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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _UI_INPUT_INPUTDISPATCHER_INPUTEVENTTIMELINE_H
#define _UI_INPUT_INPUTDISPATCHER_INPUTEVENTTIMELINE_H
#include <binder/IBinder.h>
#include <input/Input.h>
#include <unordered_map>
namespace android {
namespace inputdispatcher {
/**
* Describes the input event timeline for each connection.
* An event with the same inputEventId can go to more than 1 connection simultaneously.
* For each connection that the input event goes to, there will be a separate ConnectionTimeline
* created.
* To create a complete ConnectionTimeline, we must receive two calls:
* 1) setDispatchTimeline
* 2) setGraphicsTimeline
*
* In a typical scenario, the dispatch timeline is known first. Later, if a frame is produced, the
* graphics timeline is available.
*/
struct ConnectionTimeline {
// DispatchTimeline
nsecs_t deliveryTime; // time at which the event was sent to the receiver
nsecs_t consumeTime; // time at which the receiver read the event
nsecs_t finishTime; // time at which the finish event was received
// GraphicsTimeline
std::array<nsecs_t, GraphicsTimeline::SIZE> graphicsTimeline;
ConnectionTimeline(nsecs_t deliveryTime, nsecs_t consumeTime, nsecs_t finishTime);
ConnectionTimeline(std::array<nsecs_t, GraphicsTimeline::SIZE> graphicsTimeline);
/**
* True if all contained timestamps are valid, false otherwise.
*/
bool isComplete() const;
/**
* Set the dispatching-related times. Return true if the operation succeeded, false if the
* dispatching times have already been set. If this function returns false, it likely indicates
* an error from the app side.
*/
bool setDispatchTimeline(nsecs_t deliveryTime, nsecs_t consumeTime, nsecs_t finishTime);
/**
* Set the graphics-related times. Return true if the operation succeeded, false if the
* graphics times have already been set. If this function returns false, it likely indicates
* an error from the app side.
*/
bool setGraphicsTimeline(std::array<nsecs_t, GraphicsTimeline::SIZE> graphicsTimeline);
inline bool operator==(const ConnectionTimeline& rhs) const;
inline bool operator!=(const ConnectionTimeline& rhs) const;
private:
bool mHasDispatchTimeline = false;
bool mHasGraphicsTimeline = false;
};
struct InputEventTimeline {
InputEventTimeline(bool isDown, nsecs_t eventTime, nsecs_t readTime);
const bool isDown; // True if this is an ACTION_DOWN event
const nsecs_t eventTime;
const nsecs_t readTime;
struct IBinderHash {
std::size_t operator()(const sp<IBinder>& b) const {
return std::hash<IBinder*>{}(b.get());
}
};
std::unordered_map<sp<IBinder>, ConnectionTimeline, IBinderHash> connectionTimelines;
bool operator==(const InputEventTimeline& rhs) const;
};
class InputEventTimelineProcessor {
protected:
InputEventTimelineProcessor() {}
virtual ~InputEventTimelineProcessor() {}
public:
/**
* Process the provided timeline
*/
virtual void processTimeline(const InputEventTimeline& timeline) = 0;
};
} // namespace inputdispatcher
} // namespace android
#endif // _UI_INPUT_INPUTDISPATCHER_INPUTEVENTTIMELINE_H
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