Index: remoting/protocol/input_event_timestamps.h |
diff --git a/remoting/protocol/input_event_timestamps.h b/remoting/protocol/input_event_timestamps.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..52bca48bd48e74268c14adc95a9e0b7f0dacea3e |
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+++ b/remoting/protocol/input_event_timestamps.h |
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+// 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_ |