[c8bea5]: dom / media / MediaManager.cpp Maximize Restore History

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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/. */
#include "MediaManager.h"
#include "MediaStreamGraph.h"
#include "nsIDOMFile.h"
#include "nsIEventTarget.h"
#include "nsIUUIDGenerator.h"
#include "nsIScriptGlobalObject.h"
#include "nsIPopupWindowManager.h"
#include "nsISupportsArray.h"
#include "nsIDocShell.h"
// For PR_snprintf
#include "prprf.h"
#include "nsJSUtils.h"
#include "nsDOMFile.h"
#include "nsGlobalWindow.h"
#include "mozilla/Preferences.h"
/* Using WebRTC backend on Desktops (Mac, Windows, Linux), otherwise default */
#include "MediaEngineDefault.h"
#if defined(MOZ_WEBRTC)
#include "MediaEngineWebRTC.h"
#endif
namespace mozilla {
#ifdef LOG
#undef LOG
#endif
#ifdef PR_LOGGING
PRLogModuleInfo*
GetMediaManagerLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("MediaManager");
return sLog;
}
#define LOG(msg) PR_LOG(GetMediaManagerLog(), PR_LOG_DEBUG, msg)
#else
#define LOG(msg)
#endif
/**
* Send an error back to content. The error is the form a string.
* Do this only on the main thread. The success callback is also passed here
* so it can be released correctly.
*/
class ErrorCallbackRunnable : public nsRunnable
{
public:
ErrorCallbackRunnable(
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
const nsAString& aErrorMsg, uint64_t aWindowID)
: mSuccess(aSuccess)
, mError(aError)
, mErrorMsg(aErrorMsg)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance()) {}
NS_IMETHOD
Run()
{
// Only run if the window is still active.
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success(mSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
if (!(mManager->IsWindowStillActive(mWindowID))) {
return NS_OK;
}
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
error->OnError(mErrorMsg);
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
const nsString mErrorMsg;
uint64_t mWindowID;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Invoke the "onSuccess" callback in content. The callback will take a
* DOMBlob in the case of {picture:true}, and a MediaStream in the case of
* {audio:true} or {video:true}. There is a constructor available for each
* form. Do this only on the main thread.
*/
class SuccessCallbackRunnable : public nsRunnable
{
public:
SuccessCallbackRunnable(
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
nsIDOMFile* aFile, uint64_t aWindowID)
: mSuccess(aSuccess)
, mError(aError)
, mFile(aFile)
, mWindowID(aWindowID)
, mManager(MediaManager::GetInstance()) {}
NS_IMETHOD
Run()
{
// Only run if the window is still active.
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success(mSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
if (!(mManager->IsWindowStillActive(mWindowID))) {
return NS_OK;
}
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
success->OnSuccess(mFile);
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsCOMPtr<nsIDOMFile> mFile;
uint64_t mWindowID;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Invoke the GetUserMediaDevices success callback. Wrapped in a runnable
* so that it may be called on the main thread. The error callback is also
* passed so it can be released correctly.
*/
class DeviceSuccessCallbackRunnable: public nsRunnable
{
public:
DeviceSuccessCallbackRunnable(
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
nsTArray<nsCOMPtr<nsIMediaDevice> >* aDevices)
: mSuccess(aSuccess)
, mError(aError)
, mDevices(aDevices) {}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> success(mSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
nsCOMPtr<nsIWritableVariant> devices =
do_CreateInstance("@mozilla.org/variant;1");
int32_t len = mDevices->Length();
if (len == 0) {
// XXX
// We should in the future return an empty array, and dynamically add
// devices to the dropdowns if things are hotplugged while the
// requester is up.
error->OnError(NS_LITERAL_STRING("NO_DEVICES_FOUND"));
return NS_OK;
}
nsTArray<nsIMediaDevice*> tmp(len);
for (int32_t i = 0; i < len; i++) {
tmp.AppendElement(mDevices->ElementAt(i));
}
devices->SetAsArray(nsIDataType::VTYPE_INTERFACE,
&NS_GET_IID(nsIMediaDevice),
mDevices->Length(),
const_cast<void*>(
static_cast<const void*>(tmp.Elements())
));
success->OnSuccess(devices);
return NS_OK;
}
private:
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsAutoPtr<nsTArray<nsCOMPtr<nsIMediaDevice> > > mDevices;
};
// Handle removing GetUserMediaCallbackMediaStreamListener from main thread
class GetUserMediaListenerRemove: public nsRunnable
{
public:
GetUserMediaListenerRemove(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
: mWindowID(aWindowID)
, mListener(aListener) {}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsRefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
return NS_OK;
}
protected:
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
};
/**
* nsIMediaDevice implementation.
*/
NS_IMPL_THREADSAFE_ISUPPORTS1(MediaDevice, nsIMediaDevice)
NS_IMETHODIMP
MediaDevice::GetName(nsAString& aName)
{
aName.Assign(mName);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetType(nsAString& aType)
{
aType.Assign(mType);
return NS_OK;
}
NS_IMETHODIMP
MediaDevice::GetId(nsAString& aID)
{
aID.Assign(mID);
return NS_OK;
}
MediaEngineSource*
MediaDevice::GetSource()
{
return mSource;
}
/**
* A subclass that we only use to stash internal pointers to MediaStreamGraph objects
* that need to be cleaned up.
*/
class nsDOMUserMediaStream : public DOMLocalMediaStream
{
public:
static already_AddRefed<nsDOMUserMediaStream>
CreateTrackUnionStream(nsIDOMWindow* aWindow, uint32_t aHintContents)
{
nsRefPtr<nsDOMUserMediaStream> stream = new nsDOMUserMediaStream();
stream->InitTrackUnionStream(aWindow, aHintContents);
return stream.forget();
}
virtual ~nsDOMUserMediaStream()
{
Stop();
if (mPort) {
mPort->Destroy();
}
if (mSourceStream) {
mSourceStream->Destroy();
}
}
virtual void Stop()
{
if (mSourceStream) {
mSourceStream->EndAllTrackAndFinish();
}
}
// The actual MediaStream is a TrackUnionStream. But these resources need to be
// explicitly destroyed too.
nsRefPtr<SourceMediaStream> mSourceStream;
nsRefPtr<MediaInputPort> mPort;
};
/**
* Creates a MediaStream, attaches a listener and fires off a success callback
* to the DOM with the stream. We also pass in the error callback so it can
* be released correctly.
*
* All of this must be done on the main thread!
*
* Note that the various GetUserMedia Runnable classes currently allow for
* two streams. If we ever need to support getting more than two streams
* at once, we could convert everything to nsTArray<nsRefPtr<blah> >'s,
* though that would complicate the constructors some. Currently the
* GetUserMedia spec does not allow for more than 2 streams to be obtained in
* one call, to simplify handling of constraints.
*/
class GetUserMediaStreamRunnable : public nsRunnable
{
public:
GetUserMediaStreamRunnable(
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener* aListener,
MediaEngineSource* aAudioSource,
MediaEngineSource* aVideoSource)
: mSuccess(aSuccess)
, mError(aError)
, mAudioSource(aAudioSource)
, mVideoSource(aVideoSource)
, mWindowID(aWindowID)
, mListener(aListener)
, mManager(MediaManager::GetInstance()) {}
~GetUserMediaStreamRunnable() {}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(mWindowID));
// We're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
StreamListeners* listeners = mManager->GetWindowListeners(mWindowID);
if (!listeners || !window || !window->GetExtantDoc()) {
// This window is no longer live. mListener has already been removed
return NS_OK;
}
// Create a media stream.
uint32_t hints = (mAudioSource ? DOMMediaStream::HINT_CONTENTS_AUDIO : 0);
hints |= (mVideoSource ? DOMMediaStream::HINT_CONTENTS_VIDEO : 0);
nsRefPtr<nsDOMUserMediaStream> trackunion =
nsDOMUserMediaStream::CreateTrackUnionStream(window, hints);
if (!trackunion) {
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
LOG(("Returning error for getUserMedia() - no stream"));
error->OnError(NS_LITERAL_STRING("NO_STREAM"));
return NS_OK;
}
MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
nsRefPtr<SourceMediaStream> stream = gm->CreateSourceStream(nullptr);
// connect the source stream to the track union stream to avoid us blocking
trackunion->GetStream()->AsProcessedStream()->SetAutofinish(true);
nsRefPtr<MediaInputPort> port = trackunion->GetStream()->AsProcessedStream()->
AllocateInputPort(stream, MediaInputPort::FLAG_BLOCK_OUTPUT);
trackunion->mSourceStream = stream;
trackunion->mPort = port.forget();
trackunion->CombineWithPrincipal(window->GetExtantDoc()->NodePrincipal());
// The listener was added at the begining in an inactive state.
// Activate our listener. We'll call Start() on the source when get a callback
// that the MediaStream has started consuming. The listener is freed
// when the page is invalidated (on navigation or close).
mListener->Activate(stream.forget(), mAudioSource, mVideoSource);
// Dispatch to the media thread to ask it to start the sources,
// because that can take a while
nsIThread *mediaThread = MediaManager::GetThread();
nsRefPtr<MediaOperationRunnable> runnable(
new MediaOperationRunnable(MEDIA_START, mListener,
mAudioSource, mVideoSource, false));
mediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
#ifdef MOZ_WEBRTC
// Right now these configs are only of use if webrtc is available
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService("@mozilla.org/preferences-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(prefs);
if (branch) {
int32_t aec = (int32_t) webrtc::kEcUnchanged;
int32_t agc = (int32_t) webrtc::kAgcUnchanged;
int32_t noise = (int32_t) webrtc::kNsUnchanged;
bool aec_on = false, agc_on = false, noise_on = false;
branch->GetBoolPref("media.peerconnection.aec_enabled", &aec_on);
branch->GetIntPref("media.peerconnection.aec", &aec);
branch->GetBoolPref("media.peerconnection.agc_enabled", &agc_on);
branch->GetIntPref("media.peerconnection.agc", &agc);
branch->GetBoolPref("media.peerconnection.noise_enabled", &noise_on);
branch->GetIntPref("media.peerconnection.noise", &noise);
mListener->AudioConfig(aec_on, (uint32_t) aec,
agc_on, (uint32_t) agc,
noise_on, (uint32_t) noise);
}
}
#endif
// We're in the main thread, so no worries here either.
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success(mSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
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)
LOG(("Returning success for getUserMedia()"));
success->OnSuccess(static_cast<nsIDOMLocalMediaStream*>(trackunion));
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsRefPtr<MediaEngineSource> mAudioSource;
nsRefPtr<MediaEngineSource> mVideoSource;
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Runs on a seperate thread and is responsible for enumerating devices.
* Depending on whether a picture or stream was asked for, either
* ProcessGetUserMedia or ProcessGetUserMediaSnapshot is called, and the results
* are sent back to the DOM.
*
* Do not run this on the main thread. The success and error callbacks *MUST*
* be dispatched on the main thread!
*/
class GetUserMediaRunnable : public nsRunnable
{
public:
/**
* The caller can choose to provide a MediaDevice as the last argument,
* if one is not provided, a default device is automatically chosen.
*/
GetUserMediaRunnable(bool aAudio, bool aVideo, bool aPicture,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs,
MediaDevice* aAudioDevice, MediaDevice* aVideoDevice)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(aPicture)
, mSuccess(aSuccess)
, mError(aError)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mDeviceChosen(true)
, mBackendChosen(false)
, mManager(MediaManager::GetInstance())
{
if (mAudio) {
mAudioDevice = aAudioDevice;
}
if (mVideo) {
mVideoDevice = aVideoDevice;
}
}
GetUserMediaRunnable(bool aAudio, bool aVideo, bool aPicture,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(aPicture)
, mSuccess(aSuccess)
, mError(aError)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mDeviceChosen(false)
, mBackendChosen(false)
, mManager(MediaManager::GetInstance())
{}
/**
* The caller can also choose to provide their own backend instead of
* using the one provided by MediaManager::GetBackend.
*/
GetUserMediaRunnable(bool aAudio, bool aVideo,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowID, GetUserMediaCallbackMediaStreamListener *aListener,
MediaEnginePrefs &aPrefs,
MediaEngine* aBackend)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(false)
, mSuccess(aSuccess)
, mError(aError)
, mWindowID(aWindowID)
, mListener(aListener)
, mPrefs(aPrefs)
, mDeviceChosen(false)
, mBackendChosen(true)
, mBackend(aBackend)
, mManager(MediaManager::GetInstance())
{}
~GetUserMediaRunnable() {
if (mBackendChosen) {
delete mBackend;
}
}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
// Was a backend provided?
if (!mBackendChosen) {
mBackend = mManager->GetBackend(mWindowID);
}
// Was a device provided?
if (!mDeviceChosen) {
nsresult rv = SelectDevice();
if (rv != NS_OK) {
return rv;
}
}
// It is an error if audio or video are requested along with picture.
if (mPicture && (mAudio || mVideo)) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("NOT_SUPPORTED_ERR"), mWindowID
));
return NS_OK;
}
if (mPicture) {
ProcessGetUserMediaSnapshot(mVideoDevice->GetSource(), 0);
return NS_OK;
}
// There's a bug in the permission code that can leave us with mAudio but no audio device
ProcessGetUserMedia((mAudio && mAudioDevice) ? mAudioDevice->GetSource() : nullptr,
(mVideo && mVideoDevice) ? mVideoDevice->GetSource() : nullptr);
return NS_OK;
}
nsresult
Denied(const nsAString& aErrorMsg)
{
// 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<nsIDOMGetUserMediaErrorCallback> error(mError);
error->OnError(aErrorMsg);
// Should happen *after* error runs for consistency, but may not matter
nsRefPtr<MediaManager> manager(MediaManager::GetInstance());
manager->RemoveFromWindowList(mWindowID, mListener);
} else {
// This will re-check the window being alive on main-thread
// Note: we must remove the listener on MainThread as well
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, aErrorMsg, mWindowID
));
// MUST happen after ErrorCallbackRunnable Run()s, as it checks the active window list
NS_DispatchToMainThread(new GetUserMediaListenerRemove(mWindowID, mListener));
}
return NS_OK;
}
nsresult
SetAudioDevice(MediaDevice* aAudioDevice)
{
mAudioDevice = aAudioDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SetVideoDevice(MediaDevice* aVideoDevice)
{
mVideoDevice = aVideoDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SelectDevice()
{
bool found = false;
uint32_t count;
if (mPicture || mVideo) {
nsTArray<nsRefPtr<MediaEngineVideoSource> > videoSources;
mBackend->EnumerateVideoDevices(&videoSources);
count = videoSources.Length();
if (count <= 0) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("NO_DEVICES_FOUND"), mWindowID
));
return NS_ERROR_FAILURE;
}
/**
* 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.
*/
// Pick the first available device.
for (uint32_t i = 0; i < count; i++) {
nsRefPtr<MediaEngineVideoSource> vSource = videoSources[i];
found = true;
mVideoDevice = new MediaDevice(videoSources[i]);
break;
}
if (!found) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return NS_ERROR_FAILURE;
}
LOG(("Selected video device"));
}
found = false;
if (mAudio) {
nsTArray<nsRefPtr<MediaEngineAudioSource> > audioSources;
mBackend->EnumerateAudioDevices(&audioSources);
count = audioSources.Length();
if (count <= 0) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("NO_DEVICES_FOUND"), mWindowID
));
return NS_ERROR_FAILURE;
}
for (uint32_t i = 0; i < count; i++) {
nsRefPtr<MediaEngineAudioSource> aSource = audioSources[i];
found = true;
mAudioDevice = new MediaDevice(audioSources[i]);
break;
}
if (!found) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return NS_ERROR_FAILURE;
}
LOG(("Selected audio device"));
}
return NS_OK;
}
/**
* Allocates a video or audio device and returns a MediaStream via
* a GetUserMediaStreamRunnable. Runs off the main thread.
*/
void
ProcessGetUserMedia(MediaEngineSource* aAudioSource, MediaEngineSource* aVideoSource)
{
nsresult rv;
if (aAudioSource) {
rv = aAudioSource->Allocate(mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate audiosource %d",rv));
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return;
}
}
if (aVideoSource) {
rv = aVideoSource->Allocate(mPrefs);
if (NS_FAILED(rv)) {
LOG(("Failed to allocate videosource %d\n",rv));
if (aAudioSource) {
aAudioSource->Deallocate();
}
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return;
}
}
NS_DispatchToMainThread(new GetUserMediaStreamRunnable(
mSuccess, mError, mWindowID, mListener, aAudioSource, aVideoSource
));
return;
}
/**
* Allocates a video device, takes a snapshot and returns a DOMFile via
* a SuccessRunnable or an error via the ErrorRunnable. Off the main thread.
*/
void
ProcessGetUserMediaSnapshot(MediaEngineSource* aSource, int aDuration)
{
nsresult rv = aSource->Allocate(mPrefs);
if (NS_FAILED(rv)) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return;
}
/**
* Display picture capture UI here before calling Snapshot() - Bug 748835.
*/
nsCOMPtr<nsIDOMFile> file;
aSource->Snapshot(aDuration, getter_AddRefs(file));
aSource->Deallocate();
NS_DispatchToMainThread(new SuccessCallbackRunnable(
mSuccess, mError, file, mWindowID
));
return;
}
private:
bool mAudio;
bool mVideo;
bool mPicture;
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
uint64_t mWindowID;
nsRefPtr<GetUserMediaCallbackMediaStreamListener> mListener;
nsRefPtr<MediaDevice> mAudioDevice;
nsRefPtr<MediaDevice> mVideoDevice;
MediaEnginePrefs mPrefs;
bool mDeviceChosen;
bool mBackendChosen;
MediaEngine* mBackend;
nsRefPtr<MediaManager> mManager; // get ref to this when creating the runnable
};
/**
* Similar to GetUserMediaRunnable, but used for the chrome-only
* GetUserMediaDevices function. Enumerates a list of audio & video devices,
* wraps them up in nsIMediaDevice objects and returns it to the success
* callback.
*/
class GetUserMediaDevicesRunnable : public nsRunnable
{
public:
GetUserMediaDevicesRunnable(
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
uint64_t aWindowId)
: mSuccess(aSuccess)
, mError(aError)
, mManager(MediaManager::GetInstance())
, mWindowId(aWindowId)
{}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
uint32_t audioCount, videoCount, i;
nsTArray<nsRefPtr<MediaEngineVideoSource> > videoSources;
mManager->GetBackend(mWindowId)->EnumerateVideoDevices(&videoSources);
videoCount = videoSources.Length();
nsTArray<nsRefPtr<MediaEngineAudioSource> > audioSources;
mManager->GetBackend(mWindowId)->EnumerateAudioDevices(&audioSources);
audioCount = audioSources.Length();
nsTArray<nsCOMPtr<nsIMediaDevice> > *devices =
new nsTArray<nsCOMPtr<nsIMediaDevice> >;
/**
* We're allowing multiple tabs to access the same camera for parity
* with Chrome. See bug 811757 for some of the issues surrounding
* this decision. To disallow, we'd filter by IsAvailable() as we used
* to.
*/
for (i = 0; i < videoCount; i++) {
MediaEngineVideoSource *vSource = videoSources[i];
devices->AppendElement(new MediaDevice(vSource));
}
for (i = 0; i < audioCount; i++) {
MediaEngineAudioSource *aSource = audioSources[i];
devices->AppendElement(new MediaDevice(aSource));
}
NS_DispatchToMainThread(new DeviceSuccessCallbackRunnable(
mSuccess, mError, devices // give ownership of the nsTArray to the runnable
));
return NS_OK;
}
private:
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsRefPtr<MediaManager> mManager;
uint64_t mWindowId;
};
MediaManager::MediaManager()
: mMediaThread(nullptr)
, mMutex("mozilla::MediaManager")
, mBackend(nullptr) {
mPrefs.mWidth = MediaEngine::DEFAULT_VIDEO_WIDTH;
mPrefs.mHeight = MediaEngine::DEFAULT_VIDEO_HEIGHT;
mPrefs.mFPS = MediaEngine::DEFAULT_VIDEO_FPS;
mPrefs.mMinFPS = MediaEngine::DEFAULT_VIDEO_MIN_FPS;
nsresult rv;
nsCOMPtr<nsIPrefService> prefs = do_GetService("@mozilla.org/preferences-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrefBranch> branch = do_QueryInterface(prefs);
if (branch) {
GetPrefs(branch, nullptr);
}
}
LOG(("%s: default prefs: %dx%d @%dfps (min %d)", __FUNCTION__,
mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mMinFPS));
mActiveWindows.Init();
mActiveCallbacks.Init();
}
NS_IMPL_THREADSAFE_ISUPPORTS2(MediaManager, nsIMediaManagerService, nsIObserver)
/* static */ StaticRefPtr<MediaManager> MediaManager::sSingleton;
// NOTE: never Dispatch(....,NS_DISPATCH_SYNC) to the MediaManager
// thread from the MainThread, as we NS_DISPATCH_SYNC to MainThread
// from MediaManager thread.
/* static */ MediaManager*
MediaManager::Get() {
if (!sSingleton) {
sSingleton = new MediaManager();
NS_NewNamedThread("MediaManager", getter_AddRefs(sSingleton->mMediaThread));
LOG(("New Media thread for gum"));
NS_ASSERTION(NS_IsMainThread(), "Only create MediaManager on main thread");
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(sSingleton, "xpcom-shutdown", false);
obs->AddObserver(sSingleton, "getUserMedia:response:allow", false);
obs->AddObserver(sSingleton, "getUserMedia:response:deny", false);
obs->AddObserver(sSingleton, "getUserMedia:revoke", false);
}
// else MediaManager won't work properly and will leak (see bug 837874)
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->AddObserver("media.navigator.video.default_width", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_height", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_fps", sSingleton, false);
prefs->AddObserver("media.navigator.video.default_minfps", sSingleton, false);
}
}
return sSingleton;
}
/* static */ already_AddRefed<MediaManager>
MediaManager::GetInstance()
{
// so we can have non-refcounted getters
nsRefPtr<MediaManager> service = MediaManager::Get();
return service.forget();
}
/**
* The entry point for this file. A call from Navigator::mozGetUserMedia
* will end up here. MediaManager is a singleton that is responsible
* for handling all incoming getUserMedia calls from every window.
*/
nsresult
MediaManager::GetUserMedia(bool aPrivileged, nsPIDOMWindow* aWindow,
nsIMediaStreamOptions* aParams,
nsIDOMGetUserMediaSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnError)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
NS_ENSURE_TRUE(aParams, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aWindow, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnError, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnSuccess, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError(aOnError);
/* Get options */
nsresult rv;
bool fake, audio, video, picture;
rv = aParams->GetFake(&fake);
NS_ENSURE_SUCCESS(rv, rv);
rv = aParams->GetPicture(&picture);
NS_ENSURE_SUCCESS(rv, rv);
rv = aParams->GetAudio(&audio);
NS_ENSURE_SUCCESS(rv, rv);
rv = aParams->GetVideo(&video);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIMediaDevice> audiodevice;
rv = aParams->GetAudioDevice(getter_AddRefs(audiodevice));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIMediaDevice> videodevice;
rv = aParams->GetVideoDevice(getter_AddRefs(videodevice));
NS_ENSURE_SUCCESS(rv, rv);
// If a device was provided, make sure it support the type of stream requested.
if (audiodevice) {
nsString type;
audiodevice->GetType(type);
if (audio && !type.EqualsLiteral("audio")) {
return NS_ERROR_FAILURE;
}
}
if (videodevice) {
nsString type;
videodevice->GetType(type);
if ((picture || video) && !type.EqualsLiteral("video")) {
return NS_ERROR_FAILURE;
}
}
// We only support "front" or "back". TBD: Send to GetUserMediaRunnable.
nsString cameraType;
rv = aParams->GetCamera(cameraType);
NS_ENSURE_SUCCESS(rv, rv);
/**
* If we were asked to get a picture, before getting a snapshot, we check if
* the calling page is allowed to open a popup. We do this because
* {picture:true} will open a new "window" to let the user preview or select
* an image, on Android. The desktop UI for {picture:true} is TBD, at which
* may point we can decide whether to extend this test there as well.
*/
#if !defined(MOZ_WEBRTC)
if (picture && !aPrivileged) {
if (aWindow->GetPopupControlState() > openControlled) {
nsCOMPtr<nsIPopupWindowManager> pm =
do_GetService(NS_POPUPWINDOWMANAGER_CONTRACTID);
if (!pm) {
return NS_OK;
}
uint32_t permission;
nsCOMPtr<nsIDocument> doc = aWindow->GetExtantDoc();
pm->TestPermission(doc->NodePrincipal(), &permission);
if (permission == nsIPopupWindowManager::DENY_POPUP) {
nsGlobalWindow::FirePopupBlockedEvent(
doc, aWindow, nullptr, EmptyString(), EmptyString()
);
return NS_OK;
}
}
}
#endif
static bool created = false;
if (!created) {
// Force MediaManager to startup before we try to access it from other threads
// Hack: should init singleton earlier unless it's expensive (mem or CPU)
(void) MediaManager::Get();
}
// Store the WindowID in a hash table and mark as active. The entry is removed
// when this window is closed or navigated away from.
uint64_t windowID = aWindow->WindowID();
nsRefPtr<GetUserMediaRunnable> gUMRunnable;
// This is safe since we're on main-thread, and the windowlist can only
// be invalidated from the main-thread (see OnNavigation)
StreamListeners* listeners = GetActiveWindows()->Get(windowID);
if (!listeners) {
listeners = new StreamListeners;
GetActiveWindows()->Put(windowID, listeners);
}
// Ensure there's a thread for gum to proxy to off main thread
nsIThread *mediaThread = MediaManager::GetThread();
// Create a disabled listener to act as a placeholder
GetUserMediaCallbackMediaStreamListener* listener =
new GetUserMediaCallbackMediaStreamListener(mediaThread, windowID);
// No need for locking because we always do this in the main thread.
listeners->AppendElement(listener);
// Developer preference for turning off permission check.
if (Preferences::GetBool("media.navigator.permission.disabled", false)) {
aPrivileged = true;
}
/**
* Pass runnables along to GetUserMediaRunnable so it can add the
* MediaStreamListener to the runnable list. The last argument can
* optionally be a MediaDevice object, which should provided if one was
* selected by the user via the UI, or was provided by privileged code
* via the device: attribute via nsIMediaStreamOptions.
*
* If a fake stream was requested, we force the use of the default backend.
*/
// XXX take options from constraints instead of prefs
if (fake) {
// Fake stream from default backend.
gUMRunnable = new GetUserMediaRunnable(
audio, video, onSuccess.forget(), onError.forget(), windowID, listener, mPrefs,
new MediaEngineDefault()
);
} else if (audiodevice || videodevice) {
// Stream from provided device.
gUMRunnable = new GetUserMediaRunnable(
audio, video, picture, onSuccess.forget(), onError.forget(), windowID, listener, mPrefs,
static_cast<MediaDevice*>(audiodevice.get()),
static_cast<MediaDevice*>(videodevice.get())
);
} else {
// Stream from default device from WebRTC backend.
gUMRunnable = new GetUserMediaRunnable(
audio, video, picture, onSuccess.forget(), onError.forget(), windowID, listener, mPrefs
);
}
#ifdef MOZ_B2G_CAMERA
if (mCameraManager == nullptr) {
mCameraManager = nsDOMCameraManager::CheckPermissionAndCreateInstance(aWindow);
if (!mCameraManager) {
aPrivileged = false;
}
}
#endif
#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
if (picture) {
// ShowFilePickerForMimeType() must run on the Main Thread! (on Android)
NS_DispatchToMainThread(gUMRunnable);
return NS_OK;
}
#endif
// XXX No full support for picture in Desktop yet (needs proper UI)
if (aPrivileged || fake) {
mMediaThread->Dispatch(gUMRunnable, NS_DISPATCH_NORMAL);
} else {
// Ask for user permission, and dispatch runnable (or not) when a response
// is received via an observer notification. Each call is paired with its
// runnable by a GUID.
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);
NS_ConvertUTF8toUTF16 callID(buffer);
// Store the current callback.
mActiveCallbacks.Put(callID, gUMRunnable);
// Construct JSON structure with both the windowID and the callID.
nsAutoString data;
data.Append(NS_LITERAL_STRING("{\"windowID\":"));
// Convert window ID to string.
char windowBuffer[32];
PR_snprintf(windowBuffer, sizeof(windowBuffer), "%llu",
aWindow->GetOuterWindow()->WindowID());
data.Append(NS_ConvertUTF8toUTF16(windowBuffer));
data.Append(NS_LITERAL_STRING(", \"callID\":\""));
data.Append(callID);
data.Append(NS_LITERAL_STRING("\"}"));
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
obs->NotifyObservers(aParams, "getUserMedia:request", data.get());
}
return NS_OK;
}
nsresult
MediaManager::GetUserMediaDevices(nsPIDOMWindow* aWindow,
nsIGetUserMediaDevicesSuccessCallback* aOnSuccess,
nsIDOMGetUserMediaErrorCallback* aOnError)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
NS_ENSURE_TRUE(aOnError, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aOnSuccess, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError(aOnError);
nsCOMPtr<nsIRunnable> gUMDRunnable = new GetUserMediaDevicesRunnable(
onSuccess.forget(), onError.forget(), aWindow->WindowID()
);
nsCOMPtr<nsIThread> deviceThread;
nsresult rv = NS_NewThread(getter_AddRefs(deviceThread));
NS_ENSURE_SUCCESS(rv, rv);
deviceThread->Dispatch(gUMDRunnable, NS_DISPATCH_NORMAL);
return NS_OK;
}
MediaEngine*
MediaManager::GetBackend(uint64_t aWindowId)
{
// Plugin backends as appropriate. The default engine also currently
// includes picture support for Android.
// This IS called off main-thread.
MutexAutoLock lock(mMutex);
if (!mBackend) {
#if defined(MOZ_WEBRTC)
#ifndef MOZ_B2G_CAMERA
mBackend = new MediaEngineWebRTC();
#else
mBackend = new MediaEngineWebRTC(mCameraManager, aWindowId);
#endif
#else
mBackend = new MediaEngineDefault();
#endif
}
return mBackend;
}
void
MediaManager::OnNavigation(uint64_t aWindowID)
{
NS_ASSERTION(NS_IsMainThread(), "OnNavigation called off main thread");
// Invalidate this window. The runnables check this value before making
// a call to content.
// This is safe since we're on main-thread, and the windowlist can only
// be added to from the main-thread
StreamListeners* listeners = GetWindowListeners(aWindowID);
if (!listeners) {
return;
}
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; i++) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
if (listener->Stream()) { // aka HasBeenActivate()ed
listener->Invalidate();
}
listener->Remove();
}
listeners->Clear();
RemoveWindowID(aWindowID);
// listeners has been deleted
}
void
MediaManager::RemoveFromWindowList(uint64_t aWindowID,
GetUserMediaCallbackMediaStreamListener *aListener)
{
NS_ASSERTION(NS_IsMainThread(), "RemoveFromWindowList called off main thread");
// This is defined as safe on an inactive GUMCMSListener
aListener->Remove(); // really queues the remove
StreamListeners* listeners = GetWindowListeners(aWindowID);
if (!listeners) {
return;
}
listeners->RemoveElement(aListener);
if (listeners->Length() == 0) {
RemoveWindowID(aWindowID);
// listeners has been deleted here
// get outer windowID
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aWindowID));
if (window) {
nsPIDOMWindow *outer = window->GetOuterWindow();
if (outer) {
uint64_t outerID = outer->WindowID();
// Notify the UI that this window no longer has gUM active
char windowBuffer[32];
PR_snprintf(windowBuffer, sizeof(windowBuffer), "%llu", outerID);
nsAutoString data;
data.Append(NS_ConvertUTF8toUTF16(windowBuffer));
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
obs->NotifyObservers(nullptr, "recording-window-ended", data.get());
LOG(("Sent recording-window-ended for window %llu (outer %llu)",
aWindowID, outerID));
} else {
LOG(("No outer window for inner %llu", aWindowID));
}
} else {
LOG(("No inner window for %llu", aWindowID));
}
}
}
void
MediaManager::GetPref(nsIPrefBranch *aBranch, const char *aPref,
const char *aData, int32_t *aVal)
{
int32_t temp;
if (aData == nullptr || strcmp(aPref,aData) == 0) {
if (NS_SUCCEEDED(aBranch->GetIntPref(aPref, &temp))) {
*aVal = temp;
}
}
}
void
MediaManager::GetPrefs(nsIPrefBranch *aBranch, const char *aData)
{
GetPref(aBranch, "media.navigator.video.default_width", aData, &mPrefs.mWidth);
GetPref(aBranch, "media.navigator.video.default_height", aData, &mPrefs.mHeight);
GetPref(aBranch, "media.navigator.video.default_fps", aData, &mPrefs.mFPS);
GetPref(aBranch, "media.navigator.video.default_minfps", aData, &mPrefs.mMinFPS);
}
nsresult
MediaManager::Observe(nsISupports* aSubject, const char* aTopic,
const PRUnichar* aData)
{
NS_ASSERTION(NS_IsMainThread(), "Observer invoked off the main thread");
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsCOMPtr<nsIPrefBranch> branch( do_QueryInterface(aSubject) );
if (branch) {
GetPrefs(branch,NS_ConvertUTF16toUTF8(aData).get());
LOG(("%s: %dx%d @%dfps (min %d)", __FUNCTION__,
mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mMinFPS));
}
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
obs->RemoveObserver(this, "xpcom-shutdown");
obs->RemoveObserver(this, "getUserMedia:response:allow");
obs->RemoveObserver(this, "getUserMedia:response:deny");
obs->RemoveObserver(this, "getUserMedia:revoke");
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs) {
prefs->RemoveObserver("media.navigator.video.default_width", this);
prefs->RemoveObserver("media.navigator.video.default_height", this);
prefs->RemoveObserver("media.navigator.video.default_fps", this);
prefs->RemoveObserver("media.navigator.video.default_minfps", this);
}
// Close off any remaining active windows.
{
MutexAutoLock lock(mMutex);
GetActiveWindows()->Clear();
mActiveCallbacks.Clear();
LOG(("Releasing MediaManager singleton and thread"));
sSingleton = nullptr;
}
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:response:allow")) {
nsString key(aData);
nsRefPtr<nsRunnable> runnable;
if (!mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
return NS_OK;
}
mActiveCallbacks.Remove(key);
if (aSubject) {
// A particular device or devices were chosen by the user.
// NOTE: does not allow setting a device to null; assumes nullptr
GetUserMediaRunnable* gUMRunnable =
static_cast<GetUserMediaRunnable*>(runnable.get());
nsCOMPtr<nsISupportsArray> array(do_QueryInterface(aSubject));
MOZ_ASSERT(array);
uint32_t len = 0;
array->Count(&len);
MOZ_ASSERT(len);
if (!len) {
gUMRunnable->Denied(NS_LITERAL_STRING("PERMISSION_DENIED")); // neither audio nor video were selected
return NS_OK;
}
for (uint32_t i = 0; i < len; i++) {
nsCOMPtr<nsISupports> supports;
array->GetElementAt(i,getter_AddRefs(supports));
nsCOMPtr<nsIMediaDevice> device(do_QueryInterface(supports));
MOZ_ASSERT(device); // shouldn't be returning anything else...
if (device) {
nsString type;
device->GetType(type);
if (type.EqualsLiteral("video")) {
gUMRunnable->SetVideoDevice(static_cast<MediaDevice*>(device.get()));
} else if (type.EqualsLiteral("audio")) {
gUMRunnable->SetAudioDevice(static_cast<MediaDevice*>(device.get()));
} else {
NS_WARNING("Unknown device type in getUserMedia");
}
}
}
}
// Reuse the same thread to save memory.
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:response:deny")) {
nsString errorMessage(NS_LITERAL_STRING("PERMISSION_DENIED"));
if (aSubject) {
nsCOMPtr<nsISupportsString> msg(do_QueryInterface(aSubject));
MOZ_ASSERT(msg);
msg->GetData(errorMessage);
if (errorMessage.IsEmpty())
errorMessage.Assign(NS_LITERAL_STRING("UNKNOWN_ERROR"));
}
nsString key(aData);
nsRefPtr<nsRunnable> runnable;
if (!mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
return NS_OK;
}
mActiveCallbacks.Remove(key);
GetUserMediaRunnable* gUMRunnable =
static_cast<GetUserMediaRunnable*>(runnable.get());
gUMRunnable->Denied(errorMessage);
return NS_OK;
} else if (!strcmp(aTopic, "getUserMedia:revoke")) {
nsresult rv;
uint64_t windowID = nsString(aData).ToInteger64(&rv);
MOZ_ASSERT(NS_SUCCEEDED(rv));
if (NS_SUCCEEDED(rv)) {
LOG(("Revoking MediaCapture access for window %llu",windowID));
OnNavigation(windowID);
}
return NS_OK;
}
return NS_OK;
}
static PLDHashOperator
WindowsHashToArrayFunc (const uint64_t& aId,
StreamListeners* aData,
void *userArg)
{
nsISupportsArray *array =
static_cast<nsISupportsArray *>(userArg);
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(aId));
(void) aData;
MOZ_ASSERT(window);
if (window) {
array->AppendElement(window);
}
return PL_DHASH_NEXT;
}
nsresult
MediaManager::GetActiveMediaCaptureWindows(nsISupportsArray **aArray)
{
MOZ_ASSERT(aArray);
nsISupportsArray *array;
nsresult rv = NS_NewISupportsArray(&array); // AddRefs
if (NS_FAILED(rv))
return rv;
mActiveWindows.EnumerateRead(WindowsHashToArrayFunc, array);
*aArray = array;
return NS_OK;
}
NS_IMETHODIMP
MediaManager::MediaCaptureWindowState(nsIDOMWindow* aWindow, bool* aVideo,
bool* aAudio)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
*aVideo = false;
*aAudio = false;
nsresult rv = MediaCaptureWindowStateInternal(aWindow, aVideo, aAudio);
#ifdef DEBUG
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
LOG(("%s: window %lld capturing %s %s", __FUNCTION__, piWin ? piWin->WindowID() : -1,
*aVideo ? "video" : "", *aAudio ? "audio" : ""));
#endif
return rv;
}
nsresult
MediaManager::MediaCaptureWindowStateInternal(nsIDOMWindow* aWindow, bool* aVideo,
bool* aAudio)
{
// We need to return the union of all streams in all innerwindows that
// correspond to that outerwindow.
// Iterate the docshell tree to find all the child windows, find
// all the listeners for each one, get the booleans, and merge the
// results.
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryInterface(aWindow);
if (piWin) {
if (piWin->GetCurrentInnerWindow() || piWin->IsInnerWindow()) {
uint64_t windowID;
if (piWin->GetCurrentInnerWindow()) {
windowID = piWin->GetCurrentInnerWindow()->WindowID();
} else {
windowID = piWin->WindowID();
}
StreamListeners* listeners = GetActiveWindows()->Get(windowID);
if (listeners) {
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; ++i) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
if (listener->CapturingVideo()) {
*aVideo = true;
}
if (listener->CapturingAudio()) {
*aAudio = true;
}
if (*aAudio && *aVideo) {
return NS_OK; // no need to continue iterating
}
}
}
}
// iterate any children of *this* window (iframes, etc)
nsCOMPtr<nsIDocShellTreeNode> node =
do_QueryInterface(piWin->GetDocShell());
if (node) {
int32_t i, count;
node->GetChildCount(&count);
for (i = 0; i < count; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
node->GetChildAt(i, getter_AddRefs(item));
nsCOMPtr<nsPIDOMWindow> win = do_GetInterface(item);
MediaCaptureWindowStateInternal(win, aVideo, aAudio);
if (*aAudio && *aVideo) {
return NS_OK; // no need to continue iterating
}
}
}
}
return NS_OK;
}
// Can be invoked from EITHER MainThread or MSG thread
void
GetUserMediaCallbackMediaStreamListener::Invalidate()
{
nsRefPtr<MediaOperationRunnable> runnable;
// We can't take a chance on blocking here, so proxy this to another
// thread.
// Pass a ref to us (which is threadsafe) so it can query us for the
// source stream info.
runnable = new MediaOperationRunnable(MEDIA_STOP,
this, mAudioSource, mVideoSource,
mFinished);
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
}
// Called from the MediaStreamGraph thread
void
GetUserMediaCallbackMediaStreamListener::NotifyFinished(MediaStreamGraph* aGraph)
{
mFinished = true;
Invalidate(); // we know it's been activated
NS_DispatchToMainThread(new GetUserMediaListenerRemove(mWindowID, this));
}
// Called from the MediaStreamGraph thread
// this can be in response to our own RemoveListener() (via ::Remove()), or
// because the DOM GC'd the DOMLocalMediaStream/etc we're attached to.
void
GetUserMediaCallbackMediaStreamListener::NotifyRemoved(MediaStreamGraph* aGraph)
{
{
MutexAutoLock lock(mLock); // protect access to mRemoved
MM_LOG(("Listener removed by DOM Destroy(), mFinished = %d", (int) mFinished));
mRemoved = true;
}
if (!mFinished) {
NotifyFinished(aGraph);
}
}
} // namespace mozilla