Créer bibliothèque de musique en C

#include <SDL/SDL.h>
#include <SDL/SDL_ttf.h>
#include <gtk/gtk.h>
#include <stdlib.h>
#include <stdio.h>
#include "struct.h"

void Load_Directory(TTF_Font *font, SDL_Surface *Screen, tab_file *tab_fn)
{
  GDir *dir = g_dir_open ("Data/Music", 0, NULL);
  SDL_Color color = {0, 255, 0};
  int i;

  if (dir)
    {
      const gchar *filename = NULL;
      i = 0;
      while (filename = g_dir_read_name (dir))
        {
          tab_fn->tab[i].rect.x = 220;
          tab_fn->tab[i].rect.y = 502 + (21 * i);
          tab_fn->tab[i].str = filename;
          tab_fn->tab[i].sur = TTF_RenderText_Solid(font, filename, color);
          i = i + 1;
          tab_fn->nb = i;
        }
      g_dir_close (dir), dir = NULL;
   }
}