chromium/third_party/blink/renderer/modules/mediastream/remote_media_stream_track_adapter.h

// Copyright 2017 The Chromium Authors
// 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_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_

#include "base/check_op.h"
#include "base/dcheck_is_on.h"
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/web/web_frame.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/peerconnection/peer_connection_dependency_factory.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_component_impl.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_source.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/webrtc/api/media_stream_interface.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace blink {

class TrackObserver;

// Base class used for mapping between webrtc and blink MediaStream tracks.
// RemoteMediaStreamImpl has a RemoteMediaStreamTrackAdapter per remote audio
// (RemoteAudioTrackAdapter) and video (RemoteVideoTrackAdapter) track.
template <typename WebRtcMediaStreamTrackType>
class MODULES_EXPORT RemoteMediaStreamTrackAdapter
    : public WTF::ThreadSafeRefCounted<
          RemoteMediaStreamTrackAdapter<WebRtcMediaStreamTrackType>> { … };

class MODULES_EXPORT RemoteVideoTrackAdapter
    : public RemoteMediaStreamTrackAdapter<webrtc::VideoTrackInterface> { … };

// RemoteAudioTrackAdapter is responsible for listening on state
// change notifications on a remote webrtc audio MediaStreamTracks and notify
// Blink.
class MODULES_EXPORT RemoteAudioTrackAdapter
    : public RemoteMediaStreamTrackAdapter<webrtc::AudioTrackInterface>,
      public webrtc::ObserverInterface { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_REMOTE_MEDIA_STREAM_TRACK_ADAPTER_H_