further phase 1

apps/LoopThroughWithOpenGLCompositing/videoio/VideoBackend.cpp

@@ -177,6 +177,31 @@ void VideoBackend::SetStatusMessage(const std::string& message)
 	mVideoIODevice->SetStatusMessage(message);
 }
 
+void VideoBackend::PublishStatus(bool externalKeyingConfigured, const std::string& statusMessage)
+{
+	if (!statusMessage.empty())
+		SetStatusMessage(statusMessage);
+
+	mHealthTelemetry.ReportVideoIOStatus(
+		"decklink",
+		OutputModelName(),
+		SupportsInternalKeying(),
+		SupportsExternalKeying(),
+		KeyerInterfaceAvailable(),
+		externalKeyingConfigured,
+		ExternalKeyingActive(),
+		StatusMessage());
+}
+
+void VideoBackend::ReportNoInputDeviceSignalStatus()
+{
+	mHealthTelemetry.ReportSignalStatus(
+		false,
+		InputFrameWidth(),
+		InputFrameHeight(),
+		InputDisplayModeName());
+}
+
 void VideoBackend::HandleInputFrame(const VideoIOFrame& frame)
 {
 	const VideoIOState& state = mVideoIODevice->State();

apps/LoopThroughWithOpenGLCompositing/videoio/VideoBackend.h

@@ -50,6 +50,8 @@ public:
 	bool ExternalKeyingActive() const;
 	const std::string& StatusMessage() const;
 	void SetStatusMessage(const std::string& message);
+	void PublishStatus(bool externalKeyingConfigured, const std::string& statusMessage = std::string());
+	void ReportNoInputDeviceSignalStatus();
 
 private:
 	void HandleInputFrame(const VideoIOFrame& frame);