When decoder parses SEI message of unknown type,
it does not add it to list of SEIs.

But then try to access it by calling back() of the list of SEIs.

If list is empty decoder crashes.

Otherwise (if list is not empty) decoder gets wrong SEI message (one of previously added to the list)

Possible fix is to make xReadSEImessage() and parseSEImessage() report if new SEI message object was added to the list

add options --SourceScalingRatio to rescale source video

See merge request !2522

Move MergeCtx and related classes from ContextModelling to InterPrediction

See merge request !2533

JVET-AC0139: Unified merge function and updated cfg settings

See merge request !2518

Rename "LevelTier" to "TierLevel"

See merge request !2531

Ignore CLion files

See merge request !2530

Move parameter sets out of Slice.h/cpp

See merge request jvet/VVCSoftware_VTM!2517

Include additional build with high bit depth enabled

See merge request jvet/VVCSoftware_VTM!2529

Move initialisations to declaration for smaller PPS related classes. Define empty
constructors/destructors in header.

- manual reformatting:
  - try to shorten lines
  - keep blocks somewhat aligned
  - remove documentation comments
- make IBC flag bool
- add some braces
- add line breaks into longer functions
- move even longer functions into .cpp file
- move static variables and functions to the end

- 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

Add GCC 12 to build configuration

See merge request jvet/VVCSoftware_VTM!2528

Fix compilation when JVET_O0756_CALCULATE_HDRMETRICS is enabled

See merge request jvet/VVCSoftware_VTM!2527

Define AlfMode element that captures enable flag and filter index

See merge request jvet/VVCSoftware_VTM!2519

Having a single element reduces the number of data structures that
need to be maintained.

Rename m_tmpStorageLCU to m_tmpStorageCtu

See merge request !2520

StreamMergeApp: fix VPS allocation issue

See merge request jvet/VVCSoftware_VTM!2525

A pointer to a local VPS is passed as reference into the parameter set manager, which takes ownership of the object.
When the local scope is left, the memory will be freed, which can lead to use after free (and double free).

Adjust size of be a multiple of alignment when using std::aligned_alloc

See merge request !2524

Fixed an issue introduced in !2509

Update .clang-format file

See merge request !2523

Changes include:
- updates for newer clang-format versions
- Align across comments
- Set C++ version to C++17
- Don't split empty functions, etc.
- Left align reference and pointer operators
- Don't indent name spaces

Split ConstraintInfo class out of Slice.h/cpp

See merge request !2516

Remove use of 'using namespace std'

See merge request !2515