vd_lavc: separate opts to two structs and reorganize

The options in vd_lavc are all related, but they don't all require the same thing for runtime changes. To avoid having to manually add UPDATE_* to every single option flag, the options can be split into two separate structs. The vd_lavc_conf becomes a catch all for all the --vd-lavc options that require the full UPDATE_VD flag. The rest of the options are split off into the new hwdec_conf instead. Additionally, --vd-lavc-software-fallback is renamed to --hwdec-software-fallback and moved to the hwdec_conf as well. The new name better reflects what it does and it logically fits with those more. UPDATE_* flags are added on everything now so these should all now be changeable on runtime.

DUDudemanguy committed 1 year ago