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gecko/dom/media/MediaManager.cpp

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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "MediaManager.h"
#include "MediaStreamGraph.h"
#include "GetUserMediaRequest.h"
#include "nsHashPropertyBag.h"
#ifdef MOZ_WIDGET_GONK
#include "nsIAudioManager.h"
#endif
#include "nsIDOMFile.h"
#include "nsIEventTarget.h"
#include "nsIUUIDGenerator.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPermissionManager.h"
#include "nsIPopupWindowManager.h"
#include "nsISupportsArray.h"
#include "nsIDocShell.h"
#include "nsIDocument.h"
#include "nsISupportsPrimitives.h"
#include "nsIInterfaceRequestorUtils.h"
#include "mozilla/Types.h"
#include "mozilla/PeerIdentity.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/MediaStreamBinding.h"
#include "mozilla/dom/MediaStreamTrackBinding.h"
#include "mozilla/dom/GetUserMediaRequestBinding.h"
#include "mozilla/Preferences.h"
#include "MediaTrackConstraints.h"
#include "Latency.h"
// For PR_snprintf
#include "prprf.h"
#include "nsJSUtils.h"
#include "nsDOMFile.h"
#include "nsGlobalWindow.h"
#include "mozilla/Preferences.h"
/* Using WebRTC backend on Desktops (Mac, Windows, Linux), otherwise default */
#include "MediaEngineDefault.h"
#if defined(MOZ_WEBRTC)
#include "MediaEngineWebRTC.h"
#endif
#ifdef MOZ_B2G
#include "MediaPermissionGonk.h"
#endif
// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
// GetTickCount() and conflicts with MediaStream::GetCurrentTime.
#ifdef GetCurrentTime
#undef GetCurrentTime
#endif
// XXX Workaround for bug 986974 to maintain the existing broken semantics
template<>
struct nsIMediaDevice::COMTypeInfo<mozilla::VideoDevice, void> {
static const nsIID kIID NS_HIDDEN;
};
const nsIID nsIMediaDevice::COMTypeInfo<mozilla::VideoDevice, void>::kIID = NS_IMEDIADEVICE_IID;
template<>
struct nsIMediaDevice::COMTypeInfo<mozilla::AudioDevice, void> {
static const nsIID kIID NS_HIDDEN;
};
const nsIID nsIMediaDevice::COMTypeInfo<mozilla::AudioDevice, void>::kIID = NS_IMEDIADEVICE_IID;
namespace mozilla {
#ifdef LOG
#undef LOG
#endif
#ifdef PR_LOGGING
PRLogModuleInfo*
GetMediaManagerLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("MediaManager");
return sLog;
}
#define LOG(msg) PR_LOG(GetMediaManagerLog(), PR_LOG_DEBUG, msg)
#else
#define LOG(msg)
#endif
using dom::MediaStreamConstraints; // Outside API (contains JSObject)
using dom::MediaTrackConstraintSet; // Mandatory or optional constraints
using dom::MediaTrackConstraints; // Raw mMandatory (as JSObject)
using dom::GetUserMediaRequest;
using dom::Sequence;
using dom::OwningBooleanOrMediaTrackConstraints;
using dom::SupportedAudioConstraints;
using dom::SupportedVideoConstraints;
ErrorCallbackRunnable::ErrorCallbackRunnable(
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback>& aSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aError,
const nsAString& aErrorMsg, uint64_t aWindowID)
: mErrorMsg(aErrorMsg)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance())
{
mSuccess.swap(aSuccess);
mError.swap(aError);
}
ErrorCallbackRunnable::~ErrorCallbackRunnable()
{
MOZ_ASSERT(!mSuccess && !mError);
}
NS_IMETHODIMP
ErrorCallbackRunnable::Run()
{
// Only run if the window is still active.
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success = mSuccess.forget();
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error = mError.forget();
if (!(mManager->IsWindowStillActive(mWindowID))) {
return NS_OK;
}
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
error->OnError(mErrorMsg);
return NS_OK;
}
/**
* Invoke the "onSuccess" callback in content. The callback will take a
* DOMBlob in the case of {picture:true}, and a MediaStream in the case of
* {audio:true} or {video:true}. There is a constructor available for each
* form. Do this only on the main thread.
*/
class SuccessCallbackRunnable : public nsRunnable
{
public:
SuccessCallbackRunnable(
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback>& aSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aError,
nsIDOMFile* aFile, uint64_t aWindowID)
: mFile(aFile)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance())
{
mSuccess.swap(aSuccess);
mError.swap(aError);
}
NS_IMETHOD
Run()
{
// Only run if the window is still active.
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success = mSuccess.forget();
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error = mError.forget();
if (!(mManager->IsWindowStillActive(mWindowID))) {
return NS_OK;
}
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
success->OnSuccess(mFile);
return NS_OK;
}
private:
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mError;
nsCOMPtr<nsIDOMFile> mFile;
uint64_t mWindowID;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Invoke the GetUserMediaDevices success callback. Wrapped in a runnable
* so that it may be called on the main thread. The error callback is also
* passed so it can be released correctly.
*/
class DeviceSuccessCallbackRunnable: public nsRunnable
{
public:
DeviceSuccessCallbackRunnable(
uint64_t aWindowID,
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback>& aSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aError,
nsTArray<nsCOMPtr<nsIMediaDevice> >* aDevices)
: mDevices(aDevices)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance())
{
mSuccess.swap(aSuccess);
mError.swap(aError);
}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
// Only run if window is still on our active list.
if (!mManager->IsWindowStillActive(mWindowID)) {
return NS_OK;
}
nsCOMPtr<nsIWritableVariant> devices =
do_CreateInstance("@mozilla.org/variant;1");
int32_t len = mDevices->Length();
if (len == 0) {
// XXX
// We should in the future return an empty array, and dynamically add
// devices to the dropdowns if things are hotplugged while the
// requester is up.
mError->OnError(NS_LITERAL_STRING("NO_DEVICES_FOUND"));
return NS_OK;
}
nsTArray<nsIMediaDevice*> tmp(len);
for (int32_t i = 0; i < len; i++) {
tmp.AppendElement(mDevices->ElementAt(i));
}
devices->SetAsArray(nsIDataType::VTYPE_INTERFACE,
&NS_GET_IID(nsIMediaDevice),
mDevices->Length(),
const_cast<void*>(
static_cast<const void*>(tmp.Elements())
));
mSuccess->OnSuccess(devices);
return NS_OK;
}
private:
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> mSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mError;
nsAutoPtr<nsTArray<nsCOMPtr<nsIMediaDevice> > > mDevices;
uint64_t mWindowID;
nsRefPtr<MediaManager> mManager;
};
// Handle removing GetUserMediaCallbackMediaStreamListener from main thread
class GetUserMediaListenerRemove: public nsRunnable
{
public:
GetUserMediaListenerRemove(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
: mWindowID(aWindowID)
, mListener(aListener) {}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsRefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
return NS_OK;
}
protected:
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
};
/**
* nsIMediaDevice implementation.
*/
NS_IMPL_ISUPPORTS(MediaDevice, nsIMediaDevice)
MediaDevice* MediaDevice::Create(MediaEngineVideoSource* source) {
return new VideoDevice(source);
}
MediaDevice* MediaDevice::Create(MediaEngineAudioSource* source) {
return new AudioDevice(source);
}
MediaDevice::MediaDevice(MediaEngineSource* aSource)
: mHasFacingMode(false)
, mSource(aSource) {
mSource->GetName(mName);
mSource->GetUUID(mID);
}
VideoDevice::VideoDevice(MediaEngineVideoSource* aSource)
: MediaDevice(aSource) {
#ifdef MOZ_B2G_CAMERA
if (mName.EqualsLiteral("back")) {
mHasFacingMode = true;
mFacingMode = dom::VideoFacingModeEnum::Environment;
} else if (mName.EqualsLiteral("front")) {
mHasFacingMode = true;
mFacingMode = dom::VideoFacingModeEnum::User;
}
#endif // MOZ_B2G_CAMERA
// Kludge to test user-facing cameras on OSX.
if (mName.Find(NS_LITERAL_STRING("Face")) != -1) {
mHasFacingMode = true;
mFacingMode = dom::VideoFacingModeEnum::User;
}
}
AudioDevice::AudioDevice(MediaEngineAudioSource* aSource)
: MediaDevice(aSource) {}
NS_IMETHODIMP
MediaDevice::GetName(nsAString& aName)
{
aName.Assign(mName);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetType(nsAString& aType)
{
return NS_OK;
}
NS_IMETHODIMP
VideoDevice::GetType(nsAString& aType)
{
aType.AssignLiteral(MOZ_UTF16("video"));
return NS_OK;
}
NS_IMETHODIMP
AudioDevice::GetType(nsAString& aType)
{
aType.AssignLiteral(MOZ_UTF16("audio"));
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetId(nsAString& aID)
{
aID.Assign(mID);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetFacingMode(nsAString& aFacingMode)
{
if (mHasFacingMode) {
aFacingMode.Assign(NS_ConvertUTF8toUTF16(
dom::VideoFacingModeEnumValues::strings[uint32_t(mFacingMode)].value));
} else {
aFacingMode.Truncate(0);
}
return NS_OK;
}
MediaEngineVideoSource*
VideoDevice::GetSource()
{
return static_cast<MediaEngineVideoSource*>(&*mSource);
}
MediaEngineAudioSource*
AudioDevice::GetSource()
{
return static_cast<MediaEngineAudioSource*>(&*mSource);
}
/**
* A subclass that we only use to stash internal pointers to MediaStreamGraph objects
* that need to be cleaned up.
*/
class nsDOMUserMediaStream : public DOMLocalMediaStream
{
public:
static already_AddRefed<nsDOMUserMediaStream>
CreateTrackUnionStream(nsIDOMWindow* aWindow,
MediaEngineSource *aAudioSource,
MediaEngineSource *aVideoSource)
{
DOMMediaStream::TrackTypeHints hints =
(aAudioSource ? DOMMediaStream::HINT_CONTENTS_AUDIO : 0) |
(aVideoSource ? DOMMediaStream::HINT_CONTENTS_VIDEO : 0);
nsRefPtr<nsDOMUserMediaStream> stream = new nsDOMUserMediaStream(aAudioSource);
stream->InitTrackUnionStream(aWindow, hints);
return stream.forget();
}
nsDOMUserMediaStream(MediaEngineSource *aAudioSource) :
mAudioSource(aAudioSource),
mEchoOn(true),
mAgcOn(false),
mNoiseOn(true),
#ifdef MOZ_WEBRTC
mEcho(webrtc::kEcDefault),
mAgc(webrtc::kAgcDefault),
mNoise(webrtc::kNsDefault),
#else
mEcho(0),
mAgc(0),
mNoise(0),
#endif
mPlayoutDelay(20)
{}
virtual ~nsDOMUserMediaStream()
{
Stop();
if (mPort) {
mPort->Destroy();
}
if (mSourceStream) {
mSourceStream->Destroy();
}
}
virtual void Stop()
{
if (mSourceStream) {
mSourceStream->EndAllTrackAndFinish();
}
}
// Allow getUserMedia to pass input data directly to PeerConnection/MediaPipeline
virtual bool AddDirectListener(MediaStreamDirectListener *aListener) MOZ_OVERRIDE
{
if (mSourceStream) {
mSourceStream->AddDirectListener(aListener);
return true; // application should ignore NotifyQueuedTrackData
}
return false;
}
virtual void
AudioConfig(bool aEchoOn, uint32_t aEcho,
bool aAgcOn, uint32_t aAgc,
bool aNoiseOn, uint32_t aNoise,
int32_t aPlayoutDelay)
{
mEchoOn = aEchoOn;
mEcho = aEcho;
mAgcOn = aAgcOn;
mAgc = aAgc;
mNoiseOn = aNoiseOn;
mNoise = aNoise;
mPlayoutDelay = aPlayoutDelay;
}
virtual void RemoveDirectListener(MediaStreamDirectListener *aListener) MOZ_OVERRIDE
{
if (mSourceStream) {
mSourceStream->RemoveDirectListener(aListener);
}
}
// let us intervene for direct listeners when someone does track.enabled = false
virtual void SetTrackEnabled(TrackID aID, bool aEnabled) MOZ_OVERRIDE
{
// We encapsulate the SourceMediaStream and TrackUnion into one entity, so
// we can handle the disabling at the SourceMediaStream
// We need to find the input track ID for output ID aID, so we let the TrackUnion
// forward the request to the source and translate the ID
GetStream()->AsProcessedStream()->ForwardTrackEnabled(aID, aEnabled);
}
// The actual MediaStream is a TrackUnionStream. But these resources need to be
// explicitly destroyed too.
nsRefPtr<SourceMediaStream> mSourceStream;
nsRefPtr<MediaInputPort> mPort;
nsRefPtr<MediaEngineSource> mAudioSource; // so we can turn on AEC
bool mEchoOn;
bool mAgcOn;
bool mNoiseOn;
uint32_t mEcho;
uint32_t mAgc;
uint32_t mNoise;
uint32_t mPlayoutDelay;
};
/**
* Creates a MediaStream, attaches a listener and fires off a success callback
* to the DOM with the stream. We also pass in the error callback so it can
* be released correctly.
*
* All of this must be done on the main thread!
*
* Note that the various GetUserMedia Runnable classes currently allow for
* two streams. If we ever need to support getting more than two streams
* at once, we could convert everything to nsTArray<nsRefPtr<blah> >'s,
* though that would complicate the constructors some. Currently the
* GetUserMedia spec does not allow for more than 2 streams to be obtained in
* one call, to simplify handling of constraints.
*/
class GetUserMediaStreamRunnable : public nsRunnable
{
public:
GetUserMediaStreamRunnable(
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback>& aSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aError,
uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener* aListener,
MediaEngineSource* aAudioSource,
MediaEngineSource* aVideoSource,
PeerIdentity* aPeerIdentity)
: mAudioSource(aAudioSource)
, mVideoSource(aVideoSource)
, mWindowID(aWindowID)
, mListener(aListener)
, mPeerIdentity(aPeerIdentity)
, mManager(MediaManager::GetInstance())
{
mSuccess.swap(aSuccess);
mError.swap(aError);
}
~GetUserMediaStreamRunnable() {}
class TracksAvailableCallback : public DOMMediaStream::OnTracksAvailableCallback
{
public:
TracksAvailableCallback(MediaManager* aManager,
nsIDOMGetUserMediaSuccessCallback* aSuccess,
uint64_t aWindowID,
DOMMediaStream* aStream)
: mWindowID(aWindowID), mSuccess(aSuccess), mManager(aManager),
mStream(aStream) {}
virtual void NotifyTracksAvailable(DOMMediaStream* aStream) MOZ_OVERRIDE
{
// We're in the main thread, so no worries here.
if (!(mManager->IsWindowStillActive(mWindowID))) {
return;
}
// Start currentTime from the point where this stream was successfully
// returned.
aStream->SetLogicalStreamStartTime(aStream->GetStream()->GetCurrentTime());
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
LOG(("Returning success for getUserMedia()"));
mSuccess->OnSuccess(aStream);
}
uint64_t mWindowID;
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mSuccess;
nsRefPtr<MediaManager> mManager;
// Keep the DOMMediaStream alive until the NotifyTracksAvailable callback
// has fired, otherwise we might immediately destroy the DOMMediaStream and
// shut down the underlying MediaStream prematurely.
// This creates a cycle which is broken when NotifyTracksAvailable
// is fired (which will happen unless the browser shuts down,
// since we only add this callback when we've successfully appended
// the desired tracks in the MediaStreamGraph) or when
// DOMMediaStream::NotifyMediaStreamGraphShutdown is called.
nsRefPtr<DOMMediaStream> mStream;
};
NS_IMETHOD
Run()
{
#ifdef MOZ_WEBRTC
int32_t aec = (int32_t) webrtc::kEcUnchanged;
int32_t agc = (int32_t) webrtc::kAgcUnchanged;
int32_t noise = (int32_t) webrtc::kNsUnchanged;
#else
int32_t aec = 0, agc = 0, noise = 0;
#endif
bool aec_on = false, agc_on = false, noise_on = false;
int32_t playout_delay = 0;
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(mWindowID));
// We're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
StreamListeners* listeners = mManager->GetWindowListeners(mWindowID);
if (!listeners || !window || !window->GetExtantDoc()) {
// This window is no longer live. mListener has already been removed
return NS_OK;
}
#ifdef MOZ_WEBRTC
// Right now these configs are only of use if webrtc is available
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService("@mozilla.org/preferences-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(prefs);
if (branch) {
branch->GetBoolPref("media.getusermedia.aec_enabled", &aec_on);
branch->GetIntPref("media.getusermedia.aec", &aec);
branch->GetBoolPref("media.getusermedia.agc_enabled", &agc_on);
branch->GetIntPref("media.getusermedia.agc", &agc);
branch->GetBoolPref("media.getusermedia.noise_enabled", &noise_on);
branch->GetIntPref("media.getusermedia.noise", &noise);
branch->GetIntPref("media.getusermedia.playout_delay", &playout_delay);
}
}
#endif
// Create a media stream.
nsRefPtr<nsDOMUserMediaStream> trackunion =
nsDOMUserMediaStream::CreateTrackUnionStream(window, mAudioSource,
mVideoSource);
if (!trackunion) {
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error = mError.forget();
LOG(("Returning error for getUserMedia() - no stream"));
error->OnError(NS_LITERAL_STRING("NO_STREAM"));
return NS_OK;
}
trackunion->AudioConfig(aec_on, (uint32_t) aec,
agc_on, (uint32_t) agc,
noise_on, (uint32_t) noise,
playout_delay);
MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
nsRefPtr<SourceMediaStream> stream = gm->CreateSourceStream(nullptr);
// connect the source stream to the track union stream to avoid us blocking
trackunion->GetStream()->AsProcessedStream()->SetAutofinish(true);
nsRefPtr<MediaInputPort> port = trackunion->GetStream()->AsProcessedStream()->
AllocateInputPort(stream, MediaInputPort::FLAG_BLOCK_OUTPUT);
trackunion->mSourceStream = stream;
trackunion->mPort = port.forget();
// Log the relationship between SourceMediaStream and TrackUnion stream
// Make sure logger starts before capture
AsyncLatencyLogger::Get(true);
LogLatency(AsyncLatencyLogger::MediaStreamCreate,
reinterpret_cast<uint64_t>(stream.get()),
reinterpret_cast<int64_t>(trackunion->GetStream()));
nsCOMPtr<nsIPrincipal> principal;
if (mPeerIdentity) {
principal = do_CreateInstance("@mozilla.org/nullprincipal;1");
trackunion->SetPeerIdentity(mPeerIdentity.forget());
} else {
principal = window->GetExtantDoc()->NodePrincipal();
}
trackunion->CombineWithPrincipal(principal);
// The listener was added at the beginning in an inactive state.
// Activate our listener. We'll call Start() on the source when get a callback
// that the MediaStream has started consuming. The listener is freed
// when the page is invalidated (on navigation or close).
mListener->Activate(stream.forget(), mAudioSource, mVideoSource);
// Note: includes JS callbacks; must be released on MainThread
TracksAvailableCallback* tracksAvailableCallback =
new TracksAvailableCallback(mManager, mSuccess, mWindowID, trackunion);
mListener->AudioConfig(aec_on, (uint32_t) aec,
agc_on, (uint32_t) agc,
noise_on, (uint32_t) noise,
playout_delay);
// Dispatch to the media thread to ask it to start the sources,
// because that can take a while.
// Pass ownership of trackunion to the MediaOperationRunnable
// to ensure it's kept alive until the MediaOperationRunnable runs (at least).
nsIThread *mediaThread = MediaManager::GetThread();
nsRefPtr<MediaOperationRunnable> runnable(
new MediaOperationRunnable(MEDIA_START, mListener, trackunion,
tracksAvailableCallback,
mAudioSource, mVideoSource, false, mWindowID,
mError.forget()));
mediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
// We won't need mError now.
mError = nullptr;
return NS_OK;
}
private:
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mError;
nsRefPtr<MediaEngineSource> mAudioSource;
nsRefPtr<MediaEngineSource> mVideoSource;
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
nsAutoPtr<PeerIdentity> mPeerIdentity;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
static bool
IsOn(const OwningBooleanOrMediaTrackConstraints &aUnion) {
return !aUnion.IsBoolean() || aUnion.GetAsBoolean();
}
static const MediaTrackConstraints&
GetInvariant(const OwningBooleanOrMediaTrackConstraints &aUnion) {
static const MediaTrackConstraints empty;
return aUnion.IsMediaTrackConstraints() ?
aUnion.GetAsMediaTrackConstraints() : empty;
}
/**
* Helper functions that implement the constraints algorithm from
* http://dev.w3.org/2011/webrtc/editor/getusermedia.html#methods-5
*/
// Reminder: add handling for new constraints both here and in GetSources below!
static bool SatisfyConstraintSet(const MediaEngineVideoSource *,
const MediaTrackConstraintSet &aConstraints,
nsIMediaDevice &aCandidate)
{
if (aConstraints.mFacingMode.WasPassed()) {
nsString s;
aCandidate.GetFacingMode(s);
if (!s.EqualsASCII(dom::VideoFacingModeEnumValues::strings[
uint32_t(aConstraints.mFacingMode.Value())].value)) {
return false;
}
}
// TODO: Add more video-specific constraints
return true;
}
static bool SatisfyConstraintSet(const MediaEngineAudioSource *,
const MediaTrackConstraintSet &aConstraints,
nsIMediaDevice &aCandidate)
{
// TODO: Add audio-specific constraints
return true;
}
typedef nsTArray<nsCOMPtr<nsIMediaDevice> > SourceSet;
// Source getter that constrains list returned
template<class SourceType, class ConstraintsType>
static SourceSet *
GetSources(MediaEngine *engine,
ConstraintsType &aConstraints,
void (MediaEngine::* aEnumerate)(nsTArray<nsRefPtr<SourceType> >*),
const char* media_device_name = nullptr)
{
ScopedDeletePtr<SourceSet> result(new SourceSet);
const SourceType * const type = nullptr;
nsString deviceName;
// First collect sources
SourceSet candidateSet;
{
nsTArray<nsRefPtr<SourceType> > sources;
(engine->*aEnumerate)(&sources);
/**
* We're allowing multiple tabs to access the same camera for parity
* with Chrome. See bug 811757 for some of the issues surrounding
* this decision. To disallow, we'd filter by IsAvailable() as we used
* to.
*/
for (uint32_t len = sources.Length(), i = 0; i < len; i++) {
sources[i]->GetName(deviceName);
if (media_device_name && strlen(media_device_name) > 0) {
if (deviceName.EqualsASCII(media_device_name)) {
candidateSet.AppendElement(MediaDevice::Create(sources[i]));
break;
}
} else {
candidateSet.AppendElement(MediaDevice::Create(sources[i]));
}
}
}
// Apply constraints to the list of sources.
auto& c = aConstraints;
if (c.mUnsupportedRequirement) {
// Check upfront the names of required constraints that are unsupported for
// this media-type. The spec requires these to fail, so getting them out of
// the way early provides a necessary invariant for the remaining algorithm
// which maximizes code-reuse by ignoring constraints of the other type
// (specifically, SatisfyConstraintSet is reused for the advanced algorithm
// where the spec requires it to ignore constraints of the other type)
return result.forget();
}
// Now on to the actual algorithm: First apply required constraints.
for (uint32_t i = 0; i < candidateSet.Length();) {
// Overloading instead of template specialization keeps things local
if (!SatisfyConstraintSet(type, c.mRequired, *candidateSet[i])) {
candidateSet.RemoveElementAt(i);
} else {
++i;
}
}
// TODO(jib): Proper non-ordered handling of nonrequired constraints (907352)
//
// For now, put nonrequired constraints at tail of Advanced list.
// This isn't entirely accurate, as order will matter, but few will notice
// the difference until we get camera selection and a few more constraints.
if (c.mNonrequired.Length()) {
if (!c.mAdvanced.WasPassed()) {
c.mAdvanced.Construct();
}
c.mAdvanced.Value().MoveElementsFrom(c.mNonrequired);
}
// Then apply advanced (formerly known as optional) constraints.
//
// These are only effective when there are multiple sources to pick from.
// Spec as-of-this-writing says to run algorithm on "all possible tracks
// of media type T that the browser COULD RETURN" (emphasis added).
//
// We think users ultimately control which devices we could return, so after
// determining the webpage's preferred list, we add the remaining choices
// to the tail, reasoning that they would all have passed individually,
// i.e. if the user had any one of them as their sole device (enabled).
//
// This avoids users having to unplug/disable devices should a webpage pick
// the wrong one (UX-fail). Webpage-preferred devices will be listed first.
SourceSet tailSet;
if (c.mAdvanced.WasPassed()) {
auto &array = c.mAdvanced.Value();
for (int i = 0; i < int(array.Length()); i++) {
SourceSet rejects;
for (uint32_t j = 0; j < candidateSet.Length();) {
if (!SatisfyConstraintSet(type, array[i], *candidateSet[j])) {
rejects.AppendElement(candidateSet[j]);
candidateSet.RemoveElementAt(j);
} else {
++j;
}
}
(candidateSet.Length()? tailSet : candidateSet).MoveElementsFrom(rejects);
}
}
// TODO: Proper non-ordered handling of nonrequired constraints (Bug 907352)
result->MoveElementsFrom(candidateSet);
result->MoveElementsFrom(tailSet);
return result.forget();
}
/**
* Runs on a seperate thread and is responsible for enumerating devices.
* Depending on whether a picture or stream was asked for, either
* ProcessGetUserMedia or ProcessGetUserMediaSnapshot is called, and the results
* are sent back to the DOM.
*
* Do not run this on the main thread. The success and error callbacks *MUST*
* be dispatched on the main thread!
*/
class GetUserMediaRunnable : public nsRunnable
{
public:
GetUserMediaRunnable(
const MediaStreamConstraints& aConstraints,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs)
: mConstraints(aConstraints)
, mSuccess(aSuccess)
, mError(aError)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mDeviceChosen(false)
, mBackend(nullptr)
, mManager(MediaManager::GetInstance())
{}
/**
* The caller can also choose to provide their own backend instead of
* using the one provided by MediaManager::GetBackend.
*/
GetUserMediaRunnable(
const MediaStreamConstraints& aConstraints,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs,
MediaEngine* aBackend)
: mConstraints(aConstraints)
, mSuccess(aSuccess)
, mError(aError)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mDeviceChosen(false)
, mBackend(aBackend)
, mManager(MediaManager::GetInstance())
{}
~GetUserMediaRunnable() {
}
void
Fail(const nsAString& aMessage) {
nsRefPtr<ErrorCallbackRunnable> runnable =
new ErrorCallbackRunnable(mSuccess, mError, aMessage, mWindowID);
// These should be empty now
MOZ_ASSERT(!mSuccess);
MOZ_ASSERT(!mError);
NS_DispatchToMainThread(runnable);
}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
MOZ_ASSERT(mSuccess);
MOZ_ASSERT(mError);
MediaEngine* backend = mBackend;
// Was a backend provided?
if (!backend) {
backend = mManager->GetBackend(mWindowID);
}
// Was a device provided?
if (!mDeviceChosen) {
nsresult rv = SelectDevice(backend);
if (rv != NS_OK) {
return rv;
}
}
// It is an error if audio or video are requested along with picture.
if (mConstraints.mPicture &&
(IsOn(mConstraints.mAudio) || IsOn(mConstraints.mVideo))) {
Fail(NS_LITERAL_STRING("NOT_SUPPORTED_ERR"));
return NS_OK;
}
if (mConstraints.mPicture) {
ProcessGetUserMediaSnapshot(mVideoDevice->GetSource(), 0);
return NS_OK;
}
// There's a bug in the permission code that can leave us with mAudio but no audio device
ProcessGetUserMedia(((IsOn(mConstraints.mAudio) && mAudioDevice) ?
mAudioDevice->GetSource() : nullptr),
((IsOn(mConstraints.mVideo) && mVideoDevice) ?
mVideoDevice->GetSource() : nullptr));
return NS_OK;
}
nsresult
Denied(const nsAString& aErrorMsg)
{
MOZ_ASSERT(mSuccess);
MOZ_ASSERT(mError);
// We add a disabled listener to the StreamListeners array until accepted
// If this was the only active MediaStream, remove the window from the list.
if (NS_IsMainThread()) {
// This is safe since we're on main-thread, and the window can only
// be invalidated from the main-thread (see OnNavigation)
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success = mSuccess.forget();
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error = mError.forget();
error->OnError(aErrorMsg);
// Should happen *after* error runs for consistency, but may not matter
nsRefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
} else {
// This will re-check the window being alive on main-thread
// Note: we must remove the listener on MainThread as well
Fail(aErrorMsg);
// MUST happen after ErrorCallbackRunnable Run()s, as it checks the active window list
NS_DispatchToMainThread(new GetUserMediaListenerRemove(mWindowID, mListener));
}
MOZ_ASSERT(!mSuccess);
MOZ_ASSERT(!mError);
return NS_OK;
}
nsresult
SetContraints(const MediaStreamConstraints& aConstraints)
{
mConstraints = aConstraints;
return NS_OK;
}
nsresult
SetAudioDevice(AudioDevice* aAudioDevice)
{
mAudioDevice = aAudioDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SetVideoDevice(VideoDevice* aVideoDevice)
{
mVideoDevice = aVideoDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SelectDevice(MediaEngine* backend)
{
MOZ_ASSERT(mSuccess);
MOZ_ASSERT(mError);
if (mConstraints.mPicture || IsOn(mConstraints.mVideo)) {
VideoTrackConstraintsN constraints(GetInvariant(mConstraints.mVideo));
ScopedDeletePtr<SourceSet> sources (GetSources(backend, constraints,
&MediaEngine::EnumerateVideoDevices));
if (!sources->Length()) {
Fail(NS_LITERAL_STRING("NO_DEVICES_FOUND"));
return NS_ERROR_FAILURE;
}
// Pick the first available device.
mVideoDevice = do_QueryObject((*sources)[0]);
LOG(("Selected video device"));
}
if (IsOn(mConstraints.mAudio)) {
AudioTrackConstraintsN constraints(GetInvariant(mConstraints.mAudio));
ScopedDeletePtr<SourceSet> sources (GetSources(backend, constraints,
&MediaEngine::EnumerateAudioDevices));
if (!sources->Length()) {
Fail(NS_LITERAL_STRING("NO_DEVICES_FOUND"));
return NS_ERROR_FAILURE;
}
// Pick the first available device.
mAudioDevice = do_QueryObject((*sources)[0]);
LOG(("Selected audio device"));
}
return NS_OK;
}
/**
* Allocates a video or audio device and returns a MediaStream via
* a GetUserMediaStreamRunnable. Runs off the main thread.
*/
void
ProcessGetUserMedia(MediaEngineAudioSource* aAudioSource,
MediaEngineVideoSource* aVideoSource)
{
MOZ_ASSERT(mSuccess);
MOZ_ASSERT(mError);
nsresult rv;
if (aAudioSource) {
rv = aAudioSource->Allocate(GetInvariant(mConstraints.mAudio), mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate audiosource %d",rv));
Fail(NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"));
return;
}
}
if (aVideoSource) {
rv = aVideoSource->Allocate(GetInvariant(mConstraints.mVideo), mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate videosource %d\n",rv));
if (aAudioSource) {
aAudioSource->Deallocate();
}
Fail(NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"));
return;
}
}
PeerIdentity* peerIdentity = nullptr;
if (!mConstraints.mPeerIdentity.IsEmpty()) {
peerIdentity = new PeerIdentity(mConstraints.mPeerIdentity);
}
NS_DispatchToMainThread(new GetUserMediaStreamRunnable(
mSuccess, mError, mWindowID, mListener, aAudioSource, aVideoSource,
peerIdentity
));
MOZ_ASSERT(!mSuccess);
MOZ_ASSERT(!mError);
return;
}
/**
* Allocates a video device, takes a snapshot and returns a DOMFile via
* a SuccessRunnable or an error via the ErrorRunnable. Off the main thread.
*/
void
ProcessGetUserMediaSnapshot(MediaEngineVideoSource* aSource, int aDuration)
{
MOZ_ASSERT(mSuccess);
MOZ_ASSERT(mError);
nsresult rv = aSource->Allocate(GetInvariant(mConstraints.mVideo), mPrefs);
if (NS_FAILED(rv)) {
Fail(NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"));
return;
}
/**
* Display picture capture UI here before calling Snapshot() - Bug 748835.
*/
nsCOMPtr<nsIDOMFile> file;
aSource->Snapshot(aDuration, getter_AddRefs(file));
aSource->Deallocate();
NS_DispatchToMainThread(new SuccessCallbackRunnable(
mSuccess, mError, file, mWindowID
));
MOZ_ASSERT(!mSuccess);
MOZ_ASSERT(!mError);
return;
}
private:
MediaStreamConstraints mConstraints;
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mError;
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
nsRefPtr<AudioDevice> mAudioDevice;
nsRefPtr<VideoDevice> mVideoDevice;
MediaEnginePrefs mPrefs;
bool mDeviceChosen;
RefPtr<MediaEngine> mBackend;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Similar to GetUserMediaRunnable, but used for the chrome-only
* GetUserMediaDevices function. Enumerates a list of audio & video devices,
* wraps them up in nsIMediaDevice objects and returns it to the success
* callback.
*/
class GetUserMediaDevicesRunnable : public nsRunnable
{
public:
GetUserMediaDevicesRunnable(
const MediaStreamConstraints& aConstraints,
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowId, nsACString& aAudioLoopbackDev,
nsACString& aVideoLoopbackDev)
: mConstraints(aConstraints)
, mSuccess(aSuccess)
, mError(aError)
, mManager(MediaManager::GetInstance())
, mWindowId(aWindowId)
, mLoopbackAudioDevice(aAudioLoopbackDev)
, mLoopbackVideoDevice(aVideoLoopbackDev) {}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
nsRefPtr<MediaEngine> backend;
if (mConstraints.mFake)
backend = new MediaEngineDefault();
else
backend = mManager->GetBackend(mWindowId);
ScopedDeletePtr<SourceSet> final(new SourceSet);
if (IsOn(mConstraints.mVideo)) {
VideoTrackConstraintsN constraints(GetInvariant(mConstraints.mVideo));
ScopedDeletePtr<SourceSet> s(GetSources(backend, constraints,
&MediaEngine::EnumerateVideoDevices,
mLoopbackVideoDevice.get()));
final->MoveElementsFrom(*s);
}
if (IsOn(mConstraints.mAudio)) {
AudioTrackConstraintsN constraints(GetInvariant(mConstraints.mAudio));
ScopedDeletePtr<SourceSet> s (GetSources(backend, constraints,
&MediaEngine::EnumerateAudioDevices,
mLoopbackAudioDevice.get()));
final->MoveElementsFrom(*s);
}
NS_DispatchToMainThread(new DeviceSuccessCallbackRunnable(mWindowId,
mSuccess, mError,
final.forget()));
// DeviceSuccessCallbackRunnable should have taken these.
MOZ_ASSERT(!mSuccess && !mError);
return NS_OK;
}
private:
MediaStreamConstraints mConstraints;
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> mSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mError;
nsRefPtr<MediaManager> mManager;
uint64_t mWindowId;
const nsString mCallId;
// Audio & Video loopback devices to be used based on
// the preference settings. This is currently used for
// automated media tests only.
nsCString mLoopbackAudioDevice;
nsCString mLoopbackVideoDevice;
};
MediaManager::MediaManager()
: mMediaThread(nullptr)
, mMutex("mozilla::MediaManager")
, mBackend(nullptr) {
mPrefs.mWidth = 0; // adaptive default
mPrefs.mHeight = 0; // adaptive default
mPrefs.mFPS = MediaEngine::DEFAULT_VIDEO_FPS;
mPrefs.mMinFPS = MediaEngine::DEFAULT_VIDEO_MIN_FPS;
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService("@mozilla.org/preferences-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(prefs);
if (branch) {
GetPrefs(branch, nullptr);
}
}
LOG(("%s: default prefs: %dx%d @%dfps (min %d)", __FUNCTION__,
mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mMinFPS));
}
NS_IMPL_ISUPPORTS(MediaManager, nsIMediaManagerService, nsIObserver)
/* static */ StaticRefPtr<MediaManager> MediaManager::sSingleton;
// NOTE: never Dispatch(....,NS_DISPATCH_SYNC) to the MediaManager
// thread from the MainThread, as we NS_DISPATCH_SYNC to MainThread
// from MediaManager thread.
/* static */ MediaManager*
MediaManager::Get() {
if (!sSingleton) {
sSingleton = new MediaManager();
NS_NewNamedThread("MediaManager", getter_AddRefs(sSingleton->mMediaThread));
LOG(("New Media thread for gum"));
NS_ASSERTION(NS_IsMainThread(), "Only create MediaManager on main thread");
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(sSingleton, "xpcom-shutdown", false);
obs->AddObserver(sSingleton, "getUserMedia:response:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:deny", false);
obs->AddObserver(sSingleton, "getUserMedia:revoke", false);
obs->AddObserver(sSingleton, "phone-state-changed", false);
}
// else MediaManager won't work properly and will leak (see bug 837874)
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->AddObserver("media.navigator.video.default_width", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_height", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_fps", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_minfps", sSingleton, false);
}
}
return sSingleton;
}
/* static */ already_AddRefed<MediaManager>
MediaManager::GetInstance()
{
// so we can have non-refcounted getters
nsRefPtr<MediaManager> service = MediaManager::Get();
return service.forget();
}
/* static */ nsresult
MediaManager::NotifyRecordingStatusChange(nsPIDOMWindow* aWindow,
const nsString& aMsg,
const bool& aIsAudio,
const bool& aIsVideo)
{
NS_ENSURE_ARG(aWindow);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!obs) {
NS_WARNING("Could not get the Observer service for GetUserMedia recording notification.");
return NS_ERROR_FAILURE;
}
nsRefPtr<nsHashPropertyBag> props = new nsHashPropertyBag();
props->SetPropertyAsBool(NS_LITERAL_STRING("isAudio"), aIsAudio);
props->SetPropertyAsBool(NS_LITERAL_STRING("isVideo"), aIsVideo);
bool isApp = false;
nsString requestURL;
if (nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell()) {
nsresult rv = docShell->GetIsApp(&isApp);
NS_ENSURE_SUCCESS(rv, rv);
if (isApp) {
rv = docShell->GetAppManifestURL(requestURL);
NS_ENSURE_SUCCESS(rv, rv);
}
}
if (!isApp) {
nsCString pageURL;
nsCOMPtr<nsIURI> docURI = aWindow->GetDocumentURI();
NS_ENSURE_TRUE(docURI, NS_ERROR_FAILURE);
nsresult rv = docURI->GetSpec(pageURL);
NS_ENSURE_SUCCESS(rv, rv);
requestURL = NS_ConvertUTF8toUTF16(pageURL);
}
props->SetPropertyAsBool(NS_LITERAL_STRING("isApp"), isApp);
props->SetPropertyAsAString(NS_LITERAL_STRING("requestURL"), requestURL);
obs->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
"recording-device-events",
aMsg.get());
// Forward recording events to parent process.
// The events are gathered in chrome process and used for recording indicator
if (XRE_GetProcessType() != GeckoProcessType_Default) {
unused <<
dom::ContentChild::GetSingleton()->SendRecordingDeviceEvents(aMsg,
requestURL,
aIsAudio,
aIsVideo);
}
return NS_OK;
}
/**
* The entry point for this file. A call from Navigator::mozGetUserMedia
* will end up here. MediaManager is a singleton that is responsible
* for handling all incoming getUserMedia calls from every window.
*/
nsresult
MediaManager::GetUserMedia(bool aPrivileged,
nsPIDOMWindow* aWindow, const MediaStreamConstraints& aConstraints,
nsIDOMGetUserMediaSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnError)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
NS_ENSURE_TRUE(aWindow, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnError, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnSuccess, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError(aOnError);
MediaStreamConstraints c(aConstraints); // copy
/**
* If we were asked to get a picture, before getting a snapshot, we check if
* the calling page is allowed to open a popup. We do this because
* {picture:true} will open a new "window" to let the user preview or select
* an image, on Android. The desktop UI for {picture:true} is TBD, at which
* may point we can decide whether to extend this test there as well.
*/
#if !defined(MOZ_WEBRTC)
if (c.mPicture && !aPrivileged) {
if (aWindow->GetPopupControlState() > openControlled) {
nsCOMPtr<nsIPopupWindowManager> pm =
do_GetService(NS_POPUPWINDOWMANAGER_CONTRACTID);
if (!pm) {
return NS_OK;
}
uint32_t permission;
nsCOMPtr<nsIDocument> doc = aWindow->GetExtantDoc();
pm->TestPermission(doc->NodePrincipal(), &permission);
if (permission == nsIPopupWindowManager::DENY_POPUP) {
nsGlobalWindow::FirePopupBlockedEvent(
doc, aWindow, nullptr, EmptyString(), EmptyString()
);
return NS_OK;
}
}
}
#endif
static bool created = false;
if (!created) {
// Force MediaManager to startup before we try to access it from other threads
// Hack: should init singleton earlier unless it's expensive (mem or CPU)
(void) MediaManager::Get();
#ifdef MOZ_B2G
// Initialize MediaPermissionManager before send out any permission request.
(void) MediaPermissionManager::GetInstance();
#endif //MOZ_B2G
}
// Store the WindowID in a hash table and mark as active. The entry is removed
// when this window is closed or navigated away from.
uint64_t windowID = aWindow->WindowID();
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
StreamListeners* listeners = GetActiveWindows()->Get(windowID);
if (!listeners) {
listeners = new StreamListeners;
GetActiveWindows()->Put(windowID, listeners);
}
// Ensure there's a thread for gum to proxy to off main thread
nsIThread *mediaThread = MediaManager::GetThread();
// Create a disabled listener to act as a placeholder
GetUserMediaCallbackMediaStreamListener* listener =
new GetUserMediaCallbackMediaStreamListener(mediaThread, windowID);
// No need for locking because we always do this in the main thread.
listeners->AppendElement(listener);
// Developer preference for turning off permission check.
if (Preferences::GetBool("media.navigator.permission.disabled", false)) {
aPrivileged = true;
}
if (!Preferences::GetBool("media.navigator.video.enabled", true)) {
c.mVideo.SetAsBoolean() = false;
}
#if defined(ANDROID) || defined(MOZ_WIDGET_GONK)
// Be backwards compatible only on mobile and only for facingMode.
if (c.mVideo.IsMediaTrackConstraints()) {
auto& tc = c.mVideo.GetAsMediaTrackConstraints();
if (!tc.mRequire.WasPassed() &&
tc.mMandatory.mFacingMode.WasPassed() && !tc.mFacingMode.WasPassed()) {
tc.mFacingMode.Construct(tc.mMandatory.mFacingMode.Value());
tc.mRequire.Construct().AppendElement(NS_LITERAL_STRING("facingMode"));
}
if (tc.mOptional.WasPassed() && !tc.mAdvanced.WasPassed()) {
tc.mAdvanced.Construct();
for (uint32_t i = 0; i < tc.mOptional.Value().Length(); i++) {
if (tc.mOptional.Value()[i].mFacingMode.WasPassed()) {
MediaTrackConstraintSet n;
n.mFacingMode.Construct(tc.mOptional.Value()[i].mFacingMode.Value());
tc.mAdvanced.Value().AppendElement(n);
}
}
}
}
#endif
// Pass callbacks and MediaStreamListener along to GetUserMediaRunnable.
nsRefPtr<GetUserMediaRunnable> runnable;
if (c.mFake) {
// Fake stream from default backend.
runnable = new GetUserMediaRunnable(c, onSuccess.forget(),
onError.forget(), windowID, listener, mPrefs, new MediaEngineDefault());
} else {
// Stream from default device from WebRTC backend.
runnable = new GetUserMediaRunnable(c, onSuccess.forget(),
onError.forget(), windowID, listener, mPrefs);
}
#ifdef MOZ_B2G_CAMERA
if (mCameraManager == nullptr) {
mCameraManager = nsDOMCameraManager::CreateInstance(aWindow);
}
#endif
#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
if (c.mPicture) {
// ShowFilePickerForMimeType() must run on the Main Thread! (on Android)
NS_DispatchToMainThread(runnable);
return NS_OK;
}
#endif
// XXX No full support for picture in Desktop yet (needs proper UI)
if (aPrivileged ||
(c.mFake && !Preferences::GetBool("media.navigator.permission.fake"))) {
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
} else {
bool isHTTPS = false;
nsIURI* docURI = aWindow->GetDocumentURI();
if (docURI) {
docURI->SchemeIs("https", &isHTTPS);
}
// Check if this site has persistent permissions.
nsresult rv;
nsCOMPtr<nsIPermissionManager> permManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t audioPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mAudio)) {
rv = permManager->TestExactPermissionFromPrincipal(
aWindow->GetExtantDoc()->NodePrincipal(), "microphone", &audioPerm);
NS_ENSURE_SUCCESS(rv, rv);
if (audioPerm == nsIPermissionManager::PROMPT_ACTION) {
audioPerm = nsIPermissionManager::UNKNOWN_ACTION;
}
if (audioPerm == nsIPermissionManager::ALLOW_ACTION) {
if (!isHTTPS) {
audioPerm = nsIPermissionManager::UNKNOWN_ACTION;
}
}
}
uint32_t videoPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mVideo)) {
rv = permManager->TestExactPermissionFromPrincipal(
aWindow->GetExtantDoc()->NodePrincipal(), "camera", &videoPerm);
NS_ENSURE_SUCCESS(rv, rv);
if (videoPerm == nsIPermissionManager::PROMPT_ACTION) {
videoPerm = nsIPermissionManager::UNKNOWN_ACTION;
}
if (videoPerm == nsIPermissionManager::ALLOW_ACTION) {
if (!isHTTPS) {
videoPerm = nsIPermissionManager::UNKNOWN_ACTION;
}
}
}
if ((!IsOn(c.mAudio) || audioPerm != nsIPermissionManager::UNKNOWN_ACTION) &&
(!IsOn(c.mVideo) || videoPerm != nsIPermissionManager::UNKNOWN_ACTION)) {
// All permissions we were about to request already have a saved value.
if (IsOn(c.mAudio) && audioPerm == nsIPermissionManager::DENY_ACTION) {
c.mAudio.SetAsBoolean() = false;
runnable->SetContraints(c);
}
if (IsOn(c.mVideo) && videoPerm == nsIPermissionManager::DENY_ACTION) {
c.mVideo.SetAsBoolean() = false;
runnable->SetContraints(c);
}
if (!IsOn(c.mAudio) && !IsOn(c.mVideo)) {
return runnable->Denied(NS_LITERAL_STRING("PERMISSION_DENIED"));
}
return mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
}
// Ask for user permission, and dispatch runnable (or not) when a response
// is received via an observer notification. Each call is paired with its
// runnable by a GUID.
nsCOMPtr<nsIUUIDGenerator> uuidgen =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Generate a call ID.
nsID id;
rv = uuidgen->GenerateUUIDInPlace(&id);
NS_ENSURE_SUCCESS(rv, rv);
char buffer[NSID_LENGTH];
id.ToProvidedString(buffer);
NS_ConvertUTF8toUTF16 callID(buffer);
// Store the current unarmed runnable w/callbacks.
mActiveCallbacks.Put(callID, runnable);
// Add a WindowID cross-reference so OnNavigation can tear things down
nsTArray<nsString>* array;
if (!mCallIds.Get(windowID, &array)) {
array = new nsTArray<nsString>();
array->AppendElement(callID);
mCallIds.Put(windowID, array);
} else {
array->AppendElement(callID);
}
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
nsRefPtr<GetUserMediaRequest> req = new GetUserMediaRequest(aWindow,
callID, c, isHTTPS);
obs->NotifyObservers(req, "getUserMedia:request", nullptr);
}
return NS_OK;
}
nsresult
MediaManager::GetUserMediaDevices(nsPIDOMWindow* aWindow,
const MediaStreamConstraints& aConstraints,
nsIGetUserMediaDevicesSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnError,
uint64_t aInnerWindowID)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
NS_ENSURE_TRUE(aOnError, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnSuccess, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError(aOnError);
// Check if the preference for using loopback devices is enabled.
nsAdoptingCString loopbackAudioDevice =
Preferences::GetCString("media.audio_loopback_dev");
nsAdoptingCString loopbackVideoDevice =
Preferences::GetCString("media.video_loopback_dev");
nsCOMPtr<nsIRunnable> gUMDRunnable = new GetUserMediaDevicesRunnable(
aConstraints, onSuccess.forget(), onError.forget(),
(aInnerWindowID ? aInnerWindowID : aWindow->WindowID()),
loopbackAudioDevice, loopbackVideoDevice);
mMediaThread->Dispatch(gUMDRunnable, NS_DISPATCH_NORMAL);
return NS_OK;
}
MediaEngine*
MediaManager::GetBackend(uint64_t aWindowId)
{
// Plugin backends as appropriate. The default engine also currently
// includes picture support for Android.
// This IS called off main-thread.
MutexAutoLock lock(mMutex);
if (!mBackend) {
#if defined(MOZ_WEBRTC)
mBackend = new MediaEngineWebRTC(mPrefs);
#else
mBackend = new MediaEngineDefault();
#endif
}
return mBackend;
}
void
MediaManager::OnNavigation(uint64_t aWindowID)
{
NS_ASSERTION(NS_IsMainThread(), "OnNavigation called off main thread");
// Invalidate this window. The runnables check this value before making
// a call to content.
nsTArray<nsString>* callIds;
if (mCallIds.Get(aWindowID, &callIds)) {
for (int i = 0, len = callIds->Length(); i < len; ++i) {
mActiveCallbacks.Remove((*callIds)[i]);
}
mCallIds.Remove(aWindowID);
}
// This is safe since we're on main-thread, and the windowlist can only
// be added to from the main-thread
StreamListeners* listeners = GetWindowListeners(aWindowID);
if (!listeners) {
return;
}
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; i++) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
if (listener->Stream()) { // aka HasBeenActivate()ed
listener->Invalidate();
}
listener->Remove();
}
listeners->Clear();
RemoveWindowID(aWindowID);
// listeners has been deleted
}
void
MediaManager::RemoveFromWindowList(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
{
NS_ASSERTION(NS_IsMainThread(), "RemoveFromWindowList called off main thread");
// This is defined as safe on an inactive GUMCMSListener
aListener->Remove(); // really queues the remove
StreamListeners* listeners = GetWindowListeners(aWindowID);
if (!listeners) {
return;
}
listeners->RemoveElement(aListener);
if (listeners->Length() == 0) {
RemoveWindowID(aWindowID);
// listeners has been deleted here
// get outer windowID
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowID));
if (window) {
nsPIDOMWindow *outer = window->GetOuterWindow();
if (outer) {
uint64_t outerID = outer->WindowID();
// Notify the UI that this window no longer has gUM active
char windowBuffer[32];
PR_snprintf(windowBuffer, sizeof(windowBuffer), "%llu", outerID);
nsString data = NS_ConvertUTF8toUTF16(windowBuffer);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyObservers(nullptr, "recording-window-ended", data.get());
LOG(("Sent recording-window-ended for window %llu (outer %llu)",
aWindowID, outerID));
} else {
LOG(("No outer window for inner %llu", aWindowID));
}
} else {
LOG(("No inner window for %llu", aWindowID));
}
}
}
void
MediaManager::GetPref(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, int32_t *aVal)
{
int32_t temp;
if (aData == nullptr || strcmp(aPref,aData) == 0) {
if (NS_SUCCEEDED(aBranch->GetIntPref(aPref, &temp))) {
*aVal = temp;
}
}
}
void
MediaManager::GetPrefBool(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, bool *aVal)
{
bool temp;
if (aData == nullptr || strcmp(aPref,aData) == 0) {
if (NS_SUCCEEDED(aBranch->GetBoolPref(aPref, &temp))) {
*aVal = temp;
}
}
}
void
MediaManager::GetPrefs(nsIPrefBranch *aBranch, const char *aData)
{
GetPref(aBranch, "media.navigator.video.default_width", aData, &mPrefs.mWidth);
GetPref(aBranch, "media.navigator.video.default_height", aData, &mPrefs.mHeight);
GetPref(aBranch, "media.navigator.video.default_fps", aData, &mPrefs.mFPS);
GetPref(aBranch, "media.navigator.video.default_minfps", aData, &mPrefs.mMinFPS);
}
nsresult
MediaManager::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData)
{
NS_ASSERTION(NS_IsMainThread(), "Observer invoked off the main thread");
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsCOMPtr<nsIPrefBranch> branch( do_QueryInterface(aSubject) );
if (branch) {
GetPrefs(branch,NS_ConvertUTF16toUTF8(aData).get());
LOG(("%s: %dx%d @%dfps (min %d)", __FUNCTION__,
mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mMinFPS));
}
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
obs->RemoveObserver(this, "xpcom-shutdown");
obs->RemoveObserver(this, "getUserMedia:response:allow");
obs->RemoveObserver(this, "getUserMedia:response:deny");
obs->RemoveObserver(this, "getUserMedia:revoke");
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->RemoveObserver("media.navigator.video.default_width", this);
prefs->RemoveObserver("media.navigator.video.default_height", this);
prefs->RemoveObserver("media.navigator.video.default_fps", this);
prefs->RemoveObserver("media.navigator.video.default_minfps", this);
}
// Close off any remaining active windows.
{
MutexAutoLock lock(mMutex);
GetActiveWindows()->Clear();
mActiveCallbacks.Clear();
mCallIds.Clear();
LOG(("Releasing MediaManager singleton and thread"));
// Note: won't be released immediately as the Observer has a ref to us
sSingleton = nullptr;
if (mMediaThread) {
mMediaThread->Shutdown();
mMediaThread = nullptr;
}
mBackend = nullptr;
}
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:response:allow")) {
nsString key(aData);
nsRefPtr<GetUserMediaRunnable> runnable;
if (!mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
return NS_OK;
}
mActiveCallbacks.Remove(key);
if (aSubject) {
// A particular device or devices were chosen by the user.
// NOTE: does not allow setting a device to null; assumes nullptr
nsCOMPtr<nsISupportsArray> array(do_QueryInterface(aSubject));
MOZ_ASSERT(array);
uint32_t len = 0;
array->Count(&len);
MOZ_ASSERT(len);
if (!len) {
// neither audio nor video were selected
runnable->Denied(NS_LITERAL_STRING("PERMISSION_DENIED"));
return NS_OK;
}
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> supports;
array->GetElementAt(i,getter_AddRefs(supports));
nsCOMPtr<nsIMediaDevice> device(do_QueryInterface(supports));
MOZ_ASSERT(device); // shouldn't be returning anything else...
if (device) {
nsString type;
device->GetType(type);
if (type.EqualsLiteral("video")) {
runnable->SetVideoDevice(static_cast<VideoDevice*>(device.get()));
} else if (type.EqualsLiteral("audio")) {
runnable->SetAudioDevice(static_cast<AudioDevice*>(device.get()));
} else {
NS_WARNING("Unknown device type in getUserMedia");
}
}
}
}
// Reuse the same thread to save memory.
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:response:deny")) {
nsString errorMessage(NS_LITERAL_STRING("PERMISSION_DENIED"));
if (aSubject) {
nsCOMPtr<nsISupportsString> msg(do_QueryInterface(aSubject));
MOZ_ASSERT(msg);
msg->GetData(errorMessage);
if (errorMessage.IsEmpty())
errorMessage.AssignLiteral(MOZ_UTF16("UNKNOWN_ERROR"));
}
nsString key(aData);
nsRefPtr<GetUserMediaRunnable> runnable;
if (!mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
return NS_OK;
}
mActiveCallbacks.Remove(key);
runnable->Denied(errorMessage);
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:revoke")) {
nsresult rv;
uint64_t windowID = nsString(aData).ToInteger64(&rv);
MOZ_ASSERT(NS_SUCCEEDED(rv));
if (NS_SUCCEEDED(rv)) {
LOG(("Revoking MediaCapture access for window %llu",windowID));
OnNavigation(windowID);
}
return NS_OK;
}
#ifdef MOZ_WIDGET_GONK
else if (!strcmp(aTopic, "phone-state-changed")) {
nsString state(aData);
nsresult rv;
uint32_t phoneState = state.ToInteger(&rv);
if (NS_SUCCEEDED(rv) && phoneState == nsIAudioManager::PHONE_STATE_IN_CALL) {
StopMediaStreams();
}
return NS_OK;
}
#endif
return NS_OK;
}
static PLDHashOperator
WindowsHashToArrayFunc (const uint64_t& aId,
StreamListeners* aData,
void *userArg)
{
nsISupportsArray *array =
static_cast<nsISupportsArray *>(userArg);
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aId));
MOZ_ASSERT(window);
if (window) {
// mActiveWindows contains both windows that have requested device
// access and windows that are currently capturing media. We want
// to return only the latter. See bug 975177.
bool capturing = false;
if (aData) {
uint32_t length = aData->Length();
for (uint32_t i = 0; i < length; ++i) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
aData->ElementAt(i);
if (listener->CapturingVideo() || listener->CapturingAudio()) {
capturing = true;
break;
}
}
}
if (capturing)
array->AppendElement(window);
}
return PL_DHASH_NEXT;
}
nsresult
MediaManager::GetActiveMediaCaptureWindows(nsISupportsArray **aArray)
{
MOZ_ASSERT(aArray);
nsISupportsArray *array;
nsresult rv = NS_NewISupportsArray(&array); // AddRefs
if (NS_FAILED(rv))
return rv;
mActiveWindows.EnumerateRead(WindowsHashToArrayFunc, array);
*aArray = array;
return NS_OK;
}
NS_IMETHODIMP
MediaManager::MediaCaptureWindowState(nsIDOMWindow* aWindow, bool* aVideo,
bool* aAudio)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
*aVideo = false;
*aAudio = false;
nsresult rv = MediaCaptureWindowStateInternal(aWindow, aVideo, aAudio);
#ifdef DEBUG
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
LOG(("%s: window %lld capturing %s %s", __FUNCTION__, piWin ? piWin->WindowID() : -1,
*aVideo ? "video" : "", *aAudio ? "audio" : ""));
#endif
return rv;
}
nsresult
MediaManager::MediaCaptureWindowStateInternal(nsIDOMWindow* aWindow, bool* aVideo,
bool* aAudio)
{
// We need to return the union of all streams in all innerwindows that
// correspond to that outerwindow.
// Iterate the docshell tree to find all the child windows, find
// all the listeners for each one, get the booleans, and merge the
// results.
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
if (piWin) {
if (piWin->GetCurrentInnerWindow() || piWin->IsInnerWindow()) {
uint64_t windowID;
if (piWin->GetCurrentInnerWindow()) {
windowID = piWin->GetCurrentInnerWindow()->WindowID();
} else {
windowID = piWin->WindowID();
}
StreamListeners* listeners = GetActiveWindows()->Get(windowID);
if (listeners) {
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; ++i) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
if (listener->CapturingVideo()) {
*aVideo = true;
}
if (listener->CapturingAudio()) {
*aAudio = true;
}
if (*aAudio && *aVideo) {
return NS_OK; // no need to continue iterating
}
}
}
}
// iterate any children of *this* window (iframes, etc)
nsCOMPtr<nsIDocShell> docShell = piWin->GetDocShell();
if (docShell) {
int32_t i, count;
docShell->GetChildCount(&count);
for (i = 0; i < count; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
docShell->GetChildAt(i, getter_AddRefs(item));
nsCOMPtr<nsPIDOMWindow> win = item ? item->GetWindow() : nullptr;
MediaCaptureWindowStateInternal(win, aVideo, aAudio);
if (*aAudio && *aVideo) {
return NS_OK; // no need to continue iterating
}
}
}
}
return NS_OK;
}
void
MediaManager::StopMediaStreams()
{
nsCOMPtr<nsISupportsArray> array;
GetActiveMediaCaptureWindows(getter_AddRefs(array));
uint32_t len;
array->Count(&len);
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> window;
array->GetElementAt(i, getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(window));
if (win) {
OnNavigation(win->WindowID());
}
}
}
// Can be invoked from EITHER MainThread or MSG thread
void
GetUserMediaCallbackMediaStreamListener::Invalidate()
{
nsRefPtr<MediaOperationRunnable> runnable;
// We can't take a chance on blocking here, so proxy this to another
// thread.
// Pass a ref to us (which is threadsafe) so it can query us for the
// source stream info.
runnable = new MediaOperationRunnable(MEDIA_STOP,
this, nullptr, nullptr,
mAudioSource, mVideoSource,
mFinished, mWindowID, nullptr);
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
}
// Called from the MediaStreamGraph thread
void
GetUserMediaCallbackMediaStreamListener::NotifyFinished(MediaStreamGraph* aGraph)
{
mFinished = true;
Invalidate(); // we know it's been activated
NS_DispatchToMainThread(new GetUserMediaListenerRemove(mWindowID, this));
}
// Called from the MediaStreamGraph thread
// this can be in response to our own RemoveListener() (via ::Remove()), or
// because the DOM GC'd the DOMLocalMediaStream/etc we're attached to.
void
GetUserMediaCallbackMediaStreamListener::NotifyRemoved(MediaStreamGraph* aGraph)
{
{
MutexAutoLock lock(mLock); // protect access to mRemoved
MM_LOG(("Listener removed by DOM Destroy(), mFinished = %d", (int) mFinished));
mRemoved = true;
}
if (!mFinished) {
NotifyFinished(aGraph);
}
}
NS_IMETHODIMP
GetUserMediaNotificationEvent::Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
// Make sure mStream is cleared and our reference to the DOMMediaStream
// is dropped on the main thread, no matter what happens in this method.
// Otherwise this object might be destroyed off the main thread,
// releasing DOMMediaStream off the main thread, which is not allowed.
nsRefPtr<DOMMediaStream> stream = mStream.forget();
nsString msg;
switch (mStatus) {
case STARTING:
msg = NS_LITERAL_STRING("starting");
stream->OnTracksAvailable(mOnTracksAvailableCallback.forget());
break;
case STOPPING:
msg = NS_LITERAL_STRING("shutdown");
if (mListener) {
mListener->SetStopped();
}
break;
}
nsCOMPtr<nsPIDOMWindow> window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
return MediaManager::NotifyRecordingStatusChange(window, msg, mIsAudio, mIsVideo);
}
} // namespace mozilla
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