Add m-esr52 at 52.6.0

1 files changed, 300 insertions, 0 deletions

diff --git a/dom/media/MediaDevices.cpp b/dom/media/MediaDevices.cpp
new file mode 100644
index 0000000000..197cfa2205
--- /dev/null
+++ b/dom/media/MediaDevices.cpp
@@ -0,0 +1,300 @@
+/* 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 "mozilla/dom/MediaDevices.h"
+#include "mozilla/dom/MediaStreamBinding.h"
+#include "mozilla/dom/MediaDeviceInfo.h"
+#include "mozilla/dom/MediaDevicesBinding.h"
+#include "mozilla/dom/Promise.h"
+#include "mozilla/MediaManager.h"
+#include "MediaTrackConstraints.h"
+#include "nsIEventTarget.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsIPermissionManager.h"
+#include "nsPIDOMWindow.h"
+#include "nsQueryObject.h"
+
+#define DEVICECHANGE_HOLD_TIME_IN_MS 1000
+
+namespace mozilla {
+namespace dom {
+
+class FuzzTimerCallBack final : public nsITimerCallback
+{
+  ~FuzzTimerCallBack() {}
+
+public:
+  explicit FuzzTimerCallBack(MediaDevices* aMediaDevices) : mMediaDevices(aMediaDevices) {}
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD Notify(nsITimer* aTimer) final
+  {
+    mMediaDevices->DispatchTrustedEvent(NS_LITERAL_STRING("devicechange"));
+    return NS_OK;
+  }
+
+private:
+  nsCOMPtr<MediaDevices> mMediaDevices;
+};
+
+NS_IMPL_ISUPPORTS(FuzzTimerCallBack, nsITimerCallback)
+
+class MediaDevices::GumResolver : public nsIDOMGetUserMediaSuccessCallback
+{
+public:
+  NS_DECL_ISUPPORTS
+
+  explicit GumResolver(Promise* aPromise) : mPromise(aPromise) {}
+
+  NS_IMETHOD
+  OnSuccess(nsISupports* aStream) override
+  {
+    RefPtr<DOMMediaStream> stream = do_QueryObject(aStream);
+    if (!stream) {
+      return NS_ERROR_FAILURE;
+    }
+    mPromise->MaybeResolve(stream);
+    return NS_OK;
+  }
+
+private:
+  virtual ~GumResolver() {}
+  RefPtr<Promise> mPromise;
+};
+
+class MediaDevices::EnumDevResolver : public nsIGetUserMediaDevicesSuccessCallback
+{
+public:
+  NS_DECL_ISUPPORTS
+
+  EnumDevResolver(Promise* aPromise, uint64_t aWindowId)
+  : mPromise(aPromise), mWindowId(aWindowId) {}
+
+  NS_IMETHOD
+  OnSuccess(nsIVariant* aDevices) override
+  {
+    // Cribbed from MediaPermissionGonk.cpp
+
+    // Create array for nsIMediaDevice
+    nsTArray<nsCOMPtr<nsIMediaDevice>> devices;
+    // Contain the fumes
+    {
+      uint16_t vtype;
+      nsresult rv = aDevices->GetDataType(&vtype);
+      NS_ENSURE_SUCCESS(rv, rv);
+      if (vtype != nsIDataType::VTYPE_EMPTY_ARRAY) {
+        nsIID elementIID;
+        uint16_t elementType;
+        void* rawArray;
+        uint32_t arrayLen;
+        rv = aDevices->GetAsArray(&elementType, &elementIID, &arrayLen, &rawArray);
+        NS_ENSURE_SUCCESS(rv, rv);
+        if (elementType != nsIDataType::VTYPE_INTERFACE) {
+          free(rawArray);
+          return NS_ERROR_FAILURE;
+        }
+
+        nsISupports **supportsArray = reinterpret_cast<nsISupports **>(rawArray);
+        for (uint32_t i = 0; i < arrayLen; ++i) {
+          nsCOMPtr<nsIMediaDevice> device(do_QueryInterface(supportsArray[i]));
+          devices.AppendElement(device);
+          NS_IF_RELEASE(supportsArray[i]); // explicitly decrease refcount for rawptr
+        }
+        free(rawArray); // explicitly free memory from nsIVariant::GetAsArray
+      }
+    }
+    nsTArray<RefPtr<MediaDeviceInfo>> infos;
+    for (auto& device : devices) {
+      nsString type;
+      device->GetType(type);
+      bool isVideo = type.EqualsLiteral("video");
+      bool isAudio = type.EqualsLiteral("audio");
+      if (isVideo || isAudio) {
+        MediaDeviceKind kind = isVideo ?
+            MediaDeviceKind::Videoinput : MediaDeviceKind::Audioinput;
+        nsString id;
+        nsString name;
+        device->GetId(id);
+        // Include name only if page currently has a gUM stream active or
+        // persistent permissions (audio or video) have been granted
+        if (MediaManager::Get()->IsActivelyCapturingOrHasAPermission(mWindowId) ||
+            Preferences::GetBool("media.navigator.permission.disabled", false)) {
+          device->GetName(name);
+        }
+        RefPtr<MediaDeviceInfo> info = new MediaDeviceInfo(id, kind, name);
+        infos.AppendElement(info);
+      }
+    }
+    mPromise->MaybeResolve(infos);
+    return NS_OK;
+  }
+
+private:
+  virtual ~EnumDevResolver() {}
+  RefPtr<Promise> mPromise;
+  uint64_t mWindowId;
+};
+
+class MediaDevices::GumRejecter : public nsIDOMGetUserMediaErrorCallback
+{
+public:
+  NS_DECL_ISUPPORTS
+
+  explicit GumRejecter(Promise* aPromise) : mPromise(aPromise) {}
+
+  NS_IMETHOD
+  OnError(nsISupports* aError) override
+  {
+    RefPtr<MediaStreamError> error = do_QueryObject(aError);
+    if (!error) {
+      return NS_ERROR_FAILURE;
+    }
+    mPromise->MaybeReject(error);
+    return NS_OK;
+  }
+
+private:
+  virtual ~GumRejecter() {}
+  RefPtr<Promise> mPromise;
+};
+
+MediaDevices::~MediaDevices()
+{
+  MediaManager* mediamanager = MediaManager::GetIfExists();
+  if (mediamanager) {
+    mediamanager->RemoveDeviceChangeCallback(this);
+  }
+}
+
+NS_IMPL_ISUPPORTS(MediaDevices::GumResolver, nsIDOMGetUserMediaSuccessCallback)
+NS_IMPL_ISUPPORTS(MediaDevices::EnumDevResolver, nsIGetUserMediaDevicesSuccessCallback)
+NS_IMPL_ISUPPORTS(MediaDevices::GumRejecter, nsIDOMGetUserMediaErrorCallback)
+
+already_AddRefed<Promise>
+MediaDevices::GetUserMedia(const MediaStreamConstraints& aConstraints,
+                           ErrorResult &aRv)
+{
+  nsPIDOMWindowInner* window = GetOwner();
+  nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(window);
+  RefPtr<Promise> p = Promise::Create(go, aRv);
+  NS_ENSURE_TRUE(!aRv.Failed(), nullptr);
+
+  RefPtr<GumResolver> resolver = new GumResolver(p);
+  RefPtr<GumRejecter> rejecter = new GumRejecter(p);
+
+  aRv = MediaManager::Get()->GetUserMedia(window, aConstraints,
+                                          resolver, rejecter);
+  return p.forget();
+}
+
+already_AddRefed<Promise>
+MediaDevices::EnumerateDevices(ErrorResult &aRv)
+{
+  nsPIDOMWindowInner* window = GetOwner();
+  nsCOMPtr<nsIGlobalObject> go = do_QueryInterface(window);
+  RefPtr<Promise> p = Promise::Create(go, aRv);
+  NS_ENSURE_TRUE(!aRv.Failed(), nullptr);
+
+  RefPtr<EnumDevResolver> resolver = new EnumDevResolver(p, window->WindowID());
+  RefPtr<GumRejecter> rejecter = new GumRejecter(p);
+
+  aRv = MediaManager::Get()->EnumerateDevices(window, resolver, rejecter);
+  return p.forget();
+}
+
+NS_IMPL_ADDREF_INHERITED(MediaDevices, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(MediaDevices, DOMEventTargetHelper)
+NS_INTERFACE_MAP_BEGIN(MediaDevices)
+  NS_INTERFACE_MAP_ENTRY(MediaDevices)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+void
+MediaDevices::OnDeviceChange()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  nsresult rv = CheckInnerWindowCorrectness();
+  if (NS_FAILED(rv)) {
+    MOZ_ASSERT(false);
+    return;
+  }
+
+  if (!(MediaManager::Get()->IsActivelyCapturingOrHasAPermission(GetOwner()->WindowID()) ||
+    Preferences::GetBool("media.navigator.permission.disabled", false))) {
+    return;
+  }
+
+  if (!mFuzzTimer)
+  {
+    mFuzzTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
+  }
+
+  if (!mFuzzTimer) {
+    MOZ_ASSERT(false);
+    return;
+  }
+
+  mFuzzTimer->Cancel();
+  RefPtr<FuzzTimerCallBack> cb = new FuzzTimerCallBack(this);
+  mFuzzTimer->InitWithCallback(cb, DEVICECHANGE_HOLD_TIME_IN_MS, nsITimer::TYPE_ONE_SHOT);
+}
+
+mozilla::dom::EventHandlerNonNull*
+MediaDevices::GetOndevicechange()
+{
+  if (NS_IsMainThread()) {
+    return GetEventHandler(nsGkAtoms::ondevicechange, EmptyString());
+  }
+  return GetEventHandler(nullptr, NS_LITERAL_STRING("devicechange"));
+}
+
+void
+MediaDevices::SetOndevicechange(mozilla::dom::EventHandlerNonNull* aCallback)
+{
+  if (NS_IsMainThread()) {
+    SetEventHandler(nsGkAtoms::ondevicechange, EmptyString(), aCallback);
+  } else {
+    SetEventHandler(nullptr, NS_LITERAL_STRING("devicechange"), aCallback);
+  }
+
+  MediaManager::Get()->AddDeviceChangeCallback(this);
+}
+
+nsresult
+MediaDevices::AddEventListener(const nsAString& aType,
+  nsIDOMEventListener* aListener,
+  bool aUseCapture, bool aWantsUntrusted,
+  uint8_t optional_argc)
+{
+  MediaManager::Get()->AddDeviceChangeCallback(this);
+
+  return mozilla::DOMEventTargetHelper::AddEventListener(aType, aListener,
+    aUseCapture,
+    aWantsUntrusted,
+    optional_argc);
+}
+
+void
+MediaDevices::AddEventListener(const nsAString& aType,
+  dom::EventListener* aListener,
+  const dom::AddEventListenerOptionsOrBoolean& aOptions,
+  const dom::Nullable<bool>& aWantsUntrusted,
+  ErrorResult& aRv)
+{
+  MediaManager::Get()->AddDeviceChangeCallback(this);
+
+  return mozilla::DOMEventTargetHelper::AddEventListener(aType, aListener,
+    aOptions,
+    aWantsUntrusted,
+    aRv);
+}
+
+JSObject*
+MediaDevices::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return MediaDevicesBinding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace dom
+} // namespace mozilla