On 09/05/2013 11:10 PM, Ricardo Ribalda Delgado wrote:
Hello
Hi,
I am working porting a industrial camera driver to v4l. So far I have been able to describe most of the old functionality with v4l equivalents. The only thing that I am missing is multi cropping. The sensor (both a cmosis and a ccd chips) supports skipping lines from up to 8 regions. This increases the readout speed up to 50%, which is critical for the application. Unfortunately I have no way to describe multiple cropping areas in v4l. I am thinking about creating a new API/extending and old one for this. Any suggestion before I start? Have you faced also this problem? How did you solve it?
A similar issue has been raised during discussions on the camera auto focus rectangle selection API. While defining need selection targets [1] it was also proposed to convert one of the struct v4l2_selection reserved fields into an index field, which would indicate one rectangle of some set of rectangles supported by a driver. Then there could be a v4l2 bitmask control to determine which rectangles are currently valid/in use. Would something like this be relevant to your problem ?
I am planning to go to the Edinburgh mini summit, maybe we could add this to the agenda (if you consider that it is worth the time, of course)
It definitely sounds like a good topic to discuss at the mini summit, unless it gets resolved until then. ;-) [1] http://www.spinics.net/lists/linux-media/msg64499.html -- Regards, Sylwester -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
