content/renderer/pepper/pepper_media_device_manager.h

   1 // Copyright (c) 2012 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_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_
   7
   8 #include <map>
   9
  10 #include "base/memory/weak_ptr.h"
  11 #include "content/public/renderer/render_frame_observer.h"
  12 #include "content/public/renderer/render_frame_observer_tracker.h"
  13 #include "content/renderer/media/media_stream_dispatcher_eventhandler.h"
  14 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
  15
  16 namespace content {
  17 class MediaStreamDispatcher;
  18
  19 class PepperMediaDeviceManager
  20     : public MediaStreamDispatcherEventHandler,
  21       public PepperDeviceEnumerationHostHelper::Delegate,
  22       public RenderFrameObserver,
  23       public RenderFrameObserverTracker<PepperMediaDeviceManager>,
  24       public base::SupportsWeakPtr<PepperMediaDeviceManager> {
  25  public:
  26   static base::WeakPtr<PepperMediaDeviceManager> GetForRenderFrame(
  27       RenderFrame* render_frame);
  28   ~PepperMediaDeviceManager() override;
  29
  30   // PepperDeviceEnumerationHostHelper::Delegate implementation:
  31   int EnumerateDevices(PP_DeviceType_Dev type,
  32                        const GURL& document_url,
  33                        const EnumerateDevicesCallback& callback) override;
  34   void StopEnumerateDevices(int request_id) override;
  35
  36   typedef base::Callback<void(int /* request_id */,
  37                               bool /* succeeded */,
  38                               const std::string& /* label */)>
  39       OpenDeviceCallback;
  40
  41   // Opens the specified device. The request ID passed into the callback will be
  42   // the same as the return value. If successful, the label passed into the
  43   // callback identifies a audio/video steam, which can be used to call
  44   // CloseDevice() and GetSesssionID().
  45   int OpenDevice(PP_DeviceType_Dev type,
  46                  const std::string& device_id,
  47                  const GURL& document_url,
  48                  const OpenDeviceCallback& callback);
  49   // Cancels an request to open device, using the request ID returned by
  50   // OpenDevice(). It is guaranteed that the callback passed into OpenDevice()
  51   // won't be called afterwards.
  52   void CancelOpenDevice(int request_id);
  53   void CloseDevice(const std::string& label);
  54   // Gets audio/video session ID given a label.
  55   int GetSessionID(PP_DeviceType_Dev type, const std::string& label);
  56
  57   // MediaStreamDispatcherEventHandler implementation.
  58   void OnStreamGenerated(
  59       int request_id,
  60       const std::string& label,
  61       const StreamDeviceInfoArray& audio_device_array,
  62       const StreamDeviceInfoArray& video_device_array) override;
  63   void OnStreamGenerationFailed(
  64       int request_id,
  65       content::MediaStreamRequestResult result) override;
  66   void OnDeviceStopped(const std::string& label,
  67                        const StreamDeviceInfo& device_info) override;
  68   void OnDevicesEnumerated(int request_id,
  69                            const StreamDeviceInfoArray& device_array) override;
  70   void OnDeviceOpened(int request_id,
  71                       const std::string& label,
  72                       const StreamDeviceInfo& device_info) override;
  73   void OnDeviceOpenFailed(int request_id) override;
  74
  75   // Stream type conversion.
  76   static MediaStreamType FromPepperDeviceType(PP_DeviceType_Dev type);
  77   static PP_DeviceType_Dev FromMediaStreamType(MediaStreamType type);
  78
  79  private:
  80   explicit PepperMediaDeviceManager(RenderFrame* render_frame);
  81
  82   // Called by StopEnumerateDevices() after returing to the event loop, to avoid
  83   // a reentrancy problem.
  84   void StopEnumerateDevicesDelayed(int request_id);
  85
  86   void NotifyDeviceOpened(int request_id,
  87                           bool succeeded,
  88                           const std::string& label);
  89
  90
  91   MediaStreamDispatcher* GetMediaStreamDispatcher() const;
  92
  93   int next_id_;
  94
  95   typedef std::map<int, EnumerateDevicesCallback> EnumerateCallbackMap;
  96   EnumerateCallbackMap enumerate_callbacks_;
  97
  98   typedef std::map<int, OpenDeviceCallback> OpenCallbackMap;
  99   OpenCallbackMap open_callbacks_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(PepperMediaDeviceManager);
 102 };
 103
 104 }  // namespace content
 105
 106 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_