#define SR_HZ_TO_NS(n) (1000000000 / (n))
+/* libsigrok loglevels. */
+#define SR_LOG_NONE 0
+#define SR_LOG_ERR 1
+#define SR_LOG_WARN 2
+#define SR_LOG_INFO 3
+#define SR_LOG_DBG 4
+
typedef int (*sr_receive_data_callback) (int fd, int revents, void *user_data);
/* Data types used by hardware plugins for set_configuration() */