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gecko-dev/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 "AudioCaptureTrack.h"
#include "AudioDeviceInfo.h"
#include "AudioStreamTrack.h"
#include "CubebDeviceEnumerator.h"
#include "MediaTimer.h"
#include "MediaTrackConstraints.h"
#include "MediaTrackGraphImpl.h"
#include "MediaTrackListener.h"
#include "VideoStreamTrack.h"
#include "VideoUtils.h"
#include "mozilla/Base64.h"
#include "mozilla/MozPromise.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/PeerIdentity.h"
#include "mozilla/PermissionDelegateHandler.h"
#include "mozilla/Sprintf.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Types.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/FeaturePolicyUtils.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/GetUserMediaRequestBinding.h"
#include "mozilla/dom/MediaDeviceInfo.h"
#include "mozilla/dom/MediaDevices.h"
#include "mozilla/dom/MediaDevicesBinding.h"
#include "mozilla/dom/MediaStreamBinding.h"
#include "mozilla/dom/MediaStreamTrackBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/WindowContext.h"
#include "mozilla/dom/WindowGlobalChild.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/media/MediaChild.h"
#include "mozilla/media/MediaTaskUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsArray.h"
#include "nsContentUtils.h"
#include "nsGlobalWindow.h"
#include "nsHashPropertyBag.h"
#include "nsICryptoHMAC.h"
#include "nsIEventTarget.h"
#include "nsIKeyModule.h"
#include "nsIPermissionManager.h"
#include "nsIUUIDGenerator.h"
#include "nsJSUtils.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsPIDOMWindow.h"
#include "nsProxyRelease.h"
#include "nspr.h"
#include "nss.h"
#include "pk11pub.h"
/* Using WebRTC backend on Desktops (Mac, Windows, Linux), otherwise default */
#include "MediaEngineDefault.h"
#if defined(MOZ_WEBRTC)
# include "MediaEngineWebRTC.h"
# include "MediaEngineWebRTCAudio.h"
# include "browser_logging/WebRtcLog.h"
# include "modules/audio_processing/include/audio_processing.h"
#endif
#if defined(XP_WIN)
# include <iphlpapi.h>
# include <objbase.h>
# include <tchar.h>
# include <winsock2.h>
# include "mozilla/WindowsVersion.h"
#endif
// A specialization of nsMainThreadPtrHolder for
// mozilla::dom::CallbackObjectHolder. See documentation for
// nsMainThreadPtrHolder in nsProxyRelease.h. This specialization lets us avoid
// wrapping the CallbackObjectHolder into a separate refcounted object.
template <class WebIDLCallbackT, class XPCOMCallbackT>
class nsMainThreadPtrHolder<
mozilla::dom::CallbackObjectHolder<WebIDLCallbackT, XPCOMCallbackT>>
final {
typedef mozilla::dom::CallbackObjectHolder<WebIDLCallbackT, XPCOMCallbackT>
Holder;
public:
nsMainThreadPtrHolder(const char* aName, Holder&& aHolder)
: mHolder(std::move(aHolder))
#ifndef RELEASE_OR_BETA
,
mName(aName)
#endif
{
MOZ_ASSERT(NS_IsMainThread());
}
private:
// We can be released on any thread.
~nsMainThreadPtrHolder() {
if (NS_IsMainThread()) {
mHolder.Reset();
} else if (mHolder.GetISupports()) {
nsCOMPtr<nsIEventTarget> target = do_GetMainThread();
MOZ_ASSERT(target);
NS_ProxyRelease(
#ifdef RELEASE_OR_BETA
nullptr,
#else
mName,
#endif
target, mHolder.Forget());
}
}
public:
Holder* get() {
// Nobody should be touching the raw pointer off-main-thread.
if (MOZ_UNLIKELY(!NS_IsMainThread())) {
NS_ERROR("Can't dereference nsMainThreadPtrHolder off main thread");
MOZ_CRASH();
}
return &mHolder;
}
bool operator!() const { return !mHolder; }
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsMainThreadPtrHolder<Holder>)
private:
// Our holder.
Holder mHolder;
#ifndef RELEASE_OR_BETA
const char* mName = nullptr;
#endif
// Copy constructor and operator= not implemented. Once constructed, the
// holder is immutable.
Holder& operator=(const nsMainThreadPtrHolder& aOther) = delete;
nsMainThreadPtrHolder(const nsMainThreadPtrHolder& aOther) = delete;
};
namespace mozilla {
LazyLogModule gMediaManagerLog("MediaManager");
#define LOG(...) MOZ_LOG(gMediaManagerLog, LogLevel::Debug, (__VA_ARGS__))
class GetUserMediaStreamTask;
class LocalTrackSource;
class SelectAudioOutputTask;
using dom::BFCacheStatus;
using dom::CallerType;
using dom::ConstrainDOMStringParameters;
using dom::ConstrainDoubleRange;
using dom::ConstrainLongRange;
using dom::DisplayMediaStreamConstraints;
using dom::Document;
using dom::Element;
using dom::FeaturePolicyUtils;
using dom::File;
using dom::GetUserMediaRequest;
using dom::MediaDeviceKind;
using dom::MediaDevices;
using dom::MediaSourceEnum;
using dom::MediaStreamConstraints;
using dom::MediaStreamError;
using dom::MediaStreamTrack;
using dom::MediaStreamTrackSource;
using dom::MediaTrackConstraints;
using dom::MediaTrackConstraintSet;
using dom::MediaTrackSettings;
using dom::OwningBooleanOrMediaTrackConstraints;
using dom::OwningStringOrStringSequence;
using dom::OwningStringOrStringSequenceOrConstrainDOMStringParameters;
using dom::Promise;
using dom::Sequence;
using dom::UserActivation;
using dom::WindowGlobalChild;
using media::NewRunnableFrom;
using media::NewTaskFrom;
using media::Refcountable;
static Atomic<bool> sHasShutdown;
struct DeviceState {
DeviceState(RefPtr<MediaDevice> aDevice,
RefPtr<LocalTrackSource> aTrackSource, bool aOffWhileDisabled)
: mOffWhileDisabled(aOffWhileDisabled),
mDevice(std::move(aDevice)),
mTrackSource(std::move(aTrackSource)) {
MOZ_ASSERT(mDevice);
MOZ_ASSERT(mTrackSource);
}
// true if we have stopped mDevice, this is a terminal state.
// MainThread only.
bool mStopped = false;
// true if mDevice is currently enabled.
// A device must be both enabled and unmuted to be turned on and capturing.
// MainThread only.
bool mDeviceEnabled = false;
// true if mDevice is currently muted.
// A device that is either muted or disabled is turned off and not capturing.
// MainThread only.
bool mDeviceMuted;
// true if the application has currently enabled mDevice.
// MainThread only.
bool mTrackEnabled = false;
// Time when the application last enabled mDevice.
// MainThread only.
TimeStamp mTrackEnabledTime;
// true if an operation to Start() or Stop() mDevice has been dispatched to
// the media thread and is not finished yet.
// MainThread only.
bool mOperationInProgress = false;
// true if we are allowed to turn off the underlying source while all tracks
// are disabled. Only affects disabling; always turns off on user-agent mute.
// MainThread only.
bool mOffWhileDisabled = false;
// Timer triggered by a MediaStreamTrackSource signaling that all tracks got
// disabled. When the timer fires we initiate Stop()ing mDevice.
// If set we allow dynamically stopping and starting mDevice.
// Any thread.
const RefPtr<MediaTimer> mDisableTimer = new MediaTimer();
// The underlying device we keep state for. Always non-null.
// Threadsafe access, but see method declarations for individual constraints.
const RefPtr<MediaDevice> mDevice;
// The MediaStreamTrackSource for any tracks (original and clones) originating
// from this device. Always non-null. Threadsafe access, but see method
// declarations for individual constraints.
const RefPtr<LocalTrackSource> mTrackSource;
};
/**
* This mimics the capture state from nsIMediaManagerService.
*/
enum class CaptureState : uint16_t {
Off = nsIMediaManagerService::STATE_NOCAPTURE,
Enabled = nsIMediaManagerService::STATE_CAPTURE_ENABLED,
Disabled = nsIMediaManagerService::STATE_CAPTURE_DISABLED,
};
static CaptureState CombineCaptureState(CaptureState aFirst,
CaptureState aSecond) {
if (aFirst == CaptureState::Enabled || aSecond == CaptureState::Enabled) {
return CaptureState::Enabled;
}
if (aFirst == CaptureState::Disabled || aSecond == CaptureState::Disabled) {
return CaptureState::Disabled;
}
MOZ_ASSERT(aFirst == CaptureState::Off);
MOZ_ASSERT(aSecond == CaptureState::Off);
return CaptureState::Off;
}
static uint16_t FromCaptureState(CaptureState aState) {
MOZ_ASSERT(aState == CaptureState::Off || aState == CaptureState::Enabled ||
aState == CaptureState::Disabled);
return static_cast<uint16_t>(aState);
}
void MediaManager::CallOnError(GetUserMediaErrorCallback& aCallback,
MediaStreamError& aError) {
aCallback.Call(aError);
}
void MediaManager::CallOnSuccess(GetUserMediaSuccessCallback& aCallback,
DOMMediaStream& aStream) {
aCallback.Call(aStream);
}
/**
* DeviceListener has threadsafe refcounting for use across the main, media and
* MTG threads. But it has a non-threadsafe SupportsWeakPtr for WeakPtr usage
* only from main thread, to ensure that garbage- and cycle-collected objects
* don't hold a reference to it during late shutdown.
*/
class DeviceListener : public SupportsWeakPtr {
public:
typedef MozPromise<bool /* aIgnored */, RefPtr<MediaMgrError>, true>
DeviceListenerPromise;
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_MAIN_THREAD(
DeviceListener)
DeviceListener();
/**
* Registers this device listener as belonging to the given window listener.
* Stop() must be called on registered DeviceListeners before destruction.
*/
void Register(GetUserMediaWindowListener* aListener);
/**
* Marks this listener as active and creates the internal device state.
*/
void Activate(RefPtr<MediaDevice> aDevice,
RefPtr<LocalTrackSource> aTrackSource, bool aStartMuted);
/**
* Posts a task to initialize and start the associated device.
*/
RefPtr<DeviceListenerPromise> InitializeAsync();
/**
* Posts a task to stop the device associated with this DeviceListener and
* notifies the associated window listener that a track was stopped.
*
* This will also clean up the weak reference to the associated window
* listener, and tell the window listener to remove its hard reference to this
* DeviceListener, so any caller will need to keep its own hard ref.
*/
void Stop();
/**
* Gets the main thread MediaTrackSettings from the MediaEngineSource
* associated with aTrack.
*/
void GetSettings(MediaTrackSettings& aOutSettings) const;
/**
* Posts a task to set the enabled state of the device associated with this
* DeviceListener to aEnabled and notifies the associated window listener that
* a track's state has changed.
*
* Turning the hardware off while the device is disabled is supported for:
* - Camera (enabled by default, controlled by pref
* "media.getusermedia.camera.off_while_disabled.enabled")
* - Microphone (disabled by default, controlled by pref
* "media.getusermedia.microphone.off_while_disabled.enabled")
* Screen-, app-, or windowsharing is not supported at this time.
*
* The behavior is also different between disabling and enabling a device.
* While enabling is immediate, disabling only happens after a delay.
* This is now defaulting to 3 seconds but can be overriden by prefs:
* - "media.getusermedia.camera.off_while_disabled.delay_ms" and
* - "media.getusermedia.microphone.off_while_disabled.delay_ms".
*
* The delay is in place to prevent misuse by malicious sites. If a track is
* re-enabled before the delay has passed, the device will not be touched
* until another disable followed by the full delay happens.
*/
void SetDeviceEnabled(bool aEnabled);
/**
* Posts a task to set the muted state of the device associated with this
* DeviceListener to aMuted and notifies the associated window listener that a
* track's state has changed.
*
* Turning the hardware off while the device is muted is supported for:
* - Camera (enabled by default, controlled by pref
* "media.getusermedia.camera.off_while_disabled.enabled")
* - Microphone (disabled by default, controlled by pref
* "media.getusermedia.microphone.off_while_disabled.enabled")
* Screen-, app-, or windowsharing is not supported at this time.
*/
void SetDeviceMuted(bool aMuted);
/**
* Mutes or unmutes the associated video device if it is a camera.
*/
void MuteOrUnmuteCamera(bool aMute);
void MuteOrUnmuteMicrophone(bool aMute);
MediaDevice* GetDevice() const {
return mDeviceState ? mDeviceState->mDevice.get() : nullptr;
}
bool Activated() const { return static_cast<bool>(mDeviceState); }
bool Stopped() const { return mStopped; }
bool CapturingVideo() const;
bool CapturingAudio() const;
CaptureState CapturingSource(MediaSourceEnum aSource) const;
RefPtr<DeviceListenerPromise> ApplyConstraints(
const MediaTrackConstraints& aConstraints, CallerType aCallerType);
PrincipalHandle GetPrincipalHandle() const;
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t amount = aMallocSizeOf(this);
// Assume mPrincipalHandle refers to a principal owned elsewhere.
// DeviceState does not have support for memory accounting.
return amount;
}
private:
virtual ~DeviceListener() {
MOZ_ASSERT(mStopped);
MOZ_ASSERT(!mWindowListener);
}
using DeviceOperationPromise =
MozPromise<nsresult, bool, /* IsExclusive = */ true>;
/**
* Posts a task to start or stop the device associated with aTrack, based on
* a passed-in boolean. Private method used by SetDeviceEnabled and
* SetDeviceMuted.
*/
RefPtr<DeviceOperationPromise> UpdateDevice(bool aOn);
// true after this listener has had all devices stopped. MainThread only.
bool mStopped;
// never ever indirect off this; just for assertions
PRThread* mMainThreadCheck;
// Set in Register() on main thread, then read from any thread.
PrincipalHandle mPrincipalHandle;
// Weak pointer to the window listener that owns us. MainThread only.
GetUserMediaWindowListener* mWindowListener;
// Accessed from MediaTrackGraph thread, MediaManager thread, and MainThread
// No locking needed as it's set on Activate() and never assigned to again.
UniquePtr<DeviceState> mDeviceState;
};
/**
* This class represents a WindowID and handles all MediaTrackListeners
* (here subclassed as DeviceListeners) used to feed GetUserMedia tracks.
* It proxies feedback from them into messages for browser chrome.
* The DeviceListeners are used to Start() and Stop() the underlying
* MediaEngineSource when MediaStreams are assigned and deassigned in content.
*/
class GetUserMediaWindowListener {
friend MediaManager;
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GetUserMediaWindowListener)
// Create in an inactive state
GetUserMediaWindowListener(uint64_t aWindowID,
const PrincipalHandle& aPrincipalHandle)
: mWindowID(aWindowID),
mPrincipalHandle(aPrincipalHandle),
mChromeNotificationTaskPosted(false) {}
/**
* Registers an inactive gUM device listener for this WindowListener.
*/
void Register(RefPtr<DeviceListener> aListener) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aListener);
MOZ_ASSERT(!aListener->Activated());
MOZ_ASSERT(!mInactiveListeners.Contains(aListener), "Already registered");
MOZ_ASSERT(!mActiveListeners.Contains(aListener), "Already activated");
aListener->Register(this);
mInactiveListeners.AppendElement(std::move(aListener));
}
/**
* Activates an already registered and inactive gUM device listener for this
* WindowListener.
*/
void Activate(RefPtr<DeviceListener> aListener, RefPtr<MediaDevice> aDevice,
RefPtr<LocalTrackSource> aTrackSource) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aListener);
MOZ_ASSERT(!aListener->Activated());
MOZ_ASSERT(mInactiveListeners.Contains(aListener),
"Must be registered to activate");
MOZ_ASSERT(!mActiveListeners.Contains(aListener), "Already activated");
bool muted = false;
if (aDevice->mKind == MediaDeviceKind::Videoinput) {
muted = mCamerasAreMuted;
} else if (aDevice->mKind == MediaDeviceKind::Audioinput) {
muted = mMicrophonesAreMuted;
} else {
MOZ_CRASH("Unexpected device kind");
}
mInactiveListeners.RemoveElement(aListener);
aListener->Activate(std::move(aDevice), std::move(aTrackSource), muted);
mActiveListeners.AppendElement(std::move(aListener));
}
/**
* Removes all DeviceListeners from this window listener.
* Removes this window listener from the list of active windows, so callers
* need to make sure to hold a strong reference.
*/
void RemoveAll() {
MOZ_ASSERT(NS_IsMainThread());
for (auto& l : mInactiveListeners.Clone()) {
Remove(l);
}
for (auto& l : mActiveListeners.Clone()) {
Remove(l);
}
MOZ_ASSERT(mInactiveListeners.Length() == 0);
MOZ_ASSERT(mActiveListeners.Length() == 0);
MediaManager* mgr = MediaManager::GetIfExists();
if (!mgr) {
MOZ_ASSERT(false, "MediaManager should stay until everything is removed");
return;
}
GetUserMediaWindowListener* windowListener =
mgr->GetWindowListener(mWindowID);
if (!windowListener) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
auto* globalWindow = nsGlobalWindowInner::GetInnerWindowWithId(mWindowID);
if (globalWindow) {
auto req = MakeRefPtr<GetUserMediaRequest>(
globalWindow, VoidString(), VoidString(),
UserActivation::IsHandlingUserInput());
obs->NotifyWhenScriptSafe(req, "recording-device-stopped", nullptr);
}
return;
}
MOZ_ASSERT(windowListener == this,
"There should only be one window listener per window ID");
LOG("GUMWindowListener %p removing windowID %" PRIu64, this, mWindowID);
mgr->RemoveWindowID(mWindowID);
}
/**
* Removes a listener from our lists. Safe to call without holding a hard
* reference. That said, you'll still want to iterate on a copy of said lists,
* if you end up calling this method (or methods that may call this method) in
* the loop, to avoid inadvertently skipping members.
*
* For use only from GetUserMediaWindowListener and DeviceListener.
*/
bool Remove(RefPtr<DeviceListener> aListener) {
// We refcount aListener on entry since we're going to proxy-release it
// below to prevent the refcount going to zero on callers who might be
// inside the listener, but operating without a hard reference to self.
MOZ_ASSERT(NS_IsMainThread());
if (!mInactiveListeners.RemoveElement(aListener) &&
!mActiveListeners.RemoveElement(aListener)) {
return false;
}
MOZ_ASSERT(!mInactiveListeners.Contains(aListener),
"A DeviceListener should only be once in one of "
"mInactiveListeners and mActiveListeners");
MOZ_ASSERT(!mActiveListeners.Contains(aListener),
"A DeviceListener should only be once in one of "
"mInactiveListeners and mActiveListeners");
LOG("GUMWindowListener %p stopping DeviceListener %p.", this,
aListener.get());
aListener->Stop();
if (MediaDevice* removedDevice = aListener->GetDevice()) {
bool revokePermission = true;
nsString removedRawId;
nsString removedSourceType;
removedDevice->GetRawId(removedRawId);
removedDevice->GetMediaSource(removedSourceType);
for (const auto& l : mActiveListeners) {
if (MediaDevice* device = l->GetDevice()) {
nsString rawId;
device->GetRawId(rawId);
if (removedRawId.Equals(rawId)) {
revokePermission = false;
break;
}
}
}
if (revokePermission) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(mWindowID);
auto req = MakeRefPtr<GetUserMediaRequest>(
window, removedRawId, removedSourceType,
UserActivation::IsHandlingUserInput());
obs->NotifyWhenScriptSafe(req, "recording-device-stopped", nullptr);
}
}
if (mInactiveListeners.Length() == 0 && mActiveListeners.Length() == 0) {
LOG("GUMWindowListener %p Removed last DeviceListener. Cleaning up.",
this);
RemoveAll();
}
nsCOMPtr<nsIEventTarget> mainTarget = do_GetMainThread();
// To allow being invoked by callers not holding a strong reference to self,
// hold the listener alive until the stack has unwound, by always
// dispatching a runnable (aAlwaysProxy = true)
NS_ProxyRelease(__func__, mainTarget, aListener.forget(), true);
return true;
}
/**
* Stops all screen/window/audioCapture sharing, but not camera or microphone.
*/
void StopSharing();
void StopRawID(const nsString& removedDeviceID);
void MuteOrUnmuteCameras(bool aMute);
void MuteOrUnmuteMicrophones(bool aMute);
/**
* Called by one of our DeviceListeners when one of its tracks has changed so
* that chrome state is affected.
* Schedules an event for the next stable state to update chrome.
*/
void ChromeAffectingStateChanged();
/**
* Called in stable state to send a notification to update chrome.
*/
void NotifyChrome();
bool CapturingVideo() const {
MOZ_ASSERT(NS_IsMainThread());
for (auto& l : mActiveListeners) {
if (l->CapturingVideo()) {
return true;
}
}
return false;
}
bool CapturingAudio() const {
MOZ_ASSERT(NS_IsMainThread());
for (auto& l : mActiveListeners) {
if (l->CapturingAudio()) {
return true;
}
}
return false;
}
CaptureState CapturingSource(MediaSourceEnum aSource) const {
MOZ_ASSERT(NS_IsMainThread());
CaptureState result = CaptureState::Off;
for (auto& l : mActiveListeners) {
result = CombineCaptureState(result, l->CapturingSource(aSource));
}
return result;
}
void GetDevices(
const RefPtr<MediaManager::MediaDeviceSetRefCnt>& aOutDevices) {
for (auto& l : mActiveListeners) {
aOutDevices->AppendElement(l->GetDevice());
}
}
uint64_t WindowID() const { return mWindowID; }
PrincipalHandle GetPrincipalHandle() const { return mPrincipalHandle; }
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t amount = aMallocSizeOf(this);
// Assume mPrincipalHandle refers to a principal owned elsewhere.
amount += mInactiveListeners.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const RefPtr<DeviceListener>& listener : mInactiveListeners) {
amount += listener->SizeOfIncludingThis(aMallocSizeOf);
}
amount += mActiveListeners.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (const RefPtr<DeviceListener>& listener : mActiveListeners) {
amount += listener->SizeOfIncludingThis(aMallocSizeOf);
}
return amount;
}
private:
~GetUserMediaWindowListener() {
MOZ_ASSERT(mInactiveListeners.Length() == 0,
"Inactive listeners should already be removed");
MOZ_ASSERT(mActiveListeners.Length() == 0,
"Active listeners should already be removed");
}
uint64_t mWindowID;
const PrincipalHandle mPrincipalHandle;
// true if we have scheduled a task to notify chrome in the next stable state.
// The task will reset this to false. MainThread only.
bool mChromeNotificationTaskPosted;
nsTArray<RefPtr<DeviceListener>> mInactiveListeners;
nsTArray<RefPtr<DeviceListener>> mActiveListeners;
// Whether camera and microphone access in this window are currently
// User Agent (UA) muted. When true, new and cloned tracks must start
// out muted, to avoid JS circumventing UA mute. Per-camera and
// per-microphone UA muting is not supported.
bool mCamerasAreMuted = false;
bool mMicrophonesAreMuted = false;
};
class LocalTrackSource : public MediaStreamTrackSource {
public:
LocalTrackSource(nsIPrincipal* aPrincipal, const nsString& aLabel,
const RefPtr<DeviceListener>& aListener,
MediaSourceEnum aSource, MediaTrack* aTrack,
RefPtr<PeerIdentity> aPeerIdentity)
: MediaStreamTrackSource(aPrincipal, aLabel),
mSource(aSource),
mTrack(aTrack),
mPeerIdentity(std::move(aPeerIdentity)),
mListener(aListener.get()) {}
MediaSourceEnum GetMediaSource() const override { return mSource; }
const PeerIdentity* GetPeerIdentity() const override { return mPeerIdentity; }
RefPtr<MediaStreamTrackSource::ApplyConstraintsPromise> ApplyConstraints(
const MediaTrackConstraints& aConstraints,
CallerType aCallerType) override {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown || !mListener) {
// Track has been stopped, or we are in shutdown. In either case
// there's no observable outcome, so pretend we succeeded.
return MediaStreamTrackSource::ApplyConstraintsPromise::CreateAndResolve(
false, __func__);
}
return mListener->ApplyConstraints(aConstraints, aCallerType);
}
void GetSettings(MediaTrackSettings& aOutSettings) override {
if (mListener) {
mListener->GetSettings(aOutSettings);
}
}
void Stop() override {
if (mListener) {
mListener->Stop();
mListener = nullptr;
}
if (!mTrack->IsDestroyed()) {
mTrack->Destroy();
}
}
void Disable() override {
if (mListener) {
mListener->SetDeviceEnabled(false);
}
}
void Enable() override {
if (mListener) {
mListener->SetDeviceEnabled(true);
}
}
void Mute() {
MutedChanged(true);
mTrack->SetDisabledTrackMode(DisabledTrackMode::SILENCE_BLACK);
}
void Unmute() {
MutedChanged(false);
mTrack->SetDisabledTrackMode(DisabledTrackMode::ENABLED);
}
const MediaSourceEnum mSource;
const RefPtr<MediaTrack> mTrack;
const RefPtr<const PeerIdentity> mPeerIdentity;
protected:
~LocalTrackSource() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mTrack->IsDestroyed());
}
// This is a weak pointer to avoid having the DeviceListener (which may
// have references to threads and threadpools) kept alive by DOM-objects
// that may have ref-cycles and thus are released very late during
// shutdown, even after xpcom-shutdown-threads. See bug 1351655 for what
// can happen.
WeakPtr<DeviceListener> mListener;
};
class AudioCaptureTrackSource : public LocalTrackSource {
public:
AudioCaptureTrackSource(nsIPrincipal* aPrincipal, nsPIDOMWindowInner* aWindow,
const nsString& aLabel,
AudioCaptureTrack* aAudioCaptureTrack,
RefPtr<PeerIdentity> aPeerIdentity)
: LocalTrackSource(aPrincipal, aLabel, nullptr,
MediaSourceEnum::AudioCapture, aAudioCaptureTrack,
std::move(aPeerIdentity)),
mWindow(aWindow),
mAudioCaptureTrack(aAudioCaptureTrack) {
mAudioCaptureTrack->Start();
mAudioCaptureTrack->Graph()->RegisterCaptureTrackForWindow(
mWindow->WindowID(), mAudioCaptureTrack);
mWindow->SetAudioCapture(true);
}
void Stop() override {
MOZ_ASSERT(NS_IsMainThread());
if (!mAudioCaptureTrack->IsDestroyed()) {
MOZ_ASSERT(mWindow);
mWindow->SetAudioCapture(false);
mAudioCaptureTrack->Graph()->UnregisterCaptureTrackForWindow(
mWindow->WindowID());
mWindow = nullptr;
}
// LocalTrackSource destroys the track.
LocalTrackSource::Stop();
MOZ_ASSERT(mAudioCaptureTrack->IsDestroyed());
}
ProcessedMediaTrack* InputTrack() const { return mAudioCaptureTrack.get(); }
protected:
~AudioCaptureTrackSource() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mAudioCaptureTrack->IsDestroyed());
}
RefPtr<nsPIDOMWindowInner> mWindow;
const RefPtr<AudioCaptureTrack> mAudioCaptureTrack;
};
/**
* nsIMediaDevice implementation.
*/
NS_IMPL_ISUPPORTS(MediaDevice, nsIMediaDevice)
MediaDevice::MediaDevice(const RefPtr<MediaEngineSource>& aSource,
const nsString& aName, const nsString& aID,
const nsString& aGroupID, const nsString& aRawID)
: mSource(aSource),
mSinkInfo(nullptr),
mKind((mSource && MediaEngineSource::IsVideo(mSource->GetMediaSource()))
? MediaDeviceKind::Videoinput
: MediaDeviceKind::Audioinput),
mScary(mSource->GetScary()),
mIsFake(mSource->IsFake()),
mType(
NS_ConvertASCIItoUTF16(dom::MediaDeviceKindValues::GetString(mKind))),
mName(aName),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID),
mRawName(aName) {
MOZ_ASSERT(mSource);
}
MediaDevice::MediaDevice(const RefPtr<AudioDeviceInfo>& aAudioDeviceInfo,
const nsString& aID, const nsString& aGroupID,
const nsString& aRawID)
: mSource(nullptr),
mSinkInfo(aAudioDeviceInfo),
mKind(mSinkInfo->Type() == AudioDeviceInfo::TYPE_INPUT
? MediaDeviceKind::Audioinput
: MediaDeviceKind::Audiooutput),
mScary(false),
mIsFake(false),
mType(
NS_ConvertASCIItoUTF16(dom::MediaDeviceKindValues::GetString(mKind))),
mName(mSinkInfo->Name()),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID),
mRawName(mSinkInfo->Name()) {
// For now this ctor is used only for Audiooutput.
// It could be used for Audioinput and Videoinput
// when we do not instantiate a MediaEngineSource
// during EnumerateDevices.
MOZ_ASSERT(mKind == MediaDeviceKind::Audiooutput);
MOZ_ASSERT(mSinkInfo);
}
MediaDevice::MediaDevice(const RefPtr<MediaDevice>& aOther, const nsString& aID,
const nsString& aGroupID, const nsString& aRawID,
const nsString& aRawGroupID)
: MediaDevice(aOther, aID, aGroupID, aRawID, aRawGroupID, aOther->mName) {}
MediaDevice::MediaDevice(const RefPtr<MediaDevice>& aOther, const nsString& aID,
const nsString& aGroupID, const nsString& aRawID,
const nsString& aRawGroupID, const nsString& aName)
: mSource(aOther->mSource),
mSinkInfo(aOther->mSinkInfo),
mKind(aOther->mKind),
mScary(aOther->mScary),
mIsFake(aOther->mIsFake),
mType(aOther->mType),
mName(aName),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID),
mRawGroupID(aRawGroupID),
mRawName(aOther->mRawName) {
MOZ_ASSERT(aOther);
}
/**
* Helper functions that implement the constraints algorithm from
* http://dev.w3.org/2011/webrtc/editor/getusermedia.html#methods-5
*/
/* static */
bool MediaDevice::StringsContain(const OwningStringOrStringSequence& aStrings,
nsString aN) {
return aStrings.IsString() ? aStrings.GetAsString() == aN
: aStrings.GetAsStringSequence().Contains(aN);
}
/* static */
uint32_t MediaDevice::FitnessDistance(
nsString aN, const ConstrainDOMStringParameters& aParams) {
if (aParams.mExact.WasPassed() &&
!StringsContain(aParams.mExact.Value(), aN)) {
return UINT32_MAX;
}
if (aParams.mIdeal.WasPassed() &&
!StringsContain(aParams.mIdeal.Value(), aN)) {
return 1;
}
return 0;
}
// Binding code doesn't templatize well...
/* static */
uint32_t MediaDevice::FitnessDistance(
nsString aN,
const OwningStringOrStringSequenceOrConstrainDOMStringParameters&
aConstraint) {
if (aConstraint.IsString()) {
ConstrainDOMStringParameters params;
params.mIdeal.Construct();
params.mIdeal.Value().SetAsString() = aConstraint.GetAsString();
return FitnessDistance(aN, params);
} else if (aConstraint.IsStringSequence()) {
ConstrainDOMStringParameters params;
params.mIdeal.Construct();
params.mIdeal.Value().SetAsStringSequence() =
aConstraint.GetAsStringSequence();
return FitnessDistance(aN, params);
} else {
return FitnessDistance(aN, aConstraint.GetAsConstrainDOMStringParameters());
}
}
uint32_t MediaDevice::GetBestFitnessDistance(
const nsTArray<const NormalizedConstraintSet*>& aConstraintSets,
CallerType aCallerType) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
bool isChrome = aCallerType == CallerType::System;
const nsString& id = isChrome ? mRawID : mID;
auto type = GetMediaSource();
uint64_t distance = 0;
if (!aConstraintSets.IsEmpty()) {
if (isChrome /* For the screen/window sharing preview */ ||
type == MediaSourceEnum::Camera ||
type == MediaSourceEnum::Microphone) {
distance += uint64_t(MediaConstraintsHelper::FitnessDistance(
Some(id), aConstraintSets[0]->mDeviceId)) +
uint64_t(MediaConstraintsHelper::FitnessDistance(
Some(mGroupID), aConstraintSets[0]->mGroupId));
}
}
if (distance < UINT32_MAX) {
// Forward request to underlying object to interrogate per-mode
// capabilities.
distance += mSource->GetBestFitnessDistance(aConstraintSets);
}
return std::min<uint64_t>(distance, UINT32_MAX);
}
NS_IMETHODIMP
MediaDevice::GetName(nsAString& aName) {
MOZ_ASSERT(NS_IsMainThread());
aName.Assign(mName);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetRawName(nsAString& aName) {
MOZ_ASSERT(NS_IsMainThread());
aName.Assign(mRawName);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetType(nsAString& aType) {
MOZ_ASSERT(NS_IsMainThread());
aType.Assign(mType);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetId(nsAString& aID) {
MOZ_ASSERT(NS_IsMainThread());
aID.Assign(mID);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetRawId(nsAString& aID) {
MOZ_ASSERT(NS_IsMainThread());
aID.Assign(mRawID);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetGroupId(nsAString& aGroupID) {
MOZ_ASSERT(NS_IsMainThread());
aGroupID.Assign(mGroupID);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetRawGroupId(nsAString& aRawGroupID) {
MOZ_ASSERT(NS_IsMainThread());
aRawGroupID.Assign(mRawGroupID);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetScary(bool* aScary) {
*aScary = mScary;
return NS_OK;
}
void MediaDevice::GetSettings(MediaTrackSettings& aOutSettings) const {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mSource);
mSource->GetSettings(aOutSettings);
}
// Threadsafe since mKind and mSource are const.
NS_IMETHODIMP
MediaDevice::GetMediaSource(nsAString& aMediaSource) {
if (mKind == MediaDeviceKind::Audiooutput) {
aMediaSource.Truncate();
} else {
aMediaSource.AssignASCII(
dom::MediaSourceEnumValues::GetString(GetMediaSource()));
}
return NS_OK;
}
nsresult MediaDevice::Allocate(const MediaTrackConstraints& aConstraints,
const MediaEnginePrefs& aPrefs,
uint64_t aWindowID,
const char** aOutBadConstraint) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
// Mock failure for automated tests.
if (mIsFake && aConstraints.mDeviceId.WasPassed() &&
aConstraints.mDeviceId.Value().IsString() &&
aConstraints.mDeviceId.Value().GetAsString().EqualsASCII("bad device")) {
return NS_ERROR_FAILURE;
}
return mSource->Allocate(aConstraints, aPrefs, aWindowID, aOutBadConstraint);
}
void MediaDevice::SetTrack(const RefPtr<MediaTrack>& aTrack,
const PrincipalHandle& aPrincipalHandle) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
mSource->SetTrack(aTrack, aPrincipalHandle);
}
nsresult MediaDevice::Start() {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
return mSource->Start();
}
nsresult MediaDevice::Reconfigure(const MediaTrackConstraints& aConstraints,
const MediaEnginePrefs& aPrefs,
const char** aOutBadConstraint) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
auto type = GetMediaSource();
if (type == MediaSourceEnum::Camera || type == MediaSourceEnum::Microphone) {
NormalizedConstraints c(aConstraints);
if (MediaConstraintsHelper::FitnessDistance(Some(mID), c.mDeviceId) ==
UINT32_MAX) {
*aOutBadConstraint = "deviceId";
return NS_ERROR_INVALID_ARG;
}
if (MediaConstraintsHelper::FitnessDistance(Some(mGroupID), c.mGroupId) ==
UINT32_MAX) {
*aOutBadConstraint = "groupId";
return NS_ERROR_INVALID_ARG;
}
}
return mSource->Reconfigure(aConstraints, aPrefs, aOutBadConstraint);
}
nsresult MediaDevice::FocusOnSelectedSource() {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
return mSource->FocusOnSelectedSource();
}
nsresult MediaDevice::Stop() {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
return mSource->Stop();
}
nsresult MediaDevice::Deallocate() {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
return mSource->Deallocate();
}
MediaSourceEnum MediaDevice::GetMediaSource() const {
// Threadsafe because mSource is const. GetMediaSource() might have other
// requirements.
MOZ_ASSERT(mSource);
return mSource->GetMediaSource();
}
static const MediaTrackConstraints& GetInvariant(
const OwningBooleanOrMediaTrackConstraints& aUnion) {
static const MediaTrackConstraints empty;
return aUnion.IsMediaTrackConstraints() ? aUnion.GetAsMediaTrackConstraints()
: empty;
}
// Source getter returning full list
static void GetMediaDevices(MediaEngine* aEngine, MediaSourceEnum aSrcType,
MediaManager::MediaDeviceSet& aResult,
const char* aMediaDeviceName = nullptr) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
LOG("%s: aEngine=%p, aSrcType=%" PRIu8 ", aMediaDeviceName=%s", __func__,
aEngine, static_cast<uint8_t>(aSrcType),
aMediaDeviceName ? aMediaDeviceName : "null");
nsTArray<RefPtr<MediaDevice>> devices;
aEngine->EnumerateDevices(aSrcType, MediaSinkEnum::Other, &devices);
/*
* 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.
*/
if (aMediaDeviceName && *aMediaDeviceName) {
for (auto& device : devices) {
if (device->mName.EqualsASCII(aMediaDeviceName)) {
aResult.AppendElement(device);
LOG("%s: found aMediaDeviceName=%s", __func__, aMediaDeviceName);
break;
}
}
} else {
aResult = std::move(devices);
if (MOZ_LOG_TEST(gMediaManagerLog, mozilla::LogLevel::Debug)) {
for (auto& device : aResult) {
LOG("%s: appending device=%s", __func__,
NS_ConvertUTF16toUTF8(device->mName).get());
}
}
}
}
RefPtr<MediaManager::BadConstraintsPromise> MediaManager::SelectSettings(
const MediaStreamConstraints& aConstraints, CallerType aCallerType,
const RefPtr<MediaDeviceSetRefCnt>& aDevices) {
MOZ_ASSERT(NS_IsMainThread());
// Algorithm accesses device capabilities code and must run on media thread.
// Modifies passed-in aDevices.
return MediaManager::Dispatch<BadConstraintsPromise>(
__func__, [aConstraints, aDevices,
aCallerType](MozPromiseHolder<BadConstraintsPromise>& holder) {
auto& devices = *aDevices;
// Since the advanced part of the constraints algorithm needs to know
// when a candidate set is overconstrained (zero members), we must split
// up the list into videos and audios, and put it back together again at
// the end.
nsTArray<RefPtr<MediaDevice>> videos;
nsTArray<RefPtr<MediaDevice>> audios;
for (auto& device : devices) {
MOZ_ASSERT(device->mKind == MediaDeviceKind::Videoinput ||
device->mKind == MediaDeviceKind::Audioinput);
if (device->mKind == MediaDeviceKind::Videoinput) {
videos.AppendElement(device);
} else if (device->mKind == MediaDeviceKind::Audioinput) {
audios.AppendElement(device);
}
}
devices.Clear();
const char* badConstraint = nullptr;
bool needVideo = IsOn(aConstraints.mVideo);
bool needAudio = IsOn(aConstraints.mAudio);
if (needVideo && videos.Length()) {
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(GetInvariant(aConstraints.mVideo)), videos,
aCallerType);
}
if (!badConstraint && needAudio && audios.Length()) {
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(GetInvariant(aConstraints.mAudio)), audios,
aCallerType);
}
if (!badConstraint && !needVideo == !videos.Length() &&
!needAudio == !audios.Length()) {
for (auto& video : videos) {
devices.AppendElement(video);
}
for (auto& audio : audios) {
devices.AppendElement(audio);
}
}
holder.Resolve(badConstraint, __func__);
});
}
/**
* Describes a requested task that handles response from the UI and sends
* results back to the DOM.
*/
class GetUserMediaTask {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GetUserMediaTask)
GetUserMediaTask(uint64_t aWindowID, const ipc::PrincipalInfo& aPrincipalInfo,
CallerType aCallerType)
: mPrincipalInfo(aPrincipalInfo),
mWindowID(aWindowID),
mCallerType(aCallerType) {}
virtual void Denied(MediaMgrError::Name aName,
const nsCString& aMessage = ""_ns) = 0;
virtual GetUserMediaStreamTask* AsGetUserMediaStreamTask() { return nullptr; }
virtual SelectAudioOutputTask* AsSelectAudioOutputTask() { return nullptr; }
uint64_t GetWindowID() const { return mWindowID; }
enum CallerType CallerType() const { return mCallerType; }
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t amount = aMallocSizeOf(this);
// Assume mWindowListener is owned by MediaManager.
// Assume mAudioDeviceListener and mVideoDeviceListener are owned by
// mWindowListener.
// Assume PrincipalInfo string buffers are shared.
// Member types without support for accounting of pointees:
// MozPromiseHolder, RefPtr<MediaDevice>.
// We don't have a good way to account for lambda captures for MozPromise
// callbacks.
return amount;
}
protected:
virtual ~GetUserMediaTask() = default;
// Call GetPrincipalKey again, if not private browing, this time with
// persist = true, to promote deviceIds to persistent, in case they're not
// already. Fire'n'forget.
void PersistPrincipalKey() {
if (IsPrincipalInfoPrivate(mPrincipalInfo)) {
return;
}
media::GetPrincipalKey(mPrincipalInfo, true)
->Then(
GetCurrentSerialEventTarget(), __func__,
[](const media::PrincipalKeyPromise::ResolveOrRejectValue& aValue) {
if (aValue.IsReject()) {
LOG("Failed get Principal key. Persisting of deviceIds "
"will be broken");
}
});
}
private:
// Thread-safe (object) principal of Window with ID mWindowID
const ipc::PrincipalInfo mPrincipalInfo;
protected:
// The ID of the not-necessarily-toplevel inner Window relevant global
// object of the MediaDevices on which getUserMedia() was called
const uint64_t mWindowID;
// Whether the JS caller of getUserMedia() has system (subject) principal
const enum CallerType mCallerType;
};
/**
* Describes a requested task that handles response from the UI to a
* getUserMedia() request and sends results back to content. If the request
* is allowed and device initialization succeeds, then the MozPromise is
* resolved with a DOMMediaStream having a track or tracks for the approved
* device or devices.
*/
class GetUserMediaStreamTask final : public GetUserMediaTask {
public:
GetUserMediaStreamTask(
const MediaStreamConstraints& aConstraints,
MozPromiseHolder<MediaManager::StreamPromise>&& aHolder,
uint64_t aWindowID, RefPtr<GetUserMediaWindowListener> aWindowListener,
RefPtr<DeviceListener> aAudioDeviceListener,
RefPtr<DeviceListener> aVideoDeviceListener,
const MediaEnginePrefs& aPrefs, const ipc::PrincipalInfo& aPrincipalInfo,
enum CallerType aCallerType, bool aShouldFocusSource)
: GetUserMediaTask(aWindowID, aPrincipalInfo, aCallerType),
mConstraints(aConstraints),
mHolder(std::move(aHolder)),
mWindowListener(std::move(aWindowListener)),
mAudioDeviceListener(std::move(aAudioDeviceListener)),
mVideoDeviceListener(std::move(aVideoDeviceListener)),
mPrefs(aPrefs),
mShouldFocusSource(aShouldFocusSource),
mManager(MediaManager::GetInstance()) {}
void Allowed(RefPtr<MediaDevice> aAudioDevice,
RefPtr<MediaDevice> aVideoDevice) {
MOZ_ASSERT(aAudioDevice || aVideoDevice);
mAudioDevice = std::move(aAudioDevice);
mVideoDevice = std::move(aVideoDevice);
// Reuse the same thread to save memory.
MediaManager::Dispatch(
NewRunnableMethod("GetUserMediaStreamTask::AllocateDevices", this,
&GetUserMediaStreamTask::AllocateDevices));
}
GetUserMediaStreamTask* AsGetUserMediaStreamTask() override { return this; }
private:
~GetUserMediaStreamTask() override {
if (!mHolder.IsEmpty()) {
Fail(MediaMgrError::Name::NotAllowedError);
}
}
void Fail(MediaMgrError::Name aName, const nsCString& aMessage = ""_ns,
const nsString& aConstraint = u""_ns) {
mHolder.Reject(MakeRefPtr<MediaMgrError>(aName, aMessage, aConstraint),
__func__);
// We add a disabled listener to the StreamListeners array until accepted
// If this was the only active MediaStream, remove the window from the list.
NS_DispatchToMainThread(NS_NewRunnableFunction(
"DeviceListener::Stop",
[audio = mAudioDeviceListener, video = mVideoDeviceListener] {
if (audio) {
audio->Stop();
}
if (video) {
video->Stop();
}
}));
}
/**
* Runs on a separate thread and is responsible for allocating devices.
*
* Do not run this on the main thread.
*/
void AllocateDevices() {
MOZ_ASSERT(!NS_IsMainThread());
LOG("GetUserMediaStreamTask::AllocateDevices()");
// Allocate a video or audio device and return a MediaStream via
// PrepareDOMStream().
nsresult rv;
const char* errorMsg = nullptr;
const char* badConstraint = nullptr;
if (mAudioDevice) {
auto& constraints = GetInvariant(mConstraints.mAudio);
rv = mAudioDevice->Allocate(constraints, mPrefs, mWindowID,
&badConstraint);
if (NS_FAILED(rv)) {
errorMsg = "Failed to allocate audiosource";
if (rv == NS_ERROR_NOT_AVAILABLE && !badConstraint) {
nsTArray<RefPtr<MediaDevice>> devices;
devices.AppendElement(mAudioDevice);
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(constraints), devices, mCallerType);
}
}
}
if (!errorMsg && mVideoDevice) {
auto& constraints = GetInvariant(mConstraints.mVideo);
rv = mVideoDevice->Allocate(constraints, mPrefs, mWindowID,
&badConstraint);
if (NS_FAILED(rv)) {
errorMsg = "Failed to allocate videosource";
if (rv == NS_ERROR_NOT_AVAILABLE && !badConstraint) {
nsTArray<RefPtr<MediaDevice>> devices;
devices.AppendElement(mVideoDevice);
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(constraints), devices, mCallerType);
}
if (mAudioDevice) {
mAudioDevice->Deallocate();
}
} else {
if (mCallerType == CallerType::NonSystem) {
if (mShouldFocusSource) {
rv = mVideoDevice->FocusOnSelectedSource();
if (NS_FAILED(rv)) {
LOG("FocusOnSelectedSource failed");
}
}
}
}
}
if (errorMsg) {
LOG("%s %" PRIu32, errorMsg, static_cast<uint32_t>(rv));
if (badConstraint) {
Fail(MediaMgrError::Name::OverconstrainedError, ""_ns,
NS_ConvertUTF8toUTF16(badConstraint));
} else {
Fail(MediaMgrError::Name::NotReadableError, nsCString(errorMsg));
}
NS_DispatchToMainThread(
NS_NewRunnableFunction("MediaManager::SendPendingGUMRequest", []() {
if (MediaManager* manager = MediaManager::GetIfExists()) {
manager->SendPendingGUMRequest();
}
}));
return;
}
NS_DispatchToMainThread(
NewRunnableMethod("GetUserMediaStreamTask::PrepareDOMStream", this,
&GetUserMediaStreamTask::PrepareDOMStream));
}
public:
void Denied(MediaMgrError::Name aName, const nsCString& aMessage) override {
MOZ_ASSERT(NS_IsMainThread());
Fail(aName, aMessage);
}
const MediaStreamConstraints& GetConstraints() { return mConstraints; }
private:
void PrepareDOMStream();
// Constraints derived from those passed to getUserMedia() but adjusted for
// preferences, defaults, and security
const MediaStreamConstraints mConstraints;
MozPromiseHolder<MediaManager::StreamPromise> mHolder;
// GetUserMediaWindowListener with which DeviceListeners are registered
const RefPtr<GetUserMediaWindowListener> mWindowListener;
const RefPtr<DeviceListener> mAudioDeviceListener;
const RefPtr<DeviceListener> mVideoDeviceListener;
// MediaDevices are set when selected and Allowed() by the UI.
RefPtr<MediaDevice> mAudioDevice;
RefPtr<MediaDevice> mVideoDevice;
// Copy of MediaManager::mPrefs
const MediaEnginePrefs mPrefs;
// media.getusermedia.window.focus_source.enabled
const bool mShouldFocusSource;
// The MediaManager is referenced at construction so that it won't be
// created after its ShutdownBlocker would run.
const RefPtr<MediaManager> mManager;
};
/**
* Creates a MediaTrack, attaches a listener and resolves a MozPromise to
* provide the stream to the DOM.
*
* All of this must be done on the main thread!
*/
void GetUserMediaStreamTask::PrepareDOMStream() {
MOZ_ASSERT(NS_IsMainThread());
LOG("GetUserMediaStreamTask::PrepareDOMStream()");
nsGlobalWindowInner* window =
nsGlobalWindowInner::GetInnerWindowWithId(mWindowID);
// We're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
if (!mManager->IsWindowListenerStillActive(mWindowListener)) {
// This window is no longer live. mListener has already been removed.
return;
}
MediaTrackGraph::GraphDriverType graphDriverType =
mAudioDevice ? MediaTrackGraph::AUDIO_THREAD_DRIVER
: MediaTrackGraph::SYSTEM_THREAD_DRIVER;
MediaTrackGraph* mtg = MediaTrackGraph::GetInstance(
graphDriverType, window, MediaTrackGraph::REQUEST_DEFAULT_SAMPLE_RATE,
MediaTrackGraph::DEFAULT_OUTPUT_DEVICE);
auto domStream = MakeRefPtr<DOMMediaStream>(window);
RefPtr<LocalTrackSource> audioTrackSource;
RefPtr<LocalTrackSource> videoTrackSource;
nsCOMPtr<nsIPrincipal> principal;
RefPtr<PeerIdentity> peerIdentity = nullptr;
if (!mConstraints.mPeerIdentity.IsEmpty()) {
peerIdentity = new PeerIdentity(mConstraints.mPeerIdentity);
principal = NullPrincipal::CreateWithInheritedAttributes(
window->GetExtantDoc()->NodePrincipal());
} else {
principal = window->GetExtantDoc()->NodePrincipal();
}
RefPtr<GenericNonExclusivePromise> firstFramePromise;
if (mAudioDevice) {
if (mAudioDevice->GetMediaSource() == MediaSourceEnum::AudioCapture) {
// AudioCapture is a special case, here, in the sense that we're not
// really using the audio source and the SourceMediaTrack, which acts
// as placeholders. We re-route a number of tracks internally in the
// MTG and mix them down instead.
NS_WARNING(
"MediaCaptureWindowState doesn't handle "
"MediaSourceEnum::AudioCapture. This must be fixed with UX "
"before shipping.");
auto audioCaptureSource = MakeRefPtr<AudioCaptureTrackSource>(
principal, window, u"Window audio capture"_ns,
mtg->CreateAudioCaptureTrack(), peerIdentity);
audioTrackSource = audioCaptureSource;
RefPtr<MediaStreamTrack> track = new dom::AudioStreamTrack(
window, audioCaptureSource->InputTrack(), audioCaptureSource);
domStream->AddTrackInternal(track);
} else {
nsString audioDeviceName;
mAudioDevice->GetName(audioDeviceName);
RefPtr<MediaTrack> track;
#ifdef MOZ_WEBRTC
if (mAudioDevice->mIsFake) {
track = mtg->CreateSourceTrack(MediaSegment::AUDIO);
} else {
track = AudioInputTrack::Create(mtg);
track->Suspend(); // Microphone source resumes in SetTrack
}
#else
track = mtg->CreateSourceTrack(MediaSegment::AUDIO);
#endif
audioTrackSource = new LocalTrackSource(
principal, audioDeviceName, mAudioDeviceListener,
mAudioDevice->GetMediaSource(), track, peerIdentity);
MOZ_ASSERT(MediaManager::IsOn(mConstraints.mAudio));
RefPtr<MediaStreamTrack> domTrack = new dom::AudioStreamTrack(
window, track, audioTrackSource, dom::MediaStreamTrackState::Live,
false, GetInvariant(mConstraints.mAudio));
domStream->AddTrackInternal(domTrack);
}
}
if (mVideoDevice) {
nsString videoDeviceName;
mVideoDevice->GetName(videoDeviceName);
RefPtr<MediaTrack> track = mtg->CreateSourceTrack(MediaSegment::VIDEO);
videoTrackSource = new LocalTrackSource(
principal, videoDeviceName, mVideoDeviceListener,
mVideoDevice->GetMediaSource(), track, peerIdentity);
MOZ_ASSERT(MediaManager::IsOn(mConstraints.mVideo));
RefPtr<MediaStreamTrack> domTrack = new dom::VideoStreamTrack(
window, track, videoTrackSource, dom::MediaStreamTrackState::Live,
false, GetInvariant(mConstraints.mVideo));
domStream->AddTrackInternal(domTrack);
switch (mVideoDevice->GetMediaSource()) {
case MediaSourceEnum::Browser:
case MediaSourceEnum::Screen:
case MediaSourceEnum::Window:
// Wait for first frame for screen-sharing devices, to ensure
// with and height settings are available immediately, to pass wpt.
firstFramePromise = mVideoDevice->mSource->GetFirstFramePromise();
break;
default:
break;
}
}
if (!domStream || (!audioTrackSource && !videoTrackSource) || sHasShutdown) {
LOG("Returning error for getUserMedia() - no stream");
mHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError,
sHasShutdown ? "In shutdown"_ns : "No stream."_ns),
__func__);
return;
}
// Activate our device listeners. We'll call Start() on the source when we
// get a callback that the MediaStream has started consuming. The listener
// is freed when the page is invalidated (on navigation or close).
if (mAudioDeviceListener) {
mWindowListener->Activate(mAudioDeviceListener, mAudioDevice,
std::move(audioTrackSource));
}
if (mVideoDeviceListener) {
mWindowListener->Activate(mVideoDeviceListener, mVideoDevice,
std::move(videoTrackSource));
}
// Dispatch to the media thread to ask it to start the sources, because that
// can take a while.
typedef DeviceListener::DeviceListenerPromise PromiseType;
AutoTArray<RefPtr<PromiseType>, 2> promises;
if (mAudioDeviceListener) {
promises.AppendElement(mAudioDeviceListener->InitializeAsync());
}
if (mVideoDeviceListener) {
promises.AppendElement(mVideoDeviceListener->InitializeAsync());
}
PromiseType::All(GetMainThreadSerialEventTarget(), promises)
->Then(
GetMainThreadSerialEventTarget(), __func__,
[manager = mManager, windowListener = mWindowListener,
firstFramePromise] {
LOG("GetUserMediaStreamTask::PrepareDOMStream: starting success "
"callback following InitializeAsync()");
// Initiating and starting devices succeeded.
windowListener->ChromeAffectingStateChanged();
manager->SendPendingGUMRequest();
if (!firstFramePromise) {
return DeviceListener::DeviceListenerPromise::CreateAndResolve(
true, __func__);
}
RefPtr<DeviceListener::DeviceListenerPromise> resolvePromise =
firstFramePromise->Then(
GetMainThreadSerialEventTarget(), __func__,
[] {
return DeviceListener::DeviceListenerPromise::
CreateAndResolve(true, __func__);
},
[] {
return DeviceListener::DeviceListenerPromise::
CreateAndReject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError,
"In shutdown"),
__func__);
});
return resolvePromise;
},
[audio = mAudioDeviceListener,
video = mVideoDeviceListener](RefPtr<MediaMgrError>&& aError) {
LOG("GetUserMediaStreamTask::PrepareDOMStream: starting failure "
"callback following InitializeAsync()");
if (audio) {
audio->Stop();
}
if (video) {
video->Stop();
}
return DeviceListener::DeviceListenerPromise::CreateAndReject(
aError, __func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[holder = std::move(mHolder), domStream](
const DeviceListener::DeviceListenerPromise::ResolveOrRejectValue&
aValue) mutable {
if (aValue.IsResolve()) {
holder.Resolve(domStream, __func__);
} else {
holder.Reject(aValue.RejectValue(), __func__);
}
});
PersistPrincipalKey();
}
/**
* Describes a requested task that handles response from the UI to a
* selectAudioOutput() request and sends results back to content. If the
* request is allowed, then the MozPromise is resolved with a MediaDevice
* for the approved device.
*/
class SelectAudioOutputTask final : public GetUserMediaTask {
public:
SelectAudioOutputTask(MozPromiseHolder<MediaManager::DevicePromise>&& aHolder,
uint64_t aWindowID, enum CallerType aCallerType,
const ipc::PrincipalInfo& aPrincipalInfo)
: GetUserMediaTask(aWindowID, aPrincipalInfo, aCallerType),
mHolder(std::move(aHolder)) {}
void Allowed(RefPtr<MediaDevice> aAudioOutput) {
MOZ_ASSERT(aAudioOutput);
mHolder.Resolve(std::move(aAudioOutput), __func__);
PersistPrincipalKey();
}
void Denied(MediaMgrError::Name aName, const nsCString& aMessage) override {
MOZ_ASSERT(NS_IsMainThread());
Fail(aName, aMessage);
}
SelectAudioOutputTask* AsSelectAudioOutputTask() override { return this; }
private:
~SelectAudioOutputTask() override {
if (!mHolder.IsEmpty()) {
Fail(MediaMgrError::Name::NotAllowedError);
}
}
void Fail(MediaMgrError::Name aName, const nsCString& aMessage = ""_ns) {
mHolder.Reject(MakeRefPtr<MediaMgrError>(aName, aMessage), __func__);
}
private:
MozPromiseHolder<MediaManager::DevicePromise> mHolder;
};
/* static */
void MediaManager::GuessVideoDeviceGroupIDs(MediaDeviceSet& aDevices,
const MediaDeviceSet& aAudios) {
// Run the logic in a lambda to avoid duplication.
auto updateGroupIdIfNeeded = [&](RefPtr<MediaDevice>& aVideo,
const MediaDeviceKind aKind) -> bool {
MOZ_ASSERT(aVideo->mKind == MediaDeviceKind::Videoinput);
MOZ_ASSERT(aKind == MediaDeviceKind::Audioinput ||
aKind == MediaDeviceKind::Audiooutput);
// This will store the new group id if a match is found.
nsString newVideoGroupID;
// If the group id needs to be updated this will become true. It is
// necessary when the new group id is an empty string. Without this extra
// variable to signal the update, we would resort to test if
// `newVideoGroupId` is empty. However,
// that check does not work when the new group id is an empty string.
bool updateGroupId = false;
for (const RefPtr<MediaDevice>& dev : aAudios) {
if (dev->mKind != aKind) {
continue;
}
if (!FindInReadable(aVideo->mName, dev->mName)) {
continue;
}
if (newVideoGroupID.IsEmpty()) {
// This is only expected on first match. If that's the only match group
// id will be updated to this one at the end of the loop.
updateGroupId = true;
newVideoGroupID = dev->mGroupID;
} else {
// More than one device found, it is impossible to know which group id
// is the correct one.
updateGroupId = false;
newVideoGroupID = u""_ns;
break;
}
}
if (updateGroupId) {
aVideo = new MediaDevice(aVideo, aVideo->mID, newVideoGroupID,
aVideo->mRawID, aVideo->mRawGroupID);
return true;
}
return false;
};
for (RefPtr<MediaDevice>& video : aDevices) {
if (video->mKind != MediaDeviceKind::Videoinput) {
continue;
}
if (updateGroupIdIfNeeded(video, MediaDeviceKind::Audioinput)) {
// GroupId has been updated, continue to the next video device
continue;
}
// GroupId has not been updated, check among the outputs
updateGroupIdIfNeeded(video, MediaDeviceKind::Audiooutput);
}
}
/**
* EnumerateRawDevices - Enumerate a list of audio & video devices that
* satisfy passed-in constraints. List contains raw id's.
*/
RefPtr<MediaManager::MgrPromise> MediaManager::EnumerateRawDevices(
MediaSourceEnum aVideoInputType, MediaSourceEnum aAudioInputType,
MediaSinkEnum aAudioOutputType, DeviceEnumerationType aVideoInputEnumType,
DeviceEnumerationType aAudioInputEnumType, bool aForceNoPermRequest,
const RefPtr<MediaDeviceSetRefCnt>& aOutDevices) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aVideoInputType != MediaSourceEnum::Other ||
aAudioInputType != MediaSourceEnum::Other ||
aAudioOutputType != MediaSinkEnum::Other);
// Since the enums can take one of several values, the following asserts rely
// on short circuting behavior. E.g. aVideoInputEnumType != Fake will be true
// if the requested device is not fake and thus the assert will pass. However,
// if the device is fake, aVideoInputType == MediaSourceEnum::Camera will be
// checked as well, ensuring that fake devices are of the camera type.
MOZ_ASSERT(aVideoInputEnumType != DeviceEnumerationType::Fake ||
aVideoInputType == MediaSourceEnum::Camera,
"If fake cams are requested video type should be camera!");
MOZ_ASSERT(aVideoInputEnumType != DeviceEnumerationType::Loopback ||
aVideoInputType == MediaSourceEnum::Camera,
"If loopback video is requested video type should be camera!");
MOZ_ASSERT(aAudioInputEnumType != DeviceEnumerationType::Fake ||
aAudioInputType == MediaSourceEnum::Microphone,
"If fake mics are requested audio type should be microphone!");
MOZ_ASSERT(aAudioInputEnumType != DeviceEnumerationType::Loopback ||
aAudioInputType == MediaSourceEnum::Microphone,
"If loopback audio is requested audio type should be microphone!");
LOG("%s: aVideoInputType=%" PRIu8 ", aAudioInputType=%" PRIu8
", aVideoInputEnumType=%" PRIu8 ", aAudioInputEnumType=%" PRIu8,
__func__, static_cast<uint8_t>(aVideoInputType),
static_cast<uint8_t>(aAudioInputType),
static_cast<uint8_t>(aVideoInputEnumType),
static_cast<uint8_t>(aAudioInputEnumType));
MozPromiseHolder<MgrPromise> holder;
RefPtr<MgrPromise> promise = holder.Ensure(__func__);
const bool hasVideo = aVideoInputType != MediaSourceEnum::Other;
const bool hasAudio = aAudioInputType != MediaSourceEnum::Other;
const bool hasAudioOutput = aAudioOutputType == MediaSinkEnum::Speaker;
// True of at least one of video input or audio input is a fake device
const bool fakeDeviceRequested =
(aVideoInputEnumType == DeviceEnumerationType::Fake && hasVideo) ||
(aAudioInputEnumType == DeviceEnumerationType::Fake && hasAudio);
// True if at least one of video input or audio input is a real device
// or there is audio output.
const bool realDeviceRequested =
(aVideoInputEnumType != DeviceEnumerationType::Fake && hasVideo) ||
(aAudioInputEnumType != DeviceEnumerationType::Fake && hasAudio) ||
hasAudioOutput;
nsAutoCString videoLoopDev, audioLoopDev;
if (hasVideo && aVideoInputEnumType == DeviceEnumerationType::Loopback) {
Preferences::GetCString("media.video_loopback_dev", videoLoopDev);
}
if (hasAudio && aAudioInputEnumType == DeviceEnumerationType::Loopback) {
Preferences::GetCString("media.audio_loopback_dev", audioLoopDev);
}
RefPtr<Runnable> task = NewTaskFrom(
[holder = std::move(holder), aVideoInputType, aAudioInputType,
aVideoInputEnumType, aAudioInputEnumType, videoLoopDev, audioLoopDev,
hasVideo, hasAudio, hasAudioOutput, fakeDeviceRequested,
realDeviceRequested, aOutDevices]() mutable {
// Only enumerate what's asked for, and only fake cams and mics.
RefPtr<MediaEngine> fakeBackend, realBackend;
if (fakeDeviceRequested) {
fakeBackend = new MediaEngineDefault();
}
if (realDeviceRequested) {
MediaManager* manager = MediaManager::GetIfExists();
MOZ_RELEASE_ASSERT(manager, "Must exist while media thread is alive");
realBackend = manager->GetBackend();
}
RefPtr<MediaEngine> videoBackend;
RefPtr<MediaEngine> audioBackend;
Maybe<MediaDeviceSet> micsOfVideoBackend;
Maybe<MediaDeviceSet> speakers;
if (hasVideo) {
videoBackend = aVideoInputEnumType == DeviceEnumerationType::Fake
? fakeBackend
: realBackend;
MediaDeviceSet videos;
LOG("EnumerateRawDevices Task: Getting video sources with %s backend",
videoBackend == fakeBackend ? "fake" : "real");
GetMediaDevices(videoBackend, aVideoInputType, videos,
videoLoopDev.get());
aOutDevices->AppendElements(videos);
}
if (hasAudio) {
audioBackend = aAudioInputEnumType == DeviceEnumerationType::Fake
? fakeBackend
: realBackend;
MediaDeviceSet audios;
LOG("EnumerateRawDevices Task: Getting audio sources with %s backend",
audioBackend == fakeBackend ? "fake" : "real");
GetMediaDevices(audioBackend, aAudioInputType, audios,
audioLoopDev.get());
if (aAudioInputType == MediaSourceEnum::Microphone &&
audioBackend == videoBackend) {
micsOfVideoBackend = Some(MediaDeviceSet());
micsOfVideoBackend->AppendElements(audios);
}
aOutDevices->AppendElements(audios);
}
if (hasAudioOutput) {
MediaDeviceSet outputs;
MOZ_ASSERT(realBackend);
realBackend->EnumerateDevices(MediaSourceEnum::Other,
MediaSinkEnum::Speaker, &outputs);
speakers = Some(MediaDeviceSet());
speakers->AppendElements(outputs);
aOutDevices->AppendElements(outputs);
}
if (hasVideo && aVideoInputType == MediaSourceEnum::Camera) {
MediaDeviceSet audios;
LOG("EnumerateRawDevices Task: Getting audio sources with %s backend "
"for "
"groupId correlation",
videoBackend == fakeBackend ? "fake" : "real");
// We need to correlate cameras with audio groupIds. We use the
// backend of the camera to always do correlation on devices in the
// same scope. If we don't do this, video-only getUserMedia will not
// apply groupId constraints to the same set of groupIds as gets
// returned by enumerateDevices.
if (micsOfVideoBackend.isSome()) {
// Microphones from the same backend used for the cameras have
// already been enumerated. Avoid doing it again.
audios.AppendElements(*micsOfVideoBackend);
} else {
GetMediaDevices(videoBackend, MediaSourceEnum::Microphone, audios,
audioLoopDev.get());
}
if (videoBackend == realBackend) {
// When using the real backend for video, there could also be
// speakers to correlate with. There are no fake speakers.
if (speakers.isSome()) {
// Speakers have already been enumerated. Avoid doing it again.
audios.AppendElements(*speakers);
} else {
realBackend->EnumerateDevices(MediaSourceEnum::Other,
MediaSinkEnum::Speaker, &audios);
}
}
GuessVideoDeviceGroupIDs(*aOutDevices, audios);
}
holder.Resolve(false, __func__);
});
if (realDeviceRequested && aForceNoPermRequest &&
Preferences::GetBool("media.navigator.permission.device", false)) {
// Need to ask permission to retrieve list of all devices;
// notify frontend observer and wait for callback notification to post task.
const char16_t* const type =
(aVideoInputType != MediaSourceEnum::Camera) ? u"audio"
: (aAudioInputType != MediaSourceEnum::Microphone) ? u"video"
: u"all";
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyObservers(static_cast<nsIRunnable*>(task),
"getUserMedia:ask-device-permission", type);
} else {
// Don't need to ask permission to retrieve list of all devices;
// post the retrieval task immediately.
MediaManager::Dispatch(task.forget());
}
return promise;
}
MediaManager::MediaManager(already_AddRefed<TaskQueue> aMediaThread)
: mMediaThread(aMediaThread), mBackend(nullptr) {
mPrefs.mFreq = 1000; // 1KHz test tone
mPrefs.mWidth = 0; // adaptive default
mPrefs.mHeight = 0; // adaptive default
mPrefs.mFPS = MediaEnginePrefs::DEFAULT_VIDEO_FPS;
mPrefs.mAecOn = false;
mPrefs.mUseAecMobile = false;
mPrefs.mAgcOn = false;
mPrefs.mHPFOn = false;
mPrefs.mNoiseOn = false;
mPrefs.mTransientOn = false;
mPrefs.mResidualEchoOn = false;
mPrefs.mFakeDeviceChangeEventOn = false;
mPrefs.mAgc2Forced = false;
#ifdef MOZ_WEBRTC
mPrefs.mAgc =
webrtc::AudioProcessing::Config::GainController1::Mode::kAdaptiveDigital;
mPrefs.mNoise =
webrtc::AudioProcessing::Config::NoiseSuppression::Level::kModerate;
#else
mPrefs.mAgc = 0;
mPrefs.mNoise = 0;
#endif
mPrefs.mChannels = 0; // max channels default
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, %dHz test tones, aec: %s,"
"agc: %s, hpf: %s, noise: %s, agc level: %d, agc version: %s, noise "
"level: %d, transient: %s, residual echo: %s, channels %d",
__FUNCTION__, mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mFreq,
mPrefs.mAecOn ? "on" : "off", mPrefs.mAgcOn ? "on" : "off",
mPrefs.mHPFOn ? "on" : "off", mPrefs.mNoiseOn ? "on" : "off", mPrefs.mAgc,
mPrefs.mAgc2Forced ? "2" : "1", mPrefs.mNoise,
mPrefs.mTransientOn ? "on" : "off", mPrefs.mResidualEchoOn ? "on" : "off",
mPrefs.mChannels);
}
NS_IMPL_ISUPPORTS(MediaManager, nsIMediaManagerService, nsIMemoryReporter,
nsIObserver)
/* static */
StaticRefPtr<MediaManager> MediaManager::sSingleton;
/* static */
StaticMutex MediaManager::sSingletonMutex;
#ifdef DEBUG
/* static */
bool MediaManager::IsInMediaThread() {
StaticMutexAutoLock lock(sSingletonMutex);
return sSingleton && sSingleton->mMediaThread->IsOnCurrentThread();
}
#endif
// NOTE: never Dispatch(....,NS_DISPATCH_SYNC) to the MediaManager
// thread from the MainThread, as we NS_DISPATCH_SYNC to MainThread
// from MediaManager thread.
// Guaranteed never to return nullptr.
/* static */
MediaManager* MediaManager::Get() {
StaticMutexAutoLock lock(sSingletonMutex);
if (!sSingleton) {
MOZ_ASSERT(NS_IsMainThread());
static int timesCreated = 0;
timesCreated++;
MOZ_RELEASE_ASSERT(timesCreated == 1);
RefPtr<TaskQueue> mediaThread = new TaskQueue(
GetMediaThreadPool(MediaThreadType::SUPERVISOR), "MediaManager");
LOG("New Media thread for gum");
sSingleton = new MediaManager(mediaThread.forget());
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(sSingleton, "last-pb-context-exited", false);
obs->AddObserver(sSingleton, "getUserMedia:got-device-permission", false);
obs->AddObserver(sSingleton, "getUserMedia:privileged:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:deny", false);
obs->AddObserver(sSingleton, "getUserMedia:response:noOSPermission",
false);
obs->AddObserver(sSingleton, "getUserMedia:revoke", false);
obs->AddObserver(sSingleton, "getUserMedia:muteVideo", false);
obs->AddObserver(sSingleton, "getUserMedia:unmuteVideo", false);
obs->AddObserver(sSingleton, "getUserMedia:muteAudio", false);
obs->AddObserver(sSingleton, "getUserMedia:unmuteAudio", false);
obs->AddObserver(sSingleton, "application-background", false);
obs->AddObserver(sSingleton, "application-foreground", 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.audio.fake_frequency", sSingleton,
false);
#ifdef MOZ_WEBRTC
prefs->AddObserver("media.getusermedia.aec_enabled", sSingleton, false);
prefs->AddObserver("media.getusermedia.aec", sSingleton, false);
prefs->AddObserver("media.getusermedia.agc_enabled", sSingleton, false);
prefs->AddObserver("media.getusermedia.agc", sSingleton, false);
prefs->AddObserver("media.getusermedia.hpf_enabled", sSingleton, false);
prefs->AddObserver("media.getusermedia.noise_enabled", sSingleton, false);
prefs->AddObserver("media.getusermedia.noise", sSingleton, false);
prefs->AddObserver("media.ondevicechange.fakeDeviceChangeEvent.enabled",
sSingleton, false);
prefs->AddObserver("media.getusermedia.channels", sSingleton, false);
#endif
}
RegisterStrongMemoryReporter(sSingleton);
// Prepare async shutdown
class Blocker : public media::ShutdownBlocker {
public:
Blocker()
: media::ShutdownBlocker(
u"Media shutdown: blocking on media thread"_ns) {}
NS_IMETHOD BlockShutdown(nsIAsyncShutdownClient*) override {
MOZ_RELEASE_ASSERT(MediaManager::GetIfExists());
MediaManager::GetIfExists()->Shutdown();
return NS_OK;
}
};
sSingleton->mShutdownBlocker = new Blocker();
nsresult rv = media::MustGetShutdownBarrier()->AddBlocker(
sSingleton->mShutdownBlocker, NS_LITERAL_STRING_FROM_CSTRING(__FILE__),
__LINE__, u""_ns);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
return sSingleton;
}
/* static */
MediaManager* MediaManager::GetIfExists() {
StaticMutexAutoLock lock(sSingletonMutex);
return sSingleton;
}
/* static */
already_AddRefed<MediaManager> MediaManager::GetInstance() {
// so we can have non-refcounted getters
RefPtr<MediaManager> service = MediaManager::Get();
return service.forget();
}
media::Parent<media::NonE10s>* MediaManager::GetNonE10sParent() {
if (!mNonE10sParent) {
mNonE10sParent = new media::Parent<media::NonE10s>();
}
return mNonE10sParent;
}
/* static */
void MediaManager::StartupInit() {
#ifdef WIN32
if (!IsWin8OrLater()) {
// Bug 1107702 - Older Windows fail in GetAdaptersInfo (and others) if the
// first(?) call occurs after the process size is over 2GB (kb/2588507).
// Attempt to 'prime' the pump by making a call at startup.
unsigned long out_buf_len = sizeof(IP_ADAPTER_INFO);
PIP_ADAPTER_INFO pAdapterInfo = (IP_ADAPTER_INFO*)moz_xmalloc(out_buf_len);
if (GetAdaptersInfo(pAdapterInfo, &out_buf_len) == ERROR_BUFFER_OVERFLOW) {
free(pAdapterInfo);
pAdapterInfo = (IP_ADAPTER_INFO*)moz_xmalloc(out_buf_len);
GetAdaptersInfo(pAdapterInfo, &out_buf_len);
}
if (pAdapterInfo) {
free(pAdapterInfo);
}
}
#endif
}
/* static */
void MediaManager::Dispatch(already_AddRefed<Runnable> task) {
if (sHasShutdown) {
// Can't safely delete task here since it may have items with specific
// thread-release requirements.
// XXXkhuey well then who is supposed to delete it?! We don't signal
// that we failed ...
MOZ_CRASH();
return;
}
NS_ASSERTION(Get(), "MediaManager singleton?");
NS_ASSERTION(Get()->mMediaThread, "No thread yet");
MOZ_ALWAYS_SUCCEEDS(Get()->mMediaThread->Dispatch(std::move(task)));
}
template <typename MozPromiseType, typename FunctionType>
/* static */
RefPtr<MozPromiseType> MediaManager::Dispatch(const char* aName,
FunctionType&& aFunction) {
MozPromiseHolder<MozPromiseType> holder;
RefPtr<MozPromiseType> promise = holder.Ensure(aName);
MediaManager::Dispatch(NS_NewRunnableFunction(
aName, [h = std::move(holder), func = std::forward<FunctionType>(
aFunction)]() mutable { func(h); }));
return promise;
}
/* static */
nsresult MediaManager::NotifyRecordingStatusChange(
nsPIDOMWindowInner* aWindow) {
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;
}
auto props = MakeRefPtr<nsHashPropertyBag>();
nsCString pageURL;
nsCOMPtr<nsIURI> docURI = aWindow->GetDocumentURI();
NS_ENSURE_TRUE(docURI, NS_ERROR_FAILURE);
nsresult rv = docURI->GetSpec(pageURL);
NS_ENSURE_SUCCESS(rv, rv);
NS_ConvertUTF8toUTF16 requestURL(pageURL);
props->SetPropertyAsAString(u"requestURL"_ns, requestURL);
props->SetPropertyAsInterface(u"window"_ns, aWindow);
obs->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
"recording-device-events", nullptr);
LOG("Sent recording-device-events for url '%s'", pageURL.get());
return NS_OK;
}
void MediaManager::DeviceListChanged() {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown) {
return;
}
mDeviceListChangeEvent.Notify();
// Wait 200 ms, because
// A) on some Windows machines, if we call EnumerateRawDevices immediately
// after receiving devicechange event, we'd get an outdated devices list.
// B) Waiting helps coalesce multiple calls on us into one, which can happen
// if a device with both audio input and output is attached or removed.
// We want to react & fire a devicechange event only once in that case.
if (mDeviceChangeTimer) {
mDeviceChangeTimer->Cancel();
} else {
mDeviceChangeTimer = MakeRefPtr<MediaTimer>();
}
RefPtr<MediaManager> self = this;
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
mDeviceChangeTimer->WaitFor(TimeDuration::FromMilliseconds(200), __func__)
->Then(
GetCurrentSerialEventTarget(), __func__,
[self, this, devices] {
if (!MediaManager::GetIfExists()) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
"In shutdown"),
__func__);
}
return EnumerateRawDevices(
MediaSourceEnum::Camera, MediaSourceEnum::Microphone,
MediaSinkEnum::Speaker, DeviceEnumerationType::Normal,
DeviceEnumerationType::Normal, false, devices);
},
[]() {
// Timer was canceled by us, or we're in shutdown.
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
})
->Then(
GetCurrentSerialEventTarget(), __func__,
[self, this, devices](bool) {
if (!MediaManager::GetIfExists()) {
return;
}
MediaManager::DeviceIdSet deviceIDs;
for (auto& device : *devices) {
nsString id;
device->GetId(id);
MOZ_ALWAYS_TRUE(deviceIDs.put(std::move(id)));
}
// For any real removed cameras, microphones or speakers, notify
// their listeners cleanly that the source has stopped, so JS knows
// and usage indicators update.
for (auto iter = mDeviceIDs.iter(); !iter.done(); iter.next()) {
const auto& id = iter.get();
if (deviceIDs.has(id)) {
// Device has not been removed
continue;
}
// Stop the corresponding DeviceListener. In order to do that
// first collect the listeners in an array and stop them after
// the loop. The StopRawID method modify indirectly the
// mActiveWindows and will assert-crash since the iterator is
// active and the table is being enumerated.
const auto listeners = ToArray(mActiveWindows.Values());
for (const auto& l : listeners) {
l->StopRawID(id);
}
}
mDeviceIDs = std::move(deviceIDs);
},
[](RefPtr<MediaMgrError>&& reason) {});
}
size_t MediaManager::AddTaskAndGetCount(uint64_t aWindowID,
const nsAString& aCallID,
RefPtr<GetUserMediaTask> aTask) {
// Store the task w/callbacks.
mActiveCallbacks.InsertOrUpdate(aCallID, std::move(aTask));
// Add a WindowID cross-reference so OnNavigation can tear things down
nsTArray<nsString>* const array = mCallIds.GetOrInsertNew(aWindowID);
array->AppendElement(aCallID);
return array->Length();
}
RefPtr<GetUserMediaTask> MediaManager::TakeGetUserMediaTask(
const nsAString& aCallID) {
RefPtr<GetUserMediaTask> task;
mActiveCallbacks.Remove(aCallID, getter_AddRefs(task));
if (!task) {
return nullptr;
}
nsTArray<nsString>* array;
mCallIds.Get(task->GetWindowID(), &array);
MOZ_ASSERT(array);
array->RemoveElement(aCallID);
return task;
}
void MediaManager::NotifyAllowed(const nsString& aCallID,
const MediaDeviceSet& aDevices) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
nsCOMPtr<nsIMutableArray> devicesCopy = nsArray::Create();
for (const auto& device : aDevices) {
nsresult rv = devicesCopy->AppendElement(device);
if (NS_WARN_IF(NS_FAILED(rv))) {
obs->NotifyObservers(nullptr, "getUserMedia:response:deny",
aCallID.get());
return;
}
}
obs->NotifyObservers(devicesCopy, "getUserMedia:privileged:allow",
aCallID.get());
}
nsresult MediaManager::GenerateUUID(nsAString& aResult) {
nsresult rv;
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);
aResult.Assign(NS_ConvertUTF8toUTF16(buffer));
return NS_OK;
}
enum class GetUserMediaSecurityState {
Other = 0,
HTTPS = 1,
File = 2,
App = 3,
Localhost = 4,
Loop = 5,
Privileged = 6
};
/**
* This function is used in getUserMedia when privacy.resistFingerprinting is
* true. Only mediaSource of audio/video constraint will be kept.
*/
static void ReduceConstraint(
OwningBooleanOrMediaTrackConstraints& aConstraint) {
// Not requesting stream.
if (!MediaManager::IsOn(aConstraint)) {
return;
}
// It looks like {audio: true}, do nothing.
if (!aConstraint.IsMediaTrackConstraints()) {
return;
}
// Keep mediaSource, ignore all other constraints.
Maybe<nsString> mediaSource;
if (aConstraint.GetAsMediaTrackConstraints().mMediaSource.WasPassed()) {
mediaSource =
Some(aConstraint.GetAsMediaTrackConstraints().mMediaSource.Value());
}
aConstraint.Uninit();
if (mediaSource) {
aConstraint.SetAsMediaTrackConstraints().mMediaSource.Construct(
*mediaSource);
} else {
aConstraint.SetAsMediaTrackConstraints();
}
}
/**
* 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.
*/
RefPtr<MediaManager::StreamPromise> MediaManager::GetUserMedia(
nsPIDOMWindowInner* aWindow,
const MediaStreamConstraints& aConstraintsPassedIn,
CallerType aCallerType) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aWindow);
uint64_t windowID = aWindow->WindowID();
MediaStreamConstraints c(aConstraintsPassedIn); // use a modifiable copy
if (sHasShutdown) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
"In shutdown"),
__func__);
}
// Determine permissions early (while we still have a stack).
nsIURI* docURI = aWindow->GetDocumentURI();
if (!docURI) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError), __func__);
}
bool isChrome = (aCallerType == CallerType::System);
bool privileged =
isChrome ||
Preferences::GetBool("media.navigator.permission.disabled", false);
bool isSecure = aWindow->IsSecureContext();
bool isHandlingUserInput = UserActivation::IsHandlingUserInput();
nsCString host;
nsresult rv = docURI->GetHost(host);
nsCOMPtr<nsIPrincipal> principal =
nsGlobalWindowInner::Cast(aWindow)->GetPrincipal();
if (NS_WARN_IF(!principal)) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::SecurityError),
__func__);
}
Document* doc = aWindow->GetExtantDoc();
if (NS_WARN_IF(!doc)) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::SecurityError),
__func__);
}
// Disallow access to null principal pages and http pages (unless pref)
if (principal->GetIsNullPrincipal() ||
!(isSecure || StaticPrefs::media_getusermedia_insecure_enabled())) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
// This principal needs to be sent to different threads and so via IPC.
// For this reason it's better to convert it to PrincipalInfo right now.
ipc::PrincipalInfo principalInfo;
rv = PrincipalToPrincipalInfo(principal, &principalInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::SecurityError),
__func__);
}
const bool resistFingerprinting =
nsContentUtils::ResistFingerprinting(aCallerType);
if (resistFingerprinting) {
ReduceConstraint(c.mVideo);
ReduceConstraint(c.mAudio);
}
if (!Preferences::GetBool("media.navigator.video.enabled", true)) {
c.mVideo.SetAsBoolean() = false;
}
MediaSourceEnum videoType = MediaSourceEnum::Other; // none
MediaSourceEnum audioType = MediaSourceEnum::Other; // none
if (c.mVideo.IsMediaTrackConstraints()) {
auto& vc = c.mVideo.GetAsMediaTrackConstraints();
if (!vc.mMediaSource.WasPassed()) {
vc.mMediaSource.Construct().AssignASCII(
dom::MediaSourceEnumValues::GetString(MediaSourceEnum::Camera));
}
videoType = StringToEnum(dom::MediaSourceEnumValues::strings,
vc.mMediaSource.Value(), MediaSourceEnum::Other);
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t)videoType);
switch (videoType) {
case MediaSourceEnum::Camera:
break;
case MediaSourceEnum::Browser:
// If no window id is passed in then default to the caller's window.
// Functional defaults are helpful in tests, but also a natural outcome
// of the constraints API's limited semantics for requiring input.
if (!vc.mBrowserWindow.WasPassed()) {
nsPIDOMWindowOuter* outer = aWindow->GetOuterWindow();
vc.mBrowserWindow.Construct(outer->WindowID());
}
[[fallthrough]];
case MediaSourceEnum::Screen:
case MediaSourceEnum::Window:
// Deny screensharing request if support is disabled, or
// the requesting document is not from a host on the whitelist.
if (!Preferences::GetBool(
((videoType == MediaSourceEnum::Browser)
? "media.getusermedia.browser.enabled"
: "media.getusermedia.screensharing.enabled"),
false) ||
(!privileged && !aWindow->IsSecureContext())) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
break;
case MediaSourceEnum::Microphone:
case MediaSourceEnum::Other:
default: {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::OverconstrainedError,
"", u"mediaSource"_ns),
__func__);
}
}
if (!privileged) {
// Only allow privileged content to explicitly pick full-screen,
// application or tabsharing, since these modes are still available for
// testing. All others get "Window" (*) sharing.
//
// *) We overload "Window" with the new default getDisplayMedia spec-
// mandated behavior of not influencing user-choice, which we currently
// implement as a list containing BOTH windows AND screen(s).
//
// Notes on why we chose "Window" as the one to overload. Two reasons:
//
// 1. It's the closest logically & behaviorally (multi-choice, no default)
// 2. Screen is still useful in tests (implicit default is entire screen)
//
// For UX reasons we don't want "Entire Screen" to be the first/default
// choice (in our code first=default). It's a "scary" source that comes
// with complicated warnings on-top that would be confusing as the first
// thing people see, and also deserves to be listed as last resort for
// privacy reasons.
if (videoType == MediaSourceEnum::Screen ||
videoType == MediaSourceEnum::Browser) {
videoType = MediaSourceEnum::Window;
vc.mMediaSource.Value().AssignASCII(
dom::MediaSourceEnumValues::GetString(videoType));
}
// only allow privileged content to set the window id
if (vc.mBrowserWindow.WasPassed()) {
vc.mBrowserWindow.Value() = -1;
}
if (vc.mAdvanced.WasPassed()) {
for (MediaTrackConstraintSet& cs : vc.mAdvanced.Value()) {
if (cs.mBrowserWindow.WasPassed()) {
cs.mBrowserWindow.Value() = -1;
}
}
}
}
} else if (IsOn(c.mVideo)) {
videoType = MediaSourceEnum::Camera;
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t)videoType);
}
if (c.mAudio.IsMediaTrackConstraints()) {
auto& ac = c.mAudio.GetAsMediaTrackConstraints();
if (!ac.mMediaSource.WasPassed()) {
ac.mMediaSource.Construct(NS_ConvertASCIItoUTF16(
dom::MediaSourceEnumValues::GetString(MediaSourceEnum::Microphone)));
}
audioType = StringToEnum(dom::MediaSourceEnumValues::strings,
ac.mMediaSource.Value(), MediaSourceEnum::Other);
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t)audioType);
switch (audioType) {
case MediaSourceEnum::Microphone:
break;
case MediaSourceEnum::AudioCapture:
// Only enable AudioCapture if the pref is enabled. If it's not, we can
// deny right away.
if (!Preferences::GetBool("media.getusermedia.audiocapture.enabled")) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
break;
case MediaSourceEnum::Other:
default: {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::OverconstrainedError,
"", u"mediaSource"_ns),
__func__);
}
}
} else if (IsOn(c.mAudio)) {
audioType = MediaSourceEnum::Microphone;
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t)audioType);
}
// Create a window listener if it doesn't already exist.
RefPtr<GetUserMediaWindowListener> windowListener =
GetOrMakeWindowListener(aWindow);
MOZ_ASSERT(windowListener);
// Create an inactive DeviceListener to act as a placeholder, so the
// window listener doesn't clean itself up until we're done.
auto placeholderListener = MakeRefPtr<DeviceListener>();
windowListener->Register(placeholderListener);
{ // Check Permissions Policy. Reject if a requested feature is disabled.
bool disabled = !IsOn(c.mAudio) && !IsOn(c.mVideo);
if (IsOn(c.mAudio)) {
if (audioType == MediaSourceEnum::Microphone) {
if (Preferences::GetBool("media.getusermedia.microphone.deny", false) ||
!FeaturePolicyUtils::IsFeatureAllowed(doc, u"microphone"_ns)) {
disabled = true;
}
} else if (!FeaturePolicyUtils::IsFeatureAllowed(doc,
u"display-capture"_ns)) {
disabled = true;
}
}
if (IsOn(c.mVideo)) {
if (videoType == MediaSourceEnum::Camera) {
if (Preferences::GetBool("media.getusermedia.camera.deny", false) ||
!FeaturePolicyUtils::IsFeatureAllowed(doc, u"camera"_ns)) {
disabled = true;
}
} else if (!FeaturePolicyUtils::IsFeatureAllowed(doc,
u"display-capture"_ns)) {
disabled = true;
}
}
if (disabled) {
placeholderListener->Stop();
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
}
// Get list of all devices, with origin-specific device ids.
MediaEnginePrefs prefs = mPrefs;
nsString callID;
rv = GenerateUUID(callID);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
bool hasVideo = videoType != MediaSourceEnum::Other;
bool hasAudio = audioType != MediaSourceEnum::Other;
DeviceEnumerationType videoEnumerationType = DeviceEnumerationType::Normal;
DeviceEnumerationType audioEnumerationType = DeviceEnumerationType::Normal;
// Handle loopback and fake requests. For gUM we don't consider resist
// fingerprinting as users should be prompted anyway.
bool wantFakes = c.mFake.WasPassed()
? c.mFake.Value()
: Preferences::GetBool("media.navigator.streams.fake");
nsAutoCString videoLoopDev, audioLoopDev;
// Video
if (videoType == MediaSourceEnum::Camera) {
Preferences::GetCString("media.video_loopback_dev", videoLoopDev);
// Loopback prefs take precedence over fake prefs
if (!videoLoopDev.IsEmpty()) {
videoEnumerationType = DeviceEnumerationType::Loopback;
} else if (wantFakes) {
videoEnumerationType = DeviceEnumerationType::Fake;
}
}
// Audio
if (audioType == MediaSourceEnum::Microphone) {
Preferences::GetCString("media.audio_loopback_dev", audioLoopDev);
// Loopback prefs take precedence over fake prefs
if (!audioLoopDev.IsEmpty()) {
audioEnumerationType = DeviceEnumerationType::Loopback;
} else if (wantFakes) {
audioEnumerationType = DeviceEnumerationType::Fake;
}
}
bool realDevicesRequested =
(videoEnumerationType != DeviceEnumerationType::Fake && hasVideo) ||
(audioEnumerationType != DeviceEnumerationType::Fake && hasAudio);
bool askPermission =
(!privileged ||
Preferences::GetBool("media.navigator.permission.force")) &&
(realDevicesRequested ||
Preferences::GetBool("media.navigator.permission.fake"));
LOG("%s: Preparing to enumerate devices. windowId=%" PRIu64
", videoType=%" PRIu8 ", audioType=%" PRIu8
", videoEnumerationType=%" PRIu8 ", audioEnumerationType=%" PRIu8
", askPermission=%s",
__func__, windowID, static_cast<uint8_t>(videoType),
static_cast<uint8_t>(audioType),
static_cast<uint8_t>(videoEnumerationType),
static_cast<uint8_t>(audioEnumerationType),
askPermission ? "true" : "false");
RefPtr<MediaManager> self = this;
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
return EnumerateDevicesImpl(aWindow, videoType, audioType,
MediaSinkEnum::Other, videoEnumerationType,
audioEnumerationType, true, devices)
->Then(
GetCurrentSerialEventTarget(), __func__,
[self, windowID, c, windowListener, aCallerType, devices](bool) {
LOG("GetUserMedia: post enumeration promise success callback "
"starting");
// Ensure that our windowID is still good.
RefPtr<nsPIDOMWindowInner> window =
nsGlobalWindowInner::GetInnerWindowWithId(windowID);
if (!window || !self->IsWindowListenerStillActive(windowListener)) {
LOG("GetUserMedia: bad window (%" PRIu64
") in post enumeration success callback!",
windowID);
return BadConstraintsPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
// Apply any constraints. This modifies the passed-in list.
return self->SelectSettings(c, aCallerType, devices);
},
[](RefPtr<MediaMgrError>&& aError) {
LOG("GetUserMedia: post enumeration EnumerateDevicesImpl "
"failure callback called!");
return BadConstraintsPromise::CreateAndReject(std::move(aError),
__func__);
})
->Then(
GetCurrentSerialEventTarget(), __func__,
[self, windowID, c, windowListener, placeholderListener, hasAudio,
hasVideo, askPermission, prefs, isSecure, isHandlingUserInput,
callID, principalInfo, aCallerType, devices,
resistFingerprinting](const char* badConstraint) mutable {
LOG("GetUserMedia: starting post enumeration promise2 success "
"callback!");
// Ensure that the window is still good.
RefPtr<nsPIDOMWindowInner> window =
nsGlobalWindowInner::GetInnerWindowWithId(windowID);
if (!window || !self->IsWindowListenerStillActive(windowListener)) {
LOG("GetUserMedia: bad window (%" PRIu64
") in post enumeration success callback 2!",
windowID);
placeholderListener->Stop();
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
if (badConstraint) {
LOG("GetUserMedia: bad constraint found in post enumeration "
"promise2 success callback! Calling error handler!");
nsString constraint;
constraint.AssignASCII(badConstraint);
placeholderListener->Stop();
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::OverconstrainedError, "",
constraint),
__func__);
}
if (!devices->Length()) {
LOG("GetUserMedia: no devices found in post enumeration promise2 "
"success callback! Calling error handler!");
placeholderListener->Stop();
// When privacy.resistFingerprinting = true, no
// available device implies content script is requesting
// a fake device, so report NotAllowedError.
auto error = resistFingerprinting
? MediaMgrError::Name::NotAllowedError
: MediaMgrError::Name::NotFoundError;
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(error), __func__);
}
// Time to start devices. Create the necessary device listeners and
// remove the placeholder.
RefPtr<DeviceListener> audioListener;
RefPtr<DeviceListener> videoListener;
if (hasAudio) {
audioListener = MakeRefPtr<DeviceListener>();
windowListener->Register(audioListener);
}
if (hasVideo) {
videoListener = MakeRefPtr<DeviceListener>();
windowListener->Register(videoListener);
}
placeholderListener->Stop();
bool focusSource = mozilla::Preferences::GetBool(
"media.getusermedia.window.focus_source.enabled", true);
// Incremental hack to compile. To be replaced by deeper
// refactoring. MediaManager allows
// "neither-resolve-nor-reject" semantics, so we cannot
// use MozPromiseHolder here.
MozPromiseHolder<StreamPromise> holder;
RefPtr<StreamPromise> p = holder.Ensure(__func__);
// Pass callbacks and listeners along to GetUserMediaStreamTask.
auto task = MakeRefPtr<GetUserMediaStreamTask>(
c, std::move(holder), windowID, std::move(windowListener),
std::move(audioListener), std::move(videoListener), prefs,
principalInfo, aCallerType, focusSource);
size_t taskCount =
self->AddTaskAndGetCount(windowID, callID, std::move(task));
if (!askPermission) {
self->NotifyAllowed(callID, *devices);
} else {
auto req = MakeRefPtr<GetUserMediaRequest>(
window, callID, std::move(devices), c, isSecure,
isHandlingUserInput);
if (!Preferences::GetBool("media.navigator.permission.force") &&
taskCount > 1) {
// there is at least 1 pending gUM request
// For the scarySources test case, always send the
// request
self->mPendingGUMRequest.AppendElement(req.forget());
} else {
nsCOMPtr<nsIObserverService> obs =
services::GetObserverService();
obs->NotifyObservers(req, "getUserMedia:request", nullptr);
}
}
#ifdef MOZ_WEBRTC
EnableWebRtcLog();
#endif
return p;
},
[placeholderListener](RefPtr<MediaMgrError>&& aError) {
LOG("GetUserMedia: post enumeration SelectSettings failure "
"callback called!");
placeholderListener->Stop();
return StreamPromise::CreateAndReject(std::move(aError), __func__);
});
};
/* static */
void MediaManager::AnonymizeDevices(MediaDeviceSet& aDevices,
const nsACString& aOriginKey,
const uint64_t aWindowId) {
if (!aOriginKey.IsEmpty()) {
for (RefPtr<MediaDevice>& device : aDevices) {
nsString id;
device->GetId(id);
nsString rawId(id);
AnonymizeId(id, aOriginKey);
nsString groupId;
device->GetGroupId(groupId);
nsString rawGroupId = groupId;
// Use window id to salt group id in order to make it session based as
// required by the spec. This does not provide unique group ids through
// out a browser restart. However, this is not agaist the spec.
// Furtermore, since device ids are the same after a browser restart the
// fingerprint is not bigger.
groupId.AppendInt(aWindowId);
AnonymizeId(groupId, aOriginKey);
nsString name;
device->GetName(name);
if (name.Find(u"AirPods"_ns) != -1) {
name = u"AirPods"_ns;
}
device = new MediaDevice(device, id, groupId, rawId, rawGroupId, name);
}
}
}
/* static */
nsresult MediaManager::AnonymizeId(nsAString& aId,
const nsACString& aOriginKey) {
MOZ_ASSERT(NS_IsMainThread());
nsresult rv;
nsCOMPtr<nsIKeyObjectFactory> factory =
do_GetService("@mozilla.org/security/keyobjectfactory;1", &rv);
if (NS_FAILED(rv)) {
return rv;
}
nsCString rawKey;
rv = Base64Decode(aOriginKey, rawKey);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIKeyObject> key;
rv = factory->KeyFromString(nsIKeyObject::HMAC, rawKey, getter_AddRefs(key));
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsICryptoHMAC> hasher =
do_CreateInstance(NS_CRYPTO_HMAC_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
return rv;
}
rv = hasher->Init(nsICryptoHMAC::SHA256, key);
if (NS_FAILED(rv)) {
return rv;
}
NS_ConvertUTF16toUTF8 id(aId);
rv = hasher->Update(reinterpret_cast<const uint8_t*>(id.get()), id.Length());
if (NS_FAILED(rv)) {
return rv;
}
nsCString mac;
rv = hasher->Finish(true, mac);
if (NS_FAILED(rv)) {
return rv;
}
CopyUTF8toUTF16(mac, aId);
return NS_OK;
}
RefPtr<MediaManager::MgrPromise> MediaManager::EnumerateDevicesImpl(
nsPIDOMWindowInner* aWindow, MediaSourceEnum aVideoInputType,
MediaSourceEnum aAudioInputType, MediaSinkEnum aAudioOutputType,
DeviceEnumerationType aVideoInputEnumType,
DeviceEnumerationType aAudioInputEnumType, bool aForceNoPermRequest,
const RefPtr<MediaDeviceSetRefCnt>& aOutDevices) {
MOZ_ASSERT(NS_IsMainThread());
uint64_t windowId = aWindow->WindowID();
LOG("%s: windowId=%" PRIu64 ", aVideoInputType=%" PRIu8
", aAudioInputType=%" PRIu8 ", aVideoInputEnumType=%" PRIu8
", aAudioInputEnumType=%" PRIu8,
__func__, windowId, static_cast<uint8_t>(aVideoInputType),
static_cast<uint8_t>(aAudioInputType),
static_cast<uint8_t>(aVideoInputEnumType),
static_cast<uint8_t>(aAudioInputEnumType));
// To get a device list anonymized for a particular origin, we must:
// 1. Get an origin-key (for either regular or private browsing)
// 2. Get the raw devices list
// 3. Anonymize the raw list with the origin-key.
nsCOMPtr<nsIPrincipal> principal =
nsGlobalWindowInner::Cast(aWindow)->GetPrincipal();
MOZ_ASSERT(principal);
ipc::PrincipalInfo principalInfo;
nsresult rv = PrincipalToPrincipalInfo(principal, &principalInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
// Add the window id here to check for that and abort silently if no longer
// exists.
RefPtr<GetUserMediaWindowListener> windowListener =
GetOrMakeWindowListener(aWindow);
MOZ_ASSERT(windowListener);
// Create an inactive DeviceListener to act as a placeholder, so the
// window listener doesn't clean itself up until we're done.
auto placeholderListener = MakeRefPtr<DeviceListener>();
windowListener->Register(placeholderListener);
bool persist = IsActivelyCapturingOrHasAPermission(windowId);
// GetPrincipalKey is an async API that returns a promise. We use .Then() to
// pass in a lambda to run back on this same thread later once
// GetPrincipalKey resolves. Needed variables are "captured"
// (passed by value) safely into the lambda.
auto originKey = MakeRefPtr<Refcountable<nsCString>>();
return media::GetPrincipalKey(principalInfo, persist)
->Then(
GetMainThreadSerialEventTarget(), __func__,
[windowId, aVideoInputType, aAudioInputType, aAudioOutputType,
aVideoInputEnumType, aAudioInputEnumType, aForceNoPermRequest,
aOutDevices, originKey](const nsCString& aOriginKey) {
MOZ_ASSERT(NS_IsMainThread());
originKey->Assign(aOriginKey);
MediaManager* mgr = MediaManager::GetIfExists();
MOZ_ASSERT(mgr);
if (!mgr->IsWindowStillActive(windowId)) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
return mgr->EnumerateRawDevices(
aVideoInputType, aAudioInputType, aAudioOutputType,
aVideoInputEnumType, aAudioInputEnumType, aForceNoPermRequest,
aOutDevices);
},
[](nsresult rs) {
NS_WARNING(
"EnumerateDevicesImpl failed to get Principal Key. Enumeration "
"will not continue.");
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[windowId, placeholderListener, originKey, aVideoInputEnumType,
aAudioInputEnumType, aOutDevices](bool) {
// Only run if window is still on our active list.
MediaManager* mgr = MediaManager::GetIfExists();
if (!mgr || placeholderListener->Stopped()) {
// The listener has already been removed if the window is no
// longer active.
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
MOZ_ASSERT(mgr->IsWindowStillActive(windowId));
placeholderListener->Stop();
for (auto& device : *aOutDevices) {
if (device->mKind == MediaDeviceKind::Audiooutput ||
(device->mKind == MediaDeviceKind::Audioinput &&
aAudioInputEnumType != DeviceEnumerationType::Fake &&
device->GetMediaSource() == MediaSourceEnum::Microphone) ||
(device->mKind == MediaDeviceKind::Videoinput &&
aVideoInputEnumType != DeviceEnumerationType::Fake &&
device->GetMediaSource() == MediaSourceEnum::Camera)) {
nsString id;
device->GetId(id);
MOZ_ALWAYS_TRUE(mgr->mDeviceIDs.put(std::move(id)));
}
}
MediaManager::AnonymizeDevices(*aOutDevices, *originKey, windowId);
return MgrPromise::CreateAndResolve(false, __func__);
},
[placeholderListener](RefPtr<MediaMgrError>&& aError) {
// EnumerateDevicesImpl may fail if a new doc has been set, in which
// case the OnNavigation() method should have removed all previous
// active listeners.
MOZ_ASSERT(placeholderListener->Stopped());
return MgrPromise::CreateAndReject(std::move(aError), __func__);
});
}
RefPtr<MediaManager::DeviceSetPromise> MediaManager::EnumerateDevices(
nsPIDOMWindowInner* aWindow) {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown) {
return DeviceSetPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
"In shutdown"),
__func__);
}
Document* doc = aWindow->GetExtantDoc();
MOZ_ASSERT(doc);
DeviceEnumerationType videoEnumerationType = DeviceEnumerationType::Normal;
DeviceEnumerationType audioEnumerationType = DeviceEnumerationType::Normal;
// Only expose devices which are allowed to use:
// https://w3c.github.io/mediacapture-main/#dom-mediadevices-enumeratedevices
MediaSourceEnum videoType =
FeaturePolicyUtils::IsFeatureAllowed(doc, u"camera"_ns)
? MediaSourceEnum::Camera
: MediaSourceEnum::Other;
MediaSourceEnum audioType =
FeaturePolicyUtils::IsFeatureAllowed(doc, u"microphone"_ns)
? MediaSourceEnum::Microphone
: MediaSourceEnum::Other;
MediaSinkEnum audioOutputType =
Preferences::GetBool("media.setsinkid.enabled") &&
FeaturePolicyUtils::IsFeatureAllowed(doc, u"speaker-selection"_ns)
? MediaSinkEnum::Speaker
: MediaSinkEnum::Other;
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
if (audioType == MediaSourceEnum::Other &&
videoType == MediaSourceEnum::Other &&
audioOutputType == MediaSinkEnum::Other) {
return DeviceSetPromise::CreateAndResolve(devices, __func__);
}
bool resistFingerprinting = nsContentUtils::ShouldResistFingerprinting(doc);
// In order of precedence: resist fingerprinting > loopback > fake pref
if (resistFingerprinting) {
videoEnumerationType = DeviceEnumerationType::Fake;
audioEnumerationType = DeviceEnumerationType::Fake;
} else {
// Handle loopback and fake requests
nsAutoCString videoLoopDev, audioLoopDev;
bool wantFakes = Preferences::GetBool("media.navigator.streams.fake");
// Video
if (videoType == MediaSourceEnum::Camera) {
Preferences::GetCString("media.video_loopback_dev", videoLoopDev);
// Loopback prefs take precedence over fake prefs
if (!videoLoopDev.IsEmpty()) {
videoEnumerationType = DeviceEnumerationType::Loopback;
} else if (wantFakes) {
videoEnumerationType = DeviceEnumerationType::Fake;
}
}
// Audio
if (audioType == MediaSourceEnum::Microphone) {
Preferences::GetCString("media.audio_loopback_dev", audioLoopDev);
// Loopback prefs take precedence over fake prefs
if (!audioLoopDev.IsEmpty()) {
audioEnumerationType = DeviceEnumerationType::Loopback;
} else if (wantFakes) {
audioEnumerationType = DeviceEnumerationType::Fake;
}
}
}
return EnumerateDevicesImpl(aWindow, videoType, audioType, audioOutputType,
videoEnumerationType, audioEnumerationType, false,
devices)
->Then(
GetCurrentSerialEventTarget(), __func__,
[devices](bool) {
return DeviceSetPromise::CreateAndResolve(devices, __func__);
},
[](RefPtr<MediaMgrError>&& aError) {
return DeviceSetPromise::CreateAndReject(std::move(aError),
__func__);
});
}
RefPtr<MediaManager::DevicePromise> MediaManager::SelectAudioOutput(
nsPIDOMWindowInner* aWindow, const dom::AudioOutputOptions& aOptions,
CallerType aCallerType) {
bool isHandlingUserInput = UserActivation::IsHandlingUserInput();
nsCOMPtr<nsIPrincipal> principal =
nsGlobalWindowInner::Cast(aWindow)->GetPrincipal();
if (!FeaturePolicyUtils::IsFeatureAllowed(aWindow->GetExtantDoc(),
u"speaker-selection"_ns)) {
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::NotAllowedError,
"Document's Permissions Policy does not allow selectAudioOutput()"),
__func__);
}
if (NS_WARN_IF(!principal)) {
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::SecurityError),
__func__);
}
// Disallow access to null principal.
if (principal->GetIsNullPrincipal()) {
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
__func__);
}
ipc::PrincipalInfo principalInfo;
nsresult rv = PrincipalToPrincipalInfo(principal, &principalInfo);
if (NS_WARN_IF(NS_FAILED(rv))) {
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::SecurityError),
__func__);
}
uint64_t windowID = aWindow->WindowID();
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
return EnumerateDevicesImpl(aWindow, MediaSourceEnum::Other,
MediaSourceEnum::Other, MediaSinkEnum::Speaker,
DeviceEnumerationType::Normal,
DeviceEnumerationType::Normal, true, devices)
->Then(
GetCurrentSerialEventTarget(), __func__,
[self = RefPtr<MediaManager>(this), windowID, devices, aOptions,
aCallerType, isHandlingUserInput, principalInfo](bool) mutable {
// Ensure that the window is still good.
RefPtr<nsPIDOMWindowInner> window =
nsGlobalWindowInner::GetInnerWindowWithId(windowID);
if (!window) {
LOG("SelectAudioOutput: bad window (%" PRIu64
") in post enumeration success callback!",
windowID);
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
if (devices->IsEmpty()) {
LOG("SelectAudioOutput: no devices found");
auto error = nsContentUtils::ResistFingerprinting(aCallerType)
? MediaMgrError::Name::NotAllowedError
: MediaMgrError::Name::NotFoundError;
return DevicePromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(error), __func__);
}
MozPromiseHolder<DevicePromise> holder;
RefPtr<DevicePromise> p = holder.Ensure(__func__);
auto task = MakeRefPtr<SelectAudioOutputTask>(
std::move(holder), windowID, aCallerType, principalInfo);
nsString callID;
nsresult rv = GenerateUUID(callID);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
size_t taskCount =
self->AddTaskAndGetCount(windowID, callID, std::move(task));
bool askPermission =
!Preferences::GetBool("media.navigator.permission.disabled") ||
Preferences::GetBool("media.navigator.permission.force");
if (!askPermission) {
self->NotifyAllowed(callID, *devices);
} else {
MOZ_ASSERT(window->IsSecureContext());
auto req = MakeRefPtr<GetUserMediaRequest>(
window, callID, std::move(devices), aOptions, true,
isHandlingUserInput);
if (taskCount > 1) {
// there is at least 1 pending gUM request
self->mPendingGUMRequest.AppendElement(req.forget());
} else {
nsCOMPtr<nsIObserverService> obs =
services::GetObserverService();
obs->NotifyObservers(req, "getUserMedia:request", nullptr);
}
}
return p;
},
[](RefPtr<MediaMgrError> aError) {
LOG("SelectAudioOutput: EnumerateDevicesImpl "
"failure callback called!");
return DevicePromise::CreateAndReject(std::move(aError), __func__);
});
}
MediaEngine* MediaManager::GetBackend() {
MOZ_ASSERT(MediaManager::IsInMediaThread());
// Plugin backends as appropriate. The default engine also currently
// includes picture support for Android.
// This IS called off main-thread.
if (!mBackend) {
MOZ_RELEASE_ASSERT(
!sHasShutdown); // we should never create a new backend in shutdown
#if defined(MOZ_WEBRTC)
mBackend = new MediaEngineWebRTC();
#else
mBackend = new MediaEngineDefault();
#endif
mDeviceListChangeListener = mBackend->DeviceListChangeEvent().Connect(
AbstractThread::MainThread(), this, &MediaManager::DeviceListChanged);
}
return mBackend;
}
void MediaManager::OnNavigation(uint64_t aWindowID) {
MOZ_ASSERT(NS_IsMainThread());
LOG("OnNavigation for %" PRIu64, aWindowID);
// Stop the streams for this window. The runnables check this value before
// making a call to content.
nsTArray<nsString>* callIDs;
if (mCallIds.Get(aWindowID, &callIDs)) {
for (auto& callID : *callIDs) {
mActiveCallbacks.Remove(callID);
for (auto& request : mPendingGUMRequest.Clone()) {
nsString id;
request->GetCallID(id);
if (id == callID) {
mPendingGUMRequest.RemoveElement(request);
}
}
}
mCallIds.Remove(aWindowID);
}
if (RefPtr<GetUserMediaWindowListener> listener =
GetWindowListener(aWindowID)) {
listener->RemoveAll();
}
MOZ_ASSERT(!GetWindowListener(aWindowID));
}
void MediaManager::OnCameraMute(bool aMute) {
MOZ_ASSERT(NS_IsMainThread());
LOG("OnCameraMute for all windows");
mCamerasMuted = aMute;
// This is safe since we're on main-thread, and the windowlist can only
// be added to from the main-thread
for (const auto& window : mActiveWindows.Values()) {
window->MuteOrUnmuteCameras(aMute);
}
}
void MediaManager::OnMicrophoneMute(bool aMute) {
MOZ_ASSERT(NS_IsMainThread());
LOG("OnMicrophoneMute for all windows");
mMicrophonesMuted = aMute;
// This is safe since we're on main-thread, and the windowlist can only
// be added to from the main-thread
for (const auto& window : mActiveWindows.Values()) {
window->MuteOrUnmuteMicrophones(aMute);
}
}
RefPtr<GetUserMediaWindowListener> MediaManager::GetOrMakeWindowListener(
nsPIDOMWindowInner* aWindow) {
Document* doc = aWindow->GetExtantDoc();
if (!doc) {
// The window has been destroyed. Destroyed windows don't have listeners.
return nullptr;
}
nsIPrincipal* principal = doc->NodePrincipal();
uint64_t windowId = aWindow->WindowID();
RefPtr<GetUserMediaWindowListener> windowListener =
GetWindowListener(windowId);
if (windowListener) {
MOZ_ASSERT(PrincipalHandleMatches(windowListener->GetPrincipalHandle(),
principal));
} else {
windowListener = new GetUserMediaWindowListener(
windowId, MakePrincipalHandle(principal));
AddWindowID(windowId, windowListener);
}
return windowListener;
}
void MediaManager::AddWindowID(uint64_t aWindowId,
RefPtr<GetUserMediaWindowListener> aListener) {
MOZ_ASSERT(NS_IsMainThread());
// Store the WindowID in a hash table and mark as active. The entry is removed
// when this window is closed or navigated away from.
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
if (IsWindowStillActive(aWindowId)) {
MOZ_ASSERT(false, "Window already added");
return;
}
aListener->MuteOrUnmuteCameras(mCamerasMuted);
aListener->MuteOrUnmuteMicrophones(mMicrophonesMuted);
GetActiveWindows()->InsertOrUpdate(aWindowId, std::move(aListener));
RefPtr<WindowGlobalChild> wgc =
WindowGlobalChild::GetByInnerWindowId(aWindowId);
if (wgc) {
wgc->BlockBFCacheFor(BFCacheStatus::ACTIVE_GET_USER_MEDIA);
}
}
void MediaManager::RemoveWindowID(uint64_t aWindowId) {
RefPtr<WindowGlobalChild> wgc =
WindowGlobalChild::GetByInnerWindowId(aWindowId);
if (wgc) {
wgc->UnblockBFCacheFor(BFCacheStatus::ACTIVE_GET_USER_MEDIA);
}
mActiveWindows.Remove(aWindowId);
// get outer windowID
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowId);
if (!window) {
LOG("No inner window for %" PRIu64, aWindowId);
return;
}
auto* outer = window->GetOuterWindow();
if (!outer) {
LOG("No outer window for inner %" PRIu64, aWindowId);
return;
}
uint64_t outerID = outer->WindowID();
// Notify the UI that this window no longer has gUM active
char windowBuffer[32];
SprintfLiteral(windowBuffer, "%" PRIu64, outerID);
nsString data = NS_ConvertUTF8toUTF16(windowBuffer);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyWhenScriptSafe(nullptr, "recording-window-ended", data.get());
LOG("Sent recording-window-ended for window %" PRIu64 " (outer %" PRIu64 ")",
aWindowId, outerID);
}
bool MediaManager::IsWindowListenerStillActive(
const RefPtr<GetUserMediaWindowListener>& aListener) {
MOZ_DIAGNOSTIC_ASSERT(aListener);
return aListener && aListener == GetWindowListener(aListener->WindowID());
}
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.audio.fake_frequency", aData,
&mPrefs.mFreq);
#ifdef MOZ_WEBRTC
GetPrefBool(aBranch, "media.getusermedia.aec_enabled", aData, &mPrefs.mAecOn);
GetPrefBool(aBranch, "media.getusermedia.agc_enabled", aData, &mPrefs.mAgcOn);
GetPrefBool(aBranch, "media.getusermedia.hpf_enabled", aData, &mPrefs.mHPFOn);
GetPrefBool(aBranch, "media.getusermedia.noise_enabled", aData,
&mPrefs.mNoiseOn);
GetPrefBool(aBranch, "media.getusermedia.transient_enabled", aData,
&mPrefs.mTransientOn);
GetPrefBool(aBranch, "media.getusermedia.residual_echo_enabled", aData,
&mPrefs.mResidualEchoOn);
GetPrefBool(aBranch, "media.getusermedia.agc2_forced", aData,
&mPrefs.mAgc2Forced);
GetPref(aBranch, "media.getusermedia.agc", aData, &mPrefs.mAgc);
GetPref(aBranch, "media.getusermedia.noise", aData, &mPrefs.mNoise);
GetPref(aBranch, "media.getusermedia.channels", aData, &mPrefs.mChannels);
bool oldFakeDeviceChangeEventOn = mPrefs.mFakeDeviceChangeEventOn;
GetPrefBool(aBranch, "media.ondevicechange.fakeDeviceChangeEvent.enabled",
aData, &mPrefs.mFakeDeviceChangeEventOn);
if (mPrefs.mFakeDeviceChangeEventOn != oldFakeDeviceChangeEventOn) {
// Dispatch directly to the media thread since we're guaranteed to not be in
// shutdown here. This is called either on construction, or when a pref has
// changed. The pref observers are disconnected during shutdown.
MOZ_DIAGNOSTIC_ASSERT(!sHasShutdown);
MOZ_ALWAYS_SUCCEEDS(mMediaThread->Dispatch(NS_NewRunnableFunction(
"MediaManager::SetFakeDeviceChangeEventsEnabled",
[enable = mPrefs.mFakeDeviceChangeEventOn] {
if (MediaManager* mm = MediaManager::GetIfExists()) {
mm->GetBackend()->SetFakeDeviceChangeEventsEnabled(enable);
}
})));
}
#endif
}
void MediaManager::Shutdown() {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown) {
return;
}
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->RemoveObserver(this, "last-pb-context-exited");
obs->RemoveObserver(this, "getUserMedia:privileged:allow");
obs->RemoveObserver(this, "getUserMedia:response:allow");
obs->RemoveObserver(this, "getUserMedia:response:deny");
obs->RemoveObserver(this, "getUserMedia:response:noOSPermission");
obs->RemoveObserver(this, "getUserMedia:revoke");
obs->RemoveObserver(this, "getUserMedia:muteVideo");
obs->RemoveObserver(this, "getUserMedia:unmuteVideo");
obs->RemoveObserver(this, "getUserMedia:muteAudio");
obs->RemoveObserver(this, "getUserMedia:unmuteAudio");
obs->RemoveObserver(this, "application-background");
obs->RemoveObserver(this, "application-foreground");
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.audio.fake_frequency", this);
#ifdef MOZ_WEBRTC
prefs->RemoveObserver("media.getusermedia.aec_enabled", this);
prefs->RemoveObserver("media.getusermedia.aec", this);
prefs->RemoveObserver("media.getusermedia.agc_enabled", this);
prefs->RemoveObserver("media.getusermedia.hpf_enabled", this);
prefs->RemoveObserver("media.getusermedia.agc", this);
prefs->RemoveObserver("media.getusermedia.noise_enabled", this);
prefs->RemoveObserver("media.getusermedia.noise", this);
prefs->RemoveObserver("media.ondevicechange.fakeDeviceChangeEvent.enabled",
this);
prefs->RemoveObserver("media.getusermedia.channels", this);
#endif
}
if (mDeviceChangeTimer) {
mDeviceChangeTimer->Cancel();
// Drop ref to MediaTimer early to avoid blocking SharedThreadPool shutdown
mDeviceChangeTimer = nullptr;
}
{
// Close off any remaining active windows.
// Live capture at this point is rare but can happen. Stopping it will make
// the window listeners attempt to remove themselves from the active windows
// table. We cannot touch the table at point so we grab a copy of the window
// listeners first.
const auto listeners = ToArray(GetActiveWindows()->Values());
for (const auto& listener : listeners) {
listener->RemoveAll();
}
}
MOZ_ASSERT(GetActiveWindows()->Count() == 0);
GetActiveWindows()->Clear();
mActiveCallbacks.Clear();
mCallIds.Clear();
mPendingGUMRequest.Clear();
mDeviceIDs.clear();
#ifdef MOZ_WEBRTC
StopWebRtcLog();
#endif
// From main thread's point of view, shutdown is now done.
// All that remains is shutting down the media thread.
sHasShutdown = true;
// Because mMediaThread is not an nsThread, we must dispatch to it so it can
// clean up BackgroundChild. Continue stopping thread once this is done.
class ShutdownTask : public Runnable {
public:
ShutdownTask(RefPtr<MediaManager> aManager, RefPtr<Runnable> aReply)
: mozilla::Runnable("ShutdownTask"),
mManager(std::move(aManager)),
mReply(std::move(aReply)) {}
private:
NS_IMETHOD
Run() override {
LOG("MediaManager Thread Shutdown");
MOZ_ASSERT(MediaManager::IsInMediaThread());
// Must shutdown backend on MediaManager thread, since that's where we
// started it from!
{
if (mManager->mBackend) {
mManager->mBackend->SetFakeDeviceChangeEventsEnabled(false);
mManager->mBackend->Shutdown(); // idempotent
mManager->mDeviceListChangeListener.DisconnectIfExists();
}
}
// must explicitly do this before dispatching the reply, since the reply
// may kill us with Stop()
mManager->mBackend =
nullptr; // last reference, will invoke Shutdown() again
if (NS_FAILED(NS_DispatchToMainThread(mReply.forget()))) {
LOG("Will leak thread: DispatchToMainthread of reply runnable failed "
"in MediaManager shutdown");
}
return NS_OK;
}
RefPtr<MediaManager> mManager;
RefPtr<Runnable> mReply;
};
// Post ShutdownTask to execute on mMediaThread and pass in a lambda
// callback to be executed back on this thread once it is done.
//
// The lambda callback "captures" the 'this' pointer for member access.
// This is safe since this is guaranteed to be here since sSingleton isn't
// cleared until the lambda function clears it.
// note that this == sSingleton
#ifdef DEBUG
{
StaticMutexAutoLock lock(sSingletonMutex);
MOZ_ASSERT(this == sSingleton);
}
#endif
// Release the backend (and call Shutdown()) from within the MediaManager
// thread Don't use MediaManager::Dispatch() because we're sHasShutdown=true
// here!
auto shutdown = MakeRefPtr<ShutdownTask>(
this, media::NewRunnableFrom([]() {
LOG("MediaManager shutdown lambda running, releasing MediaManager "
"singleton and thread");
StaticMutexAutoLock lock(sSingletonMutex);
// Remove async shutdown blocker
media::MustGetShutdownBarrier()->RemoveBlocker(
sSingleton->mShutdownBlocker);
sSingleton = nullptr;
return NS_OK;
}));
MOZ_ALWAYS_SUCCEEDS(mMediaThread->Dispatch(shutdown.forget()));
mMediaThread->BeginShutdown();
mMediaThread->AwaitShutdownAndIdle();
}
void MediaManager::SendPendingGUMRequest() {
if (mPendingGUMRequest.Length() > 0) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyObservers(mPendingGUMRequest[0], "getUserMedia:request",
nullptr);
mPendingGUMRequest.RemoveElementAt(0);
}
}
bool IsGUMResponseNoAccess(const char* aTopic,
MediaMgrError::Name& aErrorName) {
if (!strcmp(aTopic, "getUserMedia:response:deny")) {
aErrorName = MediaMgrError::Name::NotAllowedError;
return true;
}
if (!strcmp(aTopic, "getUserMedia:response:noOSPermission")) {
aErrorName = MediaMgrError::Name::NotFoundError;
return true;
}
return false;
}
static MediaSourceEnum ParseScreenColonWindowID(const char16_t* aData,
uint64_t* aWindowIDOut) {
MOZ_ASSERT(aWindowIDOut);
// may be windowid or screen:windowid
const nsDependentString data(aData);
if (Substring(data, 0, strlen("screen:")).EqualsLiteral("screen:")) {
nsresult rv;
*aWindowIDOut = Substring(data, strlen("screen:")).ToInteger64(&rv);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return MediaSourceEnum::Screen;
}
nsresult rv;
*aWindowIDOut = data.ToInteger64(&rv);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return MediaSourceEnum::Camera;
}
nsresult MediaManager::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
MOZ_ASSERT(NS_IsMainThread());
MediaMgrError::Name gumNoAccessError = MediaMgrError::Name::NotAllowedError;
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", __FUNCTION__, mPrefs.mWidth, mPrefs.mHeight,
mPrefs.mFPS);
}
} else if (!strcmp(aTopic, "last-pb-context-exited")) {
// Clear memory of private-browsing-specific deviceIds. Fire and forget.
media::SanitizeOriginKeys(0, true);
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:got-device-permission")) {
MOZ_ASSERT(aSubject);
nsCOMPtr<nsIRunnable> task = do_QueryInterface(aSubject);
MediaManager::Dispatch(NewTaskFrom([task] { task->Run(); }));
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:privileged:allow") ||
!strcmp(aTopic, "getUserMedia:response:allow")) {
nsString key(aData);
RefPtr<GetUserMediaTask> task = TakeGetUserMediaTask(key);
if (!task) {
return NS_OK;
}
if (sHasShutdown) {
task->Denied(MediaMgrError::Name::AbortError, "In shutdown"_ns);
return NS_OK;
}
if (NS_WARN_IF(!aSubject)) {
return NS_ERROR_FAILURE; // ignored
}
// Permission has been granted. aSubject contains the particular device
// or devices selected and approved by the user, if any.
nsCOMPtr<nsIArray> array(do_QueryInterface(aSubject));
MOZ_ASSERT(array);
uint32_t len = 0;
array->GetLength(&len);
RefPtr<MediaDevice> audioInput;
RefPtr<MediaDevice> videoInput;
RefPtr<MediaDevice> audioOutput;
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsIMediaDevice> device;
array->QueryElementAt(i, NS_GET_IID(nsIMediaDevice),
getter_AddRefs(device));
MOZ_ASSERT(device); // shouldn't be returning anything else...
if (!device) {
continue;
}
// Casting here is safe because a MediaDevice is created
// only in Gecko side, JS can only query for an instance.
MediaDevice* dev = static_cast<MediaDevice*>(device.get());
switch (dev->mKind) {
case MediaDeviceKind::Videoinput:
if (!videoInput) {
videoInput = dev;
}
break;
case MediaDeviceKind::Audioinput:
if (!audioInput) {
audioInput = dev;
}
break;
case MediaDeviceKind::Audiooutput:
if (!audioOutput) {
audioOutput = dev;
}
break;
default:
MOZ_CRASH("Unexpected device kind");
}
}
if (GetUserMediaStreamTask* streamTask = task->AsGetUserMediaStreamTask()) {
bool needVideo = IsOn(streamTask->GetConstraints().mVideo);
bool needAudio = IsOn(streamTask->GetConstraints().mAudio);
MOZ_ASSERT(needVideo || needAudio);
if ((needVideo && !videoInput) || (needAudio && !audioInput)) {
task->Denied(MediaMgrError::Name::NotAllowedError);
return NS_OK;
}
streamTask->Allowed(std::move(audioInput), std::move(videoInput));
return NS_OK;
}
if (SelectAudioOutputTask* outputTask = task->AsSelectAudioOutputTask()) {
if (!audioOutput) {
task->Denied(MediaMgrError::Name::NotAllowedError);
return NS_OK;
}
outputTask->Allowed(std::move(audioOutput));
return NS_OK;
}
NS_WARNING("Unknown task type in getUserMedia");
return NS_ERROR_FAILURE;
} else if (IsGUMResponseNoAccess(aTopic, gumNoAccessError)) {
nsString key(aData);
RefPtr<GetUserMediaTask> task = TakeGetUserMediaTask(key);
if (task) {
task->Denied(gumNoAccessError);
SendPendingGUMRequest();
}
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:revoke")) {
uint64_t windowID;
if (ParseScreenColonWindowID(aData, &windowID) == MediaSourceEnum::Screen) {
LOG("Revoking ScreenCapture access for window %" PRIu64, windowID);
StopScreensharing(windowID);
} else {
LOG("Revoking MediaCapture access for window %" PRIu64, windowID);
OnNavigation(windowID);
}
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:muteVideo") ||
!strcmp(aTopic, "getUserMedia:unmuteVideo")) {
OnCameraMute(!strcmp(aTopic, "getUserMedia:muteVideo"));
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:muteAudio") ||
!strcmp(aTopic, "getUserMedia:unmuteAudio")) {
OnMicrophoneMute(!strcmp(aTopic, "getUserMedia:muteAudio"));
return NS_OK;
} else if ((!strcmp(aTopic, "application-background") ||
!strcmp(aTopic, "application-foreground")) &&
StaticPrefs::media_getusermedia_camera_background_mute_enabled()) {
// On mobile we turn off any cameras (but not mics) while in the background.
// Keeping things simple for now by duplicating test-covered code above.
//
// NOTE: If a mobile device ever wants to implement "getUserMedia:muteVideo"
// as well, it'd need to update this code to handle & test the combinations.
OnCameraMute(!strcmp(aTopic, "application-background"));
}
return NS_OK;
}
NS_IMETHODIMP
MediaManager::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) {
size_t amount = 0;
amount += mActiveWindows.ShallowSizeOfExcludingThis(MallocSizeOf);
for (const GetUserMediaWindowListener* listener : mActiveWindows.Values()) {
amount += listener->SizeOfIncludingThis(MallocSizeOf);
}
amount += mActiveCallbacks.ShallowSizeOfExcludingThis(MallocSizeOf);
for (const GetUserMediaTask* task : mActiveCallbacks.Values()) {
// Assume nsString buffers for keys are accounted in mCallIds.
amount += task->SizeOfIncludingThis(MallocSizeOf);
}
amount += mCallIds.ShallowSizeOfExcludingThis(MallocSizeOf);
for (const auto& array : mCallIds.Values()) {
amount += array->ShallowSizeOfExcludingThis(MallocSizeOf);
for (const nsString& callID : *array) {
amount += callID.SizeOfExcludingThisEvenIfShared(MallocSizeOf);
}
}
amount += mPendingGUMRequest.ShallowSizeOfExcludingThis(MallocSizeOf);
// GetUserMediaRequest pointees of mPendingGUMRequest do not have support
// for memory accounting. mPendingGUMRequest logic should probably be moved
// to the front end (bug 1691625).
amount += mDeviceIDs.shallowSizeOfExcludingThis(MallocSizeOf);
for (auto iter = mDeviceIDs.iter(); !iter.done(); iter.next()) {
const nsString deviceID = iter.get();
amount += deviceID.SizeOfExcludingThisEvenIfShared(MallocSizeOf);
}
MOZ_COLLECT_REPORT("explicit/media/media-manager-aggregates", KIND_HEAP,
UNITS_BYTES, amount,
"Memory used by MediaManager variable length members.");
return NS_OK;
}
nsresult MediaManager::GetActiveMediaCaptureWindows(nsIArray** aArray) {
MOZ_ASSERT(aArray);
nsCOMPtr<nsIMutableArray> array = nsArray::Create();
for (const auto& entry : mActiveWindows) {
const uint64_t& id = entry.GetKey();
RefPtr<GetUserMediaWindowListener> winListener = entry.GetData();
if (!winListener) {
continue;
}
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(id);
MOZ_ASSERT(window);
// XXXkhuey ...
if (!window) {
continue;
}
if (winListener->CapturingVideo() || winListener->CapturingAudio()) {
array->AppendElement(ToSupports(window));
}
}
array.forget(aArray);
return NS_OK;
}
struct CaptureWindowStateData {
uint16_t* mCamera;
uint16_t* mMicrophone;
uint16_t* mScreenShare;
uint16_t* mWindowShare;
uint16_t* mAppShare;
uint16_t* mBrowserShare;
};
NS_IMETHODIMP
MediaManager::MediaCaptureWindowState(
nsIDOMWindow* aCapturedWindow, uint16_t* aCamera, uint16_t* aMicrophone,
uint16_t* aScreen, uint16_t* aWindow, uint16_t* aBrowser,
nsTArray<RefPtr<nsIMediaDevice>>& aDevices) {
MOZ_ASSERT(NS_IsMainThread());
CaptureState camera = CaptureState::Off;
CaptureState microphone = CaptureState::Off;
CaptureState screen = CaptureState::Off;
CaptureState window = CaptureState::Off;
CaptureState browser = CaptureState::Off;
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
nsCOMPtr<nsPIDOMWindowInner> piWin = do_QueryInterface(aCapturedWindow);
if (piWin) {
if (RefPtr<GetUserMediaWindowListener> listener =
GetWindowListener(piWin->WindowID())) {
camera = listener->CapturingSource(MediaSourceEnum::Camera);
microphone = listener->CapturingSource(MediaSourceEnum::Microphone);
screen = listener->CapturingSource(MediaSourceEnum::Screen);
window = listener->CapturingSource(MediaSourceEnum::Window);
browser = listener->CapturingSource(MediaSourceEnum::Browser);
listener->GetDevices(devices);
}
}
*aCamera = FromCaptureState(camera);
*aMicrophone = FromCaptureState(microphone);
*aScreen = FromCaptureState(screen);
*aWindow = FromCaptureState(window);
*aBrowser = FromCaptureState(browser);
for (auto& device : *devices) {
aDevices.AppendElement(device);
}
LOG("%s: window %" PRIu64 " capturing %s %s %s %s %s", __FUNCTION__,
piWin ? piWin->WindowID() : -1,
*aCamera == nsIMediaManagerService::STATE_CAPTURE_ENABLED
? "camera (enabled)"
: (*aCamera == nsIMediaManagerService::STATE_CAPTURE_DISABLED
? "camera (disabled)"
: ""),
*aMicrophone == nsIMediaManagerService::STATE_CAPTURE_ENABLED
? "microphone (enabled)"
: (*aMicrophone == nsIMediaManagerService::STATE_CAPTURE_DISABLED
? "microphone (disabled)"
: ""),
*aScreen ? "screenshare" : "", *aWindow ? "windowshare" : "",
*aBrowser ? "browsershare" : "");
return NS_OK;
}
NS_IMETHODIMP
MediaManager::SanitizeDeviceIds(int64_t aSinceWhen) {
MOZ_ASSERT(NS_IsMainThread());
LOG("%s: sinceWhen = %" PRId64, __FUNCTION__, aSinceWhen);
media::SanitizeOriginKeys(aSinceWhen, false); // we fire and forget
return NS_OK;
}
void MediaManager::StopScreensharing(uint64_t aWindowID) {
// We need to stop window/screensharing for all streams in this innerwindow.
if (RefPtr<GetUserMediaWindowListener> listener =
GetWindowListener(aWindowID)) {
listener->StopSharing();
}
}
bool MediaManager::IsActivelyCapturingOrHasAPermission(uint64_t aWindowId) {
// Does page currently have a gUM stream active?
nsCOMPtr<nsIArray> array;
GetActiveMediaCaptureWindows(getter_AddRefs(array));
uint32_t len;
array->GetLength(&len);
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsPIDOMWindowInner> win;
array->QueryElementAt(i, NS_GET_IID(nsPIDOMWindowInner),
getter_AddRefs(win));
if (win && win->WindowID() == aWindowId) {
return true;
}
}
// Or are persistent permissions (audio or video) granted?
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowId);
if (NS_WARN_IF(!window) || NS_WARN_IF(!window->GetPrincipal())) {
return false;
}
Document* doc = window->GetExtantDoc();
if (NS_WARN_IF(!doc)) {
return false;
}
nsIPrincipal* principal = window->GetPrincipal();
if (NS_WARN_IF(!principal)) {
return false;
}
// Check if this site has persistent permissions.
nsresult rv;
RefPtr<PermissionDelegateHandler> permDelegate =
doc->GetPermissionDelegateHandler();
if (NS_WARN_IF(!permDelegate)) {
return false;
}
uint32_t audio = nsIPermissionManager::UNKNOWN_ACTION;
uint32_t video = nsIPermissionManager::UNKNOWN_ACTION;
{
rv = permDelegate->GetPermission("microphone"_ns, &audio, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
rv = permDelegate->GetPermission("camera"_ns, &video, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
return audio == nsIPermissionManager::ALLOW_ACTION ||
video == nsIPermissionManager::ALLOW_ACTION;
}
DeviceListener::DeviceListener()
: mStopped(false),
mMainThreadCheck(nullptr),
mPrincipalHandle(PRINCIPAL_HANDLE_NONE),
mWindowListener(nullptr) {}
void DeviceListener::Register(GetUserMediaWindowListener* aListener) {
LOG("DeviceListener %p registering with window listener %p", this, aListener);
MOZ_ASSERT(aListener, "No listener");
MOZ_ASSERT(!mWindowListener, "Already registered");
MOZ_ASSERT(!Activated(), "Already activated");
mPrincipalHandle = aListener->GetPrincipalHandle();
mWindowListener = aListener;
}
void DeviceListener::Activate(RefPtr<MediaDevice> aDevice,
RefPtr<LocalTrackSource> aTrackSource,
bool aStartMuted) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
LOG("DeviceListener %p activating %s device %p", this,
nsCString(dom::MediaDeviceKindValues::GetString(aDevice->mKind)).get(),
aDevice.get());
MOZ_ASSERT(!mStopped, "Cannot activate stopped device listener");
MOZ_ASSERT(!Activated(), "Already activated");
mMainThreadCheck = PR_GetCurrentThread();
bool offWhileDisabled =
(aDevice->GetMediaSource() == MediaSourceEnum::Microphone &&
Preferences::GetBool(
"media.getusermedia.microphone.off_while_disabled.enabled", true)) ||
(aDevice->GetMediaSource() == MediaSourceEnum::Camera &&
Preferences::GetBool(
"media.getusermedia.camera.off_while_disabled.enabled", true));
mDeviceState = MakeUnique<DeviceState>(
std::move(aDevice), std::move(aTrackSource), offWhileDisabled);
mDeviceState->mDeviceMuted = aStartMuted;
if (aStartMuted) {
mDeviceState->mTrackSource->Mute();
}
}
RefPtr<DeviceListener::DeviceListenerPromise>
DeviceListener::InitializeAsync() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_DIAGNOSTIC_ASSERT(!mStopped);
return MediaManager::Dispatch<DeviceListenerPromise>(
__func__,
[principal = GetPrincipalHandle(), device = mDeviceState->mDevice,
track = mDeviceState->mTrackSource->mTrack,
deviceMuted = mDeviceState->mDeviceMuted](
MozPromiseHolder<DeviceListenerPromise>& aHolder) {
device->SetTrack(track, principal);
nsresult rv = deviceMuted ? NS_OK : device->Start();
if (device->mKind == MediaDeviceKind::Audioinput) {
if (rv == NS_ERROR_NOT_AVAILABLE) {
PR_Sleep(200);
rv = device->Start();
}
if (rv == NS_ERROR_NOT_AVAILABLE) {
nsCString log;
log.AssignLiteral("Concurrent mic process limit.");
aHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::NotReadableError,
std::move(log)),
__func__);
return;
}
}
if (NS_FAILED(rv)) {
nsCString log;
log.AppendPrintf(
"Starting %s failed",
nsCString(
dom::MediaDeviceKindValues::GetString(device->mKind))
.get());
aHolder.Reject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
std::move(log)),
__func__);
return;
}
LOG("started %s device %p",
nsCString(
dom::MediaDeviceKindValues::GetString(device->mKind))
.get(),
device.get());
aHolder.Resolve(true, __func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self = RefPtr<DeviceListener>(this), this]() {
if (mStopped) {
// We were shut down during the async init
return DeviceListenerPromise::CreateAndResolve(true, __func__);
}
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mTrackEnabled);
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mDeviceEnabled);
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mStopped);
mDeviceState->mDeviceEnabled = true;
mDeviceState->mTrackEnabled = true;
mDeviceState->mTrackEnabledTime = TimeStamp::Now();
return DeviceListenerPromise::CreateAndResolve(true, __func__);
},
[self = RefPtr<DeviceListener>(this),
this](RefPtr<MediaMgrError>&& aResult) {
if (mStopped) {
return DeviceListenerPromise::CreateAndReject(std::move(aResult),
__func__);
}
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mTrackEnabled);
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mDeviceEnabled);
MOZ_DIAGNOSTIC_ASSERT(!mDeviceState->mStopped);
Stop();
return DeviceListenerPromise::CreateAndReject(std::move(aResult),
__func__);
});
}
void DeviceListener::Stop() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
if (mStopped) {
return;
}
mStopped = true;
LOG("DeviceListener %p stopping", this);
if (mDeviceState) {
mDeviceState->mDisableTimer->Cancel();
if (mDeviceState->mStopped) {
// device already stopped.
return;
}
mDeviceState->mStopped = true;
mDeviceState->mTrackSource->Stop();
MediaManager::Dispatch(NewTaskFrom([device = mDeviceState->mDevice]() {
device->Stop();
device->Deallocate();
}));
mWindowListener->ChromeAffectingStateChanged();
}
// Keep a strong ref to the removed window listener.
RefPtr<GetUserMediaWindowListener> windowListener = mWindowListener;
mWindowListener = nullptr;
windowListener->Remove(this);
}
void DeviceListener::GetSettings(MediaTrackSettings& aOutSettings) const {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MediaDevice* device = GetDevice();
device->GetSettings(aOutSettings);
MediaSourceEnum mediaSource = device->GetMediaSource();
if (mediaSource == MediaSourceEnum::Camera ||
mediaSource == MediaSourceEnum::Microphone) {
aOutSettings.mDeviceId.Construct(device->mID);
aOutSettings.mGroupId.Construct(device->mGroupID);
}
}
auto DeviceListener::UpdateDevice(bool aOn) -> RefPtr<DeviceOperationPromise> {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<DeviceListener> self = this;
DeviceState& state = *mDeviceState;
return MediaManager::Dispatch<DeviceOperationPromise>(
__func__,
[self, device = state.mDevice,
aOn](MozPromiseHolder<DeviceOperationPromise>& h) {
LOG("Turning %s device (%s)", aOn ? "on" : "off",
NS_ConvertUTF16toUTF8(device->mName).get());
h.Resolve(aOn ? device->Start() : device->Stop(), __func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self, this, &state, aOn](nsresult aResult) {
if (state.mStopped) {
// Device was stopped on main thread during the operation. Done.
return DeviceOperationPromise::CreateAndResolve(aResult,
__func__);
}
LOG("DeviceListener %p turning %s %s input device %s", this,
aOn ? "on" : "off",
nsCString(
dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get(),
NS_SUCCEEDED(aResult) ? "succeeded" : "failed");
if (NS_FAILED(aResult) && aResult != NS_ERROR_ABORT) {
// This path handles errors from starting or stopping the
// device. NS_ERROR_ABORT are for cases where *we* aborted. They
// need graceful handling.
if (aOn) {
// Starting the device failed. Stopping the track here will
// make the MediaStreamTrack end after a pass through the
// MediaTrackGraph.
Stop();
} else {
// Stopping the device failed. This is odd, but not fatal.
MOZ_ASSERT_UNREACHABLE("The device should be stoppable");
}
}
return DeviceOperationPromise::CreateAndResolve(aResult, __func__);
},
[]() {
MOZ_ASSERT_UNREACHABLE("Unexpected and unhandled reject");
return DeviceOperationPromise::CreateAndReject(false, __func__);
});
}
void DeviceListener::SetDeviceEnabled(bool aEnable) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_ASSERT(Activated(), "No device to set enabled state for");
DeviceState& state = *mDeviceState;
LOG("DeviceListener %p %s %s device", this,
aEnable ? "enabling" : "disabling",
nsCString(dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get());
state.mTrackEnabled = aEnable;
if (state.mStopped) {
// Device terminally stopped. Updating device state is pointless.
return;
}
if (state.mOperationInProgress) {
// If a timer is in progress, it needs to be canceled now so the next
// DisableTrack() gets a fresh start. Canceling will trigger another
// operation.
state.mDisableTimer->Cancel();
return;
}
if (state.mDeviceEnabled == aEnable) {
// Device is already in the desired state.
return;
}
// All paths from here on must end in setting
// `state.mOperationInProgress` to false.
state.mOperationInProgress = true;
RefPtr<MediaTimerPromise> timerPromise;
if (aEnable) {
timerPromise = MediaTimerPromise::CreateAndResolve(true, __func__);
state.mTrackEnabledTime = TimeStamp::Now();
} else {
const TimeDuration maxDelay =
TimeDuration::FromMilliseconds(Preferences::GetUint(
GetDevice()->mKind == MediaDeviceKind::Audioinput
? "media.getusermedia.microphone.off_while_disabled.delay_ms"
: "media.getusermedia.camera.off_while_disabled.delay_ms",
3000));
const TimeDuration durationEnabled =
TimeStamp::Now() - state.mTrackEnabledTime;
const TimeDuration delay = TimeDuration::Max(
TimeDuration::FromMilliseconds(0), maxDelay - durationEnabled);
timerPromise = state.mDisableTimer->WaitFor(delay, __func__);
}
RefPtr<DeviceListener> self = this;
timerPromise
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self, this, &state, aEnable]() mutable {
MOZ_ASSERT(state.mDeviceEnabled != aEnable,
"Device operation hasn't started");
MOZ_ASSERT(state.mOperationInProgress,
"It's our responsibility to reset the inProgress state");
LOG("DeviceListener %p %s %s device - starting device operation",
this, aEnable ? "enabling" : "disabling",
nsCString(
dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get());
if (state.mStopped) {
// Source was stopped between timer resolving and this runnable.
return DeviceOperationPromise::CreateAndResolve(NS_ERROR_ABORT,
__func__);
}
state.mDeviceEnabled = aEnable;
if (mWindowListener) {
mWindowListener->ChromeAffectingStateChanged();
}
if (!state.mOffWhileDisabled || state.mDeviceMuted) {
// If the feature to turn a device off while disabled is itself
// disabled, or the device is currently user agent muted, then
// we shortcut the device operation and tell the
// ux-updating code that everything went fine.
return DeviceOperationPromise::CreateAndResolve(NS_OK, __func__);
}
return UpdateDevice(aEnable);
},
[]() {
// Timer was canceled by us. We signal this with NS_ERROR_ABORT.
return DeviceOperationPromise::CreateAndResolve(NS_ERROR_ABORT,
__func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self, this, &state, aEnable](nsresult aResult) mutable {
MOZ_ASSERT_IF(aResult != NS_ERROR_ABORT,
state.mDeviceEnabled == aEnable);
MOZ_ASSERT(state.mOperationInProgress);
state.mOperationInProgress = false;
if (state.mStopped) {
// Device was stopped on main thread during the operation.
// Nothing to do.
return;
}
if (NS_FAILED(aResult) && aResult != NS_ERROR_ABORT && !aEnable) {
// To keep our internal state sane in this case, we disallow
// future stops due to disable.
state.mOffWhileDisabled = false;
return;
}
// This path is for a device operation aResult that was success or
// NS_ERROR_ABORT (*we* canceled the operation).
// At this point we have to follow up on the intended state, i.e.,
// update the device state if the track state changed in the
// meantime.
if (state.mTrackEnabled != state.mDeviceEnabled) {
// Track state changed during this operation. We'll start over.
SetDeviceEnabled(state.mTrackEnabled);
}
},
[]() { MOZ_ASSERT_UNREACHABLE("Unexpected and unhandled reject"); });
}
void DeviceListener::SetDeviceMuted(bool aMute) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_ASSERT(Activated(), "No device to set muted state for");
DeviceState& state = *mDeviceState;
LOG("DeviceListener %p %s %s device", this, aMute ? "muting" : "unmuting",
nsCString(dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get());
if (state.mStopped) {
// Device terminally stopped. Updating device state is pointless.
return;
}
if (state.mDeviceMuted == aMute) {
// Device is already in the desired state.
return;
}
LOG("DeviceListener %p %s %s device - starting device operation", this,
aMute ? "muting" : "unmuting",
nsCString(dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get());
state.mDeviceMuted = aMute;
if (mWindowListener) {
mWindowListener->ChromeAffectingStateChanged();
}
// Update trackSource to fire mute/unmute events on all its tracks
if (aMute) {
state.mTrackSource->Mute();
} else {
state.mTrackSource->Unmute();
}
if (!state.mOffWhileDisabled || !state.mDeviceEnabled) {
// If the pref to turn the underlying device is itself off, or the device
// is already off, it's unecessary to do anything else.
return;
}
UpdateDevice(!aMute);
}
void DeviceListener::MuteOrUnmuteCamera(bool aMute) {
MOZ_ASSERT(NS_IsMainThread());
if (mStopped) {
return;
}
MOZ_RELEASE_ASSERT(mWindowListener);
LOG("DeviceListener %p MuteOrUnmuteCamera: %s", this,
aMute ? "mute" : "unmute");
if (GetDevice() &&
(GetDevice()->GetMediaSource() == MediaSourceEnum::Camera)) {
SetDeviceMuted(aMute);
}
}
void DeviceListener::MuteOrUnmuteMicrophone(bool aMute) {
MOZ_ASSERT(NS_IsMainThread());
if (mStopped) {
return;
}
MOZ_RELEASE_ASSERT(mWindowListener);
LOG("DeviceListener %p MuteOrUnmuteMicrophone: %s", this,
aMute ? "mute" : "unmute");
if (GetDevice() &&
(GetDevice()->GetMediaSource() == MediaSourceEnum::Microphone)) {
SetDeviceMuted(aMute);
}
}
bool DeviceListener::CapturingVideo() const {
MOZ_ASSERT(NS_IsMainThread());
return Activated() && mDeviceState && !mDeviceState->mStopped &&
MediaEngineSource::IsVideo(GetDevice()->GetMediaSource()) &&
(!GetDevice()->mIsFake ||
Preferences::GetBool("media.navigator.permission.fake"));
}
bool DeviceListener::CapturingAudio() const {
MOZ_ASSERT(NS_IsMainThread());
return Activated() && mDeviceState && !mDeviceState->mStopped &&
MediaEngineSource::IsAudio(GetDevice()->GetMediaSource()) &&
(!GetDevice()->mIsFake ||
Preferences::GetBool("media.navigator.permission.fake"));
}
CaptureState DeviceListener::CapturingSource(MediaSourceEnum aSource) const {
MOZ_ASSERT(NS_IsMainThread());
if (GetDevice()->GetMediaSource() != aSource) {
// This DeviceListener doesn't capture a matching source
return CaptureState::Off;
}
if (mDeviceState->mStopped) {
// The source is a match but has been permanently stopped
return CaptureState::Off;
}
if ((aSource == MediaSourceEnum::Camera ||
aSource == MediaSourceEnum::Microphone) &&
GetDevice()->mSource->IsFake() &&
!Preferences::GetBool("media.navigator.permission.fake")) {
// Fake Camera and Microphone only count if there is no fake permission
return CaptureState::Off;
}
// Source is a match and is active and unmuted
if (mDeviceState->mDeviceEnabled && !mDeviceState->mDeviceMuted) {
return CaptureState::Enabled;
}
return CaptureState::Disabled;
}
RefPtr<DeviceListener::DeviceListenerPromise> DeviceListener::ApplyConstraints(
const MediaTrackConstraints& aConstraints, CallerType aCallerType) {
MOZ_ASSERT(NS_IsMainThread());
if (mStopped || mDeviceState->mStopped) {
LOG("DeviceListener %p %s device applyConstraints, but device is stopped",
this,
nsCString(dom::MediaDeviceKindValues::GetString(GetDevice()->mKind))
.get());
return DeviceListenerPromise::CreateAndResolve(false, __func__);
}
MediaManager* mgr = MediaManager::GetIfExists();
if (!mgr) {
return DeviceListenerPromise::CreateAndResolve(false, __func__);
}
return MediaManager::Dispatch<DeviceListenerPromise>(
__func__, [device = mDeviceState->mDevice, aConstraints, aCallerType](
MozPromiseHolder<DeviceListenerPromise>& aHolder) mutable {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MediaManager* mgr = MediaManager::GetIfExists();
MOZ_RELEASE_ASSERT(mgr); // Must exist while media thread is alive
const char* badConstraint = nullptr;
nsresult rv =
device->Reconfigure(aConstraints, mgr->mPrefs, &badConstraint);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_INVALID_ARG) {
// Reconfigure failed due to constraints
if (!badConstraint) {
nsTArray<RefPtr<MediaDevice>> devices;
devices.AppendElement(device);
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(aConstraints), devices, aCallerType);
}
} else {
// Unexpected. ApplyConstraints* cannot fail with any other error.
badConstraint = "";
LOG("ApplyConstraints-Task: Unexpected fail %" PRIx32,
static_cast<uint32_t>(rv));
}
aHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::OverconstrainedError, "",
NS_ConvertASCIItoUTF16(badConstraint)),
__func__);
return;
}
// Reconfigure was successful
aHolder.Resolve(false, __func__);
});
}
PrincipalHandle DeviceListener::GetPrincipalHandle() const {
return mPrincipalHandle;
}
void GetUserMediaWindowListener::StopSharing() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
for (auto& l : mActiveListeners.Clone()) {
MediaSourceEnum source = l->GetDevice()->GetMediaSource();
if (source == MediaSourceEnum::Screen ||
source == MediaSourceEnum::Window ||
source == MediaSourceEnum::AudioCapture) {
l->Stop();
}
}
}
void GetUserMediaWindowListener::StopRawID(const nsString& removedDeviceID) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
for (auto& l : mActiveListeners.Clone()) {
nsString id;
l->GetDevice()->GetRawId(id);
if (removedDeviceID.Equals(id)) {
l->Stop();
}
}
}
void GetUserMediaWindowListener::MuteOrUnmuteCameras(bool aMute) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
if (mCamerasAreMuted == aMute) {
return;
}
mCamerasAreMuted = aMute;
for (auto& l : mActiveListeners) {
if (l->GetDevice()->mKind == MediaDeviceKind::Videoinput) {
l->MuteOrUnmuteCamera(aMute);
}
}
}
void GetUserMediaWindowListener::MuteOrUnmuteMicrophones(bool aMute) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
if (mMicrophonesAreMuted == aMute) {
return;
}
mMicrophonesAreMuted = aMute;
for (auto& l : mActiveListeners) {
if (l->GetDevice()->mKind == MediaDeviceKind::Audioinput) {
l->MuteOrUnmuteMicrophone(aMute);
}
}
}
void GetUserMediaWindowListener::ChromeAffectingStateChanged() {
MOZ_ASSERT(NS_IsMainThread());
// We wait until stable state before notifying chrome so chrome only does
// one update if more updates happen in this event loop.
if (mChromeNotificationTaskPosted) {
return;
}
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod("GetUserMediaWindowListener::NotifyChrome", this,
&GetUserMediaWindowListener::NotifyChrome);
nsContentUtils::RunInStableState(runnable.forget());
mChromeNotificationTaskPosted = true;
}
void GetUserMediaWindowListener::NotifyChrome() {
MOZ_ASSERT(mChromeNotificationTaskPosted);
mChromeNotificationTaskPosted = false;
NS_DispatchToMainThread(NS_NewRunnableFunction(
"MediaManager::NotifyChrome", [windowID = mWindowID]() {
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(windowID);
if (!window) {
MOZ_ASSERT_UNREACHABLE("Should have window");
return;
}
nsresult rv = MediaManager::NotifyRecordingStatusChange(window);
if (NS_FAILED(rv)) {
MOZ_ASSERT_UNREACHABLE("Should be able to notify chrome");
return;
}
}));
}
#undef LOG
} // namespace mozilla
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