On 08/30/2013 03:01 PM, Hans Verkuil wrote: > OK, I know, we don't even know yet when the mini-summit will be held but I thought > I'd just start this thread to collect input for the agenda. > > I have these topics (and I *know* that I am forgetting a few): > > - Discuss ideas/use-cases for a property-based API. An initial discussion > appeared in this thread: > > http://permalink.gmane.org/gmane.linux.drivers.video-input-infrastructure/65195 > > - What is needed to share i2c video transmitters between drm and v4l? Hopefully > we will know more after the upcoming LPC. > > - Decide on how v4l2 support libraries should be organized. There is code for > handling raw-to-sliced VBI decoding, ALSA looping, finding associated > video/alsa nodes and for TV frequency tables. We should decide how that should > be organized into libraries and how they should be documented. The first two > aren't libraries at the moment, but I think they should be. The last two are > libraries but they aren't installed. Some work is also being done on an improved > version of the 'associating nodes' library that uses the MC if available. > > - Define the interaction between selection API, ENUM_FRAMESIZES and S_FMT. See > this thread for all the nasty details: > > http://www.spinics.net/lists/linux-media/msg65137.html > > Feel free to add suggestions to this list. I got another one: VIDIOC_TRY_FMT shouldn't return -EINVAL when an unsupported pixelformat is provided, but in practice video capture board tend to do that, while webcam drivers tend to map it silently to a valid pixelformat. Some applications rely on the -EINVAL error code. We need to decide how to adjust the spec. I propose to just say that some drivers will map it silently and others will return -EINVAL and that you don't know what a driver will do. Also specify that an unsupported pixelformat is the only reason why TRY_FMT might return -EINVAL. Alternatively we might want to specify explicitly that EINVAL should be returned for video capture devices (i.e. devices supporting S_STD or S_DV_TIMINGS) and 0 for all others. 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
