#define OUTPUT_GIF  1#define OUTPUT_PBM  2#define OUTPUT_PS   3#define OUTPUT_RAW  4#define OUTPUT_PS_BITS 5extern void pdf417_init_arrays ();extern void pd417_set_raw_line (int linenum, char *instr);extern void pdf417_set_raw_count (int countin);extern void pdf417_set_input_filename (char *instr);extern void pdf417_set_output_filename (char *instr);extern void pdf417_en (int in_rval, int in_cval, int in_ec_level,                       int output_type, int use_default, int raw_in_mode);extern void pdf417_en_dim (int in_rval, int in_cval, int in_ec_level,                       int output_type, int use_default, int raw_in_mode,                       int X, int Y, int QZ );extern void pdf417_en_new (int in_rval, int in_cval, int in_ec_level,                       int output_type, int use_default, int raw_in_mode,                       int X, int Y, int QZ );extern void pdf417_prep_to_raw(const char* buffer, int buffer_len);