android: camera_stream: Delegate Encoder construction

Delegate the construction of the encoder to the CameraStream class
for streams that need post-processing.

Reviewed-by: Umang Jain <email@uajain.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/android/camera_stream.h

@@ -100,7 +100,7 @@ public:
 		Mapped,
 	};
 	CameraStream(libcamera::PixelFormat format, libcamera::Size size,
-		     Type type, unsigned int index, Encoder *encoder = nullptr);
+		     Type type, unsigned int index);
 
 	const libcamera::PixelFormat &format() const { return format_; }
 	const libcamera::Size &size() const { return size_; }
@@ -108,6 +108,8 @@ public:
 	unsigned int index() const { return index_; }
 	Encoder *encoder() const { return encoder_.get(); }
 
+	int configure(const libcamera::StreamConfiguration &cfg);
+
 private:
 	libcamera::PixelFormat format_;
 	libcamera::Size size_;