| /* | 
 |  *  Copyright 2021 The WebRTC project authors. All Rights Reserved. | 
 |  * | 
 |  *  Use of this source code is governed by a BSD-style license | 
 |  *  that can be found in the LICENSE file in the root of the source | 
 |  *  tree. An additional intellectual property rights grant can be found | 
 |  *  in the file PATENTS.  All contributing project authors may | 
 |  *  be found in the AUTHORS file in the root of the source tree. | 
 |  */ | 
 |  | 
 | // This file contains interfaces for MediaStream, MediaTrack and MediaSource. | 
 | // These interfaces are used for implementing MediaStream and MediaTrack as | 
 | // defined in http://dev.w3.org/2011/webrtc/editor/webrtc.html#stream-api. These | 
 | // interfaces must be used only with PeerConnection. | 
 |  | 
 | #ifndef API_VIDEO_TRACK_SOURCE_CONSTRAINTS_H_ | 
 | #define API_VIDEO_TRACK_SOURCE_CONSTRAINTS_H_ | 
 |  | 
 | #include "absl/types/optional.h" | 
 |  | 
 | namespace webrtc { | 
 |  | 
 | // This struct definition describes constraints on the video source that may be | 
 | // set with VideoTrackSourceInterface::ProcessConstraints. | 
 | struct VideoTrackSourceConstraints { | 
 |   absl::optional<double> min_fps; | 
 |   absl::optional<double> max_fps; | 
 | }; | 
 |  | 
 | }  // namespace webrtc | 
 |  | 
 | #endif  // API_VIDEO_TRACK_SOURCE_CONSTRAINTS_H_ |