mash/mash-1/video video-v4l.cc

[Jose Maria Gonzalez <chema@bmrc.berkeley.edu>]

Update of /usr/mash/src/repository/mash/mash-1/video
In directory gumby.cs.berkeley.edu:/tmp/cvs-serv1631

Modified Files:
	video-v4l.cc 
Log Message:
Added the routines for conversion between the V4L-board 
frame-representations and the 4:2:0-type frames that 
the encoders like. This includes adding: 
	VideoCaptureV4l::planar422_to_planar420
	VideoCaptureV4l::packedYUYV422_to_planar420
	VideoCaptureV4l::packedUYVY422_to_planar420

Actually the 4:1:1 routines were doing 4:2:0, so 
I just changed their name and added correct versions 
of the 4:1:1. 

Also fixed the fact that when the encoder requests 
"CIF color-subsampling" it's usually H.261, which 
wants to do 4:2:0. Due to the former bug, it was 
working right. 

Also added some comments to the routines