2003-11-27 11:10:17 +01:00
|
|
|
|
/*
|
2017-05-09 15:44:46 +02:00
|
|
|
|
* The copyright in this software is being made available under the 2-clauses
|
|
|
|
|
* BSD License, included below. This software may be subject to other third
|
2014-04-03 17:30:57 +02:00
|
|
|
|
* party and contributor rights, including patent rights, and no such rights
|
|
|
|
|
* are granted under this license.
|
|
|
|
|
*
|
|
|
|
|
* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
|
|
|
|
|
* Copyright (c) 2002-2014, Professor Benoit Macq
|
2005-12-02 14:34:15 +01:00
|
|
|
|
* Copyright (c) 2001-2003, David Janssens
|
2003-11-27 11:10:17 +01:00
|
|
|
|
* Copyright (c) 2002-2003, Yannick Verschueren
|
2017-05-09 15:44:46 +02:00
|
|
|
|
* Copyright (c) 2003-2007, Francois-Olivier Devaux
|
2014-04-03 17:30:57 +02:00
|
|
|
|
* Copyright (c) 2003-2014, Antonin Descampe
|
2007-01-15 10:55:40 +01:00
|
|
|
|
* Copyright (c) 2005, Herve Drolon, FreeImage Team
|
2012-10-03 13:38:12 +02:00
|
|
|
|
* Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
|
2003-11-27 11:10:17 +01:00
|
|
|
|
* All rights reserved.
|
|
|
|
|
*
|
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
|
* are met:
|
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
|
*
|
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
|
|
|
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
|
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
*/
|
|
|
|
|
|
2005-12-02 14:34:15 +01:00
|
|
|
|
#include "opj_includes.h"
|
2003-11-27 11:10:17 +01:00
|
|
|
|
|
2017-06-02 16:49:26 +02:00
|
|
|
|
#include <assert.h>
|
|
|
|
|
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/** @defgroup MQC MQC - Implementation of an MQ-Coder */
|
|
|
|
|
/*@{*/
|
|
|
|
|
|
|
|
|
|
/** @name Local static functions */
|
|
|
|
|
/*@{*/
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Output a byte, doing bit-stuffing if necessary.
|
|
|
|
|
After a 0xff byte, the next byte must be smaller than 0x90.
|
|
|
|
|
@param mqc MQC handle
|
|
|
|
|
*/
|
2012-10-03 13:38:12 +02:00
|
|
|
|
static void opj_mqc_byteout(opj_mqc_t *mqc);
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/**
|
|
|
|
|
Renormalize mqc->a and mqc->c while encoding, so that mqc->a stays between 0x8000 and 0x10000
|
|
|
|
|
@param mqc MQC handle
|
|
|
|
|
*/
|
2012-10-03 13:38:12 +02:00
|
|
|
|
static void opj_mqc_renorme(opj_mqc_t *mqc);
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/**
|
|
|
|
|
Encode the most probable symbol
|
|
|
|
|
@param mqc MQC handle
|
|
|
|
|
*/
|
2012-10-03 13:38:12 +02:00
|
|
|
|
static void opj_mqc_codemps(opj_mqc_t *mqc);
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/**
|
|
|
|
|
Encode the most least symbol
|
|
|
|
|
@param mqc MQC handle
|
|
|
|
|
*/
|
2012-10-03 13:38:12 +02:00
|
|
|
|
static void opj_mqc_codelps(opj_mqc_t *mqc);
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/**
|
|
|
|
|
Fill mqc->c with 1's for flushing
|
|
|
|
|
@param mqc MQC handle
|
|
|
|
|
*/
|
2012-10-03 13:38:12 +02:00
|
|
|
|
static void opj_mqc_setbits(opj_mqc_t *mqc);
|
2005-12-08 10:38:47 +01:00
|
|
|
|
/*@}*/
|
|
|
|
|
|
|
|
|
|
/*@}*/
|
|
|
|
|
|
2003-11-27 11:10:17 +01:00
|
|
|
|
/* <summary> */
|
|
|
|
|
/* This array defines all the possible states for a context. */
|
|
|
|
|
/* </summary> */
|
2017-08-14 14:36:06 +02:00
|
|
|
|
static const opj_mqc_state_t mqc_states[47 * 2] = {
|
2017-05-09 15:44:46 +02:00
|
|
|
|
{0x5601, 0, &mqc_states[2], &mqc_states[3]},
|
|
|
|
|
{0x5601, 1, &mqc_states[3], &mqc_states[2]},
|
|
|
|
|
{0x3401, 0, &mqc_states[4], &mqc_states[12]},
|
|
|
|
|
{0x3401, 1, &mqc_states[5], &mqc_states[13]},
|
|
|
|
|
{0x1801, 0, &mqc_states[6], &mqc_states[18]},
|
|
|
|
|
{0x1801, 1, &mqc_states[7], &mqc_states[19]},
|
|
|
|
|
{0x0ac1, 0, &mqc_states[8], &mqc_states[24]},
|
|
|
|
|
{0x0ac1, 1, &mqc_states[9], &mqc_states[25]},
|
|
|
|
|
{0x0521, 0, &mqc_states[10], &mqc_states[58]},
|
|
|
|
|
{0x0521, 1, &mqc_states[11], &mqc_states[59]},
|
|
|
|
|
{0x0221, 0, &mqc_states[76], &mqc_states[66]},
|
|
|
|
|
{0x0221, 1, &mqc_states[77], &mqc_states[67]},
|
|
|
|
|
{0x5601, 0, &mqc_states[14], &mqc_states[13]},
|
|
|
|
|
{0x5601, 1, &mqc_states[15], &mqc_states[12]},
|
|
|
|
|
{0x5401, 0, &mqc_states[16], &mqc_states[28]},
|
|
|
|
|
{0x5401, 1, &mqc_states[17], &mqc_states[29]},
|
|
|
|
|
{0x4801, 0, &mqc_states[18], &mqc_states[28]},
|
|
|
|
|
{0x4801, 1, &mqc_states[19], &mqc_states[29]},
|
|
|
|
|
{0x3801, 0, &mqc_states[20], &mqc_states[28]},
|
|
|
|
|
{0x3801, 1, &mqc_states[21], &mqc_states[29]},
|
|
|
|
|
{0x3001, 0, &mqc_states[22], &mqc_states[34]},
|
|
|
|
|
{0x3001, 1, &mqc_states[23], &mqc_states[35]},
|
|
|
|
|
{0x2401, 0, &mqc_states[24], &mqc_states[36]},
|
|
|
|
|
{0x2401, 1, &mqc_states[25], &mqc_states[37]},
|
|
|
|
|
{0x1c01, 0, &mqc_states[26], &mqc_states[40]},
|
|
|
|
|
{0x1c01, 1, &mqc_states[27], &mqc_states[41]},
|
|
|
|
|
{0x1601, 0, &mqc_states[58], &mqc_states[42]},
|
|
|
|
|
{0x1601, 1, &mqc_states[59], &mqc_states[43]},
|
|
|
|
|
{0x5601, 0, &mqc_states[30], &mqc_states[29]},
|
|
|
|
|
{0x5601, 1, &mqc_states[31], &mqc_states[28]},
|
|
|
|
|
{0x5401, 0, &mqc_states[32], &mqc_states[28]},
|
|
|
|
|
{0x5401, 1, &mqc_states[33], &mqc_states[29]},
|
|
|
|
|
{0x5101, 0, &mqc_states[34], &mqc_states[30]},
|
|
|
|
|
{0x5101, 1, &mqc_states[35], &mqc_states[31]},
|
|
|
|
|
{0x4801, 0, &mqc_states[36], &mqc_states[32]},
|
|
|
|
|
{0x4801, 1, &mqc_states[37], &mqc_states[33]},
|
|
|
|
|
{0x3801, 0, &mqc_states[38], &mqc_states[34]},
|
|
|
|
|
{0x3801, 1, &mqc_states[39], &mqc_states[35]},
|
|
|
|
|
{0x3401, 0, &mqc_states[40], &mqc_states[36]},
|
|
|
|
|
{0x3401, 1, &mqc_states[41], &mqc_states[37]},
|
|
|
|
|
{0x3001, 0, &mqc_states[42], &mqc_states[38]},
|
|
|
|
|
{0x3001, 1, &mqc_states[43], &mqc_states[39]},
|
|
|
|
|
{0x2801, 0, &mqc_states[44], &mqc_states[38]},
|
|
|
|
|
{0x2801, 1, &mqc_states[45], &mqc_states[39]},
|
|
|
|
|
{0x2401, 0, &mqc_states[46], &mqc_states[40]},
|
|
|
|
|
{0x2401, 1, &mqc_states[47], &mqc_states[41]},
|
|
|
|
|
{0x2201, 0, &mqc_states[48], &mqc_states[42]},
|
|
|
|
|
{0x2201, 1, &mqc_states[49], &mqc_states[43]},
|
|
|
|
|
{0x1c01, 0, &mqc_states[50], &mqc_states[44]},
|
|
|
|
|
{0x1c01, 1, &mqc_states[51], &mqc_states[45]},
|
|
|
|
|
{0x1801, 0, &mqc_states[52], &mqc_states[46]},
|
|
|
|
|
{0x1801, 1, &mqc_states[53], &mqc_states[47]},
|
|
|
|
|
{0x1601, 0, &mqc_states[54], &mqc_states[48]},
|
|
|
|
|
{0x1601, 1, &mqc_states[55], &mqc_states[49]},
|
|
|
|
|
{0x1401, 0, &mqc_states[56], &mqc_states[50]},
|
|
|
|
|
{0x1401, 1, &mqc_states[57], &mqc_states[51]},
|
|
|
|
|
{0x1201, 0, &mqc_states[58], &mqc_states[52]},
|
|
|
|
|
{0x1201, 1, &mqc_states[59], &mqc_states[53]},
|
|
|
|
|
{0x1101, 0, &mqc_states[60], &mqc_states[54]},
|
|
|
|
|
{0x1101, 1, &mqc_states[61], &mqc_states[55]},
|
|
|
|
|
{0x0ac1, 0, &mqc_states[62], &mqc_states[56]},
|
|
|
|
|
{0x0ac1, 1, &mqc_states[63], &mqc_states[57]},
|
|
|
|
|
{0x09c1, 0, &mqc_states[64], &mqc_states[58]},
|
|
|
|
|
{0x09c1, 1, &mqc_states[65], &mqc_states[59]},
|
|
|
|
|
{0x08a1, 0, &mqc_states[66], &mqc_states[60]},
|
|
|
|
|
{0x08a1, 1, &mqc_states[67], &mqc_states[61]},
|
|
|
|
|
{0x0521, 0, &mqc_states[68], &mqc_states[62]},
|
|
|
|
|
{0x0521, 1, &mqc_states[69], &mqc_states[63]},
|
|
|
|
|
{0x0441, 0, &mqc_states[70], &mqc_states[64]},
|
|
|
|
|
{0x0441, 1, &mqc_states[71], &mqc_states[65]},
|
|
|
|
|
{0x02a1, 0, &mqc_states[72], &mqc_states[66]},
|
|
|
|
|
{0x02a1, 1, &mqc_states[73], &mqc_states[67]},
|
|
|
|
|
{0x0221, 0, &mqc_states[74], &mqc_states[68]},
|
|
|
|
|
{0x0221, 1, &mqc_states[75], &mqc_states[69]},
|
|
|
|
|
{0x0141, 0, &mqc_states[76], &mqc_states[70]},
|
|
|
|
|
{0x0141, 1, &mqc_states[77], &mqc_states[71]},
|
|
|
|
|
{0x0111, 0, &mqc_states[78], &mqc_states[72]},
|
|
|
|
|
{0x0111, 1, &mqc_states[79], &mqc_states[73]},
|
|
|
|
|
{0x0085, 0, &mqc_states[80], &mqc_states[74]},
|
|
|
|
|
{0x0085, 1, &mqc_states[81], &mqc_states[75]},
|
|
|
|
|
{0x0049, 0, &mqc_states[82], &mqc_states[76]},
|
|
|
|
|
{0x0049, 1, &mqc_states[83], &mqc_states[77]},
|
|
|
|
|
{0x0025, 0, &mqc_states[84], &mqc_states[78]},
|
|
|
|
|
{0x0025, 1, &mqc_states[85], &mqc_states[79]},
|
|
|
|
|
{0x0015, 0, &mqc_states[86], &mqc_states[80]},
|
|
|
|
|
{0x0015, 1, &mqc_states[87], &mqc_states[81]},
|
|
|
|
|
{0x0009, 0, &mqc_states[88], &mqc_states[82]},
|
|
|
|
|
{0x0009, 1, &mqc_states[89], &mqc_states[83]},
|
|
|
|
|
{0x0005, 0, &mqc_states[90], &mqc_states[84]},
|
|
|
|
|
{0x0005, 1, &mqc_states[91], &mqc_states[85]},
|
|
|
|
|
{0x0001, 0, &mqc_states[90], &mqc_states[86]},
|
|
|
|
|
{0x0001, 1, &mqc_states[91], &mqc_states[87]},
|
|
|
|
|
{0x5601, 0, &mqc_states[92], &mqc_states[92]},
|
|
|
|
|
{0x5601, 1, &mqc_states[93], &mqc_states[93]},
|
2003-11-27 11:10:17 +01:00
|
|
|
|
};
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
/*
|
2005-12-02 14:34:15 +01:00
|
|
|
|
==========================================================
|
|
|
|
|
local functions
|
|
|
|
|
==========================================================
|
|
|
|
|
*/
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
static void opj_mqc_byteout(opj_mqc_t *mqc)
|
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* bp is initialized to start - 1 in opj_mqc_init_enc() */
|
|
|
|
|
/* but this is safe, see opj_tcd_code_block_enc_allocate_data() */
|
|
|
|
|
assert(mqc->bp >= mqc->start - 1);
|
|
|
|
|
if (*mqc->bp == 0xff) {
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->bp++;
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)(mqc->c >> 20);
|
|
|
|
|
mqc->c &= 0xfffff;
|
|
|
|
|
mqc->ct = 7;
|
|
|
|
|
} else {
|
|
|
|
|
if ((mqc->c & 0x8000000) == 0) {
|
|
|
|
|
mqc->bp++;
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)(mqc->c >> 19);
|
|
|
|
|
mqc->c &= 0x7ffff;
|
|
|
|
|
mqc->ct = 8;
|
|
|
|
|
} else {
|
|
|
|
|
(*mqc->bp)++;
|
|
|
|
|
if (*mqc->bp == 0xff) {
|
|
|
|
|
mqc->c &= 0x7ffffff;
|
|
|
|
|
mqc->bp++;
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)(mqc->c >> 20);
|
|
|
|
|
mqc->c &= 0xfffff;
|
|
|
|
|
mqc->ct = 7;
|
|
|
|
|
} else {
|
|
|
|
|
mqc->bp++;
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)(mqc->c >> 19);
|
|
|
|
|
mqc->c &= 0x7ffff;
|
|
|
|
|
mqc->ct = 8;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
static void opj_mqc_renorme(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
do {
|
|
|
|
|
mqc->a <<= 1;
|
|
|
|
|
mqc->c <<= 1;
|
|
|
|
|
mqc->ct--;
|
|
|
|
|
if (mqc->ct == 0) {
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
}
|
|
|
|
|
} while ((mqc->a & 0x8000) == 0);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
static void opj_mqc_codemps(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
mqc->a -= (*mqc->curctx)->qeval;
|
|
|
|
|
if ((mqc->a & 0x8000) == 0) {
|
|
|
|
|
if (mqc->a < (*mqc->curctx)->qeval) {
|
|
|
|
|
mqc->a = (*mqc->curctx)->qeval;
|
|
|
|
|
} else {
|
|
|
|
|
mqc->c += (*mqc->curctx)->qeval;
|
|
|
|
|
}
|
|
|
|
|
*mqc->curctx = (*mqc->curctx)->nmps;
|
|
|
|
|
opj_mqc_renorme(mqc);
|
|
|
|
|
} else {
|
|
|
|
|
mqc->c += (*mqc->curctx)->qeval;
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
static void opj_mqc_codelps(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
mqc->a -= (*mqc->curctx)->qeval;
|
|
|
|
|
if (mqc->a < (*mqc->curctx)->qeval) {
|
|
|
|
|
mqc->c += (*mqc->curctx)->qeval;
|
|
|
|
|
} else {
|
|
|
|
|
mqc->a = (*mqc->curctx)->qeval;
|
|
|
|
|
}
|
|
|
|
|
*mqc->curctx = (*mqc->curctx)->nlps;
|
|
|
|
|
opj_mqc_renorme(mqc);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
static void opj_mqc_setbits(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
OPJ_UINT32 tempc = mqc->c + mqc->a;
|
|
|
|
|
mqc->c |= 0xffff;
|
|
|
|
|
if (mqc->c >= tempc) {
|
|
|
|
|
mqc->c -= 0x8000;
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
/*
|
2005-12-02 14:34:15 +01:00
|
|
|
|
==========================================================
|
|
|
|
|
MQ-Coder interface
|
|
|
|
|
==========================================================
|
|
|
|
|
*/
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
OPJ_UINT32 opj_mqc_numbytes(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
const ptrdiff_t diff = mqc->bp - mqc->start;
|
2014-03-04 09:40:06 +01:00
|
|
|
|
#if 0
|
2017-05-09 15:44:46 +02:00
|
|
|
|
assert(diff <= 0xffffffff && diff >= 0); /* UINT32_MAX */
|
2014-03-04 09:40:06 +01:00
|
|
|
|
#endif
|
2017-05-09 15:44:46 +02:00
|
|
|
|
return (OPJ_UINT32)diff;
|
2005-12-02 14:34:15 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_init_enc(opj_mqc_t *mqc, OPJ_BYTE *bp)
|
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* To avoid the curctx pointer to be dangling, but not strictly */
|
|
|
|
|
/* required as the current context is always set before encoding */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
opj_mqc_setcurctx(mqc, 0);
|
2017-06-09 10:47:13 +02:00
|
|
|
|
|
|
|
|
|
/* As specified in Figure C.10 - Initialization of the encoder */
|
|
|
|
|
/* (C.2.8 Initialization of the encoder (INITENC)) */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->a = 0x8000;
|
|
|
|
|
mqc->c = 0;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* Yes, we point before the start of the buffer, but this is safe */
|
|
|
|
|
/* given opj_tcd_code_block_enc_allocate_data() */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->bp = bp - 1;
|
|
|
|
|
mqc->ct = 12;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* At this point we should test *(mqc->bp) against 0xFF, but this is not */
|
|
|
|
|
/* necessary, as this is only used at the beginning of the code block */
|
|
|
|
|
/* and our initial fake byte is set at 0 */
|
|
|
|
|
assert(*(mqc->bp) != 0xff);
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->start = bp;
|
2017-07-26 21:39:50 +02:00
|
|
|
|
mqc->end_of_byte_stream_counter = 0;
|
2005-12-02 14:34:15 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_encode(opj_mqc_t *mqc, OPJ_UINT32 d)
|
|
|
|
|
{
|
|
|
|
|
if ((*mqc->curctx)->mps == d) {
|
|
|
|
|
opj_mqc_codemps(mqc);
|
|
|
|
|
} else {
|
|
|
|
|
opj_mqc_codelps(mqc);
|
|
|
|
|
}
|
2005-12-02 14:34:15 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_flush(opj_mqc_t *mqc)
|
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* C.2.9 Termination of coding (FLUSH) */
|
|
|
|
|
/* Figure C.11 – FLUSH procedure */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
opj_mqc_setbits(mqc);
|
|
|
|
|
mqc->c <<= mqc->ct;
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
mqc->c <<= mqc->ct;
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* It is forbidden that a coding pass ends with 0xff */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
if (*mqc->bp != 0xff) {
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* Advance pointer so that opj_mqc_numbytes() returns a valid value */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->bp++;
|
|
|
|
|
}
|
2005-12-02 14:34:15 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
#define BYPASS_CT_INIT 0xDEADBEEF
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_bypass_init_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* This function is normally called after at least one opj_mqc_flush() */
|
|
|
|
|
/* which will have advance mqc->bp by at least 2 bytes beyond its */
|
|
|
|
|
/* initial position */
|
|
|
|
|
assert(mqc->bp >= mqc->start);
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->c = 0;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* in theory we should initialize to 8, but use this special value */
|
|
|
|
|
/* as a hint that opj_mqc_bypass_enc() has never been called, so */
|
|
|
|
|
/* as to avoid the 0xff 0x7f elimination trick in opj_mqc_bypass_flush_enc() */
|
|
|
|
|
/* to trigger when we don't have output any bit during this bypass sequence */
|
|
|
|
|
/* Any value > 8 will do */
|
|
|
|
|
mqc->ct = BYPASS_CT_INIT;
|
|
|
|
|
/* Given that we are called after opj_mqc_flush(), the previous byte */
|
|
|
|
|
/* cannot be 0xff. */
|
|
|
|
|
assert(mqc->bp[-1] != 0xff);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_bypass_enc(opj_mqc_t *mqc, OPJ_UINT32 d)
|
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
if (mqc->ct == BYPASS_CT_INIT) {
|
|
|
|
|
mqc->ct = 8;
|
|
|
|
|
}
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->ct--;
|
|
|
|
|
mqc->c = mqc->c + (d << mqc->ct);
|
|
|
|
|
if (mqc->ct == 0) {
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)mqc->c;
|
|
|
|
|
mqc->ct = 8;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* If the previous byte was 0xff, make sure that the next msb is 0 */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
if (*mqc->bp == 0xff) {
|
|
|
|
|
mqc->ct = 7;
|
|
|
|
|
}
|
2017-06-09 10:47:13 +02:00
|
|
|
|
mqc->bp++;
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->c = 0;
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
OPJ_UINT32 opj_mqc_bypass_get_extra_bytes(opj_mqc_t *mqc, OPJ_BOOL erterm)
|
2017-05-09 15:44:46 +02:00
|
|
|
|
{
|
2017-06-09 10:47:13 +02:00
|
|
|
|
return (mqc->ct < 7 ||
|
|
|
|
|
(mqc->ct == 7 && (erterm || mqc->bp[-1] != 0xff))) ? 1 : 0;
|
|
|
|
|
}
|
2017-05-09 15:44:46 +02:00
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
void opj_mqc_bypass_flush_enc(opj_mqc_t *mqc, OPJ_BOOL erterm)
|
|
|
|
|
{
|
|
|
|
|
/* Is there any bit remaining to be flushed ? */
|
|
|
|
|
/* If the last output byte is 0xff, we can discard it, unless */
|
|
|
|
|
/* erterm is required (I'm not completely sure why in erterm */
|
|
|
|
|
/* we must output 0xff 0x2a if the last byte was 0xff instead of */
|
|
|
|
|
/* discarding it, but Kakadu requires it when decoding */
|
|
|
|
|
/* in -fussy mode) */
|
|
|
|
|
if (mqc->ct < 7 || (mqc->ct == 7 && (erterm || mqc->bp[-1] != 0xff))) {
|
|
|
|
|
OPJ_BYTE bit_value = 0;
|
|
|
|
|
/* If so, fill the remaining lsbs with an alternating sequence of */
|
|
|
|
|
/* 0,1,... */
|
|
|
|
|
/* Note: it seems the standard only requires that for a ERTERM flush */
|
|
|
|
|
/* and doesn't specify what to do for a regular BYPASS flush */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
while (mqc->ct > 0) {
|
|
|
|
|
mqc->ct--;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
mqc->c += (OPJ_UINT32)(bit_value << mqc->ct);
|
|
|
|
|
bit_value = (OPJ_BYTE)(1U - bit_value);
|
2017-05-09 15:44:46 +02:00
|
|
|
|
}
|
|
|
|
|
*mqc->bp = (OPJ_BYTE)mqc->c;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* Advance pointer so that opj_mqc_numbytes() returns a valid value */
|
|
|
|
|
mqc->bp++;
|
|
|
|
|
} else if (mqc->ct == 7 && mqc->bp[-1] == 0xff) {
|
|
|
|
|
/* Discard last 0xff */
|
|
|
|
|
assert(!erterm);
|
|
|
|
|
mqc->bp --;
|
|
|
|
|
} else if (mqc->ct == 8 && !erterm &&
|
|
|
|
|
mqc->bp[-1] == 0x7f && mqc->bp[-2] == 0xff) {
|
|
|
|
|
/* Tiny optimization: discard terminating 0xff 0x7f since it is */
|
|
|
|
|
/* interpreted as 0xff 0x7f [0xff 0xff] by the decoder, and given */
|
|
|
|
|
/* the bit stuffing, in fact as 0xff 0xff [0xff ..] */
|
|
|
|
|
/* Happens once on opj_compress -i ../MAPA.tif -o MAPA.j2k -M 1 */
|
|
|
|
|
mqc->bp -= 2;
|
2017-05-09 15:44:46 +02:00
|
|
|
|
}
|
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
assert(mqc->bp[-1] != 0xff);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_reset_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
opj_mqc_resetstates(mqc);
|
|
|
|
|
opj_mqc_setstate(mqc, T1_CTXNO_UNI, 0, 46);
|
|
|
|
|
opj_mqc_setstate(mqc, T1_CTXNO_AGG, 0, 3);
|
|
|
|
|
opj_mqc_setstate(mqc, T1_CTXNO_ZC, 0, 4);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-06-09 10:47:13 +02:00
|
|
|
|
#ifdef notdef
|
2017-05-09 15:44:46 +02:00
|
|
|
|
OPJ_UINT32 opj_mqc_restart_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
OPJ_UINT32 correction = 1;
|
|
|
|
|
|
|
|
|
|
/* <flush part> */
|
|
|
|
|
OPJ_INT32 n = (OPJ_INT32)(27 - 15 - mqc->ct);
|
|
|
|
|
mqc->c <<= mqc->ct;
|
|
|
|
|
while (n > 0) {
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
n -= (OPJ_INT32)mqc->ct;
|
|
|
|
|
mqc->c <<= mqc->ct;
|
|
|
|
|
}
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
|
|
|
|
|
return correction;
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
2017-06-09 10:47:13 +02:00
|
|
|
|
#endif
|
2003-11-27 11:10:17 +01:00
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_restart_init_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
/* <Re-init part> */
|
2017-06-09 10:47:13 +02:00
|
|
|
|
|
|
|
|
|
/* As specified in Figure C.10 - Initialization of the encoder */
|
|
|
|
|
/* (C.2.8 Initialization of the encoder (INITENC)) */
|
2017-05-09 15:44:46 +02:00
|
|
|
|
mqc->a = 0x8000;
|
|
|
|
|
mqc->c = 0;
|
|
|
|
|
mqc->ct = 12;
|
2017-06-09 10:47:13 +02:00
|
|
|
|
/* This function is normally called after at least one opj_mqc_flush() */
|
|
|
|
|
/* which will have advance mqc->bp by at least 2 bytes beyond its */
|
|
|
|
|
/* initial position */
|
|
|
|
|
mqc->bp --;
|
|
|
|
|
assert(mqc->bp >= mqc->start - 1);
|
|
|
|
|
assert(*mqc->bp != 0xff);
|
2017-05-09 15:44:46 +02:00
|
|
|
|
if (*mqc->bp == 0xff) {
|
|
|
|
|
mqc->ct = 13;
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_erterm_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
OPJ_INT32 k = (OPJ_INT32)(11 - mqc->ct + 1);
|
|
|
|
|
|
|
|
|
|
while (k > 0) {
|
|
|
|
|
mqc->c <<= mqc->ct;
|
|
|
|
|
mqc->ct = 0;
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
k -= (OPJ_INT32)mqc->ct;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (*mqc->bp != 0xff) {
|
|
|
|
|
opj_mqc_byteout(mqc);
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_segmark_enc(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
OPJ_UINT32 i;
|
|
|
|
|
opj_mqc_setcurctx(mqc, 18);
|
|
|
|
|
|
|
|
|
|
for (i = 1; i < 5; i++) {
|
|
|
|
|
opj_mqc_encode(mqc, i % 2);
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-06-02 16:49:26 +02:00
|
|
|
|
static void opj_mqc_init_dec_common(opj_mqc_t *mqc,
|
|
|
|
|
OPJ_BYTE *bp,
|
|
|
|
|
OPJ_UINT32 len,
|
|
|
|
|
OPJ_UINT32 extra_writable_bytes)
|
|
|
|
|
{
|
|
|
|
|
(void)extra_writable_bytes;
|
|
|
|
|
|
|
|
|
|
assert(extra_writable_bytes >= OPJ_COMMON_CBLK_DATA_EXTRA);
|
|
|
|
|
mqc->start = bp;
|
|
|
|
|
mqc->end = bp + len;
|
|
|
|
|
/* Insert an artificial 0xFF 0xFF marker at end of the code block */
|
|
|
|
|
/* data so that the bytein routines stop on it. This saves us comparing */
|
|
|
|
|
/* the bp and end pointers */
|
|
|
|
|
/* But before inserting it, backup th bytes we will overwrite */
|
|
|
|
|
memcpy(mqc->backup, mqc->end, OPJ_COMMON_CBLK_DATA_EXTRA);
|
|
|
|
|
mqc->end[0] = 0xFF;
|
|
|
|
|
mqc->end[1] = 0xFF;
|
|
|
|
|
mqc->bp = bp;
|
|
|
|
|
}
|
|
|
|
|
void opj_mqc_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
|
|
|
|
|
OPJ_UINT32 extra_writable_bytes)
|
2017-05-09 15:44:46 +02:00
|
|
|
|
{
|
2017-05-15 14:09:51 +02:00
|
|
|
|
/* Implements ISO 15444-1 C.3.5 Initialization of the decoder (INITDEC) */
|
|
|
|
|
/* Note: alternate "J.1 - Initialization of the software-conventions */
|
|
|
|
|
/* decoder" has been tried, but does */
|
|
|
|
|
/* not bring any improvement. */
|
|
|
|
|
/* See https://github.com/uclouvain/openjpeg/issues/921 */
|
2017-06-02 16:49:26 +02:00
|
|
|
|
opj_mqc_init_dec_common(mqc, bp, len, extra_writable_bytes);
|
2017-05-09 15:44:46 +02:00
|
|
|
|
opj_mqc_setcurctx(mqc, 0);
|
2017-07-26 21:39:50 +02:00
|
|
|
|
mqc->end_of_byte_stream_counter = 0;
|
2017-05-09 15:44:46 +02:00
|
|
|
|
if (len == 0) {
|
|
|
|
|
mqc->c = 0xff << 16;
|
|
|
|
|
} else {
|
|
|
|
|
mqc->c = (OPJ_UINT32)(*mqc->bp << 16);
|
|
|
|
|
}
|
2010-04-08 19:22:58 +02:00
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
opj_mqc_bytein(mqc);
|
|
|
|
|
mqc->c <<= 7;
|
|
|
|
|
mqc->ct -= 7;
|
|
|
|
|
mqc->a = 0x8000;
|
2017-06-02 16:49:26 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void opj_mqc_raw_init_dec(opj_mqc_t *mqc, OPJ_BYTE *bp, OPJ_UINT32 len,
|
|
|
|
|
OPJ_UINT32 extra_writable_bytes)
|
|
|
|
|
{
|
|
|
|
|
opj_mqc_init_dec_common(mqc, bp, len, extra_writable_bytes);
|
|
|
|
|
mqc->c = 0;
|
|
|
|
|
mqc->ct = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void opq_mqc_finish_dec(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
/* Restore the bytes overwritten by opj_mqc_init_dec_common() */
|
|
|
|
|
memcpy(mqc->end, mqc->backup, OPJ_COMMON_CBLK_DATA_EXTRA);
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_resetstates(opj_mqc_t *mqc)
|
|
|
|
|
{
|
|
|
|
|
OPJ_UINT32 i;
|
|
|
|
|
for (i = 0; i < MQC_NUMCTXS; i++) {
|
|
|
|
|
mqc->ctxs[i] = mqc_states;
|
|
|
|
|
}
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 15:44:46 +02:00
|
|
|
|
void opj_mqc_setstate(opj_mqc_t *mqc, OPJ_UINT32 ctxno, OPJ_UINT32 msb,
|
|
|
|
|
OPJ_INT32 prob)
|
|
|
|
|
{
|
|
|
|
|
mqc->ctxs[ctxno] = &mqc_states[msb + (OPJ_UINT32)(prob << 1)];
|
2003-11-27 11:10:17 +01:00
|
|
|
|
}
|
2005-12-02 14:34:15 +01:00
|
|
|
|
|
|
|
|
|
|