Organisation

apps/LoopThroughWithOpenGLCompositing/gl/threading/RenderCommandQueue.h

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+#pragma once
+
+#include "VideoIOTypes.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <deque>
+#include <mutex>
+#include <vector>
+
+enum class RenderCommandResetScope
+{
+	None,
+	ShaderFeedbackOnly,
+	TemporalHistoryOnly,
+	TemporalHistoryAndFeedback
+};
+
+struct RenderPreviewPresentRequest
+{
+	unsigned outputFrameWidth = 0;
+	unsigned outputFrameHeight = 0;
+};
+
+struct RenderScreenshotCaptureRequest
+{
+	unsigned width = 0;
+	unsigned height = 0;
+};
+
+struct RenderInputUploadRequest
+{
+	VideoIOFrame inputFrame;
+	VideoIOState videoState;
+	std::vector<unsigned char> ownedBytes;
+};
+
+struct RenderOutputFrameRequest
+{
+	VideoIOState videoState;
+	VideoIOCompletion completion;
+};
+
+struct RenderCommandQueueMetrics
+{
+	std::size_t depth = 0;
+	uint64_t enqueuedCount = 0;
+	uint64_t coalescedCount = 0;
+};
+
+class RenderCommandQueue
+{
+public:
+	void RequestPreviewPresent(const RenderPreviewPresentRequest& request);
+	bool TryTakePreviewPresent(RenderPreviewPresentRequest& request);
+
+	void RequestScreenshotCapture(const RenderScreenshotCaptureRequest& request);
+	bool TryTakeScreenshotCapture(RenderScreenshotCaptureRequest& request);
+
+	void RequestInputUpload(const RenderInputUploadRequest& request);
+	bool TryTakeInputUpload(RenderInputUploadRequest& request);
+
+	void RequestOutputFrame(const RenderOutputFrameRequest& request);
+	bool TryTakeOutputFrame(RenderOutputFrameRequest& request);
+
+	void RequestRenderReset(RenderCommandResetScope scope);
+	bool TryTakeRenderReset(RenderCommandResetScope& scope);
+
+	RenderCommandQueueMetrics GetMetrics() const;
+
+private:
+	static RenderCommandResetScope MergeResetScopes(RenderCommandResetScope current, RenderCommandResetScope requested);
+
+	mutable std::mutex mMutex;
+	bool mHasPreviewPresentRequest = false;
+	RenderPreviewPresentRequest mPreviewPresentRequest;
+	bool mHasScreenshotCaptureRequest = false;
+	RenderScreenshotCaptureRequest mScreenshotCaptureRequest;
+	bool mHasInputUploadRequest = false;
+	RenderInputUploadRequest mInputUploadRequest;
+	std::deque<RenderOutputFrameRequest> mOutputFrameRequests;
+	RenderCommandResetScope mRenderResetScope = RenderCommandResetScope::None;
+	uint64_t mEnqueuedCount = 0;
+	uint64_t mCoalescedCount = 0;
+};