Am Montag, den 28.07.2014, 00:22 +0200 schrieb Hans Verkuil: > 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. Sounds like a plan, I'll do that. thanks Philipp -- 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
