[FFmpeg-cvslog] avcodec/jpeg2000dec: Try to fix remaining DCinema hardcoded TODOs in CPRL
Michael Niedermayer
git at videolan.org
Sat Jun 13 14:20:48 CEST 2015
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Jun 13 13:22:05 2015 +0200| [eb1beb9e1c132104925e19616ef111065a16de93] | committer: Michael Niedermayer
avcodec/jpeg2000dec: Try to fix remaining DCinema hardcoded TODOs in CPRL
Again, no testcase
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=eb1beb9e1c132104925e19616ef111065a16de93
---
libavcodec/jpeg2000dec.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 4e644f8..6ceb7ce 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -968,6 +968,7 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
int step_y = 32;
int maxlogstep_x = 0;
int maxlogstep_y = 0;
+ int start_x, start_y;
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
@@ -980,26 +981,27 @@ static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile
step_x = 1<<step_x;
step_y = 1<<step_y;
- y = comp->coord_o[1][0] >> maxlogstep_y << maxlogstep_y;
- for (; y < comp->coord_o[1][1]; y += step_y) {
- x = comp->coord_o[0][0] >> maxlogstep_x << maxlogstep_x;
- for (; x < comp->coord_o[0][1]; x += step_x) {
+ start_y = comp->coord_o[1][0] >> maxlogstep_y << maxlogstep_y;
+ start_x = comp->coord_o[0][0] >> maxlogstep_x << maxlogstep_x;
+ for (y = start_y; y < comp->coord_o[1][1]; y += step_y) {
+ for (x = start_x; x < comp->coord_o[0][1]; x += step_x) {
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
- uint16_t prcx, prcy;
+ unsigned prcx, prcy;
uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
- if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) ||
- (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
+ if (y % (1 << (rlevel->log2_prec_height + reducedresno)))
continue;
- if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) ||
- (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema
+ if (x % (1 << (rlevel->log2_prec_width + reducedresno)))
continue;
// check if a precinct exists
prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width;
prcy = ff_jpeg2000_ceildivpow2(y, 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) {
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