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 ResourceContext;
  20 }  // namespace content
  21
  22 namespace media_stream {
  23
  24 // MediaStreamDispatcherHost is a delegate for Media Stream API messages used by
  25 // MediaStreamImpl. It's the complement of MediaStreamDispatcher
  26 // (owned by RenderView).
  27 class CONTENT_EXPORT MediaStreamDispatcherHost
  28     : public content::BrowserMessageFilter,
  29       public MediaStreamRequester {
  30  public:
  31   MediaStreamDispatcherHost(content::ResourceContext* resource_context,
  32                             int render_process_id,
  33                             media::AudioManager* audio_manager);
  34   virtual ~MediaStreamDispatcherHost();
  35
  36   // MediaStreamRequester implementation.
  37   virtual void StreamGenerated(
  38       const std::string& label,
  39       const StreamDeviceInfoArray& audio_devices,
  40       const StreamDeviceInfoArray& video_devices) OVERRIDE;
  41   virtual void StreamGenerationFailed(const std::string& label) OVERRIDE;
  42   virtual void AudioDeviceFailed(const std::string& label, int index) OVERRIDE;
  43   virtual void VideoDeviceFailed(const std::string& label, int index) OVERRIDE;
  44   virtual void DevicesEnumerated(const std::string& label,
  45                                  const StreamDeviceInfoArray& devices) OVERRIDE;
  46   virtual void DevicesEnumerationFailed(const std::string& label) OVERRIDE;
  47   virtual void DeviceOpened(const std::string& label,
  48                             const StreamDeviceInfo& video_device) OVERRIDE;
  49   virtual void DeviceOpenFailed(const std::string& label) OVERRIDE;
  50
  51   // content::BrowserMessageFilter implementation.
  52   virtual bool OnMessageReceived(const IPC::Message& message,
  53                                  bool* message_was_ok) OVERRIDE;
  54   virtual void OnChannelClosing() OVERRIDE;
  55
  56  private:
  57   friend class MockMediaStreamDispatcherHost;
  58
  59   void OnGenerateStream(int render_view_id,
  60                         int page_request_id,
  61                         const StreamOptions& components,
  62                         const std::string& security_origin);
  63
  64   void OnStopGeneratedStream(int render_view_id, const std::string& label);
  65
  66   void OnEnumerateDevices(int render_view_id,
  67                           int page_request_id,
  68                           media_stream::MediaStreamType type,
  69                           const std::string& security_origin);
  70
  71   void OnOpenDevice(int render_view_id,
  72                     int page_request_id,
  73                     const std::string& device_id,
  74                     media_stream::MediaStreamType type,
  75                     const std::string& security_origin);
  76
  77   // Returns the media stream manager to forward events to,
  78   // creating one if needed.
  79   MediaStreamManager* manager();
  80
  81   content::ResourceContext* resource_context_;
  82   int render_process_id_;
  83   media::AudioManager* audio_manager_;
  84
  85   struct StreamRequest;
  86   typedef std::map<std::string, StreamRequest> StreamMap;
  87   // Streams generated for this host.
  88   StreamMap streams_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
  91 };
  92
  93 }  // namespace media_stream
  94
  95 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_