Includes:
- fix signalling of fixed frame rates in encoder
- fix computation of frame rate in decoder
- fix access to SPS/VPS data for frame rate computation in decoder
- code clean up

- move VPS and related classes into VideoParameterSet.h/cpp
- move SPS and related classes into SequenceParameterSet.h/cpp
- move PPS and related classes into PictureParameterSet.h/cpp
- rename ProfileLevelTier.h/cpp to ProfileTierLevel.h/cpp and move ProfileTierLevel class there

No other changes except for minor formatting/comment cleanup

Avoid duplicating variables and functions for each reference list

Should also fix memory allocation issues with PicHeader.

Feature available as configuration parameter following !2320

Philip Cowan authored 2 years ago and Xiang Li committed 2 years ago

JVET-AA0054 Proposal 1: Signaling of external URI information in neural network post-filter characteristics SEI message