1 /*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 * Copyright (C) 2011 Ericsson AB. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
21 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "modules/mediastream/MediaStreamTrack.h"
28
29 #include "bindings/core/v8/ExceptionMessages.h"
30 #include "core/dom/Document.h"
31 #include "core/dom/ExceptionCode.h"
32 #include "core/dom/ExecutionContext.h"
33 #include "core/events/Event.h"
34 #include "modules/mediastream/MediaStream.h"
35 #include "modules/mediastream/MediaStreamTrackSourcesCallback.h"
36 #include "modules/mediastream/MediaStreamTrackSourcesRequestImpl.h"
37 #include "modules/mediastream/UserMediaController.h"
38 #include "platform/mediastream/MediaStreamCenter.h"
39 #include "platform/mediastream/MediaStreamComponent.h"
40 #include "public/platform/WebSourceInfo.h"
41
42 namespace blink {
43
create(ExecutionContext * context,MediaStreamComponent * component)44 MediaStreamTrack* MediaStreamTrack::create(ExecutionContext* context, MediaStreamComponent* component)
45 {
46 MediaStreamTrack* track = adoptRefCountedGarbageCollectedWillBeNoop(new MediaStreamTrack(context, component));
47 track->suspendIfNeeded();
48 return track;
49 }
50
MediaStreamTrack(ExecutionContext * context,MediaStreamComponent * component)51 MediaStreamTrack::MediaStreamTrack(ExecutionContext* context, MediaStreamComponent* component)
52 : ActiveDOMObject(context)
53 , m_readyState(MediaStreamSource::ReadyStateLive)
54 , m_isIteratingRegisteredMediaStreams(false)
55 , m_stopped(false)
56 , m_component(component)
57 {
58 m_component->source()->addObserver(this);
59 }
60
~MediaStreamTrack()61 MediaStreamTrack::~MediaStreamTrack()
62 {
63 m_component->source()->removeObserver(this);
64 }
65
kind() const66 String MediaStreamTrack::kind() const
67 {
68 DEFINE_STATIC_LOCAL(String, audioKind, ("audio"));
69 DEFINE_STATIC_LOCAL(String, videoKind, ("video"));
70
71 switch (m_component->source()->type()) {
72 case MediaStreamSource::TypeAudio:
73 return audioKind;
74 case MediaStreamSource::TypeVideo:
75 return videoKind;
76 }
77
78 ASSERT_NOT_REACHED();
79 return audioKind;
80 }
81
id() const82 String MediaStreamTrack::id() const
83 {
84 return m_component->id();
85 }
86
label() const87 String MediaStreamTrack::label() const
88 {
89 return m_component->source()->name();
90 }
91
enabled() const92 bool MediaStreamTrack::enabled() const
93 {
94 return m_component->enabled();
95 }
96
setEnabled(bool enabled)97 void MediaStreamTrack::setEnabled(bool enabled)
98 {
99 if (enabled == m_component->enabled())
100 return;
101
102 m_component->setEnabled(enabled);
103
104 if (!ended())
105 MediaStreamCenter::instance().didSetMediaStreamTrackEnabled(m_component.get());
106 }
107
muted() const108 bool MediaStreamTrack::muted() const
109 {
110 return m_component->muted();
111 }
112
readyState() const113 String MediaStreamTrack::readyState() const
114 {
115 if (ended())
116 return "ended";
117
118 switch (m_readyState) {
119 case MediaStreamSource::ReadyStateLive:
120 return "live";
121 case MediaStreamSource::ReadyStateMuted:
122 return "muted";
123 case MediaStreamSource::ReadyStateEnded:
124 return "ended";
125 }
126
127 ASSERT_NOT_REACHED();
128 return String();
129 }
130
getSources(ExecutionContext * context,MediaStreamTrackSourcesCallback * callback,ExceptionState & exceptionState)131 void MediaStreamTrack::getSources(ExecutionContext* context, MediaStreamTrackSourcesCallback* callback, ExceptionState& exceptionState)
132 {
133 LocalFrame* frame = toDocument(context)->frame();
134 UserMediaController* userMedia = UserMediaController::from(frame);
135 if (!userMedia) {
136 exceptionState.throwDOMException(NotSupportedError, "No sources controller available; is this a detached window?");
137 return;
138 }
139 MediaStreamTrackSourcesRequest* request = MediaStreamTrackSourcesRequestImpl::create(*context, callback);
140 userMedia->requestSources(request);
141 }
142
stopTrack(ExceptionState & exceptionState)143 void MediaStreamTrack::stopTrack(ExceptionState& exceptionState)
144 {
145 if (ended())
146 return;
147
148 m_readyState = MediaStreamSource::ReadyStateEnded;
149 MediaStreamCenter::instance().didStopMediaStreamTrack(component());
150 dispatchEvent(Event::create(EventTypeNames::ended));
151 propagateTrackEnded();
152 }
153
clone(ExecutionContext * context)154 MediaStreamTrack* MediaStreamTrack::clone(ExecutionContext* context)
155 {
156 RefPtr<MediaStreamComponent> clonedComponent = MediaStreamComponent::create(component()->source());
157 MediaStreamTrack* clonedTrack = MediaStreamTrack::create(context, clonedComponent.get());
158 MediaStreamCenter::instance().didCreateMediaStreamTrack(clonedComponent.get());
159 return clonedTrack;
160 }
161
ended() const162 bool MediaStreamTrack::ended() const
163 {
164 return m_stopped || (m_readyState == MediaStreamSource::ReadyStateEnded);
165 }
166
sourceChangedState()167 void MediaStreamTrack::sourceChangedState()
168 {
169 if (ended())
170 return;
171
172 m_readyState = m_component->source()->readyState();
173 switch (m_readyState) {
174 case MediaStreamSource::ReadyStateLive:
175 dispatchEvent(Event::create(EventTypeNames::unmute));
176 break;
177 case MediaStreamSource::ReadyStateMuted:
178 dispatchEvent(Event::create(EventTypeNames::mute));
179 break;
180 case MediaStreamSource::ReadyStateEnded:
181 dispatchEvent(Event::create(EventTypeNames::ended));
182 propagateTrackEnded();
183 break;
184 }
185 }
186
propagateTrackEnded()187 void MediaStreamTrack::propagateTrackEnded()
188 {
189 RELEASE_ASSERT(!m_isIteratingRegisteredMediaStreams);
190 m_isIteratingRegisteredMediaStreams = true;
191 for (HeapHashSet<Member<MediaStream> >::iterator iter = m_registeredMediaStreams.begin(); iter != m_registeredMediaStreams.end(); ++iter)
192 (*iter)->trackEnded();
193 m_isIteratingRegisteredMediaStreams = false;
194 }
195
component()196 MediaStreamComponent* MediaStreamTrack::component()
197 {
198 return m_component.get();
199 }
200
stop()201 void MediaStreamTrack::stop()
202 {
203 m_stopped = true;
204 }
205
createWebAudioSource()206 PassOwnPtr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource()
207 {
208 return MediaStreamCenter::instance().createWebAudioSourceFromMediaStreamTrack(component());
209 }
210
registerMediaStream(MediaStream * mediaStream)211 void MediaStreamTrack::registerMediaStream(MediaStream* mediaStream)
212 {
213 RELEASE_ASSERT(!m_isIteratingRegisteredMediaStreams);
214 RELEASE_ASSERT(!m_registeredMediaStreams.contains(mediaStream));
215 m_registeredMediaStreams.add(mediaStream);
216 }
217
unregisterMediaStream(MediaStream * mediaStream)218 void MediaStreamTrack::unregisterMediaStream(MediaStream* mediaStream)
219 {
220 RELEASE_ASSERT(!m_isIteratingRegisteredMediaStreams);
221 HeapHashSet<Member<MediaStream> >::iterator iter = m_registeredMediaStreams.find(mediaStream);
222 RELEASE_ASSERT(iter != m_registeredMediaStreams.end());
223 m_registeredMediaStreams.remove(iter);
224 }
225
interfaceName() const226 const AtomicString& MediaStreamTrack::interfaceName() const
227 {
228 return EventTargetNames::MediaStreamTrack;
229 }
230
executionContext() const231 ExecutionContext* MediaStreamTrack::executionContext() const
232 {
233 return ActiveDOMObject::executionContext();
234 }
235
trace(Visitor * visitor)236 void MediaStreamTrack::trace(Visitor* visitor)
237 {
238 visitor->trace(m_registeredMediaStreams);
239 EventTargetWithInlineData::trace(visitor);
240 }
241
242 } // namespace blink
243