text: /*************************************************************************/
  /*  video_stream_webm.h                                                  */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
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  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
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  /* 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,       */
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  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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  /*************************************************************************/
  
  #ifndef VIDEO_STREAM_WEBM_H
  #define VIDEO_STREAM_WEBM_H
  
  #include "core/io/resource_loader.h"
  #include "scene/resources/video_stream.h"
  
  class WebMFrame;
  class WebMDemuxer;
  class VPXDecoder;
  class OpusVorbisDecoder;
  
  class VideoStreamPlaybackWebm : public VideoStreamPlayback {
  
  	GDCLASS(VideoStreamPlaybackWebm, VideoStreamPlayback);
  
  	String file_name;
  	int audio_track;
  
  	WebMDemuxer *webm;
  	VPXDecoder *video;
  	OpusVorbisDecoder *audio;
  
  	WebMFrame **video_frames, *audio_frame;
  	int video_frames_pos, video_frames_capacity;
  
  	int num_decoded_samples, samples_offset;
  	AudioMixCallback mix_callback;
  	void *mix_udata;
  
  	bool playing, paused;
  	double delay_compensation;
  	double time, video_frame_delay, video_pos;
  
  	Vector<uint8_t> frame_data;
  	Ref<ImageTexture> texture;
  
  	float *pcm;
  
  public:
  	VideoStreamPlaybackWebm();
  	~VideoStreamPlaybackWebm();
  
  	bool open_file(const String &p_file);
  
  	virtual void stop();
  	virtual void play();
  
  	virtual bool is_playing() const;
  
  	virtual void set_paused(bool p_paused);
  	virtual bool is_paused() const;
  
  	virtual void set_loop(bool p_enable);
  	virtual bool has_loop() const;
  
  	virtual float get_length() const;
  
  	virtual float get_playback_position() const;
  	virtual void seek(float p_time);
  
  	virtual void set_audio_track(int p_idx);
  
  	virtual Ref<Texture2D> get_texture() const;
  	virtual void update(float p_delta);
  
  	virtual void set_mix_callback(AudioMixCallback p_callback, void *p_userdata);
  	virtual int get_channels() const;
  	virtual int get_mix_rate() const;
  
  private:
  	inline bool has_enough_video_frames() const;
  	bool should_process(WebMFrame &video_frame);
  
  	void delete_pointers();
  };
  
  /**/
  
  class VideoStreamWebm : public VideoStream {
  
  	GDCLASS(VideoStreamWebm, VideoStream);
  
  	String file;
  	int audio_track;
  
  protected:
  	static void _bind_methods();
  
  public:
  	VideoStreamWebm();
  
  	virtual Ref<VideoStreamPlayback> instance_playback();
  
  	virtual void set_file(const String &p_file);
  	String get_file();
  	virtual void set_audio_track(int p_track);
  };
  
  class ResourceFormatLoaderWebm : public ResourceFormatLoader {
  public:
  	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, bool p_no_cache = false);
  	virtual void get_recognized_extensions(List<String> *p_extensions) const;
  	virtual bool handles_type(const String &p_type) const;
  	virtual String get_resource_type(const String &p_path) const;
  };
  
  #endif // VIDEO_STREAM_WEBM_H
  