text: /*************************************************************************/
  /*  video_stream.h                                                       */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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  /*************************************************************************/
  
  #ifndef VIDEO_STREAM_H
  #define VIDEO_STREAM_H
  
  #include "scene/resources/texture.h"
  
  class VideoStreamPlayback : public Resource {
  
      GDCLASS(VideoStreamPlayback,Resource)
  
  public:
      using AudioMixCallback = int (*)(void *, const float *, int);
  
      virtual void stop() = 0;
      virtual void play() = 0;
  
      virtual bool is_playing() const = 0;
  
      virtual void set_paused(bool p_paused) = 0;
      virtual bool is_paused() const = 0;
  
      virtual void set_loop(bool p_enable) = 0;
      virtual bool has_loop() const = 0;
  
      virtual float get_length() const = 0;
  
      virtual float get_playback_position() const = 0;
      virtual void seek(float p_time) = 0;
  
      virtual void set_audio_track(int p_idx) = 0;
  
      virtual Ref<Texture> get_texture() const = 0;
      virtual void update(float p_delta) = 0;
  
      virtual void set_mix_callback(AudioMixCallback p_callback, void *p_userdata) = 0;
      virtual int get_channels() const = 0;
      virtual int get_mix_rate() const = 0;
  
      VideoStreamPlayback() {}
  };
  
  class VideoStream : public Resource {
  
      GDCLASS(VideoStream,Resource)
  
      OBJ_SAVE_TYPE(VideoStream) //children are all saved as AudioStream, so they can be exchanged
  
  public:
      virtual void set_audio_track(int p_track) = 0;
      virtual Ref<VideoStreamPlayback> instance_playback() = 0;
  
      VideoStream() {}
  };
  
  #endif
  