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// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_DOM_EME_MEDIA_KEY_SESSION_H_
#define COBALT_DOM_EME_MEDIA_KEY_SESSION_H_
#include <string>
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "cobalt/dom/buffer_source.h"
#include "cobalt/dom/event_target.h"
#include "cobalt/media/base/drm_system.h"
#include "cobalt/script/promise.h"
#include "cobalt/script/script_value_factory.h"
namespace cobalt {
namespace dom {
namespace eme {
// A session provides a context for message exchange with the CDM as a result
// of which keys are made available to the CDM.
// https://www.w3.org/TR/encrypted-media/#key-session
//
// Also see https://www.w3.org/TR/encrypted-media/#mediakeysession-interface.
class MediaKeySession : public EventTarget {
public:
typedef script::ScriptValue<script::Promise<void> > VoidPromiseValue;
typedef base::Callback<void(MediaKeySession* session)> ClosedCallback;
// Custom, not in any spec.
MediaKeySession(scoped_ptr<media::DrmSystem::Session> drm_system_session,
script::ScriptValueFactory* script_value_factory,
const ClosedCallback& closed_callback);
// Web IDL: MediaKeySession.
std::string session_id() const;
const VoidPromiseValue* closed() const;
const EventListenerScriptValue* onmessage() const;
void set_onmessage(const EventListenerScriptValue& event_listener);
scoped_ptr<VoidPromiseValue> GenerateRequest(
const std::string& init_data_type, const BufferSource& init_data);
scoped_ptr<VoidPromiseValue> Update(const BufferSource& response);
scoped_ptr<VoidPromiseValue> Close();
DEFINE_WRAPPABLE_TYPE(MediaKeySession);
private:
~MediaKeySession() OVERRIDE;
void OnSessionUpdateRequestGenerated(
VoidPromiseValue::Reference* promise_reference,
scoped_array<uint8> message, int message_size);
void OnSessionUpdateRequestDidNotGenerate(
VoidPromiseValue::Reference* promise_reference);
void OnSessionUpdated(VoidPromiseValue::Reference* promise_reference);
void OnSessionDidNotUpdate(VoidPromiseValue::Reference* promise_reference);
void OnClosed();
scoped_ptr<media::DrmSystem::Session> drm_system_session_;
script::ScriptValueFactory* const script_value_factory_;
bool uninitialized_;
bool callable_;
// TODO: Remove |closed_callback_| and change call sites to use closed()
// promise instead, once Cobalt switches to native SpiderMonkey
// promises.
const ClosedCallback closed_callback_;
const VoidPromiseValue::Reference closed_promise_reference_;
bool initiated_by_generate_request_;
DISALLOW_COPY_AND_ASSIGN(MediaKeySession);
};
} // namespace eme
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_EME_MEDIA_KEY_SESSION_H_