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jpc_qmfb.c
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/*
* 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__
*/
/*
* Quadrature Mirror-Image Filter Bank (QMFB) Library
*
* $Id: jpc_qmfb.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
*/
/******************************************************************************\
*
\******************************************************************************/
#undef WT_LENONE /* This is not needed due to normalization. */
#define WT_DOSCALE
/******************************************************************************\
* Includes.
\******************************************************************************/
#include <assert.h>
#include "jasper/jas_fix.h"
#include "jasper/jas_malloc.h"
#include "jasper/jas_math.h"
#include "jpc_qmfb.h"
#include "jpc_tsfb.h"
#include "jpc_math.h"
/******************************************************************************\
*
\******************************************************************************/
#define QMFB_SPLITBUFSIZE 4096
#define QMFB_JOINBUFSIZE 4096
int jpc_ft_analyze(int *a, int xstart, int ystart, int width, int height,
int stride);
int jpc_ft_synthesize(int *a, int xstart, int ystart, int width, int height,
int stride);
int jpc_ns_analyze(int *a, int xstart, int ystart, int width, int height,
int stride);
int jpc_ns_synthesize(int *a, int xstart, int ystart, int width,
int height, int stride);
void jpc_ft_fwdlift_row(jpc_fix_t *a, int numcols, int parity);
void jpc_ft_fwdlift_col(jpc_fix_t *a, int numrows, int stride,
int parity);
void jpc_ft_fwdlift_colgrp(jpc_fix_t *a, int numrows, int stride,
int parity);
void jpc_ft_fwdlift_colres(jpc_fix_t *a, int numrows, int numcols,
int stride, int parity);
void jpc_ft_invlift_row(jpc_fix_t *a, int numcols, int parity);
void jpc_ft_invlift_col(jpc_fix_t *a, int numrows, int stride,
int parity);
void jpc_ft_invlift_colgrp(jpc_fix_t *a, int numrows, int stride,
int parity);
void jpc_ft_invlift_colres(jpc_fix_t *a, int numrows, int numcols,
int stride, int parity);
void jpc_ns_fwdlift_row(jpc_fix_t *a, int numcols, int parity);
void jpc_ns_fwdlift_colgrp(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_ns_fwdlift_colres(jpc_fix_t *a, int numrows, int numcols, int stride,
int parity);
void jpc_ns_invlift_row(jpc_fix_t *a, int numcols, int parity);
void jpc_ns_invlift_colgrp(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_ns_invlift_colres(jpc_fix_t *a, int numrows, int numcols, int stride,
int parity);
void jpc_qmfb_split_row(jpc_fix_t *a, int numcols, int parity);
void jpc_qmfb_split_col(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_qmfb_split_colgrp(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_qmfb_split_colres(jpc_fix_t *a, int numrows, int numcols, int stride,
int parity);
void jpc_qmfb_join_row(jpc_fix_t *a, int numcols, int parity);
void jpc_qmfb_join_col(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_qmfb_join_colgrp(jpc_fix_t *a, int numrows, int stride, int parity);
void jpc_qmfb_join_colres(jpc_fix_t *a, int numrows, int numcols, int stride,
int parity);
double jpc_ft_lpenergywts[32] = {
1.2247448713915889,
1.6583123951776999,
2.3184046238739260,
3.2691742076555053,
4.6199296531440819,
6.5323713152269596,
9.2377452606141937,
13.0639951297449581,
18.4752262333915667,
26.1278968190610392,
36.9504194305524791,
52.2557819580462777,
73.9008347315741645,
104.5115624560829133,
147.8016689469569656,
209.0231247296646018,
295.6033378293900000,
418.0462494347059419,
591.2066756503630813,
836.0924988714708661,
/* approximations */
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661,
836.0924988714708661
};
double jpc_ft_hpenergywts[32] = {
0.8477912478906585,
0.9601432184835760,
1.2593401049756179,
1.7444107171191079,
2.4538713036750726,
3.4656517695088755,
4.8995276398597856,
6.9283970402160842,
9.7980274940131444,
13.8564306871112652,
19.5959265076535587,
27.7128159494245487,
39.1918369552045860,
55.4256262207444053,
78.3836719028959124,
110.8512517317256822,
156.7673435548526868,
221.7025033739244293,
313.5346870787551552,
443.4050067351659550,
/* approximations */
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550,
443.4050067351659550
};
double jpc_ns_lpenergywts[32] = {
1.4021081679297411,
2.0303718560817923,
2.9011625562785555,
4.1152851751758002,
5.8245108637728071,
8.2387599345725171,
11.6519546479210838,
16.4785606470644375,
23.3042776444606794,
32.9572515613740435,
46.6086013487782793,
65.9145194076860861,
93.2172084551803977,
131.8290408510004283,
186.4344176300625691,
263.6580819564562148,
372.8688353500955373,
527.3161639447193920,
745.7376707114038936,
1054.6323278917823245,
/* approximations follow */
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245,
1054.6323278917823245
};
double jpc_ns_hpenergywts[32] = {
1.4425227650161456,
1.9669426082455688,
2.8839248082788891,
4.1475208393432981,
5.8946497530677817,
8.3471789178590949,
11.8086046551047463,
16.7012780415647804,
23.6196657032246620,
33.4034255108592362,
47.2396388881632632,
66.8069597416714061,
94.4793162154500692,
133.6139330736999113,
188.9586372358249378,
267.2278678461869390,
377.9172750722391356,
534.4557359047058753,
755.8345502191498326,
1068.9114718353569060,
/* approximations follow */
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060,
1068.9114718353569060
};
jpc_qmfb2d_t jpc_ft_qmfb2d = {
jpc_ft_analyze,
jpc_ft_synthesize,
jpc_ft_lpenergywts,
jpc_ft_hpenergywts
};
jpc_qmfb2d_t jpc_ns_qmfb2d = {
jpc_ns_analyze,
jpc_ns_synthesize,
jpc_ns_lpenergywts,
jpc_ns_hpenergywts
};
/******************************************************************************\
* generic
\******************************************************************************/
void jpc_qmfb_split_row(jpc_fix_t *a, int numcols, int parity)
{
int bufsize = JPC_CEILDIVPOW2(numcols, 1);
#if !defined(HAVE_VLA)
jpc_fix_t splitbuf[QMFB_SPLITBUFSIZE];
#else
jpc_fix_t splitbuf[bufsize];
#endif
jpc_fix_t *buf = splitbuf;
register jpc_fix_t *srcptr;
register jpc_fix_t *dstptr;
register int n;
register int m;
int hstartcol;
#if !defined(HAVE_VLA)
/* Get a buffer. */
if (bufsize > QMFB_SPLITBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide in this case. */
abort();
}
}
#endif
if (numcols >= 2) {
hstartcol = (numcols + 1 - parity) >> 1;
m = (parity) ? hstartcol : (numcols - hstartcol);
/* Save the samples destined for the highpass channel. */
n = m;
dstptr = buf;
srcptr = &a[1 - parity];
while (n-- > 0) {
*dstptr = *srcptr;
++dstptr;
srcptr += 2;
}
/* Copy the appropriate samples into the lowpass channel. */
dstptr = &a[1 - parity];
srcptr = &a[2 - parity];
n = numcols - m - (!parity);
while (n-- > 0) {
*dstptr = *srcptr;
++dstptr;
srcptr += 2;
}
/* Copy the saved samples into the highpass channel. */
dstptr = &a[hstartcol];
srcptr = buf;
n = m;
while (n-- > 0) {
*dstptr = *srcptr;
++dstptr;
++srcptr;
}
}
#if !defined(HAVE_VLA)
/* If the split buffer was allocated on the heap, free this memory. */
if (buf != splitbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_split_col(jpc_fix_t *a, int numrows, int stride,
int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t splitbuf[QMFB_SPLITBUFSIZE];
#else
jpc_fix_t splitbuf[bufsize];
#endif
jpc_fix_t *buf = splitbuf;
register jpc_fix_t *srcptr;
register jpc_fix_t *dstptr;
register int n;
register int m;
int hstartcol;
#if !defined(HAVE_VLA)
/* Get a buffer. */
if (bufsize > QMFB_SPLITBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide in this case. */
abort();
}
}
#endif
if (numrows >= 2) {
hstartcol = (numrows + 1 - parity) >> 1;
m = (parity) ? hstartcol : (numrows - hstartcol);
/* Save the samples destined for the highpass channel. */
n = m;
dstptr = buf;
srcptr = &a[(1 - parity) * stride];
while (n-- > 0) {
*dstptr = *srcptr;
++dstptr;
srcptr += stride << 1;
}
/* Copy the appropriate samples into the lowpass channel. */
dstptr = &a[(1 - parity) * stride];
srcptr = &a[(2 - parity) * stride];
n = numrows - m - (!parity);
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += stride;
srcptr += stride << 1;
}
/* Copy the saved samples into the highpass channel. */
dstptr = &a[hstartcol * stride];
srcptr = buf;
n = m;
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += stride;
++srcptr;
}
}
#if !defined(HAVE_VLA)
/* If the split buffer was allocated on the heap, free this memory. */
if (buf != splitbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_split_colgrp(jpc_fix_t *a, int numrows, int stride,
int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t splitbuf[QMFB_SPLITBUFSIZE * JPC_QMFB_COLGRPSIZE];
#else
jpc_fix_t splitbuf[bufsize * JPC_QMFB_COLGRPSIZE];
#endif
jpc_fix_t *buf = splitbuf;
jpc_fix_t *srcptr;
jpc_fix_t *dstptr;
register jpc_fix_t *srcptr2;
register jpc_fix_t *dstptr2;
register int n;
register int i;
int m;
int hstartcol;
#if !defined(HAVE_VLA)
/* Get a buffer. */
if (bufsize > QMFB_SPLITBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide in this case. */
abort();
}
}
#endif
if (numrows >= 2) {
hstartcol = (numrows + 1 - parity) >> 1;
m = (parity) ? hstartcol : (numrows - hstartcol);
/* Save the samples destined for the highpass channel. */
n = m;
dstptr = buf;
srcptr = &a[(1 - parity) * stride];
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += JPC_QMFB_COLGRPSIZE;
srcptr += stride << 1;
}
/* Copy the appropriate samples into the lowpass channel. */
dstptr = &a[(1 - parity) * stride];
srcptr = &a[(2 - parity) * stride];
n = numrows - m - (!parity);
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += stride;
srcptr += stride << 1;
}
/* Copy the saved samples into the highpass channel. */
dstptr = &a[hstartcol * stride];
srcptr = buf;
n = m;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += stride;
srcptr += JPC_QMFB_COLGRPSIZE;
}
}
#if !defined(HAVE_VLA)
/* If the split buffer was allocated on the heap, free this memory. */
if (buf != splitbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_split_colres(jpc_fix_t *a, int numrows, int numcols,
int stride, int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t splitbuf[QMFB_SPLITBUFSIZE * JPC_QMFB_COLGRPSIZE];
#else
jpc_fix_t splitbuf[bufsize * numcols];
#endif
jpc_fix_t *buf = splitbuf;
jpc_fix_t *srcptr;
jpc_fix_t *dstptr;
register jpc_fix_t *srcptr2;
register jpc_fix_t *dstptr2;
register int n;
register int i;
int m;
int hstartcol;
#if !defined(HAVE_VLA)
/* Get a buffer. */
if (bufsize > QMFB_SPLITBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide in this case. */
abort();
}
}
#endif
if (numrows >= 2) {
hstartcol = (numrows + 1 - parity) >> 1;
m = (parity) ? hstartcol : (numrows - hstartcol);
/* Save the samples destined for the highpass channel. */
n = m;
dstptr = buf;
srcptr = &a[(1 - parity) * stride];
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += numcols;
srcptr += stride << 1;
}
/* Copy the appropriate samples into the lowpass channel. */
dstptr = &a[(1 - parity) * stride];
srcptr = &a[(2 - parity) * stride];
n = numrows - m - (!parity);
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += stride;
srcptr += stride << 1;
}
/* Copy the saved samples into the highpass channel. */
dstptr = &a[hstartcol * stride];
srcptr = buf;
n = m;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += stride;
srcptr += numcols;
}
}
#if !defined(HAVE_VLA)
/* If the split buffer was allocated on the heap, free this memory. */
if (buf != splitbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_join_row(jpc_fix_t *a, int numcols, int parity)
{
int bufsize = JPC_CEILDIVPOW2(numcols, 1);
#if !defined(HAVE_VLA)
jpc_fix_t joinbuf[QMFB_JOINBUFSIZE];
#else
jpc_fix_t joinbuf[bufsize];
#endif
jpc_fix_t *buf = joinbuf;
register jpc_fix_t *srcptr;
register jpc_fix_t *dstptr;
register int n;
int hstartcol;
#if !defined(HAVE_VLA)
/* Allocate memory for the join buffer from the heap. */
if (bufsize > QMFB_JOINBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide. */
abort();
}
}
#endif
hstartcol = (numcols + 1 - parity) >> 1;
/* Save the samples from the lowpass channel. */
n = hstartcol;
srcptr = &a[0];
dstptr = buf;
while (n-- > 0) {
*dstptr = *srcptr;
++srcptr;
++dstptr;
}
/* Copy the samples from the highpass channel into place. */
srcptr = &a[hstartcol];
dstptr = &a[1 - parity];
n = numcols - hstartcol;
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += 2;
++srcptr;
}
/* Copy the samples from the lowpass channel into place. */
srcptr = buf;
dstptr = &a[parity];
n = hstartcol;
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += 2;
++srcptr;
}
#if !defined(HAVE_VLA)
/* If the join buffer was allocated on the heap, free this memory. */
if (buf != joinbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_join_col(jpc_fix_t *a, int numrows, int stride,
int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t joinbuf[QMFB_JOINBUFSIZE];
#else
jpc_fix_t joinbuf[bufsize];
#endif
jpc_fix_t *buf = joinbuf;
register jpc_fix_t *srcptr;
register jpc_fix_t *dstptr;
register int n;
int hstartcol;
#if !defined(HAVE_VLA)
/* Allocate memory for the join buffer from the heap. */
if (bufsize > QMFB_JOINBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide. */
abort();
}
}
#endif
hstartcol = (numrows + 1 - parity) >> 1;
/* Save the samples from the lowpass channel. */
n = hstartcol;
srcptr = &a[0];
dstptr = buf;
while (n-- > 0) {
*dstptr = *srcptr;
srcptr += stride;
++dstptr;
}
/* Copy the samples from the highpass channel into place. */
srcptr = &a[hstartcol * stride];
dstptr = &a[(1 - parity) * stride];
n = numrows - hstartcol;
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += 2 * stride;
srcptr += stride;
}
/* Copy the samples from the lowpass channel into place. */
srcptr = buf;
dstptr = &a[parity * stride];
n = hstartcol;
while (n-- > 0) {
*dstptr = *srcptr;
dstptr += 2 * stride;
++srcptr;
}
#if !defined(HAVE_VLA)
/* If the join buffer was allocated on the heap, free this memory. */
if (buf != joinbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_join_colgrp(jpc_fix_t *a, int numrows, int stride,
int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t joinbuf[QMFB_JOINBUFSIZE * JPC_QMFB_COLGRPSIZE];
#else
jpc_fix_t joinbuf[bufsize * JPC_QMFB_COLGRPSIZE];
#endif
jpc_fix_t *buf = joinbuf;
jpc_fix_t *srcptr;
jpc_fix_t *dstptr;
register jpc_fix_t *srcptr2;
register jpc_fix_t *dstptr2;
register int n;
register int i;
int hstartcol;
#if !defined(HAVE_VLA)
/* Allocate memory for the join buffer from the heap. */
if (bufsize > QMFB_JOINBUFSIZE) {
if (!(buf = jas_alloc2(bufsize, JPC_QMFB_COLGRPSIZE * sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide. */
abort();
}
}
#endif
hstartcol = (numrows + 1 - parity) >> 1;
/* Save the samples from the lowpass channel. */
n = hstartcol;
srcptr = &a[0];
dstptr = buf;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
srcptr += stride;
dstptr += JPC_QMFB_COLGRPSIZE;
}
/* Copy the samples from the highpass channel into place. */
srcptr = &a[hstartcol * stride];
dstptr = &a[(1 - parity) * stride];
n = numrows - hstartcol;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += 2 * stride;
srcptr += stride;
}
/* Copy the samples from the lowpass channel into place. */
srcptr = buf;
dstptr = &a[parity * stride];
n = hstartcol;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < JPC_QMFB_COLGRPSIZE; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += 2 * stride;
srcptr += JPC_QMFB_COLGRPSIZE;
}
#if !defined(HAVE_VLA)
/* If the join buffer was allocated on the heap, free this memory. */
if (buf != joinbuf) {
jas_free(buf);
}
#endif
}
void jpc_qmfb_join_colres(jpc_fix_t *a, int numrows, int numcols,
int stride, int parity)
{
int bufsize = JPC_CEILDIVPOW2(numrows, 1);
#if !defined(HAVE_VLA)
jpc_fix_t joinbuf[QMFB_JOINBUFSIZE * JPC_QMFB_COLGRPSIZE];
#else
jpc_fix_t joinbuf[bufsize * numcols];
#endif
jpc_fix_t *buf = joinbuf;
jpc_fix_t *srcptr;
jpc_fix_t *dstptr;
register jpc_fix_t *srcptr2;
register jpc_fix_t *dstptr2;
register int n;
register int i;
int hstartcol;
#if !defined(HAVE_VLA)
/* Allocate memory for the join buffer from the heap. */
if (bufsize > QMFB_JOINBUFSIZE) {
if (!(buf = jas_alloc3(bufsize, numcols, sizeof(jpc_fix_t)))) {
/* We have no choice but to commit suicide. */
abort();
}
}
#endif
hstartcol = (numrows + 1 - parity) >> 1;
/* Save the samples from the lowpass channel. */
n = hstartcol;
srcptr = &a[0];
dstptr = buf;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
srcptr += stride;
dstptr += numcols;
}
/* Copy the samples from the highpass channel into place. */
srcptr = &a[hstartcol * stride];
dstptr = &a[(1 - parity) * stride];
n = numrows - hstartcol;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += 2 * stride;
srcptr += stride;
}
/* Copy the samples from the lowpass channel into place. */
srcptr = buf;
dstptr = &a[parity * stride];
n = hstartcol;
while (n-- > 0) {
dstptr2 = dstptr;
srcptr2 = srcptr;
for (i = 0; i < numcols; ++i) {
*dstptr2 = *srcptr2;
++dstptr2;
++srcptr2;
}
dstptr += 2 * stride;
srcptr += numcols;
}
#if !defined(HAVE_VLA)
/* If the join buffer was allocated on the heap, free this memory. */
if (buf != joinbuf) {
jas_free(buf);
}
#endif
}
/******************************************************************************\
* 5/3 transform
\******************************************************************************/
void jpc_ft_fwdlift_row(jpc_fix_t *a, int numcols, int parity)
{
register jpc_fix_t *lptr;
register jpc_fix_t *hptr;
register int n;
int llen;
llen = (numcols + 1 - parity) >> 1;
if (numcols > 1) {
/* Apply the first lifting step. */
lptr = &a[0];
hptr = &a[llen];
if (parity) {
hptr[0] -= lptr[0];
++hptr;
}
n = numcols - llen - parity - (parity == (numcols & 1));
while (n-- > 0) {
hptr[0] -= (lptr[0] + lptr[1]) >> 1;
++hptr;
++lptr;
}
if (parity == (numcols & 1)) {
hptr[0] -= lptr[0];
}
/* Apply the second lifting step. */
lptr = &a[0];
hptr = &a[llen];
if (!parity) {
lptr[0] += (hptr[0] + 1) >> 1;
++lptr;
}
n = llen - (!parity) - (parity != (numcols & 1));
while (n-- > 0) {
lptr[0] += (hptr[0] + hptr[1] + 2) >> 2;
++lptr;
++hptr;
}
if (parity != (numcols & 1)) {
lptr[0] += (hptr[0] + 1) >> 1;
}
} else {
if (parity) {
lptr = &a[0];
lptr[0] <<= 1;
}
}
}
void jpc_ft_fwdlift_col(jpc_fix_t *a, int numrows, int stride, int parity)
{
jpc_fix_t *lptr;
jpc_fix_t *hptr;
#if 0
register jpc_fix_t *lptr2;
register jpc_fix_t *hptr2;
register int i;
#endif
register int n;
int llen;
llen = (numrows + 1 - parity) >> 1;
if (numrows > 1) {
/* Apply the first lifting step. */
lptr = &a[0];
hptr = &a[llen * stride];
if (parity) {