT. */
+
+void jpc_irct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
+{
+ int numrows;
+ int numcols;
+ int i;
+ int j;
+ jpc_fix_t *c0p;
+ jpc_fix_t *c1p;
+ jpc_fix_t *c2p;
+
+ numrows = jas_matrix_numrows(c0);
+ numcols = jas_matrix_numcols(c0);
+
+ /* All three matrices must have the same dimensions. */
+ assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
+ && jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
+
+ for (i = 0; i < numrows; i++) {
+ c0p = jas_matrix_getref(c0, i, 0);
+ c1p = jas_matrix_getref(c1, i, 0);
+ c2p = jas_matrix_getref(c2, i, 0);
+ for (j = numcols; j > 0; --j) {
+ int r;
+ int g;
+ int b;
+ int y;
+ int u;
+ int v;
+ y = *c0p;
+ u = *c1p;
+ v = *c2p;
+ g = y - ((u + v) >> 2);
+ r = v + g;
+ b = u + g;
+ *c0p++ = r;
+ *c1p++ = g;
+ *c2p++ = b;
+ }
+ }
+}
+
+void jpc_ict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
+{
+ int numrows;
+ int numcols;
+ int i;
+ int j;
+ jpc_fix_t r;
+ jpc_fix_t g;
+ jpc_fix_t b;
+ jpc_fix_t y;
+ jpc_fix_t u;
+ jpc_fix_t v;
+ jpc_fix_t *c0p;
+ jpc_fix_t *c1p;
+ jpc_fix_t *c2p;
+
+ numrows = jas_matrix_numrows(c0);
+ assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
+ numcols = jas_matrix_numcols(c0);
+ assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
+ for (i = 0; i < numrows; ++i) {
+ c0p = jas_matrix_getref(c0, i, 0);
+ c1p = jas_matrix_getref(c1, i, 0);
+ c2p = jas_matrix_getref(c2, i, 0);
+ for (j = numcols; j > 0; --j) {
+ r = *c0p;
+ g = *c1p;
+ b = *c2p;
+ y = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.299), r), jpc_fix_mul(jpc_dbltofix(0.587), g),
+ jpc_fix_mul(jpc_dbltofix(0.114), b));
+ u = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(-0.16875), r), jpc_fix_mul(jpc_dbltofix(-0.33126), g),
+ jpc_fix_mul(jpc_dbltofix(0.5), b));
+ v = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.5), r), jpc_fix_mul(jpc_dbltofix(-0.41869), g),
+ jpc_fix_mul(jpc_dbltofix(-0.08131), b));
+ *c0p++ = y;
+ *c1p++ = u;
+ *c2p++ = v;
+ }
+ }
+}
+
+void jpc_iict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
+{
+ int numrows;
+ int numcols;
+ int i;
+ int j;
+ jpc_fix_t r;
+ jpc_fix_t g;
+ jpc_fix_t b;
+ jpc_fix_t y;
+ jpc_fix_t u;
+ jpc_fix_t v;
+ jpc_fix_t *c0p;
+ jpc_fix_t *c1p;
+ jpc_fix_t *c2p;
+
+ numrows = jas_matrix_numrows(c0);
+ assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
+ numcols = jas_matrix_numcols(c0);
+ assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
+ for (i = 0; i < numrows; ++i) {
+ c0p = jas_matrix_getref(c0, i, 0);
+ c1p = jas_matrix_getref(c1, i, 0);
+ c2p = jas_matrix_getref(c2, i, 0);
+ for (j = numcols; j > 0; --j) {
+ y = *c0p;
+ u = *c1p;
+ v = *c2p;
+ r = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.402), v));
+ g = jpc_fix_add3(y, jpc_fix_mul(jpc_dbltofix(-0.34413), u),
+ jpc_fix_mul(jpc_dbltofix(-0.71414), v));
+ b = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.772), u));
+ *c0p++ = r;
+ *c1p++ = g;
+ *c2p++ = b;
+ }
+ }
+}
+
+jpc_fix_t jpc_mct_getsynweight(int mctid, int cmptno)
+{
+ jpc_fix_t synweight;
+
+ synweight = JPC_FIX_ONE;
+ switch (mctid) {
+ case JPC_MCT_RCT:
+ switch (cmptno) {
+ case 0:
+ synweight = jpc_dbltofix(sqrt(3.0));
+ break;
+ case 1:
+ synweight = jpc_dbltofix(sqrt(0.6875));
+ break;
+ case 2:
+ synweight = jpc_dbltofix(sqrt(0.6875));
+ break;
+ }
+ break;
+ case JPC_MCT_ICT:
+ switch (cmptno) {
+ case 0:
+ synweight = jpc_dbltofix(sqrt(3.0000));
+ break;
+ case 1:
+ synweight = jpc_dbltofix(sqrt(3.2584));
+ break;
+ case 2:
+ synweight = jpc_dbltofix(sqrt(2.4755));
+ break;
+ }
+ break;
+#if 0
+ default:
+ synweight = JPC_FIX_ONE;
+ break;
+#endif
+ }
+
+ return synweight;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 22:24:52 +0000