[Chromecast] Add CmaMediaRendererFactory and IPC proxy components

chromecast/renderer/media/media_channel_proxy.h

+// Copyright 2014 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 CHROMECAST_RENDERER_MEDIA_MEDIA_CHANNEL_PROXY_H_
+#define CHROMECAST_RENDERER_MEDIA_MEDIA_CHANNEL_PROXY_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "chromecast/media/cma/pipeline/load_type.h"
+#include "chromecast/renderer/media/cma_message_filter_proxy.h"
+
+namespace IPC {
+class Message;
+}
+
+namespace chromecast {
+namespace cma {

[gunsch, 2014/12/20 22:41:34]

chromecast::media

[erickung1, 2014/12/21 11:10:47]

Done.

+
+// MediaChannelProxy - Manage the lifetime of a CMA ipc channel.
+// Must be invoked from the IO thread of the renderer process.
+//

[gunsch, 2014/12/20 22:41:34]

remove line

[erickung1, 2014/12/21 11:10:47]

Done.

+class MediaChannelProxy
+    : public base::RefCountedThreadSafe<MediaChannelProxy> {
+ public:
+  MediaChannelProxy();
+
+  // Open a CMA ipc channel.
+  void Open(chromecast::media::LoadType load_type);
+
+  // Close the ipc channel.
+  void Close();
+
+  // Return the ID of the CMA ipc channel.
+  // Return a null or negative ID if no channel has been opened.

[gunsch, 2014/12/20 22:41:34]

can't return null, it's an int

also, from the code, looks like "0" is the value for if the channel is not
opened

[erickung1, 2014/12/21 11:10:47]

Done.

+  int GetId() { return id_; }
+
+  // Manage delegates.
+  bool SetMediaDelegate(
+      const CmaMessageFilterProxy::MediaDelegate& media_delegate);
+  bool SetAudioDelegate(
+      const CmaMessageFilterProxy::AudioDelegate& audio_delegate);
+  bool SetVideoDelegate(
+      const CmaMessageFilterProxy::VideoDelegate& video_delegate);
+
+  // Send an IPC message over this CMA ipc channel.
+  bool Send(scoped_ptr<IPC::Message> message);
+
+ private:
+  friend class base::RefCountedThreadSafe<MediaChannelProxy>;
+  virtual ~MediaChannelProxy();

[gunsch, 2014/12/20 22:41:34]

~MediaChannelProxy() override;

[erickung1, 2014/12/21 11:10:47]

This has to be virtual or not virtual(too risky) since the base class is
RefCountedThreadSafe<MediaChannelProxy>  which doesn't use virtual for
destructor

+
+  // Message filter running on the renderer side.
+  scoped_refptr<CmaMessageFilterProxy> filter_;
+
+  // Indicate whether the CMA channel is open.
+  bool is_open_;
+
+  // Unique identifier per media pipeline.
+  int id_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaChannelProxy);

[gunsch, 2014/12/20 22:41:34]

include base/macros.h

[erickung1, 2014/12/21 11:10:47]

Done.

+};
+
+}  // namespace cma
+}  // namespace chromecast
+
+#endif  // CHROMECAST_RENDERER_MEDIA_MEDIA_CHANNEL_PROXY_H_
+