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1/*
2 * libjingle
3 * Copyright 2013 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#if !defined(__has_feature) || !__has_feature(objc_arc)
29#error "This file requires ARC support."
30#endif
31
32#import "RTCEnumConverter.h"
33#import "RTCMediaStreamTrack+Internal.h"
34
35namespace webrtc {
36
37class RTCMediaStreamTrackObserver : public ObserverInterface {
38 public:
39  RTCMediaStreamTrackObserver(RTCMediaStreamTrack* track) { _track = track; }
40
41  void OnChanged() override {
42    [_track.delegate mediaStreamTrackDidChange:_track];
43  }
44
45 private:
46  __weak RTCMediaStreamTrack* _track;
47};
48}
49
50@implementation RTCMediaStreamTrack {
51  rtc::scoped_refptr<webrtc::MediaStreamTrackInterface> _mediaTrack;
52  rtc::scoped_ptr<webrtc::RTCMediaStreamTrackObserver> _observer;
53}
54
55@synthesize label;
56
57- (BOOL)isEqual:(id)other {
58  // Equality is purely based on the label just like the C++ implementation.
59  if (self == other)
60    return YES;
61  if (![other isKindOfClass:[self class]] ||
62      ![self isKindOfClass:[other class]]) {
63    return NO;
64  }
65  RTCMediaStreamTrack* otherMediaStream = (RTCMediaStreamTrack*)other;
66  return [self.label isEqual:otherMediaStream.label];
67}
68
69- (NSUInteger)hash {
70  return [self.label hash];
71}
72
73- (NSString*)kind {
74  return @(self.mediaTrack->kind().c_str());
75}
76
77- (NSString*)label {
78  return @(self.mediaTrack->id().c_str());
79}
80
81- (BOOL)isEnabled {
82  return self.mediaTrack->enabled();
83}
84
85- (BOOL)setEnabled:(BOOL)enabled {
86  return self.mediaTrack->set_enabled(enabled);
87}
88
89- (RTCTrackState)state {
90  return [RTCEnumConverter convertTrackStateToObjC:self.mediaTrack->state()];
91}
92
93- (BOOL)setState:(RTCTrackState)state {
94  return self.mediaTrack->set_state(
95      [RTCEnumConverter convertTrackStateToNative:state]);
96}
97
98@end
99
100@implementation RTCMediaStreamTrack (Internal)
101
102- (id)initWithMediaTrack:
103          (rtc::scoped_refptr<webrtc::MediaStreamTrackInterface>)
104      mediaTrack {
105  if (!mediaTrack) {
106    NSAssert(NO, @"nil arguments not allowed");
107    self = nil;
108    return nil;
109  }
110  if (self = [super init]) {
111    _mediaTrack = mediaTrack;
112    label = @(mediaTrack->id().c_str());
113    _observer.reset(new webrtc::RTCMediaStreamTrackObserver(self));
114    _mediaTrack->RegisterObserver(_observer.get());
115  }
116  return self;
117}
118
119- (void)dealloc {
120  _mediaTrack->UnregisterObserver(_observer.get());
121}
122
123- (rtc::scoped_refptr<webrtc::MediaStreamTrackInterface>)mediaTrack {
124  return _mediaTrack;
125}
126
127@end
128