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avcodec/jpeg2000dec: Do not hardcode tile part usage

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Fixes part of Ticket 4605

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/138/head
Michael Niedermayer 10 years ago
parent 1b3fbe41c5
commit e7adb02d3b
1 changed files with 11 additions and 9 deletions
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  1. 20
      libavcodec/jpeg2000dec.c

20
libavcodec/jpeg2000dec.c
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@ -758,7 +758,7 @@ static int getlblockinc(Jpeg2000DecoderContext *s)
return res;
}
static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, int *tp_index,
Jpeg2000CodingStyle *codsty,
Jpeg2000ResLevel *rlevel, int precno,
int layno, uint8_t *expn, int numgbits)
@ -766,6 +766,12 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
int bandno, cblkno, ret, nb_code_blocks;
int cwsno;
if (bytestream2_get_bytes_left(&s->g) == 0 && s->bit_index == 8) {
if (*tp_index < FF_ARRAY_ELEMS(tile->tile_part) - 1) {
s->g = tile->tile_part[++(*tp_index)].tpg;
}
}
if (!(ret = get_bits(s, 1))) {
jpeg2000_flush(s);
return 0;
@ -895,6 +901,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
int ret = 0;
int layno, reslevelno, compno, precno, ok_reslevel;
int x, y;
int tp_index = 0;
s->bit_index = 8;
switch (tile->codsty[0].prog_order) {
@ -912,7 +919,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
reslevelno;
ok_reslevel = 1;
for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
if ((ret = jpeg2000_decode_packet(s,
if ((ret = jpeg2000_decode_packet(s, tile, &tp_index,
codsty, rlevel,
precno, layno,
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
@ -937,7 +944,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
reslevelno;
ok_reslevel = 1;
for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++)
if ((ret = jpeg2000_decode_packet(s,
if ((ret = jpeg2000_decode_packet(s, tile, &tp_index,
codsty, rlevel,
precno, layno,
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
@ -954,11 +961,6 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
/* Set bit stream buffer address according to tile-part.
* For DCinema one tile-part per component, so can be
* indexed by component. */
s->g = tile->tile_part[compno].tpg;
/* Position loop (y axis)
* TODO: Automate computing of step 256.
* Fixed here, but to be computed before entering here. */
@ -989,7 +991,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
return AVERROR_PATCHWELCOME;
for (layno = 0; layno < tile->codsty[0].nlayers; layno++) {
if ((ret = jpeg2000_decode_packet(s, codsty, rlevel,
if ((ret = jpeg2000_decode_packet(s, tile, &tp_index, codsty, rlevel,
precno, layno,
qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0),
qntsty->nguardbits)) < 0)

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