[media] media: Add video statistics computation functions

The video statistics function describes entities such as video histogram
engines or 3A statistics engines.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/Documentation/DocBook/media/v4l/media-types.xml b/Documentation/DocBook/media/v4l/media-types.xml
index 60fe841f8846..95aa1f9c836a 100644
--- a/Documentation/DocBook/media/v4l/media-types.xml
+++ b/Documentation/DocBook/media/v4l/media-types.xml
@@ -176,6 +176,15 @@
                    skipping are considered as scaling.
             </entry>
           </row>
+          <row>
+            <entry><constant>MEDIA_ENT_F_PROC_VIDEO_STATISTICS</constant></entry>
+            <entry>Video statistics computation (histogram, 3A, ...). An entity
+                   capable of statistics computation must have one sink pad and
+                   one source pad. It computes statistics over the frames
+                   received on its sink pad and outputs the statistics data on
+                   its source pad.
+            </entry>
+          </row>
         </tbody>
       </tgroup>
     </table>