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gecko-dev/dom/media/MediaManager.h

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/* 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/. */
#ifndef MOZILLA_MEDIAMANAGER_H
#define MOZILLA_MEDIAMANAGER_H
#include "MediaEngine.h"
#include "mozilla/Services.h"
#include "mozilla/unused.h"
#include "nsIMediaManager.h"
#include "nsHashKeys.h"
#include "nsGlobalWindow.h"
#include "nsClassHashtable.h"
#include "nsRefPtrHashtable.h"
#include "nsIObserver.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"
#include "nsPIDOMWindow.h"
#include "nsIDOMNavigatorUserMedia.h"
#include "nsXULAppAPI.h"
#include "mozilla/Attributes.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/dom/MediaStreamBinding.h"
#include "mozilla/dom/MediaStreamTrackBinding.h"
#include "mozilla/dom/MediaStreamError.h"
#include "mozilla/media/MediaChild.h"
#include "mozilla/media/MediaParent.h"
#include "mozilla/Logging.h"
#include "mozilla/UniquePtr.h"
#include "DOMMediaStream.h"
#ifdef MOZ_WEBRTC
#include "mtransport/runnable_utils.h"
#endif
// Note, these suck in Windows headers, unfortunately.
#include "base/thread.h"
#include "base/task.h"
#ifdef MOZ_WIDGET_GONK
#include "DOMCameraManager.h"
#endif
namespace mozilla {
namespace dom {
struct MediaStreamConstraints;
struct MediaTrackConstraints;
struct MediaTrackConstraintSet;
} // namespace dom
extern LogModule* GetMediaManagerLog();
#define MM_LOG(msg) MOZ_LOG(GetMediaManagerLog(), mozilla::LogLevel::Debug, msg)
class MediaDevice : public nsIMediaDevice
{
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIMEDIADEVICE
void SetId(const nsAString& aID);
virtual uint32_t GetBestFitnessDistance(
const nsTArray<const dom::MediaTrackConstraintSet*>& aConstraintSets);
protected:
virtual ~MediaDevice() {}
explicit MediaDevice(MediaEngineSource* aSource, bool aIsVideo);
static uint32_t FitnessDistance(nsString aN,
const dom::OwningStringOrStringSequenceOrConstrainDOMStringParameters& aConstraint);
private:
static bool StringsContain(const dom::OwningStringOrStringSequence& aStrings,
nsString aN);
static uint32_t FitnessDistance(nsString aN,
const dom::ConstrainDOMStringParameters& aParams);
protected:
nsString mName;
nsString mID;
dom::MediaSourceEnum mMediaSource;
RefPtr<MediaEngineSource> mSource;
public:
dom::MediaSourceEnum GetMediaSource() {
return mMediaSource;
}
bool mIsVideo;
};
class VideoDevice : public MediaDevice
{
public:
typedef MediaEngineVideoSource Source;
explicit VideoDevice(Source* aSource);
NS_IMETHOD GetType(nsAString& aType);
Source* GetSource();
nsresult Allocate(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs,
const nsACString& aOrigin);
nsresult Restart(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs);
};
class AudioDevice : public MediaDevice
{
public:
typedef MediaEngineAudioSource Source;
explicit AudioDevice(Source* aSource);
NS_IMETHOD GetType(nsAString& aType);
Source* GetSource();
nsresult Allocate(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs,
const nsACString& aOrigin);
nsresult Restart(const dom::MediaTrackConstraints &aConstraints,
const MediaEnginePrefs &aPrefs);
};
/**
* This class is an implementation of MediaStreamListener. This is used
* to Start() and Stop() the underlying MediaEngineSource when MediaStreams
* are assigned and deassigned in content.
*/
class GetUserMediaCallbackMediaStreamListener : public MediaStreamListener
{
public:
// Create in an inactive state
GetUserMediaCallbackMediaStreamListener(base::Thread *aThread,
uint64_t aWindowID,
const PrincipalHandle& aPrincipalHandle)
: mMediaThread(aThread)
, mWindowID(aWindowID)
, mPrincipalHandle(aPrincipalHandle)
, mStopped(false)
, mFinished(false)
, mRemoved(false)
, mAudioStopped(false)
, mVideoStopped(false) {}
~GetUserMediaCallbackMediaStreamListener()
{
Unused << mMediaThread;
// It's OK to release mStream on any thread; they have thread-safe
// refcounts.
}
void Activate(already_AddRefed<SourceMediaStream> aStream,
AudioDevice* aAudioDevice,
VideoDevice* aVideoDevice)
{
MOZ_ASSERT(NS_IsMainThread());
mStream = aStream;
mAudioDevice = aAudioDevice;
mVideoDevice = aVideoDevice;
mStream->AddListener(this);
}
MediaStream *Stream() // Can be used to test if Activate was called
{
return mStream;
}
SourceMediaStream *GetSourceStream()
{
NS_ASSERTION(mStream,"Getting stream from never-activated GUMCMSListener");
if (!mStream) {
return nullptr;
}
return mStream->AsSourceStream();
}
void StopSharing();
void StopTrack(TrackID aID);
typedef media::Pledge<bool, dom::MediaStreamError*> PledgeVoid;
already_AddRefed<PledgeVoid>
ApplyConstraintsToTrack(nsPIDOMWindowInner* aWindow,
TrackID aID,
const dom::MediaTrackConstraints& aConstraints);
// mVideo/AudioDevice are set by Activate(), so we assume they're capturing
// if set and represent a real capture device.
bool CapturingVideo()
{
MOZ_ASSERT(NS_IsMainThread());
return mVideoDevice && !mStopped &&
!mVideoDevice->GetSource()->IsAvailable() &&
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Camera &&
(!mVideoDevice->GetSource()->IsFake() ||
Preferences::GetBool("media.navigator.permission.fake"));
}
bool CapturingAudio()
{
MOZ_ASSERT(NS_IsMainThread());
return mAudioDevice && !mStopped &&
!mAudioDevice->GetSource()->IsAvailable() &&
(!mAudioDevice->GetSource()->IsFake() ||
Preferences::GetBool("media.navigator.permission.fake"));
}
bool CapturingScreen()
{
MOZ_ASSERT(NS_IsMainThread());
return mVideoDevice && !mStopped &&
!mVideoDevice->GetSource()->IsAvailable() &&
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Screen;
}
bool CapturingWindow()
{
MOZ_ASSERT(NS_IsMainThread());
return mVideoDevice && !mStopped &&
!mVideoDevice->GetSource()->IsAvailable() &&
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Window;
}
bool CapturingApplication()
{
MOZ_ASSERT(NS_IsMainThread());
return mVideoDevice && !mStopped &&
!mVideoDevice->GetSource()->IsAvailable() &&
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Application;
}
bool CapturingBrowser()
{
MOZ_ASSERT(NS_IsMainThread());
return mVideoDevice && !mStopped &&
mVideoDevice->GetSource()->IsAvailable() &&
mVideoDevice->GetMediaSource() == dom::MediaSourceEnum::Browser;
}
// implement in .cpp to avoid circular dependency with MediaOperationTask
// Can be invoked from EITHER MainThread or MSG thread
void Stop();
void
AudioConfig(bool aEchoOn, uint32_t aEcho,
bool aAgcOn, uint32_t aAGC,
bool aNoiseOn, uint32_t aNoise,
int32_t aPlayoutDelay);
void
Remove()
{
MOZ_ASSERT(NS_IsMainThread());
// allow calling even if inactive (!mStream) for easier cleanup
// Caller holds strong reference to us, so no death grip required
if (mStream && !mRemoved) {
MM_LOG(("Listener removed on purpose, mFinished = %d", (int) mFinished));
mRemoved = true; // RemoveListener is async, avoid races
// If it's destroyed, don't call - listener will be removed and we'll be notified!
if (!mStream->IsDestroyed()) {
mStream->RemoveListener(this);
}
}
}
// Proxy NotifyPull() to sources
void
NotifyPull(MediaStreamGraph* aGraph, StreamTime aDesiredTime) override
{
// Currently audio sources ignore NotifyPull, but they could
// watch it especially for fake audio.
if (mAudioDevice) {
mAudioDevice->GetSource()->NotifyPull(aGraph, mStream, kAudioTrack,
aDesiredTime, mPrincipalHandle);
}
if (mVideoDevice) {
mVideoDevice->GetSource()->NotifyPull(aGraph, mStream, kVideoTrack,
aDesiredTime, mPrincipalHandle);
}
}
void
NotifyEvent(MediaStreamGraph* aGraph,
MediaStreamListener::MediaStreamGraphEvent aEvent) override
{
switch (aEvent) {
case EVENT_FINISHED:
NS_DispatchToMainThread(
NewRunnableMethod(this, &GetUserMediaCallbackMediaStreamListener::NotifyFinished));
break;
case EVENT_REMOVED:
NS_DispatchToMainThread(
NewRunnableMethod(this, &GetUserMediaCallbackMediaStreamListener::NotifyRemoved));
break;
case EVENT_HAS_DIRECT_LISTENERS:
NotifyDirectListeners(aGraph, true);
break;
case EVENT_HAS_NO_DIRECT_LISTENERS:
NotifyDirectListeners(aGraph, false);
break;
default:
break;
}
}
void
NotifyFinished();
void
NotifyRemoved();
void
NotifyDirectListeners(MediaStreamGraph* aGraph, bool aHasListeners);
PrincipalHandle GetPrincipalHandle() const { return mPrincipalHandle; }
private:
// Set at construction
base::Thread* mMediaThread;
uint64_t mWindowID;
const PrincipalHandle mPrincipalHandle;
// true after this listener has sent MEDIA_STOP. MainThread only.
bool mStopped;
// true after the stream this listener is listening to has finished in the
// MediaStreamGraph. MainThread only.
bool mFinished;
// true after this listener has been removed from its MediaStream.
// MainThread only.
bool mRemoved;
// true if we have sent MEDIA_STOP or MEDIA_STOP_TRACK for mAudioDevice.
// MainThread only.
bool mAudioStopped;
// true if we have sent MEDIA_STOP or MEDIA_STOP_TRACK for mVideoDevice.
// MainThread only.
bool mVideoStopped;
// Set at Activate on MainThread
// Accessed from MediaStreamGraph thread, MediaManager thread, and MainThread
// No locking needed as they're only addrefed except on the MediaManager thread
RefPtr<AudioDevice> mAudioDevice; // threadsafe refcnt
RefPtr<VideoDevice> mVideoDevice; // threadsafe refcnt
RefPtr<SourceMediaStream> mStream; // threadsafe refcnt
};
class GetUserMediaNotificationEvent: public Runnable
{
public:
enum GetUserMediaStatus {
STARTING,
STOPPING,
STOPPED_TRACK,
};
GetUserMediaNotificationEvent(GetUserMediaCallbackMediaStreamListener* aListener,
GetUserMediaStatus aStatus,
bool aIsAudio, bool aIsVideo, uint64_t aWindowID)
: mListener(aListener) , mStatus(aStatus) , mIsAudio(aIsAudio)
, mIsVideo(aIsVideo), mWindowID(aWindowID) {}
GetUserMediaNotificationEvent(GetUserMediaStatus aStatus,
already_AddRefed<DOMMediaStream> aStream,
OnTracksAvailableCallback* aOnTracksAvailableCallback,
bool aIsAudio, bool aIsVideo, uint64_t aWindowID,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError)
: mStream(aStream), mOnTracksAvailableCallback(aOnTracksAvailableCallback),
mStatus(aStatus), mIsAudio(aIsAudio), mIsVideo(aIsVideo), mWindowID(aWindowID),
mOnFailure(aError) {}
virtual ~GetUserMediaNotificationEvent()
{
}
NS_IMETHOD Run() override;
protected:
RefPtr<GetUserMediaCallbackMediaStreamListener> mListener; // threadsafe
RefPtr<DOMMediaStream> mStream;
nsAutoPtr<OnTracksAvailableCallback> mOnTracksAvailableCallback;
GetUserMediaStatus mStatus;
bool mIsAudio;
bool mIsVideo;
uint64_t mWindowID;
RefPtr<nsIDOMGetUserMediaErrorCallback> mOnFailure;
};
typedef enum {
MEDIA_START,
MEDIA_STOP,
MEDIA_STOP_TRACK,
MEDIA_DIRECT_LISTENERS,
} MediaOperation;
class MediaManager;
class GetUserMediaTask;
class ReleaseMediaOperationResource : public Runnable
{
public:
ReleaseMediaOperationResource(already_AddRefed<DOMMediaStream> aStream,
OnTracksAvailableCallback* aOnTracksAvailableCallback):
mStream(aStream),
mOnTracksAvailableCallback(aOnTracksAvailableCallback) {}
NS_IMETHOD Run() override {return NS_OK;}
private:
RefPtr<DOMMediaStream> mStream;
nsAutoPtr<OnTracksAvailableCallback> mOnTracksAvailableCallback;
};
typedef nsTArray<RefPtr<GetUserMediaCallbackMediaStreamListener> > StreamListeners;
typedef nsClassHashtable<nsUint64HashKey, StreamListeners> WindowTable;
// we could add MediaManager if needed
typedef void (*WindowListenerCallback)(MediaManager *aThis,
uint64_t aWindowID,
StreamListeners *aListeners,
void *aData);
class MediaManager final : public nsIMediaManagerService,
public nsIObserver
{
friend GetUserMediaCallbackMediaStreamListener;
public:
static already_AddRefed<MediaManager> GetInstance();
// NOTE: never Dispatch(....,NS_DISPATCH_SYNC) to the MediaManager
// thread from the MainThread, as we NS_DISPATCH_SYNC to MainThread
// from MediaManager thread.
static MediaManager* Get();
static MediaManager* GetIfExists();
static void StartupInit();
static void PostTask(already_AddRefed<Runnable> task);
#ifdef DEBUG
static bool IsInMediaThread();
#endif
static bool Exists()
{
return !!sSingleton;
}
static nsresult NotifyRecordingStatusChange(nsPIDOMWindowInner* aWindow,
const nsString& aMsg,
const bool& aIsAudio,
const bool& aIsVideo);
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
NS_DECL_NSIMEDIAMANAGERSERVICE
media::Parent<media::NonE10s>* GetNonE10sParent();
MediaEngine* GetBackend(uint64_t aWindowId = 0);
StreamListeners *GetWindowListeners(uint64_t aWindowId) {
MOZ_ASSERT(NS_IsMainThread());
return mActiveWindows.Get(aWindowId);
}
void RemoveWindowID(uint64_t aWindowId);
bool IsWindowStillActive(uint64_t aWindowId) {
return !!GetWindowListeners(aWindowId);
}
// Note: also calls aListener->Remove(), even if inactive
void RemoveFromWindowList(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener);
nsresult GetUserMedia(
nsPIDOMWindowInner* aWindow,
const dom::MediaStreamConstraints& aConstraints,
nsIDOMGetUserMediaSuccessCallback* onSuccess,
nsIDOMGetUserMediaErrorCallback* onError);
nsresult GetUserMediaDevices(nsPIDOMWindowInner* aWindow,
const dom::MediaStreamConstraints& aConstraints,
nsIGetUserMediaDevicesSuccessCallback* onSuccess,
nsIDOMGetUserMediaErrorCallback* onError,
uint64_t aInnerWindowID = 0,
const nsAString& aCallID = nsString());
nsresult EnumerateDevices(nsPIDOMWindowInner* aWindow,
nsIGetUserMediaDevicesSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnFailure);
nsresult EnumerateDevices(nsPIDOMWindowInner* aWindow, dom::Promise& aPromise);
void OnNavigation(uint64_t aWindowID);
bool IsActivelyCapturingOrHasAPermission(uint64_t aWindowId);
MediaEnginePrefs mPrefs;
typedef nsTArray<RefPtr<MediaDevice>> SourceSet;
static bool IsPrivateBrowsing(nsPIDOMWindowInner* window);
private:
typedef media::Pledge<SourceSet*, dom::MediaStreamError*> PledgeSourceSet;
typedef media::Pledge<const char*, dom::MediaStreamError*> PledgeChar;
static bool IsPrivileged();
static bool IsLoop(nsIURI* aDocURI);
static nsresult GenerateUUID(nsAString& aResult);
static nsresult AnonymizeId(nsAString& aId, const nsACString& aOriginKey);
public: // TODO: make private once we upgrade to GCC 4.8+ on linux.
static void AnonymizeDevices(SourceSet& aDevices, const nsACString& aOriginKey);
static already_AddRefed<nsIWritableVariant> ToJSArray(SourceSet& aDevices);
private:
already_AddRefed<PledgeSourceSet>
EnumerateRawDevices(uint64_t aWindowId,
dom::MediaSourceEnum aVideoType,
dom::MediaSourceEnum aAudioType,
bool aFake, bool aFakeTracks);
already_AddRefed<PledgeSourceSet>
EnumerateDevicesImpl(uint64_t aWindowId,
dom::MediaSourceEnum aVideoSrcType,
dom::MediaSourceEnum aAudioSrcType,
bool aFake = false, bool aFakeTracks = false);
already_AddRefed<PledgeChar>
SelectSettings(
dom::MediaStreamConstraints& aConstraints,
RefPtr<media::Refcountable<UniquePtr<SourceSet>>>& aSources);
StreamListeners* AddWindowID(uint64_t aWindowId);
WindowTable *GetActiveWindows() {
MOZ_ASSERT(NS_IsMainThread());
return &mActiveWindows;
}
void GetPref(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, int32_t *aVal);
void GetPrefBool(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, bool *aVal);
void GetPrefs(nsIPrefBranch *aBranch, const char *aData);
// Make private because we want only one instance of this class
MediaManager();
~MediaManager() {}
void Shutdown();
void StopScreensharing(uint64_t aWindowID);
void IterateWindowListeners(nsPIDOMWindowInner *aWindow,
WindowListenerCallback aCallback,
void *aData);
void StopMediaStreams();
// ONLY access from MainThread so we don't need to lock
WindowTable mActiveWindows;
nsRefPtrHashtable<nsStringHashKey, GetUserMediaTask> mActiveCallbacks;
nsClassHashtable<nsUint64HashKey, nsTArray<nsString>> mCallIds;
// Always exists
nsAutoPtr<base::Thread> mMediaThread;
nsCOMPtr<nsIAsyncShutdownBlocker> mShutdownBlocker;
// ONLY accessed from MediaManagerThread
RefPtr<MediaEngine> mBackend;
static StaticRefPtr<MediaManager> sSingleton;
media::CoatCheck<PledgeSourceSet> mOutstandingPledges;
media::CoatCheck<PledgeChar> mOutstandingCharPledges;
media::CoatCheck<GetUserMediaCallbackMediaStreamListener::PledgeVoid> mOutstandingVoidPledges;
#if defined(MOZ_B2G_CAMERA) && defined(MOZ_WIDGET_GONK)
RefPtr<nsDOMCameraManager> mCameraManager;
#endif
public:
media::CoatCheck<media::Pledge<nsCString>> mGetOriginKeyPledges;
UniquePtr<media::Parent<media::NonE10s>> mNonE10sParent;
};
} // namespace mozilla
#endif // MOZILLA_MEDIAMANAGER_H
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