[common] (frame generators) add CameraFrameGenerator class, as child of CV2FrameGeneratorABC

common/polystar/common/frame_generators/camera_frame_generator.py

+from dataclasses import dataclass
+from typing import Any, Iterable
+
+import cv2
+
+from polystar.common.frame_generators.cv2_frame_generator_abc import CV2FrameGeneratorABC
+
+
+@dataclass
+class CameraFrameGenerator(CV2FrameGeneratorABC):
+    width: int
+    height: int
+
+    def _capture_params(self) -> Iterable[Any]:
+        return (
+            "nvarguscamerasrc ! "
+            "video/x-raw(memory:NVMM), "
+            f"width=(int){self.width}, height=(int){self.height}, "
+            "format=(string)NV12, framerate=(fraction)60/1 ! "
+            "nvvidconv flip-method=0 ! "
+            f"video/x-raw, width=(int){self.width}, height=(int){self.height}, "
+            "format=(string)BGRx ! "
+            "videoconvert ! appsink",
+            cv2.CAP_GSTREAMER,
+        )