JVET-AD0056 item 5:  don't signal nnpfc_input_pic_output_flag[i] flags when nnpfc_num_input_pics_minus1==0

See merge request jvet/VVCSoftware_VTM!2590

Rename and initialize m_RCCpbSaturationEnabled

See merge request jvet/VVCSoftware_VTM!2597

Rename df::program_options_lite as ProgramOptionsLite

See merge request jvet/VVCSoftware_VTM!2596

Fix output frame rate when using --MaxTemporalLayer in decoder

See merge request jvet/VVCSoftware_VTM!2591

Remove JVET_O0549_ENCODER_ONLY_FILTER_POL macro

See merge request jvet/VVCSoftware_VTM!2595

Replace EncAppCfg::OptionalValue with std::optional

See merge request jvet/VVCSoftware_VTM!2594

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

Code cleanup: fix variable names, use proper data types, etc.

See merge request jvet/VVCSoftware_VTM!2592

Avoid seg fault Slice::constructRefPicList

See merge request jvet/VVCSoftware_VTM!2593

When decoding a subset of temporal layers, it is possible that
inactive reference pictures may not be present in the DPB. In
such case a segmentation fault could be observed in
Slice::constructRefPicList. Marking of a picture as long term or
short term is changed to be skipped when a picture is missing.
An error is thrown when an active reference picture is missing.

JVET-AD0045: Encoder MV selections and DMVR revisited

See merge request jvet/VVCSoftware_VTM!2589

Fix #1597 nnpfc_constant_patch_size_flag and nnpfc_overlap and nnpfc_overlap parsing.

See merge request jvet/VVCSoftware_VTM!2586

Fix #1598: signal chroma location type when input is y4m

See merge request jvet/VVCSoftware_VTM!2588

JVET-AD0386: Processing Order SEI message update

See merge request jvet/VVCSoftware_VTM!2585

The default values of sps_chroma_horizontal_collocated_flag and
sps_chroma_vertical_collocated_flag are modified to take on values according to
the specified chroma location type. If no chroma location type is specified,
the default values of the flags are as prior to this commit.

Implementation of AD0056 item 5, don't signal nnpfc_input_pic_output_flag[i] flags when nnpfc_num_input_pics_minus1==0 and infer nnpfc_input_pic_output_flag[0]=1 instead

JVET-AD0169: Downsampling filters in range 1.1 to 1.35 based on Kaiser(7) windowed sinc

See merge request jvet/VVCSoftware_VTM!2583

Fix #1599: include frame rate info in bitstream when provided in y4m file

See merge request jvet/VVCSoftware_VTM!2587

Express frame rate as ratio of two integer values throughout code
using struct Fraction

Add support for defining fractional frame rate from command line

Remove previous cycle macros

See merge request jvet/VVCSoftware_VTM!2584