/* * 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 "jpc_mct.h"#include "jpc_fix.h" #include "jasper/jas_seq.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;			y = jpc_fix_asr(r + jpc_fix_asl(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);			g = y - jpc_fix_asr(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;		}	}}