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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ENCRYPTEDMEDIA_MEDIA_KEYS_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ENCRYPTEDMEDIA_MEDIA_KEYS_H_
#include <memory>
#include <vector>
#include "third_party/blink/public/platform/web_content_decryption_module.h"
#include "third_party/blink/public/platform/web_encrypted_media_types.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_piece.h"
#include "third_party/blink/renderer/modules/encryptedmedia/encrypted_media_utils.h"
#include "third_party/blink/renderer/platform/allow_discouraged_type.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_deque.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/timer.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class ExceptionState;
class ExecutionContext;
class HTMLMediaElement;
class MediaKeysPolicy;
class MediaKeySession;
class ScriptState;
class V8MediaKeySessionType;
class V8MediaKeyStatus;
class WebContentDecryptionModule;
// References are held by JS and HTMLMediaElement.
// The WebContentDecryptionModule has the same lifetime as this object.
class MediaKeys : public ScriptWrappable,
public ActiveScriptWrappable<MediaKeys>,
public ExecutionContextLifecycleObserver {
DEFINE_WRAPPERTYPEINFO();
public:
MediaKeys(
ExecutionContext*,
const std::vector<WebEncryptedMediaSessionType>& supported_session_types,
std::unique_ptr<WebContentDecryptionModule>,
const MediaKeysConfig&);
~MediaKeys() override;
MediaKeySession* createSession(ScriptState*,
const V8MediaKeySessionType& session_type,
ExceptionState&);
ScriptPromise<IDLBoolean> setServerCertificate(
ScriptState*,
const DOMArrayPiece& server_certificate,
ExceptionState&);
ScriptPromise<V8MediaKeyStatus> getStatusForPolicy(ScriptState*,
const MediaKeysPolicy*,
ExceptionState&);
// Indicates that the provided HTMLMediaElement wants to use this object.
// Returns true if no other HTMLMediaElement currently references this
// object, false otherwise. If true, will take a weak reference to
// HTMLMediaElement and expects the reservation to be accepted/cancelled
// later.
bool ReserveForMediaElement(HTMLMediaElement*);
// Indicates that SetMediaKeys completed successfully.
void AcceptReservation();
// Indicates that SetMediaKeys failed, so HTMLMediaElement did not
// successfully link to this object.
void CancelReservation();
// The previously reserved and accepted HTMLMediaElement is no longer
// using this object.
void ClearMediaElement();
WebContentDecryptionModule* ContentDecryptionModule();
void Trace(Visitor*) const override;
// ExecutionContextLifecycleObserver implementation.
// FIXME: This class could derive from ExecutionContextLifecycleObserver
// again (http://crbug.com/483722).
void ContextDestroyed() override;
// ScriptWrappable implementation.
bool HasPendingActivity() const final;
private:
class PendingAction;
void SetServerCertificateTask(DOMArrayBuffer* server_certificate,
ContentDecryptionModuleResult*);
void GetStatusForPolicyTask(const String& min_hdcp_version,
ContentDecryptionModuleResult*);
bool SessionTypeSupported(WebEncryptedMediaSessionType);
void TimerFired(TimerBase*);
const std::vector<WebEncryptedMediaSessionType> supported_session_types_
ALLOW_DISCOURAGED_TYPE("Matches WebMediaKeySystemConfiguration");
std::unique_ptr<WebContentDecryptionModule> cdm_;
const MediaKeysConfig config_;
// Keep track of the HTMLMediaElement that references this object. Keeping
// a WeakMember so that HTMLMediaElement's lifetime isn't dependent on
// this object.
// Note that the referenced HTMLMediaElement must be destroyed
// before this object. This is due to WebMediaPlayerImpl (owned by
// HTMLMediaElement) possibly having a pointer to Decryptor created
// by WebContentDecryptionModuleImpl (owned by this object).
WeakMember<HTMLMediaElement> media_element_;
// Keep track of whether this object has been reserved by HTMLMediaElement
// (i.e. a setMediaKeys operation is in progress). Destruction of this
// object will be prevented until the setMediaKeys() completes.
bool reserved_for_media_element_;
HeapDeque<Member<PendingAction>> pending_actions_;
HeapTaskRunnerTimer<MediaKeys> timer_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_ENCRYPTEDMEDIA_MEDIA_KEYS_H_
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