feat: detect steps and play audio

app/src/main/cpp/StepDetector.h

@@ -0,0 +1,26 @@
+//
+// Created by david on 03.03.2026.
+//
+
+#ifndef LOCKSTEP_STEPDETECTOR_H
+#define LOCKSTEP_STEPDETECTOR_H
+
+#include "StepListener.h"
+#include "iir_filter.h"
+#include "ssf_filter.h"
+#include <vector>
+
+class StepDetector {
+protected:
+    StepListener *listener;
+    IirFilter f_highpass;
+    Filt f_neg;
+    SsfFilter f_ssf;
+    SsfStepDetector f_ssd;
+
+public:
+    StepDetector(StepListener *listener);
+    void filter(std::vector<float> values);
+};
+
+#endif //LOCKSTEP_STEPDETECTOR_H