292 lines
9.0 KiB
C
292 lines
9.0 KiB
C
/*
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* Copyright (c) 1999-2000 Image Power, Inc. and the University of
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* British Columbia.
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* Copyright (c) 2001-2003 Michael David Adams.
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* All rights reserved.
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*/
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/* __START_OF_JASPER_LICENSE__
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*
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* JasPer License Version 2.0
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*
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* Copyright (c) 2001-2006 Michael David Adams
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* Copyright (c) 1999-2000 Image Power, Inc.
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* Copyright (c) 1999-2000 The University of British Columbia
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*
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person (the
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* "User") obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, and/or sell copies of the Software, and to permit
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* persons to whom the Software is furnished to do so, subject to the
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* following conditions:
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*
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* 1. The above copyright notices and this permission notice (which
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* includes the disclaimer below) shall be included in all copies or
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* substantial portions of the Software.
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*
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* 2. The name of a copyright holder shall not be used to endorse or
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* promote products derived from the Software without specific prior
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* written permission.
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*
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* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
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* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
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* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
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* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
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* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
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* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
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* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
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* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
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* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
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* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
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* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
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* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
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* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
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* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
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* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
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* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
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* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
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* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
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* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
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*
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* __END_OF_JASPER_LICENSE__
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*/
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/*
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* Multicomponent Transform Code
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*
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* $Id: jpc_mct.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
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*/
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/******************************************************************************\
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* Includes.
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\******************************************************************************/
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#include <assert.h>
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#include "jasper/jas_seq.h"
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#include "jpc_fix.h"
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#include "jpc_mct.h"
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/******************************************************************************\
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* Code.
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\******************************************************************************/
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/* Compute the forward RCT. */
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void jpc_rct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
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{
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int numrows;
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int numcols;
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int i;
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int j;
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jpc_fix_t *c0p;
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jpc_fix_t *c1p;
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jpc_fix_t *c2p;
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numrows = jas_matrix_numrows(c0);
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numcols = jas_matrix_numcols(c0);
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/* All three matrices must have the same dimensions. */
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
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&& jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
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for (i = 0; i < numrows; i++) {
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c0p = jas_matrix_getref(c0, i, 0);
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c1p = jas_matrix_getref(c1, i, 0);
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c2p = jas_matrix_getref(c2, i, 0);
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for (j = numcols; j > 0; --j) {
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int r;
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int g;
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int b;
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int y;
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int u;
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int v;
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r = *c0p;
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g = *c1p;
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b = *c2p;
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y = (r + (g << 1) + b) >> 2;
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u = b - g;
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v = r - g;
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*c0p++ = y;
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*c1p++ = u;
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*c2p++ = v;
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}
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}
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}
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/* Compute the inverse RCT. */
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void jpc_irct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
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{
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int numrows;
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int numcols;
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int i;
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int j;
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jpc_fix_t *c0p;
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jpc_fix_t *c1p;
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jpc_fix_t *c2p;
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numrows = jas_matrix_numrows(c0);
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numcols = jas_matrix_numcols(c0);
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/* All three matrices must have the same dimensions. */
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols
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&& jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols);
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for (i = 0; i < numrows; i++) {
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c0p = jas_matrix_getref(c0, i, 0);
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c1p = jas_matrix_getref(c1, i, 0);
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c2p = jas_matrix_getref(c2, i, 0);
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for (j = numcols; j > 0; --j) {
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int r;
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int g;
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int b;
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int y;
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int u;
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int v;
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y = *c0p;
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u = *c1p;
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v = *c2p;
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g = y - ((u + v) >> 2);
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r = v + g;
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b = u + g;
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*c0p++ = r;
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*c1p++ = g;
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*c2p++ = b;
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}
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}
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}
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void jpc_ict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
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{
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int numrows;
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int numcols;
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int i;
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int j;
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jpc_fix_t r;
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jpc_fix_t g;
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jpc_fix_t b;
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jpc_fix_t y;
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jpc_fix_t u;
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jpc_fix_t v;
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jpc_fix_t *c0p;
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jpc_fix_t *c1p;
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jpc_fix_t *c2p;
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numrows = jas_matrix_numrows(c0);
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
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numcols = jas_matrix_numcols(c0);
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assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
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for (i = 0; i < numrows; ++i) {
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c0p = jas_matrix_getref(c0, i, 0);
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c1p = jas_matrix_getref(c1, i, 0);
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c2p = jas_matrix_getref(c2, i, 0);
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for (j = numcols; j > 0; --j) {
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r = *c0p;
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g = *c1p;
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b = *c2p;
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y = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.299), r), jpc_fix_mul(jpc_dbltofix(0.587), g),
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jpc_fix_mul(jpc_dbltofix(0.114), b));
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u = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(-0.16875), r), jpc_fix_mul(jpc_dbltofix(-0.33126), g),
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jpc_fix_mul(jpc_dbltofix(0.5), b));
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v = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.5), r), jpc_fix_mul(jpc_dbltofix(-0.41869), g),
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jpc_fix_mul(jpc_dbltofix(-0.08131), b));
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*c0p++ = y;
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*c1p++ = u;
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*c2p++ = v;
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}
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}
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}
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void jpc_iict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2)
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{
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int numrows;
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int numcols;
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int i;
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int j;
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jpc_fix_t r;
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jpc_fix_t g;
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jpc_fix_t b;
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jpc_fix_t y;
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jpc_fix_t u;
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jpc_fix_t v;
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jpc_fix_t *c0p;
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jpc_fix_t *c1p;
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jpc_fix_t *c2p;
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numrows = jas_matrix_numrows(c0);
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows);
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numcols = jas_matrix_numcols(c0);
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assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols);
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for (i = 0; i < numrows; ++i) {
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c0p = jas_matrix_getref(c0, i, 0);
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c1p = jas_matrix_getref(c1, i, 0);
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c2p = jas_matrix_getref(c2, i, 0);
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for (j = numcols; j > 0; --j) {
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y = *c0p;
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u = *c1p;
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v = *c2p;
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r = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.402), v));
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g = jpc_fix_add3(y, jpc_fix_mul(jpc_dbltofix(-0.34413), u),
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jpc_fix_mul(jpc_dbltofix(-0.71414), v));
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b = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.772), u));
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*c0p++ = r;
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*c1p++ = g;
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*c2p++ = b;
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}
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}
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}
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jpc_fix_t jpc_mct_getsynweight(int mctid, int cmptno)
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{
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jpc_fix_t synweight;
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synweight = JPC_FIX_ONE;
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switch (mctid) {
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case JPC_MCT_RCT:
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switch (cmptno) {
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case 0:
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synweight = jpc_dbltofix(sqrt(3.0));
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break;
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case 1:
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synweight = jpc_dbltofix(sqrt(0.6875));
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break;
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case 2:
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synweight = jpc_dbltofix(sqrt(0.6875));
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break;
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}
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break;
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case JPC_MCT_ICT:
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switch (cmptno) {
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case 0:
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synweight = jpc_dbltofix(sqrt(3.0000));
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break;
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case 1:
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synweight = jpc_dbltofix(sqrt(3.2584));
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break;
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case 2:
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synweight = jpc_dbltofix(sqrt(2.4755));
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break;
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}
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break;
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#if 0
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default:
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synweight = JPC_FIX_ONE;
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break;
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#endif
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}
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return synweight;
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}
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