Add VideoReader and VideoWriter interfaces.

remoting/protocol/video_reader.cc

+// Copyright (c) 2010 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.
+
+#include "remoting/protocol/video_reader.h"
+
+#include "remoting/protocol/chromotocol_config.h"
+#include "remoting/protocol/protobuf_video_reader.h"
+#include "remoting/protocol/rtp_video_reader.h"
+
+namespace remoting {
+
+VideoReader::~VideoReader() { }
+
+// static
+VideoReader* VideoReader::Create(const ChromotocolConfig* config) {
+  const ChannelConfig& video_config = config->video_config();
+  if (video_config.transport == ChannelConfig::TRANSPORT_SRTP) {
+    return new RtpVideoReader();
+  } else if (video_config.transport == ChannelConfig::TRANSPORT_STREAM) {
+    return new ProtobufVideoReader();
+  }
+  return NULL;
+}
+
+}  // namespace remoting