content/browser/renderer_host/media/media_capture_devices_impl.h

   1 // Copyright 2014 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_CAPTURE_DEVICES_IMPL_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_CAPTURE_DEVICES_IMPL_H_
   7
   8 #include "base/memory/singleton.h"
   9 #include "content/public/browser/media_capture_devices.h"
  10
  11 namespace content {
  12
  13 class MediaCaptureDevicesImpl : public MediaCaptureDevices {
  14  public:
  15   static MediaCaptureDevicesImpl* GetInstance();
  16
  17   // Overriden from MediaCaptureDevices
  18   const MediaStreamDevices& GetAudioCaptureDevices() override;
  19   const MediaStreamDevices& GetVideoCaptureDevices() override;
  20
  21   // Called by MediaStreamManager to notify the change of media capture
  22   // devices, these 2 methods are called in IO thread.
  23   void OnAudioCaptureDevicesChanged(const MediaStreamDevices& devices);
  24   void OnVideoCaptureDevicesChanged(const MediaStreamDevices& devices);
  25
  26  private:
  27   friend struct DefaultSingletonTraits<MediaCaptureDevicesImpl>;
  28   MediaCaptureDevicesImpl();
  29   ~MediaCaptureDevicesImpl() override;
  30
  31   void UpdateAudioDevicesOnUIThread(const content::MediaStreamDevices& devices);
  32   void UpdateVideoDevicesOnUIThread(const content::MediaStreamDevices& devices);
  33
  34   // Flag to indicate if device enumeration has been done/doing.
  35   // Only accessed on UI thread.
  36   bool devices_enumerated_;
  37
  38   // A list of cached audio capture devices.
  39   MediaStreamDevices audio_devices_;
  40
  41   // A list of cached video capture devices.
  42   MediaStreamDevices video_devices_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(MediaCaptureDevicesImpl);
  45 };
  46
  47 }  // namespace content
  48
  49 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_CAPTURE_DEVICES_IMPL_H_