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

initial commit of JVET_O0119_BASE_PALETTE_444: palette in HEVC and palette mode coding in JVET-N0258

Note: in VVC draft 6 "–	If intra_bdpcm_flag[ ][ ] is equal to 1, ctxInc is set equal to 1.", which was set equal to 4 in VTM5. This integration also implements this change, to align cbf ctx with VVC draft 6.

- LNFST is applied only on top of DCT-2

1. moving the cbf signaling from transform_tree() to transform_unit()
2. using transform depth 1 for coding chroma cbfs for CUs with SBT; solving the s/w bug reported in ticket #338

Remy Foray authored 5 years ago and Frank Bossen committed 5 years ago

Add the missing condition on MaxNumTriangleMergeCand to derive MergeTriangleFlag

As reported in ticket #291, when sig_flag is inferred, the variables
m_tmplCpDiag and m_tmplCpSum1 are not set correctly, but used for
deriving the contexts for par_glag, gt1_flag, and gt3_flag.

The provided modification fixes this issue by calling cctx.sigCtxIdAbs()
also when sig_flag is inferred (except for the last scanning position,
where a different mechanism is used).

There is no impact on coding efficiency.

implements:
- splitting tiles into bricks
- raster-scan tiles
- uniform and non-uniform splits
- all tiles/bricks in one slice
- each brick one slice
- PPS syntax

missing:
- rectangular tiles
- slice header syntax

further todo:
- rework slice mode 2 to use multiple tiles for byte size matching
- lots of renaming (tile->brick)