|  | /* | 
|  | *  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 "RTCMediaStreamTrack.h" | 
|  |  | 
|  | #include "webrtc/api/mediastreaminterface.h" | 
|  | #include "webrtc/base/scoped_ptr.h" | 
|  |  | 
|  | typedef NS_ENUM(NSInteger, RTCMediaStreamTrackType) { | 
|  | RTCMediaStreamTrackTypeAudio, | 
|  | RTCMediaStreamTrackTypeVideo, | 
|  | }; | 
|  |  | 
|  | NS_ASSUME_NONNULL_BEGIN | 
|  |  | 
|  | @interface RTCMediaStreamTrack () | 
|  |  | 
|  | /** | 
|  | * The native MediaStreamTrackInterface passed in or created during | 
|  | * construction. | 
|  | */ | 
|  | @property(nonatomic, readonly) | 
|  | rtc::scoped_refptr<webrtc::MediaStreamTrackInterface> nativeTrack; | 
|  |  | 
|  | /** | 
|  | * Initialize an RTCMediaStreamTrack from a native MediaStreamTrackInterface. | 
|  | */ | 
|  | - (instancetype)initWithNativeTrack: | 
|  | (rtc::scoped_refptr<webrtc::MediaStreamTrackInterface>)nativeTrack | 
|  | type:(RTCMediaStreamTrackType)type | 
|  | NS_DESIGNATED_INITIALIZER; | 
|  |  | 
|  | + (webrtc::MediaStreamTrackInterface::TrackState)nativeTrackStateForState: | 
|  | (RTCMediaStreamTrackState)state; | 
|  |  | 
|  | + (RTCMediaStreamTrackState)trackStateForNativeState: | 
|  | (webrtc::MediaStreamTrackInterface::TrackState)nativeState; | 
|  |  | 
|  | + (NSString *)stringForState:(RTCMediaStreamTrackState)state; | 
|  |  | 
|  | @end | 
|  |  | 
|  | NS_ASSUME_NONNULL_END |