Hello,
This is a newbie question, but here we go...
I would like to know how I would go about programming a small embedded linux board (I was thinking a TI Divinci based board) for a video input (via HDMI or Component) and then output to a TV (via the same HDMI connection).
Along with the original video pass through, I would like to have an HTML frame at the bottom of the television screen.
Any help or a good reference for a starting point would be greatly appreciated!
The de facto non-X graphics library for Linux is DirectFB. I'm not sure how well it supports HDMI though.
On the TI DaVinci this is super simple.
The video driver and the video-backend support multiple overlays.
You'll stream your video to the lowest video surface, draw onto an overlay-surface (3 bit of alpha-blending is supported in hardware) and presto: The video output will contain the video-source and your overlay.
I don't know if grabbing a video signal from HDMI is supported though. Composite for sure is..
Btw: If you're looking for a graphic API with performance take a look at this product:
http://www.tesbv.com/index.php?option=com_content&task=view&id=42&Itemid=94
I've written the core graphic routines for it and I know that it blows DirectFB out of the water..