| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef REMOTING_PROTOCOL_INPUT_EVENT_TIMESTAMPS_H_ |
| #define REMOTING_PROTOCOL_INPUT_EVENT_TIMESTAMPS_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/time/time.h" |
| |
| namespace remoting { |
| namespace protocol { |
| |
| // Used on the host side to track timestamps for input events. |
| struct InputEventTimestamps { |
| // Client-side timestamps. This value comes from the client clock, so it |
| // should not be used for any calculations on the host side (except in tests). |
| base::TimeTicks client_timestamp; |
| |
| // Time when the event was processed by the host. |
| base::TimeTicks host_timestamp; |
| |
| bool is_null() { return client_timestamp.is_null(); } |
| }; |
| |
| // InputEventTimestampsSource is used by VideoStream implementations to get |
| // event timestamps that are sent back to the client as part of VideoStats |
| // message. |
| class InputEventTimestampsSource |
| : public base::RefCountedThreadSafe<InputEventTimestampsSource> { |
| public: |
| InputEventTimestampsSource() {} |
| |
| // Returns event timestamps for the input event that was received since the |
| // previous call. Null InputEventTimestamps value is returned if no input |
| // events were received. If multiple input events were received, then |
| // timestamps for the last one should be returned |
| virtual InputEventTimestamps TakeLastEventTimestamps() = 0; |
| |
| protected: |
| friend base::RefCountedThreadSafe<InputEventTimestampsSource>; |
| virtual ~InputEventTimestampsSource() {} |
| }; |
| |
| // Simple implementations of InputEventTimestampsSource that just stores the |
| // value provided to OnEventReceived(). |
| class InputEventTimestampsSourceImpl : public InputEventTimestampsSource { |
| public: |
| InputEventTimestampsSourceImpl(); |
| |
| void OnEventReceived(InputEventTimestamps timestamps); |
| |
| // InputEventTimestampsSource implementation. |
| InputEventTimestamps TakeLastEventTimestamps() override; |
| |
| protected: |
| ~InputEventTimestampsSourceImpl() override; |
| |
| private: |
| InputEventTimestamps last_timestamps_; |
| }; |
| |
| } // namespace protocol |
| } // namespace remoting |
| |
| #endif // REMOTING_PROTOCOL_INPUT_EVENT_TIMESTAMPS_H_ |