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jpeg2000: Use the matching coding style struct for transform selection 

Fixes a null pointer dereference.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2013-07-01 10:01:39 +02:00 committed by Luca Barbato
parent c4604b8792
commit 95a57d26d8
1 changed files with 4 additions and 2 deletions
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6
libavcodec/jpeg2000dec.c
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@ -1160,6 +1160,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
if (s->precision <= 8) {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
float *datap = comp->f_data;
int32_t *i_datap = comp->i_data;
int cbps = s->cbps[compno];
@ -1173,7 +1174,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = line + x * s->ncomponents + compno;
if (tile->codsty->transform == FF_DWT97) {
if (codsty->transform == FF_DWT97) {
for (; x < w; x += s->cdx[compno]) {
int val = lrintf(*datap) + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
@ -1198,6 +1199,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
} else {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
float *datap = comp->f_data;
int32_t *i_datap = comp->i_data;
uint16_t *linel;
@ -1210,7 +1212,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
uint16_t *dst;
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = linel + (x * s->ncomponents + compno);
if (tile->codsty->transform == FF_DWT97) {
if (codsty->transform == FF_DWT97) {
for (; x < w; x += s-> cdx[compno]) {
int val = lrintf(*datap) + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */