RTC: Add compound skip thresholds for block 128 and 16
This commit adds some heuristic thresholds for skipping compound modes
on BLOCK_128X128 and BLOCK_16X16. The encoder's behavior is unaffected
as compound mode is not enabled for those two block sizes.
Change-Id: Ia803521ae8ebf23bd8057b6d1ad1c3ebacb95d3e
diff --git a/av1/encoder/nonrd_pickmode.c b/av1/encoder/nonrd_pickmode.c
index 714e6ca..df12354 100644
--- a/av1/encoder/nonrd_pickmode.c
+++ b/av1/encoder/nonrd_pickmode.c
@@ -2583,12 +2583,15 @@
const unsigned int thresh_64 = (unsigned int)(0.57356805f * 8659);
const unsigned int thresh_32 = (unsigned int)(0.23964763f * 4281);
- if (bsize == BLOCK_64X64) {
- return best_var < thresh_64;
- } else if (bsize == BLOCK_32X32) {
- return best_var < thresh_32;
+ // Currently, the thresh for 128 and 16 are not well-tuned. We are using the
+ // results from 64 and 32 as an heuristic.
+ switch (bsize) {
+ case BLOCK_128X128: return best_var < 4 * thresh_64;
+ case BLOCK_64X64: return best_var < thresh_64;
+ case BLOCK_32X32: return best_var < thresh_32;
+ case BLOCK_16X16: return best_var < thresh_32 / 4;
+ default: return false;
}
- return false;
}
static AOM_FORCE_INLINE void fill_single_inter_mode_costs(
