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 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 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 61 MediaStreamTrack::~MediaStreamTrack() 62 { 63 m_component->source()->removeObserver(this); 64 } 65 66 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 82 String MediaStreamTrack::id() const 83 { 84 return m_component->id(); 85 } 86 87 String MediaStreamTrack::label() const 88 { 89 return m_component->source()->name(); 90 } 91 92 bool MediaStreamTrack::enabled() const 93 { 94 return m_component->enabled(); 95 } 96 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 } 107 108 bool MediaStreamTrack::muted() const 109 { 110 return m_component->muted(); 111 } 112 113 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 } 130 131 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 } 142 143 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 } 153 154 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 } 161 162 bool MediaStreamTrack::ended() const 163 { 164 return m_stopped || (m_readyState == MediaStreamSource::ReadyStateEnded); 165 } 166 167 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 } 186 187 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 } 195 196 MediaStreamComponent* MediaStreamTrack::component() 197 { 198 return m_component.get(); 199 } 200 201 void MediaStreamTrack::stop() 202 { 203 m_stopped = true; 204 } 205 206 PassOwnPtr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource() 207 { 208 return MediaStreamCenter::instance().createWebAudioSourceFromMediaStreamTrack(component()); 209 } 210 211 void MediaStreamTrack::registerMediaStream(MediaStream* mediaStream) 212 { 213 RELEASE_ASSERT(!m_isIteratingRegisteredMediaStreams); 214 RELEASE_ASSERT(!m_registeredMediaStreams.contains(mediaStream)); 215 m_registeredMediaStreams.add(mediaStream); 216 } 217 218 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 } 225 226 const AtomicString& MediaStreamTrack::interfaceName() const 227 { 228 return EventTargetNames::MediaStreamTrack; 229 } 230 231 ExecutionContext* MediaStreamTrack::executionContext() const 232 { 233 return ActiveDOMObject::executionContext(); 234 } 235 236 void MediaStreamTrack::trace(Visitor* visitor) 237 { 238 visitor->trace(m_registeredMediaStreams); 239 EventTargetWithInlineData::trace(visitor); 240 } 241 242 } // namespace blink 243
