Hi, Sometime ago I developed an SOC based camera driver for my platform (ov7675 on iMX25), for the most part it seems to be working well however at the time I couldn't manage to change the frame size on the fly (without closing / re-opening the device).
The current problem I have is that my application needs to display a 320x240 preview image on screen, but to capture a static image at 640x480. I can do this as long as I close the device in between, unfortunately for power consumption reasons the camera device is put into a low power state whenever the device is released. This means that the image capture takes approx 1.5s (the requirement I have to meet is 1s). Now I could cheat and simply subsample (in software) the 640x480 image, but that puts additional burden on an already overworked MCU. Having been through the soc_camera and videobuf code and as far as I can tell this inability to change the frame size without closing the camera device appears to be a design decision. What I'm really after is confirmation one way of the other. If it's not, what is the correct process to achieve the frame change without closing the device. And if it is, does anybody have any suggestions of possible workarounds? Thanks Adam Plextek Limited Registered Address: London Road, Great Chesterford, Essex, CB10 1NY, UK Company Registration No. 2305889 VAT Registration No. GB 918 4425 15 Tel: +44 1799 533 200. Fax: +44 1799 533 201 Web:http://www.plextek.com Electronics Design and Consultancy -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
