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a05db52c12
FFmpeg/libavcodec/j2k.c
Michael Niedermayer a05db52c12 j2k: remove cblk from band 
cblk is now in the same place as in jpeg2000, which will simplify
merging the 2 decoders

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-05-27 15:13:51 +02:00

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/*
* JPEG 2000 encoder and decoder common functions
* Copyright (c) 2007 Kamil Nowosad
* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
*
* 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
*/
/**
* JPEG 2000 image encoder and decoder common functions
* @file
* @author Kamil Nowosad
*/
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#include "j2k.h"
#define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
/* tag tree routines */
/* allocate the memory for tag tree */
static int tag_tree_size(int w, int h)
{
int res = 0;
while (w > 1 || h > 1) {
res += w * h;
w = (w + 1) >> 1;
h = (h + 1) >> 1;
}
return res + 1;
}
Jpeg2000TgtNode *ff_j2k_tag_tree_init(int w, int h)
{
int pw = w, ph = h;
Jpeg2000TgtNode *res, *t, *t2;
int32_t tt_size;
tt_size = tag_tree_size(w, h);
t = res = av_mallocz_array(tt_size, sizeof(*t));
if (!res)
return NULL;
while (w > 1 || h > 1) {
int i, j;
pw = w;
ph = h;
w = (w + 1) >> 1;
h = (h + 1) >> 1;
t2 = t + pw * ph;
for (i = 0; i < ph; i++)
for (j = 0; j < pw; j++)
t[i * pw + j].parent = &t2[(i >> 1) * w + (j >> 1)];
t = t2;
}
t[0].parent = NULL;
return res;
}
static void tag_tree_zero(Jpeg2000TgtNode *t, int w, int h)
{
int i, siz = tag_tree_size(w, h);
for (i = 0; i < siz; i++) {
t[i].val = 0;
t[i].vis = 0;
}
}
static int getsigctxno(int flag, int bandno)
{
int h, v, d;
h = ((flag & JPEG2000_T1_SIG_E) ? 1 : 0) +
((flag & JPEG2000_T1_SIG_W) ? 1 : 0);
v = ((flag & JPEG2000_T1_SIG_N) ? 1 : 0) +
((flag & JPEG2000_T1_SIG_S) ? 1 : 0);
d = ((flag & JPEG2000_T1_SIG_NE) ? 1 : 0) +
((flag & JPEG2000_T1_SIG_NW) ? 1 : 0) +
((flag & JPEG2000_T1_SIG_SE) ? 1 : 0) +
((flag & JPEG2000_T1_SIG_SW) ? 1 : 0);
if (bandno < 3) {
if (bandno == 1)
FFSWAP(int, h, v);
if (h == 2) return 8;
if (h == 1) {
if (v >= 1) return 7;
if (d >= 1) return 6;
return 5;
}
if (v == 2) return 4;
if (v == 1) return 3;
if (d >= 2) return 2;
if (d == 1) return 1;
} else {
if (d >= 3) return 8;
if (d == 2) {
if (h+v >= 1) return 7;
return 6;
}
if (d == 1) {
if (h+v >= 2) return 5;
if (h+v == 1) return 4;
return 3;
}
if (h+v >= 2) return 2;
if (h+v == 1) return 1;
}
return 0;
}
static const int contribtab[3][3] = { { 0, -1, 1 }, { -1, -1, 0 }, { 1, 0, 1 } };
static const int ctxlbltab[3][3] = { { 13, 12, 11 }, { 10, 9, 10 }, { 11, 12, 13 } };
static const int xorbittab[3][3] = { { 1, 1, 1 }, { 1, 0, 0 }, { 0, 0, 0 } };
static int getsgnctxno(int flag, uint8_t *xorbit)
{
int vcontrib, hcontrib;
hcontrib = contribtab[flag & JPEG2000_T1_SIG_E ? flag & JPEG2000_T1_SGN_E ? 1 : 2 : 0]
[flag & JPEG2000_T1_SIG_W ? flag & JPEG2000_T1_SGN_W ? 1 : 2 : 0] + 1;
vcontrib = contribtab[flag & JPEG2000_T1_SIG_S ? flag & JPEG2000_T1_SGN_S ? 1 : 2 : 0]
[flag & JPEG2000_T1_SIG_N ? flag & JPEG2000_T1_SGN_N ? 1 : 2 : 0] + 1;
*xorbit = xorbittab[hcontrib][vcontrib];
return ctxlbltab[hcontrib][vcontrib];
}
void ff_j2k_set_significant(Jpeg2000T1Context *t1, int x, int y,
int negative)
{
x++;
y++;
t1->flags[y][x] |= JPEG2000_T1_SIG;
if (negative) {
t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
} else {
t1->flags[y][x + 1] |= JPEG2000_T1_SIG_W;
t1->flags[y][x - 1] |= JPEG2000_T1_SIG_E;
t1->flags[y + 1][x] |= JPEG2000_T1_SIG_N;
t1->flags[y - 1][x] |= JPEG2000_T1_SIG_S;
}
t1->flags[y + 1][x + 1] |= JPEG2000_T1_SIG_NW;
t1->flags[y + 1][x - 1] |= JPEG2000_T1_SIG_NE;
t1->flags[y - 1][x + 1] |= JPEG2000_T1_SIG_SW;
t1->flags[y - 1][x - 1] |= JPEG2000_T1_SIG_SE;
}
int ff_j2k_init_component(Jpeg2000Component *comp,
Jpeg2000CodingStyle *codsty,
Jpeg2000QuantStyle *qntsty,
int cbps, int dx, int dy)
{
uint8_t log2_band_prec_width, log2_band_prec_height;
int reslevelno, bandno, gbandno = 0, ret, i, j, csize = 1;
if (ret=ff_j2k_dwt_init(&comp->dwt, comp->coord, codsty->nreslevels-1, codsty->transform))
return ret;
for (i = 0; i < 2; i++)
csize *= comp->coord[i][1] - comp->coord[i][0];
comp->data = av_malloc_array(csize, sizeof(*comp->data));
if (!comp->data)
return AVERROR(ENOMEM);
comp->reslevel = av_malloc_array(codsty->nreslevels, sizeof(*comp->reslevel));
if (!comp->reslevel)
return AVERROR(ENOMEM);
/* LOOP on resolution levels */
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
/* Compute borders for each resolution level.
* Computation of trx_0, trx_1, try_0 and try_1.
* see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
reslevel->coord[i][j] =
ff_jpeg2000_ceildivpow2(comp->coord[i][j], declvl - 1);
// update precincts size: 2^n value
reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
/* Number of bands for each resolution level */
if (reslevelno == 0)
reslevel->nbands = 1;
else
reslevel->nbands = 3;
/* Number of precincts wich span the tile for resolution level reslevelno
* see B.6 in ISO/IEC 15444-1:2002 eq. B-16
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
* for Dcinema profiles in JPEG 2000
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
if (reslevel->coord[0][1] == reslevel->coord[0][0])
reslevel->num_precincts_x = 0;
else
reslevel->num_precincts_x =
ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
reslevel->log2_prec_width) -
(reslevel->coord[0][0] >> reslevel->log2_prec_width);
if (reslevel->coord[1][1] == reslevel->coord[1][0])
reslevel->num_precincts_y = 0;
else
reslevel->num_precincts_y =
ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
reslevel->log2_prec_height) -
(reslevel->coord[1][0] >> reslevel->log2_prec_height);
reslevel->band = av_malloc_array(reslevel->nbands, sizeof(*reslevel->band));
if (!reslevel->band)
return AVERROR(ENOMEM);
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
Jpeg2000Band *band = reslevel->band + bandno;
int precx, precy;
int x0, y0, x1, y1;
int xi0, yi0, xi1, yi1;
int cblkperprecw, cblkperprech;
int cblkno, precno;
int nb_precincts;
if (qntsty->quantsty != JPEG2000_QSTY_NONE) {
static const uint8_t lut_gain[2][4] = {{0, 0, 0, 0}, {0, 1, 1, 2}};
int numbps;
numbps = cbps + lut_gain[codsty->transform][bandno + reslevelno>0];
band->stepsize = SHL(2048 + qntsty->mant[gbandno], 2 + numbps - qntsty->expn[gbandno]);
} else
band->stepsize = 1 << 13;
if (reslevelno == 0) {
/* for reslevelno = 0, only one band, x0_b = y0_b = 0 */
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
band->coord[i][j] =
ff_jpeg2000_ceildivpow2(comp->coord[i][j] - comp->coord[i][0],
declvl - 1);
log2_band_prec_width = reslevel->log2_prec_width;
log2_band_prec_height = reslevel->log2_prec_height;
/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
reslevel->log2_prec_width);
band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
reslevel->log2_prec_height);
} else {
/* 3 bands x0_b = 1 y0_b = 0; x0_b = 0 y0_b = 1; x0_b = y0_b = 1 */
/* x0_b and y0_b are computed with ((bandno + 1 >> i) & 1) */
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
/* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
band->coord[i][j] =
ff_jpeg2000_ceildivpow2(comp->coord[i][j] - comp->coord[i][0] -
(((bandno + 1 >> i) & 1) << declvl - 1),
declvl);
/* TODO: Manage case of 3 band offsets here or
* in coding/decoding function? */
/* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
band->log2_cblk_width = FFMIN(codsty->log2_cblk_width,
reslevel->log2_prec_width - 1);
band->log2_cblk_height = FFMIN(codsty->log2_cblk_height,
reslevel->log2_prec_height - 1);
log2_band_prec_width = reslevel->log2_prec_width - 1;
log2_band_prec_height = reslevel->log2_prec_height - 1;
}
band->cblknx = ff_jpeg2000_ceildivpow2(band->coord[0][1], band->log2_cblk_width) - (band->coord[0][0] >> band->log2_cblk_width);
band->cblkny = ff_jpeg2000_ceildivpow2(band->coord[1][1], band->log2_cblk_height) - (band->coord[1][0] >> band->log2_cblk_height);
for (j = 0; j < 2; j++)
band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx);
for (j = 0; j < 2; j++)
band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy);
band->cblknx = ff_jpeg2000_ceildiv(band->cblknx, dx);
band->cblkny = ff_jpeg2000_ceildiv(band->cblkny, dy);
band->prec = av_malloc_array(reslevel->num_precincts_x *
reslevel->num_precincts_y,
sizeof(*band->prec));
if (!band->prec)
return AVERROR(ENOMEM);
nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
y0 = band->coord[1][0];
y1 = ((band->coord[1][0] + (1<<reslevel->log2_prec_height)) & ~((1<<reslevel->log2_prec_height)-1)) - y0;
yi0 = 0;
yi1 = ff_jpeg2000_ceildivpow2(y1 - y0, codsty->log2_cblk_height) << codsty->log2_cblk_height;
yi1 = FFMIN(yi1, band->cblkny);
cblkperprech = 1<<(reslevel->log2_prec_height - codsty->log2_cblk_height);
for (precy = 0, precno = 0; precy < reslevel->num_precincts_y; precy++) {
for (precx = 0; precx < reslevel->num_precincts_x; precx++, precno++) {
band->prec[precno].yi0 = yi0;
band->prec[precno].yi1 = yi1;
}
yi1 += cblkperprech;
yi0 = yi1 - cblkperprech;
yi1 = FFMIN(yi1, band->cblkny);
}
x0 = band->coord[0][0];
x1 = ((band->coord[0][0] + (1<<reslevel->log2_prec_width)) & ~((1<<reslevel->log2_prec_width)-1)) - x0;
xi0 = 0;
xi1 = ff_jpeg2000_ceildivpow2(x1 - x0, codsty->log2_cblk_width) << codsty->log2_cblk_width;
xi1 = FFMIN(xi1, band->cblknx);
cblkperprecw = 1<<(reslevel->log2_prec_width - codsty->log2_cblk_width);
for (precx = 0, precno = 0; precx < reslevel->num_precincts_x; precx++) {
for (precy = 0; precy < reslevel->num_precincts_y; precy++, precno = 0) {
Jpeg2000Prec *prec = band->prec + precno;
prec->xi0 = xi0;
prec->xi1 = xi1;
}
xi1 += cblkperprecw;
xi0 = xi1 - cblkperprecw;
xi1 = FFMIN(xi1, band->cblknx);
}
for (precno = 0; precno < nb_precincts; precno++) {
Jpeg2000Prec *prec = band->prec + precno;
/* TODO: Explain formula for JPEG200 DCINEMA. */
/* TODO: Verify with previous count of codeblocks per band */
/* Compute P_x0 */
prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
(1 << log2_band_prec_width);
prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
/* Compute P_y0 */
prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
(1 << log2_band_prec_height);
prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
/* Compute P_x1 */
prec->coord[0][1] = prec->coord[0][0] +
(1 << log2_band_prec_width);
prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
/* Compute P_y1 */
prec->coord[1][1] = prec->coord[1][0] +
(1 << log2_band_prec_height);
prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
prec->nb_codeblocks_width =
ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
prec->coord[0][0],
band->log2_cblk_width);
prec->nb_codeblocks_height =
ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
prec->coord[1][0],
band->log2_cblk_height);
/* Tag trees initialization */
prec->cblkincl =
ff_j2k_tag_tree_init(prec->nb_codeblocks_width,
prec->nb_codeblocks_height);
if (!prec->cblkincl)
return AVERROR(ENOMEM);
prec->zerobits =
ff_j2k_tag_tree_init(prec->nb_codeblocks_width,
prec->nb_codeblocks_height);
if (!prec->zerobits)
return AVERROR(ENOMEM);
prec->cblk = av_malloc_array(prec->nb_codeblocks_width *
prec->nb_codeblocks_height,
sizeof(*prec->cblk));
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]);
if((bandno + !!reslevelno) & 1) {
cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
}
if((bandno + !!reslevelno) & 2) {
cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
}
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 < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
Jpeg2000Cblk *cblk = prec->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(&prec->cblk);
}
av_freep(&band->prec);
}
av_freep(&reslevel->band);
}
ff_j2k_dwt_destroy(&comp->dwt);
av_freep(&comp->reslevel);
av_freep(&comp->data);
}
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