gecko/dom/media/MediaManager.cpp

895 lines
26 KiB
C++

/* 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"
// 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 {
// We only support 1 audio and 1 video track for now.
enum {
kVideoTrack = 1,
kAudioTrack = 2
};
/**
* 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 nsString& aErrorMsg, uint64_t aWindowID)
: mSuccess(aSuccess)
, mError(aError)
, mErrorMsg(aErrorMsg)
, mWindowID(aWindowID) {}
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);
WindowTable* activeWindows = MediaManager::Get()->GetActiveWindows();
if (activeWindows->Get(mWindowID)) {
error->OnError(mErrorMsg);
}
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
const nsString mErrorMsg;
uint64_t mWindowID;
};
/**
* 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) {}
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);
WindowTable* activeWindows = MediaManager::Get()->GetActiveWindows();
if (activeWindows->Get(mWindowID)) {
// XPConnect is a magical unicorn.
success->OnSuccess(mFile);
}
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsCOMPtr<nsIDOMFile> mFile;
uint64_t mWindowID;
};
/**
* 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,
const 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) {
devices->SetAsEmptyArray();
success->OnSuccess(devices);
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;
nsTArray<nsCOMPtr<nsIMediaDevice> > mDevices;
};
/**
* 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;
}
MediaEngineSource*
MediaDevice::GetSource()
{
return mSource;
}
/**
* 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!
*/
class GetUserMediaStreamRunnable : public nsRunnable
{
public:
GetUserMediaStreamRunnable(
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
MediaEngineSource* aSource, StreamListeners* aListeners,
uint64_t aWindowID, TrackID aTrackID)
: mSuccess(aSuccess)
, mError(aError)
, mSource(aSource)
, mListeners(aListeners)
, mWindowID(aWindowID)
, mTrackID(aTrackID) {}
~GetUserMediaStreamRunnable() {}
NS_IMETHOD
Run()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
// Create a media stream.
nsCOMPtr<nsDOMMediaStream> stream;
if (mTrackID == kVideoTrack) {
stream = nsDOMMediaStream::CreateInputStream(
nsDOMMediaStream::HINT_CONTENTS_VIDEO
);
} else {
stream = nsDOMMediaStream::CreateInputStream(
nsDOMMediaStream::HINT_CONTENTS_AUDIO
);
}
nsPIDOMWindow *window = static_cast<nsPIDOMWindow*>
(nsGlobalWindow::GetInnerWindowWithId(mWindowID));
if (window && window->GetExtantDoc()) {
stream->CombineWithPrincipal(window->GetExtantDoc()->NodePrincipal());
}
// Add 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).
GetUserMediaCallbackMediaStreamListener* listener =
new GetUserMediaCallbackMediaStreamListener(mSource, stream, mTrackID);
stream->GetStream()->AddListener(listener);
// No need for locking because we always do this in the main thread.
mListeners->AppendElement(listener);
// We're in the main thread, so no worries here either.
nsCOMPtr<nsIDOMGetUserMediaSuccessCallback> success(mSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
WindowTable* activeWindows = MediaManager::Get()->GetActiveWindows();
if (activeWindows->Get(mWindowID)) {
success->OnSuccess(stream);
}
return NS_OK;
}
private:
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
nsRefPtr<MediaEngineSource> mSource;
StreamListeners* mListeners;
uint64_t mWindowID;
TrackID mTrackID;
};
/**
* 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,
StreamListeners* aListeners, uint64_t aWindowID, MediaDevice* aDevice)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(aPicture)
, mSuccess(aSuccess)
, mError(aError)
, mListeners(aListeners)
, mWindowID(aWindowID)
, mDevice(aDevice)
, mDeviceChosen(true)
, mBackendChosen(false) {}
GetUserMediaRunnable(bool aAudio, bool aVideo, bool aPicture,
already_AddRefed<nsIDOMGetUserMediaSuccessCallback> aSuccess,
already_AddRefed<nsIDOMGetUserMediaErrorCallback> aError,
StreamListeners* aListeners, uint64_t aWindowID)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(aPicture)
, mSuccess(aSuccess)
, mError(aError)
, mListeners(aListeners)
, mWindowID(aWindowID)
, mDeviceChosen(false)
, mBackendChosen(false) {}
/**
* 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,
StreamListeners* aListeners, uint64_t aWindowID, MediaEngine* aBackend)
: mAudio(aAudio)
, mVideo(aVideo)
, mPicture(false)
, mSuccess(aSuccess)
, mError(aError)
, mListeners(aListeners)
, mWindowID(aWindowID)
, mDeviceChosen(false)
, mBackendChosen(true)
, mBackend(aBackend) {}
~GetUserMediaRunnable() {
if (mBackendChosen) {
delete mBackend;
}
}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
mManager = MediaManager::Get();
// Was a backend provided?
if (!mBackendChosen) {
mBackend = mManager->GetBackend();
}
// 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;
}
// XXX: Implement merging two streams (See bug 758391).
if (mAudio && mVideo) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("NOT_IMPLEMENTED"), mWindowID
));
return NS_OK;
}
if (mPicture) {
ProcessGetUserMediaSnapshot(mDevice->GetSource(), 0);
return NS_OK;
}
if (mVideo) {
ProcessGetUserMedia(mDevice->GetSource(), kVideoTrack);
return NS_OK;
}
if (mAudio) {
ProcessGetUserMedia(mDevice->GetSource(), kAudioTrack);
return NS_OK;
}
return NS_OK;
}
nsresult
Denied()
{
if (NS_IsMainThread()) {
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> error(mError);
error->OnError(NS_LITERAL_STRING("PERMISSION_DENIED"));
} else {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("PERMISSION_DENIED"), mWindowID
));
}
return NS_OK;
}
nsresult
SetDevice(MediaDevice* aDevice)
{
mDevice = aDevice;
mDeviceChosen = true;
return NS_OK;
}
nsresult
SelectDevice()
{
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;
}
mDevice = new MediaDevice(videoSources[0]);
} else {
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;
}
mDevice = new MediaDevice(audioSources[0]);
}
return NS_OK;
}
/**
* Allocates a video or audio device and returns a MediaStream via
* a GetUserMediaStreamRunnable. Runs off the main thread.
*/
void
ProcessGetUserMedia(MediaEngineSource* aSource, TrackID aTrackID)
{
nsresult rv = aSource->Allocate();
if (NS_FAILED(rv)) {
NS_DispatchToMainThread(new ErrorCallbackRunnable(
mSuccess, mError, NS_LITERAL_STRING("HARDWARE_UNAVAILABLE"), mWindowID
));
return;
}
NS_DispatchToMainThread(new GetUserMediaStreamRunnable(
mSuccess, mError, aSource, mListeners, mWindowID, aTrackID
));
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();
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;
StreamListeners* mListeners;
uint64_t mWindowID;
nsRefPtr<MediaDevice> mDevice;
bool mDeviceChosen;
bool mBackendChosen;
MediaEngine* mBackend;
MediaManager* mManager;
};
/**
* 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)
: mSuccess(aSuccess)
, mError(aError) {}
~GetUserMediaDevicesRunnable() {}
NS_IMETHOD
Run()
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
uint32_t audioCount, videoCount, i;
MediaManager* manager = MediaManager::Get();
nsTArray<nsRefPtr<MediaEngineVideoSource> > videoSources;
manager->GetBackend()->EnumerateVideoDevices(&videoSources);
videoCount = videoSources.Length();
nsTArray<nsRefPtr<MediaEngineAudioSource> > audioSources;
manager->GetBackend()->EnumerateAudioDevices(&audioSources);
audioCount = audioSources.Length();
nsTArray<nsCOMPtr<nsIMediaDevice> > *devices =
new nsTArray<nsCOMPtr<nsIMediaDevice> >;
for (i = 0; i < videoCount; i++) {
devices->AppendElement(new MediaDevice(videoSources[i]));
}
for (i = 0; i < audioCount; i++) {
devices->AppendElement(new MediaDevice(audioSources[i]));
}
NS_DispatchToMainThread(new DeviceSuccessCallbackRunnable(
mSuccess, mError, *devices
));
return NS_OK;
}
private:
already_AddRefed<nsIGetUserMediaDevicesSuccessCallback> mSuccess;
already_AddRefed<nsIDOMGetUserMediaErrorCallback> mError;
};
nsRefPtr<MediaManager> MediaManager::sSingleton;
NS_IMPL_THREADSAFE_ISUPPORTS1(MediaManager, nsIObserver)
/**
* 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);
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> device;
rv = aParams->GetDevice(getter_AddRefs(device));
NS_ENSURE_SUCCESS(rv, rv);
// If a device was provided, make sure it support the type of stream requested.
if (device) {
nsString type;
device->GetType(type);
if ((picture || video) && !type.EqualsLiteral("video")) {
return NS_ERROR_FAILURE;
}
if (audio && !type.EqualsLiteral("audio")) {
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)) {
nsCOMPtr<nsIDOMDocument> domDoc = aWindow->GetExtantDocument();
nsGlobalWindow::FirePopupBlockedEvent(
domDoc, aWindow, nullptr, EmptyString(), EmptyString()
);
return NS_OK;
}
}
}
#endif
// 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();
StreamListeners* listeners = mActiveWindows.Get(windowID);
if (!listeners) {
listeners = new StreamListeners;
mActiveWindows.Put(windowID, listeners);
}
// 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.
*/
nsRefPtr<GetUserMediaRunnable> gUMRunnable;
if (fake) {
// Fake stream from default backend.
gUMRunnable = new GetUserMediaRunnable(
audio, video, onSuccess.forget(), onError.forget(), listeners,
windowID, new MediaEngineDefault()
);
} else if (device) {
// Stream from provided device.
gUMRunnable = new GetUserMediaRunnable(
audio, video, picture, onSuccess.forget(), onError.forget(), listeners,
windowID, static_cast<MediaDevice*>(device.get())
);
} else {
// Stream from default device from WebRTC backend.
gUMRunnable = new GetUserMediaRunnable(
audio, video, picture, onSuccess.forget(), onError.forget(), listeners,
windowID
);
}
if (picture) {
// ShowFilePickerForMimeType() must run on the Main Thread! (on Android)
NS_DispatchToMainThread(gUMRunnable);
} else if (aPrivileged || fake) {
if (!mMediaThread) {
nsresult rv = NS_NewThread(getter_AddRefs(mMediaThread));
NS_ENSURE_SUCCESS(rv, rv);
}
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, 32, "%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");
nsCOMPtr<nsIGetUserMediaDevicesSuccessCallback> onSuccess(aOnSuccess);
nsCOMPtr<nsIDOMGetUserMediaErrorCallback> onError(aOnError);
nsCOMPtr<nsIRunnable> gUMDRunnable = new GetUserMediaDevicesRunnable(
onSuccess.forget(), onError.forget()
);
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()
{
// Plugin backends as appropriate. The default engine also currently
// includes picture support for Android.
if (!mBackend) {
#if defined(MOZ_WEBRTC)
mBackend = new MediaEngineWebRTC();
#else
mBackend = new MediaEngineDefault();
#endif
}
return mBackend;
}
WindowTable*
MediaManager::GetActiveWindows()
{
return &mActiveWindows;
}
void
MediaManager::OnNavigation(uint64_t aWindowID)
{
// Invalidate this window. The runnables check this value before making
// a call to content.
StreamListeners* listeners = mActiveWindows.Get(aWindowID);
if (!listeners) {
return;
}
uint32_t length = listeners->Length();
for (uint32_t i = 0; i < length; i++) {
nsRefPtr<GetUserMediaCallbackMediaStreamListener> listener =
listeners->ElementAt(i);
listener->Invalidate();
listener = nullptr;
}
listeners->Clear();
mActiveWindows.Remove(aWindowID);
}
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, "xpcom-shutdown")) {
obs->RemoveObserver(this, "xpcom-shutdown");
obs->RemoveObserver(this, "getUserMedia:response:allow");
obs->RemoveObserver(this, "getUserMedia:response:deny");
// Close off any remaining active windows.
mActiveWindows.Clear();
mActiveCallbacks.Clear();
sSingleton = nullptr;
return NS_OK;
}
if (!strcmp(aTopic, "getUserMedia:response:allow")) {
nsString key(aData);
nsRefPtr<nsRunnable> runnable;
if (!mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
return NS_OK;
}
// Reuse the same thread to save memory.
if (!mMediaThread) {
nsresult rv = NS_NewThread(getter_AddRefs(mMediaThread));
NS_ENSURE_SUCCESS(rv, rv);
}
if (aSubject) {
// A particular device was chosen by the user.
nsCOMPtr<nsIMediaDevice> device = do_QueryInterface(aSubject);
if (device) {
GetUserMediaRunnable* gUMRunnable =
static_cast<GetUserMediaRunnable*>(runnable.get());
gUMRunnable->SetDevice(static_cast<MediaDevice*>(device.get()));
}
}
mMediaThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
mActiveCallbacks.Remove(key);
return NS_OK;
}
if (!strcmp(aTopic, "getUserMedia:response:deny")) {
nsString key(aData);
nsRefPtr<nsRunnable> runnable;
if (mActiveCallbacks.Get(key, getter_AddRefs(runnable))) {
GetUserMediaRunnable* gUMRunnable =
static_cast<GetUserMediaRunnable*>(runnable.get());
gUMRunnable->Denied();
mActiveCallbacks.Remove(key);
}
return NS_OK;
}
return NS_OK;
}
} // namespace mozilla