content/browser/renderer_host/media/media_stream_ui_proxy.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/public/common/media_stream_request.h"
  13
  14 namespace content {
  15
  16 class RenderViewHostDelegate;
  17
  18 // MediaStreamUIProxy proxies calls to media stream UI between IO thread and UI
  19 // thread. One instance of this class is create per MediaStream object. It must
  20 // be create, used and destroyed on IO thread.
  21 class CONTENT_EXPORT MediaStreamUIProxy {
  22  public:
  23   typedef base::Callback<
  24       void (const MediaStreamDevices& devices,
  25             content::MediaStreamRequestResult result)>
  26         ResponseCallback;
  27
  28   typedef base::Callback<void(gfx::NativeViewId window_id)> WindowIdCallback;
  29
  30   static scoped_ptr<MediaStreamUIProxy> Create();
  31   static scoped_ptr<MediaStreamUIProxy> CreateForTests(
  32       RenderViewHostDelegate* render_delegate);
  33
  34   virtual ~MediaStreamUIProxy();
  35
  36   // Requests access for the MediaStream by calling
  37   // WebContentsDelegate::RequestMediaAccessPermission(). The specified
  38   // |response_callback| is called when the WebContentsDelegate approves or
  39   // denies request.
  40   virtual void RequestAccess(const MediaStreamRequest& request,
  41                              const ResponseCallback& response_callback);
  42
  43   // Notifies the UI that the MediaStream has been started. Must be called after
  44   // access has been approved using RequestAccess(). |stop_callback| is be
  45   // called on the IO thread after the user has requests the stream to be
  46   // stopped. |window_id_callback| is called on the IO thread with the platform-
  47   // dependent window ID of the UI.
  48   virtual void OnStarted(const base::Closure& stop_callback,
  49                          const WindowIdCallback& window_id_callback);
  50
  51   void SetRenderViewHostDelegateForTests(RenderViewHostDelegate* delegate);
  52
  53  protected:
  54   MediaStreamUIProxy(RenderViewHostDelegate* test_render_delegate);
  55
  56  private:
  57   class Core;
  58   friend class Core;
  59   friend class FakeMediaStreamUIProxy;
  60
  61   void ProcessAccessRequestResponse(
  62       const MediaStreamDevices& devices,
  63       content::MediaStreamRequestResult result);
  64   void ProcessStopRequestFromUI();
  65   void OnWindowId(const WindowIdCallback& window_id_callback,
  66                   gfx::NativeViewId* window_id);
  67
  68   scoped_ptr<Core> core_;
  69   ResponseCallback response_callback_;
  70   base::Closure stop_callback_;
  71
  72   base::WeakPtrFactory<MediaStreamUIProxy> weak_factory_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(MediaStreamUIProxy);
  75 };
  76
  77 class CONTENT_EXPORT FakeMediaStreamUIProxy : public MediaStreamUIProxy {
  78  public:
  79   explicit FakeMediaStreamUIProxy();
  80   virtual ~FakeMediaStreamUIProxy();
  81
  82   void SetAvailableDevices(const MediaStreamDevices& devices);
  83
  84   // MediaStreamUIProxy overrides.
  85   virtual void RequestAccess(
  86       const MediaStreamRequest& request,
  87       const ResponseCallback& response_callback) OVERRIDE;
  88   virtual void OnStarted(const base::Closure& stop_callback,
  89                          const WindowIdCallback& window_id_callback) OVERRIDE;
  90
  91  private:
  92   MediaStreamDevices devices_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(FakeMediaStreamUIProxy);
  95 };
  96
  97 }  // namespace content
  98
  99 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_PROXY_H_