mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
d1974e05d1
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
387 lines
9.4 KiB
C
387 lines
9.4 KiB
C
/*
|
|
* Discrete wavelet transform
|
|
* Copyright (c) 2007 Kamil Nowosad
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* Discrete wavelet transform
|
|
* @file
|
|
* @author Kamil Nowosad
|
|
*/
|
|
|
|
#include "j2k_dwt.h"
|
|
|
|
static const float scale97[] = {1.625786, 1.230174};
|
|
|
|
static inline void extend53(int *p, int i0, int i1)
|
|
{
|
|
p[i0 - 1] = p[i0 + 1];
|
|
p[i1 ] = p[i1 - 2];
|
|
p[i0 - 2] = p[i0 + 2];
|
|
p[i1 + 1] = p[i1 - 3];
|
|
}
|
|
|
|
static inline void extend97(float *p, int i0, int i1)
|
|
{
|
|
int i;
|
|
|
|
for (i = 1; i <= 4; i++){
|
|
p[i0 - i] = p[i0 + i];
|
|
p[i1 + i - 1] = p[i1 - i - 1];
|
|
}
|
|
}
|
|
|
|
static void sd_1d53(int *p, int i0, int i1)
|
|
{
|
|
int i;
|
|
|
|
if (i1 == i0 + 1)
|
|
return;
|
|
|
|
extend53(p, i0, i1);
|
|
|
|
for (i = (i0+1)/2 - 1; i < (i1+1)/2; i++)
|
|
p[2*i+1] -= (p[2*i] + p[2*i+2]) >> 1;
|
|
for (i = (i0+1)/2; i < (i1+1)/2; i++)
|
|
p[2*i] += (p[2*i-1] + p[2*i+1] + 2) >> 2;
|
|
}
|
|
|
|
static void dwt_encode53(DWTContext *s, int *t)
|
|
{
|
|
int lev,
|
|
w = s->linelen[s->ndeclevels-1][0];
|
|
int *line = s->linebuf;
|
|
line += 3;
|
|
|
|
for (lev = s->ndeclevels-1; lev >= 0; lev--){
|
|
int lh = s->linelen[lev][0],
|
|
lv = s->linelen[lev][1],
|
|
mh = s->mod[lev][0],
|
|
mv = s->mod[lev][1],
|
|
lp;
|
|
int *l;
|
|
|
|
// HOR_SD
|
|
l = line + mh;
|
|
for (lp = 0; lp < lv; lp++){
|
|
int i, j = 0;
|
|
|
|
for (i = 0; i < lh; i++)
|
|
l[i] = t[w*lp + i];
|
|
|
|
sd_1d53(line, mh, mh + lh);
|
|
|
|
// copy back and deinterleave
|
|
for (i = mh; i < lh; i+=2, j++)
|
|
t[w*lp + j] = l[i];
|
|
for (i = 1-mh; i < lh; i+=2, j++)
|
|
t[w*lp + j] = l[i];
|
|
}
|
|
|
|
// VER_SD
|
|
l = line + mv;
|
|
for (lp = 0; lp < lh; lp++) {
|
|
int i, j = 0;
|
|
|
|
for (i = 0; i < lv; i++)
|
|
l[i] = t[w*i + lp];
|
|
|
|
sd_1d53(line, mv, mv + lv);
|
|
|
|
// copy back and deinterleave
|
|
for (i = mv; i < lv; i+=2, j++)
|
|
t[w*j + lp] = l[i];
|
|
for (i = 1-mv; i < lv; i+=2, j++)
|
|
t[w*j + lp] = l[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sd_1d97(float *p, int i0, int i1)
|
|
{
|
|
int i;
|
|
|
|
if (i1 == i0 + 1)
|
|
return;
|
|
|
|
extend97(p, i0, i1);
|
|
i0++; i1++;
|
|
|
|
for (i = i0/2 - 2; i < i1/2 + 1; i++)
|
|
p[2*i+1] -= 1.586134 * (p[2*i] + p[2*i+2]);
|
|
for (i = i0/2 - 1; i < i1/2 + 1; i++)
|
|
p[2*i] -= 0.052980 * (p[2*i-1] + p[2*i+1]);
|
|
for (i = i0/2 - 1; i < i1/2; i++)
|
|
p[2*i+1] += 0.882911 * (p[2*i] + p[2*i+2]);
|
|
for (i = i0/2; i < i1/2; i++)
|
|
p[2*i] += 0.443506 * (p[2*i-1] + p[2*i+1]);
|
|
}
|
|
|
|
static void dwt_encode97(DWTContext *s, int *t)
|
|
{
|
|
int lev,
|
|
w = s->linelen[s->ndeclevels-1][0];
|
|
float *line = s->linebuf;
|
|
line += 5;
|
|
|
|
for (lev = s->ndeclevels-1; lev >= 0; lev--){
|
|
int lh = s->linelen[lev][0],
|
|
lv = s->linelen[lev][1],
|
|
mh = s->mod[lev][0],
|
|
mv = s->mod[lev][1],
|
|
lp;
|
|
float *l;
|
|
|
|
// HOR_SD
|
|
l = line + mh;
|
|
for (lp = 0; lp < lv; lp++){
|
|
int i, j = 0;
|
|
|
|
for (i = 0; i < lh; i++)
|
|
l[i] = t[w*lp + i];
|
|
|
|
sd_1d97(line, mh, mh + lh);
|
|
|
|
// copy back and deinterleave
|
|
for (i = mh; i < lh; i+=2, j++)
|
|
t[w*lp + j] = scale97[mh] * l[i] / 2;
|
|
for (i = 1-mh; i < lh; i+=2, j++)
|
|
t[w*lp + j] = scale97[mh] * l[i] / 2;
|
|
}
|
|
|
|
// VER_SD
|
|
l = line + mv;
|
|
for (lp = 0; lp < lh; lp++) {
|
|
int i, j = 0;
|
|
|
|
for (i = 0; i < lv; i++)
|
|
l[i] = t[w*i + lp];
|
|
|
|
sd_1d97(line, mv, mv + lv);
|
|
|
|
// copy back and deinterleave
|
|
for (i = mv; i < lv; i+=2, j++)
|
|
t[w*j + lp] = scale97[mv] * l[i] / 2;
|
|
for (i = 1-mv; i < lv; i+=2, j++)
|
|
t[w*j + lp] = scale97[mv] * l[i] / 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sr_1d53(int *p, int i0, int i1)
|
|
{
|
|
int i;
|
|
|
|
if (i1 == i0 + 1)
|
|
return;
|
|
|
|
extend53(p, i0, i1);
|
|
|
|
for (i = i0/2; i < i1/2 + 1; i++)
|
|
p[2*i] -= (p[2*i-1] + p[2*i+1] + 2) >> 2;
|
|
for (i = i0/2; i < i1/2; i++)
|
|
p[2*i+1] += (p[2*i] + p[2*i+2]) >> 1;
|
|
}
|
|
|
|
static void dwt_decode53(DWTContext *s, int *t)
|
|
{
|
|
int lev,
|
|
w = s->linelen[s->ndeclevels-1][0];
|
|
int *line = s->linebuf;
|
|
line += 3;
|
|
|
|
for (lev = 0; lev < s->ndeclevels; lev++){
|
|
int lh = s->linelen[lev][0],
|
|
lv = s->linelen[lev][1],
|
|
mh = s->mod[lev][0],
|
|
mv = s->mod[lev][1],
|
|
lp;
|
|
int *l;
|
|
|
|
// HOR_SD
|
|
l = line + mh;
|
|
for (lp = 0; lp < lv; lp++){
|
|
int i, j = 0;
|
|
// copy with interleaving
|
|
for (i = mh; i < lh; i+=2, j++)
|
|
l[i] = t[w*lp + j];
|
|
for (i = 1-mh; i < lh; i+=2, j++)
|
|
l[i] = t[w*lp + j];
|
|
|
|
sr_1d53(line, mh, mh + lh);
|
|
|
|
for (i = 0; i < lh; i++)
|
|
t[w*lp + i] = l[i];
|
|
}
|
|
|
|
// VER_SD
|
|
l = line + mv;
|
|
for (lp = 0; lp < lh; lp++){
|
|
int i, j = 0;
|
|
// copy with interleaving
|
|
for (i = mv; i < lv; i+=2, j++)
|
|
l[i] = t[w*j + lp];
|
|
for (i = 1-mv; i < lv; i+=2, j++)
|
|
l[i] = t[w*j + lp];
|
|
|
|
sr_1d53(line, mv, mv + lv);
|
|
|
|
for (i = 0; i < lv; i++)
|
|
t[w*i + lp] = l[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sr_1d97(float *p, int i0, int i1)
|
|
{
|
|
int i;
|
|
|
|
if (i1 == i0 + 1)
|
|
return;
|
|
|
|
extend97(p, i0, i1);
|
|
|
|
for (i = i0/2 - 1; i < i1/2 + 2; i++)
|
|
p[2*i] -= 0.443506 * (p[2*i-1] + p[2*i+1]);
|
|
for (i = i0/2 - 1; i < i1/2 + 1; i++)
|
|
p[2*i+1] -= 0.882911 * (p[2*i] + p[2*i+2]);
|
|
for (i = i0/2; i < i1/2 + 1; i++)
|
|
p[2*i] += 0.052980 * (p[2*i-1] + p[2*i+1]);
|
|
for (i = i0/2; i < i1/2; i++)
|
|
p[2*i+1] += 1.586134 * (p[2*i] + p[2*i+2]);
|
|
}
|
|
|
|
static void dwt_decode97(DWTContext *s, int *t)
|
|
{
|
|
int lev,
|
|
w = s->linelen[s->ndeclevels-1][0];
|
|
float *line = s->linebuf;
|
|
line += 5;
|
|
|
|
for (lev = 0; lev < s->ndeclevels; lev++){
|
|
int lh = s->linelen[lev][0],
|
|
lv = s->linelen[lev][1],
|
|
mh = s->mod[lev][0],
|
|
mv = s->mod[lev][1],
|
|
lp;
|
|
float *l;
|
|
|
|
// HOR_SD
|
|
l = line + mh;
|
|
for (lp = 0; lp < lv; lp++){
|
|
int i, j = 0;
|
|
// copy with interleaving
|
|
for (i = mh; i < lh; i+=2, j++)
|
|
l[i] = scale97[1-mh] * t[w*lp + j];
|
|
for (i = 1-mh; i < lh; i+=2, j++)
|
|
l[i] = scale97[1-mh] * t[w*lp + j];
|
|
|
|
sr_1d97(line, mh, mh + lh);
|
|
|
|
for (i = 0; i < lh; i++)
|
|
t[w*lp + i] = l[i];
|
|
}
|
|
|
|
// VER_SD
|
|
l = line + mv;
|
|
for (lp = 0; lp < lh; lp++){
|
|
int i, j = 0;
|
|
// copy with interleaving
|
|
for (i = mv; i < lv; i+=2, j++)
|
|
l[i] = scale97[1-mv] * t[w*j + lp];
|
|
for (i = 1-mv; i < lv; i+=2, j++)
|
|
l[i] = scale97[1-mv] * t[w*j + lp];
|
|
|
|
sr_1d97(line, mv, mv + lv);
|
|
|
|
for (i = 0; i < lv; i++)
|
|
t[w*i + lp] = l[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
int ff_j2k_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type)
|
|
{
|
|
int i, j, lev = decomp_levels, maxlen,
|
|
b[2][2];
|
|
|
|
if ((unsigned)decomp_levels >= FF_DWT_MAX_DECLVLS)
|
|
return AVERROR_INVALIDDATA;
|
|
s->ndeclevels = decomp_levels;
|
|
s->type = type;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
for(j = 0; j < 2; j++)
|
|
b[i][j] = border[i][j];
|
|
|
|
maxlen = FFMAX(b[0][1] - b[0][0],
|
|
b[1][1] - b[1][0]);
|
|
|
|
while(--lev >= 0){
|
|
for (i = 0; i < 2; i++){
|
|
s->linelen[lev][i] = b[i][1] - b[i][0];
|
|
s->mod[lev][i] = b[i][0] & 1;
|
|
for (j = 0; j < 2; j++)
|
|
b[i][j] = (b[i][j] + 1) >> 1;
|
|
}
|
|
}
|
|
if (type == FF_DWT97)
|
|
s->linebuf = av_malloc((maxlen + 12) * sizeof(float));
|
|
else if (type == FF_DWT53)
|
|
s->linebuf = av_malloc((maxlen + 6) * sizeof(int));
|
|
else
|
|
return -1;
|
|
|
|
if (!s->linebuf)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ff_j2k_dwt_encode(DWTContext *s, int *t)
|
|
{
|
|
switch(s->type){
|
|
case FF_DWT97:
|
|
dwt_encode97(s, t); break;
|
|
case FF_DWT53:
|
|
dwt_encode53(s, t); break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_j2k_dwt_decode(DWTContext *s, int *t)
|
|
{
|
|
switch(s->type){
|
|
case FF_DWT97:
|
|
dwt_decode97(s, t); break;
|
|
case FF_DWT53:
|
|
dwt_decode53(s, t); break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ff_j2k_dwt_destroy(DWTContext *s)
|
|
{
|
|
av_freep(&s->linebuf);
|
|
}
|