488 lines
20 KiB
C
488 lines
20 KiB
C
/*
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* JPEG 2000 encoder and decoder common functions
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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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* JPEG 2000 image encoder and decoder common functions
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* @file
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* @author Kamil Nowosad
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/common.h"
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "j2k.h"
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#define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
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/* tag tree routines */
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/* allocate the memory for tag tree */
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static int tag_tree_size(int w, int h)
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{
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int res = 0;
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while (w > 1 || h > 1) {
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res += w * h;
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w = (w + 1) >> 1;
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h = (h + 1) >> 1;
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}
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return res + 1;
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}
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Jpeg2000TgtNode *ff_j2k_tag_tree_init(int w, int h)
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{
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int pw = w, ph = h;
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Jpeg2000TgtNode *res, *t, *t2;
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int32_t tt_size;
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tt_size = tag_tree_size(w, h);
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t = res = av_mallocz_array(tt_size, sizeof(*t));
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if (!res)
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return NULL;
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while (w > 1 || h > 1) {
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int i, j;
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pw = w;
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ph = h;
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w = (w + 1) >> 1;
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h = (h + 1) >> 1;
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t2 = t + pw * ph;
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for (i = 0; i < ph; i++)
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for (j = 0; j < pw; j++)
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t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];
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t = t2;
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}
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t[0].parent = NULL;
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return res;
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}
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static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)
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{
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int i, siz = tag_tree_size(w, h);
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for (i = 0; i < siz; i++) {
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t[i].val = 0;
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t[i].vis = 0;
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}
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}
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static int getsigctxno(int flag, int bandno)
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{
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int h, v, d;
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h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) +
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((flag & JPEG2000_T1_SIG_W) ? 1 : 0);
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v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) +
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((flag & JPEG2000_T1_SIG_S) ? 1 : 0);
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d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
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((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
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((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
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((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);
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if (bandno < 3) {
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if (bandno == 1)
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FFSWAP(int, h, v);
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if (h == 2) return 8;
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if (h == 1) {
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if (v >= 1) return 7;
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if (d >= 1) return 6;
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return 5;
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}
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if (v == 2) return 4;
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if (v == 1) return 3;
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if (d >= 2) return 2;
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if (d == 1) return 1;
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} else {
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if (d >= 3) return 8;
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if (d == 2) {
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if (h+v >= 1) return 7;
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return 6;
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}
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if (d == 1) {
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if (h+v >= 2) return 5;
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if (h+v == 1) return 4;
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return 3;
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}
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if (h+v >= 2) return 2;
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if (h+v == 1) return 1;
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}
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return 0;
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}
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static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } };
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static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } };
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static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } };
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static int getsgnctxno(int flag, uint8_t *xorbit)
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{
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int vcontrib, hcontrib;
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hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]
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[flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;
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vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]
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[flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;
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*xorbit = xorbittab[hcontrib][vcontrib];
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return ctxlbltab[hcontrib][vcontrib];
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}
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void ff_j2k_set_significant(Jpeg2000T1Context *t1, int x, int y,
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int negative)
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{
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x++;
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y++;
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t1->flags[y][x] |= JPEG2000_T1_SIG;
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if (negative) {
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t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
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t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
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t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
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t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
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} else {
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t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W;
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t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E;
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t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N;
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t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S;
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}
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t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW;
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t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE;
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t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW;
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t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE;
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}
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int ff_j2k_init_component(Jpeg2000Component *comp,
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Jpeg2000CodingStyle *codsty,
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Jpeg2000QuantStyle *qntsty,
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int cbps, int dx, int dy)
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{
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uint8_t log2_band_prec_width, log2_band_prec_height;
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int reslevelno, bandno, gbandno = 0, ret, i, j, csize = 1;
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if (ret=ff_j2k_dwt_init(&comp->dwt, comp->coord, codsty->nreslevels-1, codsty->transform))
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return ret;
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for (i = 0; i < 2; i++)
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csize *= comp->coord[i][1] - comp->coord[i][0];
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comp->data = av_malloc_array(csize, sizeof(*comp->data));
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if (!comp->data)
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return AVERROR(ENOMEM);
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comp->reslevel = av_malloc_array(codsty->nreslevels, sizeof(*comp->reslevel));
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if (!comp->reslevel)
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return AVERROR(ENOMEM);
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/* LOOP on resolution levels */
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for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
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int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
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Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
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/* Compute borders for each resolution level.
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* Computation of trx_0, trx_1, try_0 and try_1.
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* see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
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for (i = 0; i < 2; i++)
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for (j = 0; j < 2; j++)
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reslevel->coord[i][j] =
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ff_jpeg2000_ceildivpow2(comp->coord[i][j], declvl - 1);
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// update precincts size: 2^n value
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reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
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reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
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/* Number of bands for each resolution level */
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if (reslevelno == 0)
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reslevel->nbands = 1;
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else
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reslevel->nbands = 3;
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/* Number of precincts wich span the tile for resolution level reslevelno
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* see B.6 in ISO/IEC 15444-1:2002 eq. B-16
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* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
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* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
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* for Dcinema profiles in JPEG 2000
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* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
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* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
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if (reslevel->coord[0][1] == reslevel->coord[0][0])
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reslevel->num_precincts_x = 0;
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else
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reslevel->num_precincts_x =
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ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
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reslevel->log2_prec_width) -
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(reslevel->coord[0][0] >> reslevel->log2_prec_width);
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if (reslevel->coord[1][1] == reslevel->coord[1][0])
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reslevel->num_precincts_y = 0;
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else
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reslevel->num_precincts_y =
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ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
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reslevel->log2_prec_height) -
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(reslevel->coord[1][0] >> reslevel->log2_prec_height);
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reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band));
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if (!reslevel->band)
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return AVERROR(ENOMEM);
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for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
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Jpeg2000Band *band = reslevel->band + bandno;
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int precx, precy;
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int x0, y0, x1, y1;
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int xi0, yi0, xi1, yi1;
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int cblkperprecw, cblkperprech;
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int cblkno, precno;
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int nb_precincts;
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if (qntsty->quantsty != JPEG2000_QSTY_NONE) {
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static const uint8_t lut_gain[2][4] = {{0, 0, 0, 0}, {0, 1, 1, 2}};
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int numbps;
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numbps = cbps + lut_gain[codsty->transform][bandno + reslevelno>0];
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band->stepsize = SHL(2048 + qntsty->mant[gbandno], 2 + numbps - qntsty->expn[gbandno]);
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} else
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band->stepsize = 1 << 13;
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if (reslevelno == 0) {
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/* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
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for (i = 0; i < 2; i++)
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for (j = 0; j < 2; j++)
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band->coord[i][j] =
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ff_jpeg2000_ceildivpow2(comp->coord[i][j],
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declvl - 1);
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log2_band_prec_width = reslevel->log2_prec_width;
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log2_band_prec_height = reslevel->log2_prec_height;
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/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
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band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
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reslevel->log2_prec_width);
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band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
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reslevel->log2_prec_height);
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} else {
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/* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
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/* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
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for (i = 0; i < 2; i++)
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for (j = 0; j < 2; j++)
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/* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
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band->coord[i][j] =
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ff_jpeg2000_ceildivpow2(comp->coord[i][j] -
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(((bandno + 1 >> i) & 1) << declvl - 1),
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declvl);
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/* TODO: Manage case of 3 band offsets here or
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* in coding/decoding function? */
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/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
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band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
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reslevel->log2_prec_width - 1);
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band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
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reslevel->log2_prec_height - 1);
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log2_band_prec_width = reslevel->log2_prec_width - 1;
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log2_band_prec_height = reslevel->log2_prec_height - 1;
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}
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band->cblknx = ff_jpeg2000_ceildivpow2(band->coord[0][1], band->log2_cblk_width) - (band->coord[0][0] >> band->log2_cblk_width);
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band->cblkny = ff_jpeg2000_ceildivpow2(band->coord[1][1], band->log2_cblk_height) - (band->coord[1][0] >> band->log2_cblk_height);
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for (j = 0; j < 2; j++)
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band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx);
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for (j = 0; j < 2; j++)
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band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);
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band->cblknx = ff_jpeg2000_ceildiv(band->cblknx, dx);
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band->cblkny = ff_jpeg2000_ceildiv(band->cblkny, dy);
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band->cblk = av_malloc_array(band->cblknx *
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band->cblkny,
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sizeof(*band->cblk));
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if (!band->cblk)
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return AVERROR(ENOMEM);
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band->prec = av_malloc_array(reslevel->num_precincts_x *
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reslevel->num_precincts_y,
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sizeof(*band->prec));
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if (!band->prec)
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return AVERROR(ENOMEM);
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nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
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y0 = band->coord[1][0];
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y1 = ((band->coord[1][0] + (1<<reslevel->log2_prec_height)) & ~((1<<reslevel->log2_prec_height)-1)) - y0;
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yi0 = 0;
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yi1 = ff_jpeg2000_ceildivpow2(y1 - y0, codsty->log2_cblk_height) << codsty->log2_cblk_height;
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yi1 = FFMIN(yi1, band->cblkny);
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cblkperprech = 1<<(reslevel->log2_prec_height - codsty->log2_cblk_height);
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for (precy = 0, precno = 0; precy < reslevel->num_precincts_y; precy++) {
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for (precx = 0; precx < reslevel->num_precincts_x; precx++, precno++) {
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band->prec[precno].yi0 = yi0;
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band->prec[precno].yi1 = yi1;
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}
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yi1 += cblkperprech;
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yi0 = yi1 - cblkperprech;
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yi1 = FFMIN(yi1, band->cblkny);
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}
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x0 = band->coord[0][0];
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x1 = ((band->coord[0][0] + (1<<reslevel->log2_prec_width)) & ~((1<<reslevel->log2_prec_width)-1)) - x0;
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xi0 = 0;
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xi1 = ff_jpeg2000_ceildivpow2(x1 - x0, codsty->log2_cblk_width) << codsty->log2_cblk_width;
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xi1 = FFMIN(xi1, band->cblknx);
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cblkperprecw = 1<<(reslevel->log2_prec_width - codsty->log2_cblk_width);
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for (precx = 0, precno = 0; precx < reslevel->num_precincts_x; precx++) {
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for (precy = 0; precy < reslevel->num_precincts_y; precy++, precno = 0) {
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Jpeg2000Prec *prec = band->prec + precno;
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prec->xi0 = xi0;
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prec->xi1 = xi1;
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}
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xi1 += cblkperprecw;
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xi0 = xi1 - cblkperprecw;
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xi1 = FFMIN(xi1, band->cblknx);
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}
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for (precno = 0; precno < nb_precincts; precno++) {
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Jpeg2000Prec *prec = band->prec + precno;
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/* TODO: Explain formula for JPEG200 DCINEMA. */
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/* TODO: Verify with previous count of codeblocks per band */
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/* Compute P_x0 */
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prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
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(1 << log2_band_prec_width);
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prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
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/* Compute P_y0 */
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prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
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(1 << log2_band_prec_height);
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prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
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/* Compute P_x1 */
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prec->coord[0][1] = prec->coord[0][0] +
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(1 << log2_band_prec_width);
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prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
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/* Compute P_y1 */
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prec->coord[1][1] = prec->coord[1][0] +
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(1 << log2_band_prec_height);
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prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
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prec->nb_codeblocks_width =
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ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
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prec->coord[0][0],
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band->log2_cblk_width);
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prec->nb_codeblocks_height =
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ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
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prec->coord[1][0],
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band->log2_cblk_height);
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/* Tag trees initialization */
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prec->cblkincl =
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ff_j2k_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->cblkincl)
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return AVERROR(ENOMEM);
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prec->zerobits =
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ff_j2k_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->zerobits)
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return AVERROR(ENOMEM);
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// prec->cblk = av_malloc_array(prec->nb_codeblocks_width *
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// prec->nb_codeblocks_height,
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// sizeof(*prec->cblk));
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|
prec->cblk = band->cblk;
|
|
av_assert0(nb_precincts == 1);
|
|
if (!prec->cblk)
|
|
return AVERROR(ENOMEM);
|
|
for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
|
|
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
|
|
uint16_t Cx0, Cy0;
|
|
|
|
/* Compute coordinates of codeblocks */
|
|
/* Compute Cx0*/
|
|
Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width;
|
|
Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
|
|
cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
|
|
|
|
/* Compute Cy0*/
|
|
Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height;
|
|
Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
|
|
cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
|
|
|
|
/* Compute Cx1 */
|
|
cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
|
|
prec->coord[0][1]);
|
|
|
|
/* Compute Cy1 */
|
|
cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
|
|
prec->coord[1][1]);
|
|
cblk->zero = 0;
|
|
cblk->lblock = 3;
|
|
cblk->length = 0;
|
|
cblk->lengthinc = 0;
|
|
cblk->npasses = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ff_j2k_reinit(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
|
|
{
|
|
int reslevelno, bandno, cblkno, precno;
|
|
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
|
|
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
|
|
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
|
|
Jpeg2000Band *band = rlevel->band + bandno;
|
|
for(precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
tag_tree_zero(prec->zerobits, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);
|
|
tag_tree_zero(prec->cblkincl, prec->xi1 - prec->xi0, prec->yi1 - prec->yi0);
|
|
}
|
|
for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++) {
|
|
Jpeg2000Cblk *cblk = band->cblk + cblkno;
|
|
cblk->length = 0;
|
|
cblk->lblock = 3;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void ff_j2k_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
|
|
{
|
|
int reslevelno, bandno, precno;
|
|
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
|
|
Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
|
|
|
|
for (bandno = 0; bandno < reslevel->nbands; bandno++) {
|
|
Jpeg2000Band *band = reslevel->band + bandno;
|
|
for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
av_freep(&prec->zerobits);
|
|
av_freep(&prec->cblkincl);
|
|
}
|
|
av_freep(&band->cblk);
|
|
av_freep(&band->prec);
|
|
}
|
|
av_freep(&reslevel->band);
|
|
}
|
|
|
|
ff_j2k_dwt_destroy(&comp->dwt);
|
|
av_freep(&comp->reslevel);
|
|
av_freep(&comp->data);
|
|
}
|