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Fix a motion vector out of range bug

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This patch fixed a motion vector(MV) out of range bug, which was caused
by not restoring the original values of the MV min/max thresholds after
the sub8x8 full pixel motion search. It occurred rarely and only was seen
while encoding a 4k clip for 200 frames.

BUG=webm:1271

Change-Id: Ibc4e0de80846f297431923cef8a0c80fe8dcc6a5
This commit is contained in:
Yunqing Wang 2016-08-05 15:09:13 -07:00
parent 57f49db81f
commit 2fb826c4d5
1 changed files with 9 additions and 0 deletions
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9
vp9/encoder/vp9_rdopt.c
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@ -1958,6 +1958,10 @@ static int64_t rd_pick_best_sub8x8_mode(
MV mvp_full;
int max_mv;
int cost_list[5];
int tmp_col_min = x->mv_col_min;
int tmp_col_max = x->mv_col_max;
int tmp_row_min = x->mv_row_min;
int tmp_row_max = x->mv_row_max;
/* Is the best so far sufficiently good that we cant justify doing
* and new motion search. */
@ -2005,6 +2009,11 @@ static int64_t rd_pick_best_sub8x8_mode(
sf->mv.subpel_search_method != SUBPEL_TREE ? cost_list : NULL,
&bsi->ref_mv[0]->as_mv, new_mv, INT_MAX, 1);
x->mv_col_min = tmp_col_min;
x->mv_col_max = tmp_col_max;
x->mv_row_min = tmp_row_min;
x->mv_row_max = tmp_row_max;
if (bestsme < UINT_MAX) {
uint32_t distortion;
cpi->find_fractional_mv_step(