src/cobalt/media_stream/media_stream_track.h

// Copyright 2018 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_STREAM_MEDIA_STREAM_TRACK_H_
#define COBALT_MEDIA_STREAM_MEDIA_STREAM_TRACK_H_

#include "base/string_piece.h"
#include "cobalt/dom/event_target.h"
#include "cobalt/media_stream/media_track_settings.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:
  // Function exposed to Javascript via IDL.
  const MediaTrackSettings& GetSettings() { return settings_; }

  // The following function is not exposed to Javascript.

  // Returns number of bytes read. If the return value is 0, the user
  // is encouraged to try again later, as there might be no additional
  // data available. Returns a value < 0 on error.
  int64 Read(base::StringPiece output_buffer) {
    UNREFERENCED_PARAMETER(output_buffer);
    NOTIMPLEMENTED();
    return 0;
  }

  DEFINE_WRAPPABLE_TYPE(MediaStreamTrack);

 private:
  MediaStreamTrack(const MediaStreamTrack&) = delete;
  MediaStreamTrack& operator=(const MediaStreamTrack&) = delete;

  MediaTrackSettings settings_;
};

}  // namespace media_stream
}  // namespace cobalt

#endif  // COBALT_MEDIA_STREAM_MEDIA_STREAM_TRACK_H_