/* * 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. 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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: jpc_mct.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $ */ /******************************************************************************\ * Includes. \******************************************************************************/ #include #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; }