Add VideoStream interface.

remoting/protocol/video_stream.h

+// Copyright 2015 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_VIDEO_STREAM_H_
+#define REMOTING_PROTOCOL_VIDEO_STREAM_H_
+
+#include "base/callback_forward.h"
+
+namespace webrtc {
+class DesktopSize;
+}  // namespace webrtc
+
+namespace remoting {
+namespace protocol {
+
+class VideoStream {
+ public:
+  // Callback used to notify about screen size changes.
+  typedef base::Callback<void(const webrtc::DesktopSize& size)> SizeCallback;
+
+  VideoStream() {}
+  virtual ~VideoStream() {}
+
+  // Pauses or resumes scheduling of frame captures. Pausing/resuming captures
+  // only affects capture scheduling and does not stop/start the capturer.
+  virtual void Pause(bool pause) = 0;
+
+  // Should be called whenever an input event is received.
+  virtual void OnInputEventReceived(int64_t event_timestamp) = 0;
+
+  // Sets whether the video encoder should be requested to encode losslessly,
+  // or to use a lossless color space (typically requiring higher bandwidth).
+  virtual void SetLosslessEncode(bool want_lossless) = 0;
+  virtual void SetLosslessColor(bool want_lossless) = 0;
+
+  // Sets SizeCallback to be called when screen size is changed.
+  virtual void SetSizeCallback(const SizeCallback& size_callback) = 0;
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_VIDEO_STREAM_H_