libcamera: controls: Generate and use fixed-sized Span types

Define Span types explicitly as either variable- or fixed-sized. This
introduces a new convention for defining Span dimensions in the property
and control value definitions and generates Span types as variable-sized
Span<T> or as fixed-sized Span<T,N>.

Signed-off-by: Christian Rauch <Rauch.Christian@gmx.de>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/control_ids.yaml

@@ -291,7 +291,7 @@ controls:
         transformation. The 3x3 matrix is stored in conventional reading
         order in an array of 9 floating point values.
 
-      size: [3x3]
+      size: [3,3]
 
   - ScalerCrop:
       type: Rectangle
@@ -525,7 +525,7 @@ controls:
         the window where the focal distance for the objects shown in that part
         of the image are closest to the camera.
 
-      size: [n]
+      size: []
 
   - AfTrigger:
       type: int32_t

src/libcamera/property_ids.yaml

@@ -497,7 +497,7 @@ controls:
 
   - PixelArrayOpticalBlackRectangles:
       type: Rectangle
-      size: [n]
+      size: []
       description: |
         The pixel array region(s) which contain optical black pixels
         considered valid for calibration purposes.
@@ -592,7 +592,7 @@ controls:
 
   - PixelArrayActiveAreas:
       type: Rectangle
-      size: [n]
+      size: []
       description: |
         The PixelArrayActiveAreas property defines the (possibly multiple and
         overlapping) portions of the camera sensor readable pixel matrix