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Fix race condition when deblocking is on but SAO is off

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Already suspected this yesterday, but didn't want to add the code to
handle it before confirming that it's actually a problem. It is.
This commit is contained in:
Ari Koivula 2016-03-09 13:59:59 +02:00
parent 1671725c72
commit b0c3ece31e
1 changed files with 13 additions and 2 deletions
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15
src/search_inter.c
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@ -61,13 +61,24 @@ static INLINE bool fracmv_within_tile(const encoder_state_t *state, const vector
static INLINE int get_wpp_limit(const encoder_state_t *state, const vector2d_t* orig)
{
if (state->encoder_control->owf && state->encoder_control->wpp) {
encoder_control_t *ctrl = state->encoder_control;
if (ctrl->owf && ctrl->wpp) {
// Limit motion vectors to the LCU-row below this row.
// To avoid fractional pixel interpolation depending on things outside
// this range, add a margin of 4 pixels.
// - fme needs 4 pixels
// - odd chroma interpolation needs 4 pixels
return 2 * LCU_WIDTH - 4 - orig->y % LCU_WIDTH;
int wpp_limit = 2 * LCU_WIDTH - 4 - orig->y % LCU_WIDTH;
if (ctrl->deblock_enable && !ctrl->sao_enable) {
// As a special case, when deblocking is enabled but SAO is not, we have
// to avoid the possibility of interpolation filters reaching the
// non-deblocked pixels. The deblocking for the horizontal edge on the
// LCU boundary can reach 4 pixels. If SAO is enabled, this WPP-row
// depends on the SAO job, which depends on the deblocking having
// already been done.
wpp_limit -= 4;
}
return wpp_limit;
} else {
return -1;
}