Try to enable 8x8 tranform for smaller resolution

The commit overall on derf test is break even to very slightly positive
comparing to all 4x4 transform.

Change-Id: I2a7c19599aa54c2d3a5b35db0dc891ba8a6a2b26

diff --git a/vp8/encoder/ratectrl.c b/vp8/encoder/ratectrl.c
index 05dc09e..a501c3e 100644 (file)
--- a/vp8/encoder/ratectrl.c
+++ b/vp8/encoder/ratectrl.c
@@ -252,7 +252,8 @@ void vp8_setup_key_frame(VP8_COMP *cpi)
 void vp8_setup_inter_frame(VP8_COMP *cpi)
 {
 #if CONFIG_T8X8
-    if(cpi->common.Width * cpi->common.Height > 640*360)
+    if(cpi->common.Width * cpi->common.Height > 640*360
+        ||cpi->this_frame_target < 7 * cpi->common.MBs)
         cpi->common.txfm_mode = ALLOW_8X8;
     else
         cpi->common.txfm_mode = ONLY_4X4;