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authorNicolas Dufresne <nicolas.dufresne@collabora.com>2020-01-24 13:27:04 -0500
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2020-03-07 01:57:45 +0200
commit2575b4916031d83bd777001c4b160e3a5c9008f9 (patch)
tree26757d782f1bc6c30dea74d716a7ea57a8cffb23 /test/v4l2_subdevice
parentbd0c2df110f502afe3c868309a1ca81ad6dc3196 (diff)
gst: libcamerasrc: Implement minimal caps negotiation
This is not expected to work in every possible cases, but should be sufficient as an initial implementation. What it does is that it turns the StreamFormats into caps and queries downstream caps with that as a filter. The result is the subset of caps that can be used. We then keep the first structure in that result and fixate using the default values found in StreamConfiguration as a default in case a range is available. We then validate this configuration and turn the potentially modified configuration into caps that we push downstream. Note that we trust the order in StreamFormats as being sorted best first, but this is not currently in libcamera. A todo has been added in the head of this file as a reminder to fix that in the core. Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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