feat: StepDetector update FPS, more FPS fixes

pasada-lib/include/ssf_filter.h

@@ -33,8 +33,8 @@ public:
  */
 class SsfStepDetector {
 protected:
-    const size_t LEN_INIT;
-    const size_t LEN_TH_WIN;
+    size_t LEN_INIT;
+    size_t LEN_TH_WIN;
     size_t num_samples;
     double ssf_threshold;
     double ssf_threshold_nm1;
@@ -50,6 +50,7 @@ public:
      * @param len_refr duration of refractory period, in samples
      */
     SsfStepDetector(double fps);
+    ~SsfStepDetector();
     double filter(double val);
     double peek_threshold();
 
@@ -62,18 +63,19 @@ public:
 class RunningQuality {
 protected:
     // TODO: make it a filter (output proper samples)
+    // TODO: use fps info
 
     /** template beat is resampled to this #samples */
-    const int BEAT_LEN = 120 /* 2*FPS for 30 bpm lower end */;
+    int BEAT_LEN;
 
     /** threshold for accepting initial beats */
-    const double BEAT_CORR_THR_1 = 0.9;
+    double BEAT_CORR_THR_1 = 0.9;
     /** threshold for accepting subsequent beats */
-    const double BEAT_CORR_THR_2 = 0.8;
+    double BEAT_CORR_THR_2 = 0.8;
     /** absolute SSF threshold for accepting any beat */
-    const double SSF_THRESHOLD = 5.0;
+    double SSF_THRESHOLD = 5.0;
     /** number of recent beats to use for beat template. must be even (alternating feet have different patterns; make it symmetric) */
-    const int    NUM_BEATS = 4;
+    int    NUM_BEATS = 4;
 
     std::deque<std::vector<double> > beatTemplates;
     std::vector<double> beatTemplate;
@@ -93,8 +95,8 @@ protected:
     virtual void dispatchBeat(int idx, bool good, double posCorr);
 
 public:
-    RunningQuality();
-    explicit RunningQuality(bool disableSsf);
+    RunningQuality(double fps);
+    explicit RunningQuality(double fps, bool disableSsf);
     virtual ~RunningQuality();
 
     // note: arg should be an iterator really, but can do later
@@ -116,6 +118,7 @@ protected:
     double sqi;
 public:
     RunningQualityFilter(double fps);
+    ~RunningQualityFilter();
     double filter(double y, double ssf, double step);
 };
 

pasada-lib/include/step_detector.h

@@ -51,6 +51,7 @@ protected:
     Resampler res_x;
     Resampler res_y;
     Resampler res_z;
+    double fps;
 
 public:
     StepDetector(double fps, StepListener *listener, bool debug = false);

pasada-lib/ssf_filter.cpp

@@ -86,6 +86,7 @@ SsfStepDetector::SsfStepDetector(double fps) :
 {
     assert (LEN_INIT >= LEN_TH_WIN && "LEN_INIT < LEN_TH_WIN, check normalization of initial ssf_threshold");
 }
+SsfStepDetector::~SsfStepDetector() {}
 double SsfStepDetector::filter(double ssf) {
     double ssf_mean = f_ssf_mean.filter(ssf) / ((double) LEN_TH_WIN);
     double rv = 0.0;
@@ -154,8 +155,13 @@ void RunningQuality::replaceTemplate(std::vector<double>& x) {
 void RunningQuality::dispatchLocked() { /* implement me, add Listener etc. */ }
 void RunningQuality::dispatchBeat(int idx, bool good, double posCorr) { /* implement me, add Listener etc. */ }
 
-RunningQuality::RunningQuality(): beatCorrThr2(BEAT_CORR_THR_2), justLocked(false), idx(0), disableSsf(false) {}
-RunningQuality::RunningQuality(bool disableSsf): beatCorrThr2(BEAT_CORR_THR_2), justLocked(false), idx(0), disableSsf(disableSsf) {}
+static int get_beat_len(double fps) {
+    /* 2*FPS for 30 bpm lower end */
+    return 2.0 * fps;
+}
+
+RunningQuality::RunningQuality(double fps): BEAT_LEN(get_beat_len(fps)), beatCorrThr2(BEAT_CORR_THR_2), justLocked(false), idx(0), disableSsf(false) {}
+RunningQuality::RunningQuality(double fps, bool disableSsf): BEAT_LEN(get_beat_len(fps)), beatCorrThr2(BEAT_CORR_THR_2), justLocked(false), idx(0), disableSsf(disableSsf) {}
 RunningQuality::~RunningQuality() {}
 
 // note: arg should be an iterator really, but can do later
@@ -221,7 +227,8 @@ bool RunningQuality::append(std::vector<double> &rawBeat, std::vector<double> &r
 }
 
 
-RunningQualityFilter::RunningQualityFilter(double fps) : sqi(0.0) {}
+RunningQualityFilter::RunningQualityFilter(double fps) : f_sqi(fps), sqi(0.0) {}
+RunningQualityFilter::~RunningQualityFilter() {}
 
 double RunningQualityFilter::filter(double y, double ssf, double step) {
     if (step == 1.0) {

pasada-lib/step_detector.cpp

@@ -12,7 +12,8 @@ StepDetector::StepDetector(double fps, StepListener *listener, bool debug) :
     f_ssf(fps),
     f_ssd(fps),
     f_sqi(fps),
-    debug(debug)
+    debug(debug),
+    fps(0.0)
 {}
 
 static int gravity_num_taps(double fps) {
@@ -50,6 +51,14 @@ void StepDetector::filter(double ts, std::vector<float> values) {
     res_x.push(ts, values[0]);
     res_y.push(ts, values[1]);
     res_z.push(ts, values[2]);
+    // as soon as there is 'fps' information, re-init the classes requiring fps info
+    if (fps == 0.0 && res_x.peek()) {
+        fps = res_x.get_fs();
+        f_grav = GravityFilter(fps);
+        f_ssf = SsfFilter(fps);
+        f_ssd = SsfStepDetector(fps);
+        f_sqi = RunningQualityFilter(fps);
+    }
     while (res_x.peek()) {
         double x = res_x.get(), y = res_y.get(), z = res_z.get();
         std::vector<double> samp { x, y, z };
@@ -85,7 +94,7 @@ double StepDetector::primeFilters(double fps, std::vector<double> sig) {
     double ts = 0;
     for (size_t i = 0; i < N_INIT; i++) {
         const auto a_i = static_cast<float>(sig[i]);
-        filter(ts, std::vector<float> {0.0f, a_i, 0.0f});
+        filter(ts * 1e9, std::vector<float> {0.0f, a_i, 0.0f});
         ts += 1.0 / fps;
     }
     // clear debug buffers