id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	mlocked
2381	Add support for CoreVideo when displaying on Mac OS X	awk@…	Nigel	"The attached patch implements a VideoOut class using CoreVideo and OpenGL instead of QuickTime/QuickDraw. This is a more 'forward looking' approach to presenting video in Mac OS X.

Although at the moment it shows no particular performance advantage over the QuickTime approach (since QT uses ostensibly the same code path to do the actual drawing) this code should offer more future enhancements. For example CoreImage filters can now be run on the video stream and the OSD display could in the future be composited onto the display in RGB space rather than the YUV conversion that is currently performed to draw the OSD 'in line' with the video image.

This patch seems to work well for me - even in it's currently limited state however it needs additional work to implement PIP support. I'm also planning on updating the current 'usleep/busy wait' timing method to use the CoreVideo display link mechanism to provide notifications as to when to draw the next frame.

I can't yet see any evidence of anyone else implementing YUV420(YCbCr420) -> YUV422(YCbCr422) CoreImage filters or a CoreImage deinterlace filter but it's certainly possible such items could appear in the future. Doing the colorspace conversion entirely on the card would definately yield some further performance improvements.

Note that videoout_corevideo doesn't implement any of the 'cute' features of videoout_quartz such as video in the dock or in a transparent window - those settings are ignored."	patch	closed	minor	unknown	Ports - OSX	head	medium	fixed			0