Cast: Basic cast_receiver API for chrome.

chrome/renderer/media/cast_receiver_session.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 CHROME_RENDERER_MEDIA_CAST_RECEIVER_SESSION_H_
+#define CHROME_RENDERER_MEDIA_CAST_RECEIVER_SESSION_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "chrome/renderer/media/cast_receiver_session_delegate.h"
+
+namespace blink {
+class WebMediaStream;
+}
+
+namespace media {
+class AudioCapturerSource;
+class VideoCaptureFormat;
+class VideoCapturerSource;
+}
+
+namespace net {
+class IPEndPoint;
+}
+
+namespace base {
+class DictionaryValue;
+}
+
+// This a render thread object, all methods, construction and
+// destruction must happen on the render thread.
+class CastReceiverSession : public base::RefCounted<CastReceiverSession> {
+ public:
+  CastReceiverSession();
+
+  typedef base::Callback<void(scoped_refptr<media::AudioCapturerSource>,
+                              scoped_ptr<media::VideoCapturerSource>)> StartCB;
+
+  // Note that the cast receiver will start responding to
+  // incoming network streams immediately, buffering input until
+  // StartAudio/StartVideo is called.
+  // Five first parameters are passed to cast receiver.
+  // |start_callback| is called when initialization is done.
+  // TODO(hubbe): Currently the audio component of the returned media
+  // stream only the exact format that the sender is sending us.
+  void Start(const media::cast::FrameReceiverConfig& audio_config,
+             const media::cast::FrameReceiverConfig& video_config,
+             const net::IPEndPoint& local_endpoint,
+             const net::IPEndPoint& remote_endpoint,
+             scoped_ptr<base::DictionaryValue> options,
+             const media::VideoCaptureFormat& capture_format,
+             const StartCB& start_callback);
+
+ private:
+  class VideoCapturerSource;
+  class AudioCapturerSource;
+  friend class base::RefCounted<CastReceiverSession>;
+  virtual ~CastReceiverSession();
+  void StartAudio(scoped_refptr<CastReceiverAudioValve> audio_valve);
+
+  void StartVideo(content::VideoCaptureDeliverFrameCB frame_callback);
+  // Stop Video callbacks.
+  // Note that this returns immediately, but callbacks do not stop immediately.
+  void StopVideo();
+
+  media::cast::FrameReceiverConfig audio_config_;
+  media::cast::FrameReceiverConfig video_config_;

[Alpha Left Google, 2015/02/19 01:21:07]

Why remove the const for these two members? I don't see them  altered outside of
the constructor.

[hubbe, 2015/02/19 01:22:31]

They are modified in Start().

+  scoped_ptr<CastReceiverSessionDelegate> delegate_;
+  const scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
+  media::VideoCaptureFormat format_;
+
+  DISALLOW_COPY_AND_ASSIGN(CastReceiverSession);
+};
+
+#endif // CHROME_RENDERER_MEDIA_CAST_RECEIVER_SESSION_H_