Move feedback stutter bug report to android folder

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-07-30 19:14:00 -05:00
parent d5dfb290c1
commit 6f66a5db64
566 changed files with 432 additions and 147 deletions
@@ -0,0 +1,96 @@
+#ifndef _WDL_TIME_SERIES_H_
+#define _WDL_TIME_SERIES_H_
+
+#include "heapbuf.h"
+
+class WDL_TimeSeries
+{
+  WDL_TimeSeries(int size)
+  {
+    m_size=wdl_max(size,1);
+    m_ema_wt=0.0;
+    Reset();
+  }
+  void Reset()
+  {
+    m_series.Resize(0, false);
+    m_pos=0;
+    m_ema=0.0;
+    m_ema_init=false;
+  }
+
+  int GetSize() const { return m_series.GetSize(); }
+
+  void AddData(double v)
+  {
+    if (m_series.GetSize() < m_size) m_series.Add(v);
+    else m_series.Get()[m_pos]=v;
+    m_pos = (m_pos+1)%m_size;
+    if (m_ema_wt > 0.0)
+    {
+      if (!m_ema_init)
+      {
+        m_ema=v;
+        m_ema_init=true;
+      }
+      else
+      {
+        m_ema=m_ema*(1.0-m_ema_wt)+v*m_ema_wt;
+      }
+    }
+  }
+
+  double Last() const
+  {
+    const int sz=m_series.GetSize();
+    if (!sz) return 0.0;
+    const double *p=m_series.Get();
+    return (m_pos ? p[m_pos-1] : p[sz-1]);
+  }
+  double Mean() const
+  {
+    const int sz=m_series.GetSize();
+    if (!sz) return 0.0;
+    double mean=0.0;
+    const double *p=m_series.Get();
+    for (int i=0; i < sz; ++i) mean += p[i];
+    return mean/(double)sz;
+  }
+
+  double StdDev() const
+  {
+    const int sz=m_series.GetSize();
+    if (!sz) return 0.0;
+    const double mean=Mean();
+    double mean2=0.0;
+    const double *p=m_series.Get();
+    for (int i=0; i < sz; ++i) mean2 += (p[i]-mean)*(p[i]-mean);
+    return sqrt(mean2/(double)sz);
+  }
+
+  double ZScore(double v) const
+  {
+    const int sz=m_series.GetSize();
+    if (!sz) return 0.0;
+    double stdev=StdDev();
+    if (stdev == 0.0) return 0.0;
+    double last=Last();
+    return fabs(v-last)/stdev;
+  }
+
+  void InitExpMovAvg(int hl)
+  {
+    if (hl < 1) hl=1;
+    m_ema_wt=exp(-1.0/(double)hl);
+  }
+  double ExpMovAvg() const { return m_ema; }
+
+  int m_size;
+  int m_pos;
+  double m_ema, m_ema_wt;
+  bool m_ema_init;
+  WDL_TypedBuf<double> m_series;
+};
+
+
+#endif