1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_
#include "base/check_op.h"
#include "base/dcheck_is_on.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/web/web_frame.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/peerconnection/peer_connection_dependency_factory.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_component_impl.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_source.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/webrtc/api/media_stream_interface.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace blink {
class TrackObserver;
// Base class used for mapping between webrtc and blink MediaStream tracks.
// RemoteMediaStreamImpl has a RemoteMediaStreamTrackAdapter per remote audio
// (RemoteAudioTrackAdapter) and video (RemoteVideoTrackAdapter) track.
template <typename WebRtcMediaStreamTrackType>
class MODULES_EXPORT RemoteMediaStreamTrackAdapter
: public WTF::ThreadSafeRefCounted<
RemoteMediaStreamTrackAdapter<WebRtcMediaStreamTrackType>> {
public:
RemoteMediaStreamTrackAdapter(
const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
WebRtcMediaStreamTrackType* webrtc_track,
ExecutionContext* track_execution_context)
: main_thread_(main_thread),
webrtc_track_(webrtc_track),
track_execution_context_(track_execution_context),
id_(String::FromUTF8(webrtc_track->id())) {}
RemoteMediaStreamTrackAdapter(const RemoteMediaStreamTrackAdapter&) = delete;
RemoteMediaStreamTrackAdapter& operator=(
const RemoteMediaStreamTrackAdapter&) = delete;
const scoped_refptr<WebRtcMediaStreamTrackType>& observed_track() {
return webrtc_track_;
}
MediaStreamComponent* track() {
DCHECK(main_thread_->BelongsToCurrentThread());
DCHECK(component_);
return component_;
}
String id() const { return id_; }
bool initialized() const {
DCHECK(main_thread_->BelongsToCurrentThread());
return !!component_;
}
void Initialize() {
DCHECK(main_thread_->BelongsToCurrentThread());
DCHECK(!initialized());
std::move(web_initialize_).Run();
DCHECK(initialized());
}
protected:
friend class WTF::ThreadSafeRefCounted<
RemoteMediaStreamTrackAdapter<WebRtcMediaStreamTrackType>>;
virtual ~RemoteMediaStreamTrackAdapter() {
DCHECK(main_thread_->BelongsToCurrentThread());
}
void InitializeTrack(
MediaStreamSource::StreamType type,
std::unique_ptr<WebPlatformMediaStreamSource> platform_source,
std::unique_ptr<MediaStreamTrackPlatform> platform_track) {
DCHECK(main_thread_->BelongsToCurrentThread());
DCHECK(!component_);
auto* source = MakeGarbageCollected<MediaStreamSource>(
id_, type, id_, true /*remote*/, std::move(platform_source));
component_ = MakeGarbageCollected<MediaStreamComponentImpl>(
id_, source, std::move(platform_track));
// If we have a reference to a window frame where the track was created,
// store it on the component. This allows other code to use the correct
// per-frame object for the track, such as the audio device for playout.
if (track_execution_context_ && track_execution_context_->IsWindow() &&
To<LocalDOMWindow>(track_execution_context_.Get())->GetFrame()) {
// IsWindow() being true means that the ExecutionContext is a
// LocalDOMWindow, so these casts should be safe.
component_->SetCreationFrameGetter(WTF::BindRepeating(
[](LocalFrame* local_frame) {
return local_frame
? WebFrame::FromCoreFrame(local_frame)->ToWebLocalFrame()
: nullptr;
},
WrapWeakPersistent(
To<LocalDOMWindow>(track_execution_context_.Get())->GetFrame())));
}
DCHECK(component_);
}
const scoped_refptr<base::SingleThreadTaskRunner> main_thread_;
// This callback will be run when Initialize() is called and then freed.
// The callback is used by derived classes to bind objects that need to be
// instantiated and initialized on the signaling thread but then moved to
// and used on the main thread when initializing the web object(s).
CrossThreadOnceClosure web_initialize_;
private:
const scoped_refptr<WebRtcMediaStreamTrackType> webrtc_track_;
CrossThreadPersistent<MediaStreamComponent> component_;
CrossThreadWeakPersistent<ExecutionContext> track_execution_context_;
// const copy of the webrtc track id that allows us to check it from both the
// main and signaling threads without incurring a synchronous thread hop.
const String id_;
};
class MODULES_EXPORT RemoteVideoTrackAdapter
: public RemoteMediaStreamTrackAdapter<webrtc::VideoTrackInterface> {
public:
// Called on the signaling thread.
RemoteVideoTrackAdapter(
const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
webrtc::VideoTrackInterface* webrtc_track,
ExecutionContext* execution_context);
protected:
~RemoteVideoTrackAdapter() override;
private:
void InitializeWebVideoTrack(std::unique_ptr<TrackObserver> observer,
bool enabled);
};
// RemoteAudioTrackAdapter is responsible for listening on state
// change notifications on a remote webrtc audio MediaStreamTracks and notify
// Blink.
class MODULES_EXPORT RemoteAudioTrackAdapter
: public RemoteMediaStreamTrackAdapter<webrtc::AudioTrackInterface>,
public webrtc::ObserverInterface {
public:
// Called on the signaling thread.
RemoteAudioTrackAdapter(
const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
webrtc::AudioTrackInterface* webrtc_track,
ExecutionContext* execution_context);
RemoteAudioTrackAdapter(const RemoteAudioTrackAdapter&) = delete;
RemoteAudioTrackAdapter& operator=(const RemoteAudioTrackAdapter&) = delete;
void Unregister();
protected:
~RemoteAudioTrackAdapter() override;
private:
void InitializeWebAudioTrack(
const scoped_refptr<base::SingleThreadTaskRunner>& main_thread);
// webrtc::ObserverInterface implementation.
void OnChanged() override;
void OnChangedOnMainThread(
webrtc::MediaStreamTrackInterface::TrackState state);
#if DCHECK_IS_ON()
bool unregistered_;
#endif
webrtc::MediaStreamTrackInterface::TrackState state_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_
|
