| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * Copyright (C) 2011 Ericsson AB. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "modules/mediastream/MediaStreamTrack.h" |
| |
| #include "bindings/core/v8/ExceptionMessages.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/dom/ExecutionContext.h" |
| #include "core/events/Event.h" |
| #include "core/frame/Deprecation.h" |
| #include "modules/mediastream/MediaConstraintsImpl.h" |
| #include "modules/mediastream/MediaStream.h" |
| #include "modules/mediastream/MediaStreamTrackSourcesCallback.h" |
| #include "modules/mediastream/MediaStreamTrackSourcesRequestImpl.h" |
| #include "modules/mediastream/MediaTrackSettings.h" |
| #include "modules/mediastream/UserMediaController.h" |
| #include "platform/mediastream/MediaStreamCenter.h" |
| #include "platform/mediastream/MediaStreamComponent.h" |
| #include "public/platform/WebMediaStreamTrack.h" |
| #include "public/platform/WebSourceInfo.h" |
| #include "wtf/Assertions.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| MediaStreamTrack* MediaStreamTrack::create(ExecutionContext* context, |
| MediaStreamComponent* component) { |
| MediaStreamTrack* track = new MediaStreamTrack(context, component); |
| track->suspendIfNeeded(); |
| return track; |
| } |
| |
| MediaStreamTrack::MediaStreamTrack(ExecutionContext* context, |
| MediaStreamComponent* component) |
| : ActiveScriptWrappable(this), |
| ActiveDOMObject(context), |
| m_readyState(MediaStreamSource::ReadyStateLive), |
| m_isIteratingRegisteredMediaStreams(false), |
| m_stopped(false), |
| m_component(component) |
| // The source's constraints aren't yet initialized at creation time. |
| , |
| m_constraints() { |
| m_component->source()->addObserver(this); |
| } |
| |
| MediaStreamTrack::~MediaStreamTrack() {} |
| |
| String MediaStreamTrack::kind() const { |
| DEFINE_STATIC_LOCAL(String, audioKind, ("audio")); |
| DEFINE_STATIC_LOCAL(String, videoKind, ("video")); |
| |
| switch (m_component->source()->type()) { |
| case MediaStreamSource::TypeAudio: |
| return audioKind; |
| case MediaStreamSource::TypeVideo: |
| return videoKind; |
| } |
| |
| NOTREACHED(); |
| return audioKind; |
| } |
| |
| String MediaStreamTrack::id() const { |
| return m_component->id(); |
| } |
| |
| String MediaStreamTrack::label() const { |
| return m_component->source()->name(); |
| } |
| |
| bool MediaStreamTrack::enabled() const { |
| return m_component->enabled(); |
| } |
| |
| void MediaStreamTrack::setEnabled(bool enabled) { |
| if (enabled == m_component->enabled()) |
| return; |
| |
| m_component->setEnabled(enabled); |
| |
| if (!ended()) |
| MediaStreamCenter::instance().didSetMediaStreamTrackEnabled( |
| m_component.get()); |
| } |
| |
| bool MediaStreamTrack::muted() const { |
| return m_component->muted(); |
| } |
| |
| bool MediaStreamTrack::remote() const { |
| return m_component->source()->remote(); |
| } |
| |
| String MediaStreamTrack::readyState() const { |
| if (ended()) |
| return "ended"; |
| |
| switch (m_readyState) { |
| case MediaStreamSource::ReadyStateLive: |
| return "live"; |
| case MediaStreamSource::ReadyStateMuted: |
| return "muted"; |
| case MediaStreamSource::ReadyStateEnded: |
| return "ended"; |
| } |
| |
| NOTREACHED(); |
| return String(); |
| } |
| |
| void MediaStreamTrack::getSources(ExecutionContext* context, |
| MediaStreamTrackSourcesCallback* callback, |
| ExceptionState& exceptionState) { |
| LocalFrame* frame = toDocument(context)->frame(); |
| UserMediaController* userMedia = UserMediaController::from(frame); |
| if (!userMedia) { |
| exceptionState.throwDOMException( |
| NotSupportedError, |
| "No sources controller available; is this a detached window?"); |
| return; |
| } |
| Deprecation::countDeprecation(context, |
| UseCounter::MediaStreamTrackGetSources); |
| MediaStreamTrackSourcesRequest* request = |
| MediaStreamTrackSourcesRequestImpl::create(*context, callback); |
| userMedia->requestSources(request); |
| } |
| |
| void MediaStreamTrack::stopTrack(ExceptionState& exceptionState) { |
| if (ended()) |
| return; |
| |
| m_readyState = MediaStreamSource::ReadyStateEnded; |
| MediaStreamCenter::instance().didStopMediaStreamTrack(component()); |
| dispatchEvent(Event::create(EventTypeNames::ended)); |
| propagateTrackEnded(); |
| } |
| |
| MediaStreamTrack* MediaStreamTrack::clone(ExecutionContext* context) { |
| MediaStreamComponent* clonedComponent = |
| MediaStreamComponent::create(component()->source()); |
| MediaStreamTrack* clonedTrack = |
| MediaStreamTrack::create(context, clonedComponent); |
| MediaStreamCenter::instance().didCreateMediaStreamTrack(clonedComponent); |
| return clonedTrack; |
| } |
| |
| void MediaStreamTrack::getConstraints(MediaTrackConstraints& constraints) { |
| MediaConstraintsImpl::convertConstraints(m_constraints, constraints); |
| } |
| |
| void MediaStreamTrack::setConstraints(const WebMediaConstraints& constraints) { |
| m_constraints = constraints; |
| } |
| |
| void MediaStreamTrack::getSettings(MediaTrackSettings& settings) { |
| WebMediaStreamTrack::Settings platformSettings; |
| m_component->getSettings(platformSettings); |
| if (platformSettings.hasFrameRate()) { |
| settings.setFrameRate(platformSettings.frameRate); |
| } |
| if (platformSettings.hasWidth()) { |
| settings.setWidth(platformSettings.width); |
| } |
| if (platformSettings.hasHeight()) { |
| settings.setHeight(platformSettings.height); |
| } |
| settings.setDeviceId(platformSettings.deviceId); |
| } |
| |
| bool MediaStreamTrack::ended() const { |
| return m_stopped || (m_readyState == MediaStreamSource::ReadyStateEnded); |
| } |
| |
| void MediaStreamTrack::sourceChangedState() { |
| if (ended()) |
| return; |
| |
| m_readyState = m_component->source()->getReadyState(); |
| switch (m_readyState) { |
| case MediaStreamSource::ReadyStateLive: |
| m_component->setMuted(false); |
| dispatchEvent(Event::create(EventTypeNames::unmute)); |
| break; |
| case MediaStreamSource::ReadyStateMuted: |
| m_component->setMuted(true); |
| dispatchEvent(Event::create(EventTypeNames::mute)); |
| break; |
| case MediaStreamSource::ReadyStateEnded: |
| dispatchEvent(Event::create(EventTypeNames::ended)); |
| propagateTrackEnded(); |
| break; |
| } |
| } |
| |
| void MediaStreamTrack::propagateTrackEnded() { |
| CHECK(!m_isIteratingRegisteredMediaStreams); |
| m_isIteratingRegisteredMediaStreams = true; |
| for (HeapHashSet<Member<MediaStream>>::iterator iter = |
| m_registeredMediaStreams.begin(); |
| iter != m_registeredMediaStreams.end(); ++iter) |
| (*iter)->trackEnded(); |
| m_isIteratingRegisteredMediaStreams = false; |
| } |
| |
| void MediaStreamTrack::stop() { |
| m_stopped = true; |
| } |
| |
| bool MediaStreamTrack::hasPendingActivity() const { |
| // If 'ended' listeners exist and the object hasn't yet reached |
| // that state, keep the object alive. |
| // |
| // An otherwise unreachable MediaStreamTrack object in an non-ended |
| // state will otherwise indirectly be transitioned to the 'ended' state |
| // while finalizing m_component. Which dispatches an 'ended' event, |
| // referring to this object as the target. If this object is then GCed |
| // at the same time, v8 objects will retain (wrapper) references to |
| // this dead MediaStreamTrack object. Bad. |
| // |
| // Hence insisting on keeping this object alive until the 'ended' |
| // state has been reached & handled. |
| return !ended() && hasEventListeners(EventTypeNames::ended); |
| } |
| |
| std::unique_ptr<AudioSourceProvider> MediaStreamTrack::createWebAudioSource() { |
| return MediaStreamCenter::instance().createWebAudioSourceFromMediaStreamTrack( |
| component()); |
| } |
| |
| void MediaStreamTrack::registerMediaStream(MediaStream* mediaStream) { |
| CHECK(!m_isIteratingRegisteredMediaStreams); |
| CHECK(!m_registeredMediaStreams.contains(mediaStream)); |
| m_registeredMediaStreams.add(mediaStream); |
| } |
| |
| void MediaStreamTrack::unregisterMediaStream(MediaStream* mediaStream) { |
| CHECK(!m_isIteratingRegisteredMediaStreams); |
| HeapHashSet<Member<MediaStream>>::iterator iter = |
| m_registeredMediaStreams.find(mediaStream); |
| CHECK(iter != m_registeredMediaStreams.end()); |
| m_registeredMediaStreams.remove(iter); |
| } |
| |
| const AtomicString& MediaStreamTrack::interfaceName() const { |
| return EventTargetNames::MediaStreamTrack; |
| } |
| |
| ExecutionContext* MediaStreamTrack::getExecutionContext() const { |
| return ActiveDOMObject::getExecutionContext(); |
| } |
| |
| DEFINE_TRACE(MediaStreamTrack) { |
| visitor->trace(m_registeredMediaStreams); |
| visitor->trace(m_component); |
| EventTargetWithInlineData::trace(visitor); |
| ActiveDOMObject::trace(visitor); |
| } |
| |
| } // namespace blink |