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gecko-dev/dom/media/MediaManager.cpp

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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaManager.h"
#include "MediaStreamGraph.h"
#include "mozilla/dom/MediaStreamTrack.h"
#include "GetUserMediaRequest.h"
#include "nsHashPropertyBag.h"
#ifdef MOZ_WIDGET_GONK
#include "nsIAudioManager.h"
#endif
#include "nsIEventTarget.h"
#include "nsIUUIDGenerator.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPermissionManager.h"
#include "nsIPopupWindowManager.h"
#include "nsISupportsArray.h"
#include "nsIDocShell.h"
#include "nsIDocument.h"
#include "nsISupportsPrimitives.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIIDNService.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsPrincipal.h"
#include "nsICryptoHash.h"
#include "nsICryptoHMAC.h"
#include "nsIKeyModule.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsIInputStream.h"
#include "nsILineInputStream.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Types.h"
#include "mozilla/PeerIdentity.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/MediaStreamBinding.h"
#include "mozilla/dom/MediaStreamTrackBinding.h"
#include "mozilla/dom/GetUserMediaRequestBinding.h"
#include "mozilla/Preferences.h"
#include "mozilla/Base64.h"
#include "mozilla/ipc/BackgroundChild.h"
#include "mozilla/media/MediaChild.h"
#include "MediaTrackConstraints.h"
#include "VideoUtils.h"
#include "Latency.h"
#include "nsProxyRelease.h"
#include "nsNullPrincipal.h"
#include "nsVariant.h"
// For PR_snprintf
#include "prprf.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"
#endif
#ifdef MOZ_B2G
#include "MediaPermissionGonk.h"
#endif
#if defined(XP_MACOSX)
#include "nsCocoaFeatures.h"
#endif
#if defined (XP_WIN)
#include "mozilla/WindowsVersion.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::VideoDevice, void> {
static const nsIID kIID;
};
const nsIID nsIMediaDevice::COMTypeInfo<mozilla::VideoDevice, void>::kIID = NS_IMEDIADEVICE_IID;
template<>
struct nsIMediaDevice::COMTypeInfo<mozilla::AudioDevice, void> {
static const nsIID kIID;
};
const nsIID nsIMediaDevice::COMTypeInfo<mozilla::AudioDevice, void>::kIID = NS_IMEDIADEVICE_IID;
namespace {
already_AddRefed<nsIAsyncShutdownClient> GetShutdownPhase() {
nsCOMPtr<nsIAsyncShutdownService> svc = services::GetAsyncShutdown();
MOZ_RELEASE_ASSERT(svc);
nsCOMPtr<nsIAsyncShutdownClient> shutdownPhase;
nsresult rv = svc->GetProfileBeforeChange(getter_AddRefs(shutdownPhase));
if (!shutdownPhase) {
// We are probably in a content process.
rv = svc->GetContentChildShutdown(getter_AddRefs(shutdownPhase));
}
MOZ_RELEASE_ASSERT(shutdownPhase);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return shutdownPhase.forget();
}
}
namespace mozilla {
#ifdef LOG
#undef LOG
#endif
LogModule*
GetMediaManagerLog()
{
static LazyLogModule sLog("MediaManager");
return sLog;
}
#define LOG(msg) MOZ_LOG(GetMediaManagerLog(), mozilla::LogLevel::Debug, msg)
using dom::File;
using dom::MediaStreamConstraints;
using dom::MediaTrackConstraintSet;
using dom::MediaTrackConstraints;
using dom::MediaStreamTrack;
using dom::MediaStreamError;
using dom::GetUserMediaRequest;
using dom::Sequence;
using dom::OwningBooleanOrMediaTrackConstraints;
using media::Pledge;
using media::NewRunnableFrom;
using media::NewTaskFrom;
static Atomic<bool> sInShutdown;
static bool
HostInDomain(const nsCString &aHost, const nsCString &aPattern)
{
int32_t patternOffset = 0;
int32_t hostOffset = 0;
// Act on '*.' wildcard in the left-most position in a domain pattern.
if (aPattern.Length() > 2 && aPattern[0] == '*' && aPattern[1] == '.') {
patternOffset = 2;
// Ignore the lowest level sub-domain for the hostname.
hostOffset = aHost.FindChar('.') + 1;
if (hostOffset <= 1) {
// Reject a match between a wildcard and a TLD or '.foo' form.
return false;
}
}
nsDependentCString hostRoot(aHost, hostOffset);
return hostRoot.EqualsIgnoreCase(aPattern.BeginReading() + patternOffset);
}
static bool
HostHasPermission(nsIURI &docURI)
{
nsresult rv;
bool isHttps;
rv = docURI.SchemeIs("https",&isHttps);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
if (!isHttps) {
return false;
}
nsAdoptingCString hostName;
docURI.GetAsciiHost(hostName); //normalize UTF8 to ASCII equivalent
nsAdoptingCString domainWhiteList =
Preferences::GetCString("media.getusermedia.screensharing.allowed_domains");
domainWhiteList.StripWhitespace();
if (domainWhiteList.IsEmpty() || hostName.IsEmpty()) {
return false;
}
// Get UTF8 to ASCII domain name normalization service
nsCOMPtr<nsIIDNService> idnService
= do_GetService("@mozilla.org/network/idn-service;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
uint32_t begin = 0;
uint32_t end = 0;
nsCString domainName;
/*
Test each domain name in the comma separated list
after converting from UTF8 to ASCII. Each domain
must match exactly or have a single leading '*.' wildcard
*/
do {
end = domainWhiteList.FindChar(',', begin);
if (end == (uint32_t)-1) {
// Last or only domain name in the comma separated list
end = domainWhiteList.Length();
}
rv = idnService->ConvertUTF8toACE(Substring(domainWhiteList, begin, end - begin),
domainName);
if (NS_SUCCEEDED(rv)) {
if (HostInDomain(hostName, domainName)) {
return true;
}
} else {
NS_WARNING("Failed to convert UTF-8 host to ASCII");
}
begin = end + 1;
} while (end < domainWhiteList.Length());
return false;
}
// Generic class for running long media operations like Start off the main
// thread, and then (because nsDOMMediaStreams aren't threadsafe),
// ProxyReleases mStream since it's cycle collected.
class MediaOperationTask : public Task
{
public:
// so we can send Stop without AddRef()ing from the MSG thread
MediaOperationTask(MediaOperation aType,
GetUserMediaCallbackMediaStreamListener* aListener,
DOMMediaStream* aStream,
DOMMediaStream::OnTracksAvailableCallback* aOnTracksAvailableCallback,
AudioDevice* aAudioDevice,
VideoDevice* aVideoDevice,
bool aBool,
uint64_t aWindowID,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
const dom::MediaTrackConstraints& aConstraints = dom::MediaTrackConstraints())
: mType(aType)
, mStream(aStream)
, mOnTracksAvailableCallback(aOnTracksAvailableCallback)
, mAudioDevice(aAudioDevice)
, mVideoDevice(aVideoDevice)
, mListener(aListener)
, mBool(aBool)
, mWindowID(aWindowID)
, mOnFailure(aError)
, mConstraints(aConstraints)
{}
~MediaOperationTask()
{
// MediaStreams can be released on any thread.
}
void
ReturnCallbackError(nsresult rv, const char* errorLog);
void
Run()
{
SourceMediaStream *source = mListener->GetSourceStream();
// No locking between these is required as all the callbacks for the
// same MediaStream will occur on the same thread.
if (!source) // means the stream was never Activated()
return;
switch (mType) {
case MEDIA_START:
{
NS_ASSERTION(!NS_IsMainThread(), "Never call on main thread");
nsresult rv;
if (mAudioDevice) {
rv = mAudioDevice->GetSource()->Start(source, kAudioTrack);
if (NS_FAILED(rv)) {
ReturnCallbackError(rv, "Starting audio failed");
return;
}
}
if (mVideoDevice) {
rv = mVideoDevice->GetSource()->Start(source, kVideoTrack);
if (NS_FAILED(rv)) {
ReturnCallbackError(rv, "Starting video failed");
return;
}
}
// Start() queued the tracks to be added synchronously to avoid races
source->FinishAddTracks();
source->SetPullEnabled(true);
source->AdvanceKnownTracksTime(STREAM_TIME_MAX);
MM_LOG(("started all sources"));
// Forward mOnTracksAvailableCallback to GetUserMediaNotificationEvent,
// because mOnTracksAvailableCallback needs to be added to mStream
// on the main thread.
nsIRunnable *event =
new GetUserMediaNotificationEvent(GetUserMediaNotificationEvent::STARTING,
mStream.forget(),
mOnTracksAvailableCallback.forget(),
mAudioDevice != nullptr,
mVideoDevice != nullptr,
mWindowID, mOnFailure.forget());
// event must always be released on mainthread due to the JS callbacks
// in the TracksAvailableCallback
NS_DispatchToMainThread(event);
}
break;
case MEDIA_STOP:
case MEDIA_STOP_TRACK:
{
NS_ASSERTION(!NS_IsMainThread(), "Never call on main thread");
if (mAudioDevice) {
mAudioDevice->GetSource()->Stop(source, kAudioTrack);
mAudioDevice->GetSource()->Deallocate();
}
if (mVideoDevice) {
mVideoDevice->GetSource()->Stop(source, kVideoTrack);
mVideoDevice->GetSource()->Deallocate();
}
// We consider ourselves finished if all tracks have been stopped, as
// there is no way to restart them from the JS APIs.
if (mBool || ((!mAudioDevice || mAudioDevice->GetSource()->IsAvailable()) &&
(!mVideoDevice || mVideoDevice->GetSource()->IsAvailable()))) {
source->Finish();
}
nsIRunnable *event =
new GetUserMediaNotificationEvent(mListener,
mType == MEDIA_STOP ?
GetUserMediaNotificationEvent::STOPPING :
GetUserMediaNotificationEvent::STOPPED_TRACK,
mAudioDevice != nullptr,
mVideoDevice != nullptr,
mWindowID);
// event must always be released on mainthread due to the JS callbacks
// in the TracksAvailableCallback
NS_DispatchToMainThread(event);
}
break;
case MEDIA_DIRECT_LISTENERS:
{
NS_ASSERTION(!NS_IsMainThread(), "Never call on main thread");
if (mVideoDevice) {
mVideoDevice->GetSource()->SetDirectListeners(mBool);
}
}
break;
default:
MOZ_ASSERT(false,"invalid MediaManager operation");
break;
}
}
private:
MediaOperation mType;
RefPtr<DOMMediaStream> mStream;
nsAutoPtr<DOMMediaStream::OnTracksAvailableCallback> mOnTracksAvailableCallback;
RefPtr<AudioDevice> mAudioDevice; // threadsafe
RefPtr<VideoDevice> mVideoDevice; // threadsafe
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener; // threadsafe
bool mBool;
uint64_t mWindowID;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mOnFailure;
dom::MediaTrackConstraints mConstraints;
};
/**
* Send an error back to content.
* Do this only on the main thread. The onSuccess callback is also passed here
* so it can be released correctly.
*/
template<class SuccessCallbackType>
class ErrorCallbackRunnable : public nsRunnable
{
public:
ErrorCallbackRunnable(
nsCOMPtr<SuccessCallbackType>& aOnSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aOnFailure,
MediaMgrError& aError,
uint64_t aWindowID)
: mError(&aError)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance())
{
mOnSuccess.swap(aOnSuccess);
mOnFailure.swap(aOnFailure);
}
NS_IMETHODIMP
Run()
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<SuccessCallbackType> onSuccess = mOnSuccess.forget();
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure = mOnFailure.forget();
// Only run if the window is still active.
if (!(mManager->IsWindowStillActive(mWindowID))) {
return NS_OK;
}
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
nsGlobalWindow* window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
if (window) {
RefPtr<MediaStreamError> error = new MediaStreamError(window, *mError);
onFailure->OnError(error);
}
return NS_OK;
}
private:
~ErrorCallbackRunnable()
{
MOZ_ASSERT(!mOnSuccess && !mOnFailure);
}
nsCOMPtr<SuccessCallbackType> mOnSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mOnFailure;
RefPtr<MediaMgrError> mError;
uint64_t mWindowID;
RefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
// Handle removing GetUserMediaCallbackMediaStreamListener from main thread
class GetUserMediaListenerRemove: public nsRunnable
{
public:
GetUserMediaListenerRemove(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
: mWindowID(aWindowID)
, mListener(aListener) {}
NS_IMETHOD
Run()
{
MOZ_ASSERT(NS_IsMainThread());
RefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
return NS_OK;
}
protected:
uint64_t mWindowID;
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
};
/**
* nsIMediaDevice implementation.
*/
NS_IMPL_ISUPPORTS(MediaDevice, nsIMediaDevice)
MediaDevice::MediaDevice(MediaEngineSource* aSource, bool aIsVideo)
: mMediaSource(aSource->GetMediaSource())
, mSource(aSource)
, mIsVideo(aIsVideo)
{
mSource->GetName(mName);
nsCString id;
mSource->GetUUID(id);
CopyUTF8toUTF16(id, mID);
}
VideoDevice::VideoDevice(MediaEngineVideoSource* aSource)
: MediaDevice(aSource, true)
{}
/**
* Helper functions that implement the constraints algorithm from
* http://dev.w3.org/2011/webrtc/editor/getusermedia.html#methods-5
*/
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());
}
}
// Reminder: add handling for new constraints both here and in GetSources below!
uint32_t
MediaDevice::GetBestFitnessDistance(
const nsTArray<const MediaTrackConstraintSet*>& aConstraintSets)
{
nsString mediaSource;
GetMediaSource(mediaSource);
// This code is reused for audio, where the mediaSource constraint does
// not currently have a function, but because it defaults to "camera" in
// webidl, we ignore it for audio here.
if (!mediaSource.EqualsASCII("microphone")) {
for (const auto& constraint : aConstraintSets) {
if (mediaSource != constraint->mMediaSource) {
return UINT32_MAX;
}
}
}
// Forward request to underlying object to interrogate per-mode capabilities.
// Pass in device's origin-specific id for deviceId constraint comparison.
nsString id;
GetId(id);
return mSource->GetBestFitnessDistance(aConstraintSets, id);
}
AudioDevice::AudioDevice(MediaEngineAudioSource* aSource)
: MediaDevice(aSource, false)
{
mMediaSource = aSource->GetMediaSource();
}
NS_IMETHODIMP
MediaDevice::GetName(nsAString& aName)
{
aName.Assign(mName);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetType(nsAString& aType)
{
return NS_OK;
}
NS_IMETHODIMP
VideoDevice::GetType(nsAString& aType)
{
aType.AssignLiteral(MOZ_UTF16("video"));
return NS_OK;
}
NS_IMETHODIMP
AudioDevice::GetType(nsAString& aType)
{
aType.AssignLiteral(MOZ_UTF16("audio"));
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetId(nsAString& aID)
{
aID.Assign(mID);
return NS_OK;
}
void
MediaDevice::SetId(const nsAString& aID)
{
mID.Assign(aID);
}
NS_IMETHODIMP
MediaDevice::GetMediaSource(nsAString& aMediaSource)
{
if (mMediaSource == dom::MediaSourceEnum::Microphone) {
aMediaSource.Assign(NS_LITERAL_STRING("microphone"));
} else if (mMediaSource == dom::MediaSourceEnum::AudioCapture) {
aMediaSource.Assign(NS_LITERAL_STRING("audioCapture"));
} else if (mMediaSource == dom::MediaSourceEnum::Window) { // this will go away
aMediaSource.Assign(NS_LITERAL_STRING("window"));
} else { // all the rest are shared
aMediaSource.Assign(NS_ConvertUTF8toUTF16(
dom::MediaSourceEnumValues::strings[uint32_t(mMediaSource)].value));
}
return NS_OK;
}
VideoDevice::Source*
VideoDevice::GetSource()
{
return static_cast<Source*>(&*mSource);
}
AudioDevice::Source*
AudioDevice::GetSource()
{
return static_cast<Source*>(&*mSource);
}
nsresult VideoDevice::Allocate(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs) {
return GetSource()->Allocate(aConstraints, aPrefs, mID);
}
nsresult AudioDevice::Allocate(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs) {
return GetSource()->Allocate(aConstraints, aPrefs, mID);
}
nsresult VideoDevice::Restart(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs) {
return GetSource()->Restart(aConstraints, aPrefs, mID);
}
nsresult AudioDevice::Restart(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs) {
return GetSource()->Restart(aConstraints, aPrefs, mID);
}
/**
* A subclass that we only use to stash internal pointers to MediaStreamGraph objects
* that need to be cleaned up.
*/
class nsDOMUserMediaStream : public DOMLocalMediaStream
{
public:
static already_AddRefed<nsDOMUserMediaStream>
CreateSourceStream(nsIDOMWindow* aWindow,
GetUserMediaCallbackMediaStreamListener* aListener,
AudioDevice* aAudioDevice,
VideoDevice* aVideoDevice,
MediaStreamGraph* aMSG)
{
RefPtr<nsDOMUserMediaStream> stream = new nsDOMUserMediaStream(aListener,
aAudioDevice,
aVideoDevice);
stream->InitSourceStream(aWindow, aMSG);
return stream.forget();
}
nsDOMUserMediaStream(GetUserMediaCallbackMediaStreamListener* aListener,
AudioDevice *aAudioDevice,
VideoDevice *aVideoDevice) :
mListener(aListener),
mAudioDevice(aAudioDevice),
mVideoDevice(aVideoDevice)
{}
virtual ~nsDOMUserMediaStream()
{
StopImpl();
if (GetSourceStream()) {
GetSourceStream()->Destroy();
}
}
// For gUM streams, we have a trackunion which assigns TrackIDs. However, for a
// single-source trackunion like we have here, the TrackUnion will assign trackids
// that match the source's trackids, so we can avoid needing a mapping function.
// XXX This will not handle more complex cases well.
void StopTrack(TrackID aTrackID) override
{
if (GetSourceStream()) {
GetSourceStream()->EndTrack(aTrackID);
// We could override NotifyMediaStreamTrackEnded(), and maybe should, but it's
// risky to do late in a release since that will affect all track ends, and not
// just StopTrack()s.
RefPtr<dom::MediaStreamTrack> ownedTrack = FindOwnedDOMTrack(mOwnedStream, aTrackID);
if (ownedTrack) {
mListener->StopTrack(aTrackID, !!ownedTrack->AsAudioStreamTrack());
} else {
LOG(("StopTrack(%d) on non-existent track", aTrackID));
}
}
}
already_AddRefed<Promise>
ApplyConstraintsToTrack(TrackID aTrackID,
const MediaTrackConstraints& aConstraints,
ErrorResult &aRv) override
{
nsPIDOMWindow* window = static_cast<nsPIDOMWindow*>(mWindow.get());
nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(window);
RefPtr<Promise> promise = Promise::Create(go, aRv);
if (sInShutdown) {
RefPtr<MediaStreamError> error = new MediaStreamError(window,
NS_LITERAL_STRING("AbortError"),
NS_LITERAL_STRING("In shutdown"));
promise->MaybeReject(error);
return promise.forget();
}
if (!GetSourceStream()) {
RefPtr<MediaStreamError> error = new MediaStreamError(window,
NS_LITERAL_STRING("InternalError"),
NS_LITERAL_STRING("No stream."));
promise->MaybeReject(error);
return promise.forget();
}
RefPtr<dom::MediaStreamTrack> track = FindOwnedDOMTrack(mOwnedStream, aTrackID);
if (!track) {
LOG(("ApplyConstraintsToTrack(%d) on non-existent track", aTrackID));
RefPtr<MediaStreamError> error = new MediaStreamError(window,
NS_LITERAL_STRING("InternalError"),
NS_LITERAL_STRING("No track."));
promise->MaybeReject(error);
return promise.forget();
}
typedef media::Pledge<bool, MediaStreamError*> PledgeVoid;
RefPtr<PledgeVoid> p = mListener->ApplyConstraintsToTrack(window,
aTrackID, !!track->AsAudioStreamTrack(), aConstraints);
p->Then([promise](bool& aDummy) mutable {
promise->MaybeResolve(false);
}, [promise](MediaStreamError*& reason) mutable {
promise->MaybeReject(reason);
});
return promise.forget();
}
#if 0
virtual void NotifyMediaStreamTrackEnded(dom::MediaStreamTrack* aTrack)
{
TrackID trackID = aTrack->GetTrackID();
// We override this so we can also tell the backend to stop capturing if the track ends
LOG(("track %d ending, type = %s",
trackID, aTrack->AsAudioStreamTrack() ? "audio" : "video"));
MOZ_ASSERT(aTrack->AsVideoStreamTrack() || aTrack->AsAudioStreamTrack());
mListener->StopTrack(trackID, !!aTrack->AsAudioStreamTrack());
// forward to superclass
DOMLocalMediaStream::NotifyMediaStreamTrackEnded(aTrack);
}
#endif
// Allow getUserMedia to pass input data directly to PeerConnection/MediaPipeline
bool AddDirectListener(MediaStreamDirectListener *aListener) override
{
if (GetSourceStream()) {
GetSourceStream()->AddDirectListener(aListener);
return true; // application should ignore NotifyQueuedTrackData
}
return false;
}
void RemoveDirectListener(MediaStreamDirectListener *aListener) override
{
if (GetSourceStream()) {
GetSourceStream()->RemoveDirectListener(aListener);
}
}
DOMLocalMediaStream* AsDOMLocalMediaStream() override
{
return this;
}
MediaEngineSource* GetMediaEngine(TrackID aTrackID) override
{
// MediaEngine supports only one video and on video track now and TrackID is
// fixed in MediaEngine.
if (aTrackID == kVideoTrack) {
return mVideoDevice ? mVideoDevice->GetSource() : nullptr;
}
else if (aTrackID == kAudioTrack) {
return mAudioDevice ? mAudioDevice->GetSource() : nullptr;
}
return nullptr;
}
SourceMediaStream* GetSourceStream()
{
if (GetInputStream()) {
return GetInputStream()->AsSourceStream();
}
return nullptr;
}
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
RefPtr<AudioDevice> mAudioDevice; // so we can turn on AEC
RefPtr<VideoDevice> mVideoDevice;
};
void
MediaOperationTask::ReturnCallbackError(nsresult rv, const char* errorLog)
{
MM_LOG(("%s , rv=%d", errorLog, rv));
NS_DispatchToMainThread(do_AddRef(new ReleaseMediaOperationResource(mStream.forget(),
mOnTracksAvailableCallback.forget())));
nsString log;
log.AssignASCII(errorLog);
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onSuccess;
RefPtr<MediaMgrError> error = new MediaMgrError(
NS_LITERAL_STRING("InternalError"), log);
NS_DispatchToMainThread(do_AddRef(
new ErrorCallbackRunnable<nsIDOMGetUserMediaSuccessCallback>(onSuccess,
mOnFailure,
*error,
mWindowID)));
}
/**
* 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 nsRunnable
{
public:
GetUserMediaStreamRunnable(
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback>& aOnSuccess,
nsCOMPtr<nsIDOMGetUserMediaErrorCallback>& aOnFailure,
uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener* aListener,
const nsCString& aOrigin,
AudioDevice* aAudioDevice,
VideoDevice* aVideoDevice,
PeerIdentity* aPeerIdentity)
: mAudioDevice(aAudioDevice)
, mVideoDevice(aVideoDevice)
, mWindowID(aWindowID)
, mListener(aListener)
, mOrigin(aOrigin)
, mPeerIdentity(aPeerIdentity)
, mManager(MediaManager::GetInstance())
{
mOnSuccess.swap(aOnSuccess);
mOnFailure.swap(aOnFailure);
}
~GetUserMediaStreamRunnable() {}
class TracksAvailableCallback : public DOMMediaStream::OnTracksAvailableCallback
{
public:
TracksAvailableCallback(MediaManager* aManager,
nsIDOMGetUserMediaSuccessCallback* aSuccess,
uint64_t aWindowID,
DOMMediaStream* aStream)
: mWindowID(aWindowID), mOnSuccess(aSuccess), mManager(aManager),
mStream(aStream) {}
void NotifyTracksAvailable(DOMMediaStream* aStream) override
{
// We're in the main thread, so no worries here.
if (!(mManager->IsWindowStillActive(mWindowID))) {
return;
}
// Start currentTime from the point where this stream was successfully
// returned.
aStream->SetLogicalStreamStartTime(aStream->GetPlaybackStream()->GetCurrentTime());
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
LOG(("Returning success for getUserMedia()"));
mOnSuccess->OnSuccess(aStream);
}
uint64_t mWindowID;
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mOnSuccess;
RefPtr<MediaManager> mManager;
// Keep the DOMMediaStream alive until the NotifyTracksAvailable callback
// has fired, otherwise we might immediately destroy the DOMMediaStream and
// shut down the underlying MediaStream prematurely.
// This creates a cycle which is broken when NotifyTracksAvailable
// is fired (which will happen unless the browser shuts down,
// since we only add this callback when we've successfully appended
// the desired tracks in the MediaStreamGraph) or when
// DOMMediaStream::NotifyMediaStreamGraphShutdown is called.
RefPtr<DOMMediaStream> mStream;
};
NS_IMETHOD
Run()
{
MOZ_ASSERT(NS_IsMainThread());
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(mWindowID));
// We're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
StreamListeners* listeners = mManager->GetWindowListeners(mWindowID);
if (!listeners || !window || !window->GetExtantDoc()) {
// This window is no longer live. mListener has already been removed
return NS_OK;
}
MediaStreamGraph::GraphDriverType graphDriverType =
mAudioDevice ? MediaStreamGraph::AUDIO_THREAD_DRIVER
: MediaStreamGraph::SYSTEM_THREAD_DRIVER;
MediaStreamGraph* msg =
MediaStreamGraph::GetInstance(graphDriverType,
dom::AudioChannel::Normal);
RefPtr<DOMLocalMediaStream> domStream;
RefPtr<SourceMediaStream> stream;
// 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() == dom::MediaSourceEnum::AudioCapture) {
domStream = DOMLocalMediaStream::CreateAudioCaptureStream(window, msg);
// It should be possible to pipe the capture stream to anything. CORS is
// not a problem here, we got explicit user content.
domStream->SetPrincipal(window->GetExtantDoc()->NodePrincipal());
stream = msg->CreateSourceStream(nullptr); // Placeholder
msg->RegisterCaptureStreamForWindow(
mWindowID, domStream->GetInputStream()->AsProcessedStream());
window->SetAudioCapture(true);
} else {
// Normal case, connect the source stream to the track union stream to
// avoid us blocking
domStream = nsDOMUserMediaStream::CreateSourceStream(window, mListener,
mAudioDevice, mVideoDevice,
msg);
if (mAudioDevice) {
nsString audioDeviceName;
mAudioDevice->GetName(audioDeviceName);
domStream->CreateOwnDOMTrack(kAudioTrack, MediaSegment::AUDIO, audioDeviceName);
}
if (mVideoDevice) {
nsString videoDeviceName;
mVideoDevice->GetName(videoDeviceName);
domStream->CreateOwnDOMTrack(kVideoTrack, MediaSegment::VIDEO, videoDeviceName);
}
nsCOMPtr<nsIPrincipal> principal;
if (mPeerIdentity) {
principal = nsNullPrincipal::Create();
domStream->SetPeerIdentity(mPeerIdentity.forget());
} else {
principal = window->GetExtantDoc()->NodePrincipal();
}
domStream->CombineWithPrincipal(principal);
stream = domStream->GetInputStream()->AsSourceStream();
}
if (!domStream || sInShutdown) {
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure = mOnFailure.forget();
LOG(("Returning error for getUserMedia() - no stream"));
nsGlobalWindow* window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
if (window) {
RefPtr<MediaStreamError> error = new MediaStreamError(window,
NS_LITERAL_STRING("InternalError"),
sInShutdown ? NS_LITERAL_STRING("In shutdown") :
NS_LITERAL_STRING("No stream."));
onFailure->OnError(error);
}
return NS_OK;
}
// The listener was added at the beginning in an inactive state.
// Activate our listener. We'll call Start() on the source when get a callback
// that the MediaStream has started consuming. The listener is freed
// when the page is invalidated (on navigation or close).
MOZ_ASSERT(stream);
mListener->Activate(stream.forget(), mAudioDevice, mVideoDevice);
// Note: includes JS callbacks; must be released on MainThread
TracksAvailableCallback* tracksAvailableCallback =
new TracksAvailableCallback(mManager, mOnSuccess, mWindowID, domStream);
// Dispatch to the media thread to ask it to start the sources,
// because that can take a while.
// Pass ownership of domStream to the MediaOperationTask
// to ensure it's kept alive until the MediaOperationTask runs (at least).
MediaManager::PostTask(FROM_HERE,
new MediaOperationTask(MEDIA_START, mListener, domStream,
tracksAvailableCallback,
mAudioDevice, mVideoDevice,
false, mWindowID, mOnFailure.forget()));
// We won't need mOnFailure now.
mOnFailure = nullptr;
if (!MediaManager::IsPrivateBrowsing(window)) {
// Call GetOriginKey again, this time w/persist = true, to promote
// deviceIds to persistent, in case they're not already. Fire'n'forget.
RefPtr<Pledge<nsCString>> p = media::GetOriginKey(mOrigin, false, true);
}
return NS_OK;
}
private:
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mOnSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mOnFailure;
RefPtr<AudioDevice> mAudioDevice;
RefPtr<VideoDevice> mVideoDevice;
uint64_t mWindowID;
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
nsCString mOrigin;
nsAutoPtr<PeerIdentity> mPeerIdentity;
RefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
static bool
IsOn(const OwningBooleanOrMediaTrackConstraints &aUnion) {
return !aUnion.IsBoolean() || aUnion.GetAsBoolean();
}
static const MediaTrackConstraints&
GetInvariant(const OwningBooleanOrMediaTrackConstraints &aUnion) {
static const MediaTrackConstraints empty;
return aUnion.IsMediaTrackConstraints() ?
aUnion.GetAsMediaTrackConstraints() : empty;
}
// Source getter returning full list
template<class DeviceType>
static void
GetSources(MediaEngine *engine, dom::MediaSourceEnum aSrcType,
void (MediaEngine::* aEnumerate)(dom::MediaSourceEnum,
nsTArray<RefPtr<typename DeviceType::Source> >*),
nsTArray<RefPtr<DeviceType>>& aResult,
const char* media_device_name = nullptr)
{
nsTArray<RefPtr<typename DeviceType::Source>> sources;
(engine->*aEnumerate)(aSrcType, &sources);
/**
* We're allowing multiple tabs to access the same camera for parity
* with Chrome. See bug 811757 for some of the issues surrounding
* this decision. To disallow, we'd filter by IsAvailable() as we used
* to.
*/
if (media_device_name && *media_device_name) {
for (auto& source : sources) {
nsString deviceName;
source->GetName(deviceName);
if (deviceName.EqualsASCII(media_device_name)) {
aResult.AppendElement(new DeviceType(source));
break;
}
}
} else {
for (auto& source : sources) {
aResult.AppendElement(new DeviceType(source));
}
}
}
// TODO: Remove once upgraded to GCC 4.8+ on linux. Bogus error on static func:
// error: 'this' was not captured for this lambda function
static auto& MediaManager_GetInstance = MediaManager::GetInstance;
static auto& MediaManager_ToJSArray = MediaManager::ToJSArray;
static auto& MediaManager_AnonymizeDevices = MediaManager::AnonymizeDevices;
already_AddRefed<MediaManager::PledgeChar>
MediaManager::SelectSettings(
MediaStreamConstraints& aConstraints,
RefPtr<Refcountable<ScopedDeletePtr<SourceSet>>>& aSources)
{
MOZ_ASSERT(NS_IsMainThread());
RefPtr<PledgeChar> p = new PledgeChar();
uint32_t id = mOutstandingCharPledges.Append(*p);
// Algorithm accesses device capabilities code and must run on media thread.
// Modifies passed-in aSources.
MediaManager::PostTask(FROM_HERE, NewTaskFrom([id, aConstraints,
aSources]() 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<VideoDevice>> videos;
nsTArray<RefPtr<AudioDevice>> audios;
for (auto& source : sources) {
if (source->mIsVideo) {
RefPtr<VideoDevice> video = static_cast<VideoDevice*>(source.get());
videos.AppendElement(video);
} else {
RefPtr<AudioDevice> audio = static_cast<AudioDevice*>(source.get());
audios.AppendElement(audio);
}
}
sources.Clear();
const char* badConstraint = nullptr;
if (videos.Length() && IsOn(aConstraints.mVideo)) {
badConstraint = MediaConstraintsHelper::SelectSettings(
GetInvariant(aConstraints.mVideo), videos);
for (auto& video : videos) {
sources.AppendElement(video);
}
}
if (audios.Length() && IsOn(aConstraints.mAudio)) {
badConstraint = MediaConstraintsHelper::SelectSettings(
GetInvariant(aConstraints.mAudio), audios);
for (auto& audio : audios) {
sources.AppendElement(audio);
}
}
NS_DispatchToMainThread(do_AddRef(NewRunnableFrom([id, badConstraint]() mutable {
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
RefPtr<PledgeChar> p = mgr->mOutstandingCharPledges.Remove(id);
if (p) {
p->Resolve(badConstraint);
}
return NS_OK;
})));
}));
return p.forget();
}
/**
* 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 Task
{
public:
GetUserMediaTask(
const MediaStreamConstraints& aConstraints,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aOnSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aOnFailure,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs,
const nsCString& aOrigin,
MediaManager::SourceSet* aSourceSet)
: mConstraints(aConstraints)
, mOnSuccess(aOnSuccess)
, mOnFailure(aOnFailure)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mOrigin(aOrigin)
, mDeviceChosen(false)
, mSourceSet(aSourceSet)
, mManager(MediaManager::GetInstance())
{}
~GetUserMediaTask() {
}
void
Fail(const nsAString& aName, const nsAString& aMessage = EmptyString()) {
RefPtr<MediaMgrError> error = new MediaMgrError(aName, aMessage);
RefPtr<ErrorCallbackRunnable<nsIDOMGetUserMediaSuccessCallback>> runnable =
new ErrorCallbackRunnable<nsIDOMGetUserMediaSuccessCallback>(mOnSuccess,
mOnFailure,
*error,
mWindowID);
// These should be empty now
MOZ_ASSERT(!mOnSuccess);
MOZ_ASSERT(!mOnFailure);
NS_DispatchToMainThread(runnable.forget());
// Do after ErrorCallbackRunnable Run()s, as it checks active window list
NS_DispatchToMainThread(do_AddRef(new GetUserMediaListenerRemove(mWindowID, mListener)));
}
void
Run()
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(mOnSuccess);
MOZ_ASSERT(mOnFailure);
MOZ_ASSERT(mDeviceChosen);
// Allocate a video or audio device and return a MediaStream via
// a GetUserMediaStreamRunnable.
nsresult rv;
if (mAudioDevice) {
rv = mAudioDevice->Allocate(GetInvariant(mConstraints.mAudio), mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate audiosource %d",rv));
Fail(NS_LITERAL_STRING("SourceUnavailableError"),
NS_LITERAL_STRING("Failed to allocate audiosource"));
return;
}
}
if (mVideoDevice) {
rv = mVideoDevice->Allocate(GetInvariant(mConstraints.mVideo), mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate videosource %d\n",rv));
if (mAudioDevice) {
mAudioDevice->GetSource()->Deallocate();
}
Fail(NS_LITERAL_STRING("SourceUnavailableError"),
NS_LITERAL_STRING("Failed to allocate videosource"));
return;
}
}
PeerIdentity* peerIdentity = nullptr;
if (!mConstraints.mPeerIdentity.IsEmpty()) {
peerIdentity = new PeerIdentity(mConstraints.mPeerIdentity);
}
NS_DispatchToMainThread(do_AddRef(
new GetUserMediaStreamRunnable(mOnSuccess, mOnFailure, mWindowID,
mListener, mOrigin, mAudioDevice,
mVideoDevice, peerIdentity)));
MOZ_ASSERT(!mOnSuccess);
MOZ_ASSERT(!mOnFailure);
}
nsresult
Denied(const nsAString& aName,
const nsAString& aMessage = EmptyString())
{
MOZ_ASSERT(mOnSuccess);
MOZ_ASSERT(mOnFailure);
// We add a disabled listener to the StreamListeners array until accepted
// If this was the only active MediaStream, remove the window from the list.
if (NS_IsMainThread()) {
// This is safe since we're on main-thread, and the window can only
// be invalidated from the main-thread (see OnNavigation)
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onSuccess = mOnSuccess.forget();
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure = mOnFailure.forget();
nsGlobalWindow* window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
if (window) {
RefPtr<MediaStreamError> error = new MediaStreamError(window,
aName, aMessage);
onFailure->OnError(error);
}
// Should happen *after* error runs for consistency, but may not matter
RefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
} else {
// This will re-check the window being alive on main-thread
// and remove the listener on MainThread as well
Fail(aName, aMessage);
}
MOZ_ASSERT(!mOnSuccess);
MOZ_ASSERT(!mOnFailure);
return NS_OK;
}
nsresult
SetContraints(const MediaStreamConstraints& aConstraints)
{
mConstraints = aConstraints;
return NS_OK;
}
nsresult
SetAudioDevice(AudioDevice* aAudioDevice)
{
mAudioDevice = aAudioDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SetVideoDevice(VideoDevice* aVideoDevice)
{
mVideoDevice = aVideoDevice;
mDeviceChosen = true;
return NS_OK;
}
private:
MediaStreamConstraints mConstraints;
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> mOnSuccess;
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> mOnFailure;
uint64_t mWindowID;
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
RefPtr<AudioDevice> mAudioDevice;
RefPtr<VideoDevice> mVideoDevice;
MediaEnginePrefs mPrefs;
nsCString mOrigin;
bool mDeviceChosen;
public:
nsAutoPtr<MediaManager::SourceSet> mSourceSet;
private:
RefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
class GetUserMediaRunnableWrapper : public nsRunnable
{
public:
// This object must take ownership of task
GetUserMediaRunnableWrapper(GetUserMediaTask* task) :
mTask(task) {
}
~GetUserMediaRunnableWrapper() {
}
NS_IMETHOD Run() {
mTask->Run();
return NS_OK;
}
private:
nsAutoPtr<GetUserMediaTask> mTask;
};
#endif
/**
* EnumerateRawDevices - Enumerate a list of audio & video devices that
* satisfy passed-in constraints. List contains raw id's.
*/
already_AddRefed<MediaManager::PledgeSourceSet>
MediaManager::EnumerateRawDevices(uint64_t aWindowId,
MediaSourceEnum aVideoType,
MediaSourceEnum aAudioType,
bool aFake, bool aFakeTracks)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aVideoType != MediaSourceEnum::Other ||
aAudioType != MediaSourceEnum::Other);
RefPtr<PledgeSourceSet> p = new PledgeSourceSet();
uint32_t id = mOutstandingPledges.Append(*p);
nsAdoptingCString audioLoopDev, videoLoopDev;
if (!aFake) {
// Fake stream not requested. The entire device stack is available.
// Loop in loopback devices if they are set, and their respective type is
// requested. This is currently used for automated media tests only.
if (aVideoType == MediaSourceEnum::Camera) {
videoLoopDev = Preferences::GetCString("media.video_loopback_dev");
}
if (aAudioType == MediaSourceEnum::Microphone) {
audioLoopDev = Preferences::GetCString("media.audio_loopback_dev");
}
}
if (!aFake) {
// Fake tracks only make sense when we have a fake stream.
aFakeTracks = false;
}
MediaManager::PostTask(FROM_HERE, NewTaskFrom([id, aWindowId, audioLoopDev,
videoLoopDev, aVideoType,
aAudioType, aFake,
aFakeTracks]() mutable {
// Only enumerate what's asked for, and only fake cams and mics.
bool hasVideo = aVideoType != MediaSourceEnum::Other;
bool hasAudio = aAudioType != MediaSourceEnum::Other;
bool fakeCams = aFake && aVideoType == MediaSourceEnum::Camera;
bool fakeMics = aFake && aAudioType == MediaSourceEnum::Microphone;
RefPtr<MediaEngine> fakeBackend, realBackend;
if (fakeCams || fakeMics) {
fakeBackend = new MediaEngineDefault(aFakeTracks);
}
if ((!fakeCams && hasVideo) || (!fakeMics && hasAudio)) {
RefPtr<MediaManager> manager = MediaManager_GetInstance();
realBackend = manager->GetBackend(aWindowId);
}
ScopedDeletePtr<SourceSet> result(new SourceSet);
if (hasVideo) {
nsTArray<RefPtr<VideoDevice>> videos;
GetSources(fakeCams? fakeBackend : realBackend, aVideoType,
&MediaEngine::EnumerateVideoDevices, videos, videoLoopDev);
for (auto& source : videos) {
result->AppendElement(source);
}
}
if (hasAudio) {
nsTArray<RefPtr<AudioDevice>> audios;
GetSources(fakeMics? fakeBackend : realBackend, aAudioType,
&MediaEngine::EnumerateAudioDevices, audios, audioLoopDev);
for (auto& source : audios) {
result->AppendElement(source);
}
}
SourceSet* handoff = result.forget();
NS_DispatchToMainThread(do_AddRef(NewRunnableFrom([id, handoff]() mutable {
ScopedDeletePtr<SourceSet> result(handoff); // grab result
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
if (!mgr) {
return NS_OK;
}
RefPtr<PledgeSourceSet> p = mgr->mOutstandingPledges.Remove(id);
if (p) {
p->Resolve(result.forget());
}
return NS_OK;
})));
}));
return p.forget();
}
MediaManager::MediaManager()
: mMediaThread(nullptr)
, mBackend(nullptr) {
mPrefs.mFreq = 1000; // 1KHz test tone
mPrefs.mWidth = 0; // adaptive default
mPrefs.mHeight = 0; // adaptive default
mPrefs.mFPS = MediaEngine::DEFAULT_VIDEO_FPS;
mPrefs.mMinFPS = MediaEngine::DEFAULT_VIDEO_MIN_FPS;
mPrefs.mAecOn = false;
mPrefs.mAgcOn = false;
mPrefs.mNoiseOn = false;
#ifdef MOZ_WEBRTC
mPrefs.mAec = webrtc::kEcUnchanged;
mPrefs.mAgc = webrtc::kAgcUnchanged;
mPrefs.mNoise = webrtc::kNsUnchanged;
#else
mPrefs.mAec = 0;
mPrefs.mAgc = 0;
mPrefs.mNoise = 0;
#endif
mPrefs.mPlayoutDelay = 0;
mPrefs.mFullDuplex = false;
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService("@mozilla.org/preferences-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(prefs);
if (branch) {
GetPrefs(branch, nullptr);
}
}
LOG(("%s: default prefs: %dx%d @%dfps (min %d), %dHz test tones, aec: %s,"
"agc: %s, noise: %s, aec level: %d, agc level: %d, noise level: %d,"
"playout delay: %d, %sfull_duplex", __FUNCTION__, mPrefs.mWidth, mPrefs.mHeight,
mPrefs.mFPS, mPrefs.mMinFPS, mPrefs.mFreq, mPrefs.mAecOn ? "on" : "off",
mPrefs.mAgcOn ? "on": "off", mPrefs.mNoiseOn ? "on": "off", mPrefs.mAec,
mPrefs.mAgc, mPrefs.mNoise, mPrefs.mPlayoutDelay, mPrefs.mFullDuplex ? "" : "not "));
}
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
// 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());
#ifdef DEBUG
static int timesCreated = 0;
timesCreated++;
MOZ_ASSERT(timesCreated == 1);
#endif
sSingleton = new MediaManager();
sSingleton->mMediaThread = new base::Thread("MediaManager");
base::Thread::Options options;
#if defined(_WIN32)
options.message_loop_type = MessageLoop::TYPE_MOZILLA_NONMAINUITHREAD;
#else
options.message_loop_type = MessageLoop::TYPE_MOZILLA_NONMAINTHREAD;
#endif
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:privileged:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:deny", false);
obs->AddObserver(sSingleton, "getUserMedia:revoke", false);
obs->AddObserver(sSingleton, "phone-state-changed", false);
}
// else MediaManager won't work properly and will leak (see bug 837874)
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->AddObserver("media.navigator.video.default_width", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_height", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_fps", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_minfps", sSingleton, false);
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.getusermedia.playout_delay", sSingleton, false);
#endif
}
// Prepare async shutdown
nsCOMPtr<nsIAsyncShutdownClient> shutdownPhase = GetShutdownPhase();
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 = shutdownPhase->AddBlocker(sSingleton->mShutdownBlocker,
NS_LITERAL_STRING(__FILE__),
__LINE__,
NS_LITERAL_STRING("Media shutdown"));
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
#ifdef MOZ_B2G
// Init MediaPermissionManager before sending out any permission requests.
(void) MediaPermissionManager::GetInstance();
#endif //MOZ_B2G
}
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>(true);
}
return mNonE10sParent;
}
/* static */ void
MediaManager::StartupInit()
{
#ifdef WIN32
if (IsVistaOrLater() && !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(const tracked_objects::Location& from_here, Task* task)
{
if (sInShutdown) {
// Can't safely delete task here since it may have items with specific
// thread-release requirements.
return;
}
NS_ASSERTION(Get(), "MediaManager singleton?");
NS_ASSERTION(Get()->mMediaThread, "No thread yet");
Get()->mMediaThread->message_loop()->PostTask(from_here, task);
}
/* static */ nsresult
MediaManager::NotifyRecordingStatusChange(nsPIDOMWindow* aWindow,
const nsString& aMsg,
const bool& aIsAudio,
const bool& aIsVideo)
{
NS_ENSURE_ARG(aWindow);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!obs) {
NS_WARNING("Could not get the Observer service for GetUserMedia recording notification.");
return NS_ERROR_FAILURE;
}
RefPtr<nsHashPropertyBag> props = new nsHashPropertyBag();
props->SetPropertyAsBool(NS_LITERAL_STRING("isAudio"), aIsAudio);
props->SetPropertyAsBool(NS_LITERAL_STRING("isVideo"), aIsVideo);
bool isApp = false;
nsString requestURL;
if (nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell()) {
nsresult rv = docShell->GetIsApp(&isApp);
NS_ENSURE_SUCCESS(rv, rv);
if (isApp) {
rv = docShell->GetAppManifestURL(requestURL);
NS_ENSURE_SUCCESS(rv, rv);
}
}
if (!isApp) {
nsCString pageURL;
nsCOMPtr<nsIURI> docURI = aWindow->GetDocumentURI();
NS_ENSURE_TRUE(docURI, NS_ERROR_FAILURE);
nsresult rv = docURI->GetSpec(pageURL);
NS_ENSURE_SUCCESS(rv, rv);
requestURL = NS_ConvertUTF8toUTF16(pageURL);
}
props->SetPropertyAsBool(NS_LITERAL_STRING("isApp"), isApp);
props->SetPropertyAsAString(NS_LITERAL_STRING("requestURL"), requestURL);
obs->NotifyObservers(static_cast<nsIPropertyBag2*>(props),
"recording-device-events",
aMsg.get());
// Forward recording events to parent process.
// The events are gathered in chrome process and used for recording indicator
if (!XRE_IsParentProcess()) {
Unused <<
dom::ContentChild::GetSingleton()->SendRecordingDeviceEvents(aMsg,
requestURL,
aIsAudio,
aIsVideo);
}
return NS_OK;
}
bool MediaManager::IsPrivileged()
{
bool permission = nsContentUtils::IsCallerChrome();
// Developer preference for turning off permission check.
if (Preferences::GetBool("media.navigator.permission.disabled", false)) {
permission = true;
}
return permission;
}
bool MediaManager::IsLoop(nsIURI* aDocURI)
{
MOZ_ASSERT(aDocURI);
nsCOMPtr<nsIURI> loopURI;
nsresult rv = NS_NewURI(getter_AddRefs(loopURI), "about:loopconversation");
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
bool result = false;
rv = aDocURI->EqualsExceptRef(loopURI, &result);
NS_ENSURE_SUCCESS(rv, false);
return result;
}
bool MediaManager::IsPrivateBrowsing(nsPIDOMWindow *window)
{
nsCOMPtr<nsIDocument> doc = window->GetDoc();
nsCOMPtr<nsILoadContext> loadContext = doc->GetLoadContext();
return loadContext && loadContext->UsePrivateBrowsing();
}
nsresult MediaManager::GenerateUUID(nsAString& aResult)
{
nsresult rv;
nsCOMPtr<nsIUUIDGenerator> uuidgen =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Generate a call ID.
nsID id;
rv = uuidgen->GenerateUUIDInPlace(&id);
NS_ENSURE_SUCCESS(rv, rv);
char buffer[NSID_LENGTH];
id.ToProvidedString(buffer);
aResult.Assign(NS_ConvertUTF8toUTF16(buffer));
return NS_OK;
}
enum class GetUserMediaSecurityState {
Other = 0,
HTTPS = 1,
File = 2,
App = 3,
Localhost = 4,
Loop = 5,
Privileged = 6
};
/**
* The entry point for this file. A call from Navigator::mozGetUserMedia
* will end up here. MediaManager is a singleton that is responsible
* for handling all incoming getUserMedia calls from every window.
*/
nsresult
MediaManager::GetUserMedia(nsPIDOMWindow* aWindow,
const MediaStreamConstraints& aConstraintsPassedIn,
nsIDOMGetUserMediaSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnFailure)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aWindow);
MOZ_ASSERT(aOnFailure);
MOZ_ASSERT(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure(aOnFailure);
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)) {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("NotSupportedError"),
NS_LITERAL_STRING("audio and/or video is required"));
onFailure->OnError(error);
return NS_OK;
}
if (sInShutdown) {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("AbortError"),
NS_LITERAL_STRING("In shutdown"));
onFailure->OnError(error);
return NS_OK;
}
// Determine permissions early (while we still have a stack).
nsIURI* docURI = aWindow->GetDocumentURI();
if (!docURI) {
return NS_ERROR_UNEXPECTED;
}
bool loop = IsLoop(docURI);
bool privileged = loop || IsPrivileged();
bool isHTTPS = false;
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 IsURIPotentiallyTrustworthy())
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 (loop) {
Telemetry::Accumulate(Telemetry::WEBRTC_GET_USER_MEDIA_SECURE_ORIGIN,
(uint32_t) GetUserMediaSecurityState::Loop);
} else 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);
}
nsCString origin;
rv = nsPrincipal::GetOriginForURI(docURI, origin);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!Preferences::GetBool("media.navigator.video.enabled", true)) {
c.mVideo.SetAsBoolean() = false;
}
MediaSourceEnum videoType = dom::MediaSourceEnum::Other; // none
MediaSourceEnum audioType = dom::MediaSourceEnum::Other; // none
if (c.mVideo.IsMediaTrackConstraints()) {
auto& vc = c.mVideo.GetAsMediaTrackConstraints();
videoType = StringToEnum(dom::MediaSourceEnumValues::strings,
vc.mMediaSource,
dom::MediaSourceEnum::Other);
Telemetry::Accumulate(loop ? Telemetry::LOOP_GET_USER_MEDIA_TYPE :
Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t) videoType);
switch (videoType) {
case dom::MediaSourceEnum::Camera:
break;
case dom::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()) {
nsPIDOMWindow *outer = aWindow->GetOuterWindow();
vc.mBrowserWindow.Construct(outer->WindowID());
}
MOZ_FALLTHROUGH;
case dom::MediaSourceEnum::Screen:
case dom::MediaSourceEnum::Application:
case dom::MediaSourceEnum::Window:
// Deny screensharing request if support is disabled, or
// the requesting document is not from a host on the whitelist, or
// we're on Mac OSX 10.6 and WinXP until proved that they work
if (!Preferences::GetBool(((videoType == dom::MediaSourceEnum::Browser)?
"media.getusermedia.browser.enabled" :
"media.getusermedia.screensharing.enabled"),
false) ||
#if defined(XP_MACOSX) || defined(XP_WIN)
(
// Allow tab sharing for all platforms including XP and OSX 10.6
(videoType != dom::MediaSourceEnum::Browser) &&
!Preferences::GetBool("media.getusermedia.screensharing.allow_on_old_platforms",
false) &&
#if defined(XP_MACOSX)
!nsCocoaFeatures::OnLionOrLater()
#endif
#if defined (XP_WIN)
!IsVistaOrLater()
#endif
) ||
#endif
(!privileged && !HostHasPermission(*docURI))) {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("SecurityError"));
onFailure->OnError(error);
return NS_OK;
}
break;
case dom::MediaSourceEnum::Microphone:
case dom::MediaSourceEnum::Other:
default: {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("OverconstrainedError"),
NS_LITERAL_STRING(""),
NS_LITERAL_STRING("mediaSource"));
onFailure->OnError(error);
return NS_OK;
}
}
if (vc.mAdvanced.WasPassed() && videoType != dom::MediaSourceEnum::Camera) {
// iterate through advanced, forcing all unset mediaSources to match "root"
const char *unset = EnumToASCII(dom::MediaSourceEnumValues::strings,
dom::MediaSourceEnum::Camera);
for (MediaTrackConstraintSet& cs : vc.mAdvanced.Value()) {
if (cs.mMediaSource.EqualsASCII(unset)) {
cs.mMediaSource = vc.mMediaSource;
}
}
}
if (!privileged) {
// 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;
}
}
}
}
// For all but tab sharing, Loop needs to prompt as we are using the
// permission menu for selection of the device currently. For tab sharing,
// Loop has implicit permissions within Firefox, as it is built-in,
// and will manage the active tab and provide appropriate UI.
if (loop && (videoType == dom::MediaSourceEnum::Window ||
videoType == dom::MediaSourceEnum::Application ||
videoType == dom::MediaSourceEnum::Screen)) {
privileged = false;
}
} else if (IsOn(c.mVideo)) {
videoType = dom::MediaSourceEnum::Camera;
}
if (c.mAudio.IsMediaTrackConstraints()) {
auto& ac = c.mAudio.GetAsMediaTrackConstraints();
audioType = StringToEnum(dom::MediaSourceEnumValues::strings,
ac.mMediaSource,
dom::MediaSourceEnum::Other);
// Work around WebIDL default since spec uses same dictionary w/audio & video.
if (audioType == dom::MediaSourceEnum::Camera) {
audioType = dom::MediaSourceEnum::Microphone;
ac.mMediaSource.AssignASCII(EnumToASCII(dom::MediaSourceEnumValues::strings,
audioType));
}
Telemetry::Accumulate(loop ? Telemetry::LOOP_GET_USER_MEDIA_TYPE :
Telemetry::WEBRTC_GET_USER_MEDIA_TYPE,
(uint32_t) audioType);
switch (audioType) {
case dom::MediaSourceEnum::Microphone:
break;
case dom::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")) {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("SecurityError"));
onFailure->OnError(error);
return NS_OK;
}
break;
case dom::MediaSourceEnum::Other:
default: {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow,
NS_LITERAL_STRING("OverconstrainedError"),
NS_LITERAL_STRING(""),
NS_LITERAL_STRING("mediaSource"));
onFailure->OnError(error);
return NS_OK;
}
}
if (ac.mAdvanced.WasPassed()) {
// iterate through advanced, forcing all unset mediaSources to match "root"
const char *unset = EnumToASCII(dom::MediaSourceEnumValues::strings,
dom::MediaSourceEnum::Camera);
for (MediaTrackConstraintSet& cs : ac.mAdvanced.Value()) {
if (cs.mMediaSource.EqualsASCII(unset)) {
cs.mMediaSource = ac.mMediaSource;
}
}
}
} else if (IsOn(c.mAudio)) {
audioType = dom::MediaSourceEnum::Microphone;
}
StreamListeners* listeners = AddWindowID(windowID);
// Create a disabled listener to act as a placeholder
RefPtr<GetUserMediaCallbackMediaStreamListener> listener =
new GetUserMediaCallbackMediaStreamListener(mMediaThread, windowID);
// No need for locking because we always do this in the main thread.
listeners->AppendElement(listener);
if (!privileged) {
// Check if this site has had persistent permissions denied.
nsCOMPtr<nsIPermissionManager> permManager =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t audioPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mAudio)) {
rv = permManager->TestExactPermissionFromPrincipal(
aWindow->GetExtantDoc()->NodePrincipal(), "microphone", &audioPerm);
NS_ENSURE_SUCCESS(rv, rv);
}
uint32_t videoPerm = nsIPermissionManager::UNKNOWN_ACTION;
if (IsOn(c.mVideo)) {
rv = permManager->TestExactPermissionFromPrincipal(
aWindow->GetExtantDoc()->NodePrincipal(), "camera", &videoPerm);
NS_ENSURE_SUCCESS(rv, rv);
}
if ((!IsOn(c.mAudio) || audioPerm == nsIPermissionManager::DENY_ACTION) &&
(!IsOn(c.mVideo) || videoPerm == nsIPermissionManager::DENY_ACTION)) {
RefPtr<MediaStreamError> error =
new MediaStreamError(aWindow, NS_LITERAL_STRING("SecurityError"));
onFailure->OnError(error);
RemoveFromWindowList(windowID, listener);
return NS_OK;
}
}
#if defined(MOZ_B2G_CAMERA) && defined(MOZ_WIDGET_GONK)
if (mCameraManager == nullptr) {
mCameraManager = nsDOMCameraManager::CreateInstance(aWindow);
}
#endif
// Get list of all devices, with origin-specific device ids.
MediaEnginePrefs prefs = mPrefs;
nsString callID;
rv = GenerateUUID(callID);
NS_ENSURE_SUCCESS(rv, rv);
bool fake = c.mFake.WasPassed()? c.mFake.Value() :
Preferences::GetBool("media.navigator.streams.fake");
bool fakeTracks = c.mFakeTracks.WasPassed()? c.mFakeTracks.Value() : false;
bool askPermission = !privileged &&
(!fake || Preferences::GetBool("media.navigator.permission.fake"));
RefPtr<PledgeSourceSet> p = EnumerateDevicesImpl(windowID, videoType,
audioType, fake,
fakeTracks);
p->Then([this, onSuccess, onFailure, windowID, c, listener, askPermission,
prefs, isHTTPS, callID, origin](SourceSet*& aDevices) mutable {
RefPtr<Refcountable<ScopedDeletePtr<SourceSet>>> devices(
new Refcountable<ScopedDeletePtr<SourceSet>>(aDevices)); // grab result
// Ensure that the captured 'this' pointer and our windowID are still good.
if (!MediaManager::Exists() ||
!nsGlobalWindow::GetInnerWindowWithId(windowID)) {
return;
}
// Apply any constraints. This modifies the passed-in list.
RefPtr<PledgeChar> p2 = SelectSettings(c, devices);
p2->Then([this, onSuccess, onFailure, windowID, c,
listener, askPermission, prefs, isHTTPS,
callID, origin, devices](const char*& badConstraint) mutable {
// Ensure that the captured 'this' pointer and our windowID are still good.
RefPtr<nsPIDOMWindow> window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(windowID));
if (!MediaManager::Exists() || !window) {
return;
}
if (badConstraint) {
nsString constraint;
constraint.AssignASCII(badConstraint);
RefPtr<MediaStreamError> error =
new MediaStreamError(window,
NS_LITERAL_STRING("OverconstrainedError"),
NS_LITERAL_STRING(""),
constraint);
onFailure->OnError(error);
return;
}
if (!(*devices)->Length()) {
RefPtr<MediaStreamError> error =
new MediaStreamError(window, NS_LITERAL_STRING("NotFoundError"));
onFailure->OnError(error);
return;
}
nsCOMPtr<nsISupportsArray> devicesCopy; // before we give up devices below
if (!askPermission) {
nsresult rv = NS_NewISupportsArray(getter_AddRefs(devicesCopy));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
for (auto& device : **devices) {
rv = devicesCopy->AppendElement(device);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
}
}
// Pass callbacks and MediaStreamListener along to GetUserMediaTask.
nsAutoPtr<GetUserMediaTask> task (new GetUserMediaTask(c, onSuccess.forget(),
onFailure.forget(),
windowID, listener,
prefs, origin,
devices->forget()));
// Store the task w/callbacks.
mActiveCallbacks.Put(callID, task.forget());
// Add a WindowID cross-reference so OnNavigation can tear things down
nsTArray<nsString>* array;
if (!mCallIds.Get(windowID, &array)) {
array = new nsTArray<nsString>();
mCallIds.Put(windowID, array);
}
array->AppendElement(callID);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!askPermission) {
obs->NotifyObservers(devicesCopy, "getUserMedia:privileged:allow",
callID.BeginReading());
} else {
RefPtr<GetUserMediaRequest> req =
new GetUserMediaRequest(window, callID, c, isHTTPS);
obs->NotifyObservers(req, "getUserMedia:request", nullptr);
}
#ifdef MOZ_WEBRTC
EnableWebRtcLog();
#endif
}, [onFailure](MediaStreamError*& reason) mutable {
onFailure->OnError(reason);
});
}, [onFailure](MediaStreamError*& reason) mutable {
onFailure->OnError(reason);
});
return NS_OK;
}
/* static */ void
MediaManager::AnonymizeDevices(SourceSet& aDevices, const nsACString& aOriginKey)
{
if (!aOriginKey.IsEmpty()) {
for (auto& device : aDevices) {
nsString id;
device->GetId(id);
AnonymizeId(id, aOriginKey);
device->SetId(id);
}
}
}
/* 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(SourceSet& aDevices)
{
MOZ_ASSERT(NS_IsMainThread());
RefPtr<nsVariantCC> var = new 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();
}
already_AddRefed<MediaManager::PledgeSourceSet>
MediaManager::EnumerateDevicesImpl(uint64_t aWindowId,
MediaSourceEnum aVideoType,
MediaSourceEnum aAudioType,
bool aFake, bool aFakeTracks)
{
MOZ_ASSERT(NS_IsMainThread());
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowId));
// This function returns a pledge, a promise-like object with the future result
RefPtr<PledgeSourceSet> pledge = new PledgeSourceSet();
uint32_t id = mOutstandingPledges.Append(*pledge);
// 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.
bool privateBrowsing = IsPrivateBrowsing(window);
nsCString origin;
nsPrincipal::GetOriginForURI(window->GetDocumentURI(), origin);
bool persist = IsActivelyCapturingOrHasAPermission(aWindowId);
// GetOriginKey is an async API that returns a pledge (a promise-like
// pattern). We use .Then() to pass in a lambda to run back on this same
// thread later once GetOriginKey resolves. Needed variables are "captured"
// (passed by value) safely into the lambda.
RefPtr<Pledge<nsCString>> p = media::GetOriginKey(origin, privateBrowsing,
persist);
p->Then([id, aWindowId, aVideoType, aAudioType,
aFake, aFakeTracks](const nsCString& aOriginKey) mutable {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
RefPtr<PledgeSourceSet> p = mgr->EnumerateRawDevices(aWindowId,
aVideoType, aAudioType,
aFake, aFakeTracks);
p->Then([id, aWindowId, aOriginKey](SourceSet*& aDevices) mutable {
ScopedDeletePtr<SourceSet> devices(aDevices); // secondary result
// Only run if window is still on our active list.
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
if (!mgr) {
return NS_OK;
}
RefPtr<PledgeSourceSet> p = mgr->mOutstandingPledges.Remove(id);
if (!p || !mgr->IsWindowStillActive(aWindowId)) {
return NS_OK;
}
MediaManager_AnonymizeDevices(*devices, aOriginKey);
p->Resolve(devices.forget());
return NS_OK;
});
});
return pledge.forget();
}
nsresult
MediaManager::EnumerateDevices(nsPIDOMWindow* aWindow,
nsIGetUserMediaDevicesSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnFailure)
{
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_TRUE(!sInShutdown, NS_ERROR_FAILURE);
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure(aOnFailure);
uint64_t windowId = aWindow->WindowID();
StreamListeners* listeners = AddWindowID(windowId);
// Create a disabled listener to act as a placeholder
RefPtr<GetUserMediaCallbackMediaStreamListener> listener =
new GetUserMediaCallbackMediaStreamListener(mMediaThread, windowId);
// No need for locking because we always do this in the main thread.
listeners->AppendElement(listener);
bool fake = Preferences::GetBool("media.navigator.streams.fake");
RefPtr<PledgeSourceSet> p = EnumerateDevicesImpl(windowId,
dom::MediaSourceEnum::Camera,
dom::MediaSourceEnum::Microphone,
fake);
p->Then([onSuccess, windowId, listener](SourceSet*& aDevices) mutable {
ScopedDeletePtr<SourceSet> devices(aDevices); // grab result
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
mgr->RemoveFromWindowList(windowId, listener);
nsCOMPtr<nsIWritableVariant> array = MediaManager_ToJSArray(*devices);
onSuccess->OnSuccess(array);
}, [onFailure, windowId, listener](MediaStreamError*& reason) mutable {
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
mgr->RemoveFromWindowList(windowId, listener);
onFailure->OnError(reason);
});
return NS_OK;
}
/*
* GetUserMediaDevices - called by the UI-part of getUserMedia from chrome JS.
*/
nsresult
MediaManager::GetUserMediaDevices(nsPIDOMWindow* aWindow,
const MediaStreamConstraints& aConstraints,
nsIGetUserMediaDevicesSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnFailure,
uint64_t aWindowId,
const nsAString& aCallID)
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onFailure(aOnFailure);
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) {
GetUserMediaTask* task;
if (!aCallID.Length() || aCallID == callID) {
if (mActiveCallbacks.Get(callID, &task)) {
nsCOMPtr<nsIWritableVariant> array = MediaManager_ToJSArray(*task->mSourceSet);
onSuccess->OnSuccess(array);
return NS_OK;
}
}
}
return NS_ERROR_UNEXPECTED;
}
MediaEngine*
MediaManager::GetBackend(uint64_t aWindowId)
{
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(!sInShutdown); // we should never create a new backend in shutdown
#if defined(MOZ_WEBRTC)
mBackend = new MediaEngineWebRTC(mPrefs);
#else
mBackend = new MediaEngineDefault();
#endif
}
return mBackend;
}
static void
StopSharingCallback(MediaManager *aThis,
uint64_t aWindowID,
StreamListeners *aListeners,
void *aData)
{
MOZ_ASSERT(NS_IsMainThread());
if (aListeners) {
auto length = aListeners->Length();
for (size_t i = 0; i < length; ++i) {
GetUserMediaCallbackMediaStreamListener *listener = aListeners->ElementAt(i);
if (listener->Stream()) { // aka HasBeenActivate()ed
listener->Invalidate();
}
listener->Remove();
listener->StopSharing();
}
aListeners->Clear();
aThis->RemoveWindowID(aWindowID);
}
}
void
MediaManager::OnNavigation(uint64_t aWindowID)
{
MOZ_ASSERT(NS_IsMainThread());
LOG(("OnNavigation for %llu", aWindowID));
// Invalidate 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
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowID));
if (window) {
IterateWindowListeners(window, StopSharingCallback, nullptr);
} else {
RemoveWindowID(aWindowID);
}
}
StreamListeners*
MediaManager::AddWindowID(uint64_t aWindowId)
{
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)
StreamListeners* listeners = GetActiveWindows()->Get(aWindowId);
if (!listeners) {
listeners = new StreamListeners;
GetActiveWindows()->Put(aWindowId, listeners);
}
return listeners;
}
void
MediaManager::RemoveWindowID(uint64_t aWindowId)
{
mActiveWindows.Remove(aWindowId);
// get outer windowID
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowId));
if (!window) {
LOG(("No inner window for %llu", aWindowId));
return;
}
nsPIDOMWindow *outer = window->GetOuterWindow();
if (!outer) {
LOG(("No outer window for inner %llu", aWindowId));
return;
}
uint64_t outerID = outer->WindowID();
// Notify the UI that this window no longer has gUM active
char windowBuffer[32];
PR_snprintf(windowBuffer, sizeof(windowBuffer), "%llu", outerID);
nsString data = NS_ConvertUTF8toUTF16(windowBuffer);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyObservers(nullptr, "recording-window-ended", data.get());
LOG(("Sent recording-window-ended for window %llu (outer %llu)",
aWindowId, outerID));
}
void
MediaManager::RemoveFromWindowList(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
{
MOZ_ASSERT(NS_IsMainThread());
// This is defined as safe on an inactive GUMCMSListener
aListener->Remove(); // really queues the remove
StreamListeners* listeners = GetWindowListeners(aWindowID);
if (!listeners) {
return;
}
listeners->RemoveElement(aListener);
if (listeners->Length() == 0) {
RemoveWindowID(aWindowID);
// listeners has been deleted here
}
}
void
MediaManager::GetPref(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, int32_t *aVal)
{
int32_t temp;
if (aData == nullptr || strcmp(aPref,aData) == 0) {
if (NS_SUCCEEDED(aBranch->GetIntPref(aPref, &temp))) {
*aVal = temp;
}
}
}
void
MediaManager::GetPrefBool(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, bool *aVal)
{
bool temp;
if (aData == nullptr || strcmp(aPref,aData) == 0) {
if (NS_SUCCEEDED(aBranch->GetBoolPref(aPref, &temp))) {
*aVal = temp;
}
}
}
void
MediaManager::GetPrefs(nsIPrefBranch *aBranch, const char *aData)
{
GetPref(aBranch, "media.navigator.video.default_width", aData, &mPrefs.mWidth);
GetPref(aBranch, "media.navigator.video.default_height", aData, &mPrefs.mHeight);
GetPref(aBranch, "media.navigator.video.default_fps", aData, &mPrefs.mFPS);
GetPref(aBranch, "media.navigator.video.default_minfps", aData, &mPrefs.mMinFPS);
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);
GetPref(aBranch, "media.getusermedia.playout_delay", aData, &mPrefs.mPlayoutDelay);
#endif
GetPrefBool(aBranch, "media.navigator.audio.full_duplex", aData, &mPrefs.mFullDuplex);
}
void
MediaManager::Shutdown()
{
MOZ_ASSERT(NS_IsMainThread());
if (sInShutdown) {
return;
}
sInShutdown = true;
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:revoke");
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->RemoveObserver("media.navigator.video.default_width", this);
prefs->RemoveObserver("media.navigator.video.default_height", this);
prefs->RemoveObserver("media.navigator.video.default_fps", this);
prefs->RemoveObserver("media.navigator.video.default_minfps", this);
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.getusermedia.playout_delay", this);
#endif
prefs->RemoveObserver("media.navigator.audio.full_duplex", this);
}
// Close off any remaining active windows.
GetActiveWindows()->Clear();
mActiveCallbacks.Clear();
mCallIds.Clear();
// 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 Task
{
public:
ShutdownTask(MediaManager* aManager,
nsRunnable* aReply)
: mManager(aManager)
, mReply(aReply) {}
private:
void
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
}
}
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"));
}
}
RefPtr<MediaManager> mManager;
RefPtr<nsRunnable> 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
RefPtr<MediaManager> that(sSingleton);
// Release the backend (and call Shutdown()) from within the MediaManager thread
// Don't use MediaManager::PostTask() because we're sInShutdown=true here!
mMediaThread->message_loop()->PostTask(FROM_HERE, new ShutdownTask(this,
media::NewRunnableFrom([this, that]() mutable {
LOG(("MediaManager shutdown lambda running, releasing MediaManager singleton and thread"));
if (mMediaThread) {
mMediaThread->Stop();
}
// Remove async shutdown blocker
nsCOMPtr<nsIAsyncShutdownClient> shutdownPhase = GetShutdownPhase();
shutdownPhase->RemoveBlocker(sSingleton->mShutdownBlocker);
// we hold a ref to 'that' which is the same as sSingleton
sSingleton = nullptr;
return NS_OK;
})));
}
nsresult
MediaManager::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData)
{
MOZ_ASSERT(NS_IsMainThread());
if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsCOMPtr<nsIPrefBranch> branch( do_QueryInterface(aSubject) );
if (branch) {
GetPrefs(branch,NS_ConvertUTF16toUTF8(aData).get());
LOG(("%s: %dx%d @%dfps (min %d)", __FUNCTION__,
mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mMinFPS));
}
} else if (!strcmp(aTopic, "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:privileged:allow") ||
!strcmp(aTopic, "getUserMedia:response:allow")) {
nsString key(aData);
nsAutoPtr<GetUserMediaTask> task;
mActiveCallbacks.RemoveAndForget(key, task);
if (!task) {
return NS_OK;
}
if (aSubject) {
// A particular device or devices were chosen by the user.
// NOTE: does not allow setting a device to null; assumes nullptr
nsCOMPtr<nsISupportsArray> array(do_QueryInterface(aSubject));
MOZ_ASSERT(array);
uint32_t len = 0;
array->Count(&len);
if (!len) {
// neither audio nor video were selected
task->Denied(NS_LITERAL_STRING("SecurityError"));
return NS_OK;
}
bool videoFound = false, audioFound = false;
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> supports;
array->GetElementAt(i,getter_AddRefs(supports));
nsCOMPtr<nsIMediaDevice> device(do_QueryInterface(supports));
MOZ_ASSERT(device); // shouldn't be returning anything else...
if (device) {
nsString type;
device->GetType(type);
if (type.EqualsLiteral("video")) {
if (!videoFound) {
task->SetVideoDevice(static_cast<VideoDevice*>(device.get()));
videoFound = true;
}
} else if (type.EqualsLiteral("audio")) {
if (!audioFound) {
task->SetAudioDevice(static_cast<AudioDevice*>(device.get()));
audioFound = true;
}
} else {
NS_WARNING("Unknown device type in getUserMedia");
}
}
}
}
if (sInShutdown) {
return task->Denied(NS_LITERAL_STRING("In shutdown"));
}
// Reuse the same thread to save memory.
MediaManager::PostTask(FROM_HERE, task.forget());
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:response:deny")) {
nsString errorMessage(NS_LITERAL_STRING("SecurityError"));
if (aSubject) {
nsCOMPtr<nsISupportsString> msg(do_QueryInterface(aSubject));
MOZ_ASSERT(msg);
msg->GetData(errorMessage);
if (errorMessage.IsEmpty())
errorMessage.AssignLiteral(MOZ_UTF16("InternalError"));
}
nsString key(aData);
nsAutoPtr<GetUserMediaTask> task;
mActiveCallbacks.RemoveAndForget(key, task);
if (task) {
task->Denied(errorMessage);
}
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 %llu", 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 %llu", windowID));
OnNavigation(windowID);
}
}
return NS_OK;
}
#ifdef MOZ_WIDGET_GONK
else if (!strcmp(aTopic, "phone-state-changed")) {
nsString state(aData);
nsresult rv;
uint32_t phoneState = state.ToInteger(&rv);
if (NS_SUCCEEDED(rv) && phoneState == nsIAudioManager::PHONE_STATE_IN_CALL) {
StopMediaStreams();
}
return NS_OK;
}
#endif
return NS_OK;
}
nsresult
MediaManager::GetActiveMediaCaptureWindows(nsISupportsArray** aArray)
{
MOZ_ASSERT(aArray);
nsISupportsArray* array;
nsresult rv = NS_NewISupportsArray(&array); // AddRefs
if (NS_FAILED(rv)) {
return rv;
}
for (auto iter = mActiveWindows.Iter(); !iter.Done(); iter.Next()) {
const uint64_t& id = iter.Key();
StreamListeners* listeners = iter.UserData();
nsPIDOMWindow* window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(id));
MOZ_ASSERT(window);
if (!window) {
continue;
}
// mActiveWindows contains both windows that have requested device
// access and windows that are currently capturing media. We want
// to return only the latter. See bug 975177.
bool capturing = false;
if (listeners) {
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; ++i) {
RefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
if (listener->CapturingVideo() || listener->CapturingAudio() ||
listener->CapturingScreen() || listener->CapturingWindow() ||
listener->CapturingApplication()) {
capturing = true;
break;
}
}
}
if (capturing) {
array->AppendElement(window);
}
}
*aArray = array;
return NS_OK;
}
// XXX flags might be better...
struct CaptureWindowStateData {
bool *mVideo;
bool *mAudio;
bool *mScreenShare;
bool *mWindowShare;
bool *mAppShare;
bool *mBrowserShare;
};
static void
CaptureWindowStateCallback(MediaManager *aThis,
uint64_t aWindowID,
StreamListeners *aListeners,
void *aData)
{
struct CaptureWindowStateData *data = (struct CaptureWindowStateData *) aData;
if (aListeners) {
auto length = aListeners->Length();
for (size_t i = 0; i < length; ++i) {
GetUserMediaCallbackMediaStreamListener *listener = aListeners->ElementAt(i);
if (listener->CapturingVideo()) {
*data->mVideo = true;
}
if (listener->CapturingAudio()) {
*data->mAudio = true;
}
if (listener->CapturingScreen()) {
*data->mScreenShare = true;
}
if (listener->CapturingWindow()) {
*data->mWindowShare = true;
}
if (listener->CapturingApplication()) {
*data->mAppShare = true;
}
if (listener->CapturingBrowser()) {
*data->mBrowserShare = true;
}
}
}
}
NS_IMETHODIMP
MediaManager::MediaCaptureWindowState(nsIDOMWindow* aWindow, bool* aVideo,
bool* aAudio, bool *aScreenShare,
bool* aWindowShare, bool *aAppShare,
bool *aBrowserShare)
{
MOZ_ASSERT(NS_IsMainThread());
struct CaptureWindowStateData data;
data.mVideo = aVideo;
data.mAudio = aAudio;
data.mScreenShare = aScreenShare;
data.mWindowShare = aWindowShare;
data.mAppShare = aAppShare;
data.mBrowserShare = aBrowserShare;
*aVideo = false;
*aAudio = false;
*aScreenShare = false;
*aWindowShare = false;
*aAppShare = false;
*aBrowserShare = false;
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
if (piWin) {
IterateWindowListeners(piWin, CaptureWindowStateCallback, &data);
}
#ifdef DEBUG
LOG(("%s: window %lld capturing %s %s %s %s %s %s", __FUNCTION__, piWin ? piWin->WindowID() : -1,
*aVideo ? "video" : "", *aAudio ? "audio" : "",
*aScreenShare ? "screenshare" : "", *aWindowShare ? "windowshare" : "",
*aAppShare ? "appshare" : "", *aBrowserShare ? "browsershare" : ""));
#endif
return NS_OK;
}
NS_IMETHODIMP
MediaManager::SanitizeDeviceIds(int64_t aSinceWhen)
{
MOZ_ASSERT(NS_IsMainThread());
LOG(("%s: sinceWhen = %llu", __FUNCTION__, aSinceWhen));
media::SanitizeOriginKeys(aSinceWhen, false); // we fire and forget
return NS_OK;
}
static void
StopScreensharingCallback(MediaManager *aThis,
uint64_t aWindowID,
StreamListeners *aListeners,
void *aData)
{
if (aListeners) {
auto length = aListeners->Length();
for (size_t i = 0; i < length; ++i) {
aListeners->ElementAt(i)->StopSharing();
}
}
}
void
MediaManager::StopScreensharing(uint64_t aWindowID)
{
// We need to stop window/screensharing for all streams in all innerwindows that
// correspond to that outerwindow.
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowID));
if (!window) {
return;
}
IterateWindowListeners(window, &StopScreensharingCallback, nullptr);
}
// lets us do all sorts of things to the listeners
void
MediaManager::IterateWindowListeners(nsPIDOMWindow *aWindow,
WindowListenerCallback aCallback,
void *aData)
{
// Iterate the docshell tree to find all the child windows, and for each
// invoke the callback
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
if (piWin) {
if (piWin->IsInnerWindow() || piWin->GetCurrentInnerWindow()) {
uint64_t windowID;
if (piWin->IsInnerWindow()) {
windowID = piWin->WindowID();
} else {
windowID = piWin->GetCurrentInnerWindow()->WindowID();
}
StreamListeners* listeners = GetActiveWindows()->Get(windowID);
// pass listeners so it can modify/delete the list
(*aCallback)(this, windowID, listeners, aData);
}
// iterate any children of *this* window (iframes, etc)
nsCOMPtr<nsIDocShell> docShell = piWin->GetDocShell();
if (docShell) {
int32_t i, count;
docShell->GetChildCount(&count);
for (i = 0; i < count; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
docShell->GetChildAt(i, getter_AddRefs(item));
nsCOMPtr<nsPIDOMWindow> win = item ? item->GetWindow() : nullptr;
if (win) {
IterateWindowListeners(win, aCallback, aData);
}
}
}
}
}
void
MediaManager::StopMediaStreams()
{
nsCOMPtr<nsISupportsArray> array;
GetActiveMediaCaptureWindows(getter_AddRefs(array));
uint32_t len;
array->Count(&len);
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> window;
array->GetElementAt(i, getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(window));
if (win) {
OnNavigation(win->WindowID());
}
}
}
bool
MediaManager::IsActivelyCapturingOrHasAPermission(uint64_t aWindowId)
{
// Does page currently have a gUM stream active?
nsCOMPtr<nsISupportsArray> array;
GetActiveMediaCaptureWindows(getter_AddRefs(array));
uint32_t len;
array->Count(&len);
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> window;
array->GetElementAt(i, getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(window));
if (win && win->WindowID() == aWindowId) {
return true;
}
}
// Or are persistent permissions (audio or video) granted?
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowId));
if (NS_WARN_IF(!window)) {
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;
{
auto* principal = window->GetExtantDoc()->NodePrincipal();
rv = mgr->TestExactPermissionFromPrincipal(principal, "microphone", &audio);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
rv = mgr->TestExactPermissionFromPrincipal(principal, "camera", &video);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
return audio == nsIPermissionManager::ALLOW_ACTION ||
video == nsIPermissionManager::ALLOW_ACTION;
}
void
GetUserMediaCallbackMediaStreamListener::Invalidate()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread");
if (mStopped) {
return;
}
// We can't take a chance on blocking here, so proxy this to another
// thread.
// Pass a ref to us (which is threadsafe) so it can query us for the
// source stream info.
MediaManager::PostTask(FROM_HERE,
new MediaOperationTask(MEDIA_STOP,
this, nullptr, nullptr,
!mAudioStopped ? mAudioDevice.get() : nullptr,
!mVideoStopped ? mVideoDevice.get() : nullptr,
mFinished, mWindowID, nullptr));
mStopped = mAudioStopped = mVideoStopped = true;
}
// Doesn't kill audio
void
GetUserMediaCallbackMediaStreamListener::StopSharing()
{
MOZ_ASSERT(NS_IsMainThread());
if (mVideoDevice && !mStopped &&
(mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Screen ||
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Application ||
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Window)) {
// Stop the whole stream if there's no audio; just the video track if we have both
if (!mAudioDevice) {
Invalidate();
} else if (!mVideoStopped) {
MediaManager::PostTask(FROM_HERE,
new MediaOperationTask(MEDIA_STOP_TRACK,
this, nullptr, nullptr,
nullptr, mVideoDevice,
mFinished, mWindowID, nullptr));
mVideoStopped = true;
}
} else if (mAudioDevice &&
mAudioDevice->GetMediaSource() == dom::MediaSourceEnum::AudioCapture) {
nsCOMPtr<nsPIDOMWindow> window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
MOZ_ASSERT(window);
window->SetAudioCapture(false);
MediaStreamGraph* graph =
MediaStreamGraph::GetInstance(MediaStreamGraph::AUDIO_THREAD_DRIVER,
dom::AudioChannel::Normal);
graph->UnregisterCaptureStreamForWindow(mWindowID);
mStream->Destroy();
}
}
// ApplyConstraints for track
already_AddRefed<GetUserMediaCallbackMediaStreamListener::PledgeVoid>
GetUserMediaCallbackMediaStreamListener::ApplyConstraintsToTrack(
nsPIDOMWindow* aWindow,
TrackID aTrackID,
bool aIsAudio,
const MediaTrackConstraints& aConstraints)
{
MOZ_ASSERT(NS_IsMainThread());
RefPtr<PledgeVoid> p = new PledgeVoid();
if (!(((aIsAudio && mAudioDevice) ||
(!aIsAudio && mVideoDevice)) && !mStopped))
{
LOG(("gUM track %d applyConstraints, but we don't have type %s",
aTrackID, aIsAudio ? "audio" : "video"));
p->Resolve(false);
return p.forget();
}
// XXX to support multiple tracks of a type in a stream, this should key off
// the TrackID and not just the type
RefPtr<AudioDevice> audioDevice = aIsAudio ? mAudioDevice.get() : nullptr;
RefPtr<VideoDevice> videoDevice = !aIsAudio ? mVideoDevice.get() : nullptr;
RefPtr<MediaManager> mgr = MediaManager::GetInstance();
uint32_t id = mgr->mOutstandingVoidPledges.Append(*p);
uint64_t windowId = aWindow->WindowID();
MediaManager::PostTask(FROM_HERE, NewTaskFrom([id, windowId,
audioDevice, videoDevice,
aConstraints]() mutable {
MOZ_ASSERT(MediaManager::IsInMediaThread());
RefPtr<MediaManager> mgr = MediaManager::GetInstance();
const char* badConstraint = nullptr;
nsresult rv = NS_OK;
if (audioDevice) {
rv = audioDevice->Restart(aConstraints, mgr->mPrefs);
if (rv == NS_ERROR_NOT_AVAILABLE) {
nsTArray<RefPtr<AudioDevice>> audios;
audios.AppendElement(audioDevice);
badConstraint = MediaConstraintsHelper::SelectSettings(aConstraints,
audios);
}
} else {
rv = videoDevice->Restart(aConstraints, mgr->mPrefs);
if (rv == NS_ERROR_NOT_AVAILABLE) {
nsTArray<RefPtr<VideoDevice>> videos;
videos.AppendElement(videoDevice);
badConstraint = MediaConstraintsHelper::SelectSettings(aConstraints,
videos);
}
}
NS_DispatchToMainThread(do_AddRef(NewRunnableFrom([id, windowId, rv,
badConstraint]() mutable {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<MediaManager> mgr = MediaManager_GetInstance();
if (!mgr) {
return NS_OK;
}
RefPtr<PledgeVoid> p = mgr->mOutstandingVoidPledges.Remove(id);
if (p) {
if (NS_SUCCEEDED(rv)) {
p->Resolve(false);
} else {
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(windowId));
if (window) {
if (rv == NS_ERROR_NOT_AVAILABLE) {
nsString constraint;
constraint.AssignASCII(badConstraint);
RefPtr<MediaStreamError> error =
new MediaStreamError(window,
NS_LITERAL_STRING("OverconstrainedError"),
NS_LITERAL_STRING(""),
constraint);
p->Reject(error);
} else {
RefPtr<MediaStreamError> error =
new MediaStreamError(window,
NS_LITERAL_STRING("InternalError"));
p->Reject(error);
}
}
}
}
return NS_OK;
})));
}));
return p.forget();
}
// Stop backend for track
void
GetUserMediaCallbackMediaStreamListener::StopTrack(TrackID aTrackID, bool aIsAudio)
{
MOZ_ASSERT(NS_IsMainThread());
if (((aIsAudio && mAudioDevice) ||
(!aIsAudio && mVideoDevice)) && !mStopped)
{
// XXX to support multiple tracks of a type in a stream, this should key off
// the TrackID and not just the type
bool stopAudio = aIsAudio && !mAudioStopped;
bool stopVideo = !aIsAudio && !mVideoStopped;
MediaManager::PostTask(FROM_HERE,
new MediaOperationTask(MEDIA_STOP_TRACK,
this, nullptr, nullptr,
stopAudio ? mAudioDevice.get() : nullptr,
stopVideo ? mVideoDevice.get() : nullptr,
mFinished, mWindowID, nullptr));
mAudioStopped |= stopAudio;
mVideoStopped |= stopVideo;
} else {
LOG(("gUM track %d ended, but we don't have type %s",
aTrackID, aIsAudio ? "audio" : "video"));
}
}
void
GetUserMediaCallbackMediaStreamListener::NotifyFinished()
{
MOZ_ASSERT(NS_IsMainThread());
mFinished = true;
Invalidate(); // we know it's been activated
RefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, this);
}
// Called from the MediaStreamGraph thread
void
GetUserMediaCallbackMediaStreamListener::NotifyDirectListeners(MediaStreamGraph* aGraph,
bool aHasListeners)
{
MediaManager::PostTask(FROM_HERE,
new MediaOperationTask(MEDIA_DIRECT_LISTENERS,
this, nullptr, nullptr,
mAudioDevice, mVideoDevice,
aHasListeners, mWindowID, nullptr));
}
// this can be in response to our own RemoveListener() (via ::Remove()), or
// because the DOM GC'd the DOMLocalMediaStream/etc we're attached to.
void
GetUserMediaCallbackMediaStreamListener::NotifyRemoved()
{
MOZ_ASSERT(NS_IsMainThread());
MM_LOG(("Listener removed by DOM Destroy(), mFinished = %d", (int) mFinished));
mRemoved = true;
if (!mFinished) {
NotifyFinished();
}
}
NS_IMETHODIMP
GetUserMediaNotificationEvent::Run()
{
MOZ_ASSERT(NS_IsMainThread());
// Make sure mStream is cleared and our reference to the DOMMediaStream
// is dropped on the main thread, no matter what happens in this method.
// Otherwise this object might be destroyed off the main thread,
// releasing DOMMediaStream off the main thread, which is not allowed.
RefPtr<DOMMediaStream> stream = mStream.forget();
nsString msg;
switch (mStatus) {
case STARTING:
msg = NS_LITERAL_STRING("starting");
stream->OnTracksAvailable(mOnTracksAvailableCallback.forget());
break;
case STOPPING:
case STOPPED_TRACK:
msg = NS_LITERAL_STRING("shutdown");
break;
}
nsCOMPtr<nsPIDOMWindow> window = nsGlobalWindow::GetInnerWindowWithId(mWindowID);
NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
return MediaManager::NotifyRecordingStatusChange(window, msg, mIsAudio, mIsVideo);
}
} // namespace mozilla
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