remove deprecated IMV mode SPS parameter

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 to 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.

No change except for SPS bits.

changed the description

Should the definition of ImvMode in Typedef.h also be removed?

I decide to leave it there for the moment. IBC needs some more refactoring and renaming (->AMVP) which is outside the scope of the SPS code removal. I'd hope people working on IBC may assist there.

I am still seeing things like if( imv == 2 )//IMV_4PEL in CABACWriter::mvd_coding. How do we make sure we're not missing these?

As far as I understand these are the actual mv resolutions. We still support full and 4 pel. The SPS mode switched between full pel only (config file mode 1) and combined full pel and 4 pel (config file mode 1).

I think the enum should be used exactly in these positions.

merged

mentioned in commit 1f970605

mentioned in merge request !300 (merged)