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Merge commit 'f9581f1414ec8e3e7d0868793cda4f2e4fa113ea'

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* commit 'f9581f1414ec8e3e7d0868793cda4f2e4fa113ea':
  jpeg2000: Improve reduced resolution decoding
  jpeg2000: Compute quantization for 'scalar derived' in the correct case.
  jpeg2000: Calculate code-block coord in ff_jpeg2000_init_component()

Conflicts:
	libavcodec/jpeg2000.c
	libavcodec/jpeg2000dec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2013-07-03 15:20:37 +02:00
parent c7a092cb2d f9581f1414
commit 11cf4b7247
2 changed files with 13 additions and 14 deletions
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20
libavcodec/jpeg2000.c
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@@ -316,7 +316,7 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
break;
}
/* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
* If not set output of entropic decoder is not correct. */
* If not set output of entropic decoder is not correct. */
if (!av_codec_is_encoder(avctx->codec))
band->f_stepsize *= 0.5;
@@ -451,14 +451,18 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
/* Compute Cy1 */
cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
prec->coord[1][1]);
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];
/* 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];
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;