remoting/protocol/video_writer.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // VideoWriter is a generic interface used by ConnectionToClient to
   6 // write into the video stream. ProtobufVideoWriter implements this
   7 // interface for protobuf video streams.
   8
   9 #ifndef REMOTING_PROTOCOL_VIDEO_WRITER_H_
  10 #define REMOTING_PROTOCOL_VIDEO_WRITER_H_
  11
  12 #include "base/basictypes.h"
  13 #include "base/callback.h"
  14 #include "remoting/protocol/video_stub.h"
  15
  16 namespace remoting {
  17 namespace protocol {
  18
  19 class Session;
  20 class SessionConfig;
  21
  22 class VideoWriter : public VideoStub {
  23  public:
  24   virtual ~VideoWriter();
  25
  26   // The callback is called when initialization is finished. The
  27   // parameter is set to true on success.
  28   typedef base::Callback<void(bool)> InitializedCallback;
  29
  30   static scoped_ptr<VideoWriter> Create(const SessionConfig& config);
  31
  32   // Initializes the writer.
  33   virtual void Init(Session* session, const InitializedCallback& callback) = 0;
  34
  35   // Stops writing. Must be called on the network thread before this
  36   // object is destroyed.
  37   virtual void Close() = 0;
  38
  39   // Returns true if the channel is connected.
  40   virtual bool is_connected() = 0;
  41
  42  protected:
  43   VideoWriter() { }
  44
  45  private:
  46   DISALLOW_COPY_AND_ASSIGN(VideoWriter);
  47 };
  48
  49 }  // namespace protocol
  50 }  // namespace remoting
  51
  52 #endif  // REMOTING_PROTOCOL_VIDEO_WRITER_H_