void sample_thread_proc(struct sr_dev_inst *sdi,
uint64_t record_length, uint64_t sample_rate);
void data_feed_in(const struct sr_dev_inst *sdi,
void sample_thread_proc(struct sr_dev_inst *sdi,
uint64_t record_length, uint64_t sample_rate);
void data_feed_in(const struct sr_dev_inst *sdi,