media: add ArcCamera3Service Mojo service

media/capture/video/chromeos/camera_hal_delegate.h

 // Copyright 2017 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_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_
 #define MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_
 
 #include <memory>
 #include <string>
 #include <unordered_map>
 
 #include "base/macros.h"
 #include "base/sequence_checker.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
+#include "media/capture/video/chromeos/arc_camera3_service.h"
 #include "media/capture/video/chromeos/mojo/arc_camera3.mojom.h"
 #include "media/capture/video/video_capture_device_factory.h"
 #include "media/capture/video_capture_types.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace media {
 
 // CameraHalDelegate is the component which does Mojo IPCs to the camera HAL
 // process on Chrome OS to access the module-level camera functionalities such
 // as camera device info look-up and opening camera devices.
 //
 // CameraHalDelegate is refcounted because VideoCaptureDeviceFactoryChromeOS and
 // CameraDeviceDelegate both need to reference CameraHalDelegate, and
 // VideoCaptureDeviceFactoryChromeOS may be destroyed while CameraDeviceDelegate
 // is still alive.
 class CAPTURE_EXPORT CameraHalDelegate final
     : public base::RefCountedThreadSafe<CameraHalDelegate>,
       public arc::mojom::CameraModuleCallbacks {
  public:
   // All the Mojo IPC operations happen on |ipc_task_runner|.
   explicit CameraHalDelegate(
       scoped_refptr<base::SingleThreadTaskRunner> ipc_task_runner);
 
-  // Establishes the Mojo IPC channel to the camera HAL adapter.  This method
-  // should be called before any other methods of CameraHalDelegate is called.
-  bool StartCameraModuleIpc();
+  // Registers the camera client observer to the ArcCamera3Service Mojo service.
+  void RegisterCameraClient();
 
   // Resets |camera_module_| and |camera_module_callbacks_|.
   void Reset();
 
   // Delegation methods for the VideoCaptureDeviceFactory interface.  These
   // methods are called by VideoCaptureDeviceFactoryChromeOS directly.  They
   // operate on the same thread that the VideoCaptureDeviceFactoryChromeOS runs
   // on.
   std::unique_ptr<VideoCaptureDevice> CreateDevice(
       scoped_refptr<base::SingleThreadTaskRunner>
@@ skipping 18 matching lines @@
                   arc::mojom::Camera3DeviceOpsRequest device_ops_request,
                   const OpenDeviceCallback& callback);
 
  private:
   friend class base::RefCountedThreadSafe<CameraHalDelegate>;
 
   ~CameraHalDelegate();
 
   friend class CameraHalDelegateTest;
   friend class CameraDeviceDelegateTest;
-  void StartForTesting(arc::mojom::CameraModulePtrInfo info);
+
+  class LocalCameraClient : public ArcCamera3Service::CameraClientObserver {
+   public:
+    LocalCameraClient(scoped_refptr<CameraHalDelegate> camera_hal_delegate);
+
+    void NotifyCameraHalRegistered(arc::mojom::CameraModulePtr camera_module);
+
+   private:
+    scoped_refptr<CameraHalDelegate> camera_hal_delegate_;
+    DISALLOW_IMPLICIT_CONSTRUCTORS(LocalCameraClient);
+  };
+
+  void SetCameraModule(arc::mojom::CameraModulePtrInfo camera_module_ptr_info);
+  base::WaitableEvent camera_module_set_;
+
+  // Mojo connection error handler.  On Mojo connection error, the handler will
+  // try to re-establish the Mojo connection to the camera HAL.
+  void SetConnectionErrorHandlerOnModuleThread();
+  void HandleMojoConnectionErrorOnModuleThread();
 
   // Resets the Mojo interface and bindings.
   void ResetMojoInterfaceOnModuleThread();
 
   // Internal method to update the camera info for all built-in cameras. Runs on
   // the same thread as CreateDevice, GetSupportedFormats, and
   // GetDeviceDescriptors.
   bool UpdateBuiltInCameraInfo();
   void UpdateBuiltInCameraInfoOnModuleThread();
   // Callback for GetNumberOfCameras Mojo IPC function.  GetNumberOfCameras
@@ skipping 47 matching lines @@
   // The Mojo binding serving the camera module callbacks.  Bound to
   // |ipc_task_runner_|.
   mojo::Binding<arc::mojom::CameraModuleCallbacks> camera_module_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(CameraHalDelegate);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DELEGATE_H_