dxva: fix c/p error after b92d51f9fc3ad40da13aa0c153a13e278937ecee
dxva: temp fix for borked video surface handling
pvr: avoid closing stream players on channel switch
fix unregiser of observer/observable
Merge pull request #5347 from FernetMenta/observer

fix unregiser of observer/observable
Merge pull request #5342 from FernetMenta/switch

pvr: avoid closing stream players on channel switch
Merge pull request #5346 from FernetMenta/dxva

DXVA: fixes related to ffmpeg 2nd.
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
renderer: bump buffers to 5
videoplayer: update frametime, it might change due to fps detection
videoplayer: give streams with invalid fps a chance for fps detection
dvdplayer: allow rewinding at end of stream, do a seek after rewind
dvdplayer: observe pts counter overflow
dvdplayer: avoid short screen flicker caused by unnecessary reconfigure of renderer
vdpau: advanced settings for auto deinterlacing
player: fix rewind
OMXPlayer: some caching fixes for pvr
fix incorrect display of fps when dr kicks in
ActiveAE: slightly reduce buffer size