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// Copyright 2018 The Cobalt Authors. 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_STREAM_MEDIA_STREAM_TRACK_H_
#define COBALT_MEDIA_STREAM_MEDIA_STREAM_TRACK_H_
#include "base/callback.h"
#include "base/strings/string_piece.h"
#include "cobalt/dom/event_target.h"
#include "cobalt/media_stream/media_track_settings.h"
#include "cobalt/script/environment_settings.h"
#include "starboard/common/mutex.h"
namespace cobalt {
namespace media_stream {
// This class represents a MediaStreamTrack, and implements the specification
// at: https://www.w3.org/TR/mediacapture-streams/#dom-mediastreamtrack
class MediaStreamTrack : public dom::EventTarget {
public:
enum ReadyState {
kReadyStateLive,
kReadyStateEnded,
};
explicit MediaStreamTrack(script::EnvironmentSettings* settings)
: EventTarget(settings) {}
// Function exposed to JavaScript via IDL.
const MediaTrackSettings& GetSettings() const {
starboard::ScopedLock lock(settings_mutex_);
return settings_;
}
const MediaTrackSettings& GetMediaTrackSettings() const {
return GetSettings();
}
virtual void Stop() = 0;
virtual void OnReadyStateChanged(
media_stream::MediaStreamTrack::ReadyState new_state) = 0;
void SetMediaTrackSettings(const MediaTrackSettings& new_settings) {
starboard::ScopedLock lock(settings_mutex_);
settings_ = new_settings;
}
DEFINE_WRAPPABLE_TYPE(MediaStreamTrack);
private:
MediaStreamTrack(const MediaStreamTrack&) = delete;
MediaStreamTrack& operator=(const MediaStreamTrack&) = delete;
starboard::Mutex settings_mutex_;
MediaTrackSettings settings_;
};
} // namespace media_stream
} // namespace cobalt
#endif // COBALT_MEDIA_STREAM_MEDIA_STREAM_TRACK_H_