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avcodec/jpeg2000: Change codeblock coords to same origin as bands

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-14 20:02:06 +02:00
parent d9841e53e2
commit a206c13289
2 changed files with 8 additions and 8 deletions
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12
libavcodec/jpeg2000.c
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@ -437,22 +437,22 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
/* Compute coordinates of codeblocks */ /* Compute coordinates of codeblocks */
/* Compute Cx0*/ /* Compute Cx0*/
Cx0 = ((prec->coord[0][0] - band->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width; Cx0 = ((prec->coord[0][0]) >> band->log2_cblk_width) << band->log2_cblk_width;
Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width); Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0] - band->coord[0][0]); cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
/* Compute Cy0*/ /* Compute Cy0*/
Cy0 = ((prec->coord[1][0] - band->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height; Cy0 = ((prec->coord[1][0]) >> band->log2_cblk_height) << band->log2_cblk_height;
Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height); Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0] - band->coord[1][0]); cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
/* Compute Cx1 */ /* Compute Cx1 */
cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width), cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
prec->coord[0][1] - band->coord[0][0]); prec->coord[0][1]);
/* Compute Cy1 */ /* Compute Cy1 */
cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height), cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
prec->coord[1][1] - band->coord[1][0]); prec->coord[1][1]);
/* Update code-blocks coordinates according sub-band position */ /* Update code-blocks coordinates according sub-band position */
if ((bandno + !!reslevelno) & 1) { if ((bandno + !!reslevelno) & 1) {
cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] - cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -

4
libavcodec/jpeg2000dec.c
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@ -1524,8 +1524,8 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
cblk->coord[1][1] - cblk->coord[1][0], cblk->coord[1][1] - cblk->coord[1][0],
bandpos); bandpos);
x = cblk->coord[0][0]; x = cblk->coord[0][0] - band->coord[0][0];
y = cblk->coord[1][0]; y = cblk->coord[1][0] - band->coord[1][0];
if (codsty->transform == FF_DWT97) if (codsty->transform == FF_DWT97)
dequantization_float(x, y, cblk, comp, &t1, band); dequantization_float(x, y, cblk, comp, &t1, band);