src/content/browser/renderer_host/media/media_stream_dispatcher_host.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_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <utility>
  11
  12 #include "content/browser/renderer_host/media/media_stream_manager.h"
  13 #include "content/browser/renderer_host/media/media_stream_requester.h"
  14 #include "content/common/content_export.h"
  15 #include "content/common/media/media_stream_options.h"
  16 #include "content/public/browser/browser_message_filter.h"
  17
  18 namespace content {
  19 class MediaStreamManager;
  20
  21 // MediaStreamDispatcherHost is a delegate for Media Stream API messages used by
  22 // MediaStreamImpl. It's the complement of MediaStreamDispatcher
  23 // (owned by RenderView).
  24 class CONTENT_EXPORT MediaStreamDispatcherHost : public BrowserMessageFilter,
  25                                                  public MediaStreamRequester {
  26  public:
  27   MediaStreamDispatcherHost(int render_process_id,
  28                             MediaStreamManager* media_stream_manager);
  29
  30   // MediaStreamRequester implementation.
  31   virtual void StreamGenerated(
  32       const std::string& label,
  33       const StreamDeviceInfoArray& audio_devices,
  34       const StreamDeviceInfoArray& video_devices) OVERRIDE;
  35   virtual void StreamGenerationFailed(const std::string& label) OVERRIDE;
  36   virtual void StopGeneratedStream(int render_view_id,
  37                                    const std::string& label) OVERRIDE;
  38   virtual void DevicesEnumerated(const std::string& label,
  39                                  const StreamDeviceInfoArray& devices) OVERRIDE;
  40   virtual void DeviceOpened(const std::string& label,
  41                             const StreamDeviceInfo& video_device) OVERRIDE;
  42
  43   // BrowserMessageFilter implementation.
  44   virtual bool OnMessageReceived(const IPC::Message& message,
  45                                  bool* message_was_ok) OVERRIDE;
  46   virtual void OnChannelClosing() OVERRIDE;
  47
  48  protected:
  49   virtual ~MediaStreamDispatcherHost();
  50
  51  private:
  52   friend class MockMediaStreamDispatcherHost;
  53
  54   struct StreamRequest {
  55     StreamRequest() : render_view_id(0), page_request_id(0) {}
  56     StreamRequest(int render_view_id, int page_request_id)
  57         : render_view_id(render_view_id),
  58           page_request_id(page_request_id ) {
  59     }
  60     int render_view_id;
  61     // Id of the request generated by MediaStreamDispatcher.
  62     int page_request_id;
  63   };
  64   typedef std::map<std::string, StreamRequest> StreamMap;
  65
  66   void OnGenerateStream(int render_view_id,
  67                         int page_request_id,
  68                         const StreamOptions& components,
  69                         const GURL& security_origin);
  70   void OnCancelGenerateStream(int render_view_id,
  71                               int page_request_id);
  72   void OnStopStreamDevice(int render_view_id,
  73                           const std::string& device_id);
  74
  75   void OnEnumerateDevices(int render_view_id,
  76                           int page_request_id,
  77                           MediaStreamType type,
  78                           const GURL& security_origin);
  79
  80   void OnCancelEnumerateDevices(int render_view_id,
  81                                 const std::string& label);
  82
  83   void OnOpenDevice(int render_view_id,
  84                     int page_request_id,
  85                     const std::string& device_id,
  86                     MediaStreamType type,
  87                     const GURL& security_origin);
  88
  89   void OnCloseDevice(int render_view_id,
  90                      const std::string& label);
  91
  92   void StoreRequest(int render_view_id,
  93                     int page_request_id,
  94                     const std::string& label);
  95   StreamRequest PopRequest(const std::string& label);
  96
  97   int render_process_id_;
  98   MediaStreamManager* media_stream_manager_;
  99
 100   // Active requests. When the MediaStreamManager responds to a a request the
 101   // request is removed from this map.
 102   StreamMap streams_;
 103
 104   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
 105 };
 106
 107 }  // namespace content
 108
 109 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_