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fix some JCCR related indentation, encapsulation, and descriptive text, add --PYUV to software manual

This should implement the following from the meeting notes:

For CTC, it was initially agreed to use the new syntax to achieve
the chroma QP settings proposed in O0186 for SDR, N0221 for PQ,
O0433 for HLG. For the joint table, use the average of the Cb and Cr
tables. Below QP = 16, chroma and luma QP should be equal for CEs
using low QP.

Decision (CTC): This was further discussed in the closing plenary
on Friday. It was suggested to keep the anchor QP settings for PQ
and HLG as in CTC of prior meeting cycle. For SDR, see above.
Below QP = 16, chroma and luma QP should be equal for CEs using low
QP.

Add PROF support in encoder_lowdelay_P_vtm.cfg

Add a cfg option "FastIntraPass", and use it for turning on/off the fast algorithm of intra pass coding in RDO. In cfg files, the parameter FastIntraPass is set as 0 for RA and 1 for LDB/LDP.

Adopt JVET-O0070 method 4-2.1a

Has zero impact on the bitstream, because the encoder sets the slice type to P, if list 1 is empty.

Hendry authored Jun 26, 2019 and Karsten Suehring committed Jun 26, 2019

update the nonCTC cfg files

Hendry authored Jun 18, 2019 and Karsten Suehring committed Jun 18, 2019

- Fix the entry points
- Put some validation for rectangular slice
- Bug fix for N0124 signalling for number of bits to signal bottomrightidx

Moonmo Koo authored Apr 26, 2019 and Frank Bossen committed Apr 26, 2019

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

Added 'FastMIP' encoder config parameter, removed condition on intra period and picture height in IntraSearch.cpp.

- also adds documentation for ReWriteParamSets parameter

#define JVET_N0127_MMVD_SPS_FLAG                          1

MMVD simplification by removing the two largest distance entries in the
MMVD distance table using encoder only change method.
To make the number of MMVD distance entries configurable by the
software, additionally adding 'MmvdDisNum' as a new option in the cfg files.

- add new cache model
- fix the order of initilization in DecLib.cpp

keep max TU in #define for possibility of keeping the parameter

TU max/min size are constants in the VVC draft. Reflecting this in the software.

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%

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.