Media Remoting: Update remoting interstitial when status changes.

media/remoting/remoting_interstitial_ui.h

 // Copyright 2016 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 MEDIA_REMOTING_REMOTING_INTERSTITIAL_UI_H_
 #define MEDIA_REMOTING_REMOTING_INTERSTITIAL_UI_H_
 
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "media/base/pipeline_metadata.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/geometry/size.h"

[miu, 2016/12/20 00:16:17]

nit: Since gfx::Size only appears as a const-ref in this header file, just
forward-declare it instead:

  namespace gfx {
  class Size;
  }

[xjz, 2016/12/20 19:32:29]

Done.

 
 namespace media {
 
-class VideoFrame;
 class VideoRendererSink;
 
-class RemotingInterstitialUI {
- public:
-  RemotingInterstitialUI(VideoRendererSink* video_renderer_sink,
-                         const PipelineMetadata& pipeline_metadata);
-  ~RemotingInterstitialUI();
+enum RemotingInterstitialType {

[miu, 2016/12/20 00:16:17]

naming: Let's name these so that they describe which "phase" of UX we're in.
Suggestions:

  NONE --> BETWEEN_SESSIONS (i.e., before or after a session)
  SUCCESS --> IN_SESSION
  FAIL --> ENCRYPTED_MEDIA_FATAL_ERROR

As for the 3rd one: When do we show that? I think we had intended it for when
encrypted media fails to remote. The controller doesn't seem to set the
interstitial appropriately when that happens.

[xjz, 2016/12/20 19:32:28]

Done. As chatted face to face, the 3rd one is set when remoting state changes to
SESSION_PERMANENTLY_STOPPED.

+  NONE,  // No interstitial is drawn. Show background image only.
+  SUCCESS,
+  FAIL,
+};
 
-  void ShowInterstitial(bool is_remoting_successful);
-
- private:
-  // Gets an 'interstitial' VideoFrame to paint on the media player when the
-  // video is being played remotely.
-  scoped_refptr<VideoFrame> GetInterstitial(const SkBitmap& background_image,
-                                            bool is_remoting_successful);
-
-  VideoRendererSink* const video_renderer_sink_;  // Outlives this class.
-  PipelineMetadata pipeline_metadata_;
-
-  DISALLOW_COPY_AND_ASSIGN(RemotingInterstitialUI);
-};
+// Draw remoting interstitial on |background_image| and show it.
+// |background_image| will be scaled to fit in |canvas_size|, but keep its
+// aspect ratio. When has different aspect ratio with |canvas_size|, scaled
+// |background_image| will be centered in the canvas. When |background_image|
+// is empty, interstitial will be drawn on a blank and black background. When
+// |interstial_type| is NONE, show background image only.
+void ShowRemotingInterstitial(VideoRendererSink* video_renderer_sink,

[miu, 2016/12/20 00:16:17]

style nit: Please place the video_renderer_sink "output" argument last (order of
args is always inputs, then in-outs, then outputs).

[xjz, 2016/12/20 19:32:28]

Done.

+                              const SkBitmap& background_image,
+                              const gfx::Size& canvas_size,
+                              RemotingInterstitialType interstitial_type);
 
 }  // namespace media
 
 #endif  // MEDIA_REMOTING_REMOTING_INTERSTITIAL_UI_H_