ref: 3d6479cee8170cbcc1b6c3cea7338e86b3594683
parent: d04d0a6cf61c14f65c6cb3c07bbc8096bab564db
author: Luc Trudeau <ltrudeau@twoorioles.com>
date: Fri May 17 10:43:05 EDT 2019
Remove one multiply in Z2 filter top left
--- a/src/ipred_prepare_tmpl.c
+++ b/src/ipred_prepare_tmpl.c
@@ -191,14 +191,14 @@
}
if (av1_intra_prediction_edges[mode].needs_topleft) {- if (have_left) {+ if (have_left)
*topleft_out = have_top ? dst_top[-1] : dst[-1];
- } else {+ else
*topleft_out = have_top ? *dst_top : (1 << bitdepth) >> 1;
- }
+
if (mode == Z2_PRED && tw + th >= 6 && filter_edge)
- *topleft_out = (topleft_out[-1] * 5 + topleft_out[0] * 6 +
- topleft_out[1] * 5 + 8) >> 4;
+ *topleft_out = ((topleft_out[-1] + topleft_out[1]) * 5 +
+ topleft_out[0] * 6 + 8) >> 4;
}
return mode;