Phase 7

apps/LoopThroughWithOpenGLCompositing/videoio/VideoBackend.h

@@ -1,12 +1,18 @@
 #pragma once
 
+#include "RenderOutputQueue.h"
 #include "VideoBackendLifecycle.h"
 #include "VideoIOTypes.h"
+#include "VideoPlayoutPolicy.h"
 
 #include <chrono>
+#include <condition_variable>
 #include <cstdint>
+#include <deque>
 #include <memory>
+#include <mutex>
 #include <string>
+#include <thread>
 
 class HealthTelemetry;
 class OpenGLVideoIOBridge;
@@ -34,7 +40,7 @@ public:
 	bool BeginOutputFrame(VideoIOOutputFrame& frame);
 	void EndOutputFrame(VideoIOOutputFrame& frame);
 	bool ScheduleOutputFrame(const VideoIOOutputFrame& frame);
-	void AccountForCompletionResult(VideoIOCompletionResult result);
+	void AccountForCompletionResult(VideoIOCompletionResult result, uint64_t readyQueueDepth);
 
 	bool HasInputDevice() const;
 	bool HasInputSource() const;
@@ -59,6 +65,14 @@ public:
 private:
 	void HandleInputFrame(const VideoIOFrame& frame);
 	void HandleOutputFrameCompletion(const VideoIOCompletion& completion);
+	void StartOutputCompletionWorker();
+	void StopOutputCompletionWorker();
+	void OutputCompletionWorkerMain();
+	void ProcessOutputFrameCompletion(const VideoIOCompletion& completion);
+	bool FillReadyOutputQueue(const VideoIOCompletion& completion);
+	bool RenderReadyOutputFrame(const VideoIOState& state, const VideoIOCompletion& completion);
+	bool ScheduleReadyOutputFrame();
+	bool ScheduleBlackUnderrunFrame();
 	void RecordFramePacing(VideoIOCompletionResult completionResult);
 	bool ApplyLifecycleTransition(VideoBackendLifecycleState state, const std::string& message);
 	bool ApplyLifecycleFailure(const std::string& message);
@@ -74,8 +88,17 @@ private:
 	HealthTelemetry& mHealthTelemetry;
 	RuntimeEventDispatcher& mRuntimeEventDispatcher;
 	VideoBackendLifecycle mLifecycle;
+	VideoPlayoutPolicy mPlayoutPolicy;
+	RenderOutputQueue mReadyOutputQueue;
 	std::unique_ptr<VideoIODevice> mVideoIODevice;
 	std::unique_ptr<OpenGLVideoIOBridge> mBridge;
+	std::mutex mOutputCompletionMutex;
+	std::condition_variable mOutputCompletionCondition;
+	std::deque<VideoIOCompletion> mPendingOutputCompletions;
+	std::thread mOutputCompletionWorker;
+	bool mOutputCompletionWorkerRunning = false;
+	bool mOutputCompletionWorkerStopping = false;
+	uint64_t mNextReadyOutputFrameIndex = 0;
 	uint64_t mInputFrameIndex = 0;
 	uint64_t mOutputFrameScheduleIndex = 0;
 	uint64_t mOutputFrameCompletionIndex = 0;