libcamera: Add user Transform to CameraConfiguration

Add a field to the CameraConfiguration (including the necessary
documentation) to represent a 2D transform requested by the
application. All pipeline handlers are amended to coerce this to the
Identity, marking the configuration as "adjusted" if something
different had been requested.

Pipeline handlers that support Transforms can be amended subsequently.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/libcamera/camera.h b/include/libcamera/camera.h
index 272c12c3..a2ee4e7e 100644
--- a/include/libcamera/camera.h
+++ b/include/libcamera/camera.h
@@ -17,6 +17,7 @@
 #include <libcamera/request.h>
 #include <libcamera/signal.h>
 #include <libcamera/stream.h>
+#include <libcamera/transform.h>
 
 namespace libcamera {
 
@@ -61,6 +62,8 @@ public:
 	bool empty() const;
 	std::size_t size() const;
 
+	Transform transform;
+
 protected:
 	CameraConfiguration();