JVET-P1019: Output layer set

- Prevent use of clipMv( ) on decoder side when wraparound is enabled.

Brian Heng authored 5 years ago and Karsten Suehring committed 5 years ago

  - Add picture header and related syntax changes.

fix chroma scaling window offset, and replace CclmCollocatedChroma with VerCollocatedChroma in classH1.cfg

1. enabling the encoder-side RD check of ISP mode when ACT is disabled at CU level
2. ACT intra RD code clean-up

  - Code cleanup.

  - Fix multiplication overflow in scaled MV position.

  - Disable clipping of unscaled RPR motion vectors.

  - Disable sub-PU grouping optimization with RPR.