On 07/27/2014 11:32 PM, Nicolas Dufresne wrote: > Le dimanche 27 juillet 2014 à 20:21 +0200, Hans Verkuil a écrit : >> If cropcap returns -EINVAL then that means that the current input or >> output does >> not support cropping (for input) or composing (for output). In that case the >> pixel aspect ratio is undefined and you have no way to get hold of that information, >> which is a bug in the V4L2 API. >> >> In the case of an m2m device you can safely assume that whatever the pixel aspect >> is of the image you give to the m2m device, it will still be the same pixel >> aspect when you get it back. In fact, I would say that if an m2m device returns >> cropcap information, then the pixel aspect ratio information is most likely not >> applicable to the device and will typically be 1:1. >> >> Pixel aspect ratio is only relevant if the video comes in or goes out to a physical >> interface (sensor, video receiver/transmitter). > > So far "not applicable" has been interpreted as not implemented / > ENOTTY. Can't CODA just do that and we can close this subject ? Yes, that might be the best solution. Just call v4l2_disable_ioctl for CROPCAP and G/S_CROP, since none of them apply to the coda driver. Regards, Hans -- 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
