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 "AudioDeviceInfo.h"
#include "MediaStreamGraphImpl.h"
#include "MediaTimer.h"
#include "mozilla/dom/MediaStreamTrack.h"
#include "mozilla/dom/MediaDeviceInfo.h"
#include "MediaStreamListener.h"
#include "nsArray.h"
#include "nsContentUtils.h"
#include "nsGlobalWindow.h"
#include "nsHashPropertyBag.h"
#include "nsIEventTarget.h"
#include "nsIUUIDGenerator.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPermissionManager.h"
#include "nsIDocShell.h"
#include "mozilla/dom/Document.h"
#include "nsISupportsPrimitives.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIIDNService.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsICryptoHash.h"
#include "nsICryptoHMAC.h"
#include "nsIKeyModule.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsIInputStream.h"
#include "nsILineInputStream.h"
#include "nsIWeakReferenceUtils.h"
#include "nsPIDOMWindow.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/MozPromise.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Types.h"
#include "mozilla/PeerIdentity.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/FeaturePolicyUtils.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/MediaStreamBinding.h"
#include "mozilla/dom/MediaStreamTrackBinding.h"
#include "mozilla/dom/GetUserMediaRequestBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/MediaDevices.h"
#include "mozilla/Base64.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/media/MediaChild.h"
#include "mozilla/media/MediaTaskUtils.h"
#include "MediaTrackConstraints.h"
#include "VideoUtils.h"
#include "ThreadSafeRefcountingWithMainThreadDestruction.h"
#include "nsProxyRelease.h"
#include "nsVariant.h"
// For snprintf
#include "mozilla/Sprintf.h"
#include "nsJSUtils.h"
#include "nsGlobalWindow.h"
#include "nsIUUIDGenerator.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 "browser_logging/WebRtcLog.h"
# include "webrtc/modules/audio_processing/include/audio_processing.h"
#endif
#if defined(XP_WIN)
# include "mozilla/WindowsVersion.h"
# include <objbase.h>
# include <winsock2.h>
# include <iphlpapi.h>
# include <tchar.h>
#endif
// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
// GetTickCount() and conflicts with MediaStream::GetCurrentTime.
#ifdef GetCurrentTime
# undef GetCurrentTime
#endif
// XXX Workaround for bug 986974 to maintain the existing broken semantics
template <>
struct nsIMediaDevice::COMTypeInfo<mozilla::MediaDevice, void> {
static const nsIID kIID;
};
const nsIID nsIMediaDevice::COMTypeInfo<mozilla::MediaDevice, void>::kIID =
NS_IMEDIADEVICE_IID;
// 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 {
#ifdef LOG
# undef LOG
#endif
LazyLogModule gMediaManagerLog("MediaManager");
#define LOG(...) MOZ_LOG(gMediaManagerLog, LogLevel::Debug, (__VA_ARGS__))
using dom::BasicTrackSource;
using dom::CallerType;
using dom::ConstrainDOMStringParameters;
using dom::ConstrainDoubleRange;
using dom::ConstrainLongRange;
using dom::DisplayMediaStreamConstraints;
using dom::Document;
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::MozGetUserMediaDevicesSuccessCallback;
using dom::OwningBooleanOrMediaTrackConstraints;
using dom::OwningStringOrStringSequence;
using dom::OwningStringOrStringSequenceOrConstrainDOMStringParameters;
using dom::Promise;
using dom::Sequence;
using media::NewRunnableFrom;
using media::NewTaskFrom;
using media::Refcountable;
static Atomic<bool> sHasShutdown;
struct DeviceState {
DeviceState(RefPtr<MediaDevice> aDevice, bool aOffWhileDisabled)
: mOffWhileDisabled(aOffWhileDisabled), mDevice(std::move(aDevice)) {
MOZ_ASSERT(mDevice);
}
// true if we have stopped mDevice, this is a terminal state.
// MainThread only.
bool mStopped = false;
// true if mDevice is currently enabled, i.e., turned on and capturing.
// MainThread only.
bool mDeviceEnabled = false;
// 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.
// 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;
};
/**
* 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);
}
/**
* SourceListener has threadsafe refcounting for use across the main, media and
* MSG 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 SourceListener : public SupportsWeakPtr<SourceListener> {
public:
typedef MozPromise<bool /* aIgnored */, RefPtr<MediaMgrError>, true>
SourceListenerPromise;
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(SourceListener)
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_MAIN_THREAD_DESTRUCTION_AND_RECORDING(
SourceListener, recordreplay::Behavior::Preserve)
SourceListener();
/**
* Registers this source listener as belonging to the given window listener.
*/
void Register(GetUserMediaWindowListener* aListener);
/**
* Marks this listener as active and adds itself as a listener to aStream.
*/
void Activate(RefPtr<SourceMediaStream> aStream,
RefPtr<MediaDevice> aAudioDevice,
RefPtr<MediaDevice> aVideoDevice);
/**
* Posts a task to initialize and start all associated devices.
*/
RefPtr<SourceListenerPromise> InitializeAsync();
/**
* Stops all live tracks, finishes the associated MediaStream and cleans up
* the weak reference to the associated window listener.
* This will also tell the window listener to remove its hard reference to
* this SourceListener, so any caller will need to keep its own hard ref.
*/
void Stop();
/**
* Posts a task to stop the device associated with aTrackID and notifies the
* associated window listener that a track was stopped.
* Should this track be the last live one to be stopped, we'll also call Stop.
* This might tell the window listener to remove its hard reference to this
* SourceListener, so any caller will need to keep its own hard ref.
*/
void StopTrack(TrackID aTrackID);
/**
* Gets the main thread MediaTrackSettings from the MediaEngineSource
* associated with aTrackID.
*/
void GetSettingsFor(TrackID aTrackID, MediaTrackSettings& aOutSettings) const;
/**
* Posts a task to set the enabled state of the device associated with
* aTrackID 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 SetEnabledFor(TrackID aTrackID, bool aEnabled);
/**
* Stops all screen/app/window/audioCapture sharing, but not camera or
* microphone.
*/
void StopSharing();
MediaStream* Stream() const { return mStream; }
SourceMediaStream* GetSourceStream();
MediaDevice* GetAudioDevice() const {
return mAudioDeviceState ? mAudioDeviceState->mDevice.get() : nullptr;
}
MediaDevice* GetVideoDevice() const {
return mVideoDeviceState ? mVideoDeviceState->mDevice.get() : nullptr;
}
bool Activated() const { return mStream; }
bool Stopped() const { return mStopped; }
bool CapturingVideo() const;
bool CapturingAudio() const;
CaptureState CapturingSource(MediaSourceEnum aSource) const;
RefPtr<SourceListenerPromise> ApplyConstraintsToTrack(
TrackID aTrackID, const MediaTrackConstraints& aConstraints,
CallerType aCallerType);
PrincipalHandle GetPrincipalHandle() const;
private:
virtual ~SourceListener() = default;
/**
* Returns a pointer to the device state for aTrackID.
*
* This is intended for internal use where we need to figure out which state
* corresponds to aTrackID, not for availability checks. As such, we assert
* that the device does indeed exist.
*
* Since this is a raw pointer and the state lifetime depends on the
* SourceListener's lifetime, it's internal use only.
*/
DeviceState& GetDeviceStateFor(TrackID aTrackID) const;
// 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 MediaStreamGraph thread, MediaManager thread, and MainThread
// No locking needed as they're set on Activate() and never assigned to again.
UniquePtr<DeviceState> mAudioDeviceState;
UniquePtr<DeviceState> mVideoDeviceState;
RefPtr<SourceMediaStream> mStream; // threadsafe refcnt
};
/**
* This class represents a WindowID and handles all MediaStreamTrackListeners
* (here subclassed as SourceListeners) used to feed GetUserMedia source
* streams. It proxies feedback from them into messages for browser chrome.
* The SourceListeners 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(base::Thread* aThread, uint64_t aWindowID,
const PrincipalHandle& aPrincipalHandle)
: mMediaThread(aThread),
mWindowID(aWindowID),
mPrincipalHandle(aPrincipalHandle),
mChromeNotificationTaskPosted(false) {}
/**
* Registers an inactive gUM source listener for this WindowListener.
*/
void Register(RefPtr<SourceListener> 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 source listener for this
* WindowListener.
*/
void Activate(RefPtr<SourceListener> aListener,
RefPtr<SourceMediaStream> aStream,
RefPtr<MediaDevice> aAudioDevice,
RefPtr<MediaDevice> aVideoDevice) {
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");
mInactiveListeners.RemoveElement(aListener);
aListener->Activate(std::move(aStream), std::move(aAudioDevice),
std::move(aVideoDevice));
mActiveListeners.AppendElement(std::move(aListener));
}
/**
* Removes all SourceListeners 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 : nsTArray<RefPtr<SourceListener>>(mInactiveListeners)) {
Remove(l);
}
for (auto& l : nsTArray<RefPtr<SourceListener>>(mActiveListeners)) {
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(),
EventStateManager::IsHandlingUserInput());
obs->NotifyObservers(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.
*/
bool Remove(RefPtr<SourceListener> 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 SourceListener should only be once in one of "
"mInactiveListeners and mActiveListeners");
MOZ_ASSERT(!mActiveListeners.Contains(aListener),
"A SourceListener should only be once in one of "
"mInactiveListeners and mActiveListeners");
LOG("GUMWindowListener %p stopping SourceListener %p.", this,
aListener.get());
aListener->Stop();
if (MediaDevice* removedDevice = aListener->GetVideoDevice()) {
bool revokeVideoPermission = true;
nsString removedRawId;
nsString removedSourceType;
removedDevice->GetRawId(removedRawId);
removedDevice->GetMediaSource(removedSourceType);
for (const auto& l : mActiveListeners) {
if (MediaDevice* device = l->GetVideoDevice()) {
nsString rawId;
device->GetRawId(rawId);
if (removedRawId.Equals(rawId)) {
revokeVideoPermission = false;
break;
}
}
}
if (revokeVideoPermission) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(mWindowID);
auto req = MakeRefPtr<GetUserMediaRequest>(
window, removedRawId, removedSourceType,
EventStateManager::IsHandlingUserInput());
obs->NotifyObservers(req, "recording-device-stopped", nullptr);
}
}
if (MediaDevice* removedDevice = aListener->GetAudioDevice()) {
bool revokeAudioPermission = true;
nsString removedRawId;
nsString removedSourceType;
removedDevice->GetRawId(removedRawId);
removedDevice->GetMediaSource(removedSourceType);
for (const auto& l : mActiveListeners) {
if (MediaDevice* device = l->GetAudioDevice()) {
nsString rawId;
device->GetRawId(rawId);
if (removedRawId.Equals(rawId)) {
revokeAudioPermission = false;
break;
}
}
}
if (revokeAudioPermission) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(mWindowID);
auto req = MakeRefPtr<GetUserMediaRequest>(
window, removedRawId, removedSourceType,
EventStateManager::IsHandlingUserInput());
obs->NotifyObservers(req, "recording-device-stopped", nullptr);
}
}
if (mInactiveListeners.Length() == 0 && mActiveListeners.Length() == 0) {
LOG("GUMWindowListener %p Removed last SourceListener. 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;
}
void StopSharing();
void StopRawID(const nsString& removedDeviceID);
/**
* Called by one of our SourceListeners 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;
}
uint64_t WindowID() const { return mWindowID; }
PrincipalHandle GetPrincipalHandle() const { return mPrincipalHandle; }
private:
~GetUserMediaWindowListener() {
MOZ_ASSERT(mInactiveListeners.Length() == 0,
"Inactive listeners should already be removed");
MOZ_ASSERT(mActiveListeners.Length() == 0,
"Active listeners should already be removed");
Unused << mMediaThread;
// It's OK to release mStream on any thread; they have thread-safe
// refcounts.
}
// Set at construction
base::Thread* mMediaThread;
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<SourceListener>> mInactiveListeners;
nsTArray<RefPtr<SourceListener>> mActiveListeners;
};
/**
* 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()),
mType(NS_ConvertUTF8toUTF16(
dom::MediaDeviceKindValues::strings[uint32_t(mKind)].value)),
mName(aName),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID) {
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),
mType(NS_ConvertUTF8toUTF16(
dom::MediaDeviceKindValues::strings[uint32_t(mKind)].value)),
mName(mSinkInfo->Name()),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID) {
// 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)
: mSource(aOther->mSource),
mSinkInfo(aOther->mSinkInfo),
mKind(aOther->mKind),
mScary(aOther->mScary),
mType(aOther->mType),
mName(aOther->mName),
mID(aID),
mGroupID(aGroupID),
mRawID(aRawID) {
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,
bool aIsChrome) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
// Forward request to underlying object to interrogate per-mode capabilities.
// Pass in device's origin-specific id for deviceId constraint comparison.
const nsString& id = aIsChrome ? mRawID : mID;
return mSource->GetBestFitnessDistance(aConstraintSets, id);
}
NS_IMETHODIMP
MediaDevice::GetName(nsAString& aName) {
MOZ_ASSERT(NS_IsMainThread());
aName.Assign(mName);
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::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 mSource is const.
NS_IMETHODIMP
MediaDevice::GetMediaSource(nsAString& aMediaSource) {
aMediaSource.Assign(NS_ConvertUTF8toUTF16(
dom::MediaSourceEnumValues::strings[uint32_t(GetMediaSource())].value));
return NS_OK;
}
nsresult MediaDevice::Allocate(const MediaTrackConstraints& aConstraints,
const MediaEnginePrefs& aPrefs,
const ipc::PrincipalInfo& aPrincipalInfo,
const char** aOutBadConstraint) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
return mSource->Allocate(aConstraints, aPrefs, mID, aPrincipalInfo,
aOutBadConstraint);
}
void MediaDevice::SetTrack(const RefPtr<SourceMediaStream>& aStream,
TrackID aTrackID,
const PrincipalHandle& aPrincipalHandle) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
MOZ_ASSERT(mSource);
mSource->SetTrack(aStream, aTrackID, 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);
return mSource->Reconfigure(aConstraints, aPrefs, mID, 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 bool IsOn(const OwningBooleanOrMediaTrackConstraints& aUnion) {
return !aUnion.IsBoolean() || aUnion.GetAsBoolean();
}
static const MediaTrackConstraints& GetInvariant(
const OwningBooleanOrMediaTrackConstraints& aUnion) {
static const MediaTrackConstraints empty;
return aUnion.IsMediaTrackConstraints() ? aUnion.GetAsMediaTrackConstraints()
: empty;
}
/**
* Creates a MediaStream, attaches a listener and fires off a success callback
* to the DOM with the stream. We also pass in the error callback so it can
* be released correctly.
*
* All of this must be done on the main thread!
*
* Note that the various GetUserMedia Runnable classes currently allow for
* two streams. If we ever need to support getting more than two streams
* at once, we could convert everything to nsTArray<RefPtr<blah> >'s,
* though that would complicate the constructors some. Currently the
* GetUserMedia spec does not allow for more than 2 streams to be obtained in
* one call, to simplify handling of constraints.
*/
class GetUserMediaStreamRunnable : public Runnable {
public:
GetUserMediaStreamRunnable(
MozPromiseHolder<MediaManager::StreamPromise>&& aHolder,
uint64_t aWindowID, RefPtr<GetUserMediaWindowListener> aWindowListener,
RefPtr<SourceListener> aSourceListener,
const ipc::PrincipalInfo& aPrincipalInfo,
const MediaStreamConstraints& aConstraints,
RefPtr<MediaDevice> aAudioDevice, RefPtr<MediaDevice> aVideoDevice,
RefPtr<PeerIdentity> aPeerIdentity, bool aIsChrome)
: Runnable("GetUserMediaStreamRunnable"),
mHolder(std::move(aHolder)),
mConstraints(aConstraints),
mAudioDevice(std::move(aAudioDevice)),
mVideoDevice(std::move(aVideoDevice)),
mWindowID(aWindowID),
mWindowListener(std::move(aWindowListener)),
mSourceListener(std::move(aSourceListener)),
mPrincipalInfo(aPrincipalInfo),
mPeerIdentity(std::move(aPeerIdentity)),
mManager(MediaManager::GetInstance()) {}
~GetUserMediaStreamRunnable() {
mHolder.RejectIfExists(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError), __func__);
}
class TracksCreatedListener : public MediaStreamTrackListener {
public:
TracksCreatedListener(
RefPtr<MediaManager> aManager,
MozPromiseHolder<MediaManager::StreamPromise>&& aHolder,
RefPtr<GetUserMediaWindowListener> aWindowListener, uint64_t aWindowID,
RefPtr<DOMMediaStream> aStream, RefPtr<MediaStreamTrack> aTrack,
RefPtr<GenericNonExclusivePromise>&& aFirstFramePromise)
: mWindowListener(std::move(aWindowListener)),
mHolder(std::move(aHolder)),
mManager(std::move(aManager)),
mWindowID(aWindowID),
mGraph(aTrack->GraphImpl()),
mStream(new nsMainThreadPtrHolder<DOMMediaStream>(
"TracksCreatedListener::mStream", aStream.forget())),
mTrack(new nsMainThreadPtrHolder<MediaStreamTrack>(
"TracksCreatedListener::mTrack", aTrack.forget())),
mFirstFramePromise(aFirstFramePromise) {}
~TracksCreatedListener() {
RejectIfExists(MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
// TODO: The need for this should be removed by an upcoming refactor.
void RejectIfExists(RefPtr<MediaMgrError>&& aError,
const char* aMethodName) {
mHolder.RejectIfExists(std::move(aError), aMethodName);
}
void NotifyOutput(MediaStreamGraph* aGraph,
StreamTime aCurrentTrackTime) override {
// It's enough to know that one of the tracks have output, as both tracks
// are guaranteed to be created in the graph at this point.
if (mDispatchedTracksCreated) {
return;
}
mDispatchedTracksCreated = true;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
"TracksCreatedListener::NotifyOutput Notifier",
[self = RefPtr<TracksCreatedListener>(this), this]() {
mTrack->RemoveListener(this);
if (!mManager->IsWindowListenerStillActive(mWindowListener)) {
return;
}
// This is safe since we're on main-thread, and the windowlist can
// only be invalidated from the main-thread (see OnNavigation)
if (!mFirstFramePromise) {
LOG("Returning success for getUserMedia()");
mHolder.Resolve(RefPtr<DOMMediaStream>(mStream), __func__);
return;
}
LOG("Deferring getUserMedia success to arrival of 1st frame");
mFirstFramePromise->Then(
GetMainThreadSerialEventTarget(), __func__,
[holder = std::move(mHolder), stream = mStream](
const GenericNonExclusivePromise::ResolveOrRejectValue&
aValue) mutable {
if (aValue.IsReject()) {
holder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError),
__func__);
} else {
LOG("Returning success for getUserMedia()!");
holder.Resolve(RefPtr<DOMMediaStream>(stream), __func__);
}
});
});
// DispatchToMainThreadStableState will make the runnable run
// in stable state. But since the runnable runs JS we need to make a
// double dispatch.
mGraph->DispatchToMainThreadStableState(NS_NewRunnableFunction(
"TracksCreatedListener::NotifyOutput Stable State Notifier",
[graph = mGraph, r = std::move(r)]() mutable {
graph->Dispatch(r.forget());
}));
}
void NotifyRemoved() override {
mGraph->Dispatch(NS_NewRunnableFunction(
"TracksCreatedListener::NotifyRemoved CycleBreaker",
[self = RefPtr<TracksCreatedListener>(this)]() {
self->mTrack->RemoveListener(self);
}));
}
const RefPtr<GetUserMediaWindowListener> mWindowListener;
MozPromiseHolder<MediaManager::StreamPromise> mHolder;
const RefPtr<MediaManager> mManager;
uint64_t mWindowID;
const RefPtr<MediaStreamGraphImpl> mGraph;
// Keep the DOMMediaStream alive until the success callback has been called,
// otherwise we might immediately destroy the DOMMediaStream and
// shut down the underlying MediaStream prematurely.
// This creates a cycle which is broken when we're destroyed, i.e., either
// when we've called the success callback and thus removed the listener from
// the graph, or on graph shutdown.
nsMainThreadPtrHandle<DOMMediaStream> mStream;
nsMainThreadPtrHandle<MediaStreamTrack> mTrack;
RefPtr<GenericNonExclusivePromise> mFirstFramePromise;
// Graph thread only.
bool mDispatchedTracksCreated = false;
};
NS_IMETHOD
Run() override {
MOZ_ASSERT(NS_IsMainThread());
LOG("GetUserMediaStreamRunnable::Run()");
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 NS_OK;
}
MediaStreamGraph::GraphDriverType graphDriverType =
mAudioDevice ? MediaStreamGraph::AUDIO_THREAD_DRIVER
: MediaStreamGraph::SYSTEM_THREAD_DRIVER;
MediaStreamGraph* msg = MediaStreamGraph::GetInstance(
graphDriverType, window, MediaStreamGraph::REQUEST_DEFAULT_SAMPLE_RATE);
RefPtr<DOMMediaStream> domStream;
RefPtr<SourceMediaStream> stream;
RefPtr<GenericNonExclusivePromise> firstFramePromise;
// AudioCapture is a special case, here, in the sense that we're not really
// using the audio source and the SourceMediaStream, which acts as
// placeholders. We re-route a number of stream internaly in the MSG and mix
// them down instead.
if (mAudioDevice &&
mAudioDevice->GetMediaSource() == MediaSourceEnum::AudioCapture) {
NS_WARNING(
"MediaCaptureWindowState doesn't handle "
"MediaSourceEnum::AudioCapture. This must be fixed with UX "
"before shipping.");
// It should be possible to pipe the capture stream to anything. CORS is
// not a problem here, we got explicit user content.
nsCOMPtr<nsIPrincipal> principal =
window->GetExtantDoc()->NodePrincipal();
domStream = DOMMediaStream::CreateAudioCaptureStreamAsInput(
window, principal, msg);
stream = msg->CreateSourceStream(); // Placeholder
msg->RegisterCaptureStreamForWindow(
mWindowID, domStream->GetInputStream()->AsProcessedStream());
window->SetAudioCapture(true);
} else {
class LocalTrackSource : public MediaStreamTrackSource {
public:
LocalTrackSource(nsIPrincipal* aPrincipal, const nsString& aLabel,
const RefPtr<SourceListener>& aListener,
MediaSourceEnum aSource, TrackID aTrackID,
RefPtr<PeerIdentity> aPeerIdentity)
: MediaStreamTrackSource(aPrincipal, aLabel),
mListener(aListener.get()),
mSource(aSource),
mTrackID(aTrackID),
mPeerIdentity(std::move(aPeerIdentity)) {}
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->ApplyConstraintsToTrack(mTrackID, aConstraints,
aCallerType);
}
void GetSettings(MediaTrackSettings& aOutSettings) override {
if (mListener) {
mListener->GetSettingsFor(mTrackID, aOutSettings);
}
}
void Stop() override {
if (mListener) {
mListener->StopTrack(mTrackID);
mListener = nullptr;
}
}
void Disable() override {
if (mListener) {
mListener->SetEnabledFor(mTrackID, false);
}
}
void Enable() override {
if (mListener) {
mListener->SetEnabledFor(mTrackID, true);
}
}
protected:
~LocalTrackSource() {}
// This is a weak pointer to avoid having the SourceListener (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<SourceListener> mListener;
const MediaSourceEnum mSource;
const TrackID mTrackID;
const RefPtr<const PeerIdentity> mPeerIdentity;
};
nsCOMPtr<nsIPrincipal> principal;
if (mPeerIdentity) {
principal = NullPrincipal::CreateWithInheritedAttributes(
window->GetExtantDoc()->NodePrincipal());
} else {
principal = window->GetExtantDoc()->NodePrincipal();
}
// Normal case, connect the source stream to the track union stream to
// avoid us blocking. Pass a simple TrackSourceGetter for potential
// fake tracks. Apart from them gUM never adds tracks dynamically.
domStream = DOMMediaStream::CreateSourceStreamAsInput(window, msg);
stream = domStream->GetInputStream()->AsSourceStream();
if (mAudioDevice) {
nsString audioDeviceName;
mAudioDevice->GetName(audioDeviceName);
const MediaSourceEnum source = mAudioDevice->GetMediaSource();
RefPtr<MediaStreamTrackSource> audioSource =
new LocalTrackSource(principal, audioDeviceName, mSourceListener,
source, kAudioTrack, mPeerIdentity);
MOZ_ASSERT(IsOn(mConstraints.mAudio));
RefPtr<MediaStreamTrack> track = domStream->CreateDOMTrack(
kAudioTrack, MediaSegment::AUDIO, audioSource,
GetInvariant(mConstraints.mAudio));
domStream->AddTrackInternal(track);
}
if (mVideoDevice) {
nsString videoDeviceName;
mVideoDevice->GetName(videoDeviceName);
const MediaSourceEnum source = mVideoDevice->GetMediaSource();
RefPtr<MediaStreamTrackSource> videoSource =
new LocalTrackSource(principal, videoDeviceName, mSourceListener,
source, kVideoTrack, mPeerIdentity);
MOZ_ASSERT(IsOn(mConstraints.mVideo));
RefPtr<MediaStreamTrack> track = domStream->CreateDOMTrack(
kVideoTrack, MediaSegment::VIDEO, videoSource,
GetInvariant(mConstraints.mVideo));
domStream->AddTrackInternal(track);
switch (source) {
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 || !stream || sHasShutdown) {
LOG("Returning error for getUserMedia() - no stream");
mHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError,
sHasShutdown ? NS_LITERAL_STRING("In shutdown")
: NS_LITERAL_STRING("No stream.")),
__func__);
return NS_OK;
}
// Activate our source listener. 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).
mWindowListener->Activate(mSourceListener, stream, mAudioDevice,
mVideoDevice);
nsTArray<RefPtr<MediaStreamTrack>> tracks(2);
domStream->GetTracks(tracks);
RefPtr<MediaStreamTrack> track = tracks[0];
auto tracksCreatedListener = MakeRefPtr<TracksCreatedListener>(
mManager, std::move(mHolder), mWindowListener, mWindowID, domStream,
track, std::move(firstFramePromise));
// Dispatch to the media thread to ask it to start the sources,
// because that can take a while.
// Pass ownership of domStream through the lambda to the nested chrome
// notification lambda to ensure it's kept alive until that lambda runs or
// is discarded.
mSourceListener->InitializeAsync()->Then(
GetMainThreadSerialEventTarget(), __func__,
[manager = mManager, windowListener = mWindowListener, track,
tracksCreatedListener]() {
LOG("GetUserMediaStreamRunnable::Run: starting success callback "
"following InitializeAsync()");
// Initiating and starting devices succeeded.
track->AddListener(tracksCreatedListener);
windowListener->ChromeAffectingStateChanged();
manager->SendPendingGUMRequest();
},
[manager = mManager, windowID = mWindowID,
tracksCreatedListener](RefPtr<MediaMgrError>&& aError) {
MOZ_ASSERT(NS_IsMainThread());
LOG("GetUserMediaStreamRunnable::Run: starting failure callback "
"following InitializeAsync()");
// Initiating and starting devices failed.
// Only run if the window is still active for our window listener.
if (!(manager->IsWindowStillActive(windowID))) {
return;
}
// This is safe since we're on main-thread, and the windowlist can
// only be invalidated from the main-thread (see OnNavigation)
tracksCreatedListener->RejectIfExists(std::move(aError), __func__);
});
if (!IsPincipalInfoPrivate(mPrincipalInfo)) {
// Call GetPrincipalKey again, this time w/persist = true, to promote
// deviceIds to persistent, in case they're not already. Fire'n'forget.
media::GetPrincipalKey(mPrincipalInfo, true)
->Then(GetCurrentThreadSerialEventTarget(), __func__,
[](const PrincipalKeyPromise::ResolveOrRejectValue& aValue) {
if (aValue.IsReject()) {
LOG("Failed get Principal key. Persisting of deviceIds "
"will be broken");
}
});
}
return NS_OK;
}
private:
MozPromiseHolder<MediaManager::StreamPromise> mHolder;
MediaStreamConstraints mConstraints;
RefPtr<MediaDevice> mAudioDevice;
RefPtr<MediaDevice> mVideoDevice;
uint64_t mWindowID;
RefPtr<GetUserMediaWindowListener> mWindowListener;
RefPtr<SourceListener> mSourceListener;
ipc::PrincipalInfo mPrincipalInfo;
RefPtr<PeerIdentity> mPeerIdentity;
RefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
// Source getter returning full list
static void GetMediaDevices(MediaEngine* aEngine, uint64_t aWindowId,
MediaSourceEnum aSrcType,
MediaManager::MediaDeviceSet& aResult,
const char* aMediaDeviceName = nullptr) {
MOZ_ASSERT(MediaManager::IsInMediaThread());
LOG("%s: aEngine=%p, aWindowId=%" PRIu64 ", aSrcType=%" PRIu8
", aMediaDeviceName=%s",
__func__, aEngine, aWindowId, static_cast<uint8_t>(aSrcType),
aMediaDeviceName ? aMediaDeviceName : "null");
nsTArray<RefPtr<MediaDevice>> devices;
aEngine->EnumerateDevices(aWindowId, 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 = devices;
if (MOZ_LOG_TEST(gMediaManagerLog, mozilla::LogLevel::Debug)) {
for (auto& device : devices) {
LOG("%s: appending device=%s", __func__,
NS_ConvertUTF16toUTF8(device->mName).get());
}
}
}
}
RefPtr<MediaManager::BadConstraintsPromise> MediaManager::SelectSettings(
const MediaStreamConstraints& aConstraints, bool aIsChrome,
const RefPtr<MediaDeviceSetRefCnt>& aSources) {
MOZ_ASSERT(NS_IsMainThread());
// Algorithm accesses device capabilities code and must run on media thread.
// Modifies passed-in aSources.
return MediaManager::PostTask<BadConstraintsPromise>(
__func__, [aConstraints, aSources, aIsChrome](
MozPromiseHolder<BadConstraintsPromise>& holder) mutable {
auto& sources = *aSources;
// 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& source : sources) {
MOZ_ASSERT(source->mKind == MediaDeviceKind::Videoinput ||
source->mKind == MediaDeviceKind::Audioinput);
if (source->mKind == MediaDeviceKind::Videoinput) {
videos.AppendElement(source);
} else if (source->mKind == MediaDeviceKind::Audioinput) {
audios.AppendElement(source);
}
}
sources.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,
aIsChrome);
}
if (!badConstraint && needAudio && audios.Length()) {
badConstraint = MediaConstraintsHelper::SelectSettings(
NormalizedConstraints(GetInvariant(aConstraints.mAudio)), audios,
aIsChrome);
}
if (!badConstraint && !needVideo == !videos.Length() &&
!needAudio == !audios.Length()) {
for (auto& video : videos) {
sources.AppendElement(video);
}
for (auto& audio : audios) {
sources.AppendElement(audio);
}
}
holder.Resolve(badConstraint, __func__);
});
}
/**
* Runs on a seperate thread and is responsible for enumerating devices.
* Depending on whether a picture or stream was asked for, either
* ProcessGetUserMedia is called, and the results are sent back to the DOM.
*
* Do not run this on the main thread. The success and error callbacks *MUST*
* be dispatched on the main thread!
*/
class GetUserMediaTask : public Runnable {
public:
GetUserMediaTask(const MediaStreamConstraints& aConstraints,
MozPromiseHolder<MediaManager::StreamPromise>&& aHolder,
uint64_t aWindowID,
RefPtr<GetUserMediaWindowListener> aWindowListener,
RefPtr<SourceListener> aSourceListener,
const MediaEnginePrefs& aPrefs,
const ipc::PrincipalInfo& aPrincipalInfo, bool aIsChrome,
RefPtr<MediaManager::MediaDeviceSetRefCnt>&& aMediaDeviceSet,
bool aShouldFocusSource)
: Runnable("GetUserMediaTask"),
mConstraints(aConstraints),
mHolder(std::move(aHolder)),
mWindowID(aWindowID),
mWindowListener(std::move(aWindowListener)),
mSourceListener(std::move(aSourceListener)),
mPrefs(aPrefs),
mPrincipalInfo(aPrincipalInfo),
mIsChrome(aIsChrome),
mShouldFocusSource(aShouldFocusSource),
mDeviceChosen(false),
mMediaDeviceSet(aMediaDeviceSet),
mManager(MediaManager::GetInstance()) {}
~GetUserMediaTask() {
if (!mHolder.IsEmpty()) {
Fail(MediaMgrError::Name::NotAllowedError);
}
}
void Fail(MediaMgrError::Name aName, const nsString& aMessage = EmptyString(),
const nsString& aConstraint = EmptyString()) {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"GetUserMediaTask::Fail",
[aName, aMessage, aConstraint, holder = std::move(mHolder)]() mutable {
holder.Reject(MakeRefPtr<MediaMgrError>(aName, aMessage, aConstraint),
__func__);
}));
// Do after the above runs, as it checks active window list
NS_DispatchToMainThread(NewRunnableMethod<RefPtr<SourceListener>>(
"GetUserMediaWindowListener::Remove", mWindowListener,
&GetUserMediaWindowListener::Remove, mSourceListener));
}
NS_IMETHOD
Run() override {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(mDeviceChosen);
LOG("GetUserMediaTask::Run()");
// Allocate a video or audio device and return a MediaStream via
// a GetUserMediaStreamRunnable.
nsresult rv;
const char* errorMsg = nullptr;
const char* badConstraint = nullptr;
if (mAudioDevice) {
auto& constraints = GetInvariant(mConstraints.mAudio);
rv = mAudioDevice->Allocate(constraints, mPrefs, mPrincipalInfo,
&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, mIsChrome);
}
}
}
if (!errorMsg && mVideoDevice) {
auto& constraints = GetInvariant(mConstraints.mVideo);
rv = mVideoDevice->Allocate(constraints, mPrefs, mPrincipalInfo,
&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, mIsChrome);
}
if (mAudioDevice) {
mAudioDevice->Deallocate();
}
} else {
if (!mIsChrome) {
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_LITERAL_STRING(""),
NS_ConvertUTF8toUTF16(badConstraint));
} else {
Fail(MediaMgrError::Name::NotReadableError,
NS_ConvertUTF8toUTF16(errorMsg));
}
NS_DispatchToMainThread(
NS_NewRunnableFunction("MediaManager::SendPendingGUMRequest", []() {
MediaManager* manager = MediaManager::GetIfExists();
if (!manager) {
return;
}
manager->SendPendingGUMRequest();
}));
return NS_OK;
}
PeerIdentity* peerIdentity = nullptr;
if (!mConstraints.mPeerIdentity.IsEmpty()) {
peerIdentity = new PeerIdentity(mConstraints.mPeerIdentity);
}
NS_DispatchToMainThread(do_AddRef(new GetUserMediaStreamRunnable(
std::move(mHolder), mWindowID, mWindowListener, mSourceListener,
mPrincipalInfo, mConstraints, mAudioDevice, mVideoDevice, peerIdentity,
mIsChrome)));
return NS_OK;
}
nsresult Denied(MediaMgrError::Name aName,
const nsString& aMessage = EmptyString()) {
// We add a disabled listener to the StreamListeners array until accepted
// If this was the only active MediaStream, remove the window from the list.
if (NS_IsMainThread()) {
mHolder.Reject(MakeRefPtr<MediaMgrError>(aName, aMessage), __func__);
// Should happen *after* error runs for consistency, but may not matter
mWindowListener->Remove(mSourceListener);
} else {
// This will re-check the window being alive on main-thread
Fail(aName, aMessage);
}
return NS_OK;
}
nsresult SetContraints(const MediaStreamConstraints& aConstraints) {
mConstraints = aConstraints;
return NS_OK;
}
const MediaStreamConstraints& GetConstraints() { return mConstraints; }
nsresult SetAudioDevice(RefPtr<MediaDevice> aAudioDevice) {
mAudioDevice = std::move(aAudioDevice);
mDeviceChosen = true;
return NS_OK;
}
nsresult SetVideoDevice(RefPtr<MediaDevice> aVideoDevice) {
mVideoDevice = std::move(aVideoDevice);
mDeviceChosen = true;
return NS_OK;
}
uint64_t GetWindowID() { return mWindowID; }
private:
MediaStreamConstraints mConstraints;
MozPromiseHolder<MediaManager::StreamPromise> mHolder;
uint64_t mWindowID;
RefPtr<GetUserMediaWindowListener> mWindowListener;
RefPtr<SourceListener> mSourceListener;
RefPtr<MediaDevice> mAudioDevice;
RefPtr<MediaDevice> mVideoDevice;
const MediaEnginePrefs mPrefs;
ipc::PrincipalInfo mPrincipalInfo;
bool mIsChrome;
bool mShouldFocusSource;
bool mDeviceChosen;
public:
RefPtr<MediaManager::MediaDeviceSetRefCnt> mMediaDeviceSet;
private:
RefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
#if defined(ANDROID)
class GetUserMediaRunnableWrapper : public Runnable {
public:
// This object must take ownership of task
explicit GetUserMediaRunnableWrapper(GetUserMediaTask* task)
: Runnable("GetUserMediaRunnableWrapper"), mTask(task) {}
~GetUserMediaRunnableWrapper() {}
NS_IMETHOD Run() override {
mTask->Run();
return NS_OK;
}
private:
nsAutoPtr<GetUserMediaTask> mTask;
};
#endif
// This function tries to guess the group id for a video device
// based on the device name. If only one audio device's name contains
// the name of the video device, then, this video device will take
// the group id of the audio device. Since this is a guess we try
// to minimize the probability of false positive. If we fail to find
// a correlation we leave the video group id untouched. In that case the
// group id will be the video device name.
/* static */
void MediaManager::GuessVideoDeviceGroupIDs(MediaDeviceSet& aDevices) {
// 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 : aDevices) {
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 = NS_LITERAL_STRING("");
break;
}
}
if (updateGroupId) {
aVideo =
new MediaDevice(aVideo, aVideo->mID, newVideoGroupID, aVideo->mRawID);
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(
uint64_t aWindowId, 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: aWindowId=%" PRIu64 ", aVideoInputType=%" PRIu8
", aAudioInputType=%" PRIu8 ", aVideoInputEnumType=%" PRIu8
", aAudioInputEnumType=%" PRIu8,
__func__, aWindowId, static_cast<uint8_t>(aVideoInputType),
static_cast<uint8_t>(aAudioInputType),
static_cast<uint8_t>(aVideoInputEnumType),
static_cast<uint8_t>(aAudioInputEnumType));
auto holder = MakeUnique<MozPromiseHolder<MgrPromise>>();
RefPtr<MgrPromise> promise = holder->Ensure(__func__);
bool hasVideo = aVideoInputType != MediaSourceEnum::Other;
bool hasAudio = aAudioInputType != MediaSourceEnum::Other;
bool hasAudioOutput = aAudioOutputType == MediaSinkEnum::Speaker;
// True of at least one of video input or audio input is a fake device
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.
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), aWindowId,
aVideoInputType, aAudioInputType,
aVideoInputEnumType, aAudioInputEnumType,
videoLoopDev, audioLoopDev, hasVideo,
hasAudio, hasAudioOutput,
fakeDeviceRequested, realDeviceRequested,
aOutDevices]() {
// 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();
}
if (hasVideo) {
MediaDeviceSet videos;
LOG("EnumerateRawDevices Task: Getting video sources with %s backend",
aVideoInputEnumType == DeviceEnumerationType::Fake ? "fake" : "real");
GetMediaDevices(aVideoInputEnumType == DeviceEnumerationType::Fake
? fakeBackend
: realBackend,
aWindowId, aVideoInputType, videos, videoLoopDev.get());
aOutDevices->AppendElements(videos);
}
if (hasAudio) {
MediaDeviceSet audios;
LOG("EnumerateRawDevices Task: Getting audio sources with %s backend",
aAudioInputEnumType == DeviceEnumerationType::Fake ? "fake" : "real");
GetMediaDevices(aAudioInputEnumType == DeviceEnumerationType::Fake
? fakeBackend
: realBackend,
aWindowId, aAudioInputType, audios, audioLoopDev.get());
aOutDevices->AppendElements(audios);
}
if (hasAudioOutput) {
MediaDeviceSet outputs;
MOZ_ASSERT(realBackend);
realBackend->EnumerateDevices(aWindowId, MediaSourceEnum::Other,
MediaSinkEnum::Speaker, &outputs);
aOutDevices->AppendElements(outputs);
}
if (hasVideo) {
GuessVideoDeviceGroupIDs(*aOutDevices);
}
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::PostTask(task.forget());
}
return promise;
}
MediaManager::MediaManager() : mMediaThread(nullptr), 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.mNoiseOn = false;
mPrefs.mExtendedFilter = true;
mPrefs.mDelayAgnostic = true;
mPrefs.mFakeDeviceChangeEventOn = false;
#ifdef MOZ_WEBRTC
mPrefs.mAec =
webrtc::EchoCancellation::SuppressionLevel::kModerateSuppression;
mPrefs.mAgc = webrtc::GainControl::Mode::kAdaptiveDigital;
mPrefs.mNoise = webrtc::NoiseSuppression::Level::kModerate;
#else
mPrefs.mAec = 0;
mPrefs.mAgc = 0;
mPrefs.mNoise = 0;
#endif
mPrefs.mFullDuplex = false;
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, noise: %s, aec level: %d, agc level: %d, noise level: %d,"
"%sfull_duplex, extended aec %s, delay_agnostic %s "
"channels %d",
__FUNCTION__, mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mFreq,
mPrefs.mAecOn ? "on" : "off", mPrefs.mAgcOn ? "on" : "off",
mPrefs.mNoiseOn ? "on" : "off", mPrefs.mAec, mPrefs.mAgc, mPrefs.mNoise,
mPrefs.mFullDuplex ? "" : "not ", mPrefs.mExtendedFilter ? "on" : "off",
mPrefs.mDelayAgnostic ? "on" : "off", mPrefs.mChannels);
}
NS_IMPL_ISUPPORTS(MediaManager, nsIMediaManagerService, nsIObserver)
/* static */
StaticRefPtr<MediaManager> MediaManager::sSingleton;
#ifdef DEBUG
/* static */
bool MediaManager::IsInMediaThread() {
return sSingleton ? (sSingleton->mMediaThread->thread_id() ==
PlatformThread::CurrentId())
: false;
}
#endif
#ifdef XP_WIN
class MTAThread : public base::Thread {
public:
explicit MTAThread(const char* aName)
: base::Thread(aName), mResult(E_FAIL) {}
protected:
virtual void Init() override {
mResult = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
}
virtual void CleanUp() override {
if (SUCCEEDED(mResult)) {
CoUninitialize();
}
}
private:
HRESULT mResult;
};
#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() {
if (!sSingleton) {
MOZ_ASSERT(NS_IsMainThread());
static int timesCreated = 0;
timesCreated++;
MOZ_RELEASE_ASSERT(timesCreated == 1);
sSingleton = new MediaManager();
#ifdef XP_WIN
sSingleton->mMediaThread = new MTAThread("MediaManager");
#else
sSingleton->mMediaThread = new base::Thread("MediaManager");
#endif
base::Thread::Options options;
options.message_loop_type = MessageLoop::TYPE_MOZILLA_NONMAINTHREAD;
if (!sSingleton->mMediaThread->StartWithOptions(options)) {
MOZ_CRASH();
}
LOG("New Media thread for gum");
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);
}
// 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);
prefs->AddObserver("media.navigator.audio.full_duplex", 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.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
}
// Prepare async shutdown
class Blocker : public media::ShutdownBlocker {
public:
Blocker()
: media::ShutdownBlocker(
NS_LITERAL_STRING("Media shutdown: blocking on media thread")) {
}
NS_IMETHOD BlockShutdown(nsIAsyncShutdownClient*) override {
MOZ_RELEASE_ASSERT(MediaManager::GetIfExists());
MediaManager::GetIfExists()->Shutdown();
return NS_OK;
}
};
sSingleton->mShutdownBlocker = new Blocker();
nsresult rv = media::GetShutdownBarrier()->AddBlocker(
sSingleton->mShutdownBlocker, NS_LITERAL_STRING(__FILE__), __LINE__,
NS_LITERAL_STRING(""));
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
return sSingleton;
}
/* static */
MediaManager* MediaManager::GetIfExists() { 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::PostTask(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");
Get()->mMediaThread->message_loop()->PostTask(std::move(task));
}
template <typename MozPromiseType, typename FunctionType>
/* static */
RefPtr<MozPromiseType> MediaManager::PostTask(const char* aName,
FunctionType&& aFunction) {
MozPromiseHolder<MozPromiseType> holder;
RefPtr<MozPromiseType> promise = holder.Ensure(aName);
MediaManager::PostTask(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(NS_LITERAL_STRING("requestURL"), requestURL);
obs->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
"recording-device-events", nullptr);
LOG("Sent recording-device-events for url '%s'", pageURL.get());
return NS_OK;
}
int MediaManager::AddDeviceChangeCallback(DeviceChangeCallback* aCallback) {
bool fakeDeviceChangeEventOn = mPrefs.mFakeDeviceChangeEventOn;
MediaManager::PostTask(NewTaskFrom([fakeDeviceChangeEventOn]() {
MediaManager* manager = MediaManager::GetIfExists();
MOZ_RELEASE_ASSERT(manager); // Must exist while media thread is alive
// this is needed in case persistent permission is given but no gUM()
// or enumeration() has created the real backend yet
manager->GetBackend();
if (fakeDeviceChangeEventOn)
manager->GetBackend()->SetFakeDeviceChangeEvents();
}));
return DeviceChangeCallback::AddDeviceChangeCallback(aCallback);
}
void MediaManager::OnDeviceChange() {
NS_DispatchToMainThread(NS_NewRunnableFunction(
"MediaManager::OnDeviceChange", [self = RefPtr<MediaManager>(this)]() {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown) {
return;
}
self->DeviceChangeCallback::OnDeviceChange();
// On some Windows machine, if we call EnumerateRawDevices immediately
// after receiving devicechange event, sometimes we would get outdated
// devices list.
PR_Sleep(PR_MillisecondsToInterval(200));
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
self->EnumerateRawDevices(
0, MediaSourceEnum::Camera, MediaSourceEnum::Microphone,
MediaSinkEnum::Speaker, DeviceEnumerationType::Normal,
DeviceEnumerationType::Normal, false, devices)
->Then(
GetCurrentThreadSerialEventTarget(), __func__,
[self, devices](bool) {
if (!MediaManager::GetIfExists()) {
return;
}
nsTArray<nsString> deviceIDs;
for (auto& device : *devices) {
nsString id;
device->GetId(id);
id.ReplaceSubstring(NS_LITERAL_STRING("default: "),
NS_LITERAL_STRING(""));
if (!deviceIDs.Contains(id)) {
deviceIDs.AppendElement(id);
}
}
for (auto& id : self->mDeviceIDs) {
if (deviceIDs.Contains(id)) {
continue;
}
// Stop the coresponding SourceListener
nsGlobalWindowInner::InnerWindowByIdTable* windowsById =
nsGlobalWindowInner::GetWindowsTable();
if (!windowsById) {
continue;
}
for (auto iter = windowsById->Iter(); !iter.Done();
iter.Next()) {
nsGlobalWindowInner* window = iter.Data();
self->IterateWindowListeners(
window,
[&id](const RefPtr<GetUserMediaWindowListener>&
aListener) { aListener->StopRawID(id); });
}
}
self->mDeviceIDs = deviceIDs;
},
[](RefPtr<MediaMgrError>&& reason) {});
}));
}
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;
}
static bool IsFullyActive(nsPIDOMWindowInner* aWindow) {
while (true) {
if (!aWindow) {
return false;
}
Document* document = aWindow->GetExtantDoc();
if (!document) {
return false;
}
if (!document->IsCurrentActiveDocument()) {
return false;
}
nsPIDOMWindowOuter* context = aWindow->GetOuterWindow();
if (!context) {
return false;
}
if (context->IsTopLevelWindow()) {
return true;
}
nsCOMPtr<Element> frameElement =
nsGlobalWindowOuter::Cast(context)->GetRealFrameElementOuter();
if (!frameElement) {
return false;
}
aWindow = frameElement->OwnerDoc()->GetInnerWindow();
}
}
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 (!IsOn(aConstraint)) {
return;
}
// It looks like {audio: true}, do nothing.
if (!aConstraint.IsMediaTrackConstraints()) {
return;
}
// Keep mediaSource, ignore all other constraints.
auto& c = aConstraint.GetAsMediaTrackConstraints();
nsString mediaSource = c.mMediaSource;
aConstraint.SetAsMediaTrackConstraints().mMediaSource = mediaSource;
}
/**
* 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
// Do all the validation we can while we're sync (to return an
// already-rejected promise on failure).
if (!IsOn(c.mVideo) && !IsOn(c.mAudio)) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::TypeError,
NS_LITERAL_STRING("audio and/or video is required")),
__func__);
}
if (!IsFullyActive(aWindow)) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::InvalidStateError),
__func__);
}
if (sHasShutdown) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
NS_LITERAL_STRING("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();
// Note: isHTTPS is for legacy telemetry only! Use isSecure for security, as
// it handles things like https iframes in http pages correctly.
bool isHTTPS = false;
bool isHandlingUserInput = EventStateManager::IsHandlingUserInput();
docURI->SchemeIs("https", &isHTTPS);
nsCString host;
nsresult rv = docURI->GetHost(host);
// Test for some other schemes that ServiceWorker recognizes
bool isFile;
docURI->SchemeIs("file", &isFile);
bool isApp;
docURI->SchemeIs("app", &isApp);
// Same localhost check as ServiceWorkers uses
// (see IsOriginPotentiallyTrustworthy())
bool isLocalhost =
NS_SUCCEEDED(rv) && (host.LowerCaseEqualsLiteral("localhost") ||
host.LowerCaseEqualsLiteral("127.0.0.1") ||
host.LowerCaseEqualsLiteral("::1"));
// Record telemetry about whether the source of the call was secure, i.e.,
// privileged or HTTPS. We may handle other cases
if (privileged) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::Privileged);
} else if (isHTTPS) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::HTTPS);
} else if (isFile) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::File);
} else if (isApp) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::App);
} else if (isLocalhost) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::Localhost);
} else {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t)GetUserMediaSecurityState::Other);
}
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();
videoType = StringToEnum(dom::MediaSourceEnumValues::strings,
vc.mMediaSource, 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());
}
MOZ_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,
NS_LITERAL_STRING(""),
NS_LITERAL_STRING("mediaSource")),
__func__);
}
}
if (vc.mAdvanced.WasPassed() && videoType != MediaSourceEnum::Camera) {
// iterate through advanced, forcing all unset mediaSources to match
// "root"
const char* unset = EnumToASCII(dom::MediaSourceEnumValues::strings,
MediaSourceEnum::Camera);
for (MediaTrackConstraintSet& cs : vc.mAdvanced.Value()) {
if (cs.mMediaSource.EqualsASCII(unset)) {
cs.mMediaSource = vc.mMediaSource;
}
}
}
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.AssignASCII(
EnumToASCII(dom::MediaSourceEnumValues::strings, 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();
audioType = StringToEnum(dom::MediaSourceEnumValues::strings,
ac.mMediaSource, MediaSourceEnum::Other);
// Work around WebIDL default since spec uses same dictionary w/audio &
// video.
if (audioType == MediaSourceEnum::Camera) {
audioType = MediaSourceEnum::Microphone;
ac.mMediaSource.AssignASCII(
EnumToASCII(dom::MediaSourceEnumValues::strings, audioType));
}
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,
NS_LITERAL_STRING(""),
NS_LITERAL_STRING("mediaSource")),
__func__);
}
}
if (ac.mAdvanced.WasPassed()) {
// iterate through advanced, forcing all unset mediaSources to match
// "root"
const char* unset = EnumToASCII(dom::MediaSourceEnumValues::strings,
MediaSourceEnum::Camera);
for (MediaTrackConstraintSet& cs : ac.mAdvanced.Value()) {
if (cs.mMediaSource.EqualsASCII(unset)) {
cs.mMediaSource = ac.mMediaSource;
}
}
}
} 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 =
GetWindowListener(windowID);
if (windowListener) {
PrincipalHandle existingPrincipalHandle =
windowListener->GetPrincipalHandle();
MOZ_ASSERT(PrincipalHandleMatches(existingPrincipalHandle, principal));
} else {
windowListener = new GetUserMediaWindowListener(
mMediaThread, windowID, MakePrincipalHandle(principal));
AddWindowID(windowID, windowListener);
}
auto sourceListener = MakeRefPtr<SourceListener>();
windowListener->Register(sourceListener);
if (!privileged) {
// Check if this site has had persistent permissions denied.
nsCOMPtr<nsIPermissionManager> permManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
uint32_t audioPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mAudio)) {
if (audioType == MediaSourceEnum::Microphone) {
if (Preferences::GetBool("media.getusermedia.microphone.deny", false) ||
!FeaturePolicyUtils::IsFeatureAllowed(
doc, NS_LITERAL_STRING("microphone"))) {
audioPerm = nsIPermissionManager::DENY_ACTION;
} else {
rv = permManager->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("microphone"), &audioPerm);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
} else {
if (!FeaturePolicyUtils::IsFeatureAllowed(
doc, NS_LITERAL_STRING("display-capture"))) {
audioPerm = nsIPermissionManager::DENY_ACTION;
} else {
rv = permManager->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("screen"), &audioPerm);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
}
}
uint32_t videoPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mVideo)) {
if (videoType == MediaSourceEnum::Camera) {
if (Preferences::GetBool("media.getusermedia.camera.deny", false) ||
!FeaturePolicyUtils::IsFeatureAllowed(
doc, NS_LITERAL_STRING("camera"))) {
videoPerm = nsIPermissionManager::DENY_ACTION;
} else {
rv = permManager->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("camera"), &videoPerm);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
} else {
if (!FeaturePolicyUtils::IsFeatureAllowed(
doc, NS_LITERAL_STRING("display-capture"))) {
videoPerm = nsIPermissionManager::DENY_ACTION;
} else {
rv = permManager->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("screen"), &videoPerm);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
}
}
if ((!IsOn(c.mAudio) && !IsOn(c.mVideo)) ||
(IsOn(c.mAudio) && audioPerm == nsIPermissionManager::DENY_ACTION) ||
(IsOn(c.mVideo) && videoPerm == nsIPermissionManager::DENY_ACTION)) {
windowListener->Remove(sourceListener);
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(windowID, videoType, audioType,
MediaSinkEnum::Other, videoEnumerationType,
audioEnumerationType, true, devices)
->Then(
GetCurrentThreadSerialEventTarget(), __func__,
[self, windowID, c, windowListener, isChrome, 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, isChrome, devices);
},
[](RefPtr<MediaMgrError>&& aError) {
LOG("GetUserMedia: post enumeration EnumerateDevicesImpl "
"failure callback called!");
return BadConstraintsPromise::CreateAndReject(std::move(aError),
__func__);
})
->Then(
GetCurrentThreadSerialEventTarget(), __func__,
[self, windowID, c, windowListener, sourceListener, askPermission,
prefs, isSecure, isHandlingUserInput, callID, principalInfo,
isChrome, 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);
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);
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::OverconstrainedError,
NS_LITERAL_STRING(""), constraint),
__func__);
}
if (!devices->Length()) {
LOG("GetUserMedia: no devices found in post enumeration promise2 "
"success callback! Calling error handler!");
// 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__);
}
// before we give up devices below
nsCOMPtr<nsIMutableArray> devicesCopy = nsArray::Create();
if (!askPermission) {
for (auto& device : *devices) {
nsresult rv = devicesCopy->AppendElement(device);
if (NS_WARN_IF(NS_FAILED(rv))) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError),
__func__);
}
}
}
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.
auto holder = MozPromiseHolder<StreamPromise>();
RefPtr<StreamPromise> p = holder.Ensure(__func__);
// Pass callbacks and listeners along to GetUserMediaTask.
auto task = MakeRefPtr<GetUserMediaTask>(
c, std::move(holder), windowID, windowListener, sourceListener,
prefs, principalInfo, isChrome, std::move(devices),
focusSource);
// Store the task w/callbacks.
self->mActiveCallbacks.Put(callID, task.forget());
// Add a WindowID cross-reference so OnNavigation can tear
// things down
nsTArray<nsString>* array;
if (!self->mCallIds.Get(windowID, &array)) {
array = new nsTArray<nsString>();
self->mCallIds.Put(windowID, array);
}
array->AppendElement(callID);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!askPermission) {
obs->NotifyObservers(devicesCopy, "getUserMedia:privileged:allow",
callID.BeginReading());
} else {
auto req = MakeRefPtr<GetUserMediaRequest>(
window, callID, c, isSecure, isHandlingUserInput);
if (!Preferences::GetBool("media.navigator.permission.force") &&
array->Length() > 1) {
// there is at least 1 pending gUM request
// For the scarySources test case, always send the
// request
self->mPendingGUMRequest.AppendElement(req.forget());
} else {
obs->NotifyObservers(req, "getUserMedia:request", nullptr);
}
}
#ifdef MOZ_WEBRTC
EnableWebRtcLog();
#endif
return p;
},
[](RefPtr<MediaMgrError>&& aError) {
LOG("GetUserMedia: post enumeration SelectSettings failure "
"callback called!");
return StreamPromise::CreateAndReject(std::move(aError), __func__);
});
};
RefPtr<MediaManager::StreamPromise> MediaManager::GetDisplayMedia(
nsPIDOMWindowInner* aWindow,
const DisplayMediaStreamConstraints& aConstraintsPassedIn,
CallerType aCallerType) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aWindow);
if (!IsOn(aConstraintsPassedIn.mVideo)) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::TypeError,
NS_LITERAL_STRING("video is required")),
__func__);
}
MediaStreamConstraints c;
auto& vc = c.mVideo.SetAsMediaTrackConstraints();
if (aConstraintsPassedIn.mVideo.IsMediaTrackConstraints()) {
vc = aConstraintsPassedIn.mVideo.GetAsMediaTrackConstraints();
if (vc.mAdvanced.WasPassed()) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::TypeError,
NS_LITERAL_STRING("advanced not allowed")),
__func__);
}
auto getCLR = [](const auto& aCon) -> const ConstrainLongRange& {
static ConstrainLongRange empty;
return (aCon.WasPassed() && !aCon.Value().IsLong())
? aCon.Value().GetAsConstrainLongRange()
: empty;
};
auto getCDR = [](auto&& aCon) -> const ConstrainDoubleRange& {
static ConstrainDoubleRange empty;
return (aCon.WasPassed() && !aCon.Value().IsDouble())
? aCon.Value().GetAsConstrainDoubleRange()
: empty;
};
const auto& w = getCLR(vc.mWidth);
const auto& h = getCLR(vc.mHeight);
const auto& f = getCDR(vc.mFrameRate);
if (w.mMin.WasPassed() || h.mMin.WasPassed() || f.mMin.WasPassed()) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::TypeError,
NS_LITERAL_STRING("min not allowed")),
__func__);
}
if (w.mExact.WasPassed() || h.mExact.WasPassed() || f.mExact.WasPassed()) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::TypeError,
NS_LITERAL_STRING("exact not allowed")),
__func__);
}
// As a UA optimization, we fail early without incurring a prompt, on
// known-to-fail constraint values that don't reveal anything about the
// user's system.
const char* badConstraint = nullptr;
if (w.mMax.WasPassed() && w.mMax.Value() < 1) {
badConstraint = "width";
}
if (h.mMax.WasPassed() && h.mMax.Value() < 1) {
badConstraint = "height";
}
if (f.mMax.WasPassed() && f.mMax.Value() < 1) {
badConstraint = "frameRate";
}
if (badConstraint) {
return StreamPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::OverconstrainedError,
NS_LITERAL_STRING(""),
NS_ConvertASCIItoUTF16(badConstraint)),
__func__);
}
}
// We ask for "screen" sharing.
//
// If this is a privileged call or permission is disabled, this gives us full
// screen sharing by default, which is useful for internal testing.
//
// If this is a non-priviliged call, GetUserMedia() will change it to "window"
// for us.
vc.mMediaSource.AssignASCII(EnumToASCII(dom::MediaSourceEnumValues::strings,
MediaSourceEnum::Screen));
return MediaManager::GetUserMedia(aWindow, c, aCallerType);
}
/* 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);
// 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);
device = new MediaDevice(device, id, groupId, rawId);
}
}
}
/* 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;
}
aId = NS_ConvertUTF8toUTF16(mac);
return NS_OK;
}
/* static */
already_AddRefed<nsIWritableVariant> MediaManager::ToJSArray(
MediaDeviceSet& aDevices) {
MOZ_ASSERT(NS_IsMainThread());
auto var = MakeRefPtr<nsVariantCC>();
size_t len = aDevices.Length();
if (len) {
nsTArray<nsIMediaDevice*> tmp(len);
for (auto& device : aDevices) {
tmp.AppendElement(device);
}
auto* elements = static_cast<const void*>(tmp.Elements());
nsresult rv = var->SetAsArray(nsIDataType::VTYPE_INTERFACE,
&NS_GET_IID(nsIMediaDevice), len,
const_cast<void*>(elements));
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
} else {
var->SetAsEmptyArray(); // because SetAsArray() fails on zero length
// arrays.
}
return var.forget();
}
RefPtr<MediaManager::MgrPromise> MediaManager::EnumerateDevicesImpl(
uint64_t aWindowId, MediaSourceEnum aVideoInputType,
MediaSourceEnum aAudioInputType, MediaSinkEnum aAudioOutputType,
DeviceEnumerationType aVideoInputEnumType,
DeviceEnumerationType aAudioInputEnumType, bool aForceNoPermRequest,
const RefPtr<MediaDeviceSetRefCnt>& aOutDevices) {
MOZ_ASSERT(NS_IsMainThread());
LOG("%s: aWindowId=%" PRIu64 ", aVideoInputType=%" PRIu8
", aAudioInputType=%" PRIu8 ", aVideoInputEnumType=%" PRIu8
", aAudioInputEnumType=%" PRIu8,
__func__, aWindowId, static_cast<uint8_t>(aVideoInputType),
static_cast<uint8_t>(aAudioInputType),
static_cast<uint8_t>(aVideoInputEnumType),
static_cast<uint8_t>(aAudioInputEnumType));
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowId);
// 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(window)->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__);
}
bool persist = IsActivelyCapturingOrHasAPermission(aWindowId);
// 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__,
[aWindowId, 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(aWindowId)) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
return mgr->EnumerateRawDevices(
aWindowId, 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__,
[aWindowId, originKey, aVideoInputEnumType, aAudioInputEnumType,
aVideoInputType, aAudioInputType, aOutDevices](bool) {
// Only run if window is still on our active list.
MediaManager* mgr = MediaManager::GetIfExists();
if (!mgr || !mgr->IsWindowStillActive(aWindowId)) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
// If we fetched any real cameras or mics, remove the
// "default" part of their IDs.
if (aVideoInputType == MediaSourceEnum::Camera &&
aAudioInputType == MediaSourceEnum::Microphone &&
(aVideoInputEnumType != DeviceEnumerationType::Fake ||
aAudioInputEnumType != DeviceEnumerationType::Fake)) {
mgr->mDeviceIDs.Clear();
for (auto& device : *aOutDevices) {
nsString id;
device->GetId(id);
id.ReplaceSubstring(NS_LITERAL_STRING("default: "),
NS_LITERAL_STRING(""));
if (!mgr->mDeviceIDs.Contains(id)) {
mgr->mDeviceIDs.AppendElement(id);
}
}
}
if (!mgr->IsWindowStillActive(aWindowId)) {
return MgrPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError),
__func__);
}
MediaManager::AnonymizeDevices(*aOutDevices, *originKey, aWindowId);
return MgrPromise::CreateAndResolve(false, __func__);
},
[](RefPtr<MediaMgrError>&& aError) {
return MgrPromise::CreateAndReject(std::move(aError), __func__);
});
}
RefPtr<MediaManager::DevicesPromise> MediaManager::EnumerateDevices(
nsPIDOMWindowInner* aWindow, CallerType aCallerType) {
MOZ_ASSERT(NS_IsMainThread());
if (sHasShutdown) {
return DevicesPromise::CreateAndReject(
MakeRefPtr<MediaMgrError>(MediaMgrError::Name::AbortError,
NS_LITERAL_STRING("In shutdown")),
__func__);
}
uint64_t windowId = aWindow->WindowID();
nsIPrincipal* principal = aWindow->GetExtantDoc()->NodePrincipal();
RefPtr<GetUserMediaWindowListener> windowListener =
GetWindowListener(windowId);
if (windowListener) {
PrincipalHandle existingPrincipalHandle =
windowListener->GetPrincipalHandle();
MOZ_ASSERT(PrincipalHandleMatches(existingPrincipalHandle, principal));
} else {
windowListener = new GetUserMediaWindowListener(
mMediaThread, windowId, MakePrincipalHandle(principal));
AddWindowID(windowId, windowListener);
}
// Create an inactive SourceListener to act as a placeholder, so the
// window listener doesn't clean itself up until we're done.
auto sourceListener = MakeRefPtr<SourceListener>();
windowListener->Register(sourceListener);
DeviceEnumerationType videoEnumerationType = DeviceEnumerationType::Normal;
DeviceEnumerationType audioEnumerationType = DeviceEnumerationType::Normal;
bool resistFingerprinting = nsContentUtils::ResistFingerprinting(aCallerType);
// 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
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
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;
}
}
MediaSinkEnum audioOutputType = MediaSinkEnum::Other;
if (Preferences::GetBool("media.setsinkid.enabled")) {
audioOutputType = MediaSinkEnum::Speaker;
}
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
return EnumerateDevicesImpl(windowId, MediaSourceEnum::Camera,
MediaSourceEnum::Microphone, audioOutputType,
videoEnumerationType, audioEnumerationType, false,
devices)
->Then(
GetCurrentThreadSerialEventTarget(), __func__,
[windowListener, sourceListener, devices](bool) {
DebugOnly<bool> rv = windowListener->Remove(sourceListener);
MOZ_ASSERT(rv);
return DevicesPromise::CreateAndResolve(devices, __func__);
},
[windowListener, sourceListener](RefPtr<MediaMgrError>&& aError) {
// This may fail, if a new doc has been set the OnNavigation
// method should have removed all previous active listeners.
// Attempt to clean it here, just in case, but ignore the return
// value.
Unused << windowListener->Remove(sourceListener);
return DevicesPromise::CreateAndReject(std::move(aError), __func__);
});
}
RefPtr<SinkInfoPromise> MediaManager::GetSinkDevice(nsPIDOMWindowInner* aWindow,
const nsString& aDeviceId) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aWindow);
// We have to add the window id here because enumerate methods
// check for that and abort silently if it does not exist.
uint64_t windowId = aWindow->WindowID();
nsIPrincipal* principal = aWindow->GetExtantDoc()->NodePrincipal();
RefPtr<GetUserMediaWindowListener> windowListener =
GetWindowListener(windowId);
if (windowListener) {
PrincipalHandle existingPrincipalHandle =
windowListener->GetPrincipalHandle();
MOZ_ASSERT(PrincipalHandleMatches(existingPrincipalHandle, principal));
} else {
windowListener = new GetUserMediaWindowListener(
mMediaThread, windowId, MakePrincipalHandle(principal));
AddWindowID(windowId, windowListener);
}
// Create an inactive SourceListener to act as a placeholder, so the
// window listener doesn't clean itself up until we're done.
auto sourceListener = MakeRefPtr<SourceListener>();
windowListener->Register(sourceListener);
bool isSecure = aWindow->IsSecureContext();
auto devices = MakeRefPtr<MediaDeviceSetRefCnt>();
return EnumerateDevicesImpl(aWindow->WindowID(), MediaSourceEnum::Other,
MediaSourceEnum::Other, MediaSinkEnum::Speaker,
DeviceEnumerationType::Normal,
DeviceEnumerationType::Normal, true, devices)
->Then(
GetCurrentThreadSerialEventTarget(), __func__,
[aDeviceId, isSecure, devices](bool) {
for (RefPtr<MediaDevice>& device : *devices) {
if (aDeviceId.IsEmpty() && device->mSinkInfo->Preferred()) {
return SinkInfoPromise::CreateAndResolve(device->mSinkInfo,
__func__);
}
if (device->mID.Equals(aDeviceId)) {
// TODO: Check if the application is authorized to play audio
// through this device (Bug 1493982).
if (isSecure || device->mSinkInfo->Preferred()) {
return SinkInfoPromise::CreateAndResolve(device->mSinkInfo,
__func__);
}
return SinkInfoPromise::CreateAndReject(
NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR, __func__);
}
}
return SinkInfoPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE,
__func__);
},
[](RefPtr<MediaMgrError>&& aError) {
return SinkInfoPromise::CreateAndReject(NS_ERROR_NOT_AVAILABLE,
__func__);
});
}
/*
* GetUserMediaDevices - called by the UI-part of getUserMedia from chrome JS.
*/
nsresult MediaManager::GetUserMediaDevices(
nsPIDOMWindowInner* aWindow, const MediaStreamConstraints& aConstraints,
MozGetUserMediaDevicesSuccessCallback& aOnSuccess, uint64_t aWindowId,
const nsAString& aCallID) {
MOZ_ASSERT(NS_IsMainThread());
if (!aWindowId) {
aWindowId = aWindow->WindowID();
}
// Ignore passed-in constraints, instead locate + return already-constrained
// list.
nsTArray<nsString>* callIDs;
if (!mCallIds.Get(aWindowId, &callIDs)) {
return NS_ERROR_UNEXPECTED;
}
for (auto& callID : *callIDs) {
RefPtr<GetUserMediaTask> task;
if (!aCallID.Length() || aCallID == callID) {
if (mActiveCallbacks.Get(callID, getter_AddRefs(task))) {
nsCOMPtr<nsIWritableVariant> array =
MediaManager::ToJSArray(*task->mMediaDeviceSet);
aOnSuccess.Call(array);
return NS_OK;
}
}
}
return NS_ERROR_UNEXPECTED;
}
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(mPrefs);
#else
mBackend = new MediaEngineDefault();
#endif
mBackend->AddDeviceChangeCallback(this);
}
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);
}
mCallIds.Remove(aWindowID);
}
// This is safe since we're on main-thread, and the windowlist can only
// be added to from the main-thread
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowID);
if (window) {
IterateWindowListeners(
window, [self = RefPtr<MediaManager>(this),
windowID = DebugOnly<decltype(aWindowID)>(aWindowID)](
const RefPtr<GetUserMediaWindowListener>& aListener) {
aListener->RemoveAll();
MOZ_ASSERT(!self->GetWindowListener(windowID));
});
} else {
RemoveWindowID(aWindowID);
}
MOZ_ASSERT(!GetWindowListener(aWindowID));
RemoveMediaDevicesCallback(aWindowID);
}
void MediaManager::RemoveMediaDevicesCallback(uint64_t aWindowID) {
MutexAutoLock lock(mCallbackMutex);
for (DeviceChangeCallback* observer : mDeviceChangeCallbackList) {
MediaDevices* mediadevices = static_cast<MediaDevices*>(observer);
MOZ_ASSERT(mediadevices);
if (mediadevices) {
nsPIDOMWindowInner* window = mediadevices->GetOwner();
MOZ_ASSERT(window);
if (window && window->WindowID() == aWindowID) {
DeviceChangeCallback::RemoveDeviceChangeCallbackLocked(observer);
return;
}
}
}
}
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;
}
GetActiveWindows()->Put(aWindowId, aListener.forget());
}
void MediaManager::RemoveWindowID(uint64_t aWindowId) {
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->NotifyObservers(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.noise_enabled", aData,
&mPrefs.mNoiseOn);
GetPref(aBranch, "media.getusermedia.aec", aData, &mPrefs.mAec);
GetPref(aBranch, "media.getusermedia.agc", aData, &mPrefs.mAgc);
GetPref(aBranch, "media.getusermedia.noise", aData, &mPrefs.mNoise);
GetPrefBool(aBranch, "media.getusermedia.aec_extended_filter", aData,
&mPrefs.mExtendedFilter);
GetPrefBool(aBranch, "media.getusermedia.aec_aec_delay_agnostic", aData,
&mPrefs.mDelayAgnostic);
GetPref(aBranch, "media.getusermedia.channels", aData, &mPrefs.mChannels);
GetPrefBool(aBranch, "media.ondevicechange.fakeDeviceChangeEvent.enabled",
aData, &mPrefs.mFakeDeviceChangeEventOn);
#endif
GetPrefBool(aBranch, "media.navigator.audio.full_duplex", aData,
&mPrefs.mFullDuplex);
}
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");
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.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
prefs->RemoveObserver("media.navigator.audio.full_duplex", this);
}
{
// 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.
nsTArray<RefPtr<GetUserMediaWindowListener>> listeners(
GetActiveWindows()->Count());
for (auto iter = GetActiveWindows()->Iter(); !iter.Done(); iter.Next()) {
listeners.AppendElement(iter.UserData());
}
for (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->Shutdown(); // ok to invoke multiple times
mManager->mBackend->RemoveDeviceChangeCallback(mManager);
}
}
mozilla::ipc::BackgroundChild::CloseForCurrentThread();
// 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
MOZ_ASSERT(this == sSingleton);
// Release the backend (and call Shutdown()) from within the MediaManager
// thread Don't use MediaManager::PostTask() because we're sHasShutdown=true
// here!
auto shutdown = MakeRefPtr<ShutdownTask>(
this, media::NewRunnableFrom([this, self = RefPtr<MediaManager>(this)]() {
LOG("MediaManager shutdown lambda running, releasing MediaManager "
"singleton and thread");
if (mMediaThread) {
mMediaThread->Stop();
}
// Remove async shutdown blocker
media::GetShutdownBarrier()->RemoveBlocker(
sSingleton->mShutdownBlocker);
// we hold a ref to 'self' which is the same as sSingleton
sSingleton = nullptr;
return NS_OK;
}));
mMediaThread->message_loop()->PostTask(shutdown.forget());
}
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;
}
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::PostTask(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;
mActiveCallbacks.Remove(key, getter_AddRefs(task));
if (!task) {
return NS_OK;
}
nsTArray<nsString>* array;
if (!mCallIds.Get(task->GetWindowID(), &array)) {
return NS_OK;
}
array->RemoveElement(key);
if (aSubject) {
// A particular device or devices were chosen by the user.
// NOTE: does not allow setting a device to null; assumes nullptr
nsCOMPtr<nsIArray> array(do_QueryInterface(aSubject));
MOZ_ASSERT(array);
uint32_t len = 0;
array->GetLength(&len);
bool videoFound = false, audioFound = false;
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());
if (dev->mKind == MediaDeviceKind::Videoinput) {
if (!videoFound) {
task->SetVideoDevice(dev);
videoFound = true;
}
} else if (dev->mKind == MediaDeviceKind::Audioinput) {
if (!audioFound) {
task->SetAudioDevice(dev);
audioFound = true;
}
} else {
NS_WARNING("Unknown device type in getUserMedia");
}
}
bool needVideo = IsOn(task->GetConstraints().mVideo);
bool needAudio = IsOn(task->GetConstraints().mAudio);
MOZ_ASSERT(needVideo || needAudio);
if ((needVideo && !videoFound) || (needAudio && !audioFound)) {
task->Denied(MediaMgrError::Name::NotAllowedError);
return NS_OK;
}
}
if (sHasShutdown) {
return task->Denied(MediaMgrError::Name::AbortError,
NS_LITERAL_STRING("In shutdown"));
}
// Reuse the same thread to save memory.
MediaManager::PostTask(task.forget());
return NS_OK;
} else if (IsGUMResponseNoAccess(aTopic, gumNoAccessError)) {
nsString key(aData);
RefPtr<GetUserMediaTask> task;
mActiveCallbacks.Remove(key, getter_AddRefs(task));
if (task) {
task->Denied(gumNoAccessError);
nsTArray<nsString>* array;
if (!mCallIds.Get(task->GetWindowID(), &array)) {
return NS_OK;
}
array->RemoveElement(key);
SendPendingGUMRequest();
}
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:revoke")) {
nsresult rv;
// may be windowid or screen:windowid
nsDependentString data(aData);
if (Substring(data, 0, strlen("screen:")).EqualsLiteral("screen:")) {
uint64_t windowID = PromiseFlatString(Substring(data, strlen("screen:")))
.ToInteger64(&rv);
MOZ_ASSERT(NS_SUCCEEDED(rv));
if (NS_SUCCEEDED(rv)) {
LOG("Revoking Screen/windowCapture access for window %" PRIu64,
windowID);
StopScreensharing(windowID);
}
} else {
uint64_t windowID = nsString(aData).ToInteger64(&rv);
MOZ_ASSERT(NS_SUCCEEDED(rv));
if (NS_SUCCEEDED(rv)) {
LOG("Revoking MediaCapture access for window %" PRIu64, windowID);
OnNavigation(windowID);
}
}
return NS_OK;
}
return NS_OK;
}
nsresult MediaManager::GetActiveMediaCaptureWindows(nsIArray** aArray) {
MOZ_ASSERT(aArray);
nsCOMPtr<nsIMutableArray> array = nsArray::Create();
for (auto iter = mActiveWindows.Iter(); !iter.Done(); iter.Next()) {
const uint64_t& id = iter.Key();
RefPtr<GetUserMediaWindowListener> winListener = iter.UserData();
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) {
MOZ_ASSERT(NS_IsMainThread());
CaptureState camera = CaptureState::Off;
CaptureState microphone = CaptureState::Off;
CaptureState screen = CaptureState::Off;
CaptureState window = CaptureState::Off;
CaptureState browser = CaptureState::Off;
nsCOMPtr<nsPIDOMWindowInner> piWin = do_QueryInterface(aCapturedWindow);
if (piWin) {
IterateWindowListeners(
piWin, [&camera, &microphone, &screen, &window,
&browser](const RefPtr<GetUserMediaWindowListener>& aListener) {
camera = CombineCaptureState(
camera, aListener->CapturingSource(MediaSourceEnum::Camera));
microphone = CombineCaptureState(
microphone,
aListener->CapturingSource(MediaSourceEnum::Microphone));
screen = CombineCaptureState(
screen, aListener->CapturingSource(MediaSourceEnum::Screen));
window = CombineCaptureState(
window, aListener->CapturingSource(MediaSourceEnum::Window));
browser = CombineCaptureState(
browser, aListener->CapturingSource(MediaSourceEnum::Browser));
});
}
*aCamera = FromCaptureState(camera);
*aMicrophone = FromCaptureState(microphone);
*aScreen = FromCaptureState(screen);
*aWindow = FromCaptureState(window);
*aBrowser = FromCaptureState(browser);
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 all innerwindows
// that correspond to that outerwindow.
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowID);
if (!window) {
return;
}
IterateWindowListeners(
window, [](const RefPtr<GetUserMediaWindowListener>& aListener) {
aListener->StopSharing();
});
}
template <typename FunctionType>
void MediaManager::IterateWindowListeners(nsPIDOMWindowInner* aWindow,
const FunctionType& aCallback) {
// Iterate the docshell tree to find all the child windows, and for each
// invoke the callback
if (aWindow) {
{
uint64_t windowID = aWindow->WindowID();
RefPtr<GetUserMediaWindowListener> listener = GetWindowListener(windowID);
if (listener) {
aCallback(listener);
}
// NB: `listener` might have been destroyed.
}
// iterate any children of *this* window (iframes, etc)
nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell();
if (docShell) {
int32_t i, count;
docShell->GetChildCount(&count);
for (i = 0; i < count; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
docShell->GetChildAt(i, getter_AddRefs(item));
nsCOMPtr<nsPIDOMWindowOuter> winOuter =
item ? item->GetWindow() : nullptr;
if (winOuter) {
IterateWindowListeners(winOuter->GetCurrentInnerWindow(), aCallback);
}
}
}
}
}
void MediaManager::StopMediaStreams() {
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) {
OnNavigation(win->WindowID());
}
}
}
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;
nsCOMPtr<nsIPermissionManager> mgr =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false; // no permission manager no permissions!
}
uint32_t audio = nsIPermissionManager::UNKNOWN_ACTION;
uint32_t video = nsIPermissionManager::UNKNOWN_ACTION;
{
if (!FeaturePolicyUtils::IsFeatureAllowed(
doc, NS_LITERAL_STRING("microphone"))) {
audio = nsIPermissionManager::DENY_ACTION;
} else {
rv = mgr->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("microphone"), &audio);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
if (!FeaturePolicyUtils::IsFeatureAllowed(doc,
NS_LITERAL_STRING("camera"))) {
video = nsIPermissionManager::DENY_ACTION;
} else {
rv = mgr->TestExactPermissionFromPrincipal(
principal, NS_LITERAL_CSTRING("camera"), &video);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
}
return audio == nsIPermissionManager::ALLOW_ACTION ||
video == nsIPermissionManager::ALLOW_ACTION;
}
SourceListener::SourceListener()
: mStopped(false),
mMainThreadCheck(nullptr),
mPrincipalHandle(PRINCIPAL_HANDLE_NONE),
mWindowListener(nullptr) {}
void SourceListener::Register(GetUserMediaWindowListener* aListener) {
LOG("SourceListener %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 SourceListener::Activate(RefPtr<SourceMediaStream> aStream,
RefPtr<MediaDevice> aAudioDevice,
RefPtr<MediaDevice> aVideoDevice) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
LOG("SourceListener %p activating audio=%p video=%p", this,
aAudioDevice.get(), aVideoDevice.get());
MOZ_ASSERT(!mStopped, "Cannot activate stopped source listener");
MOZ_ASSERT(!Activated(), "Already activated");
mMainThreadCheck = GetCurrentVirtualThread();
mStream = std::move(aStream);
if (aAudioDevice) {
bool offWhileDisabled =
aAudioDevice->GetMediaSource() == MediaSourceEnum::Microphone &&
Preferences::GetBool(
"media.getusermedia.microphone.off_while_disabled.enabled", true);
mAudioDeviceState =
MakeUnique<DeviceState>(std::move(aAudioDevice), offWhileDisabled);
}
if (aVideoDevice) {
bool offWhileDisabled =
aVideoDevice->GetMediaSource() == MediaSourceEnum::Camera &&
Preferences::GetBool(
"media.getusermedia.camera.off_while_disabled.enabled", true);
mVideoDeviceState =
MakeUnique<DeviceState>(std::move(aVideoDevice), offWhileDisabled);
}
}
RefPtr<SourceListener::SourceListenerPromise>
SourceListener::InitializeAsync() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_DIAGNOSTIC_ASSERT(!mStopped);
return MediaManager::PostTask<SourceListenerPromise>(
__func__,
[stream = mStream, principal = GetPrincipalHandle(),
audioDevice =
mAudioDeviceState ? mAudioDeviceState->mDevice : nullptr,
videoDevice =
mVideoDeviceState ? mVideoDeviceState->mDevice : nullptr](
MozPromiseHolder<SourceListenerPromise>& aHolder) {
if (audioDevice) {
audioDevice->SetTrack(stream, kAudioTrack, principal);
}
if (videoDevice) {
videoDevice->SetTrack(stream, kVideoTrack, principal);
}
// SetTrack() queued the tracks. We add them synchronously here
// to avoid races.
stream->FinishAddTracks();
if (audioDevice) {
nsresult rv = audioDevice->Start();
if (rv == NS_ERROR_NOT_AVAILABLE) {
PR_Sleep(200);
rv = audioDevice->Start();
}
if (NS_FAILED(rv)) {
nsString log;
if (rv == NS_ERROR_NOT_AVAILABLE) {
log.AssignLiteral("Concurrent mic process limit.");
aHolder.Reject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::NotReadableError, log),
__func__);
return;
}
log.AssignLiteral("Starting audio failed");
aHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError, log),
__func__);
return;
}
}
if (videoDevice) {
nsresult rv = videoDevice->Start();
if (NS_FAILED(rv)) {
if (audioDevice) {
if (NS_WARN_IF(NS_FAILED(audioDevice->Stop()))) {
MOZ_ASSERT_UNREACHABLE("Stopping audio failed");
}
}
nsString log;
log.AssignLiteral("Starting video failed");
aHolder.Reject(MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::AbortError, log),
__func__);
return;
}
}
LOG("started all sources");
aHolder.Resolve(true, __func__);
})
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self = RefPtr<SourceListener>(this), this]() {
if (mStopped) {
// We were shut down during the async init
return SourceListenerPromise::CreateAndResolve(true, __func__);
}
for (DeviceState* state :
{mAudioDeviceState.get(), mVideoDeviceState.get()}) {
if (!state) {
continue;
}
MOZ_DIAGNOSTIC_ASSERT(!state->mTrackEnabled);
MOZ_DIAGNOSTIC_ASSERT(!state->mDeviceEnabled);
MOZ_DIAGNOSTIC_ASSERT(!state->mStopped);
state->mDeviceEnabled = true;
state->mTrackEnabled = true;
state->mTrackEnabledTime = TimeStamp::Now();
}
return SourceListenerPromise::CreateAndResolve(true, __func__);
},
[self = RefPtr<SourceListener>(this),
this](RefPtr<MediaMgrError>&& aResult) {
if (mStopped) {
return SourceListenerPromise::CreateAndReject(std::move(aResult),
__func__);
}
for (DeviceState* state :
{mAudioDeviceState.get(), mVideoDeviceState.get()}) {
if (!state) {
continue;
}
MOZ_DIAGNOSTIC_ASSERT(!state->mTrackEnabled);
MOZ_DIAGNOSTIC_ASSERT(!state->mDeviceEnabled);
MOZ_DIAGNOSTIC_ASSERT(!state->mStopped);
state->mStopped = true;
}
return SourceListenerPromise::CreateAndReject(std::move(aResult),
__func__);
});
}
void SourceListener::Stop() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
// StopSharing() has some special logic, at least for audio capture.
// It must be called when all tracks have stopped, before setting mStopped.
StopSharing();
if (mStopped) {
return;
}
mStopped = true;
LOG("SourceListener %p stopping", this);
if (mAudioDeviceState) {
mAudioDeviceState->mDisableTimer->Cancel();
if (!mAudioDeviceState->mStopped) {
StopTrack(kAudioTrack);
}
}
if (mVideoDeviceState) {
mVideoDeviceState->mDisableTimer->Cancel();
if (!mVideoDeviceState->mStopped) {
StopTrack(kVideoTrack);
}
}
mWindowListener->Remove(this);
mWindowListener = nullptr;
}
void SourceListener::StopTrack(TrackID aTrackID) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_ASSERT(Activated(), "No device to stop");
MOZ_ASSERT(aTrackID == kAudioTrack || aTrackID == kVideoTrack,
"Unknown track id");
DeviceState& state = GetDeviceStateFor(aTrackID);
LOG("SourceListener %p stopping %s track %d", this,
aTrackID == kAudioTrack ? "audio" : "video", aTrackID);
if (state.mStopped) {
// device already stopped.
return;
}
state.mStopped = true;
state.mDisableTimer->Cancel();
MediaManager::PostTask(NewTaskFrom([device = state.mDevice]() {
device->Stop();
device->Deallocate();
}));
MOZ_ASSERT(mWindowListener, "Should still have window listener");
mWindowListener->ChromeAffectingStateChanged();
if ((!mAudioDeviceState || mAudioDeviceState->mStopped) &&
(!mVideoDeviceState || mVideoDeviceState->mStopped)) {
LOG("SourceListener %p this was the last track stopped", this);
Stop();
}
}
void SourceListener::GetSettingsFor(TrackID aTrackID,
MediaTrackSettings& aOutSettings) const {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
DeviceState& state = GetDeviceStateFor(aTrackID);
state.mDevice->GetSettings(aOutSettings);
MediaSourceEnum mediaSource = state.mDevice->GetMediaSource();
if (mediaSource == MediaSourceEnum::Camera ||
mediaSource == MediaSourceEnum::Microphone) {
aOutSettings.mDeviceId.Construct(state.mDevice->mID);
aOutSettings.mGroupId.Construct(state.mDevice->mGroupID);
}
}
void SourceListener::SetEnabledFor(TrackID aTrackID, bool aEnable) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
MOZ_ASSERT(Activated(), "No device to set enabled state for");
MOZ_ASSERT(aTrackID == kAudioTrack || aTrackID == kVideoTrack,
"Unknown track id");
LOG("SourceListener %p %s %s track %d", this,
aEnable ? "enabling" : "disabling",
aTrackID == kAudioTrack ? "audio" : "video", aTrackID);
DeviceState& state = GetDeviceStateFor(aTrackID);
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(
aTrackID == kAudioTrack
? "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__);
}
typedef MozPromise<nsresult, bool, /* IsExclusive = */ true>
DeviceOperationPromise;
RefPtr<SourceListener> self = this;
timerPromise
->Then(
GetMainThreadSerialEventTarget(), __func__,
[self, this, &state, aTrackID, 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("SourceListener %p %s %s track %d - starting device operation",
this, aEnable ? "enabling" : "disabling",
aTrackID == kAudioTrack ? "audio" : "video", aTrackID);
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) {
// If the feature to turn a device off while disabled is itself
// disabled we shortcut the device operation and tell the
// ux-updating code that everything went fine.
return DeviceOperationPromise::CreateAndResolve(NS_OK, __func__);
}
return MediaManager::PostTask<DeviceOperationPromise>(
__func__, [self, device = state.mDevice, aEnable](
MozPromiseHolder<DeviceOperationPromise>& h) {
h.Resolve(aEnable ? device->Start() : device->Stop(),
__func__);
});
},
[]() {
// 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, aTrackID, 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;
}
LOG("SourceListener %p %s %s track %d %s", this,
aEnable ? "enabling" : "disabling",
aTrackID == kAudioTrack ? "audio" : "video", aTrackID,
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 (aEnable) {
// Starting the device failed. Stopping the track here will make
// the MediaStreamTrack end after a pass through the
// MediaStreamGraph.
StopTrack(aTrackID);
} else {
// Stopping the device failed. This is odd, but not fatal.
MOZ_ASSERT_UNREACHABLE("The device should be stoppable");
// 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) {
// Intended state is same as device's current state.
// Nothing more to do.
return;
}
// Track state changed during this operation. We'll start over.
if (state.mTrackEnabled) {
SetEnabledFor(aTrackID, true);
} else {
SetEnabledFor(aTrackID, false);
}
},
[]() { MOZ_ASSERT_UNREACHABLE("Unexpected and unhandled reject"); });
}
void SourceListener::StopSharing() {
MOZ_ASSERT(NS_IsMainThread());
if (mStopped) {
return;
}
MOZ_RELEASE_ASSERT(mWindowListener);
LOG("SourceListener %p StopSharing", this);
RefPtr<SourceListener> self(this);
if (mVideoDeviceState && (mVideoDeviceState->mDevice->GetMediaSource() ==
MediaSourceEnum::Screen ||
mVideoDeviceState->mDevice->GetMediaSource() ==
MediaSourceEnum::Window)) {
// We want to stop the whole stream if there's no audio;
// just the video track if we have both.
// StopTrack figures this out for us.
StopTrack(kVideoTrack);
}
if (mAudioDeviceState && mAudioDeviceState->mDevice->GetMediaSource() ==
MediaSourceEnum::AudioCapture) {
uint64_t windowID = mWindowListener->WindowID();
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(windowID);
MOZ_RELEASE_ASSERT(window);
window->SetAudioCapture(false);
MediaStreamGraph* graph = mStream->Graph();
graph->UnregisterCaptureStreamForWindow(windowID);
mStream->Destroy();
}
}
SourceMediaStream* SourceListener::GetSourceStream() {
NS_ASSERTION(mStream, "Getting stream from never-activated SourceListener");
return mStream;
}
bool SourceListener::CapturingVideo() const {
MOZ_ASSERT(NS_IsMainThread());
return Activated() && mVideoDeviceState && !mVideoDeviceState->mStopped &&
(!mVideoDeviceState->mDevice->mSource->IsFake() ||
Preferences::GetBool("media.navigator.permission.fake"));
}
bool SourceListener::CapturingAudio() const {
MOZ_ASSERT(NS_IsMainThread());
return Activated() && mAudioDeviceState && !mAudioDeviceState->mStopped &&
(!mAudioDeviceState->mDevice->mSource->IsFake() ||
Preferences::GetBool("media.navigator.permission.fake"));
}
CaptureState SourceListener::CapturingSource(MediaSourceEnum aSource) const {
MOZ_ASSERT(NS_IsMainThread());
if ((!GetVideoDevice() || GetVideoDevice()->GetMediaSource() != aSource) &&
(!GetAudioDevice() || GetAudioDevice()->GetMediaSource() != aSource)) {
// This SourceListener doesn't capture a matching source
return CaptureState::Off;
}
DeviceState& state =
(GetAudioDevice() && GetAudioDevice()->GetMediaSource() == aSource)
? *mAudioDeviceState
: *mVideoDeviceState;
MOZ_ASSERT(state.mDevice->GetMediaSource() == aSource);
if (state.mStopped) {
// The source is a match but has been permanently stopped
return CaptureState::Off;
}
if ((aSource == MediaSourceEnum::Camera ||
aSource == MediaSourceEnum::Microphone) &&
state.mDevice->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
if (state.mDeviceEnabled) {
return CaptureState::Enabled;
}
return CaptureState::Disabled;
}
RefPtr<SourceListener::SourceListenerPromise>
SourceListener::ApplyConstraintsToTrack(
TrackID aTrackID, const MediaTrackConstraints& aConstraints,
CallerType aCallerType) {
MOZ_ASSERT(NS_IsMainThread());
DeviceState& state = GetDeviceStateFor(aTrackID);
if (mStopped || state.mStopped) {
LOG("gUM %s track %d applyConstraints, but source is stopped",
aTrackID == kAudioTrack ? "audio" : "video", aTrackID);
return SourceListenerPromise::CreateAndResolve(false, __func__);
}
MediaManager* mgr = MediaManager::GetIfExists();
if (!mgr) {
return SourceListenerPromise::CreateAndResolve(false, __func__);
}
return MediaManager::PostTask<SourceListenerPromise>(
__func__, [device = state.mDevice, aConstraints,
isChrome = aCallerType == CallerType::System](
MozPromiseHolder<SourceListenerPromise>& 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, isChrome);
}
} else {
// Unexpected. ApplyConstraints* cannot fail with any other error.
badConstraint = "";
LOG("ApplyConstraintsToTrack-Task: Unexpected fail %" PRIx32,
static_cast<uint32_t>(rv));
}
aHolder.Reject(
MakeRefPtr<MediaMgrError>(
MediaMgrError::Name::OverconstrainedError,
NS_LITERAL_STRING(""), NS_ConvertASCIItoUTF16(badConstraint)),
__func__);
return;
}
// Reconfigure was successful
aHolder.Resolve(false, __func__);
});
}
PrincipalHandle SourceListener::GetPrincipalHandle() const {
return mPrincipalHandle;
}
DeviceState& SourceListener::GetDeviceStateFor(TrackID aTrackID) const {
// XXX to support multiple tracks of a type in a stream, this should key off
// the TrackID and not just the type
switch (aTrackID) {
case kAudioTrack:
MOZ_ASSERT(mAudioDeviceState, "No audio device");
return *mAudioDeviceState;
case kVideoTrack:
MOZ_ASSERT(mVideoDeviceState, "No video device");
return *mVideoDeviceState;
default:
MOZ_CRASH("Unknown track id");
}
}
// Doesn't kill audio
void GetUserMediaWindowListener::StopSharing() {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
for (auto& l : nsTArray<RefPtr<SourceListener>>(mActiveListeners)) {
l->StopSharing();
}
}
void GetUserMediaWindowListener::StopRawID(const nsString& removedDeviceID) {
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
for (auto& source : nsTArray<RefPtr<SourceListener>>(mActiveListeners)) {
if (source->GetAudioDevice()) {
nsString id;
source->GetAudioDevice()->GetRawId(id);
if (removedDeviceID.Equals(id)) {
source->StopTrack(kAudioTrack);
}
}
if (source->GetVideoDevice()) {
nsString id;
source->GetVideoDevice()->GetRawId(id);
if (removedDeviceID.Equals(id)) {
source->StopTrack(kVideoTrack);
}
}
}
}
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;
}
}));
}
} // namespace mozilla