text: /*
   *  Copyright 2015 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.
   */
  
  #import <Foundation/Foundation.h>
  
  #import "RTCMacros.h"
  
  /**
   * Represents the state of the track. This exposes the same states in C++.
   */
  typedef NS_ENUM(NSInteger, RTCMediaStreamTrackState) {
    RTCMediaStreamTrackStateLive,
    RTCMediaStreamTrackStateEnded
  };
  
  NS_ASSUME_NONNULL_BEGIN
  
  RTC_EXTERN NSString *const kRTCMediaStreamTrackKindAudio;
  RTC_EXTERN NSString *const kRTCMediaStreamTrackKindVideo;
  
  RTC_OBJC_EXPORT
  @interface RTCMediaStreamTrack : NSObject
  
  /**
   * The kind of track. For example, "audio" if this track represents an audio
   * track and "video" if this track represents a video track.
   */
  @property(nonatomic, readonly) NSString *kind;
  
  /** An identifier string. */
  @property(nonatomic, readonly) NSString *trackId;
  
  /** The enabled state of the track. */
  @property(nonatomic, assign) BOOL isEnabled;
  
  /** The state of the track. */
  @property(nonatomic, readonly) RTCMediaStreamTrackState readyState;
  
  - (instancetype)init NS_UNAVAILABLE;
  
  @end
  
  NS_ASSUME_NONNULL_END
  