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_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ 6 #define CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ 7 8 #include "base/callback_forward.h" 9 #include "content/public/browser/media_request_state.h" 10 #include "content/public/common/media_stream_request.h" 11 12 namespace content { 13 14 // An embedder may implement MediaObserver and return it from 15 // ContentBrowserClient to receive callbacks as media events occur. 16 class MediaObserver { 17 public: 18 // Called when a audio capture device is plugged in or unplugged. 19 virtual void OnAudioCaptureDevicesChanged() = 0; 20 21 // Called when a video capture device is plugged in or unplugged. 22 virtual void OnVideoCaptureDevicesChanged() = 0; 23 24 // Called when a media request changes state. 25 virtual void OnMediaRequestStateChanged( 26 int render_process_id, 27 int render_frame_id, 28 int page_request_id, 29 const GURL& security_origin, 30 MediaStreamType stream_type, 31 MediaRequestState state) = 0; 32 33 // Called when an audio stream is being created. 34 virtual void OnCreatingAudioStream(int render_process_id, 35 int render_frame_id) = 0; 36 37 protected: 38 virtual ~MediaObserver() {} 39 }; 40 41 } // namespace content 42 43 #endif // CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ 44
