content/browser/renderer_host/media/media_stream_requester.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_REQUESTER_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_
   7
   8 #include <string>
   9
  10 #include "content/common/content_export.h"
  11 #include "content/common/media/media_stream_options.h"
  12
  13 namespace content {
  14
  15 // MediaStreamRequester must be implemented by the class requesting a new media
  16 // stream to be opened. MediaStreamManager will use this interface to signal
  17 // success and error for a request.
  18 class CONTENT_EXPORT MediaStreamRequester {
  19  public:
  20   // Called as a reply of a successful call to GenerateStream.
  21   virtual void StreamGenerated(int render_frame_id,
  22                                int page_request_id,
  23                                const std::string& label,
  24                                const StreamDeviceInfoArray& audio_devices,
  25                                const StreamDeviceInfoArray& video_devices) = 0;
  26   // Called if GenerateStream failed.
  27   virtual void StreamGenerationFailed(
  28       int render_frame_id,
  29       int page_request_id,
  30       content::MediaStreamRequestResult result) = 0;
  31   // Called if a device has been stopped by a user from UI or the device
  32   // has become unavailable.  |render_frame_id| is the render frame that
  33   // requested the device and |label| is the label of the request.
  34   virtual void DeviceStopped(int render_frame_id,
  35                              const std::string& label,
  36                              const StreamDeviceInfo& device) = 0;
  37   // Called as a reply of a successful call to EnumerateDevices.
  38   virtual void DevicesEnumerated(int render_frame_id,
  39                                  int page_request_id,
  40                                  const std::string& label,
  41                                  const StreamDeviceInfoArray& devices) = 0;
  42   // Called as a reply of a successful call to OpenDevice.
  43   virtual void DeviceOpened(int render_frame_id,
  44                             int page_request_id,
  45                             const std::string& label,
  46                             const StreamDeviceInfo& device_info) = 0;
  47
  48  protected:
  49   virtual ~MediaStreamRequester() {
  50   }
  51 };
  52
  53 }  // namespace content
  54
  55 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_REQUESTER_H_