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ffmpeg.wasm-core
Commit 9fd23baa authored by Michael Niedermayer's avatar Michael Niedermayer
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j2k: merge precinct init code from jpeg2000 

Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 3300b5f6
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Showing with 91 additions and 16 deletions
libavcodec/j2k.c
View file @ 9fd23baa
......@@ -26,6 +26,7 @@
* @author Kamil Nowosad
*/
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "avcodec.h"
......@@ -242,10 +243,12 @@ int ff_j2k_init_component(Jpeg2000Component *comp,
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
Jpeg2000Band *band = reslevel->band + bandno;
int cblkno, precx, precy, precno;
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}};
......@@ -315,14 +318,7 @@ int ff_j2k_init_component(Jpeg2000Component *comp,
if (!band->prec)
return AVERROR(ENOMEM);
for (cblkno = 0; cblkno < band->cblknx * band->cblkny; cblkno++) {
Jpeg2000Cblk *cblk = band->cblk + cblkno;
cblk->zero = 0;
cblk->lblock = 3;
cblk->length = 0;
cblk->lengthinc = 0;
cblk->npasses = 0;
}
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;
......@@ -351,18 +347,95 @@ int ff_j2k_init_component(Jpeg2000Component *comp,
Jpeg2000Prec *prec = band->prec + precno;
prec->xi0 = xi0;
prec->xi1 = xi1;
prec->cblkincl = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,
prec->yi1 - prec->yi0);
prec->zerobits = ff_j2k_tag_tree_init(prec->xi1 - prec->xi0,
prec->yi1 - prec->yi0);
if (!prec->cblkincl || !prec->zerobits)
return AVERROR(ENOMEM);
}
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));
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;
......
libavcodec/j2k.h
View file @ 9fd23baa
......@@ -163,6 +163,7 @@ typedef struct Jpeg2000Cblk {
uint8_t zero;
uint8_t data[8192];
Jpeg2000Pass passes[100];
uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Cblk; // code block
typedef struct Jpeg2000Prec {
......@@ -172,6 +173,7 @@ typedef struct Jpeg2000Prec {
Jpeg2000TgtNode *zerobits;
Jpeg2000TgtNode *cblkincl;
Jpeg2000Cblk *cblk;
uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Prec; // precinct
typedef struct Jpeg2000Band {
......
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