enabled 8x8 intra prediction modes on inter frames

This commit enabled the usage of 8x8 intra prediction modes on inter
frames. There are a few TODO items related to this: 1)baseline entropy
need be calibrated; 2)cost of UV need to be done more properly rather
than using decision only relying on Y; 3)Threshold for allowing picking
8x8 intra prediction should be lowered to lower than the B_PRED.

Even with all the TODOs, tests showed consistent gain on derf set ~0.1%
(PSNR:0.08% and SSIM:0.14%). It is assumed that 8x8 intra prediction
will help more on large resolution clips, especially with above TODOs
addressed.

Change-Id: I398ada49dfc32575cfab962a569c2885111ae3ba

1 files changed, 8 insertions, 2 deletions

diff --git a/vp8/encoder/onyx_int.h b/vp8/encoder/onyx_int.h
index 622f25068..160f22d05 100644
--- a/vp8/encoder/onyx_int.h
+++ b/vp8/encoder/onyx_int.h
@@ -42,8 +42,11 @@
 #define AF_THRESH   25
 #define AF_THRESH2  100
 #define ARF_DECAY_THRESH 12
+#if CONFIG_I8X8
+#define MAX_MODES 21
+#else
 #define MAX_MODES 20
-
+#endif
 #define MIN_THRESHMULT  32
 #define MAX_THRESHMULT  512
 
@@ -74,7 +77,7 @@ typedef struct
     int uv_modes[VP8_UV_MODES];
     int i8x8_modes[VP8_I8X8_MODES];
     int b_modes[10];
-    int inter_y_modes[10];
+    int inter_y_modes[MB_MODE_COUNT];
     int inter_uv_modes[VP8_UV_MODES];
     int inter_b_modes[10];
 #endif
@@ -186,6 +189,9 @@ typedef enum
     THR_SPLITA         = 18,
 
     THR_B_PRED         = 19,
+#if CONFIG_I8X8
+    THR_I8X8_PRED      = 20,
+#endif
 }
 THR_MODES;