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ffmpeg.wasm-core
Commit 67fc8982 authored by Michael Niedermayer's avatar Michael Niedermayer
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avcodec/jpeg2000: Improve right bottom precinct positions 

Fixes Ticket4656
Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 2d8bf3d1
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Showing with 4 additions and 4 deletions
libavcodec/jpeg2000.c
View file @ 67fc8982
......@@ -395,23 +395,23 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
/* TODO: Verify with previous count of codeblocks per band */
/* Compute P_x0 */
prec->coord[0][0] = ((band->coord[0][0] >> reslevel->log2_prec_width) + precno % reslevel->num_precincts_x) *
prec->coord[0][0] = ((band->coord[0][0] >> log2_band_prec_width) + precno % reslevel->num_precincts_x) *
(1 << log2_band_prec_width);
prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
/* Compute P_y0 */
prec->coord[1][0] = ((band->coord[1][0] >> reslevel->log2_prec_height) + precno / reslevel->num_precincts_x) *
prec->coord[1][0] = ((band->coord[1][0] >> log2_band_prec_height) + precno / reslevel->num_precincts_x) *
(1 << log2_band_prec_height);
prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
/* Compute P_x1 */
prec->coord[0][1] = prec->coord[0][0] +
(1 << log2_band_prec_width);
prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
/* Compute P_y1 */
prec->coord[1][1] = prec->coord[1][0] +
(1 << log2_band_prec_height);
prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
prec->nb_codeblocks_width =
......
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