Remove unused parameters and remove default parameter values

This reduces the number of dynamic allocations

It cleans up old ISP code that is no longer used anymore. The code was used to allow only one ISP split depending on the block size. However, this functionality is not needed anymore after the adoption of JVET-N0308 during the Geneva Meeting in March, which limited the usage of ISP to CUs with a maximum size of 64x64 samples. This clean-up eliminates various unnecessary checks and improves the readability of the code.

JVET-O0219: LFNST transform set selection for a CCLM coded block. Remove duplicate code. Fix a bug due to convert MIP mode to convensional mode

JVET-O0219: LFNST transform set selection for a CCLM coded block. Remove duplicate code. Fix a bug due to convert MIP mode to convensional mode

Moonmo Koo authored 5 years ago and Frank Bossen committed 5 years ago

- Previous name: Reduced Secondary Transform (RST)
- The parameter, LFNST, should be added in cfg file for enabing LFNST, i.e. LFNST = 1

- getTrTypes function is moved to TrQuant class

- Implicit transform derivation
- DST-7 is applied horizontally/vertically as long as the number of (luma) samples are less than or equal to 16 in a row/column, otherwise DCT-2 is applied.