libcamera: v4l2_videodevice: Track streaming state

Track the state of streamon/streamoff calls to simplify error paths.

Ensuring that streamOff() can be called on non-streaming streams
facilitates simpler error code paths, where a set of devices can all
call streamOff regardless of their initialisation state.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-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: Kieran Bingham <kieran.bingham@ideasonboard.com>

This commit is contained in:

Kieran Bingham

2021-01-12 10:21:39 +05:30

parent 5988661c90

commit c0bad607ce

2 changed files with 13 additions and 1 deletions

									
										include/libcamera/internal/v4l2_videodevice.h
									
		+2
		
												View File
												
				@@ -249,6 +249,8 @@ private:

					std::map<unsigned int, FrameBuffer *> queuedBuffers_;

					EventNotifier *fdBufferNotifier_;

					bool streaming_;

				};

				class V4L2M2MDevice