From 4e11b155345101bac6185b48180e6f36c4850c8b Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 1 Jul 2013 10:01:18 +0200 Subject: jpeg2000: Calculate code-block coord in ff_jpeg2000_init_component() Signed-off-by: Luca Barbato Signed-off-by: Nicolas Bertrand Signed-off-by: Luca Barbato --- libavcodec/jpeg2000.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'libavcodec/jpeg2000.c') diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c index b1236993ac..b3182d63b0 100644 --- a/libavcodec/jpeg2000.c +++ b/libavcodec/jpeg2000.c @@ -443,6 +443,20 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp, /* Compute Cy1 */ cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height), prec->coord[1][1]); + /* Update code-blocks coordinates according sub-band position */ + if ((bandno + !!reslevelno) & 1) { + cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] - + comp->reslevel[reslevelno-1].coord[0][0]; + cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] - + comp->reslevel[reslevelno-1].coord[0][0]; + } + if ((bandno + !!reslevelno) & 2) { + cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] - + comp->reslevel[reslevelno-1].coord[1][0]; + cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] - + comp->reslevel[reslevelno-1].coord[1][0]; + } + cblk->zero = 0; cblk->lblock = 3; cblk->length = 0; -- cgit v1.2.3