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gecko-dev/dom/media/MediaRecorder.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaRecorder.h"
#include "AudioNodeEngine.h"
#include "AudioNodeStream.h"
#include "DOMMediaStream.h"
#include "EncodedBufferCache.h"
#include "MediaDecoder.h"
#include "MediaEncoder.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/AudioStreamTrack.h"
#include "mozilla/dom/BlobEvent.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/RecordErrorEvent.h"
#include "mozilla/dom/VideoStreamTrack.h"
#include "nsAutoPtr.h"
#include "nsContentUtils.h"
#include "nsError.h"
#include "nsIDocument.h"
#include "nsIPermissionManager.h"
#include "nsIPrincipal.h"
#include "nsIScriptError.h"
#include "nsMimeTypes.h"
#include "nsProxyRelease.h"
#include "nsTArray.h"
#include "GeckoProfiler.h"
#include "nsContentTypeParser.h"
#include "nsCharSeparatedTokenizer.h"
#ifdef LOG
#undef LOG
#endif
mozilla::LazyLogModule gMediaRecorderLog("MediaRecorder");
#define LOG(type, msg) MOZ_LOG(gMediaRecorderLog, type, msg)
namespace mozilla {
namespace dom {
/**
+ * MediaRecorderReporter measures memory being used by the Media Recorder.
+ *
+ * It is a singleton reporter and the single class object lives as long as at
+ * least one Recorder is registered. In MediaRecorder, the reporter is unregistered
+ * when it is destroyed.
+ */
class MediaRecorderReporter final : public nsIMemoryReporter
{
public:
NS_DECL_THREADSAFE_ISUPPORTS
MediaRecorderReporter() {};
static MediaRecorderReporter* UniqueInstance();
void InitMemoryReporter();
static void AddMediaRecorder(MediaRecorder *aRecorder)
{
GetRecorders().AppendElement(aRecorder);
}
static void RemoveMediaRecorder(MediaRecorder *aRecorder)
{
RecordersArray& recorders = GetRecorders();
recorders.RemoveElement(aRecorder);
if (recorders.IsEmpty()) {
sUniqueInstance = nullptr;
}
}
NS_IMETHOD
CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override
{
int64_t amount = 0;
RecordersArray& recorders = GetRecorders();
for (size_t i = 0; i < recorders.Length(); ++i) {
amount += recorders[i]->SizeOfExcludingThis(MallocSizeOf);
}
MOZ_COLLECT_REPORT(
"explicit/media/recorder", KIND_HEAP, UNITS_BYTES, amount,
"Memory used by media recorder.");
return NS_OK;
}
private:
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
virtual ~MediaRecorderReporter();
static StaticRefPtr<MediaRecorderReporter> sUniqueInstance;
typedef nsTArray<MediaRecorder*> RecordersArray;
static RecordersArray& GetRecorders()
{
return UniqueInstance()->mRecorders;
}
RecordersArray mRecorders;
};
NS_IMPL_ISUPPORTS(MediaRecorderReporter, nsIMemoryReporter);
NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaRecorder, DOMEventTargetHelper,
mDOMStream, mAudioNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(MediaRecorder)
NS_INTERFACE_MAP_ENTRY(nsIDocumentActivity)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(MediaRecorder, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(MediaRecorder, DOMEventTargetHelper)
/**
* Session is an object to represent a single recording event.
* In original design, all recording context is stored in MediaRecorder, which causes
* a problem if someone calls MediaRecoder::Stop and MedaiRecorder::Start quickly.
* To prevent blocking main thread, media encoding is executed in a second thread,
* named as Read Thread. For the same reason, we do not wait Read Thread shutdown in
* MediaRecorder::Stop. If someone call MediaRecoder::Start before Read Thread shutdown,
* the same recording context in MediaRecoder might be access by two Reading Threads,
* which cause a problem.
* In the new design, we put recording context into Session object, including Read
* Thread. Each Session has its own recording context and Read Thread, problem is been
* resolved.
*
* Life cycle of a Session object.
* 1) Initialization Stage (in main thread)
* Setup media streams in MSG, and bind MediaEncoder with Source Stream when mStream is available.
* Resource allocation, such as encoded data cache buffer and MediaEncoder.
* Create read thread.
* Automatically switch to Extract stage in the end of this stage.
* 2) Extract Stage (in Read Thread)
* Pull encoded A/V frames from MediaEncoder, dispatch to OnDataAvailable handler.
* Unless a client calls Session::Stop, Session object keeps stay in this stage.
* 3) Destroy Stage (in main thread)
* Switch from Extract stage to Destroy stage by calling Session::Stop.
* Release session resource and remove associated streams from MSG.
*
* Lifetime of MediaRecorder and Session objects.
* 1) MediaRecorder creates a Session in MediaRecorder::Start function and holds
* a reference to Session. Then the Session registers itself to
* ShutdownObserver and also holds a reference to MediaRecorder.
* Therefore, the reference dependency in gecko is:
* ShutdownObserver -> Session <-> MediaRecorder, note that there is a cycle
* reference between Session and MediaRecorder.
* 2) A Session is destroyed in DestroyRunnable after MediaRecorder::Stop being called
* _and_ all encoded media data been passed to OnDataAvailable handler.
* 3) MediaRecorder::Stop is called by user or the document is going to
* inactive or invisible.
*/
class MediaRecorder::Session: public nsIObserver,
public PrincipalChangeObserver<MediaStreamTrack>,
public DOMMediaStream::TrackListener
{
NS_DECL_THREADSAFE_ISUPPORTS
// Main thread task.
// Create a blob event and send back to client.
class PushBlobRunnable : public Runnable
{
public:
explicit PushBlobRunnable(Session* aSession)
: mSession(aSession)
{ }
NS_IMETHOD Run() override
{
LOG(LogLevel::Debug, ("Session.PushBlobRunnable s=(%p)", mSession.get()));
MOZ_ASSERT(NS_IsMainThread());
RefPtr<MediaRecorder> recorder = mSession->mRecorder;
if (!recorder) {
return NS_OK;
}
nsresult rv = recorder->CreateAndDispatchBlobEvent(mSession->GetEncodedData());
if (NS_FAILED(rv)) {
recorder->NotifyError(rv);
}
return NS_OK;
}
private:
RefPtr<Session> mSession;
};
// Notify encoder error, run in main thread task. (Bug 1095381)
class EncoderErrorNotifierRunnable : public Runnable
{
public:
explicit EncoderErrorNotifierRunnable(Session* aSession)
: mSession(aSession)
{ }
NS_IMETHOD Run() override
{
LOG(LogLevel::Debug, ("Session.ErrorNotifyRunnable s=(%p)", mSession.get()));
MOZ_ASSERT(NS_IsMainThread());
RefPtr<MediaRecorder> recorder = mSession->mRecorder;
if (!recorder) {
return NS_OK;
}
if (mSession->IsEncoderError()) {
recorder->NotifyError(NS_ERROR_UNEXPECTED);
}
return NS_OK;
}
private:
RefPtr<Session> mSession;
};
// Fire start event and set mimeType, run in main thread task.
class DispatchStartEventRunnable : public Runnable
{
public:
DispatchStartEventRunnable(Session* aSession, const nsAString & aEventName)
: mSession(aSession)
, mEventName(aEventName)
{ }
NS_IMETHOD Run() override
{
LOG(LogLevel::Debug, ("Session.DispatchStartEventRunnable s=(%p)", mSession.get()));
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_TRUE(mSession->mRecorder, NS_OK);
RefPtr<MediaRecorder> recorder = mSession->mRecorder;
recorder->SetMimeType(mSession->mMimeType);
recorder->DispatchSimpleEvent(mEventName);
return NS_OK;
}
private:
RefPtr<Session> mSession;
nsString mEventName;
};
// Record thread task and it run in Media Encoder thread.
// Fetch encoded Audio/Video data from MediaEncoder.
class ExtractRunnable : public Runnable
{
public:
explicit ExtractRunnable(Session* aSession)
: mSession(aSession) {}
~ExtractRunnable()
{}
NS_IMETHOD Run() override
{
MOZ_ASSERT(NS_GetCurrentThread() == mSession->mReadThread);
LOG(LogLevel::Debug, ("Session.ExtractRunnable shutdown = %d", mSession->mEncoder->IsShutdown()));
if (!mSession->mEncoder->IsShutdown()) {
mSession->Extract(false);
nsCOMPtr<nsIRunnable> event = new ExtractRunnable(mSession);
if (NS_FAILED(NS_DispatchToCurrentThread(event))) {
NS_WARNING("Failed to dispatch ExtractRunnable to encoder thread");
}
} else {
// Flush out remaining encoded data.
mSession->Extract(true);
if (mSession->mIsRegisterProfiler)
profiler_unregister_thread();
if (NS_FAILED(NS_DispatchToMainThread(
new DestroyRunnable(mSession)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread DestroyRunnable failed");
}
}
return NS_OK;
}
private:
RefPtr<Session> mSession;
};
// For Ensure recorder has tracks to record.
class TracksAvailableCallback : public OnTracksAvailableCallback
{
public:
explicit TracksAvailableCallback(Session *aSession, TrackRate aTrackRate)
: mSession(aSession)
, mTrackRate(aTrackRate) {}
virtual void NotifyTracksAvailable(DOMMediaStream* aStream)
{
if (mSession->mStopIssued) {
return;
}
MOZ_RELEASE_ASSERT(aStream);
mSession->MediaStreamReady(*aStream);
uint8_t trackTypes = 0;
nsTArray<RefPtr<mozilla::dom::AudioStreamTrack>> audioTracks;
aStream->GetAudioTracks(audioTracks);
if (!audioTracks.IsEmpty()) {
trackTypes |= ContainerWriter::CREATE_AUDIO_TRACK;
mSession->ConnectMediaStreamTrack(*audioTracks[0]);
}
nsTArray<RefPtr<mozilla::dom::VideoStreamTrack>> videoTracks;
aStream->GetVideoTracks(videoTracks);
if (!videoTracks.IsEmpty()) {
trackTypes |= ContainerWriter::CREATE_VIDEO_TRACK;
mSession->ConnectMediaStreamTrack(*videoTracks[0]);
}
if (audioTracks.Length() > 1 ||
videoTracks.Length() > 1) {
// When MediaRecorder supports multiple tracks, we should set up a single
// MediaInputPort from the input stream, and let main thread check
// track principals async later.
nsPIDOMWindowInner* window = mSession->mRecorder->GetParentObject();
nsIDocument* document = window ? window->GetExtantDoc() : nullptr;
nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
NS_LITERAL_CSTRING("Media"),
document,
nsContentUtils::eDOM_PROPERTIES,
"MediaRecorderMultiTracksNotSupported");
mSession->DoSessionEndTask(NS_ERROR_ABORT);
return;
}
NS_ASSERTION(trackTypes != 0, "TracksAvailableCallback without any tracks available");
// Check that we may access the tracks' content.
if (!mSession->MediaStreamTracksPrincipalSubsumes()) {
LOG(LogLevel::Warning, ("Session.NotifyTracksAvailable MediaStreamTracks principal check failed"));
mSession->DoSessionEndTask(NS_ERROR_DOM_SECURITY_ERR);
return;
}
LOG(LogLevel::Debug, ("Session.NotifyTracksAvailable track type = (%d)", trackTypes));
mSession->InitEncoder(trackTypes, mTrackRate);
}
private:
RefPtr<Session> mSession;
TrackRate mTrackRate;
};
// Main thread task.
// To delete RecordingSession object.
class DestroyRunnable : public Runnable
{
public:
explicit DestroyRunnable(Session* aSession)
: mSession(aSession) {}
NS_IMETHOD Run() override
{
LOG(LogLevel::Debug, ("Session.DestroyRunnable session refcnt = (%d) stopIssued %d s=(%p)",
(int)mSession->mRefCnt, mSession->mStopIssued, mSession.get()));
MOZ_ASSERT(NS_IsMainThread() && mSession);
RefPtr<MediaRecorder> recorder = mSession->mRecorder;
if (!recorder) {
return NS_OK;
}
// SourceMediaStream is ended, and send out TRACK_EVENT_END notification.
// Read Thread will be terminate soon.
// We need to switch MediaRecorder to "Stop" state first to make sure
// MediaRecorder is not associated with this Session anymore, then, it's
// safe to delete this Session.
// Also avoid to run if this session already call stop before
if (!mSession->mStopIssued) {
ErrorResult result;
mSession->mStopIssued = true;
recorder->Stop(result);
if (NS_FAILED(NS_DispatchToMainThread(new DestroyRunnable(mSession)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread failed");
}
return NS_OK;
}
// Dispatch stop event and clear MIME type.
mSession->mMimeType = NS_LITERAL_STRING("");
recorder->SetMimeType(mSession->mMimeType);
recorder->DispatchSimpleEvent(NS_LITERAL_STRING("stop"));
mSession->BreakCycle();
return NS_OK;
}
private:
// Call mSession::Release automatically while DestroyRunnable be destroy.
RefPtr<Session> mSession;
};
friend class EncoderErrorNotifierRunnable;
friend class PushBlobRunnable;
friend class ExtractRunnable;
friend class DestroyRunnable;
friend class TracksAvailableCallback;
public:
Session(MediaRecorder* aRecorder, int32_t aTimeSlice)
: mRecorder(aRecorder)
, mTimeSlice(aTimeSlice)
, mStopIssued(false)
, mIsStartEventFired(false)
, mIsRegisterProfiler(false)
, mNeedSessionEndTask(true)
, mSelectedVideoTrackID(TRACK_NONE)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_COUNT_CTOR(MediaRecorder::Session);
uint32_t maxMem = Preferences::GetUint("media.recorder.max_memory",
MAX_ALLOW_MEMORY_BUFFER);
mEncodedBufferCache = new EncodedBufferCache(maxMem);
mLastBlobTimeStamp = TimeStamp::Now();
}
void PrincipalChanged(MediaStreamTrack* aTrack) override
{
NS_ASSERTION(mMediaStreamTracks.Contains(aTrack),
"Principal changed for unrecorded track");
if (!MediaStreamTracksPrincipalSubsumes()) {
DoSessionEndTask(NS_ERROR_DOM_SECURITY_ERR);
}
}
void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) override
{
LOG(LogLevel::Warning, ("Session.NotifyTrackAdded %p Raising error due to track set change", this));
DoSessionEndTask(NS_ERROR_ABORT);
}
void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) override
{
RefPtr<MediaInputPort> foundInputPort;
for (RefPtr<MediaInputPort> inputPort : mInputPorts) {
if (aTrack->IsForwardedThrough(inputPort)) {
foundInputPort = inputPort;
break;
}
}
if (foundInputPort) {
// A recorded track was removed or ended. End it in the recording.
// Don't raise an error.
foundInputPort->Destroy();
DebugOnly<bool> removed = mInputPorts.RemoveElement(foundInputPort);
MOZ_ASSERT(removed);
return;
}
LOG(LogLevel::Warning, ("Session.NotifyTrackRemoved %p Raising error due to track set change", this));
DoSessionEndTask(NS_ERROR_ABORT);
}
void Start()
{
LOG(LogLevel::Debug, ("Session.Start %p", this));
MOZ_ASSERT(NS_IsMainThread());
// Create a Track Union Stream
MediaStreamGraph* gm = mRecorder->GetSourceMediaStream()->Graph();
TrackRate trackRate = gm->GraphRate();
mTrackUnionStream = gm->CreateTrackUnionStream();
MOZ_ASSERT(mTrackUnionStream, "CreateTrackUnionStream failed");
mTrackUnionStream->SetAutofinish(true);
DOMMediaStream* domStream = mRecorder->Stream();
if (domStream) {
// Get the available tracks from the DOMMediaStream.
// The callback will report back tracks that we have to connect to
// mTrackUnionStream and listen to principal changes on.
TracksAvailableCallback* tracksAvailableCallback = new TracksAvailableCallback(this, trackRate);
domStream->OnTracksAvailable(tracksAvailableCallback);
} else {
// Check that we may access the audio node's content.
if (!AudioNodePrincipalSubsumes()) {
LOG(LogLevel::Warning, ("Session.Start AudioNode principal check failed"));
DoSessionEndTask(NS_ERROR_DOM_SECURITY_ERR);
return;
}
// Bind this Track Union Stream with Source Media.
RefPtr<MediaInputPort> inputPort =
mTrackUnionStream->AllocateInputPort(mRecorder->GetSourceMediaStream());
mInputPorts.AppendElement(inputPort.forget());
MOZ_ASSERT(mInputPorts[mInputPorts.Length()-1]);
// Web Audio node has only audio.
InitEncoder(ContainerWriter::CREATE_AUDIO_TRACK, trackRate);
}
}
void Stop()
{
LOG(LogLevel::Debug, ("Session.Stop %p", this));
MOZ_ASSERT(NS_IsMainThread());
mStopIssued = true;
CleanupStreams();
if (mNeedSessionEndTask) {
LOG(LogLevel::Debug, ("Session.Stop mNeedSessionEndTask %p", this));
// End the Session directly if there is no ExtractRunnable.
DoSessionEndTask(NS_OK);
}
}
nsresult Pause()
{
LOG(LogLevel::Debug, ("Session.Pause"));
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_TRUE(mTrackUnionStream, NS_ERROR_FAILURE);
mTrackUnionStream->Suspend();
if (mEncoder) {
mEncoder->Suspend();
}
return NS_OK;
}
nsresult Resume()
{
LOG(LogLevel::Debug, ("Session.Resume"));
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_TRUE(mTrackUnionStream, NS_ERROR_FAILURE);
if (mEncoder) {
mEncoder->Resume();
}
mTrackUnionStream->Resume();
return NS_OK;
}
nsresult RequestData()
{
LOG(LogLevel::Debug, ("Session.RequestData"));
MOZ_ASSERT(NS_IsMainThread());
if (NS_FAILED(NS_DispatchToMainThread(new EncoderErrorNotifierRunnable(this))) ||
NS_FAILED(NS_DispatchToMainThread(new PushBlobRunnable(this)))) {
MOZ_ASSERT(false, "RequestData NS_DispatchToMainThread failed");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
already_AddRefed<nsIDOMBlob> GetEncodedData()
{
MOZ_ASSERT(NS_IsMainThread());
return mEncodedBufferCache->ExtractBlob(mRecorder->GetParentObject(),
mMimeType);
}
bool IsEncoderError()
{
if (mEncoder && mEncoder->HasError()) {
return true;
}
return false;
}
size_t
SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
return (mEncoder ? mEncoder->SizeOfExcludingThis(aMallocSizeOf) : 0);
}
private:
// Only DestroyRunnable is allowed to delete Session object.
virtual ~Session()
{
MOZ_COUNT_DTOR(MediaRecorder::Session);
LOG(LogLevel::Debug, ("Session.~Session (%p)", this));
CleanupStreams();
if (mReadThread) {
mReadThread->Shutdown();
mReadThread = nullptr;
// Inside the if() so that if we delete after xpcom-shutdown's Observe(), we
// won't try to remove it after the observer service is shut down.
nsContentUtils::UnregisterShutdownObserver(this);
}
}
// Pull encoded media data from MediaEncoder and put into EncodedBufferCache.
// Destroy this session object in the end of this function.
// If the bool aForceFlush is true, we will force to dispatch a
// PushBlobRunnable to main thread.
void Extract(bool aForceFlush)
{
MOZ_ASSERT(NS_GetCurrentThread() == mReadThread);
LOG(LogLevel::Debug, ("Session.Extract %p", this));
if (!mIsRegisterProfiler) {
char aLocal;
profiler_register_thread("Media_Encoder", &aLocal);
mIsRegisterProfiler = true;
}
PROFILER_LABEL("MediaRecorder", "Session Extract",
js::ProfileEntry::Category::OTHER);
// Pull encoded media data from MediaEncoder
nsTArray<nsTArray<uint8_t> > encodedBuf;
mEncoder->GetEncodedData(&encodedBuf, mMimeType);
// Append pulled data into cache buffer.
for (uint32_t i = 0; i < encodedBuf.Length(); i++) {
if (!encodedBuf[i].IsEmpty()) {
mEncodedBufferCache->AppendBuffer(encodedBuf[i]);
// Fire the start event when encoded data is available.
if (!mIsStartEventFired) {
NS_DispatchToMainThread(
new DispatchStartEventRunnable(this, NS_LITERAL_STRING("start")));
mIsStartEventFired = true;
}
}
}
// Whether push encoded data back to onDataAvailable automatically or we
// need a flush.
bool pushBlob = false;
if ((mTimeSlice > 0) &&
((TimeStamp::Now()-mLastBlobTimeStamp).ToMilliseconds() > mTimeSlice)) {
pushBlob = true;
}
if (pushBlob || aForceFlush) {
// Fire the start event before the blob.
if (!mIsStartEventFired) {
NS_DispatchToMainThread(
new DispatchStartEventRunnable(this, NS_LITERAL_STRING("start")));
mIsStartEventFired = true;
}
if (NS_FAILED(NS_DispatchToMainThread(new EncoderErrorNotifierRunnable(this)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread EncoderErrorNotifierRunnable failed");
}
if (NS_FAILED(NS_DispatchToMainThread(new PushBlobRunnable(this)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread PushBlobRunnable failed");
} else {
mLastBlobTimeStamp = TimeStamp::Now();
}
}
}
void MediaStreamReady(DOMMediaStream& aStream) {
mMediaStream = &aStream;
aStream.RegisterTrackListener(this);
}
void ConnectMediaStreamTrack(MediaStreamTrack& aTrack)
{
mMediaStreamTracks.AppendElement(&aTrack);
aTrack.AddPrincipalChangeObserver(this);
RefPtr<MediaInputPort> inputPort =
aTrack.ForwardTrackContentsTo(mTrackUnionStream);
MOZ_ASSERT(inputPort);
mInputPorts.AppendElement(inputPort.forget());
MOZ_ASSERT(mInputPorts[mInputPorts.Length()-1]);
}
bool PrincipalSubsumes(nsIPrincipal* aPrincipal)
{
if (!mRecorder->GetOwner())
return false;
nsCOMPtr<nsIDocument> doc = mRecorder->GetOwner()->GetExtantDoc();
if (!doc) {
return false;
}
if (!aPrincipal) {
return false;
}
bool subsumes;
if (NS_FAILED(doc->NodePrincipal()->Subsumes(aPrincipal, &subsumes))) {
return false;
}
return subsumes;
}
bool MediaStreamTracksPrincipalSubsumes()
{
MOZ_ASSERT(mRecorder->mDOMStream);
nsCOMPtr<nsIPrincipal> principal = nullptr;
for (RefPtr<MediaStreamTrack>& track : mMediaStreamTracks) {
nsContentUtils::CombineResourcePrincipals(&principal, track->GetPrincipal());
}
return PrincipalSubsumes(principal);
}
bool AudioNodePrincipalSubsumes()
{
MOZ_ASSERT(mRecorder->mAudioNode != nullptr);
nsIDocument* doc = mRecorder->mAudioNode->GetOwner()
? mRecorder->mAudioNode->GetOwner()->GetExtantDoc()
: nullptr;
nsCOMPtr<nsIPrincipal> principal = doc ? doc->NodePrincipal() : nullptr;
return PrincipalSubsumes(principal);
}
bool CheckPermission(const char* aType)
{
if (!mRecorder || !mRecorder->GetOwner()) {
return false;
}
nsCOMPtr<nsIDocument> doc = mRecorder->GetOwner()->GetExtantDoc();
if (!doc) {
return false;
}
// Certified applications can always assign AUDIO_3GPP
if (doc->NodePrincipal()->GetAppStatus() ==
nsIPrincipal::APP_STATUS_CERTIFIED) {
return true;
}
nsCOMPtr<nsIPermissionManager> pm =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
if (!pm) {
return false;
}
uint32_t perm = nsIPermissionManager::DENY_ACTION;
pm->TestExactPermissionFromPrincipal(doc->NodePrincipal(), aType, &perm);
return perm == nsIPermissionManager::ALLOW_ACTION;
}
void InitEncoder(uint8_t aTrackTypes, TrackRate aTrackRate)
{
LOG(LogLevel::Debug, ("Session.InitEncoder %p", this));
MOZ_ASSERT(NS_IsMainThread());
if (!mRecorder) {
LOG(LogLevel::Debug, ("Session.InitEncoder failure, mRecorder is null %p", this));
return;
}
// Allocate encoder and bind with union stream.
// At this stage, the API doesn't allow UA to choose the output mimeType format.
// Make sure the application has permission to assign AUDIO_3GPP
if (mRecorder->mMimeType.EqualsLiteral(AUDIO_3GPP) && CheckPermission("audio-capture:3gpp")) {
mEncoder = MediaEncoder::CreateEncoder(NS_LITERAL_STRING(AUDIO_3GPP),
mRecorder->GetAudioBitrate(),
mRecorder->GetVideoBitrate(),
mRecorder->GetBitrate(),
aTrackTypes, aTrackRate);
} else if (mRecorder->mMimeType.EqualsLiteral(AUDIO_3GPP2) && CheckPermission("audio-capture:3gpp2")) {
mEncoder = MediaEncoder::CreateEncoder(NS_LITERAL_STRING(AUDIO_3GPP2),
mRecorder->GetAudioBitrate(),
mRecorder->GetVideoBitrate(),
mRecorder->GetBitrate(),
aTrackTypes, aTrackRate);
} else {
mEncoder = MediaEncoder::CreateEncoder(NS_LITERAL_STRING(""),
mRecorder->GetAudioBitrate(),
mRecorder->GetVideoBitrate(),
mRecorder->GetBitrate(),
aTrackTypes, aTrackRate);
}
if (!mEncoder) {
LOG(LogLevel::Debug, ("Session.InitEncoder !mEncoder %p", this));
DoSessionEndTask(NS_ERROR_ABORT);
return;
}
// Media stream is ready but UA issues a stop method follow by start method.
// The Session::stop would clean the mTrackUnionStream. If the AfterTracksAdded
// comes after stop command, this function would crash.
if (!mTrackUnionStream) {
LOG(LogLevel::Debug, ("Session.InitEncoder !mTrackUnionStream %p", this));
DoSessionEndTask(NS_OK);
return;
}
mTrackUnionStream->AddListener(mEncoder.get());
nsTArray<RefPtr<mozilla::dom::VideoStreamTrack>> videoTracks;
DOMMediaStream* domStream = mRecorder->Stream();
if (domStream) {
domStream->GetVideoTracks(videoTracks);
if (!videoTracks.IsEmpty()) {
// Right now, the MediaRecorder hasn't dealt with multiple video track
// issues. So we just bind with the first video track. Bug 1276928 is
// the following.
videoTracks[0]->AddDirectListener(mEncoder->GetVideoSink());
}
}
// Try to use direct listeners if possible
if (domStream && domStream->GetInputStream()) {
mInputStream = domStream->GetInputStream()->AsSourceStream();
if (mInputStream) {
mInputStream->AddDirectListener(mEncoder.get());
mEncoder->SetDirectConnect(true);
}
}
// Create a thread to read encode media data from MediaEncoder.
if (!mReadThread) {
nsresult rv = NS_NewNamedThread("Media_Encoder", getter_AddRefs(mReadThread));
if (NS_FAILED(rv)) {
LOG(LogLevel::Debug, ("Session.InitEncoder !mReadThread %p", this));
DoSessionEndTask(rv);
return;
}
}
// In case source media stream does not notify track end, receive
// shutdown notification and stop Read Thread.
nsContentUtils::RegisterShutdownObserver(this);
nsCOMPtr<nsIRunnable> event = new ExtractRunnable(this);
if (NS_FAILED(mReadThread->Dispatch(event, NS_DISPATCH_NORMAL))) {
NS_WARNING("Failed to dispatch ExtractRunnable at beginning");
LOG(LogLevel::Debug, ("Session.InitEncoder !ReadThread->Dispatch %p", this));
DoSessionEndTask(NS_ERROR_ABORT);
}
// Set mNeedSessionEndTask to false because the
// ExtractRunnable/DestroyRunnable will take the response to
// end the session.
mNeedSessionEndTask = false;
}
// application should get blob and onstop event
void DoSessionEndTask(nsresult rv)
{
MOZ_ASSERT(NS_IsMainThread());
CleanupStreams();
NS_DispatchToMainThread(
new DispatchStartEventRunnable(this, NS_LITERAL_STRING("start")));
if (NS_FAILED(rv)) {
NS_DispatchToMainThread(NewRunnableMethod<nsresult>(mRecorder,
&MediaRecorder::NotifyError, rv));
}
if (NS_FAILED(NS_DispatchToMainThread(new EncoderErrorNotifierRunnable(this)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread EncoderErrorNotifierRunnable failed");
}
if (rv != NS_ERROR_DOM_SECURITY_ERR) {
// Don't push a blob if there was a security error.
if (NS_FAILED(NS_DispatchToMainThread(new PushBlobRunnable(this)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread PushBlobRunnable failed");
}
}
if (NS_FAILED(NS_DispatchToMainThread(new DestroyRunnable(this)))) {
MOZ_ASSERT(false, "NS_DispatchToMainThread DestroyRunnable failed");
}
mNeedSessionEndTask = false;
}
void CleanupStreams()
{
if (mInputStream) {
if (mEncoder) {
mInputStream->RemoveDirectListener(mEncoder.get());
}
mInputStream = nullptr;
}
for (RefPtr<MediaInputPort>& inputPort : mInputPorts) {
MOZ_ASSERT(inputPort);
inputPort->Destroy();
}
mInputPorts.Clear();
if (mTrackUnionStream) {
// Sometimes the MediaEncoder might be initialized fail and go to
// |CleanupStreams|. So the mEncoder might be a nullptr in this case.
if (mEncoder && mSelectedVideoTrackID != TRACK_NONE) {
mTrackUnionStream->RemoveVideoOutput(mEncoder->GetVideoSink(), mSelectedVideoTrackID);
}
if (mEncoder) {
mTrackUnionStream->RemoveListener(mEncoder.get());
}
mTrackUnionStream->Destroy();
mTrackUnionStream = nullptr;
}
if (mMediaStream) {
mMediaStream->UnregisterTrackListener(this);
mMediaStream = nullptr;
}
for (RefPtr<MediaStreamTrack>& track : mMediaStreamTracks) {
track->RemovePrincipalChangeObserver(this);
}
mMediaStreamTracks.Clear();
}
NS_IMETHOD Observe(nsISupports *aSubject, const char *aTopic, const char16_t *aData) override
{
MOZ_ASSERT(NS_IsMainThread());
LOG(LogLevel::Debug, ("Session.Observe XPCOM_SHUTDOWN %p", this));
if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
// Force stop Session to terminate Read Thread.
mEncoder->Cancel();
if (mReadThread) {
mReadThread->Shutdown();
mReadThread = nullptr;
}
nsContentUtils::UnregisterShutdownObserver(this);
BreakCycle();
Stop();
}
return NS_OK;
}
// Break the cycle reference between Session and MediaRecorder.
void BreakCycle()
{
MOZ_ASSERT(NS_IsMainThread());
if (mRecorder) {
mRecorder->RemoveSession(this);
mRecorder = nullptr;
}
}
private:
// Hold reference to MediaRecoder that ensure MediaRecorder is alive
// if there is an active session. Access ONLY on main thread.
RefPtr<MediaRecorder> mRecorder;
// Receive track data from source and dispatch to Encoder.
// Pause/ Resume controller.
RefPtr<ProcessedMediaStream> mTrackUnionStream;
RefPtr<SourceMediaStream> mInputStream;
nsTArray<RefPtr<MediaInputPort>> mInputPorts;
// Stream currently recorded.
RefPtr<DOMMediaStream> mMediaStream;
// Tracks currently recorded. This should be a subset of mMediaStream's track
// set.
nsTArray<RefPtr<MediaStreamTrack>> mMediaStreamTracks;
// Runnable thread for read data from MediaEncode.
nsCOMPtr<nsIThread> mReadThread;
// MediaEncoder pipeline.
RefPtr<MediaEncoder> mEncoder;
// A buffer to cache encoded meda data.
nsAutoPtr<EncodedBufferCache> mEncodedBufferCache;
// Current session mimeType
nsString mMimeType;
// Timestamp of the last fired dataavailable event.
TimeStamp mLastBlobTimeStamp;
// The interval of passing encoded data from EncodedBufferCache to onDataAvailable
// handler. "mTimeSlice < 0" means Session object does not push encoded data to
// onDataAvailable, instead, it passive wait the client side pull encoded data
// by calling requestData API.
const int32_t mTimeSlice;
// Indicate this session's stop has been called.
bool mStopIssued;
// Indicate the session had fire start event. Encoding thread only.
bool mIsStartEventFired;
// The register flag for "Media_Encoder" thread to profiler
bool mIsRegisterProfiler;
// False if the InitEncoder called successfully, ensure the
// ExtractRunnable/DestroyRunnable will end the session.
// Main thread only.
bool mNeedSessionEndTask;
TrackID mSelectedVideoTrackID;
};
NS_IMPL_ISUPPORTS(MediaRecorder::Session, nsIObserver)
MediaRecorder::~MediaRecorder()
{
if (mPipeStream != nullptr) {
mInputPort->Destroy();
mPipeStream->Destroy();
}
LOG(LogLevel::Debug, ("~MediaRecorder (%p)", this));
UnRegisterActivityObserver();
}
MediaRecorder::MediaRecorder(DOMMediaStream& aSourceMediaStream,
nsPIDOMWindowInner* aOwnerWindow)
: DOMEventTargetHelper(aOwnerWindow)
, mState(RecordingState::Inactive)
{
MOZ_ASSERT(aOwnerWindow);
MOZ_ASSERT(aOwnerWindow->IsInnerWindow());
mDOMStream = &aSourceMediaStream;
RegisterActivityObserver();
}
MediaRecorder::MediaRecorder(AudioNode& aSrcAudioNode,
uint32_t aSrcOutput,
nsPIDOMWindowInner* aOwnerWindow)
: DOMEventTargetHelper(aOwnerWindow)
, mState(RecordingState::Inactive)
{
MOZ_ASSERT(aOwnerWindow);
MOZ_ASSERT(aOwnerWindow->IsInnerWindow());
// Only AudioNodeStream of kind EXTERNAL_STREAM stores output audio data in
// the track (see AudioNodeStream::AdvanceOutputSegment()). That means track
// union stream in recorder session won't be able to copy data from the
// stream of non-destination node. Create a pipe stream in this case.
if (aSrcAudioNode.NumberOfOutputs() > 0) {
AudioContext* ctx = aSrcAudioNode.Context();
AudioNodeEngine* engine = new AudioNodeEngine(nullptr);
AudioNodeStream::Flags flags =
AudioNodeStream::EXTERNAL_OUTPUT |
AudioNodeStream::NEED_MAIN_THREAD_FINISHED;
mPipeStream = AudioNodeStream::Create(ctx, engine, flags, ctx->Graph());
AudioNodeStream* ns = aSrcAudioNode.GetStream();
if (ns) {
mInputPort =
mPipeStream->AllocateInputPort(aSrcAudioNode.GetStream(),
TRACK_ANY, TRACK_ANY,
0, aSrcOutput);
}
}
mAudioNode = &aSrcAudioNode;
RegisterActivityObserver();
}
void
MediaRecorder::RegisterActivityObserver()
{
if (nsPIDOMWindowInner* window = GetOwner()) {
nsIDocument* doc = window->GetExtantDoc();
if (doc) {
doc->RegisterActivityObserver(
NS_ISUPPORTS_CAST(nsIDocumentActivity*, this));
}
}
}
void
MediaRecorder::UnRegisterActivityObserver()
{
if (nsPIDOMWindowInner* window = GetOwner()) {
nsIDocument* doc = window->GetExtantDoc();
if (doc) {
doc->UnregisterActivityObserver(
NS_ISUPPORTS_CAST(nsIDocumentActivity*, this));
}
}
}
void
MediaRecorder::SetMimeType(const nsString &aMimeType)
{
mMimeType = aMimeType;
}
void
MediaRecorder::GetMimeType(nsString &aMimeType)
{
aMimeType = mMimeType;
}
void
MediaRecorder::Start(const Optional<int32_t>& aTimeSlice, ErrorResult& aResult)
{
LOG(LogLevel::Debug, ("MediaRecorder.Start %p", this));
if (mState != RecordingState::Inactive) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (GetSourceMediaStream()->IsFinished() || GetSourceMediaStream()->IsDestroyed()) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsTArray<RefPtr<MediaStreamTrack>> tracks;
if (mDOMStream) {
mDOMStream->GetTracks(tracks);
}
if (!tracks.IsEmpty()) {
// If there are tracks already available that we're not allowed
// to record, we should throw a security error.
bool subsumes = false;
nsPIDOMWindowInner* window;
nsIDocument* doc;
if (!(window = GetOwner()) ||
!(doc = window->GetExtantDoc()) ||
NS_FAILED(doc->NodePrincipal()->Subsumes(
mDOMStream->GetPrincipal(), &subsumes)) ||
!subsumes) {
aResult.Throw(NS_ERROR_DOM_SECURITY_ERR);
return;
}
}
int32_t timeSlice = 0;
if (aTimeSlice.WasPassed()) {
if (aTimeSlice.Value() < 0) {
aResult.Throw(NS_ERROR_INVALID_ARG);
return;
}
timeSlice = aTimeSlice.Value();
}
MediaRecorderReporter::AddMediaRecorder(this);
mState = RecordingState::Recording;
// Start a session.
mSessions.AppendElement();
mSessions.LastElement() = new Session(this, timeSlice);
mSessions.LastElement()->Start();
}
void
MediaRecorder::Stop(ErrorResult& aResult)
{
LOG(LogLevel::Debug, ("MediaRecorder.Stop %p", this));
MediaRecorderReporter::RemoveMediaRecorder(this);
if (mState == RecordingState::Inactive) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
mState = RecordingState::Inactive;
MOZ_ASSERT(mSessions.Length() > 0);
mSessions.LastElement()->Stop();
}
void
MediaRecorder::Pause(ErrorResult& aResult)
{
LOG(LogLevel::Debug, ("MediaRecorder.Pause"));
if (mState != RecordingState::Recording) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
MOZ_ASSERT(mSessions.Length() > 0);
nsresult rv = mSessions.LastElement()->Pause();
if (NS_FAILED(rv)) {
NotifyError(rv);
return;
}
mState = RecordingState::Paused;
}
void
MediaRecorder::Resume(ErrorResult& aResult)
{
LOG(LogLevel::Debug, ("MediaRecorder.Resume"));
if (mState != RecordingState::Paused) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
MOZ_ASSERT(mSessions.Length() > 0);
nsresult rv = mSessions.LastElement()->Resume();
if (NS_FAILED(rv)) {
NotifyError(rv);
return;
}
mState = RecordingState::Recording;
}
void
MediaRecorder::RequestData(ErrorResult& aResult)
{
if (mState != RecordingState::Recording) {
aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
MOZ_ASSERT(mSessions.Length() > 0);
nsresult rv = mSessions.LastElement()->RequestData();
if (NS_FAILED(rv)) {
NotifyError(rv);
}
}
JSObject*
MediaRecorder::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return MediaRecorderBinding::Wrap(aCx, this, aGivenProto);
}
/* static */ already_AddRefed<MediaRecorder>
MediaRecorder::Constructor(const GlobalObject& aGlobal,
DOMMediaStream& aStream,
const MediaRecorderOptions& aInitDict,
ErrorResult& aRv)
{
nsCOMPtr<nsPIDOMWindowInner> ownerWindow = do_QueryInterface(aGlobal.GetAsSupports());
if (!ownerWindow) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
if (!IsTypeSupported(aInitDict.mMimeType)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
RefPtr<MediaRecorder> object = new MediaRecorder(aStream, ownerWindow);
object->SetOptions(aInitDict);
return object.forget();
}
/* static */ already_AddRefed<MediaRecorder>
MediaRecorder::Constructor(const GlobalObject& aGlobal,
AudioNode& aSrcAudioNode,
uint32_t aSrcOutput,
const MediaRecorderOptions& aInitDict,
ErrorResult& aRv)
{
// Allow recording from audio node only when pref is on.
if (!Preferences::GetBool("media.recorder.audio_node.enabled", false)) {
// Pretending that this constructor is not defined.
NS_NAMED_LITERAL_STRING(argStr, "Argument 1 of MediaRecorder.constructor");
NS_NAMED_LITERAL_STRING(typeStr, "MediaStream");
aRv.ThrowTypeError<MSG_DOES_NOT_IMPLEMENT_INTERFACE>(argStr, typeStr);
return nullptr;
}
nsCOMPtr<nsPIDOMWindowInner> ownerWindow = do_QueryInterface(aGlobal.GetAsSupports());
if (!ownerWindow) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// aSrcOutput doesn't matter to destination node because it has no output.
if (aSrcAudioNode.NumberOfOutputs() > 0 &&
aSrcOutput >= aSrcAudioNode.NumberOfOutputs()) {
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
return nullptr;
}
if (!IsTypeSupported(aInitDict.mMimeType)) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
RefPtr<MediaRecorder> object = new MediaRecorder(aSrcAudioNode,
aSrcOutput,
ownerWindow);
object->SetOptions(aInitDict);
return object.forget();
}
void
MediaRecorder::SetOptions(const MediaRecorderOptions& aInitDict)
{
SetMimeType(aInitDict.mMimeType);
mAudioBitsPerSecond = aInitDict.mAudioBitsPerSecond.WasPassed() ?
aInitDict.mAudioBitsPerSecond.Value() : 0;
mVideoBitsPerSecond = aInitDict.mVideoBitsPerSecond.WasPassed() ?
aInitDict.mVideoBitsPerSecond.Value() : 0;
mBitsPerSecond = aInitDict.mBitsPerSecond.WasPassed() ?
aInitDict.mBitsPerSecond.Value() : 0;
// We're not handling dynamic changes yet. Eventually we'll handle
// setting audio, video and/or total -- and anything that isn't set,
// we'll derive. Calculated versions require querying bitrates after
// the encoder is Init()ed. This happens only after data is
// available and thus requires dynamic changes.
//
// Until dynamic changes are supported, I prefer to be safe and err
// slightly high
if (aInitDict.mBitsPerSecond.WasPassed() && !aInitDict.mVideoBitsPerSecond.WasPassed()) {
mVideoBitsPerSecond = mBitsPerSecond;
}
}
static char const *const gWebMAudioEncoderCodecs[2] = {
"opus",
// no VP9 yet
nullptr,
};
static char const *const gWebMVideoEncoderCodecs[4] = {
"opus",
"vp8",
"vp8.0",
// no VP9 yet
nullptr,
};
static char const *const gOggAudioEncoderCodecs[2] = {
"opus",
// we could support vorbis here too, but don't
nullptr,
};
template <class String>
static bool
CodecListContains(char const *const * aCodecs, const String& aCodec)
{
for (int32_t i = 0; aCodecs[i]; ++i) {
if (aCodec.EqualsASCII(aCodecs[i]))
return true;
}
return false;
}
/* static */
bool
MediaRecorder::IsTypeSupported(GlobalObject& aGlobal, const nsAString& aMIMEType)
{
return IsTypeSupported(aMIMEType);
}
/* static */
bool
MediaRecorder::IsTypeSupported(const nsAString& aMIMEType)
{
char const* const* codeclist = nullptr;
if (aMIMEType.IsEmpty()) {
return true;
}
nsContentTypeParser parser(aMIMEType);
nsAutoString mimeType;
nsresult rv = parser.GetType(mimeType);
if (NS_FAILED(rv)) {
return false;
}
// effectively a 'switch (mimeType) {'
if (mimeType.EqualsLiteral(AUDIO_OGG)) {
if (MediaDecoder::IsOggEnabled() && MediaDecoder::IsOpusEnabled()) {
codeclist = gOggAudioEncoderCodecs;
}
}
#ifdef MOZ_WEBM_ENCODER
else if (mimeType.EqualsLiteral(VIDEO_WEBM) &&
MediaEncoder::IsWebMEncoderEnabled()) {
codeclist = gWebMVideoEncoderCodecs;
}
#endif
#ifdef MOZ_OMX_ENCODER
// We're working on MP4 encoder support for desktop
else if (mimeType.EqualsLiteral(VIDEO_MP4) ||
mimeType.EqualsLiteral(AUDIO_3GPP) ||
mimeType.EqualsLiteral(AUDIO_3GPP2)) {
if (MediaEncoder::IsOMXEncoderEnabled()) {
// XXX check codecs for MP4/3GPP
return true;
}
}
#endif
// codecs don't matter if we don't support the container
if (!codeclist) {
return false;
}
// now filter on codecs, and if needed rescind support
nsAutoString codecstring;
rv = parser.GetParameter("codecs", codecstring);
nsTArray<nsString> codecs;
if (!ParseCodecsString(codecstring, codecs)) {
return false;
}
for (const nsString& codec : codecs) {
if (!CodecListContains(codeclist, codec)) {
// Totally unsupported codec
return false;
}
}
return true;
}
nsresult
MediaRecorder::CreateAndDispatchBlobEvent(already_AddRefed<nsIDOMBlob>&& aBlob)
{
MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
BlobEventInit init;
init.mBubbles = false;
init.mCancelable = false;
nsCOMPtr<nsIDOMBlob> blob = aBlob;
init.mData = static_cast<Blob*>(blob.get());
RefPtr<BlobEvent> event =
BlobEvent::Constructor(this,
NS_LITERAL_STRING("dataavailable"),
init);
event->SetTrusted(true);
return DispatchDOMEvent(nullptr, event, nullptr, nullptr);
}
void
MediaRecorder::DispatchSimpleEvent(const nsAString & aStr)
{
MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
nsresult rv = CheckInnerWindowCorrectness();
if (NS_FAILED(rv)) {
return;
}
RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
event->InitEvent(aStr, false, false);
event->SetTrusted(true);
rv = DispatchDOMEvent(nullptr, event, nullptr, nullptr);
if (NS_FAILED(rv)) {
NS_ERROR("Failed to dispatch the event!!!");
return;
}
}
void
MediaRecorder::NotifyError(nsresult aRv)
{
MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
nsresult rv = CheckInnerWindowCorrectness();
if (NS_FAILED(rv)) {
return;
}
nsString errorMsg;
switch (aRv) {
case NS_ERROR_DOM_SECURITY_ERR:
errorMsg = NS_LITERAL_STRING("SecurityError");
break;
case NS_ERROR_OUT_OF_MEMORY:
errorMsg = NS_LITERAL_STRING("OutOfMemoryError");
break;
default:
errorMsg = NS_LITERAL_STRING("GenericError");
}
RecordErrorEventInit init;
init.mBubbles = false;
init.mCancelable = false;
init.mName = errorMsg;
RefPtr<RecordErrorEvent> event =
RecordErrorEvent::Constructor(this, NS_LITERAL_STRING("error"), init);
event->SetTrusted(true);
rv = DispatchDOMEvent(nullptr, event, nullptr, nullptr);
if (NS_FAILED(rv)) {
NS_ERROR("Failed to dispatch the error event!!!");
return;
}
return;
}
void
MediaRecorder::RemoveSession(Session* aSession)
{
LOG(LogLevel::Debug, ("MediaRecorder.RemoveSession (%p)", aSession));
mSessions.RemoveElement(aSession);
}
void
MediaRecorder::NotifyOwnerDocumentActivityChanged()
{
nsPIDOMWindowInner* window = GetOwner();
NS_ENSURE_TRUE_VOID(window);
nsIDocument* doc = window->GetExtantDoc();
NS_ENSURE_TRUE_VOID(doc);
LOG(LogLevel::Debug, ("MediaRecorder %p document IsActive %d isVisible %d\n",
this, doc->IsActive(), doc->IsVisible()));
if (!doc->IsActive() || !doc->IsVisible()) {
// Stop the session.
ErrorResult result;
Stop(result);
result.SuppressException();
}
}
MediaStream*
MediaRecorder::GetSourceMediaStream()
{
if (mDOMStream != nullptr) {
return mDOMStream->GetPlaybackStream();
}
MOZ_ASSERT(mAudioNode != nullptr);
return mPipeStream ? mPipeStream.get() : mAudioNode->GetStream();
}
size_t
MediaRecorder::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
size_t amount = 42;
for (size_t i = 0; i < mSessions.Length(); ++i) {
amount += mSessions[i]->SizeOfExcludingThis(aMallocSizeOf);
}
return amount;
}
StaticRefPtr<MediaRecorderReporter> MediaRecorderReporter::sUniqueInstance;
MediaRecorderReporter* MediaRecorderReporter::UniqueInstance()
{
if (!sUniqueInstance) {
sUniqueInstance = new MediaRecorderReporter();
sUniqueInstance->InitMemoryReporter();
}
return sUniqueInstance;
}
void MediaRecorderReporter::InitMemoryReporter()
{
RegisterWeakMemoryReporter(this);
}
MediaRecorderReporter::~MediaRecorderReporter()
{
UnregisterWeakMemoryReporter(this);
}
} // namespace dom
} // namespace mozilla
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