VideoCapture: migrate last Renderer-->Host msg and start Host-->Renderer migration

content/renderer/media/video_capture_impl.h

 // Copyright (c) 2012 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_VIDEO_CAPTURE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_
 
 #include <stdint.h>
 
 #include <list>
 #include <map>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "content/common/media/video_capture.h"
 #include "content/common/video_capture.mojom.h"
 #include "content/public/renderer/media_stream_video_sink.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 #include "media/base/video_capture_types.h"
+#include "mojo/public/cpp/bindings/binding.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace media {
 class VideoFrame;
 }  // namespace media
 
 namespace content {
 
 // VideoCaptureImpl represents a capture device in renderer process. It provides
 // interfaces for clients to Start/Stop capture. It also communicates to clients
 // when buffer is ready, state of capture device is changed.
 
 // VideoCaptureImpl is also a delegate of VideoCaptureMessageFilter which relays
 // operation of a capture device to the browser process and receives responses
 // from browser process.
 //
 // VideoCaptureImpl is an IO thread only object. See the comments in
 // video_capture_impl_manager.cc for the lifetime of this object.
 // All methods must be called on the IO thread.
 //
 // This is an internal class used by VideoCaptureImplManager only. Do not access
 // this directly.
 class CONTENT_EXPORT VideoCaptureImpl
-    : public VideoCaptureMessageFilter::Delegate {
+    : public VideoCaptureMessageFilter::Delegate,
+      public mojom::VideoCaptureObserver {
  public:
   VideoCaptureImpl(
       media::VideoCaptureSessionId session_id,
       VideoCaptureMessageFilter* filter,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
   ~VideoCaptureImpl() override;
 
   // Stop/resume delivering video frames to clients, based on flag |suspend|.
   void SuspendCapture(bool suspend);
 
@@ skipping 43 matching lines @@
   // Contains information for a video capture client. Including parameters
   // for capturing and callbacks to the client.
   struct ClientInfo {
     ClientInfo();
     ClientInfo(const ClientInfo& other);
     ~ClientInfo();
     media::VideoCaptureParams params;
     VideoCaptureStateUpdateCB state_update_cb;
     VideoCaptureDeliverFrameCB deliver_frame_cb;
   };
-  typedef std::map<int, ClientInfo> ClientInfoMap;
+  using ClientInfoMap = std::map<int, ClientInfo>;
 
-  typedef base::Callback<void(const gpu::SyncToken& sync_token,
-                              double consumer_resource_utilization)>
-      BufferFinishedCallback;
+  using BufferFinishedCallback =
+      base::Callback<void(const gpu::SyncToken& sync_token,
+                          double consumer_resource_utilization)>;
 
-  // VideoCaptureMessageFilter::Delegate interface.
+  // VideoCaptureMessageFilter::Delegate interface implementation.
   void OnBufferCreated(base::SharedMemoryHandle handle,
                        int length,
                        int buffer_id) override;
   void OnBufferDestroyed(int buffer_id) override;
   void OnBufferReceived(int buffer_id,
                         base::TimeDelta timestamp,
                         const base::DictionaryValue& metadata,
                         media::VideoPixelFormat pixel_format,
                         media::VideoFrame::StorageType storage_type,
                         const gfx::Size& coded_size,
                         const gfx::Rect& visible_rect) override;
-  void OnStateChanged(VideoCaptureState state) override;
   void OnDelegateAdded(int32_t device_id) override;
 
+  // mojom::VideoCaptureObserver implementation.
+  void OnStateChanged(mojom::VideoCaptureState state) override;
+
   // Sends an IPC message to browser process when all clients are done with the
   // buffer.
   void OnClientBufferFinished(int buffer_id,
                               const scoped_refptr<ClientBuffer>& buffer,
                               const gpu::SyncToken& release_sync_token,
                               double consumer_resource_utilization);
 
   void StopDevice();
   void RestartCapture();
   void StartCaptureInternal();
@@ skipping 19 matching lines @@
       std::unique_ptr<gpu::SyncToken> release_sync_token,
       const BufferFinishedCallback& callback_to_io_thread);
 
   const scoped_refptr<VideoCaptureMessageFilter> message_filter_;
   int device_id_;
   const int session_id_;
 
   mojom::VideoCaptureHostAssociatedPtr video_capture_host_;
   mojom::VideoCaptureHost* video_capture_host_for_testing_;
 
+  mojo::Binding<mojom::VideoCaptureObserver> observer_binding_;
+
   // Buffers available for sending to the client.
   typedef std::map<int32_t, scoped_refptr<ClientBuffer>> ClientBufferMap;
   ClientBufferMap client_buffers_;
 
   ClientInfoMap clients_;
   ClientInfoMap clients_pending_on_filter_;
   ClientInfoMap clients_pending_on_restart_;
 
   // Member params_ represents the video format requested by the
   // client to this class via StartCapture().
@@ skipping 13 matching lines @@
   // in |client_buffers_|.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_VIDEO_CAPTURE_IMPL_H_