Speed-Up for ISP when JVET_M0464_UNI_MTS is enabled. It can be enabled/disabled with the config. file parameter ISPFast.

When enabled,
-it merges all full RD intra mode lists into one,
-it tests fewer non-DCT-II transforms if ISP is likely to become the best mode and
-it stops testing intra modes for an ISP split if all sub-partitions obtained a zero-cbf.

Results in CTC:

AI -> 0.04% loss, EncT = 97%, DecT = 100%
RA -> 0.01% loss, EncT = 99%, DecT = 100%

add M0451 the interoperability syntax update

See merge request !307

Fix ticket #185 on compilation error with JVET_M0140_SBT when JVET_M0464_UNI_MTS is disabled

See merge request !305

add clipping in chroma residue scaling to avoid potential overflow

See merge request !301

Refactor: move compositeRefEnabled out of SPS

See merge request !303

Fix ticket #153 on using uninitialized interDir and GBI array

See merge request !304

Fix ticket #153 on using uninitialized interDir and GBI array when MaxNumMergeCand=1 and MMVD uses the second merge candidate as base MV.

compositeRefEnabled is an encoder only option. It should not be stored in the SPS.
This commit is the last to remove unused parameters from SPSNext. Thus also
all comments related to SPSNext are removed.

Update initial CABAC states based on retraining

See merge request !299

Fix build

See merge request !300

Started failing after merging !294

Proposed fix for ticket 164, including TU/CU get fixes of merge request 249

See merge request !292

Fix of the size of extendRefList.

See merge request jvet/VVCSoftware_VTM!296

remove deprecated IMV mode SPS parameter

See merge request jvet/VVCSoftware_VTM!294

Clean-up of 2 parts in the ISP code that are redundant

See merge request !297

Clean-up of 2 parts in the ISP code that are redundant. The changes do not alter the performance in any way, i.e., the results are exactly the same.

1) In the full RD intra mode tests loop (estIntraPredLumaQT) there is the following condition:
    if ( uiOrgMode <= DC_IDX ) -> do X; else-> do X.
Since X is the same in both cases, the redundant code has been removed.

2) In xRecurIntraCodingLumaQT there is the threshold definition

double threshold = nSubPartitions == 2 ? 0.95 : subTuCounter == 0 ? 0.67 : subTuCounter == 1 ? 0.83 : 0.91;

Since subTuCounter can never be 0 (it is at least 1) at the time this expression is evaluated, the code has been simplified in the following way:

double threshold = nSubPartitions == 2 ? 0.95 : subTuCounter == 1 ? 0.83 : 0.91;

Remove reference to SPSNext to avoid compilation error

See merge request !295

Align ALF syntax element trace with specification

See merge request !293

AMVR (formely IMV) now has only one mode, which used to be mode #2
- remove SPS imv_mode parameter
- remove encoder configuration for mode #1 (mode #2 replaces mode #1)
- adapt config files to refer tp mode #1
- rename SPS syntax elements and access functions to AMVR

Note: IMV to AMVR renaming in other parts of the software should be done by proponents.

Ticket 149 fix

See merge request jvet/VVCSoftware_VTM!291

Merge branch 'ChromaBoundaryStrengthBugfix164' of https://vcgit.hhi.fraunhofer.de/misrak/VVCSoftware_VTM into ChromaBoundaryStrengthBugfix164

Fix for Ticket #152

See merge request jvet/VVCSoftware_VTM!285

  - Sub-PU TMVP can generate an invalid inter candidate.
  - Simplify previous solution and eliminate duplicated code.

Fix for ticket #168: Interaction between M0140 (SBT) and M0297 (MTS Zero Out)

See merge request !288

Fix #178 Avoid referencing encoder parameter in low level MC function

See merge request !290

Fix of the DQP signaling with multiple TUs (Ticket #181)

See merge request !280

When MC for luma only is desired, use existing luma/chroma parameters
instead of encoder-specific field in data structure

Also take care that luma only MC doesn't imply IBC