extern SR_PRIV struct sr_output_format output_text_ascii;
extern SR_PRIV struct sr_output_format output_binary;
extern SR_PRIV struct sr_output_format output_vcd;
extern SR_PRIV struct sr_output_format output_text_ascii;
extern SR_PRIV struct sr_output_format output_binary;
extern SR_PRIV struct sr_output_format output_vcd;