Add ::reset() to TriggerGenerator

include/dsp/digital.hpp

@@ -6,7 +6,7 @@
 namespace rack {
 
 
-/** Turns high when value reaches 1, turns low when value reaches 0 */
+/** Turns HIGH when value reaches 1.f, turns LOW when value reaches 0.f. */
 struct SchmittTrigger {
 	// UNKNOWN is used to represent a stable state when the previous state is not yet set
 	enum State {
@@ -14,7 +14,14 @@ struct SchmittTrigger {
 		LOW,
 		HIGH
 	};
-	State state = UNKNOWN;
+	State state;
+
+	SchmittTrigger() {
+		reset();
+	}
+	void reset() {
+		state = UNKNOWN;
+	}
 	/** Updates the state of the Schmitt Trigger given a value.
 	Returns true if triggered, i.e. the value increases from 0 to 1.
 	If different trigger thresholds are needed, use
@@ -48,28 +55,39 @@ struct SchmittTrigger {
 	bool isHigh() {
 		return state == HIGH;
 	}
-	void reset() {
-		state = UNKNOWN;
-	}
 };
 
 
 /** When triggered, holds a high value for a specified time before going low again */
-struct PulseGenerator {
-	float time = 0.f;
-	float pulseTime = 0.f;
+struct TriggerGenerator {
+	float time;
+	float triggerDuration;
+
+	TriggerGenerator() {
+		reset();
+	}
+	/** Immediately resets the state to LOW */
+	void reset() {
+		time = 0.f;
+		triggerDuration = 0.f;
+	}
+	/** Advances the state by `deltaTime`. Returns whether the pulse is in the HIGH state. */
 	bool process(float deltaTime) {
 		time += deltaTime;
-		return time < pulseTime;
+		return time < triggerDuration;
 	}
-	void trigger(float pulseTime) {
-		// Keep the previous pulseTime if the existing pulse would be held longer than the currently requested one.
-		if (time + pulseTime >= this->pulseTime) {
+	/** Begins a trigger with the given `triggerDuration`. */
+	void trigger(float triggerDuration) {
+		// Keep the previous triggerDuration if the existing pulse would be held longer than the currently requested one.
+		if (time + triggerDuration >= this->triggerDuration) {
 			time = 0.f;
-			this->pulseTime = pulseTime;
+			this->triggerDuration = triggerDuration;
 		}
 	}
 };
 
+/** Deprecated name for TriggerGenerator */
+typedef TriggerGenerator PulseGenerator;
+
 
 } // namespace rack