/*************************************************************************/
/*  video_stream_theora.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 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   */
/* 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 */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/*************************************************************************/
#ifndef VIDEO_STREAM_THEORA_H
#define VIDEO_STREAM_THEORA_H

#include "io/resource_loader.h"
#include "os/file_access.h"
#include "os/semaphore.h"
#include "os/thread.h"
#include "ring_buffer.h"
#include "scene/resources/video_stream.h"

#include <theora/theoradec.h>
#include <vorbis/codec.h>

//#define THEORA_USE_THREAD_STREAMING

class VideoStreamPlaybackTheora : public VideoStreamPlayback {

	OBJ_TYPE(VideoStreamPlaybackTheora, VideoStreamPlayback);

	enum {
		MAX_FRAMES = 4,
	};

	//Image frames[MAX_FRAMES];
	Image::Format format;
	DVector<uint8_t> frame_data;
	int frames_pending;
	FileAccess *file;
	String file_name;
	int audio_frames_wrote;
	Point2i size;

	int buffer_data();
	int queue_page(ogg_page *page);
	void video_write(void);
	float get_time() const;

	bool theora_eos;
	bool vorbis_eos;

	ogg_sync_state oy;
	ogg_page og;
	ogg_stream_state vo;
	ogg_stream_state to;
	th_info ti;
	th_comment tc;
	th_dec_ctx *td;
	vorbis_info vi;
	vorbis_dsp_state vd;
	vorbis_block vb;
	vorbis_comment vc;
	th_pixel_fmt px_fmt;
	double videobuf_time;
	int pp_inc;

	int theora_p;
	int vorbis_p;
	int pp_level_max;
	int pp_level;
	int videobuf_ready;

	bool playing;
	bool buffering;

	double last_update_time;
	double time;
	double delay_compensation;

	Ref<ImageTexture> texture;

	AudioMixCallback mix_callback;
	void *mix_udata;
	bool paused;

#ifdef THEORA_USE_THREAD_STREAMING

	enum {
		RB_SIZE_KB = 1024
	};

	RingBuffer<uint8_t> ring_buffer;
	Vector<uint8_t> read_buffer;
	bool thread_eof;
	Semaphore *thread_sem;
	Thread *thread;
	volatile bool thread_exit;

	static void _streaming_thread(void *ud);

#endif

	int audio_track;

protected:
	void clear();

public:
	virtual void play();
	virtual void stop();
	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 String get_stream_name() const;

	virtual int get_loop_count() const;

	virtual float get_pos() const;
	virtual void seek_pos(float p_time);

	void set_file(const String &p_file);

	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;

	virtual void set_audio_track(int p_idx);

	VideoStreamPlaybackTheora();
	~VideoStreamPlaybackTheora();
};

class VideoStreamTheora : public VideoStream {

	OBJ_TYPE(VideoStreamTheora, VideoStream);

	String file;
	int audio_track;

public:
	Ref<VideoStreamPlayback> instance_playback() {
		Ref<VideoStreamPlaybackTheora> pb = memnew(VideoStreamPlaybackTheora);
		pb->set_audio_track(audio_track);
		pb->set_file(file);
		return pb;
	}

	void set_file(const String &p_file) { file = p_file; }
	void set_audio_track(int p_track) { audio_track = p_track; }

	VideoStreamTheora() { audio_track = 0; }
};

class ResourceFormatLoaderVideoStreamTheora : public ResourceFormatLoader {
public:
	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
	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