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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_MEDIA_SESSION_MEDIA_SESSION_H_
#define COBALT_MEDIA_SESSION_MEDIA_SESSION_H_
#include <map>
#include "cobalt/media_session/media_metadata.h"
#include "base/containers/small_map.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/message_loop_proxy.h"
#include "cobalt/media_session/media_session_action.h"
#include "cobalt/media_session/media_session_action_details.h"
#include "cobalt/media_session/media_session_playback_state.h"
#include "cobalt/script/callback_function.h"
#include "cobalt/script/script_value.h"
#include "cobalt/script/wrappable.h"
namespace cobalt {
namespace media_session {
class MediaSessionClient;
class MediaSession : public script::Wrappable {
friend class MediaSessionClient;
public:
typedef script::CallbackFunction<void(
const scoped_refptr<MediaSessionActionDetails>& action_details)>
MediaSessionActionHandler;
typedef script::ScriptValue<MediaSessionActionHandler>
MediaSessionActionHandlerHolder;
typedef script::ScriptValue<MediaSessionActionHandler>::Reference
MediaSessionActionHandlerReference;
private:
typedef base::SmallMap<
std::map<MediaSessionAction, MediaSessionActionHandlerReference*>,
kMediaSessionActionNumActions> ActionMap;
public:
explicit MediaSession(MediaSessionClient* client);
~MediaSession() override;
scoped_refptr<MediaMetadata> metadata() const { return metadata_; }
void set_metadata(scoped_refptr<MediaMetadata> value);
MediaSessionPlaybackState playback_state() const { return state_; }
void set_playback_state(MediaSessionPlaybackState state);
void SetActionHandler(MediaSessionAction action,
const MediaSessionActionHandlerHolder& handler);
DEFINE_WRAPPABLE_TYPE(MediaSession);
void TraceMembers(script::Tracer* tracer) override;
private:
void MaybeQueueChangeTask();
void OnChanged();
ActionMap action_map_;
MediaSessionClient* media_session_client_;
scoped_refptr<MediaMetadata> metadata_;
MediaSessionPlaybackState state_;
scoped_refptr<base::MessageLoopProxy> message_loop_;
bool is_change_task_queued_;
DISALLOW_COPY_AND_ASSIGN(MediaSession);
};
} // namespace media_session
} // namespace cobalt
#endif // COBALT_MEDIA_SESSION_MEDIA_SESSION_H_