152 lines
4.4 KiB
C++
152 lines
4.4 KiB
C++
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <cstdint>
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#include <future>
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#include <type_traits>
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#include <utility>
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#include <android-base/thread_annotations.h>
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#include <android/gui/IDisplayEventConnection.h>
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#include <private/gui/BitTube.h>
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#include <utils/Looper.h>
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#include <utils/Timers.h>
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#include "EventThread.h"
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#include "TracedOrdinal.h"
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#include "VSyncDispatch.h"
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namespace android {
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struct ICompositor {
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virtual bool commit(nsecs_t frameTime, int64_t vsyncId, nsecs_t expectedVsyncTime) = 0;
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virtual void composite(nsecs_t frameTime, int64_t vsyncId) = 0;
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virtual void sample() = 0;
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protected:
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~ICompositor() = default;
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};
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template <typename F>
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class Task : public MessageHandler {
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template <typename G>
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friend auto makeTask(G&&);
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explicit Task(F&& f) : mTask(std::move(f)) {}
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void handleMessage(const Message&) override { mTask(); }
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using T = std::invoke_result_t<F>;
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std::packaged_task<T()> mTask;
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};
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template <typename F>
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inline auto makeTask(F&& f) {
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sp<Task<F>> task = new Task<F>(std::move(f));
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return std::make_pair(task, task->mTask.get_future());
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}
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class MessageQueue {
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public:
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virtual ~MessageQueue() = default;
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virtual void initVsync(scheduler::VSyncDispatch&, frametimeline::TokenManager&,
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std::chrono::nanoseconds workDuration) = 0;
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virtual void setDuration(std::chrono::nanoseconds workDuration) = 0;
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virtual void setInjector(sp<EventThreadConnection>) = 0;
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virtual void waitMessage() = 0;
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virtual void postMessage(sp<MessageHandler>&&) = 0;
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virtual void scheduleFrame() = 0;
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using Clock = std::chrono::steady_clock;
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virtual std::optional<Clock::time_point> getScheduledFrameTime() const = 0;
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};
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namespace impl {
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class MessageQueue : public android::MessageQueue {
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protected:
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class Handler : public MessageHandler {
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MessageQueue& mQueue;
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std::atomic_bool mFramePending = false;
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std::atomic<int64_t> mVsyncId = 0;
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std::atomic<nsecs_t> mExpectedVsyncTime = 0;
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public:
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explicit Handler(MessageQueue& queue) : mQueue(queue) {}
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void handleMessage(const Message& message) override;
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bool isFramePending() const;
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virtual void dispatchFrame(int64_t vsyncId, nsecs_t expectedVsyncTime);
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};
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friend class Handler;
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// For tests.
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MessageQueue(ICompositor&, sp<Handler>);
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void vsyncCallback(nsecs_t vsyncTime, nsecs_t targetWakeupTime, nsecs_t readyTime);
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private:
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ICompositor& mCompositor;
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const sp<Looper> mLooper;
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const sp<Handler> mHandler;
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struct Vsync {
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frametimeline::TokenManager* tokenManager = nullptr;
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std::unique_ptr<scheduler::VSyncCallbackRegistration> registration;
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mutable std::mutex mutex;
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TracedOrdinal<std::chrono::nanoseconds> workDuration
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GUARDED_BY(mutex) = {"VsyncWorkDuration-sf", std::chrono::nanoseconds(0)};
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std::chrono::nanoseconds lastCallbackTime GUARDED_BY(mutex) = std::chrono::nanoseconds{0};
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std::optional<nsecs_t> scheduledFrameTime GUARDED_BY(mutex);
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TracedOrdinal<int> value = {"VSYNC-sf", 0};
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};
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struct Injector {
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gui::BitTube tube;
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std::mutex mutex;
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sp<EventThreadConnection> connection GUARDED_BY(mutex);
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};
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Vsync mVsync;
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Injector mInjector;
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void injectorCallback();
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public:
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explicit MessageQueue(ICompositor&);
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void initVsync(scheduler::VSyncDispatch&, frametimeline::TokenManager&,
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std::chrono::nanoseconds workDuration) override;
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void setDuration(std::chrono::nanoseconds workDuration) override;
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void setInjector(sp<EventThreadConnection>) override;
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void waitMessage() override;
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void postMessage(sp<MessageHandler>&&) override;
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void scheduleFrame() override;
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std::optional<Clock::time_point> getScheduledFrameTime() const override;
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};
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} // namespace impl
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} // namespace android
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