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 "RTCVideoTrack+Internal.h"
33
34#import "RTCMediaStreamTrack+Internal.h"
35#import "RTCPeerConnectionFactory+Internal.h"
36#import "RTCVideoRendererAdapter.h"
37#import "RTCMediaSource+Internal.h"
38#import "RTCVideoSource+Internal.h"
39
40@implementation RTCVideoTrack {
41  NSMutableArray* _adapters;
42}
43
44@synthesize source = _source;
45
46- (instancetype)initWithFactory:(RTCPeerConnectionFactory*)factory
47                         source:(RTCVideoSource*)source
48                        trackId:(NSString*)trackId {
49  NSParameterAssert(factory);
50  NSParameterAssert(source);
51  NSParameterAssert(trackId.length);
52  rtc::scoped_refptr<webrtc::VideoTrackInterface> track =
53      factory.nativeFactory->CreateVideoTrack([trackId UTF8String],
54                                              source.videoSource);
55  if (self = [super initWithMediaTrack:track]) {
56    [self configure];
57    _source = source;
58  }
59  return self;
60}
61
62- (instancetype)initWithMediaTrack:
63    (rtc::scoped_refptr<webrtc::MediaStreamTrackInterface>)mediaTrack {
64  if (self = [super initWithMediaTrack:mediaTrack]) {
65    [self configure];
66    rtc::scoped_refptr<webrtc::VideoSourceInterface> source =
67        self.nativeVideoTrack->GetSource();
68    if (source) {
69      _source = [[RTCVideoSource alloc] initWithMediaSource:source.get()];
70    }
71  }
72  return self;
73}
74
75- (void)configure {
76  _adapters = [NSMutableArray array];
77}
78
79- (void)dealloc {
80  for (RTCVideoRendererAdapter *adapter in _adapters) {
81    self.nativeVideoTrack->RemoveRenderer(adapter.nativeVideoRenderer);
82  }
83}
84
85- (void)addRenderer:(id<RTCVideoRenderer>)renderer {
86  // Make sure we don't have this renderer yet.
87  for (RTCVideoRendererAdapter* adapter in _adapters) {
88    NSParameterAssert(adapter.videoRenderer != renderer);
89  }
90  // Create a wrapper that provides a native pointer for us.
91  RTCVideoRendererAdapter* adapter =
92      [[RTCVideoRendererAdapter alloc] initWithVideoRenderer:renderer];
93  [_adapters addObject:adapter];
94  self.nativeVideoTrack->AddRenderer(adapter.nativeVideoRenderer);
95}
96
97- (void)removeRenderer:(id<RTCVideoRenderer>)renderer {
98  RTCVideoRendererAdapter* adapter = nil;
99  NSUInteger indexToRemove = NSNotFound;
100  for (NSUInteger i = 0; i < _adapters.count; i++) {
101    adapter = _adapters[i];
102    if (adapter.videoRenderer == renderer) {
103      indexToRemove = i;
104      break;
105    }
106  }
107  if (indexToRemove == NSNotFound) {
108    return;
109  }
110  self.nativeVideoTrack->RemoveRenderer(adapter.nativeVideoRenderer);
111  [_adapters removeObjectAtIndex:indexToRemove];
112}
113
114@end
115
116@implementation RTCVideoTrack (Internal)
117
118- (rtc::scoped_refptr<webrtc::VideoTrackInterface>)nativeVideoTrack {
119  return static_cast<webrtc::VideoTrackInterface*>(self.mediaTrack.get());
120}
121
122@end
123