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 PepperMediaDeviceManager* GetForRenderFrame(RenderFrame* render_frame);
  27   virtual ~PepperMediaDeviceManager();
  28
  29   // PepperDeviceEnumerationHostHelper::Delegate implementation:
  30   virtual int EnumerateDevices(PP_DeviceType_Dev type,
  31                                const GURL& document_url,
  32                                const EnumerateDevicesCallback& callback)
  33       OVERRIDE;
  34   virtual 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   virtual 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   virtual void OnStreamGenerationFailed(
  64       int request_id,
  65       content::MediaStreamRequestResult result) OVERRIDE;
  66   virtual void OnDeviceStopped(const std::string& label,
  67                                const StreamDeviceInfo& device_info) OVERRIDE;
  68   virtual void OnDevicesEnumerated(int request_id,
  69                                    const StreamDeviceInfoArray& device_array)
  70       OVERRIDE;
  71   virtual void OnDeviceOpened(int request_id,
  72                               const std::string& label,
  73                               const StreamDeviceInfo& device_info) OVERRIDE;
  74   virtual void OnDeviceOpenFailed(int request_id) OVERRIDE;
  75
  76   // Stream type conversion.
  77   static MediaStreamType FromPepperDeviceType(PP_DeviceType_Dev type);
  78   static PP_DeviceType_Dev FromMediaStreamType(MediaStreamType type);
  79
  80  private:
  81   explicit PepperMediaDeviceManager(RenderFrame* render_frame);
  82
  83   // Called by StopEnumerateDevices() after returing to the event loop, to avoid
  84   // a reentrancy problem.
  85   void StopEnumerateDevicesDelayed(int request_id);
  86
  87   void NotifyDeviceOpened(int request_id,
  88                           bool succeeded,
  89                           const std::string& label);
  90
  91
  92   MediaStreamDispatcher* GetMediaStreamDispatcher() const;
  93
  94   int next_id_;
  95
  96   typedef std::map<int, EnumerateDevicesCallback> EnumerateCallbackMap;
  97   EnumerateCallbackMap enumerate_callbacks_;
  98
  99   typedef std::map<int, OpenDeviceCallback> OpenCallbackMap;
 100   OpenCallbackMap open_callbacks_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(PepperMediaDeviceManager);
 103 };
 104
 105 }  // namespace content
 106
 107 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_