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Code Issues Releases Activity

avcodec/jpeg2000dec: Support PCRL

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Fixes Ticket4603

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-13 13:56:23 +02:00
parent eb1beb9e1c
commit c3517c377e
1 changed files with 67 additions and 4 deletions
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71
libavcodec/jpeg2000dec.c
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@ -905,6 +905,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
int layno, reslevelno, compno, precno, ok_reslevel;
int x, y;
int tp_index = 0;
int step_x, step_y;
s->bit_index = 8;
switch (tile->codsty[0].prog_order) {
@ -964,11 +965,11 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int step_x = 32;
int step_y = 32;
int maxlogstep_x = 0;
int maxlogstep_y = 0;
int start_x, start_y;
step_x = 32;
step_y = 32;
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
@ -1029,8 +1030,70 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
break;
case JPEG2000_PGOD_PCRL:
avpriv_request_sample(s->avctx, "Progression order PCRL");
ret = AVERROR_PATCHWELCOME;
av_log(s->avctx, AV_LOG_WARNING, "Progression order PCRL");
step_x = 32;
step_y = 32;
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
step_x = FFMIN(step_x, rlevel->log2_prec_width + reducedresno);
step_y = FFMIN(step_y, rlevel->log2_prec_height + reducedresno);
}
}
step_x = 1<<step_x;
step_y = 1<<step_y;
//FIXME we could iterate over less than the whole image
for (y = 0; y < s->height; y += step_y) {
for (x = 0; x < s->width; x += step_x) {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int xc = x / s->cdx[compno];
int yc = y / s->cdy[compno];
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
unsigned prcx, prcy;
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
if (yc % (1 << (rlevel->log2_prec_height + reducedresno)))
continue;
if (xc % (1 << (rlevel->log2_prec_width + reducedresno)))
continue;
// check if a precinct exists
prcx = ff_jpeg2000_ceildivpow2(xc, reducedresno) >> rlevel->log2_prec_width;
prcy = ff_jpeg2000_ceildivpow2(yc, reducedresno) >> rlevel->log2_prec_height;
prcx -= ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], reducedresno) >> rlevel->log2_prec_width;
prcy -= ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], reducedresno) >> rlevel->log2_prec_height;
precno = prcx + rlevel->num_precincts_x * prcy;
if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) {
av_log(s->avctx, AV_LOG_WARNING, "prc %d %d outside limits %d %d\n",
prcx, prcy, rlevel->num_precincts_x, rlevel->num_precincts_y);
continue;
}
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
if ((ret = jpeg2000_decode_packet(s, tile, &tp_index, codsty, rlevel,
precno, layno,
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
qntsty->nguardbits)) < 0)
return ret;
}
}
}
}
}
break;
default: