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498 lines
12 KiB
C
498 lines
12 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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* $Id: jpc_t1cod.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 <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <math.h>
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#include "jasper/jas_types.h"
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#include "jasper/jas_math.h"
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#include "jpc_bs.h"
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#include "jpc_dec.h"
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#include "jpc_cs.h"
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#include "jpc_mqcod.h"
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#include "jpc_t1cod.h"
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#include "jpc_tsfb.h"
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double jpc_pow2i(int n);
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/******************************************************************************\
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* Global data.
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\******************************************************************************/
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int jpc_zcctxnolut[4 * 256];
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int jpc_spblut[256];
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int jpc_scctxnolut[256];
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int jpc_magctxnolut[4096];
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jpc_fix_t jpc_signmsedec[1 << JPC_NMSEDEC_BITS];
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jpc_fix_t jpc_refnmsedec[1 << JPC_NMSEDEC_BITS];
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jpc_fix_t jpc_signmsedec0[1 << JPC_NMSEDEC_BITS];
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jpc_fix_t jpc_refnmsedec0[1 << JPC_NMSEDEC_BITS];
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jpc_mqctx_t jpc_mqctxs[JPC_NUMCTXS];
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/******************************************************************************\
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*
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\******************************************************************************/
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void jpc_initmqctxs(void);
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/******************************************************************************\
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* Code.
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\******************************************************************************/
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int JPC_PASSTYPE(int passno)
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{
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int passtype;
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switch (passno % 3) {
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case 0:
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passtype = JPC_CLNPASS;
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break;
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case 1:
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passtype = JPC_SIGPASS;
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break;
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case 2:
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passtype = JPC_REFPASS;
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break;
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default:
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passtype = -1;
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assert(0);
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break;
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}
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return passtype;
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}
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int JPC_NOMINALGAIN(int qmfbid, int numlvls, int lvlno, int orient)
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{
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/* Avoid compiler warnings about unused parameters. */
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numlvls = 0;
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if (qmfbid == JPC_COX_INS) {
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return 0;
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}
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assert(qmfbid == JPC_COX_RFT);
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if (lvlno == 0) {
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assert(orient == JPC_TSFB_LL);
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return 0;
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} else {
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switch (orient) {
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case JPC_TSFB_LH:
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case JPC_TSFB_HL:
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return 1;
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break;
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case JPC_TSFB_HH:
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return 2;
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break;
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}
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}
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abort();
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}
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/******************************************************************************\
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* Coding pass related functions.
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\******************************************************************************/
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int JPC_SEGTYPE(int passno, int firstpassno, int bypass)
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{
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int passtype;
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if (bypass) {
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passtype = JPC_PASSTYPE(passno);
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if (passtype == JPC_CLNPASS) {
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return JPC_SEG_MQ;
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}
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return ((passno < firstpassno + 10) ? JPC_SEG_MQ : JPC_SEG_RAW);
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} else {
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return JPC_SEG_MQ;
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}
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}
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int JPC_SEGPASSCNT(int passno, int firstpassno, int numpasses, int bypass, int termall)
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{
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int ret;
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int passtype;
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if (termall) {
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ret = 1;
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} else if (bypass) {
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if (passno < firstpassno + 10) {
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ret = 10 - (passno - firstpassno);
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} else {
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passtype = JPC_PASSTYPE(passno);
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switch (passtype) {
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case JPC_SIGPASS:
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ret = 2;
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break;
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case JPC_REFPASS:
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ret = 1;
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break;
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case JPC_CLNPASS:
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ret = 1;
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break;
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default:
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ret = -1;
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assert(0);
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break;
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}
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}
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} else {
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ret = JPC_PREC * 3 - 2;
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}
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ret = JAS_MIN(ret, numpasses - passno);
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return ret;
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}
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int JPC_ISTERMINATED(int passno, int firstpassno, int numpasses, int termall,
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int lazy)
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{
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int ret;
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int n;
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if (passno - firstpassno == numpasses - 1) {
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ret = 1;
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} else {
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n = JPC_SEGPASSCNT(passno, firstpassno, numpasses, lazy, termall);
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ret = (n <= 1) ? 1 : 0;
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}
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return ret;
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}
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/******************************************************************************\
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* Lookup table code.
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\******************************************************************************/
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void jpc_initluts()
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{
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int i;
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int orient;
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int refine;
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float u;
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float v;
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float t;
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/* XXX - hack */
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jpc_initmqctxs();
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for (orient = 0; orient < 4; ++orient) {
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for (i = 0; i < 256; ++i) {
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jpc_zcctxnolut[(orient << 8) | i] = jpc_getzcctxno(i, orient);
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}
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}
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for (i = 0; i < 256; ++i) {
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jpc_spblut[i] = jpc_getspb(i << 4);
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}
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for (i = 0; i < 256; ++i) {
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jpc_scctxnolut[i] = jpc_getscctxno(i << 4);
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}
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for (refine = 0; refine < 2; ++refine) {
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for (i = 0; i < 2048; ++i) {
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jpc_magctxnolut[(refine << 11) + i] = jpc_getmagctxno((refine ? JPC_REFINE : 0) | i);
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}
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}
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for (i = 0; i < (1 << JPC_NMSEDEC_BITS); ++i) {
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t = i * jpc_pow2i(-JPC_NMSEDEC_FRACBITS);
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u = t;
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v = t - 1.5;
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jpc_signmsedec[i] = jpc_dbltofix(floor((u * u - v * v) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
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/* XXX - this calc is not correct */
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jpc_signmsedec0[i] = jpc_dbltofix(floor((u * u) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
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u = t - 1.0;
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if (i & (1 << (JPC_NMSEDEC_BITS - 1))) {
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v = t - 1.5;
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} else {
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v = t - 0.5;
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}
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jpc_refnmsedec[i] = jpc_dbltofix(floor((u * u - v * v) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
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/* XXX - this calc is not correct */
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jpc_refnmsedec0[i] = jpc_dbltofix(floor((u * u) * jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) / jpc_pow2i(JPC_NMSEDEC_FRACBITS));
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}
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}
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jpc_fix_t jpc_getsignmsedec_func(jpc_fix_t x, int bitpos)
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{
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jpc_fix_t y;
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assert(!(x & (~JAS_ONES(bitpos + 1))));
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y = jpc_getsignmsedec_macro(x, bitpos);
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return y;
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}
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int jpc_getzcctxno(int f, int orient)
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{
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int h;
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int v;
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int d;
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int n;
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int t;
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int hv;
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/* Avoid compiler warning. */
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n = 0;
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h = ((f & JPC_WSIG) != 0) + ((f & JPC_ESIG) != 0);
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v = ((f & JPC_NSIG) != 0) + ((f & JPC_SSIG) != 0);
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d = ((f & JPC_NWSIG) != 0) + ((f & JPC_NESIG) != 0) + ((f & JPC_SESIG) != 0) + ((f & JPC_SWSIG) != 0);
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switch (orient) {
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case JPC_TSFB_HL:
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t = h;
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h = v;
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v = t;
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case JPC_TSFB_LL:
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case JPC_TSFB_LH:
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if (!h) {
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if (!v) {
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if (!d) {
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n = 0;
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} else if (d == 1) {
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n = 1;
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} else {
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n = 2;
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}
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} else if (v == 1) {
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n = 3;
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} else {
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n = 4;
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}
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} else if (h == 1) {
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if (!v) {
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if (!d) {
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n = 5;
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} else {
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n = 6;
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}
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} else {
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n = 7;
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}
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} else {
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n = 8;
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}
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break;
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case JPC_TSFB_HH:
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hv = h + v;
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if (!d) {
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if (!hv) {
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n = 0;
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} else if (hv == 1) {
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n = 1;
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} else {
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n = 2;
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}
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} else if (d == 1) {
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if (!hv) {
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n = 3;
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} else if (hv == 1) {
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n = 4;
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} else {
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n = 5;
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}
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} else if (d == 2) {
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if (!hv) {
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n = 6;
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} else {
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n = 7;
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}
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} else {
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n = 8;
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}
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break;
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}
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assert(n < JPC_NUMZCCTXS);
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return JPC_ZCCTXNO + n;
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}
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int jpc_getspb(int f)
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{
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int hc;
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int vc;
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int n;
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hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG), 1) -
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JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) + ((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
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vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG), 1) -
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JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) + ((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
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if (!hc && !vc) {
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n = 0;
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} else {
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n = (!(hc > 0 || (!hc && vc > 0)));
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}
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return n;
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}
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int jpc_getscctxno(int f)
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{
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int hc;
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int vc;
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int n;
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/* Avoid compiler warning. */
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n = 0;
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hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG),
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1) - JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) +
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((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
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vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG),
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1) - JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) +
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((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
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assert(hc >= -1 && hc <= 1 && vc >= -1 && vc <= 1);
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if (hc < 0) {
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hc = -hc;
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vc = -vc;
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}
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if (!hc) {
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if (vc == -1) {
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n = 1;
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} else if (!vc) {
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n = 0;
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} else {
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n = 1;
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}
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} else if (hc == 1) {
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if (vc == -1) {
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n = 2;
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} else if (!vc) {
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n = 3;
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} else {
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n = 4;
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}
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}
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assert(n < JPC_NUMSCCTXS);
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return JPC_SCCTXNO + n;
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}
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int jpc_getmagctxno(int f)
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{
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int n;
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if (!(f & JPC_REFINE)) {
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n = (f & (JPC_OTHSIGMSK)) ? 1 : 0;
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} else {
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n = 2;
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}
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assert(n < JPC_NUMMAGCTXS);
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return JPC_MAGCTXNO + n;
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}
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void jpc_initctxs(jpc_mqctx_t *ctxs)
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{
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jpc_mqctx_t *ctx;
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int i;
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ctx = ctxs;
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for (i = 0; i < JPC_NUMCTXS; ++i) {
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ctx->mps = 0;
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switch (i) {
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case JPC_UCTXNO:
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ctx->ind = 46;
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break;
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case JPC_ZCCTXNO:
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ctx->ind = 4;
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break;
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case JPC_AGGCTXNO:
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ctx->ind = 3;
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break;
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default:
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ctx->ind = 0;
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break;
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}
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++ctx;
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}
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}
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void jpc_initmqctxs()
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{
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jpc_initctxs(jpc_mqctxs);
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}
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/* Calculate the real quantity exp2(n), where x is an integer. */
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double jpc_pow2i(int n)
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{
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double x;
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double a;
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x = 1.0;
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if (n < 0) {
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a = 0.5;
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n = -n;
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} else {
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a = 2.0;
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}
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while (--n >= 0) {
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x *= a;
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}
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return x;
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}
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