tree 682e05060226575aa5049dd8633d3935d6709120
parent 80a7af6450355256f88d1f12d9ecec224e56dda5
author Yunqing Wang <yunqingwang@google.com> 1566522948 -0700
committer Yunqing Wang <yunqingwang@google.com> 1566578363 +0000

Make prune_tx_type_using_stats feature work at speed 2

Use recorded tx type stats to prune following frame's
tx type search, and make this work at speed 2.
Borg test result:
         avg_psnr:   ovr_psnr:   ssim:   avg encoder speedup:
hdres:    0.094       0.099      0.052     4.4%
midres:   0.117       0.129      0.008     4.7%

Change-Id: I8c3e3b163535b12ed186f7d578185fe1f94855c8