+ /** Sound pressure level is A-weighted in the frequency domain,
+ * according to IEC 61672:2003. */
+ SR_MQFLAG_SPL_FREQ_WEIGHT_A = 0x200,
+ /** Sound pressure level is C-weighted in the frequency domain,
+ * according to IEC 61672:2003. */
+ SR_MQFLAG_SPL_FREQ_WEIGHT_C = 0x400,
+ /** Sound pressure level is Z-weighted (i.e. not at all) in the
+ * frequency domain, according to IEC 61672:2003. */
+ SR_MQFLAG_SPL_FREQ_WEIGHT_Z = 0x800,
+ /** Sound pressure level is not weighted in the frequency domain,
+ * albeit without standards-defined low and high frequency limits. */
+ SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT = 0x1000,
+ /** Sound pressure level measurement is S-weighted (1s) in the
+ * time domain. */
+ SR_MQFLAG_SPL_TIME_WEIGHT_S = 0x2000,
+ /** Sound pressure level measurement is F-weighted (125ms) in the
+ * time domain. */
+ SR_MQFLAG_SPL_TIME_WEIGHT_F = 0x4000,
+ /** Sound pressure level is time-averaged (LAT), also known as
+ * Equivalent Continuous A-weighted Sound Level (LEQ). */
+ SR_MQFLAG_SPL_LAT = 0x8000,
+ /** Sound pressure level represented as a percentage of measurements
+ * that were over a preset alarm level. */
+ SR_MQFLAG_SPL_PCT_OVER_ALARM = 0x10000,
+ /** Time is duration (as opposed to epoch, ...). */
+ SR_MQFLAG_DURATION = 0x20000,
+ /** Device is in "avg" mode, averaging upon each new value. */
+ SR_MQFLAG_AVG = 0x40000,
+};
+
+enum sr_trigger_matches {
+ SR_TRIGGER_ZERO = 1,
+ SR_TRIGGER_ONE,
+ SR_TRIGGER_RISING,
+ SR_TRIGGER_FALLING,
+ SR_TRIGGER_EDGE,
+ SR_TRIGGER_OVER,
+ SR_TRIGGER_UNDER,
+};
+
+/** The representation of a trigger, consisting of one or more stages
+ * containing one or more matches on a channel.
+ */
+struct sr_trigger {
+ /** A name for this trigger. This may be NULL if none is needed. */
+ char *name;
+ /** List of pointers to struct sr_trigger_stage. */
+ GSList *stages;
+};
+
+/** A trigger stage. */
+struct sr_trigger_stage {
+ /** Starts at 0. */
+ int stage;
+ /** List of pointers to struct sr_trigger_match. */
+ GSList *matches;
+};
+
+/** A channel to match and what to match it on. */
+struct sr_trigger_match {
+ /** The channel to trigger on. */
+ struct sr_channel *channel;
+ /** The trigger match to use.
+ * For logic channels, only the following matches may be used:
+ * SR_TRIGGER_ZERO
+ * SR_TRIGGER_ONE
+ * SR_TRIGGER_RISING
+ * SR_TRIGGER_FALLING
+ * SR_TRIGGER_EDGE
+ *
+ * For analog channels, only these matches may be used:
+ * SR_TRIGGER_RISING
+ * SR_TRIGGER_FALLING
+ * SR_TRIGGER_OVER
+ * SR_TRIGGER_UNDER
+ *
+ */
+ int match;
+ /** If the trigger match is one of SR_TRIGGER_OVER or SR_TRIGGER_UNDER,
+ * this contains the value to compare against. */
+ float value;