src/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   virtual ~PepperMediaDeviceManager();
  29
  30   // PepperDeviceEnumerationHostHelper::Delegate implementation:
  31   virtual int EnumerateDevices(PP_DeviceType_Dev type,
  32                                const GURL& document_url,
  33                                const EnumerateDevicesCallback& callback)
  34       OVERRIDE;
  35   virtual void StopEnumerateDevices(int request_id) OVERRIDE;
  36
  37   typedef base::Callback<void(int /* request_id */,
  38                               bool /* succeeded */,
  39                               const std::string& /* label */)>
  40       OpenDeviceCallback;
  41
  42   // Opens the specified device. The request ID passed into the callback will be
  43   // the same as the return value. If successful, the label passed into the
  44   // callback identifies a audio/video steam, which can be used to call
  45   // CloseDevice() and GetSesssionID().
  46   int OpenDevice(PP_DeviceType_Dev type,
  47                  const std::string& device_id,
  48                  const GURL& document_url,
  49                  const OpenDeviceCallback& callback);
  50   // Cancels an request to open device, using the request ID returned by
  51   // OpenDevice(). It is guaranteed that the callback passed into OpenDevice()
  52   // won't be called afterwards.
  53   void CancelOpenDevice(int request_id);
  54   void CloseDevice(const std::string& label);
  55   // Gets audio/video session ID given a label.
  56   int GetSessionID(PP_DeviceType_Dev type, const std::string& label);
  57
  58   // MediaStreamDispatcherEventHandler implementation.
  59   virtual void OnStreamGenerated(
  60       int request_id,
  61       const std::string& label,
  62       const StreamDeviceInfoArray& audio_device_array,
  63       const StreamDeviceInfoArray& video_device_array) OVERRIDE;
  64   virtual void OnStreamGenerationFailed(
  65       int request_id,
  66       content::MediaStreamRequestResult result) OVERRIDE;
  67   virtual void OnDeviceStopped(const std::string& label,
  68                                const StreamDeviceInfo& device_info) OVERRIDE;
  69   virtual void OnDevicesEnumerated(int request_id,
  70                                    const StreamDeviceInfoArray& device_array)
  71       OVERRIDE;
  72   virtual void OnDeviceOpened(int request_id,
  73                               const std::string& label,
  74                               const StreamDeviceInfo& device_info) OVERRIDE;
  75   virtual void OnDeviceOpenFailed(int request_id) OVERRIDE;
  76
  77   // Stream type conversion.
  78   static MediaStreamType FromPepperDeviceType(PP_DeviceType_Dev type);
  79   static PP_DeviceType_Dev FromMediaStreamType(MediaStreamType type);
  80
  81  private:
  82   explicit PepperMediaDeviceManager(RenderFrame* render_frame);
  83
  84   // Called by StopEnumerateDevices() after returing to the event loop, to avoid
  85   // a reentrancy problem.
  86   void StopEnumerateDevicesDelayed(int request_id);
  87
  88   void NotifyDeviceOpened(int request_id,
  89                           bool succeeded,
  90                           const std::string& label);
  91
  92
  93   MediaStreamDispatcher* GetMediaStreamDispatcher() const;
  94
  95   int next_id_;
  96
  97   typedef std::map<int, EnumerateDevicesCallback> EnumerateCallbackMap;
  98   EnumerateCallbackMap enumerate_callbacks_;
  99
 100   typedef std::map<int, OpenDeviceCallback> OpenCallbackMap;
 101   OpenCallbackMap open_callbacks_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(PepperMediaDeviceManager);
 104 };
 105
 106 }  // namespace content
 107
 108 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_