Re: RFC: behavior of QUERYSTD when no signal is present

2013-04-12 Thread Hans Verkuil
Hi all, Some recent discussions regarding the correct behavior of QUERYSTD brought up a feeling of déjà vu. Some digging in my mail history resulted in this three year old RFC which I promised to implement but obviously I never did. Things have changed a bit. Today v4l_querystd in v4l2-ioctl.c

Re: RFC: behavior of QUERYSTD when no signal is present

2010-05-16 Thread Hans Verkuil
On Sunday 09 May 2010 11:23:05 Hans Verkuil wrote: What is VIDIOC_QUERYSTD supposed to do when there is no signal? The spec says this: The hardware may be able to detect the current video standard automatically. To do so, applications call VIDIOC_QUERYSTD with a pointer to a v4l2_std_id

RFC: behavior of QUERYSTD when no signal is present

2010-05-09 Thread Hans Verkuil
What is VIDIOC_QUERYSTD supposed to do when there is no signal? The spec says this: The hardware may be able to detect the current video standard automatically. To do so, applications call VIDIOC_QUERYSTD with a pointer to a v4l2_std_id type. The driver stores here a set of candidates, this can