v4l2: v4l2_camera_proxy: Implement VIDIOC_G/S_PRIORITY

Implement VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY. The behaviour
documented in the V4L2 specification doesn't match the implementation in
the Linux kernel, implement the latter.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h
index 86c1a7df..8de306b4 100644
--- a/src/v4l2/v4l2_camera_proxy.h
+++ b/src/v4l2/v4l2_camera_proxy.h
@@ -43,6 +43,7 @@ private:
 	unsigned int calculateSizeImage(StreamConfiguration &streamConfig);
 	void querycap(std::shared_ptr<Camera> camera);
 	void tryFormat(struct v4l2_format *arg);
+	enum v4l2_priority maxPriority();
 	void updateBuffers();
 	void freeBuffers();
 
@@ -51,6 +52,8 @@ private:
 	int vidioc_g_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
 	int vidioc_s_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
 	int vidioc_try_fmt(V4L2CameraFile *file, struct v4l2_format *arg);
+	int vidioc_g_priority(V4L2CameraFile *file, enum v4l2_priority *arg);
+	int vidioc_s_priority(V4L2CameraFile *file, enum v4l2_priority *arg);
 	int vidioc_reqbufs(V4L2CameraFile *file, struct v4l2_requestbuffers *arg);
 	int vidioc_querybuf(V4L2CameraFile *file, struct v4l2_buffer *arg);
 	int vidioc_qbuf(V4L2CameraFile *file, struct v4l2_buffer *arg);
@@ -84,6 +87,8 @@ private:
 	std::vector<struct v4l2_buffer> buffers_;
 	std::map<void *, unsigned int> mmaps_;
 
+	std::set<V4L2CameraFile *> files_;
+
 	std::unique_ptr<V4L2Camera> vcam_;
 
 	/*