-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "appa-55ii: "
-#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
-#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
-#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
-#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
-#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
-#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
+#define LOG_PREFIX "appa-55ii"
+
+#define APPA_55II_NUM_CHANNELS 2
+#define APPA_55II_BUF_SIZE (4 + 32 + 1)
+#define DEFAULT_DATA_SOURCE DATA_SOURCE_LIVE
+
+enum {
+ DATA_SOURCE_LIVE,
+ DATA_SOURCE_MEMORY,
+};