AE: add streamsilence to gui settings for engines which suppport drain
ActiveAE: adjust to gui setting streamsilence
ActiveAE: fix inconsistent states for transcode
renderer: use fence for determination when a buffer is ready for reuse
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: some rework and documentation
vdpau: redesign
vdpau: make interop gl default and remove setting, rename and intvert interop yuv
vdpau: drop studio level conversion
vdpau: observe ffmpeg tags for color space
vdpau: switch off de-interlacing on ff
vdpau: fix mp4 part2 decoding, activate by default
vdpau: re-add limited range conversion
linuxrenderer: drop method RenderMultiPass
linuxrenderer: implement progressive weave for vdpau
VDPAU: silence compiler warnings
vdpau: release more resources on pre-cleanup
vdpau: set deinterlacing method to auto, if default method not supported
vdpau: fix deadlock if decoder is closed while refresh rate changes