/src/jasper/src/libjasper/jpc/jpc_t1cod.c

Source
/*
 * 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"

#include <stdlib.h>
#include <assert.h>
#include <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;
  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();
}

/******************************************************************************\
* 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;

  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;
  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;
}

Coverage Report

Created: 2026-01-20 07:37

Line	Count	Source
1		/*
2		* Copyright (c) 1999-2000 Image Power, Inc. and the University of
3		* British Columbia.
4		* Copyright (c) 2001-2003 Michael David Adams.
5		* All rights reserved.
6		*/
7
8		/* __START_OF_JASPER_LICENSE__
9		*
10		* JasPer License Version 2.0
11		*
12		* Copyright (c) 2001-2006 Michael David Adams
13		* Copyright (c) 1999-2000 Image Power, Inc.
14		* Copyright (c) 1999-2000 The University of British Columbia
15		*
16		* All rights reserved.
17		*
18		* Permission is hereby granted, free of charge, to any person (the
19		* "User") obtaining a copy of this software and associated documentation
20		* files (the "Software"), to deal in the Software without restriction,
21		* including without limitation the rights to use, copy, modify, merge,
22		* publish, distribute, and/or sell copies of the Software, and to permit
23		* persons to whom the Software is furnished to do so, subject to the
24		* following conditions:
25		*
26		* 1. The above copyright notices and this permission notice (which
27		* includes the disclaimer below) shall be included in all copies or
28		* substantial portions of the Software.
29		*
30		* 2. The name of a copyright holder shall not be used to endorse or
31		* promote products derived from the Software without specific prior
32		* written permission.
33		*
34		* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
35		* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
36		* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
37		* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
38		* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
39		* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
40		* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
41		* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
42		* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
43		* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
44		* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
45		* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
46		* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
47		* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
48		* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
49		* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
50		* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
51		* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
52		* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
53		* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
54		* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
55		* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
56		* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
57		* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
58		* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
59		* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
60		*
61		* __END_OF_JASPER_LICENSE__
62		*/
63
64		/*
65		* $Id$
66		*/
67
68		/******************************************************************************\
69		* Includes.
70		\******************************************************************************/
71
72		#include "jpc_t1cod.h"
73		#include "jpc_cod.h"
74		#include "jpc_cs.h"
75		#include "jpc_mqcod.h"
76		#include "jpc_tsfb.h"
77
78		#include "jasper/jas_math.h"
79
80		#include <stdlib.h>
81		#include <assert.h>
82		#include <math.h>
83
84		JAS_ATTRIBUTE_CONST
85		static double jpc_pow2i(int n);
86
87		/******************************************************************************\
88		* Global data.
89		\******************************************************************************/
90
91		uint_least8_t jpc_zcctxnolut[4 * 256];
92		bool jpc_spblut[256];
93		uint_least8_t jpc_scctxnolut[256];
94		uint_least8_t jpc_magctxnolut[4096];
95
96		jpc_fix_t jpc_signmsedec[1 << JPC_NMSEDEC_BITS];
97		jpc_fix_t jpc_refnmsedec[1 << JPC_NMSEDEC_BITS];
98		jpc_fix_t jpc_signmsedec0[1 << JPC_NMSEDEC_BITS];
99		jpc_fix_t jpc_refnmsedec0[1 << JPC_NMSEDEC_BITS];
100
101		jpc_mqctx_t jpc_mqctxs[JPC_NUMCTXS];
102
103		/******************************************************************************\
104		*
105		\******************************************************************************/
106
107		JAS_ATTRIBUTE_CONST
108		static uint_least8_t jpc_getzcctxno(unsigned f, enum jpc_tsfb_orient orient);
109
110		JAS_ATTRIBUTE_CONST
111		static bool jpc_getspb(unsigned f);
112
113		JAS_ATTRIBUTE_CONST
114		static uint_least8_t jpc_getscctxno(unsigned f);
115
116		JAS_ATTRIBUTE_CONST
117		static uint_least8_t jpc_getmagctxno(unsigned f);
118
119		/******************************************************************************\
120		* Code.
121		\******************************************************************************/
122
123		enum jpc_passtype JPC_PASSTYPE(unsigned passno)
124	4.36M	{
125	4.36M	unsigned passtype;
126	4.36M	switch (passno % 3) {
127	1.65M	case 0:
128	1.65M	passtype = JPC_CLNPASS;
129	1.65M	break;
130	1.43M	case 1:
131	1.43M	passtype = JPC_SIGPASS;
132	1.43M	break;
133	1.27M	case 2:
134	1.27M	passtype = JPC_REFPASS;
135	1.27M	break;
136	0	default:
137	0	assert(0);
138	0	JAS_UNREACHABLE();
139	4.36M	}
140	4.36M	return passtype;
141	4.36M	}
142
143		unsigned JPC_NOMINALGAIN(unsigned qmfbid, unsigned numlvls, unsigned lvlno, enum jpc_tsfb_orient orient)
144	339k	{
145	339k	JAS_UNUSED(numlvls);
146
147	339k	if (qmfbid == JPC_COX_INS) {
148	170k	return 0;
149	170k	}
150	339k	assert(qmfbid == JPC_COX_RFT);
151	168k	if (lvlno == 0) {
152	11.3k	assert(orient == JPC_TSFB_LL);
153	11.3k	return 0;
154	157k	} else {
155	157k	switch (orient) {
156	52.4k	case JPC_TSFB_LH:
157	104k	case JPC_TSFB_HL:
158	104k	return 1;
159	52.4k	case JPC_TSFB_HH:
160	52.4k	return 2;
161	0	default:
162	0	assert(false);
163	0	JAS_UNREACHABLE();
164	157k	}
165	157k	}
166	0	JAS_UNREACHABLE();
167	0	}
168
169		/******************************************************************************\
170		* Coding pass related functions.
171		\******************************************************************************/
172
173		enum jpc_segtype JPC_SEGTYPE(unsigned passno, unsigned firstpassno, bool bypass)
174	3.40M	{
175	3.40M	if (bypass) {
176	367k	enum jpc_passtype passtype = JPC_PASSTYPE(passno);
177	367k	if (passtype == JPC_CLNPASS) {
178	196k	return JPC_SEG_MQ;
179	196k	}
180	170k	return ((passno < firstpassno + 10) ? JPC_SEG_MQ : JPC_SEG_RAW);
181	3.03M	} else {
182	3.03M	return JPC_SEG_MQ;
183	3.03M	}
184	3.40M	}
185
186		unsigned JPC_SEGPASSCNT(unsigned passno, unsigned firstpassno, unsigned numpasses, bool bypass, bool termall)
187	3.55M	{
188	3.55M	unsigned ret;
189
190	3.55M	if (termall) {
191	175k	ret = 1;
192	3.37M	} else if (bypass) {
193	281k	if (passno < firstpassno + 10) {
194	87.2k	ret = 10 - (passno - firstpassno);
195	194k	} else {
196	194k	enum jpc_passtype passtype = JPC_PASSTYPE(passno);
197	194k	switch (passtype) {
198	85.3k	case JPC_SIGPASS:
199	85.3k	ret = 2;
200	85.3k	break;
201	34.7k	case JPC_REFPASS:
202	34.7k	ret = 1;
203	34.7k	break;
204	74.4k	case JPC_CLNPASS:
205	74.4k	ret = 1;
206	74.4k	break;
207	0	default:
208	0	assert(0);
209	0	JAS_UNREACHABLE();
210	194k	}
211	194k	}
212	3.09M	} else {
213	3.09M	ret = JPC_PREC * 3 - 2;
214	3.09M	}
215	3.55M	ret = JAS_MIN(ret, numpasses - passno);
216	3.55M	return ret;
217	3.55M	}
218
219		bool JPC_ISTERMINATED(unsigned passno, unsigned firstpassno, unsigned numpasses, bool termall,
220		bool lazy)
221	2.95M	{
222	2.95M	if (passno - firstpassno == numpasses - 1) {
223	111k	return true;
224	2.84M	} else {
225	2.84M	unsigned n = JPC_SEGPASSCNT(passno, firstpassno, numpasses, lazy, termall);
226	2.84M	return n <= 1;
227	2.84M	}
228	2.95M	}
229
230		/******************************************************************************\
231		* Lookup table code.
232		\******************************************************************************/
233
234		void jpc_initluts()
235	9	{
236	9	float u;
237	9	float v;
238	9	float t;
239
240	45	for (unsigned orient = 0; orient < 4; ++orient) {
241	9.25k	for (unsigned i = 0; i < 256; ++i) {
242	9.21k	jpc_zcctxnolut[(orient << 8) \| i] = jpc_getzcctxno(i, orient);
243	9.21k	}
244	36	}
245
246	2.31k	for (unsigned i = 0; i < 256; ++i) {
247	2.30k	jpc_spblut[i] = jpc_getspb(i << 4);
248	2.30k	}
249
250	2.31k	for (unsigned i = 0; i < 256; ++i) {
251	2.30k	jpc_scctxnolut[i] = jpc_getscctxno(i << 4);
252	2.30k	}
253
254	27	for (unsigned refine = 0; refine < 2; ++refine) {
255	36.8k	for (unsigned i = 0; i < 2048; ++i) {
256	36.8k	jpc_magctxnolut[(refine << 11) + i] = jpc_getmagctxno((refine ? JPC_REFINE : 0) \| i);
257	36.8k	}
258	18	}
259
260	1.16k	for (unsigned i = 0; i < (1 << JPC_NMSEDEC_BITS); ++i) {
261	1.15k	t = i * jpc_pow2i(-JPC_NMSEDEC_FRACBITS);
262	1.15k	u = t;
263	1.15k	v = t - 1.5f;
264	1.15k	jpc_signmsedec[i] = jpc_dbltofix(floor((u * u - v * v) *
265	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
266	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS));
267		/* XXX - this calc is not correct */
268	1.15k	jpc_signmsedec0[i] = jpc_dbltofix(floor((u * u) *
269	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
270	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS));
271	1.15k	u = t - 1.0f;
272	1.15k	if (i & (1 << (JPC_NMSEDEC_BITS - 1))) {
273	576	v = t - 1.5f;
274	576	} else {
275	576	v = t - 0.5f;
276	576	}
277	1.15k	jpc_refnmsedec[i] = jpc_dbltofix(floor((u * u - v * v) *
278	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
279	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS));
280		/* XXX - this calc is not correct */
281	1.15k	jpc_refnmsedec0[i] = jpc_dbltofix(floor((u * u) *
282	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS) + 0.5) /
283	1.15k	jpc_pow2i(JPC_NMSEDEC_FRACBITS));
284	1.15k	}
285	9	}
286
287		static uint_least8_t jpc_getzcctxno(unsigned f, enum jpc_tsfb_orient orient)
288	9.21k	{
289	9.21k	assert(orient < 4);
290
291	9.21k	unsigned n;
292	9.21k	unsigned t;
293	9.21k	unsigned hv;
294
295	9.21k	unsigned h = ((f & JPC_WSIG) != 0) + ((f & JPC_ESIG) != 0);
296	9.21k	unsigned v = ((f & JPC_NSIG) != 0) + ((f & JPC_SSIG) != 0);
297	9.21k	const unsigned d = ((f & JPC_NWSIG) != 0) + ((f & JPC_NESIG) != 0) + ((f & JPC_SESIG) != 0) + ((f & JPC_SWSIG) != 0);
298	9.21k	switch (orient) {
299	2.30k	case JPC_TSFB_HL:
300	2.30k	t = h;
301	2.30k	h = v;
302	2.30k	v = t;
303		/* fall through */
304	4.60k	case JPC_TSFB_LL:
305	6.91k	case JPC_TSFB_LH:
306	6.91k	if (!h) {
307	1.72k	if (!v) {
308	432	if (!d) {
309	27	n = 0;
310	405	} else if (d == 1) {
311	108	n = 1;
312	297	} else {
313	297	n = 2;
314	297	}
315	1.29k	} else if (v == 1) {
316	864	n = 3;
317	864	} else {
318	432	n = 4;
319	432	}
320	5.18k	} else if (h == 1) {
321	3.45k	if (!v) {
322	864	if (!d) {
323	54	n = 5;
324	810	} else {
325	810	n = 6;
326	810	}
327	2.59k	} else {
328	2.59k	n = 7;
329	2.59k	}
330	3.45k	} else {
331	1.72k	n = 8;
332	1.72k	}
333	6.91k	break;
334	2.30k	case JPC_TSFB_HH:
335	2.30k	hv = h + v;
336	2.30k	if (!d) {
337	144	if (!hv) {
338	9	n = 0;
339	135	} else if (hv == 1) {
340	36	n = 1;
341	99	} else {
342	99	n = 2;
343	99	}
344	2.16k	} else if (d == 1) {
345	576	if (!hv) {
346	36	n = 3;
347	540	} else if (hv == 1) {
348	144	n = 4;
349	396	} else {
350	396	n = 5;
351	396	}
352	1.58k	} else if (d == 2) {
353	864	if (!hv) {
354	54	n = 6;
355	810	} else {
356	810	n = 7;
357	810	}
358	864	} else {
359	720	n = 8;
360	720	}
361	2.30k	break;
362
363	0	default:
364	0	assert(false);
365	0	JAS_UNREACHABLE();
366	9.21k	}
367	9.21k	assert(n < JPC_NUMZCCTXS);
368	9.21k	return JPC_ZCCTXNO + n;
369	9.21k	}
370
371		static bool jpc_getspb(unsigned f)
372	2.30k	{
373	2.30k	int hc;
374	2.30k	int vc;
375	2.30k	bool n;
376
377	2.30k	hc = JAS_MIN(((f & (JPC_ESIG \| JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG \| JPC_WSGN)) == JPC_WSIG), 1) -
378	2.30k	JAS_MIN(((f & (JPC_ESIG \| JPC_ESGN)) == (JPC_ESIG \| JPC_ESGN)) + ((f & (JPC_WSIG \| JPC_WSGN)) == (JPC_WSIG \| JPC_WSGN)), 1);
379	2.30k	vc = JAS_MIN(((f & (JPC_NSIG \| JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG \| JPC_SSGN)) == JPC_SSIG), 1) -
380	2.30k	JAS_MIN(((f & (JPC_NSIG \| JPC_NSGN)) == (JPC_NSIG \| JPC_NSGN)) + ((f & (JPC_SSIG \| JPC_SSGN)) == (JPC_SSIG \| JPC_SSGN)), 1);
381	2.30k	if (!hc && !vc) {
382	324	n = 0;
383	1.98k	} else {
384	1.98k	n = (!(hc > 0 \|\| (!hc && vc > 0)));
385	1.98k	}
386	2.30k	return n;
387	2.30k	}
388
389		static uint_least8_t jpc_getscctxno(unsigned f)
390	2.30k	{
391	2.30k	int hc;
392	2.30k	int vc;
393
394	2.30k	hc = JAS_MIN(((f & (JPC_ESIG \| JPC_ESGN)) == JPC_ESIG) + ((f & (JPC_WSIG \| JPC_WSGN)) == JPC_WSIG),
395	2.30k	1) - JAS_MIN(((f & (JPC_ESIG \| JPC_ESGN)) == (JPC_ESIG \| JPC_ESGN)) +
396	2.30k	((f & (JPC_WSIG \| JPC_WSGN)) == (JPC_WSIG \| JPC_WSGN)), 1);
397	2.30k	vc = JAS_MIN(((f & (JPC_NSIG \| JPC_NSGN)) == JPC_NSIG) + ((f & (JPC_SSIG \| JPC_SSGN)) == JPC_SSIG),
398	2.30k	1) - JAS_MIN(((f & (JPC_NSIG \| JPC_NSGN)) == (JPC_NSIG \| JPC_NSGN)) +
399	2.30k	((f & (JPC_SSIG \| JPC_SSGN)) == (JPC_SSIG \| JPC_SSGN)), 1);
400	2.30k	assert(hc >= -1 && hc <= 1 && vc >= -1 && vc <= 1);
401	2.30k	if (hc < 0) {
402	720	hc = -hc;
403	720	vc = -vc;
404	720	}
405
406	2.30k	unsigned n;
407	2.30k	if (!hc) {
408	864	if (vc == -1) {
409	270	n = 1;
410	594	} else if (!vc) {
411	324	n = 0;
412	324	} else {
413	270	n = 1;
414	270	}
415	1.44k	} else {
416	1.44k	assert(hc == 1);
417
418	1.44k	if (vc == -1) {
419	450	n = 2;
420	990	} else if (!vc) {
421	540	n = 3;
422	540	} else {
423	450	n = 4;
424	450	}
425	1.44k	}
426	2.30k	assert(n < JPC_NUMSCCTXS);
427	2.30k	return JPC_SCCTXNO + n;
428	2.30k	}
429
430		static uint_least8_t jpc_getmagctxno(unsigned f)
431	36.8k	{
432	36.8k	unsigned n;
433
434	36.8k	if (!(f & JPC_REFINE)) {
435	18.4k	n = (f & (JPC_OTHSIGMSK)) ? 1 : 0;
436	18.4k	} else {
437	18.4k	n = 2;
438	18.4k	}
439
440	36.8k	assert(n < JPC_NUMMAGCTXS);
441	36.8k	return JPC_MAGCTXNO + n;
442	36.8k	}
443
444		static void jpc_initctxs(jpc_mqctx_t *ctxs)
445	9	{
446	9	jpc_mqctx_t *ctx;
447
448	9	ctx = ctxs;
449	180	for (unsigned i = 0; i < JPC_NUMCTXS; ++i) {
450	171	ctx->mps = 0;
451	171	switch (i) {
452	9	case JPC_UCTXNO:
453	9	ctx->ind = 46;
454	9	break;
455	9	case JPC_ZCCTXNO:
456	9	ctx->ind = 4;
457	9	break;
458	9	case JPC_AGGCTXNO:
459	9	ctx->ind = 3;
460	9	break;
461	144	default:
462	144	ctx->ind = 0;
463	144	break;
464	171	}
465	171	++ctx;
466	171	}
467	9	}
468
469		void jpc_initmqctxs()
470	9	{
471	9	jpc_initctxs(jpc_mqctxs);
472	9	}
473
474		/* Calculate the real quantity exp2(n), where x is an integer. */
475		static double jpc_pow2i(int n)
476	2.30k	{
477	2.30k	double x;
478	2.30k	double a;
479
480	2.30k	x = 1.0;
481	2.30k	if (n < 0) {
482	1.15k	a = 0.5;
483	1.15k	n = -n;
484	1.15k	} else {
485	1.15k	a = 2.0;
486	1.15k	}
487	16.1k	while (--n >= 0) {
488	13.8k	x *= a;
489	13.8k	}
490	2.30k	return x;
491	2.30k	}