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      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/renderer/media/media_stream_dispatcher_eventhandler.h"
     12 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
     13 #include "content/public/renderer/render_view_observer_tracker.h"
     14 #include "content/public/renderer/render_view_observer.h"
     15 
     16 namespace content {
     17 class RenderViewImpl;
     18 
     19 class PepperMediaDeviceManager
     20     : public MediaStreamDispatcherEventHandler,
     21       public PepperDeviceEnumerationHostHelper::Delegate,
     22       public RenderViewObserver,
     23       public RenderViewObserverTracker<PepperMediaDeviceManager>,
     24       public base::SupportsWeakPtr<PepperMediaDeviceManager> {
     25  public:
     26   static PepperMediaDeviceManager* GetForRenderView(RenderView* render_view);
     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   PepperMediaDeviceManager(RenderView* render_view);
     82 
     83   void NotifyDeviceOpened(int request_id,
     84                           bool succeeded,
     85                           const std::string& label);
     86 
     87   RenderViewImpl* GetRenderViewImpl();
     88 
     89   int next_id_;
     90 
     91   typedef std::map<int, EnumerateDevicesCallback> EnumerateCallbackMap;
     92   EnumerateCallbackMap enumerate_callbacks_;
     93 
     94   typedef std::map<int, OpenDeviceCallback> OpenCallbackMap;
     95   OpenCallbackMap open_callbacks_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(PepperMediaDeviceManager);
     98 };
     99 
    100 }  // namespace content
    101 
    102 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_
    103