RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-18 21:45:10 +00:00
Code Issues Projects Releases Wiki Activity

lavc/vvc: Use second definition of MinQtLog2SizeIntraC if relevant

Browse Source 
MinQtLog2SizeIntraC is usually (eq. (51) from VVCv3) defined as

sps_log2_diff_min_qt_min_cb_intra_slice_chroma + MinCbLog2SizeY

However, in the case ph_log2_diff_min_qt_min_cb_intra_slice_chroma is
present, it is instead (eq. (83) from VVCv3) defined as

ph_log2_diff_min_qt_min_cb_intra_slice_chroma + MinCbLog2SizeY

When ph_log2_diff_max_bt_min_qt_intra_slice_chroma and
ph_log2_diff_max_tt_min_qt_intra_slice_chroma are present, so is
ph_log2_diff_min_qt_min_cb_intra_slice_chroma, and so we should use the
second definition of MinQtLog2SizeIntraC, rather than the first, when
calculating the bounds for these syntax elements.

Signed-off-by: Frank Plowman <post@frankplowman.com>
This commit is contained in:
Frank Plowman 2024-11-28 22:17:23 +00:00 committed by Nuo Mi
parent a280e2e646
commit 9221cb0443
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/cbs_h266_syntax_template.c
View File

@ -2812,7 +2812,7 @@ static int FUNC(picture_header) (CodedBitstreamContext *ctx, RWContext *rw,
0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
if (sps->sps_max_mtt_hierarchy_depth_intra_slice_chroma != 0) {
unsigned int min_qt_log2_size_intra_c =
sps->sps_log2_diff_min_qt_min_cb_intra_slice_chroma +
current->ph_log2_diff_min_qt_min_cb_intra_slice_chroma +
min_cb_log2_size_y;
ue(ph_log2_diff_max_bt_min_qt_intra_slice_chroma,
0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_c);