125 lines
2.8 KiB
C++
125 lines
2.8 KiB
C++
#pragma once
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#include "../frames/SystemFrameTypes.h"
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#include "DeckLinkOutput.h"
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#include "VideoIOTypes.h"
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#include <atomic>
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#include <chrono>
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#include <cstddef>
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#include <cstdint>
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#include <thread>
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namespace RenderCadenceCompositor
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{
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struct DeckLinkOutputThreadConfig
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{
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std::size_t targetBufferedFrames = 4;
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std::chrono::milliseconds idleSleep = std::chrono::milliseconds(1);
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};
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struct DeckLinkOutputThreadMetrics
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{
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uint64_t scheduledFrames = 0;
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uint64_t completedPollMisses = 0;
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uint64_t scheduleFailures = 0;
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};
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template <typename SystemFrameExchange>
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class DeckLinkOutputThread
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{
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public:
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DeckLinkOutputThread(DeckLinkOutput& output, SystemFrameExchange& exchange, DeckLinkOutputThreadConfig config = DeckLinkOutputThreadConfig()) :
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mOutput(output),
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mExchange(exchange),
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mConfig(config)
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{
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}
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DeckLinkOutputThread(const DeckLinkOutputThread&) = delete;
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DeckLinkOutputThread& operator=(const DeckLinkOutputThread&) = delete;
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~DeckLinkOutputThread()
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{
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Stop();
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}
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bool Start()
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{
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if (mRunning)
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return true;
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mStopping = false;
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mThread = std::thread([this]() { ThreadMain(); });
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mRunning = true;
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return true;
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}
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void Stop()
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{
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mStopping = true;
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if (mThread.joinable())
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mThread.join();
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mRunning = false;
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}
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DeckLinkOutputThreadMetrics Metrics() const
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{
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DeckLinkOutputThreadMetrics metrics;
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metrics.scheduledFrames = mScheduledFrames.load();
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metrics.completedPollMisses = mCompletedPollMisses.load();
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metrics.scheduleFailures = mScheduleFailures.load();
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return metrics;
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}
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private:
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void ThreadMain()
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{
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while (!mStopping)
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{
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const auto exchangeMetrics = mExchange.Metrics();
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if (exchangeMetrics.scheduledCount >= mConfig.targetBufferedFrames)
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{
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std::this_thread::sleep_for(mConfig.idleSleep);
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continue;
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}
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SystemFrame frame;
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if (!mExchange.ConsumeCompletedForSchedule(frame))
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{
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++mCompletedPollMisses;
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std::this_thread::sleep_for(mConfig.idleSleep);
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continue;
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}
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VideoIOOutputFrame outputFrame;
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outputFrame.bytes = frame.bytes;
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outputFrame.nativeBuffer = frame.bytes;
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outputFrame.rowBytes = frame.rowBytes;
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outputFrame.width = frame.width;
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outputFrame.height = frame.height;
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outputFrame.pixelFormat = frame.pixelFormat;
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if (!mOutput.ScheduleFrame(outputFrame))
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{
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++mScheduleFailures;
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mExchange.ReleaseScheduledByBytes(frame.bytes);
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std::this_thread::sleep_for(mConfig.idleSleep);
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continue;
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}
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++mScheduledFrames;
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}
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}
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DeckLinkOutput& mOutput;
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SystemFrameExchange& mExchange;
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DeckLinkOutputThreadConfig mConfig;
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std::thread mThread;
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std::atomic<bool> mStopping{ false };
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std::atomic<bool> mRunning{ false };
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std::atomic<uint64_t> mScheduledFrames{ 0 };
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std::atomic<uint64_t> mCompletedPollMisses{ 0 };
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std::atomic<uint64_t> mScheduleFailures{ 0 };
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};
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}
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