Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

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

Browse Source 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/138/head
Michael Niedermayer 10 years ago
parent d9841e53e2
commit a206c13289
2 changed files with 8 additions and 8 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 12
      libavcodec/jpeg2000.c
  2. 4
      libavcodec/jpeg2000dec.c

12
libavcodec/jpeg2000.c
Unescape View File

@ -437,22 +437,22 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
/* Compute coordinates of codeblocks */
/* 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);
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*/
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);
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 */
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 */
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 */
if ((bandno + !!reslevelno) & 1) {
cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -

4
libavcodec/jpeg2000dec.c
Unescape View File

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

Write Preview
Loading…
Cancel
Save