virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-10-30 23:18:11 +02:00
Code Issues Releases Activity

avcodec/jpeg2000dec: Implement progression order RLCP

Browse Source 
This works with one of 2 RLCP samples i have, the other appears to also
use selective arithemtic coding bypass which may or may not be the reason why it does
not work

Sample: p0_16.j2k

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2015-06-11 21:10:44 +02:00
parent fb92f3ecb4
commit 9c8939216b
1 changed files with 24 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
libavcodec/jpeg2000dec.c
View File

@@ -860,7 +860,30 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
s->bit_index = 8;
switch (tile->codsty[0].prog_order) {
case JPEG2000_PGOD_RLCP:
avpriv_request_sample(s->avctx, "Progression order RLCP");
av_log(s->avctx, AV_LOG_WARNING, "Progression order RLCP\n");
ok_reslevel = 1;
for (reslevelno = 0; ok_reslevel; reslevelno++) {
ok_reslevel = 0;
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
if (reslevelno < codsty->nreslevels) {
Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
reslevelno;
ok_reslevel = 1;
for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
if ((ret = jpeg2000_decode_packet(s,
codsty, rlevel,
precno, layno,
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
qntsty->nguardbits)) < 0)
return ret;
}
}
}
}
break;
case JPEG2000_PGOD_LRCP:
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {