ref: f7e5af47f117be34669dc1e532d525dcbbff73f0
dir: /jpc_t1cod.c/
/*
* Copyright (c) 1999-2000 Image Power, Inc. and the University of
* British Columbia.
* Copyright (c) 2001-2003 Michael David Adams.
* All rights reserved.
*/
/* __START_OF_JASPER_LICENSE__
*
* JasPer License Version 2.0
*
* Copyright (c) 2001-2006 Michael David Adams
* Copyright (c) 1999-2000 Image Power, Inc.
* Copyright (c) 1999-2000 The University of British Columbia
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person (the
* "User") obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* 1. The above copyright notices and this permission notice (which
* includes the disclaimer below) shall be included in all copies or
* substantial portions of the Software.
*
* 2. The name of a copyright holder shall not be used to endorse or
* promote products derived from the Software without specific prior
* written permission.
*
* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
*
* __END_OF_JASPER_LICENSE__
*/
/*
* $Id$
*/
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jpc_t1cod.h"
#include "jpc_cod.h"
#include "jpc_cs.h"
#include "jpc_mqcod.h"
#include "jpc_tsfb.h"
#include "jasper/jas_math.h"
JAS_ATTRIBUTE_CONST
static double jpc_pow2i(int n);
/******************************************************************************\
* Global data.
\******************************************************************************/
uint_least8_t jpc_zcctxnolut[4 * 256];
bool jpc_spblut[256];
uint_least8_t jpc_scctxnolut[256];
uint_least8_t jpc_magctxnolut[4096];
jpc_fix_t jpc_signmsedec[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_refnmsedec[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_signmsedec0[1 << JPC_NMSEDEC_BITS];
jpc_fix_t jpc_refnmsedec0[1 << JPC_NMSEDEC_BITS];
jpc_mqctx_t jpc_mqctxs[JPC_NUMCTXS];
/******************************************************************************\
*
\******************************************************************************/
JAS_ATTRIBUTE_CONST
static uint_least8_t jpc_getzcctxno(unsigned f, enum jpc_tsfb_orient orient);
JAS_ATTRIBUTE_CONST
static bool jpc_getspb(unsigned f);
JAS_ATTRIBUTE_CONST
static uint_least8_t jpc_getscctxno(unsigned f);
JAS_ATTRIBUTE_CONST
static uint_least8_t jpc_getmagctxno(unsigned f);
/******************************************************************************\
* Code.
\******************************************************************************/
enum jpc_passtype JPC_PASSTYPE(unsigned passno)
{
unsigned passtype = 0;
switch (passno % 3) {
case 0:
passtype = JPC_CLNPASS;
break;
case 1:
passtype = JPC_SIGPASS;
break;
case 2:
passtype = JPC_REFPASS;
break;
default:
assert(0);
JAS_UNREACHABLE();
}
return passtype;
}
unsigned JPC_NOMINALGAIN(unsigned qmfbid, unsigned numlvls, unsigned lvlno, enum jpc_tsfb_orient orient)
{
JAS_UNUSED(numlvls);
if (qmfbid == JPC_COX_INS) {
return 0;
}
assert(qmfbid == JPC_COX_RFT);
if (lvlno == 0) {
assert(orient == JPC_TSFB_LL);
return 0;
} else {
switch (orient) {
case JPC_TSFB_LH:
case JPC_TSFB_HL:
return 1;
case JPC_TSFB_HH:
return 2;
default:
assert(false);
JAS_UNREACHABLE();
}
}
JAS_UNREACHABLE();
return -1;
}
/******************************************************************************\
* Coding pass related functions.
\******************************************************************************/
enum jpc_segtype JPC_SEGTYPE(unsigned passno, unsigned firstpassno, bool bypass)
{
if (bypass) {
enum jpc_passtype passtype = JPC_PASSTYPE(passno);
if (passtype == JPC_CLNPASS) {
return JPC_SEG_MQ;
}
return ((passno < firstpassno + 10) ? JPC_SEG_MQ : JPC_SEG_RAW);
} else {
return JPC_SEG_MQ;
}
}
unsigned JPC_SEGPASSCNT(unsigned passno, unsigned firstpassno, unsigned numpasses, bool bypass, bool termall)
{
unsigned ret = 0;
if (termall) {
ret = 1;
} else if (bypass) {
if (passno < firstpassno + 10) {
ret = 10 - (passno - firstpassno);
} else {
enum jpc_passtype passtype = JPC_PASSTYPE(passno);
switch (passtype) {
case JPC_SIGPASS:
ret = 2;
break;
case JPC_REFPASS:
ret = 1;
break;
case JPC_CLNPASS:
ret = 1;
break;
default:
assert(0);
JAS_UNREACHABLE();
}
}
} else {
ret = JPC_PREC * 3 - 2;
}
ret = JAS_MIN(ret, numpasses - passno);
return ret;
}
bool JPC_ISTERMINATED(unsigned passno, unsigned firstpassno, unsigned numpasses, bool termall,
bool lazy)
{
if (passno - firstpassno == numpasses - 1) {
return true;
} else {
unsigned n = JPC_SEGPASSCNT(passno, firstpassno, numpasses, lazy, termall);
return n <= 1;
}
}
/******************************************************************************\
* Lookup table code.
\******************************************************************************/
void jpc_initluts()
{
float u;
float v;
float t;
for (unsigned orient = 0; orient < 4; ++orient) {
for (unsigned i = 0; i < 256; ++i) {
jpc_zcctxnolut[(orient << 8) | i] = jpc_getzcctxno(i, orient);
}
}
for (unsigned i = 0; i < 256; ++i) {
jpc_spblut[i] = jpc_getspb(i << 4);
}
for (unsigned i = 0; i < 256; ++i) {
jpc_scctxnolut[i] = jpc_getscctxno(i << 4);
}
for (unsigned refine = 0; refine < 2; ++refine) {
for (unsigned i = 0; i < 2048; ++i) {
jpc_magctxnolut[(refine << 11) + i] = jpc_getmagctxno((refine ? JPC_REFINE : 0) | i);
}
}
for (unsigned i = 0; i < (1 << JPC_NMSEDEC_BITS); ++i) {
t = i * jpc_pow2i(-JPC_NMSEDEC_FRACBITS);
u = t;
v = t - 1.5f;
jpc_signmsedec[i] = jpc_dbltofix(floor((u * u - v * v) *
jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
jpc_pow2i(JPC_NMSEDEC_FRACBITS));
/* XXX - this calc is not correct */
jpc_signmsedec0[i] = jpc_dbltofix(floor((u * u) *
jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
jpc_pow2i(JPC_NMSEDEC_FRACBITS));
u = t - 1.0f;
if (i & (1 << (JPC_NMSEDEC_BITS - 1))) {
v = t - 1.5f;
} else {
v = t - 0.5f;
}
jpc_refnmsedec[i] = jpc_dbltofix(floor((u * u - v * v) *
jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
jpc_pow2i(JPC_NMSEDEC_FRACBITS));
/* XXX - this calc is not correct */
jpc_refnmsedec0[i] = jpc_dbltofix(floor((u * u) *
jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
jpc_pow2i(JPC_NMSEDEC_FRACBITS));
}
}
static uint_least8_t jpc_getzcctxno(unsigned f, enum jpc_tsfb_orient orient)
{
assert(orient < 4);
unsigned n = 0;
unsigned t;
unsigned hv;
unsigned h = ((f & JPC_WSIG) != 0) + ((f & JPC_ESIG) != 0);
unsigned v = ((f & JPC_NSIG) != 0) + ((f & JPC_SSIG) != 0);
const unsigned d = ((f & JPC_NWSIG) != 0) + ((f & JPC_NESIG) != 0) + ((f & JPC_SESIG) != 0) + ((f & JPC_SWSIG) != 0);
switch (orient) {
case JPC_TSFB_HL:
t = h;
h = v;
v = t;
/* fall through */
case JPC_TSFB_LL:
case JPC_TSFB_LH:
if (!h) {
if (!v) {
if (!d) {
n = 0;
} else if (d == 1) {
n = 1;
} else {
n = 2;
}
} else if (v == 1) {
n = 3;
} else {
n = 4;
}
} else if (h == 1) {
if (!v) {
if (!d) {
n = 5;
} else {
n = 6;
}
} else {
n = 7;
}
} else {
n = 8;
}
break;
case JPC_TSFB_HH:
hv = h + v;
if (!d) {
if (!hv) {
n = 0;
} else if (hv == 1) {
n = 1;
} else {
n = 2;
}
} else if (d == 1) {
if (!hv) {
n = 3;
} else if (hv == 1) {
n = 4;
} else {
n = 5;
}
} else if (d == 2) {
if (!hv) {
n = 6;
} else {
n = 7;
}
} else {
n = 8;
}
break;
default:
assert(false);
JAS_UNREACHABLE();
}
assert(n < JPC_NUMZCCTXS);
return JPC_ZCCTXNO + n;
}
static bool jpc_getspb(unsigned f)
{
int hc;
int vc;
bool n;
hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG), 1) -
JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) + ((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG), 1) -
JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) + ((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
if (!hc && !vc) {
n = 0;
} else {
n = (!(hc > 0 || (!hc && vc > 0)));
}
return n;
}
static uint_least8_t jpc_getscctxno(unsigned f)
{
int hc;
int vc;
hc = JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG | JPC_WSGN)) == JPC_WSIG),
1) - JAS_MIN(((f & (JPC_ESIG | JPC_ESGN)) == (JPC_ESIG | JPC_ESGN)) +
((f & (JPC_WSIG | JPC_WSGN)) == (JPC_WSIG | JPC_WSGN)), 1);
vc = JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG | JPC_SSGN)) == JPC_SSIG),
1) - JAS_MIN(((f & (JPC_NSIG | JPC_NSGN)) == (JPC_NSIG | JPC_NSGN)) +
((f & (JPC_SSIG | JPC_SSGN)) == (JPC_SSIG | JPC_SSGN)), 1);
assert(hc >= -1 && hc <= 1 && vc >= -1 && vc <= 1);
if (hc < 0) {
hc = -hc;
vc = -vc;
}
unsigned n;
if (!hc) {
if (vc == -1) {
n = 1;
} else if (!vc) {
n = 0;
} else {
n = 1;
}
} else {
assert(hc == 1);
if (vc == -1) {
n = 2;
} else if (!vc) {
n = 3;
} else {
n = 4;
}
}
assert(n < JPC_NUMSCCTXS);
return JPC_SCCTXNO + n;
}
static uint_least8_t jpc_getmagctxno(unsigned f)
{
unsigned n;
if (!(f & JPC_REFINE)) {
n = (f & (JPC_OTHSIGMSK)) ? 1 : 0;
} else {
n = 2;
}
assert(n < JPC_NUMMAGCTXS);
return JPC_MAGCTXNO + n;
}
static void jpc_initctxs(jpc_mqctx_t *ctxs)
{
jpc_mqctx_t *ctx;
ctx = ctxs;
for (unsigned i = 0; i < JPC_NUMCTXS; ++i) {
ctx->mps = 0;
switch (i) {
case JPC_UCTXNO:
ctx->ind = 46;
break;
case JPC_ZCCTXNO:
ctx->ind = 4;
break;
case JPC_AGGCTXNO:
ctx->ind = 3;
break;
default:
ctx->ind = 0;
break;
}
++ctx;
}
}
void jpc_initmqctxs()
{
jpc_initctxs(jpc_mqctxs);
}
/* Calculate the real quantity exp2(n), where x is an integer. */
static double jpc_pow2i(int n)
{
double x;
double a;
x = 1.0;
if (n < 0) {
a = 0.5;
n = -n;
} else {
a = 2.0;
}
while (--n >= 0) {
x *= a;
}
return x;
}