Phase 7.5 step 2

apps/LoopThroughWithOpenGLCompositing/videoio/OutputProductionController.h

@@ -0,0 +1,46 @@
+#pragma once
+
+#include "VideoPlayoutPolicy.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+
+enum class OutputProductionAction
+{
+	Produce,
+	Wait,
+	Throttle
+};
+
+struct OutputProductionPressure
+{
+	std::size_t readyQueueDepth = 0;
+	std::size_t readyQueueCapacity = 0;
+	uint64_t readyQueueUnderrunCount = 0;
+	uint64_t lateStreak = 0;
+	uint64_t dropStreak = 0;
+};
+
+struct OutputProductionDecision
+{
+	OutputProductionAction action = OutputProductionAction::Wait;
+	std::size_t requestedFrames = 0;
+	std::size_t targetReadyFrames = 0;
+	std::size_t maxReadyFrames = 0;
+	std::string reason;
+};
+
+class OutputProductionController
+{
+public:
+	explicit OutputProductionController(const VideoPlayoutPolicy& policy = VideoPlayoutPolicy());
+
+	void Configure(const VideoPlayoutPolicy& policy);
+	OutputProductionDecision Decide(const OutputProductionPressure& pressure) const;
+
+private:
+	VideoPlayoutPolicy mPolicy;
+};
+
+const char* OutputProductionActionName(OutputProductionAction action);