#ifndef PLAYER_H
#define PLAYER_H

#include <gst/gst.h>
#include <glib.h>
#include <string.h>
#include <stdarg.h>

/**
 * a node represents the head of a group of linked GstElements
 */
typedef GstElement* node_t;

/**
 * this contains the main variables of a player
 */
typedef struct player_t{
	GMainLoop *loop;
	GstElement *pipeline;
	node_t video_node;
	node_t audio_node;
	gboolean paused;
	gboolean subtitles;
} Player;

/**
 * creates a gst element, links it to the Player p,
 * prints error and exits on error
 */
GstElement * make_element(Player * p, const char * elem_name, const char * name);

/**
 * does the same thing than gst_element_link_many,
 * but the last linked element is returned
 */
node_t v_gst_element_link_many(GstElement * elem, va_list args);

/**
 * creates a node from a file source,
 * links all added elements to the Player p
 */
node_t file_node(Player * p, const char * filename, ...);

/**
 * creates a node from a demuxer source
 */
node_t demux_node(node_t demuxer, GstElement * elem, ...);

/**
 * creates a node from 2 muxed nodes as source
 */
node_t mux_node(node_t node1, node_t node2, GstElement * elem, ...);

/**
 * links 2 elements contained in the player
 */
void link_element(Player * p, const char * src, const char * dst);

/**
 * unlinks 2 elements contained in the player
 */
void unlink_element(Player * p, const char * src, const char * dst);

/**
 * returns the expected name of the subtitles file of a video file
 * remember to free the returned String
 */
char * get_sub_name(char * video_filename);

/**
 * Player constructor
 */
Player * player_init();

/**
 * clean the allocated resources
 */
void player_clean(Player * p);

#endif