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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_dom_MediaDevices_h
#define mozilla_dom_MediaDevices_h
#include "MediaEventSource.h"
#include "js/RootingAPI.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/UseCounter.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "nsCOMPtr.h"
#include "nsID.h"
#include "nsISupports.h"
#include "nsTHashSet.h"
class AudioDeviceInfo;
namespace mozilla {
class LocalMediaDevice;
class MediaDevice;
class MediaMgrError;
template <typename ResolveValueT, typename RejectValueT, bool IsExclusive>
class MozPromise;
namespace media {
template <typename T>
class Refcountable;
} // namespace media
namespace dom {
class Promise;
struct MediaStreamConstraints;
struct DisplayMediaStreamConstraints;
struct MediaTrackSupportedConstraints;
struct AudioOutputOptions;
class MediaDevices final : public DOMEventTargetHelper {
public:
using SinkInfoPromise = MozPromise<RefPtr<AudioDeviceInfo>, nsresult, true>;
explicit MediaDevices(nsPIDOMWindowInner* aWindow);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaDevices, DOMEventTargetHelper)
JSObject* WrapObject(JSContext* cx,
JS::Handle<JSObject*> aGivenProto) override;
// No code needed, as MediaTrackSupportedConstraints members default to true.
void GetSupportedConstraints(MediaTrackSupportedConstraints& aResult){};
already_AddRefed<Promise> GetUserMedia(
const MediaStreamConstraints& aConstraints, CallerType aCallerType,
ErrorResult& aRv);
already_AddRefed<Promise> EnumerateDevices(ErrorResult& aRv);
already_AddRefed<Promise> GetDisplayMedia(
const DisplayMediaStreamConstraints& aConstraints, CallerType aCallerType,
ErrorResult& aRv);
already_AddRefed<Promise> SelectAudioOutput(
const AudioOutputOptions& aOptions, CallerType aCallerType,
ErrorResult& aRv);
// Get the sink that corresponds to the given device id.
// The returned promise will be resolved with the device
// information if the aDeviceId matches a device that would be exposed by
// enumerateDevices().
// The promise will be rejected with NS_ERROR_NOT_AVAILABLE if aDeviceId
// does not match any exposed device.
RefPtr<SinkInfoPromise> GetSinkDevice(const nsString& aDeviceId);
// Called when MediaManager encountered a change in its device lists.
void OnDeviceChange();
void SetupDeviceChangeListener();
mozilla::dom::EventHandlerNonNull* GetOndevicechange();
void SetOndevicechange(mozilla::dom::EventHandlerNonNull* aCallback);
void EventListenerAdded(nsAtom* aType) override;
using DOMEventTargetHelper::EventListenerAdded;
void BackgroundStateChanged() { MaybeResumeDeviceExposure(); }
void WindowResumed() { MaybeResumeDeviceExposure(); }
void BrowserWindowBecameActive() { MaybeResumeDeviceExposure(); }
private:
using MediaDeviceSet = nsTArray<RefPtr<MediaDevice>>;
using MediaDeviceSetRefCnt = media::Refcountable<MediaDeviceSet>;
using LocalMediaDeviceSet = nsTArray<RefPtr<LocalMediaDevice>>;
virtual ~MediaDevices();
void MaybeResumeDeviceExposure();
void ResumeEnumerateDevices(
nsTArray<RefPtr<Promise>>&& aPromises,
RefPtr<const MediaDeviceSetRefCnt> aExposedDevices) const;
RefPtr<MediaDeviceSetRefCnt> FilterExposedDevices(
const MediaDeviceSet& aDevices) const;
bool ShouldQueueDeviceChange(const MediaDeviceSet& aExposedDevices) const;
void ResolveEnumerateDevicesPromise(
Promise* aPromise, const LocalMediaDeviceSet& aDevices) const;
nsTHashSet<nsString> mExplicitlyGrantedAudioOutputRawIds;
nsTArray<RefPtr<Promise>> mPendingEnumerateDevicesPromises;
// Set only once, if and when required.
mutable nsString mDefaultOutputLabel;
// Connect/Disconnect on main thread only
MediaEventListener mDeviceChangeListener;
// Ordered set of the system physical devices when devicechange event
// decisions were last performed.
RefPtr<const MediaDeviceSetRefCnt> mLastPhysicalDevices;
bool mIsDeviceChangeListenerSetUp = false;
bool mHaveUnprocessedDeviceListChange = false;
bool mCanExposeMicrophoneInfo = false;
bool mCanExposeCameraInfo = false;
void RecordAccessTelemetry(const UseCounter counter) const;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_MediaDevices_h
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