ore untangling

apps/LoopThroughWithOpenGLCompositing/videoio/VideoBackend.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "VideoIOTypes.h"
+
+#include <memory>
+#include <string>
+
+class HealthTelemetry;
+class OpenGLVideoIOBridge;
+class RenderEngine;
+class VideoIODevice;
+
+class VideoBackend
+{
+public:
+	VideoBackend(RenderEngine& renderEngine, HealthTelemetry& healthTelemetry);
+	~VideoBackend();
+
+	void ReleaseResources();
+	bool DiscoverDevicesAndModes(const VideoFormatSelection& videoModes, std::string& error);
+	bool SelectPreferredFormats(const VideoFormatSelection& videoModes, bool outputAlphaRequired, std::string& error);
+	bool ConfigureInput(const VideoFormat& inputVideoMode, std::string& error);
+	bool ConfigureOutput(const VideoFormat& outputVideoMode, bool externalKeyingEnabled, std::string& error);
+	bool Start();
+	bool Stop();
+
+	const VideoIOState& State() const;
+	VideoIOState& MutableState();
+	bool BeginOutputFrame(VideoIOOutputFrame& frame);
+	void EndOutputFrame(VideoIOOutputFrame& frame);
+	bool ScheduleOutputFrame(const VideoIOOutputFrame& frame);
+	void AccountForCompletionResult(VideoIOCompletionResult result);
+
+	bool HasInputDevice() const;
+	bool HasInputSource() const;
+	unsigned InputFrameWidth() const;
+	unsigned InputFrameHeight() const;
+	unsigned OutputFrameWidth() const;
+	unsigned OutputFrameHeight() const;
+	unsigned CaptureTextureWidth() const;
+	unsigned OutputPackTextureWidth() const;
+	VideoIOPixelFormat InputPixelFormat() const;
+	const std::string& InputDisplayModeName() const;
+	const std::string& OutputModelName() const;
+	bool SupportsInternalKeying() const;
+	bool SupportsExternalKeying() const;
+	bool KeyerInterfaceAvailable() const;
+	bool ExternalKeyingActive() const;
+	const std::string& StatusMessage() const;
+	void SetStatusMessage(const std::string& message);
+
+private:
+	std::unique_ptr<VideoIODevice> mVideoIODevice;
+	std::unique_ptr<OpenGLVideoIOBridge> mBridge;
+};