libcamera: v4l2_videodevice: Use bufferType_ in [get|try|set]Format()

V4L2VideoDevice is using the caps to determine which kind of buffers to
use with the video-device in 2 different cases:

1. V4L2VideoDevice::open()
2. V4L2VideoDevice::[get|try|set]Format()

And the order in which the caps are checked is different between
these 2 cases. This is a problem for /dev/video# nodes which support
both video-capture and metadata buffers. open() sets bufferType_ to
V4L2_BUF_TYPE_VIDEO_CAPTURE[_MPLANE] in this case, where as
[get|try|set]Format() will call [get|set]FormatMeta() which does not
work with V4L2_BUF_TYPE_VIDEO_CAPTURE[_MPLANE] buffers.

Switch [get|try|set]Format() to use the bufferType_ to determine on what
sort of buffers they should be operating, leaving the V4L2VideoDevice
code with only a single place where the decision is made what sort
of buffers it should operate on for a specific /dev/video# node.

This will also allow to modify open() in the future to take a bufferType
argument to allow overriding the default bufferType it selects for
/dev/video# nodes which are capable of supporting more then 1 buffer type.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions