make video/x-bayer a first class gstreamer citizen

[Philippe De Muyter]

Hi all,

I am currently trying to extend an exisiting plugin which accepts
a big set of color formats on his sink to also accept Bayer-encoded
images produced by a sensor.  Everything is utterly complicated
because video/x-bayer is not treated equally to video/x-raw, while
it is basically the same, with constant-sized frames.

Problems are e.g, 
gst_video_info_from_caps does not fill the size field of the info struct,
leading to a cryptic 

(gst-launch-1.0:26159): GStreamer-CRITICAL **:
	gst_query_add_allocation_pool: assertion 'size != 0' failed

or
there is no GST_VIDEO_FORMAT_* constant for Bayer images, and
gst_video_format_to_string can thus not be used with Bayer formats

Could video/x-bayer,format=bggr be replaced by video/x-raw,format=bggr
 (or BGGR) ?

v4l2 does not do that distinction, and actually some sensors come with
the same electronic part, changing only the color filter between a GREY
sensor and a Bayer sensor

Best regards

Philippe

-- 
Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles