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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.
*/
#include "config.h"
#include "MediaKeys.h"
#if ENABLE(ENCRYPTED_MEDIA_V2)
#include "CDM.h"
#include "EventNames.h"
#include "HTMLMediaElement.h"
#include "MediaKeyMessageEvent.h"
#include "MediaKeySession.h"
#include "UUID.h"
#include <wtf/HashSet.h>
namespace WebCore {
PassRefPtr<MediaKeys> MediaKeys::create(const String& keySystem, ExceptionCode& ec)
{
// From <http://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media.html#dom-media-keys-constructor>:
// The MediaKeys(keySystem) constructor must run the following steps:
// 1. If keySystem is null or an empty string, throw an INVALID_ACCESS_ERR exception and abort these steps.
if (keySystem.isNull() || keySystem.isEmpty()) {
ec = INVALID_ACCESS_ERR;
return 0;
}
// 2. If keySystem is not one of the user agent's supported Key Systems, throw a NOT_SUPPORTED_ERR and abort these steps.
if (!CDM::supportsKeySystem(keySystem)) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
// 3. Let cdm be the content decryption module corresponding to keySystem.
// 4. Load cdm if necessary.
OwnPtr<CDM> cdm = CDM::create(keySystem);
// 5. Create a new MediaKeys object.
// 5.1 Let the keySystem attribute be keySystem.
// 6. Return the new object to the caller.
return adoptRef(new MediaKeys(keySystem, cdm.release()));
}
MediaKeys::MediaKeys(const String& keySystem, PassOwnPtr<CDM> cdm)
: m_mediaElement(0)
, m_keySystem(keySystem)
, m_cdm(cdm)
{
m_cdm->setClient(this);
}
MediaKeys::~MediaKeys()
{
// From <http://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media.html#dom-media-keys-constructor>:
// When destroying a MediaKeys object, follow the steps in close().
for (size_t i = 0; i < m_sessions.size(); ++i) {
m_sessions[i]->close();
m_sessions[i]->setKeys(0);
}
}
PassRefPtr<MediaKeySession> MediaKeys::createSession(ScriptExecutionContext* context, const String& type, Uint8Array* initData, ExceptionCode& ec)
{
// From <http://dvcs.w3.org/hg/html-media/raw-file/tip/encrypted-media/encrypted-media.html#dom-createsession>:
// The createSession(type, initData) method must run the following steps:
// Note: The contents of initData are container-specific Initialization Data.
// 1. If type is null or an empty string and initData is not null or an empty string, throw an
// INVALID_ACCESS_ERR exception and abort these steps.
if ((type.isNull() || type.isEmpty()) && (!initData || initData->length())) {
ec = INVALID_ACCESS_ERR;
return 0;
}
// 2. If type contains a MIME type that is not supported or is not supported by the keySystem, throw
// a NOT_SUPPORTED_ERR exception and abort these steps.
if (!type.isNull() && !type.isEmpty() && !m_cdm->supportsMIMEType(type)) {
ec = NOT_SUPPORTED_ERR;
return 0;
}
// 3. Create a new MediaKeySession object.
// 3.1 Let the keySystem attribute be keySystem.
// 3.2 Let the sessionId attribute be a unique Session ID string. It may be generated by cdm.
RefPtr<MediaKeySession> session = MediaKeySession::create(context, this, keySystem());
// 4. Add the new object to an internal list of session objects.
m_sessions.append(session);
// 5. Schedule a task to generate a key request, providing type, initData, and the new object.
session->generateKeyRequest(type, initData);
// 6. Return the new object to the caller.
return session;
}
void MediaKeys::setMediaElement(HTMLMediaElement* element)
{
m_mediaElement = element;
}
MediaPlayer* MediaKeys::cdmMediaPlayer(const CDM*) const
{
if (m_mediaElement)
return m_mediaElement->player();
return 0;
}
}
#endif
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