tree 049ad49c51cdfdfa11d4c958c88797eddcb8e56f
parent 74ad25a4c6224b04cb85256ba0b81a5fc9b03041
author John Koleszar <jkoleszar@google.com> 1309362110 -0400
committer John Koleszar <jkoleszar@google.com> 1311004085 -0400

Improved 1-pass CBR rate control

This patch attempts to improve the handling of CBR streams with
respect to the short term buffering requirements. The "buffer level"
is changed to be an average over the rc buffer, rather than a long
running average. Overshoot is also tracked over the same interval
and the golden frame targets suppressed accordingly to correct for
overly aggressive boosting.

Testing shows that this is fairly consistently positive in one
metric or another -- some clips that show significant decreases
in quality have better buffering characteristics, others show
improvenents in both.

Change-Id: I924c89aa9bdb210271f2e03311e63de3f1f8f920