libcamera: stream: Add stream configuration to the stream object

Add a cache of the active stream configuration to the stream object.
This cache is to be updated from the Camera object and can be accessed
read only from both the application and pipeline handlers.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/include/libcamera/stream.h b/include/libcamera/stream.h
index 111f2c93..3e8e83a2 100644
--- a/include/libcamera/stream.h
+++ b/include/libcamera/stream.h
@@ -11,23 +11,31 @@
 
 namespace libcamera {
 
+class Camera;
+
+struct StreamConfiguration {
+	unsigned int width;
+	unsigned int height;
+	unsigned int pixelFormat;
+
+	unsigned int bufferCount;
+};
+
 class Stream final
 {
 public:
 	Stream();
 	BufferPool &bufferPool() { return bufferPool_; }
+	const StreamConfiguration &configuration() const { return configuration_; }
 
 private:
+	friend Camera;
+
 	BufferPool bufferPool_;
+	StreamConfiguration configuration_;
 };
 
-struct StreamConfiguration {
-	unsigned int width;
-	unsigned int height;
-	unsigned int pixelFormat;
 
-	unsigned int bufferCount;
-};
 
 } /* namespace libcamera */