1 files changed, 31 insertions, 0 deletions
diff --git a/src/components/heartrate/Ppg.h b/src/components/heartrate/Ppg.h
new file mode 100644
index 0000000..7000c87
--- /dev/null
+++ b/src/components/heartrate/Ppg.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <array>
+#include <cstddef>
+#include <cstdint>
+#include "components/heartrate/Biquad.h"
+#include "components/heartrate/Ptagc.h"
+
+namespace Pinetime {
+  namespace Controllers {
+    class Ppg {
+    public:
+      Ppg();
+      int8_t Preprocess(float spl);
+      float HeartRate();
+
+      void SetOffset(uint16_t i);
+      void Reset();
+
+    private:
+      std::array<int8_t, 200> data;
+      size_t dataIndex = 0;
+      float offset;
+      Biquad hpf;
+      Ptagc agc;
+      Biquad lpf;
+
+      float ProcessHeartRate();
+    };
+  }
+}