On 화, 2009-02-03 at 11:20 +0100, Laurent Pinchart wrote: > Hi Nate, > > On Thursday 29 January 2009, Dongsoo Kim wrote: > > Thank you. > > > > So if V4L2_CID_EXPOSURE is for Exposure Value control, I think there > > is no api for exposure metering. right? > > V4L2_CID_EXPOSURE controls the exposure time. This is often implemented > through a mechanical or electronic shutter in the device. > > What kind of exposure metering do you have in mind ? Can you give us some > details ? I mean photometry which is all about light meter (or exposure meter). Like spot metering, center weighted things.. > > > Actually many of APIs for camera are missing I guess. > > You're probably right. The V4L1/V4L2 API have been developed for frame > grabbers and extended to webcams. Now that high-end digital cameras get USB > connectivity, the V4L2 API should be extended with new controls. Feel free to > submit proposals for discussion on the linux-media mailing list. > Thank you for you encouraging words. Actually I'm working on some ISP devices from NEC, Fujitsu. and ARM SOC camera interface peripheral like PXA3, S3C64XX, OMAP3.. I wish I could make a device very close to a real digital camera. It wouldn't take so long until I submit a RFC about V4L2 API for digital camera :) (I hope so at least) Cheers. Regards, Nate -- 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
