42868ca569
pow is a very wasteful function for this purpose. A low hanging fruit
would be simply to replace with exp2f, and that does yield some speedup.
However, there are 2 drawbacks of this:
1. It does not exploit the integer nature of the argument.
2. (minor) Some platforms lack a proper exp2f routine, making benefits available
only to non broken libm.
3. exp2f does not solve the same issue that plagues pow, namely terrible
worst case performance. This is a fundamental issue known as the
"table-maker's dilemma" recognized by Prof. Kahan himself and
subsequently elaborated and researched by many others. All this is clear from benchmarks below.
This exploits the IEEE-754 format to get very good performance even in
the worst case for integer powers of 2. This solves all the issues noted
above. Function tested with clang usan over [-1000, 1000] (beyond range of
relevance for this, which is [-255, 255]), patch itself with FATE.
Benchmarks obtained on x86-64, Haswell, GNU-Linux via 10^5 iterations of
the pow call, START/STOP, and command ffplay ~/samples/jpeg2000/chiens_dcinema2K.mxf.
Low number of runs also given to prove the point about worst case:
pow:
216270 decicycles in pow, 1 runs, 0 skips
110175 decicycles in pow, 2 runs, 0 skips
56085 decicycles in pow, 4 runs, 0 skips
29013 decicycles in pow, 8 runs, 0 skips
15472 decicycles in pow, 16 runs, 0 skips
8689 decicycles in pow, 32 runs, 0 skips
5295 decicycles in pow, 64 runs, 0 skips
3599 decicycles in pow, 128 runs, 0 skips
2748 decicycles in pow, 256 runs, 0 skips
2304 decicycles in pow, 511 runs, 1 skips
2072 decicycles in pow, 1022 runs, 2 skips
1963 decicycles in pow, 2044 runs, 4 skips
1894 decicycles in pow, 4091 runs, 5 skips
1860 decicycles in pow, 8184 runs, 8 skips
exp2f:
134140 decicycles in pow, 1 runs, 0 skips
68110 decicycles in pow, 2 runs, 0 skips
34530 decicycles in pow, 4 runs, 0 skips
17677 decicycles in pow, 8 runs, 0 skips
9175 decicycles in pow, 16 runs, 0 skips
4931 decicycles in pow, 32 runs, 0 skips
2808 decicycles in pow, 64 runs, 0 skips
1747 decicycles in pow, 128 runs, 0 skips
1208 decicycles in pow, 256 runs, 0 skips
952 decicycles in pow, 512 runs, 0 skips
822 decicycles in pow, 1024 runs, 0 skips
765 decicycles in pow, 2047 runs, 1 skips
722 decicycles in pow, 4094 runs, 2 skips
693 decicycles in pow, 8190 runs, 2 skips
exp2fi:
2740 decicycles in pow, 1 runs, 0 skips
1530 decicycles in pow, 2 runs, 0 skips
955 decicycles in pow, 4 runs, 0 skips
622 decicycles in pow, 8 runs, 0 skips
477 decicycles in pow, 16 runs, 0 skips
368 decicycles in pow, 32 runs, 0 skips
317 decicycles in pow, 64 runs, 0 skips
291 decicycles in pow, 128 runs, 0 skips
277 decicycles in pow, 256 runs, 0 skips
268 decicycles in pow, 512 runs, 0 skips
265 decicycles in pow, 1024 runs, 0 skips
263 decicycles in pow, 2048 runs, 0 skips
263 decicycles in pow, 4095 runs, 1 skips
260 decicycles in pow, 8191 runs, 1 skips
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
628 lines
23 KiB
C
628 lines
23 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* JPEG 2000 image encoder and decoder common functions
|
|
*/
|
|
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/mem.h"
|
|
#include "avcodec.h"
|
|
#include "jpeg2000.h"
|
|
|
|
#define SHL(a, n) ((n) >= 0 ? (a) << (n) : (a) >> -(n))
|
|
|
|
/* tag tree routines */
|
|
|
|
/* allocate the memory for tag tree */
|
|
static int32_t tag_tree_size(int w, int h)
|
|
{
|
|
int64_t res = 0;
|
|
while (w > 1 || h > 1) {
|
|
res += w * (int64_t)h;
|
|
av_assert0(res + 1 < INT32_MAX);
|
|
w = (w + 1) >> 1;
|
|
h = (h + 1) >> 1;
|
|
}
|
|
return (int32_t)(res + 1);
|
|
}
|
|
|
|
static Jpeg2000TgtNode *ff_jpeg2000_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;
|
|
}
|
|
}
|
|
|
|
uint8_t ff_jpeg2000_sigctxno_lut[256][4];
|
|
|
|
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;
|
|
}
|
|
|
|
uint8_t ff_jpeg2000_sgnctxno_lut[16][16], ff_jpeg2000_xorbit_lut[16][16];
|
|
|
|
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 av_cold ff_jpeg2000_init_tier1_luts(void)
|
|
{
|
|
int i, j;
|
|
for (i = 0; i < 256; i++)
|
|
for (j = 0; j < 4; j++)
|
|
ff_jpeg2000_sigctxno_lut[i][j] = getsigctxno(i, j);
|
|
for (i = 0; i < 16; i++)
|
|
for (j = 0; j < 16; j++)
|
|
ff_jpeg2000_sgnctxno_lut[i][j] =
|
|
getsgnctxno(i + (j << 8), &ff_jpeg2000_xorbit_lut[i][j]);
|
|
}
|
|
|
|
void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
|
|
int negative)
|
|
{
|
|
x++;
|
|
y++;
|
|
t1->flags[(y) * t1->stride + x] |= JPEG2000_T1_SIG;
|
|
if (negative) {
|
|
t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W | JPEG2000_T1_SGN_W;
|
|
t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E | JPEG2000_T1_SGN_E;
|
|
t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N | JPEG2000_T1_SGN_N;
|
|
t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S | JPEG2000_T1_SGN_S;
|
|
} else {
|
|
t1->flags[(y) * t1->stride + x + 1] |= JPEG2000_T1_SIG_W;
|
|
t1->flags[(y) * t1->stride + x - 1] |= JPEG2000_T1_SIG_E;
|
|
t1->flags[(y + 1) * t1->stride + x] |= JPEG2000_T1_SIG_N;
|
|
t1->flags[(y - 1) * t1->stride + x] |= JPEG2000_T1_SIG_S;
|
|
}
|
|
t1->flags[(y + 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_NW;
|
|
t1->flags[(y + 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_NE;
|
|
t1->flags[(y - 1) * t1->stride + x + 1] |= JPEG2000_T1_SIG_SW;
|
|
t1->flags[(y - 1) * t1->stride + x - 1] |= JPEG2000_T1_SIG_SE;
|
|
}
|
|
|
|
// static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } }; (unused)
|
|
|
|
static inline float exp2fi(int x) {
|
|
/* Normal range */
|
|
if (-126 <= x && x <= 128)
|
|
return av_int2float(x+127 << 23);
|
|
/* Too large */
|
|
else if (x > 128)
|
|
return INFINITY;
|
|
/* Subnormal numbers */
|
|
else if (x > -150)
|
|
return av_int2float(1 << (x+149));
|
|
/* Negligibly small */
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static void init_band_stepsize(AVCodecContext *avctx,
|
|
Jpeg2000Band *band,
|
|
Jpeg2000CodingStyle *codsty,
|
|
Jpeg2000QuantStyle *qntsty,
|
|
int bandno, int gbandno, int reslevelno,
|
|
int cbps)
|
|
{
|
|
/* TODO: Implementation of quantization step not finished,
|
|
* see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
|
|
switch (qntsty->quantsty) {
|
|
uint8_t gain;
|
|
case JPEG2000_QSTY_NONE:
|
|
/* TODO: to verify. No quantization in this case */
|
|
band->f_stepsize = 1;
|
|
break;
|
|
case JPEG2000_QSTY_SI:
|
|
/*TODO: Compute formula to implement. */
|
|
// numbps = cbps +
|
|
// lut_gain[codsty->transform == FF_DWT53][bandno + (reslevelno > 0)];
|
|
// band->f_stepsize = SHL(2048 + qntsty->mant[gbandno],
|
|
// 2 + numbps - qntsty->expn[gbandno]);
|
|
// break;
|
|
case JPEG2000_QSTY_SE:
|
|
/* Exponent quantization step.
|
|
* Formula:
|
|
* delta_b = 2 ^ (R_b - expn_b) * (1 + (mant_b / 2 ^ 11))
|
|
* R_b = R_I + log2 (gain_b )
|
|
* see ISO/IEC 15444-1:2002 E.1.1 eqn. E-3 and E-4 */
|
|
gain = cbps;
|
|
band->f_stepsize = exp2fi(gain - qntsty->expn[gbandno]);
|
|
band->f_stepsize *= qntsty->mant[gbandno] / 2048.0 + 1.0;
|
|
break;
|
|
default:
|
|
band->f_stepsize = 0;
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
|
|
break;
|
|
}
|
|
if (codsty->transform != FF_DWT53) {
|
|
int lband = 0;
|
|
switch (bandno + (reslevelno > 0)) {
|
|
case 1:
|
|
case 2:
|
|
band->f_stepsize *= F_LFTG_X * 2;
|
|
lband = 1;
|
|
break;
|
|
case 3:
|
|
band->f_stepsize *= F_LFTG_X * F_LFTG_X * 4;
|
|
break;
|
|
}
|
|
if (codsty->transform == FF_DWT97) {
|
|
band->f_stepsize *= pow(F_LFTG_K, 2*(codsty->nreslevels2decode - reslevelno) + lband - 2);
|
|
}
|
|
}
|
|
|
|
band->i_stepsize = band->f_stepsize * (1 << 15);
|
|
|
|
/* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
|
|
* If not set output of entropic decoder is not correct. */
|
|
if (!av_codec_is_encoder(avctx->codec))
|
|
band->f_stepsize *= 0.5;
|
|
}
|
|
|
|
static int init_prec(Jpeg2000Band *band,
|
|
Jpeg2000ResLevel *reslevel,
|
|
Jpeg2000Component *comp,
|
|
int precno, int bandno, int reslevelno,
|
|
int log2_band_prec_width,
|
|
int log2_band_prec_height)
|
|
{
|
|
Jpeg2000Prec *prec = band->prec + precno;
|
|
int nb_codeblocks, cblkno;
|
|
|
|
prec->decoded_layers = 0;
|
|
|
|
/* TODO: Explain formula for JPEG200 DCINEMA. */
|
|
/* TODO: Verify with previous count of codeblocks per band */
|
|
|
|
/* Compute P_x0 */
|
|
prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) *
|
|
(1 << log2_band_prec_width);
|
|
|
|
/* Compute P_y0 */
|
|
prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) *
|
|
(1 << log2_band_prec_height);
|
|
|
|
/* Compute P_x1 */
|
|
prec->coord[0][1] = prec->coord[0][0] +
|
|
(1 << log2_band_prec_width);
|
|
prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
|
|
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][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
|
|
prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
|
|
|
|
prec->nb_codeblocks_width =
|
|
ff_jpeg2000_ceildivpow2(prec->coord[0][1],
|
|
band->log2_cblk_width)
|
|
- (prec->coord[0][0] >> band->log2_cblk_width);
|
|
prec->nb_codeblocks_height =
|
|
ff_jpeg2000_ceildivpow2(prec->coord[1][1],
|
|
band->log2_cblk_height)
|
|
- (prec->coord[1][0] >> band->log2_cblk_height);
|
|
|
|
|
|
/* Tag trees initialization */
|
|
prec->cblkincl =
|
|
ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
|
|
prec->nb_codeblocks_height);
|
|
if (!prec->cblkincl)
|
|
return AVERROR(ENOMEM);
|
|
|
|
prec->zerobits =
|
|
ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
|
|
prec->nb_codeblocks_height);
|
|
if (!prec->zerobits)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (prec->nb_codeblocks_width * (uint64_t)prec->nb_codeblocks_height > INT_MAX) {
|
|
prec->cblk = NULL;
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
|
|
prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
|
|
if (!prec->cblk)
|
|
return AVERROR(ENOMEM);
|
|
for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
|
|
Jpeg2000Cblk *cblk = prec->cblk + cblkno;
|
|
int 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]);
|
|
/* Update code-blocks coordinates according sub-band position */
|
|
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;
|
|
memset(cblk->lengthinc, 0, sizeof(cblk->lengthinc));
|
|
cblk->npasses = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int init_band(AVCodecContext *avctx,
|
|
Jpeg2000ResLevel *reslevel,
|
|
Jpeg2000Component *comp,
|
|
Jpeg2000CodingStyle *codsty,
|
|
Jpeg2000QuantStyle *qntsty,
|
|
int bandno, int gbandno, int reslevelno,
|
|
int cbps, int dx, int dy)
|
|
{
|
|
Jpeg2000Band *band = reslevel->band + bandno;
|
|
uint8_t log2_band_prec_width, log2_band_prec_height;
|
|
int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
|
|
int precno;
|
|
int nb_precincts;
|
|
int i, j, ret;
|
|
|
|
init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);
|
|
|
|
/* computation of tbx_0, tbx_1, tby_0, tby_1
|
|
* see ISO/IEC 15444-1:2002 B.5 eq. B-15 and tbl B.1
|
|
* codeblock width and height is computed for
|
|
* DCI JPEG 2000 codeblock_width = codeblock_width = 32 = 2 ^ 5 */
|
|
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_o[i][j],
|
|
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_o[i][j] -
|
|
(((bandno + 1 >> i) & 1LL) << 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;
|
|
}
|
|
|
|
if (reslevel->num_precincts_x * (uint64_t)reslevel->num_precincts_y > INT_MAX) {
|
|
band->prec = NULL;
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
nb_precincts = reslevel->num_precincts_x * reslevel->num_precincts_y;
|
|
band->prec = av_mallocz_array(nb_precincts, sizeof(*band->prec));
|
|
if (!band->prec)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (precno = 0; precno < nb_precincts; precno++) {
|
|
ret = init_prec(band, reslevel, comp,
|
|
precno, bandno, reslevelno,
|
|
log2_band_prec_width, log2_band_prec_height);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ff_jpeg2000_init_component(Jpeg2000Component *comp,
|
|
Jpeg2000CodingStyle *codsty,
|
|
Jpeg2000QuantStyle *qntsty,
|
|
int cbps, int dx, int dy,
|
|
AVCodecContext *avctx)
|
|
{
|
|
int reslevelno, bandno, gbandno = 0, ret, i, j;
|
|
uint32_t csize;
|
|
|
|
if (codsty->nreslevels2decode <= 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "nreslevels2decode %d invalid or uninitialized\n", codsty->nreslevels2decode);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
|
|
codsty->nreslevels2decode - 1,
|
|
codsty->transform))
|
|
return ret;
|
|
|
|
if (av_image_check_size(comp->coord[0][1] - comp->coord[0][0],
|
|
comp->coord[1][1] - comp->coord[1][0], 0, avctx))
|
|
return AVERROR_INVALIDDATA;
|
|
csize = (comp->coord[0][1] - comp->coord[0][0]) *
|
|
(comp->coord[1][1] - comp->coord[1][0]);
|
|
if (comp->coord[0][1] - comp->coord[0][0] > 32768 ||
|
|
comp->coord[1][1] - comp->coord[1][0] > 32768) {
|
|
av_log(avctx, AV_LOG_ERROR, "component size too large\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
if (codsty->transform == FF_DWT97) {
|
|
csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->f_data);
|
|
comp->i_data = NULL;
|
|
comp->f_data = av_mallocz_array(csize, sizeof(*comp->f_data));
|
|
if (!comp->f_data)
|
|
return AVERROR(ENOMEM);
|
|
} else {
|
|
csize += AV_INPUT_BUFFER_PADDING_SIZE / sizeof(*comp->i_data);
|
|
comp->f_data = NULL;
|
|
comp->i_data = av_mallocz_array(csize, sizeof(*comp->i_data));
|
|
if (!comp->i_data)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
comp->reslevel = av_mallocz_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_o[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 which 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_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
|
|
if (!reslevel->band)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
|
|
ret = init_band(avctx, reslevel,
|
|
comp, codsty, qntsty,
|
|
bandno, gbandno, reslevelno,
|
|
cbps, dx, dy);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ff_jpeg2000_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->nb_codeblocks_width, prec->nb_codeblocks_height);
|
|
tag_tree_zero(prec->cblkincl, prec->nb_codeblocks_width, prec->nb_codeblocks_height);
|
|
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_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty)
|
|
{
|
|
int reslevelno, bandno, precno;
|
|
for (reslevelno = 0;
|
|
comp->reslevel && reslevelno < codsty->nreslevels;
|
|
reslevelno++) {
|
|
Jpeg2000ResLevel *reslevel;
|
|
|
|
if (!comp->reslevel)
|
|
continue;
|
|
|
|
reslevel = comp->reslevel + reslevelno;
|
|
for (bandno = 0; bandno < reslevel->nbands; bandno++) {
|
|
Jpeg2000Band *band;
|
|
|
|
if (!reslevel->band)
|
|
continue;
|
|
|
|
band = reslevel->band + bandno;
|
|
for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++) {
|
|
if (band->prec) {
|
|
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_dwt_destroy(&comp->dwt);
|
|
av_freep(&comp->reslevel);
|
|
av_freep(&comp->i_data);
|
|
av_freep(&comp->f_data);
|
|
}
|