| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ |
| #define CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ |
| |
| #include "base/callback_forward.h" |
| #include "content/public/browser/media_request_state.h" |
| #include "content/public/common/media_stream_request.h" |
| |
| namespace content { |
| |
| // An embedder may implement MediaObserver and return it from |
| // ContentBrowserClient to receive callbacks as media events occur. |
| class MediaObserver { |
| public: |
| // Called when a audio capture device is plugged in or unplugged. |
| virtual void OnAudioCaptureDevicesChanged() = 0; |
| |
| // Called when a video capture device is plugged in or unplugged. |
| virtual void OnVideoCaptureDevicesChanged() = 0; |
| |
| // Called when a media request changes state. |
| virtual void OnMediaRequestStateChanged( |
| int render_process_id, |
| int render_frame_id, |
| int page_request_id, |
| const GURL& security_origin, |
| MediaStreamType stream_type, |
| MediaRequestState state) = 0; |
| |
| // Called when an audio stream is being created. |
| virtual void OnCreatingAudioStream(int render_process_id, |
| int render_frame_id) = 0; |
| |
| protected: |
| virtual ~MediaObserver() {} |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_ |