use MAX_NUM_CHANNEL_TYPE instead of MAX_NUM_COMPONENT - 1

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

  - Add picture header and related syntax changes.

- This merge request provides the implementation for JVET_O0299, i.e., Support for user defined Scaling List Matrics in the APS.

This reverts commit 8e16ada0.

Use vectors and resize them if needed instead of deleting and
reallocating memory for every picture. This appears to have a
significant impact on decoder run time.

Use PLTRunMode type where appropriate instead of bool since
using vector<bool> creates a number of issues

fix CHECK on cu mode, considering palette mode

1. indentation
2. function naming
3. Class declaration positions

Adopt JVET-O0070 method 4-2.1a