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497 lines
13 KiB
497 lines
13 KiB
/* |
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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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