commit 8d8638a186f5387639c35eeebbd3ab1dff4fc742
author Yue Chen <yuec@google.com> Tue Feb 21 13:28:16 2017 +0800
committer Yue Chen <yuec@google.com> Thu Mar 02 00:17:14 2017 +0000
tree 4e04177ac301f871a4d6a4545c1b6fa339395794
parent ae7c458a7ae7521725da8e58e1e26ea5bd59faed

Use 3-tap spatial filter in FILTER_INTRA experiment

3-tap recursive intra prediction filters are added.
Macro USE_3TAP_INTRA_FILTER is set to 1 to use 3-tap by default.
Coding gain of FILTER_INTRA experiment in AWCY, high delay 150f
3-tap: 0.51%
4-tap: 0.68%

Change-Id: I44192dd08bfd8155f58a9b0b5cf1de88fceb762e

av1/common/blockd.h

diff --git a/av1/common/blockd.h b/av1/common/blockd.h
index ffd0b93..6192291 100644
--- a/av1/common/blockd.h
+++ b/av1/common/blockd.h
@@ -256,6 +256,7 @@
 #endif  // CONFIG_PALETTE
 
 #if CONFIG_FILTER_INTRA
+#define USE_3TAP_INTRA_FILTER 1  // 0: 4-tap; 1: 3-tap
 typedef struct {
   // 1: an ext intra mode is used; 0: otherwise.
   uint8_t use_filter_intra_mode[PLANE_TYPES];