VideoCapturerDelegate: Retrieve supported/in-use format(s) for constraint negotiation

content/renderer/media/media_stream_video_capturer_source.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 CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
 
 #include "base/callback.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/common/media/video_capture.h"
@@ skipping 16 matching lines @@
   typedef base::Callback<void(bool running)> StartedCallback;
   typedef base::Callback<void(const media::VideoCaptureFormats& formats)>
       SupportedFormatsCallback;
 
   explicit VideoCapturerDelegate(
       const StreamDeviceInfo& device_info);
 
   // Collects the formats that can currently be used.
   // |max_requested_height| and |max_requested_width| is used by Tab and Screen
   // capture to decide what resolution to generate.
-  // |callback| is triggered when the formats has been collected.
+  // |callback| is triggered when the formats have been collected.
   virtual void GetCurrentSupportedFormats(
       int max_requested_width,
       int max_requested_height,
       const SupportedFormatsCallback& callback);
 
   // Starts deliver frames using the resolution in |params|.
   // |new_frame_callback| is triggered when a new video frame is available.
   // |started_callback| is triggered before the first video frame is received
   // or if the underlying video capturer fails to start.
   virtual void StartDeliver(
@@ skipping 21 matching lines @@
  private:
   friend class base::RefCountedThreadSafe<VideoCapturerDelegate>;
   friend class MockVideoCapturerDelegate;
 
   virtual ~VideoCapturerDelegate();
 
   void OnFrameReadyOnRenderThread(
       media::VideoCapture* capture,
       const scoped_refptr<media::VideoFrame>& frame);
   void OnErrorOnRenderThread(media::VideoCapture* capture);
+  void OnDeviceFormatsInUseReceived(const media::VideoCaptureFormats& formats);
+  void OnDeviceSupportedFormatsEnumerated(
+      const media::VideoCaptureFormats& formats);
 
   // The id identifies which video capture device is used for this video
   // capture session.
   media::VideoCaptureSessionId session_id_;
   scoped_ptr<VideoCaptureHandle> capture_engine_;
 
   bool is_screen_cast_;
 
   // Accessed on the thread where StartDeliver is called.
   bool got_first_frame_;
 
   // |new_frame_callback_| is provided to this class in StartDeliver and must be
   // valid until StopDeliver is called.
   NewFrameCallback new_frame_callback_;
   // |started_callback| is provided to this class in StartDeliver and must be
   // valid until StopDeliver is called.
   StartedCallback started_callback_;
   // Message loop of the caller of StartDeliver.
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
 
+  SupportedFormatsCallback source_formats_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoCapturerDelegate);
 };
 
 class CONTENT_EXPORT MediaStreamVideoCapturerSource
     : public MediaStreamVideoSource {
  public:
   MediaStreamVideoCapturerSource(
       const StreamDeviceInfo& device_info,
       const SourceStoppedCallback& stop_callback,
       const scoped_refptr<VideoCapturerDelegate>& delegate,
@@ skipping 15 matching lines @@
  private:
   // The delegate that provides video frames.
   scoped_refptr<VideoCapturerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_