MediaStream* HTMLCanvasElementCapture::captureStream(HTMLCanvasElement& element, bool givenFrameRate, double frameRate, ExceptionState& exceptionState)
{
if (!element.originClean()) {
exceptionState.throwSecurityError("Canvas is not origin-clean.");
return nullptr;
}
WebMediaStreamTrack track;
WebSize size(element.width(), element.height());
OwnPtr<WebCanvasCaptureHandler> handler;
if (givenFrameRate)
handler = adoptPtr(Platform::current()->createCanvasCaptureHandler(size, frameRate, &track));
else
handler = adoptPtr(Platform::current()->createCanvasCaptureHandler(size, kDefaultFrameRate, &track));
ASSERT(handler);
if (!handler) {
exceptionState.throwDOMException(NotSupportedError, "No CanvasCapture handler can be created.");
return nullptr;
}
MediaStreamTrackVector tracks;
if (givenFrameRate)
tracks.append(CanvasCaptureMediaStreamTrack::create(track, &element, handler.release(), frameRate));
else
tracks.append(CanvasCaptureMediaStreamTrack::create(track, &element, handler.release()));
// We want to capture one frame in the beginning.
element.notifyListenersCanvasChanged();
return MediaStream::create(element.executionContext(), tracks);
}
PassRefPtr<MediaStreamAudioSourceNode> AudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionState& es)
{
ASSERT(mediaStream);
if (!mediaStream) {
es.throwDOMException(InvalidStateError);
return 0;
}
ASSERT(isMainThread());
lazyInitialize();
AudioSourceProvider* provider = 0;
MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
// FIXME: get a provider for non-local MediaStreams (like from a remote peer).
for (size_t i = 0; i < audioTracks.size(); ++i) {
RefPtr<MediaStreamTrack> localAudio = audioTracks[i];
if (localAudio->component()->audioSourceProvider()) {
provider = localAudio->component()->audioSourceProvider();
break;
}
}
RefPtr<MediaStreamAudioSourceNode> node = MediaStreamAudioSourceNode::create(this, mediaStream, provider);
// FIXME: Only stereo streams are supported right now. We should be able to accept multi-channel streams.
node->setFormat(2, sampleRate());
refNode(node.get()); // context keeps reference until node is disconnected
return node;
}
PassRefPtr<MediaStreamAudioSourceNode> AudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionCode& ec)
{
ASSERT(mediaStream);
if (!mediaStream) {
ec = INVALID_STATE_ERR;
return 0;
}
ASSERT(isMainThread());
lazyInitialize();
AudioSourceProvider* provider = 0;
MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
if (mediaStream->isLocal() && audioTracks.size()) {
// Enable input for the specific local audio device specified in the MediaStreamSource.
RefPtr<MediaStreamTrack> localAudio = audioTracks[0];
MediaStreamSource* source = localAudio->component()->source();
destination()->enableInput(source->deviceId());
provider = destination()->localAudioInputProvider();
} else {
// FIXME: get a provider for non-local MediaStreams (like from a remote peer).
provider = 0;
}
RefPtr<MediaStreamAudioSourceNode> node = MediaStreamAudioSourceNode::create(this, mediaStream, provider);
// FIXME: Only stereo streams are supported right now. We should be able to accept multi-channel streams.
node->setFormat(2, sampleRate());
refNode(node.get()); // context keeps reference until node is disconnected
return node;
}
MediaStream::MediaStream(ExecutionContext* context,
const MediaStreamTrackVector& audioTracks,
const MediaStreamTrackVector& videoTracks)
: m_scheduledEventTimer(this, &MediaStream::scheduledEventTimerFired),
m_executionContext(context) {
MediaStreamComponentVector audioComponents;
MediaStreamComponentVector videoComponents;
MediaStreamTrackVector::const_iterator iter;
for (iter = audioTracks.begin(); iter != audioTracks.end(); ++iter) {
(*iter)->registerMediaStream(this);
audioComponents.append((*iter)->component());
}
for (iter = videoTracks.begin(); iter != videoTracks.end(); ++iter) {
(*iter)->registerMediaStream(this);
videoComponents.append((*iter)->component());
}
m_descriptor =
MediaStreamDescriptor::create(audioComponents, videoComponents);
m_descriptor->setClient(this);
MediaStreamCenter::instance().didCreateMediaStream(m_descriptor);
m_audioTracks = audioTracks;
m_videoTracks = videoTracks;
if (emptyOrOnlyEndedTracks()) {
m_descriptor->setActive(false);
}
}
void MediaStream::removeRemoteTrack(MediaStreamComponent* component)
{
if (ended())
return;
MediaStreamTrackVector* tracks = 0;
switch (component->source()->type()) {
case MediaStreamSource::TypeAudio:
tracks = &m_audioTracks;
break;
case MediaStreamSource::TypeVideo:
tracks = &m_videoTracks;
break;
}
size_t index = notFound;
for (size_t i = 0; i < tracks->size(); ++i) {
if ((*tracks)[i]->component() == component) {
index = i;
break;
}
}
if (index == notFound)
return;
RefPtr<MediaStreamTrack> track = (*tracks)[index];
tracks->remove(index);
scheduleDispatchEvent(MediaStreamTrackEvent::create(eventNames().removetrackEvent, false, false, track));
}
void MediaStream::removeRemoteSource(MediaStreamSource* source)
{
if (ended())
return;
MediaStreamTrackVector* tracks = 0;
switch (source->type()) {
case MediaStreamSource::Audio:
tracks = &m_audioTracks;
break;
case MediaStreamSource::Video:
tracks = &m_videoTracks;
break;
}
size_t index = notFound;
for (size_t i = 0; i < tracks->size(); ++i) {
if ((*tracks)[i]->source() == source) {
index = i;
break;
}
}
if (index == notFound)
return;
m_descriptor->removeSource(source);
RefPtr<MediaStreamTrack> track = (*tracks)[index];
tracks->remove(index);
scheduleDispatchEvent(MediaStreamTrackEvent::create(eventNames().removetrackEvent, false, false, track));
}
MediaStreamAudioSourceNode* AudioContext::createMediaStreamSource(MediaStream* mediaStream, ExceptionState& exceptionState)
{
ASSERT(isMainThread());
if (isContextClosed()) {
throwExceptionForClosedState(exceptionState);
return nullptr;
}
if (!mediaStream) {
exceptionState.throwDOMException(
InvalidStateError,
"invalid MediaStream source");
return nullptr;
}
MediaStreamTrackVector audioTracks = mediaStream->getAudioTracks();
if (audioTracks.isEmpty()) {
exceptionState.throwDOMException(
InvalidStateError,
"MediaStream has no audio track");
return nullptr;
}
// Use the first audio track in the media stream.
MediaStreamTrack* audioTrack = audioTracks[0];
OwnPtr<AudioSourceProvider> provider = audioTrack->createWebAudioSource();
MediaStreamAudioSourceNode* node = MediaStreamAudioSourceNode::create(this, mediaStream, audioTrack, provider.release());
// FIXME: Only stereo streams are supported right now. We should be able to accept multi-channel streams.
node->mediaStreamAudioSourceHandler().setFormat(2, sampleRate());
refNode(node); // context keeps reference until node is disconnected
return node;
}
MediaStreamTrackVector MediaStream::getTracks() const
{
MediaStreamTrackVector tracks;
tracks.reserveCapacity(m_trackSet.size());
copyValuesToVector(m_trackSet, tracks);
return tracks;
}
MediaStream* MediaStream::clone(ExecutionContext* context)
{
MediaStreamTrackVector tracks;
for (MediaStreamTrackVector::iterator iter = m_audioTracks.begin(); iter != m_audioTracks.end(); ++iter)
tracks.append((*iter)->clone(context));
for (MediaStreamTrackVector::iterator iter = m_videoTracks.begin(); iter != m_videoTracks.end(); ++iter)
tracks.append((*iter)->clone(context));
return MediaStream::create(context, tracks);
}
MediaStreamTrackVector MediaStream::getTracks()
{
MediaStreamTrackVector tracks;
for (MediaStreamTrackVector::iterator iter = m_audioTracks.begin(); iter != m_audioTracks.end(); ++iter)
tracks.append(iter->get());
for (MediaStreamTrackVector::iterator iter = m_videoTracks.begin(); iter != m_videoTracks.end(); ++iter)
tracks.append(iter->get());
return tracks;
}
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;
}
RefPtr<MediaStream> MediaStream::clone()
{
MediaStreamTrackVector clonedTracks;
clonedTracks.reserveCapacity(m_trackSet.size());
for (auto& track : m_trackSet.values())
clonedTracks.append(track->clone());
return MediaStream::create(*scriptExecutionContext(), clonedTracks);
}
void UserMediaRequest::callSuccessHandler(PassRefPtr<MediaStreamDescriptor> streamDescriptor)
{
// 4 - Create the MediaStream and pass it to the success callback.
ASSERT(m_successCallback);
RefPtr<MediaStream> stream = MediaStream::create(m_scriptExecutionContext, streamDescriptor);
MediaStreamTrackVector tracks = stream->getAudioTracks();
for (MediaStreamTrackVector::iterator iter = tracks.begin(); iter != tracks.end(); ++iter)
(*iter)->source()->setConstraints(m_audioConstraints);
tracks = stream->getVideoTracks();
for (MediaStreamTrackVector::iterator iter = tracks.begin(); iter != tracks.end(); ++iter)
(*iter)->source()->setConstraints(m_videoConstraints);
m_successCallback->handleEvent(stream.get());
}
static bool containsSource(MediaStreamTrackVector& trackVector,
MediaStreamSource* source) {
for (size_t i = 0; i < trackVector.size(); ++i) {
if (source->id() == trackVector[i]->component()->source()->id())
return true;
}
return false;
}
static void processTrack(MediaStreamTrack* track,
MediaStreamTrackVector& trackVector) {
if (track->ended())
return;
MediaStreamSource* source = track->component()->source();
if (!containsSource(trackVector, source))
trackVector.append(track);
}
PassRefPtr<MediaStream> MediaStream::create(ScriptExecutionContext* context, const MediaStreamTrackVector& tracks)
{
MediaStreamSourceVector audioSources;
MediaStreamSourceVector videoSources;
for (size_t i = 0; i < tracks.size(); ++i)
processTrack(tracks[i].get(), tracks[i]->kind() == "audio" ? audioSources : videoSources);
return createFromSourceVectors(context, audioSources, videoSources);
}
MediaStream* HTMLCanvasElementCapture::captureStream(
HTMLCanvasElement& element,
bool givenFrameRate,
double frameRate,
ExceptionState& exceptionState) {
if (!element.originClean()) {
exceptionState.throwSecurityError("Canvas is not origin-clean.");
return nullptr;
}
WebMediaStreamTrack track;
const WebSize size(element.width(), element.height());
std::unique_ptr<WebCanvasCaptureHandler> handler;
if (givenFrameRate)
handler = wrapUnique(Platform::current()->createCanvasCaptureHandler(
size, frameRate, &track));
else
handler = wrapUnique(Platform::current()->createCanvasCaptureHandler(
size, kDefaultFrameRate, &track));
if (!handler) {
exceptionState.throwDOMException(
NotSupportedError, "No CanvasCapture handler can be created.");
return nullptr;
}
CanvasCaptureMediaStreamTrack* canvasTrack;
if (givenFrameRate)
canvasTrack = CanvasCaptureMediaStreamTrack::create(
track, &element, std::move(handler), frameRate);
else
canvasTrack = CanvasCaptureMediaStreamTrack::create(track, &element,
std::move(handler));
// We want to capture a frame in the beginning.
canvasTrack->requestFrame();
MediaStreamTrackVector tracks;
tracks.append(canvasTrack);
return MediaStream::create(element.getExecutionContext(), tracks);
}
void MediaStream::removeRemoteTrack(MediaStreamComponent* component) {
DCHECK(component);
if (m_executionContext->isContextDestroyed())
return;
MediaStreamTrackVector* tracks = 0;
switch (component->source()->type()) {
case MediaStreamSource::TypeAudio:
tracks = &m_audioTracks;
break;
case MediaStreamSource::TypeVideo:
tracks = &m_videoTracks;
break;
}
size_t index = kNotFound;
for (size_t i = 0; i < tracks->size(); ++i) {
if ((*tracks)[i]->component() == component) {
index = i;
break;
}
}
if (index == kNotFound)
return;
m_descriptor->removeComponent(component);
MediaStreamTrack* track = (*tracks)[index];
track->unregisterMediaStream(this);
tracks->remove(index);
scheduleDispatchEvent(
MediaStreamTrackEvent::create(EventTypeNames::removetrack, track));
if (active() && emptyOrOnlyEndedTracks()) {
m_descriptor->setActive(false);
scheduleDispatchEvent(Event::create(EventTypeNames::inactive));
}
}
MediaStream::MediaStream(ScriptExecutionContext& context, const MediaStreamTrackVector& tracks)
: ContextDestructionObserver(&context)
, m_activityEventTimer(*this, &MediaStream::activityEventTimerFired)
{
// This constructor preserves MediaStreamTrack instances and must be used by calls originating
// from the JavaScript MediaStream constructor.
MediaStreamTrackPrivateVector trackPrivates;
trackPrivates.reserveCapacity(tracks.size());
for (auto& track : tracks) {
track->addObserver(this);
m_trackSet.add(track->id(), track);
trackPrivates.append(&track->privateTrack());
}
m_private = MediaStreamPrivate::create(trackPrivates);
setIsActive(m_private->active());
m_private->addObserver(*this);
MediaStreamRegistry::shared().registerStream(*this);
}
void UserMediaRequest::succeed(PassRefPtr<MediaStreamDescriptor> streamDescriptor)
{
if (!executionContext())
return;
RefPtrWillBeRawPtr<MediaStream> stream = MediaStream::create(executionContext(), streamDescriptor);
MediaStreamTrackVector audioTracks = stream->getAudioTracks();
for (MediaStreamTrackVector::iterator iter = audioTracks.begin(); iter != audioTracks.end(); ++iter) {
(*iter)->component()->source()->setConstraints(m_audio);
}
MediaStreamTrackVector videoTracks = stream->getVideoTracks();
for (MediaStreamTrackVector::iterator iter = videoTracks.begin(); iter != videoTracks.end(); ++iter) {
(*iter)->component()->source()->setConstraints(m_video);
}
m_successCallback->handleEvent(stream.get());
}
