chromium/src/third_party/blink/renderer/modules/mediastream/video_track_signal_underlying_sink.h

// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_VIDEO_TRACK_SIGNAL_UNDERLYING_SINK_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_VIDEO_TRACK_SIGNAL_UNDERLYING_SINK_H_

#include "third_party/blink/renderer/core/streams/underlying_sink_base.h"
#include "third_party/blink/renderer/modules/modules_export.h"

namespace blink {

class MediaStreamTrack;
class MediaStreamVideoSource;

class MODULES_EXPORT VideoTrackSignalUnderlyingSink
    : public UnderlyingSinkBase {
 public:
  // |source| must outlive this MediaStreamVideoTrackUnderlyingSink.
  explicit VideoTrackSignalUnderlyingSink(MediaStreamTrack* track);

  // UnderlyingSinkBase overrides.
  ScriptPromise start(ScriptState* script_state,
                      WritableStreamDefaultController* controller,
                      ExceptionState& exception_state) override;
  ScriptPromise write(ScriptState* script_state,
                      ScriptValue chunk,
                      WritableStreamDefaultController* controller,
                      ExceptionState& exception_state) override;
  ScriptPromise abort(ScriptState* script_state,
                      ScriptValue reason,
                      ExceptionState& exception_state) override;
  ScriptPromise close(ScriptState* script_state,
                      ExceptionState& exception_state) override;
  void Trace(Visitor* visitor) const override;

 private:
  WeakMember<MediaStreamTrack> track_;
  base::WeakPtr<MediaStreamVideoSource> source_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_VIDEO_TRACK_SIGNAL_UNDERLYING_SINK_H_