[FFmpeg-cvslog] j2k: fix band coord

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Mon May 27 14:31:05 2013 +0200| [5161c62595d694ecaa451f4f016c2cac4de98bec] | committer: Michael Niedermayer

j2k: fix band coord

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5161c62595d694ecaa451f4f016c2cac4de98bec
---

 libavcodec/j2k.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavcodec/j2k.c b/libavcodec/j2k.c
index 0425267..c34a7d1 100644
--- a/libavcodec/j2k.c
+++ b/libavcodec/j2k.c
@@ -264,9 +264,8 @@ int ff_j2k_init_component(Jpeg2000Component *comp,
                 for (i = 0; i < 2; i++)
                     for (j = 0; j < 2; j++)
                         band->coord[i][j] =
-                            ff_jpeg2000_ceildivpow2(comp->coord[i][j],
+                            ff_jpeg2000_ceildivpow2(comp->coord[i][j] - comp->coord[i][0],
                                                     declvl - 1);
-
                 log2_band_prec_width  = reslevel->log2_prec_width;
                 log2_band_prec_height = reslevel->log2_prec_height;
                 /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */
@@ -281,7 +280,7 @@ int ff_j2k_init_component(Jpeg2000Component *comp,
                     for (j = 0; j < 2; j++)
                         /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */
                         band->coord[i][j] =
-                            ff_jpeg2000_ceildivpow2(comp->coord[i][j] -
+                            ff_jpeg2000_ceildivpow2(comp->coord[i][j] - comp->coord[i][0] -
                                                     (((bandno + 1 >> i) & 1) << declvl - 1),
                                                     declvl);
                 /* TODO: Manage case of 3 band offsets here or