579 lines
15 KiB
C
579 lines
15 KiB
C
/*
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* Discrete wavelet transform
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* Copyright (c) 2007 Kamil Nowosad
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* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Discrete wavelet transform
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*/
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#include "libavutil/common.h"
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#include "libavutil/mem.h"
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#include "jpeg2000dwt.h"
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#include "internal.h"
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/* Defines for 9/7 DWT lifting parameters.
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* Parameters are in float. */
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#define F_LFTG_ALPHA 1.586134342059924f
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#define F_LFTG_BETA 0.052980118572961f
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#define F_LFTG_GAMMA 0.882911075530934f
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#define F_LFTG_DELTA 0.443506852043971f
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#define F_LFTG_K 1.230174104914001f
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#define F_LFTG_X 1.625732422f
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/* FIXME: Why use 1.625732422 instead of 1/F_LFTG_K?
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* Incorrect value in JPEG2000 norm.
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* see (ISO/IEC 15444:1 (version 2002) F.3.8.2 */
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/* Lifting parameters in integer format.
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* Computed as param = (float param) * (1 << 16) */
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#define I_LFTG_ALPHA 103949
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#define I_LFTG_BETA 3472
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#define I_LFTG_GAMMA 57862
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#define I_LFTG_DELTA 29066
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#define I_LFTG_K 80621
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#define I_LFTG_X 106544
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static inline void extend53(int *p, int i0, int i1)
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{
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p[i0 - 1] = p[i0 + 1];
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p[i1] = p[i1 - 2];
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p[i0 - 2] = p[i0 + 2];
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p[i1 + 1] = p[i1 - 3];
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}
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static inline void extend97_float(float *p, int i0, int i1)
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{
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int i;
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for (i = 1; i <= 4; i++) {
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p[i0 - i] = p[i0 + i];
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p[i1 + i - 1] = p[i1 - i - 1];
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}
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}
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static inline void extend97_int(int32_t *p, int i0, int i1)
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{
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int i;
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for (i = 1; i <= 4; i++) {
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p[i0 - i] = p[i0 + i];
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p[i1 + i - 1] = p[i1 - i - 1];
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}
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}
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static void sd_1d53(int *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend53(p, i0, i1);
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for (i = (i0+1)/2 - 1; i < (i1+1)/2; i++)
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p[2*i+1] -= (p[2*i] + p[2*i+2]) >> 1;
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for (i = (i0+1)/2; i < (i1+1)/2; i++)
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p[2*i] += (p[2*i-1] + p[2*i+1] + 2) >> 2;
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}
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static void dwt_encode53(DWTContext *s, int *t)
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{
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int lev,
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w = s->linelen[s->ndeclevels-1][0];
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int *line = s->i_linebuf;
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line += 3;
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for (lev = s->ndeclevels-1; lev >= 0; lev--){
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int lh = s->linelen[lev][0],
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lv = s->linelen[lev][1],
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mh = s->mod[lev][0],
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mv = s->mod[lev][1],
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lp;
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int *l;
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// HOR_SD
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l = line + mh;
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for (lp = 0; lp < lv; lp++){
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int i, j = 0;
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for (i = 0; i < lh; i++)
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l[i] = t[w*lp + i];
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sd_1d53(line, mh, mh + lh);
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// copy back and deinterleave
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for (i = mh; i < lh; i+=2, j++)
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t[w*lp + j] = l[i];
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for (i = 1-mh; i < lh; i+=2, j++)
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t[w*lp + j] = l[i];
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}
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// VER_SD
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l = line + mv;
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for (lp = 0; lp < lh; lp++) {
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int i, j = 0;
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for (i = 0; i < lv; i++)
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l[i] = t[w*i + lp];
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sd_1d53(line, mv, mv + lv);
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// copy back and deinterleave
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for (i = mv; i < lv; i+=2, j++)
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t[w*j + lp] = l[i];
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for (i = 1-mv; i < lv; i+=2, j++)
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t[w*j + lp] = l[i];
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}
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}
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}
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static void sd_1d97_float(float *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend97_float(p, i0, i1);
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i0++; i1++;
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for (i = i0/2 - 2; i < i1/2 + 1; i++)
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p[2*i+1] -= 1.586134 * (p[2*i] + p[2*i+2]);
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for (i = i0/2 - 1; i < i1/2 + 1; i++)
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p[2*i] -= 0.052980 * (p[2*i-1] + p[2*i+1]);
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for (i = i0/2 - 1; i < i1/2; i++)
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p[2*i+1] += 0.882911 * (p[2*i] + p[2*i+2]);
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for (i = i0/2; i < i1/2; i++)
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p[2*i] += 0.443506 * (p[2*i-1] + p[2*i+1]);
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}
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static void dwt_encode97_float(DWTContext *s, float *t)
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{
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int lev,
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w = s->linelen[s->ndeclevels-1][0];
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float *line = s->f_linebuf;
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line += 5;
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for (lev = s->ndeclevels-1; lev >= 0; lev--){
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int lh = s->linelen[lev][0],
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lv = s->linelen[lev][1],
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mh = s->mod[lev][0],
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mv = s->mod[lev][1],
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lp;
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float *l;
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// HOR_SD
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l = line + mh;
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for (lp = 0; lp < lv; lp++){
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int i, j = 0;
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for (i = 0; i < lh; i++)
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l[i] = t[w*lp + i];
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sd_1d97_float(line, mh, mh + lh);
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// copy back and deinterleave
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for (i = mh; i < lh; i+=2, j++)
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t[w*lp + j] = F_LFTG_X * l[i] / 2;
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for (i = 1-mh; i < lh; i+=2, j++)
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t[w*lp + j] = F_LFTG_K * l[i] / 2;
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}
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// VER_SD
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l = line + mv;
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for (lp = 0; lp < lh; lp++) {
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int i, j = 0;
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for (i = 0; i < lv; i++)
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l[i] = t[w*i + lp];
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sd_1d97_float(line, mv, mv + lv);
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// copy back and deinterleave
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for (i = mv; i < lv; i+=2, j++)
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t[w*j + lp] = F_LFTG_X * l[i] / 2;
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for (i = 1-mv; i < lv; i+=2, j++)
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t[w*j + lp] = F_LFTG_K * l[i] / 2;
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}
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}
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}
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static void sd_1d97_int(int *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend97_int(p, i0, i1);
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i0++; i1++;
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for (i = i0/2 - 2; i < i1/2 + 1; i++)
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p[2 * i + 1] -= (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
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for (i = i0/2 - 1; i < i1/2 + 1; i++)
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p[2 * i] -= (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
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for (i = i0/2 - 1; i < i1/2; i++)
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p[2 * i + 1] += (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
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for (i = i0/2; i < i1/2; i++)
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p[2 * i] += (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
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}
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static void dwt_encode97_int(DWTContext *s, int *t)
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{
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int lev,
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w = s->linelen[s->ndeclevels-1][0];
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int *line = s->i_linebuf;
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line += 5;
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for (lev = s->ndeclevels-1; lev >= 0; lev--){
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int lh = s->linelen[lev][0],
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lv = s->linelen[lev][1],
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mh = s->mod[lev][0],
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mv = s->mod[lev][1],
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lp;
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int *l;
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// HOR_SD
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l = line + mh;
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for (lp = 0; lp < lv; lp++){
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int i, j = 0;
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for (i = 0; i < lh; i++)
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l[i] = t[w*lp + i];
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sd_1d97_int(line, mh, mh + lh);
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// copy back and deinterleave
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for (i = mh; i < lh; i+=2, j++)
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t[w*lp + j] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17;
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for (i = 1-mh; i < lh; i+=2, j++)
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t[w*lp + j] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17;
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}
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// VER_SD
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l = line + mv;
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for (lp = 0; lp < lh; lp++) {
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int i, j = 0;
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for (i = 0; i < lv; i++)
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l[i] = t[w*i + lp];
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sd_1d97_int(line, mv, mv + lv);
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// copy back and deinterleave
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for (i = mv; i < lv; i+=2, j++)
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t[w*j + lp] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17;
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for (i = 1-mv; i < lv; i+=2, j++)
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t[w*j + lp] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17;
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}
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}
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}
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static void sr_1d53(int *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend53(p, i0, i1);
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for (i = i0 / 2; i < i1 / 2 + 1; i++)
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p[2 * i] -= (p[2 * i - 1] + p[2 * i + 1] + 2) >> 2;
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for (i = i0 / 2; i < i1 / 2; i++)
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p[2 * i + 1] += (p[2 * i] + p[2 * i + 2]) >> 1;
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}
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static void dwt_decode53(DWTContext *s, int *t)
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{
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int lev;
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int w = s->linelen[s->ndeclevels - 1][0];
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int32_t *line = s->i_linebuf;
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line += 3;
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for (lev = 0; lev < s->ndeclevels; lev++) {
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int lh = s->linelen[lev][0],
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lv = s->linelen[lev][1],
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mh = s->mod[lev][0],
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mv = s->mod[lev][1],
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lp;
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int *l;
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// HOR_SD
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l = line + mh;
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for (lp = 0; lp < lv; lp++) {
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int i, j = 0;
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// copy with interleaving
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for (i = mh; i < lh; i += 2, j++)
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l[i] = t[w * lp + j];
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for (i = 1 - mh; i < lh; i += 2, j++)
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l[i] = t[w * lp + j];
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sr_1d53(line, mh, mh + lh);
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for (i = 0; i < lh; i++)
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t[w * lp + i] = l[i];
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}
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// VER_SD
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l = line + mv;
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for (lp = 0; lp < lh; lp++) {
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int i, j = 0;
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// copy with interleaving
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for (i = mv; i < lv; i += 2, j++)
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l[i] = t[w * j + lp];
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for (i = 1 - mv; i < lv; i += 2, j++)
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l[i] = t[w * j + lp];
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sr_1d53(line, mv, mv + lv);
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for (i = 0; i < lv; i++)
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t[w * i + lp] = l[i];
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}
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}
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}
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static void sr_1d97_float(float *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend97_float(p, i0, i1);
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for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++)
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p[2 * i] -= F_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]);
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/* step 4 */
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for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++)
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p[2 * i + 1] -= F_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]);
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/*step 5*/
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for (i = i0 / 2; i < i1 / 2 + 1; i++)
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p[2 * i] += F_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]);
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/* step 6 */
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for (i = i0 / 2; i < i1 / 2; i++)
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p[2 * i + 1] += F_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]);
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}
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static void dwt_decode97_float(DWTContext *s, float *t)
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{
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int lev;
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int w = s->linelen[s->ndeclevels - 1][0];
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float *line = s->f_linebuf;
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float *data = t;
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/* position at index O of line range [0-5,w+5] cf. extend function */
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line += 5;
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for (lev = 0; lev < s->ndeclevels; lev++) {
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int lh = s->linelen[lev][0],
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lv = s->linelen[lev][1],
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mh = s->mod[lev][0],
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mv = s->mod[lev][1],
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lp;
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float *l;
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// HOR_SD
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l = line + mh;
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for (lp = 0; lp < lv; lp++) {
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int i, j = 0;
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// copy with interleaving
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for (i = mh; i < lh; i += 2, j++)
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l[i] = data[w * lp + j] * F_LFTG_K;
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for (i = 1 - mh; i < lh; i += 2, j++)
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l[i] = data[w * lp + j] * F_LFTG_X;
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sr_1d97_float(line, mh, mh + lh);
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for (i = 0; i < lh; i++)
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data[w * lp + i] = l[i];
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}
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// VER_SD
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l = line + mv;
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for (lp = 0; lp < lh; lp++) {
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int i, j = 0;
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// copy with interleaving
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for (i = mv; i < lv; i += 2, j++)
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l[i] = data[w * j + lp] * F_LFTG_K;
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for (i = 1 - mv; i < lv; i += 2, j++)
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l[i] = data[w * j + lp] * F_LFTG_X;
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sr_1d97_float(line, mv, mv + lv);
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for (i = 0; i < lv; i++)
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data[w * i + lp] = l[i];
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}
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}
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}
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static void sr_1d97_int(int32_t *p, int i0, int i1)
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{
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int i;
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if (i1 == i0 + 1)
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return;
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extend97_int(p, i0, i1);
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for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++)
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p[2 * i] -= (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
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/* step 4 */
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for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++)
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p[2 * i + 1] -= (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
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/*step 5*/
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for (i = i0 / 2; i < i1 / 2 + 1; i++)
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p[2 * i] += (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
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/* step 6 */
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for (i = i0 / 2; i < i1 / 2; i++)
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p[2 * i + 1] += (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
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}
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static void dwt_decode97_int(DWTContext *s, int32_t *t)
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{
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int lev;
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int w = s->linelen[s->ndeclevels - 1][0];
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int32_t *line = s->i_linebuf;
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int32_t *data = t;
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/* position at index O of line range [0-5,w+5] cf. extend function */
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line += 5;
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|
|
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;
|
|
int32_t *l;
|
|
// HOR_SD
|
|
l = line + mh;
|
|
for (lp = 0; lp < lv; lp++) {
|
|
int i, j = 0;
|
|
// rescale with interleaving
|
|
for (i = mh; i < lh; i += 2, j++)
|
|
l[i] = ((data[w * lp + j] * I_LFTG_K) + (1 << 15)) >> 16;
|
|
for (i = 1 - mh; i < lh; i += 2, j++)
|
|
l[i] = ((data[w * lp + j] * I_LFTG_X) + (1 << 15)) >> 16;
|
|
|
|
sr_1d97_int(line, mh, mh + lh);
|
|
|
|
for (i = 0; i < lh; i++)
|
|
data[w * lp + i] = l[i];
|
|
}
|
|
|
|
// VER_SD
|
|
l = line + mv;
|
|
for (lp = 0; lp < lh; lp++) {
|
|
int i, j = 0;
|
|
// rescale with interleaving
|
|
for (i = mv; i < lv; i += 2, j++)
|
|
l[i] = ((data[w * j + lp] * I_LFTG_K) + (1 << 15)) >> 16;
|
|
for (i = 1 - mv; i < lv; i += 2, j++)
|
|
l[i] = ((data[w * j + lp] * I_LFTG_X) + (1 << 15)) >> 16;
|
|
|
|
sr_1d97_int(line, mv, mv + lv);
|
|
|
|
for (i = 0; i < lv; i++)
|
|
data[w * i + lp] = l[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2],
|
|
int decomp_levels, int type)
|
|
{
|
|
int i, j, lev = decomp_levels, maxlen,
|
|
b[2][2];
|
|
|
|
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;
|
|
}
|
|
switch (type) {
|
|
case FF_DWT97:
|
|
s->f_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->f_linebuf));
|
|
if (!s->f_linebuf)
|
|
return AVERROR(ENOMEM);
|
|
break;
|
|
case FF_DWT97_INT:
|
|
s->i_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->i_linebuf));
|
|
if (!s->i_linebuf)
|
|
return AVERROR(ENOMEM);
|
|
break;
|
|
case FF_DWT53:
|
|
s->i_linebuf = av_malloc_array((maxlen + 6), sizeof(*s->i_linebuf));
|
|
if (!s->i_linebuf)
|
|
return AVERROR(ENOMEM);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_dwt_encode(DWTContext *s, void *t)
|
|
{
|
|
switch(s->type){
|
|
case FF_DWT97:
|
|
dwt_encode97_float(s, t); break;
|
|
case FF_DWT97_INT:
|
|
dwt_encode97_int(s, t); break;
|
|
case FF_DWT53:
|
|
dwt_encode53(s, t); break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_dwt_decode(DWTContext *s, void *t)
|
|
{
|
|
switch (s->type) {
|
|
case FF_DWT97:
|
|
dwt_decode97_float(s, t);
|
|
break;
|
|
case FF_DWT97_INT:
|
|
dwt_decode97_int(s, t);
|
|
break;
|
|
case FF_DWT53:
|
|
dwt_decode53(s, t);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ff_dwt_destroy(DWTContext *s)
|
|
{
|
|
av_freep(&s->f_linebuf);
|
|
av_freep(&s->i_linebuf);
|
|
}
|