Added files for audio writers.

remoting/protocol/audio_writer.h

+// Copyright (c) 2012 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_AUDIO_WRITER_H_
+#define REMOTING_PROTOCOL_AUDIO_WRITER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "remoting/protocol/audio_stub.h"
+#include "remoting/protocol/buffered_socket_writer.h"
+
+namespace net {
+class StreamSocket;
+}  // namespace net
+
+namespace remoting {
+namespace protocol {
+
+class Session;
+class SessionConfig;
+
+class AudioWriter : public AudioStub {
+ public:
+  virtual ~AudioWriter();
+
+  // The callback is called when initialization is finished. The
+  // parameter is set to true on success.
+  typedef base::Callback<void(bool)> InitializedCallback;
+
+  static AudioWriter* Create(const SessionConfig& config);
+
+  // Initializes the writer.
+  void Init(Session* session, const InitializedCallback& callback);
+
+  // Stops writing. Must be called on the network thread before this
+  // object is destroyed.
+  void Close();
+
+  // Returns true if the channel is connected.
+  bool is_connected();
+
+  // AudioStub interface.
+  virtual void ProcessAudioPacket(scoped_ptr<AudioPacket> packet,
+                                  const base::Closure& done) OVERRIDE;
+
+ private:
+  AudioWriter();
+
+  void OnChannelReady(scoped_ptr<net::StreamSocket> socket);
+
+  Session* session_;
+
+  InitializedCallback initialized_callback_;
+
+  // TODO(sergeyu): Remove |channel_| and let |buffered_writer_| own it.
+  scoped_ptr<net::StreamSocket> channel_;
+
+  BufferedSocketWriter buffered_writer_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioWriter);
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_AUDIO_WRITER_H_