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 42namespace blink { 43 44MediaStreamTrack* MediaStreamTrack::create(ExecutionContext* context, MediaStreamComponent* component) 45{ 46 MediaStreamTrack* track = adoptRefCountedGarbageCollectedWillBeNoop(new MediaStreamTrack(context, component)); 47 track->suspendIfNeeded(); 48 return track; 49} 50 51MediaStreamTrack::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 61MediaStreamTrack::~MediaStreamTrack() 62{ 63 m_component->source()->removeObserver(this); 64} 65 66String 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 82String MediaStreamTrack::id() const 83{ 84 return m_component->id(); 85} 86 87String MediaStreamTrack::label() const 88{ 89 return m_component->source()->name(); 90} 91 92bool MediaStreamTrack::enabled() const 93{ 94 return m_component->enabled(); 95} 96 97void 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 108bool MediaStreamTrack::muted() const 109{ 110 return m_component->muted(); 111} 112 113String 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 131void 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 143void 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 154MediaStreamTrack* 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 162bool MediaStreamTrack::ended() const 163{ 164 return m_stopped || (m_readyState == MediaStreamSource::ReadyStateEnded); 165} 166 167void 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 187void 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 196MediaStreamComponent* MediaStreamTrack::component() 197{ 198 return m_component.get(); 199} 200 201void MediaStreamTrack::stop() 202{ 203 m_stopped = true; 204} 205 206PassOwnPtr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource() 207{ 208 return MediaStreamCenter::instance().createWebAudioSourceFromMediaStreamTrack(component()); 209} 210 211void MediaStreamTrack::registerMediaStream(MediaStream* mediaStream) 212{ 213 RELEASE_ASSERT(!m_isIteratingRegisteredMediaStreams); 214 RELEASE_ASSERT(!m_registeredMediaStreams.contains(mediaStream)); 215 m_registeredMediaStreams.add(mediaStream); 216} 217 218void 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 226const AtomicString& MediaStreamTrack::interfaceName() const 227{ 228 return EventTargetNames::MediaStreamTrack; 229} 230 231ExecutionContext* MediaStreamTrack::executionContext() const 232{ 233 return ActiveDOMObject::executionContext(); 234} 235 236void MediaStreamTrack::trace(Visitor* visitor) 237{ 238 visitor->trace(m_registeredMediaStreams); 239 EventTargetWithInlineData::trace(visitor); 240} 241 242} // namespace blink 243