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