rhubarb-lip-sync/lib/webrtc-8d2248ff/webrtc/sdk/objc/Framework/Classes/RTCMediaStream.mm

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/*
* 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 "RTCMediaStream+Private.h"
#include <vector>
#import "NSString+StdString.h"
#import "RTCAudioTrack+Private.h"
#import "RTCMediaStreamTrack+Private.h"
#import "RTCPeerConnectionFactory+Private.h"
#import "RTCVideoTrack+Private.h"
@implementation RTCMediaStream {
NSMutableArray *_audioTracks;
NSMutableArray *_videoTracks;
rtc::scoped_refptr<webrtc::MediaStreamInterface> _nativeMediaStream;
}
- (instancetype)initWithFactory:(RTCPeerConnectionFactory *)factory
streamId:(NSString *)streamId {
NSParameterAssert(factory);
NSParameterAssert(streamId.length);
std::string nativeId = [NSString stdStringForString:streamId];
rtc::scoped_refptr<webrtc::MediaStreamInterface> stream =
factory.nativeFactory->CreateLocalMediaStream(nativeId);
return [self initWithNativeMediaStream:stream];
}
- (NSArray<RTCAudioTrack *> *)audioTracks {
return [_audioTracks copy];
}
- (NSArray<RTCVideoTrack *> *)videoTracks {
return [_videoTracks copy];
}
- (NSString *)streamId {
return [NSString stringForStdString:_nativeMediaStream->label()];
}
- (void)addAudioTrack:(RTCAudioTrack *)audioTrack {
if (_nativeMediaStream->AddTrack(audioTrack.nativeAudioTrack)) {
[_audioTracks addObject:audioTrack];
}
}
- (void)addVideoTrack:(RTCVideoTrack *)videoTrack {
if (_nativeMediaStream->AddTrack(videoTrack.nativeVideoTrack)) {
[_videoTracks addObject:videoTrack];
}
}
- (void)removeAudioTrack:(RTCAudioTrack *)audioTrack {
NSUInteger index = [_audioTracks indexOfObjectIdenticalTo:audioTrack];
NSAssert(index != NSNotFound,
@"|removeAudioTrack| called on unexpected RTCAudioTrack");
if (index != NSNotFound &&
_nativeMediaStream->RemoveTrack(audioTrack.nativeAudioTrack)) {
[_audioTracks removeObjectAtIndex:index];
}
}
- (void)removeVideoTrack:(RTCVideoTrack *)videoTrack {
NSUInteger index = [_videoTracks indexOfObjectIdenticalTo:videoTrack];
NSAssert(index != NSNotFound,
@"|removeVideoTrack| called on unexpected RTCVideoTrack");
if (index != NSNotFound &&
_nativeMediaStream->RemoveTrack(videoTrack.nativeVideoTrack)) {
[_videoTracks removeObjectAtIndex:index];
}
}
- (NSString *)description {
return [NSString stringWithFormat:@"RTCMediaStream:\n%@\nA=%lu\nV=%lu",
self.streamId,
(unsigned long)self.audioTracks.count,
(unsigned long)self.videoTracks.count];
}
#pragma mark - Private
- (rtc::scoped_refptr<webrtc::MediaStreamInterface>)nativeMediaStream {
return _nativeMediaStream;
}
- (instancetype)initWithNativeMediaStream:
(rtc::scoped_refptr<webrtc::MediaStreamInterface>)nativeMediaStream {
NSParameterAssert(nativeMediaStream);
if (self = [super init]) {
webrtc::AudioTrackVector audioTracks = nativeMediaStream->GetAudioTracks();
webrtc::VideoTrackVector videoTracks = nativeMediaStream->GetVideoTracks();
_audioTracks = [NSMutableArray arrayWithCapacity:audioTracks.size()];
_videoTracks = [NSMutableArray arrayWithCapacity:videoTracks.size()];
_nativeMediaStream = nativeMediaStream;
for (auto &track : audioTracks) {
RTCMediaStreamTrackType type = RTCMediaStreamTrackTypeAudio;
RTCAudioTrack *audioTrack =
[[RTCAudioTrack alloc] initWithNativeTrack:track type:type];
[_audioTracks addObject:audioTrack];
}
for (auto &track : videoTracks) {
RTCMediaStreamTrackType type = RTCMediaStreamTrackTypeVideo;
RTCVideoTrack *videoTrack =
[[RTCVideoTrack alloc] initWithNativeTrack:track type:type];
[_videoTracks addObject:videoTrack];
}
}
return self;
}
@end