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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
* Copyright (C) 2011, 2012, 2015 Ericsson AB. All rights reserved.
* Copyright (C) 2013-2019 Apple Inc. All rights reserved.
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
*
* 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 "config.h"
#include "MediaStream.h"
#if ENABLE(MEDIA_STREAM)
#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "Logging.h"
#include "MediaStreamTrackEvent.h"
#include "NetworkingContext.h"
#include "Page.h"
#include "RealtimeMediaSource.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/URL.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(MediaStream);
Ref<MediaStream> MediaStream::create(Document& document)
{
return MediaStream::create(document, MediaStreamPrivate::create(document.logger(), { }));
}
Ref<MediaStream> MediaStream::create(Document& document, MediaStream& stream)
{
return adoptRef(*new MediaStream(document, stream.getTracks()));
}
Ref<MediaStream> MediaStream::create(Document& document, const MediaStreamTrackVector& tracks)
{
return adoptRef(*new MediaStream(document, tracks));
}
Ref<MediaStream> MediaStream::create(Document& document, Ref<MediaStreamPrivate>&& streamPrivate)
{
return adoptRef(*new MediaStream(document, WTFMove(streamPrivate)));
}
static inline MediaStreamTrackPrivateVector createTrackPrivateVector(const MediaStreamTrackVector& tracks)
{
MediaStreamTrackPrivateVector trackPrivates;
trackPrivates.reserveCapacity(tracks.size());
for (auto& track : tracks)
trackPrivates.append(&track->privateTrack());
return trackPrivates;
}
MediaStream::MediaStream(Document& document, const MediaStreamTrackVector& tracks)
: ActiveDOMObject(document)
, m_private(MediaStreamPrivate::create(document.logger(), createTrackPrivateVector(tracks)))
{
// This constructor preserves MediaStreamTrack instances and must be used by calls originating
// from the JavaScript MediaStream constructor.
for (auto& track : tracks) {
track->addObserver(*this);
m_trackSet.add(track->id(), track);
}
setIsActive(m_private->active());
m_private->addObserver(*this);
suspendIfNeeded();
}
MediaStream::MediaStream(Document& document, Ref<MediaStreamPrivate>&& streamPrivate)
: ActiveDOMObject(document)
, m_private(WTFMove(streamPrivate))
{
ALWAYS_LOG(LOGIDENTIFIER);
for (auto& trackPrivate : m_private->tracks()) {
auto track = MediaStreamTrack::create(document, *trackPrivate);
track->addObserver(*this);
m_trackSet.add(track->id(), WTFMove(track));
}
setIsActive(m_private->active());
m_private->addObserver(*this);
suspendIfNeeded();
}
MediaStream::~MediaStream()
{
// Set isActive to false immediately so any callbacks triggered by shutting down, e.g.
// mediaState(), are short circuited.
m_isActive = false;
m_private->removeObserver(*this);
for (auto& track : m_trackSet.values())
track->removeObserver(*this);
if (Document* document = this->document()) {
if (m_isWaitingUntilMediaCanStart)
document->removeMediaCanStartListener(*this);
}
}
RefPtr<MediaStream> MediaStream::clone()
{
ALWAYS_LOG(LOGIDENTIFIER);
MediaStreamTrackVector clonedTracks;
clonedTracks.reserveInitialCapacity(m_trackSet.size());
for (auto& track : m_trackSet.values())
clonedTracks.uncheckedAppend(track->clone());
return MediaStream::create(*document(), clonedTracks);
}
void MediaStream::addTrack(MediaStreamTrack& track)
{
ALWAYS_LOG(LOGIDENTIFIER, track.logIdentifier());
if (!internalAddTrack(track, StreamModifier::DomAPI))
return;
for (auto& observer : m_observers)
observer->didAddOrRemoveTrack();
}
void MediaStream::removeTrack(MediaStreamTrack& track)
{
ALWAYS_LOG(LOGIDENTIFIER, track.logIdentifier());
if (!internalRemoveTrack(track.id(), StreamModifier::DomAPI))
return;
for (auto& observer : m_observers)
observer->didAddOrRemoveTrack();
}
MediaStreamTrack* MediaStream::getTrackById(String id)
{
auto it = m_trackSet.find(id);
if (it != m_trackSet.end())
return it->value.get();
return nullptr;
}
MediaStreamTrackVector MediaStream::getAudioTracks() const
{
return trackVectorForType(RealtimeMediaSource::Type::Audio);
}
MediaStreamTrackVector MediaStream::getVideoTracks() const
{
return trackVectorForType(RealtimeMediaSource::Type::Video);
}
MediaStreamTrackVector MediaStream::getTracks() const
{
return copyToVector(m_trackSet.values());
}
void MediaStream::trackDidEnd()
{
m_private->updateActiveState(MediaStreamPrivate::NotifyClientOption::Notify);
}
void MediaStream::activeStatusChanged()
{
updateActiveState();
}
void MediaStream::didAddTrack(MediaStreamTrackPrivate& trackPrivate)
{
ScriptExecutionContext* context = scriptExecutionContext();
if (!context)
return;
if (!getTrackById(trackPrivate.id()))
internalAddTrack(MediaStreamTrack::create(*context, trackPrivate), StreamModifier::Platform);
}
void MediaStream::didRemoveTrack(MediaStreamTrackPrivate& trackPrivate)
{
internalRemoveTrack(trackPrivate.id(), StreamModifier::Platform);
}
void MediaStream::addTrackFromPlatform(Ref<MediaStreamTrack>&& track)
{
ALWAYS_LOG(LOGIDENTIFIER, track->logIdentifier());
auto* privateTrack = &track->privateTrack();
internalAddTrack(WTFMove(track), StreamModifier::Platform);
m_private->addTrack(privateTrack, MediaStreamPrivate::NotifyClientOption::Notify);
}
bool MediaStream::internalAddTrack(Ref<MediaStreamTrack>&& trackToAdd, StreamModifier streamModifier)
{
auto result = m_trackSet.add(trackToAdd->id(), WTFMove(trackToAdd));
if (!result.isNewEntry)
return false;
ASSERT(result.iterator->value);
auto& track = *result.iterator->value;
track.addObserver(*this);
updateActiveState();
if (streamModifier == StreamModifier::DomAPI)
m_private->addTrack(&track.privateTrack(), MediaStreamPrivate::NotifyClientOption::DontNotify);
else
dispatchEvent(MediaStreamTrackEvent::create(eventNames().addtrackEvent, Event::CanBubble::No, Event::IsCancelable::No, &track));
return true;
}
bool MediaStream::internalRemoveTrack(const String& trackId, StreamModifier streamModifier)
{
auto track = m_trackSet.take(trackId);
if (!track)
return false;
track->removeObserver(*this);
updateActiveState();
if (streamModifier == StreamModifier::DomAPI)
m_private->removeTrack(track->privateTrack(), MediaStreamPrivate::NotifyClientOption::DontNotify);
else
dispatchEvent(MediaStreamTrackEvent::create(eventNames().removetrackEvent, Event::CanBubble::No, Event::IsCancelable::No, WTFMove(track)));
return true;
}
void MediaStream::setIsActive(bool active)
{
if (m_isActive == active)
return;
ALWAYS_LOG(LOGIDENTIFIER, active);
m_isActive = active;
statusDidChange();
}
void MediaStream::mediaCanStart(Document& document)
{
ALWAYS_LOG(LOGIDENTIFIER);
ASSERT_UNUSED(document, &document == this->document());
ASSERT(m_isWaitingUntilMediaCanStart);
if (m_isWaitingUntilMediaCanStart) {
m_isWaitingUntilMediaCanStart = false;
startProducingData();
}
}
void MediaStream::startProducingData()
{
Document* document = this->document();
if (!document || !document->page())
return;
ALWAYS_LOG(LOGIDENTIFIER);
// If we can't start a load right away, start it later.
if (!document->page()->canStartMedia()) {
ALWAYS_LOG(LOGIDENTIFIER, "not allowed to start in background, waiting");
if (m_isWaitingUntilMediaCanStart)
return;
m_isWaitingUntilMediaCanStart = true;
document->addMediaCanStartListener(*this);
return;
}
if (m_isProducingData)
return;
m_isProducingData = true;
m_private->startProducingData();
}
void MediaStream::stopProducingData()
{
ALWAYS_LOG(LOGIDENTIFIER);
if (!m_isProducingData)
return;
m_isProducingData = false;
m_private->stopProducingData();
}
MediaProducer::MediaStateFlags MediaStream::mediaState() const
{
MediaProducer::MediaStateFlags state = MediaProducer::IsNotPlaying;
if (!m_isActive || !document() || !document()->page())
return state;
for (const auto& track : m_trackSet.values())
state |= track->mediaState();
return state;
}
void MediaStream::statusDidChange()
{
if (auto* document = this->document()) {
if (!m_isActive)
return;
document->updateIsPlayingMedia();
}
}
void MediaStream::characteristicsChanged()
{
auto state = mediaState();
if (m_state != state) {
m_state = state;
statusDidChange();
}
}
void MediaStream::updateActiveState()
{
bool active = false;
for (auto& track : m_trackSet.values()) {
if (!track->ended()) {
active = true;
break;
}
}
if (m_isActive == active)
return;
setIsActive(active);
}
MediaStreamTrackVector MediaStream::trackVectorForType(RealtimeMediaSource::Type filterType) const
{
MediaStreamTrackVector tracks;
for (auto& track : m_trackSet.values()) {
if (track->source().type() == filterType)
tracks.append(track);
}
return tracks;
}
void MediaStream::addObserver(MediaStream::Observer* observer)
{
if (m_observers.find(observer) == notFound)
m_observers.append(observer);
}
void MediaStream::removeObserver(MediaStream::Observer* observer)
{
size_t pos = m_observers.find(observer);
if (pos != notFound)
m_observers.remove(pos);
}
Document* MediaStream::document() const
{
return downcast<Document>(scriptExecutionContext());
}
void MediaStream::stop()
{
m_isActive = false;
}
const char* MediaStream::activeDOMObjectName() const
{
return "MediaStream";
}
bool MediaStream::canSuspendForDocumentSuspension() const
{
return !hasPendingActivity();
}
bool MediaStream::hasPendingActivity() const
{
return m_isActive;
}
#if !RELEASE_LOG_DISABLED
WTFLogChannel& MediaStream::logChannel() const
{
return LogWebRTC;
}
#endif
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM)