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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_mediakeys_h__
#define mozilla_dom_mediakeys_h__
#include "nsWrapperCache.h"
#include "nsISupports.h"
#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsRefPtrHashtable.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/MediaKeysBinding.h"
#include "mozilla/dom/MediaKeySystemAccessBinding.h"
#include "mozIGeckoMediaPluginService.h"
#include "mozilla/DetailedPromise.h"
#include "mozilla/WeakPtr.h"
namespace mozilla {
class CDMProxy;
namespace dom {
class ArrayBufferViewOrArrayBuffer;
class MediaKeySession;
class HTMLMediaElement;
typedef nsRefPtrHashtable<nsStringHashKey, MediaKeySession> KeySessionHashMap;
typedef nsRefPtrHashtable<nsUint32HashKey, dom::DetailedPromise> PromiseHashMap;
typedef nsRefPtrHashtable<nsUint32HashKey, MediaKeySession> PendingKeySessionsHashMap;
typedef nsDataHashtable<nsUint32HashKey, uint32_t> PendingPromiseIdTokenHashMap;
typedef uint32_t PromiseId;
// This class is used on the main thread only.
// Note: its addref/release is not (and can't be) thread safe!
class MediaKeys final : public nsISupports,
public nsWrapperCache,
public SupportsWeakPtr<MediaKeys>
{
~MediaKeys();
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(MediaKeys)
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(MediaKeys)
MediaKeys(nsPIDOMWindowInner* aParentWindow,
const nsAString& aKeySystem,
const MediaKeySystemConfiguration& aConfig);
already_AddRefed<DetailedPromise> Init(ErrorResult& aRv);
nsPIDOMWindowInner* GetParentObject() const;
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
nsresult Bind(HTMLMediaElement* aElement);
void Unbind();
// Javascript: readonly attribute DOMString keySystem;
void GetKeySystem(nsString& retval) const;
// JavaScript: MediaKeys.createSession()
already_AddRefed<MediaKeySession> CreateSession(JSContext* aCx,
MediaKeySessionType aSessionType,
ErrorResult& aRv);
// JavaScript: MediaKeys.SetServerCertificate()
already_AddRefed<DetailedPromise>
SetServerCertificate(const ArrayBufferViewOrArrayBuffer& aServerCertificate,
ErrorResult& aRv);
already_AddRefed<MediaKeySession> GetSession(const nsAString& aSessionId);
// Removes and returns MediaKeySession from the set of sessions awaiting
// their sessionId to be assigned.
already_AddRefed<MediaKeySession> GetPendingSession(uint32_t aToken);
// Called once a Init() operation succeeds.
void OnCDMCreated(PromiseId aId,
const nsACString& aNodeId, const uint32_t aPluginId);
// Called once the CDM generates a sessionId while servicing a
// MediaKeySession.generateRequest() or MediaKeySession.load() call,
// once the sessionId of a MediaKeySession is known.
void OnSessionIdReady(MediaKeySession* aSession);
// Called once a LoadSession succeeds.
void OnSessionLoaded(PromiseId aId, bool aSuccess);
// Called once a session has closed.
void OnSessionClosed(MediaKeySession* aSession);
CDMProxy* GetCDMProxy() { return mProxy; }
// Makes a new promise, or nullptr on failure.
already_AddRefed<DetailedPromise> MakePromise(ErrorResult& aRv,
const nsACString& aName);
// Stores promise in mPromises, returning an ID that can be used to retrieve
// it later. The ID is passed to the CDM, so that it can signal specific
// promises to be resolved.
PromiseId StorePromise(DetailedPromise* aPromise);
// Stores a map from promise id to pending session token. Using this
// mapping, when a promise is rejected via its ID, we can check if the
// promise corresponds to a pending session and retrieve that session
// via the mapped-to token, and remove the pending session from the
// list of sessions awaiting a session id.
void ConnectPendingPromiseIdWithToken(PromiseId aId, uint32_t aToken);
// Reject promise with DOMException corresponding to aExceptionCode.
void RejectPromise(PromiseId aId, nsresult aExceptionCode,
const nsCString& aReason);
// Resolves promise with "undefined".
void ResolvePromise(PromiseId aId);
const nsCString& GetNodeId() const;
void Shutdown();
// Called by CDMProxy when CDM crashes or shuts down. It is different from
// Shutdown which is called from the script/dom side.
void Terminated();
// Returns true if this MediaKeys has been bound to a media element.
bool IsBoundToMediaElement() const;
private:
// Instantiate CDMProxy instance.
// It could be MediaDrmCDMProxy (Widevine on Fennec) or GMPCDMProxy (the rest).
already_AddRefed<CDMProxy> CreateCDMProxy();
// Removes promise from mPromises, and returns it.
already_AddRefed<DetailedPromise> RetrievePromise(PromiseId aId);
// Owning ref to proxy. The proxy has a weak reference back to the MediaKeys,
// and the MediaKeys destructor clears the proxy's reference to the MediaKeys.
RefPtr<CDMProxy> mProxy;
RefPtr<HTMLMediaElement> mElement;
nsCOMPtr<nsPIDOMWindowInner> mParent;
const nsString mKeySystem;
nsCString mNodeId;
KeySessionHashMap mKeySessions;
PromiseHashMap mPromises;
PendingKeySessionsHashMap mPendingSessions;
PromiseId mCreatePromiseId;
RefPtr<nsIPrincipal> mPrincipal;
RefPtr<nsIPrincipal> mTopLevelPrincipal;
const MediaKeySystemConfiguration mConfig;
PendingPromiseIdTokenHashMap mPromiseIdToken;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_mediakeys_h__
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