text: /*************************************************************************/
  /*  av_stream_webm.cpp.cpp                                              */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                    http://www.godotengine.org                         */
  /*************************************************************************/
  /* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
  /*                                                                       */
  /* 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.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  #include "scene/resources/video_stream.h"
  #include "io/resource_loader.h"
  
  class WebMFrame;
  class WebMDemuxer;
  class VPXDecoder;
  class OpusVorbisDecoder;
  
  class VideoStreamPlaybackWebm : public VideoStreamPlayback {
  
  	OBJ_TYPE(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;
  
  	DVector<uint8_t> frame_data;
  	Ref<ImageTexture> texture;
  
  	int16_t *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(bool p_paused) const;
  
  	virtual void set_loop(bool p_enable);
  	virtual bool has_loop() const;
  
  	virtual float get_length() const;
  
  	virtual float get_pos() const;
  	virtual void seek_pos(float p_time);
  
  	virtual void set_audio_track(int p_idx);
  
  	virtual Ref<Texture> get_texture();
  	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;
  
  	void delete_pointers();
  };
  
  /**/
  
  class VideoStreamWebm : public VideoStream {
  
  	OBJ_TYPE(VideoStreamWebm, VideoStream)
  
  	String file;
  	int audio_track;
  
  public:
  	VideoStreamWebm();
  
  	virtual Ref<VideoStreamPlayback> instance_playback();
  
  	virtual void set_file(const String &p_file);
  	virtual void set_audio_track(int p_track);
  };
  
  /**/
  
  class ResourceFormatLoaderVideoStreamWebm : public ResourceFormatLoader {
  
  public:
  	virtual RES load(const String &p_path, const String &p_original_path, Error *r_error);
  	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;
  };
  