/*
 * libjingle
 * Copyright 2015 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_
#define TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_

#include <string>

#include "talk/app/webrtc/mediastreaminterface.h"
#include "talk/app/webrtc/mediastreamtrack.h"
#include "talk/app/webrtc/notifier.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/scoped_ref_ptr.h"

namespace webrtc {

class RemoteAudioSource;

class RemoteAudioTrack : public MediaStreamTrack<AudioTrackInterface>,
                         public ObserverInterface {
 protected:
  // Protected ctor to force use of factory method.
  RemoteAudioTrack(const std::string& label,
                   const rtc::scoped_refptr<RemoteAudioSource>& source);
  ~RemoteAudioTrack() override;

 public:
  static rtc::scoped_refptr<RemoteAudioTrack> Create(
      const std::string& id,
      const rtc::scoped_refptr<RemoteAudioSource>& source);

 private:
  // MediaStreamTrack implementation.
  std::string kind() const override;

  // AudioTrackInterface implementation.
  AudioSourceInterface* GetSource() const override;

  void AddSink(AudioTrackSinkInterface* sink) override;
  void RemoveSink(AudioTrackSinkInterface* sink) override;
  bool GetSignalLevel(int* level) override;

  // ObserverInterface implementation.
  void OnChanged() override;

 private:
  const rtc::scoped_refptr<RemoteAudioSource> audio_source_;
  RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RemoteAudioTrack);
};

}  // namespace webrtc

#endif  // TALK_APP_WEBRTC_REMOTEAUDIOTRACK_H_