Made video_test working again.
Disabled VA-API Intel vaAssociateSubpicture workaround.
Fix bug: Must release lock for VideoPollEvent.
Allow faster video and audio sync.
Fix bug: Software decoder use vaPutImage with Intel backend.
Fix bug: Artefacts are shown after mpeg2 channel switch.
Fix bug: VideoReleaseSurface called after VideoExit.
Alsa + OSS can be included/build at the same time.
Alsa or OSS can be runtime selected with -a.
Add audio thread support to OSS module.
Add polled audio support to alsa module.
Removed some debug source code.
Pass PTS to video codec.
Flush audio buffer on channel change.
Sync audio + video stream.
Add workaround for Intel VA-API driver that forgets OSD position/size.