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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 MediaKeySession_h
#define MediaKeySession_h
#include "bindings/v8/ScriptWrappable.h"
#include "core/dom/ActiveDOMObject.h"
#include "modules/EventTargetModules.h"
#include "platform/Timer.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebContentDecryptionModuleSession.h"
#include "wtf/Deque.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/Uint8Array.h"
#include "wtf/WeakPtr.h"
#include "wtf/text/WTFString.h"
namespace blink {
class WebContentDecryptionModule;
}
namespace WebCore {
class ExceptionState;
class GenericEventQueue;
class MediaKeyError;
class MediaKeys;
// References are held by JS only. However, even if all JS references are
// dropped, it won't be garbage collected until close event received or
// MediaKeys goes away (as determined by the validity of a WeakPtr). This allows
// the CDM to continue to fire events for this session, as long as the session
// is open.
//
// WeakPtr<MediaKeys> is used instead of having MediaKeys and MediaKeySession
// keep references to each other, and then having to inform the other object
// when it gets destroyed.
//
// Because this object controls the lifetime of the WebContentDecryptionModuleSession,
// it may outlive any JavaScript references as long as the MediaKeys object is alive.
// The WebContentDecryptionModuleSession has the same lifetime as this object.
class MediaKeySession FINAL
: public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MediaKeySession>, public ActiveDOMObject, public ScriptWrappable, public EventTargetWithInlineData
, private blink::WebContentDecryptionModuleSession::Client {
DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MediaKeySession>);
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaKeySession);
public:
static MediaKeySession* create(ExecutionContext*, blink::WebContentDecryptionModule*, MediaKeys*);
virtual ~MediaKeySession();
const String& keySystem() const { return m_keySystem; }
String sessionId() const;
void setError(MediaKeyError*);
MediaKeyError* error() { return m_error.get(); }
void initializeNewSession(const String& mimeType, const Uint8Array& initData);
void update(Uint8Array* response, ExceptionState&);
void release(ExceptionState&);
void enqueueEvent(PassRefPtrWillBeRawPtr<Event>);
// EventTarget
virtual const AtomicString& interfaceName() const OVERRIDE;
virtual ExecutionContext* executionContext() const OVERRIDE;
// ActiveDOMObject
virtual bool hasPendingActivity() const OVERRIDE;
virtual void stop() OVERRIDE;
virtual void trace(Visitor*) OVERRIDE;
private:
// A struct holding the pending action.
struct PendingAction {
enum Type {
Update,
Release
};
const Type type;
const RefPtr<Uint8Array> data;
static PassOwnPtr<PendingAction> CreatePendingUpdate(PassRefPtr<Uint8Array> data);
static PassOwnPtr<PendingAction> CreatePendingRelease();
~PendingAction();
private:
PendingAction(Type, PassRefPtr<Uint8Array> data);
};
MediaKeySession(ExecutionContext*, blink::WebContentDecryptionModule*, MediaKeys*);
void actionTimerFired(Timer<MediaKeySession>*);
// blink::WebContentDecryptionModuleSession::Client
virtual void message(const unsigned char* message, size_t messageLength, const blink::WebURL& destinationURL) OVERRIDE;
virtual void ready() OVERRIDE;
virtual void close() OVERRIDE;
virtual void error(MediaKeyErrorCode, unsigned long systemCode) OVERRIDE;
virtual void error(blink::WebContentDecryptionModuleException, unsigned long systemCode, const blink::WebString& errorMessage) OVERRIDE;
String m_keySystem;
RefPtr<MediaKeyError> m_error;
OwnPtrWillBeMember<GenericEventQueue> m_asyncEventQueue;
OwnPtr<blink::WebContentDecryptionModuleSession> m_session;
// Used to determine if MediaKeys is still active.
WeakMember<MediaKeys> m_keys;
// Is the CDM finished with this session?
bool m_isClosed;
Deque<OwnPtr<PendingAction> > m_pendingActions;
Timer<MediaKeySession> m_actionTimer;
};
}
#endif // MediaKeySession_h
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