vikas arora ab5ea217f7 Tune Lossless encoder
- Changed the dynamic range where more aggressive
  (BackwardReferencesTraceBackward) heuristic is run from quality > 10
  (instead of quality > 25).
- Limit the backward-ref Window size to 16*width & 256*width for lower
  qualities ([0, 25[ & [25, 50[) respectively, instead of 1M window.
- Evaluate the params for HashChainFindCopy outside this function call
  and pass it, instead of recomputing them for every call.

Change-Id: If9eedfc14b978e7632d7cf69c96186e2910b0554
2012-10-30 17:30:17 -07:00
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