text: 
  /*
   * This file is part of the micropython-ulab project,
   *
   * https://github.com/v923z/micropython-ulab
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2020 Jeff Epler for Adafruit Industries
   *               2020 Zoltán Vörös
  */
  
  #ifndef _FILTER_
  #define _FILTER_
  
  #include "../ulab.h"
  #include "../ndarray.h"
  
  #if ULAB_FILTER_MODULE
  
  extern mp_obj_module_t ulab_filter_module;
  
  MP_DECLARE_CONST_FUN_OBJ_KW(filter_convolve_obj);
  MP_DECLARE_CONST_FUN_OBJ_KW(filter_sosfilt_obj);
  
  #endif
  #endif
  