Add improvements made in good-quality mode to real-time mode

Several improvements we made in good-quality mode can be added
into real-time mode to speed up encoding in speed 1, 2, and 3
with small quality loss. Tests using tulip clip showed:

--rt --cpu-used=-1
(before change)
PSNR: 38.028
time: 1m33.195s
(after change)
PSNR: 38.014
time: 1m20.851s

--rt --cpu-used=-2
(before change)
PSNR: 37.773
time: 0m57.650s
(after change)
PSNR: 37.759
time: 0m54.594s

--rt --cpu-used=-3
(before change)
PSNR: 37.392
time: 0m42.865s
(after change)
PSNR: 37.375
time: 0m41.949s

Change-Id: I76ab2a38d72bc5efc91f6fe20d332c472f6510c9

diff --git a/vp8/encoder/onyx_if.c b/vp8/encoder/onyx_if.c
index d2b0bf36aa2cba04455db7f927b1e0e157a9a583..85d63563a4ac2c2389ff8fec18f7b6dab76fb335 100644 (file)
--- a/vp8/encoder/onyx_if.c
+++ b/vp8/encoder/onyx_if.c
@@ -898,6 +898,10 @@ void vp8_set_speed_features(VP8_COMP *cpi)
 
             sf->improved_quant = 0;
             sf->improved_dct = 0;
+
+            sf->use_fastquant_for_pick = 1;
+            sf->no_skip_block4x4_search = 0;
+            sf->first_step = 1;
         }
 
         if (Speed > 1)