libcamera: control: Add vendor control id range reservation

Add a new control_ranges.yaml file that is used to reserve control id
ranges/offsets for libcamera and vendor specific controls. This file is
used by the gen-controls.py script to generate control id values for
each control.

Draft controls now have a separate range from core libcamera controls,
breaking the existing numbering behaviour.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

include/libcamera/meson.build

@@ -74,12 +74,13 @@ foreach mode, entry : controls_map
     endif
 
     template_file = files(outfile + '.in')
+    ranges_file = files('../../src/libcamera/control_ranges.yaml')
     control_headers += custom_target(header + '_h',
                                      input : input_files,
                                      output : outfile,
                                      command : [gen_controls, '-o', '@OUTPUT@',
                                                 '--mode', mode, '-t', template_file,
-                                                '@INPUT@'],
+                                                '-r', ranges_file, '@INPUT@'],
                                      install : true,
                                      install_dir : libcamera_headers_install_dir)
 endforeach