Filter: added reset with value to LowPassFilter2p

libraries/Filter/LowPassFilter2p.cpp

@@ -31,6 +31,11 @@ void DigitalBiquadFilter<T>::reset() {
     _delay_element_1 = _delay_element_2 = T();
 }
 
+template <class T>
+void DigitalBiquadFilter<T>::reset(const T &value) {
+    _delay_element_1 = _delay_element_2 = value;
+}
+
 template <class T>
 void DigitalBiquadFilter<T>::compute_params(float sample_freq, float cutoff_freq, biquad_params &ret) {
     ret.cutoff_freq = cutoff_freq;
@@ -99,6 +104,11 @@ void LowPassFilter2p<T>::reset(void) {
     return _filter.reset();
 }
 
+template <class T>
+void LowPassFilter2p<T>::reset(const T &value) {
+    return _filter.reset(value);
+}
+
 /* 
  * Make an instances
  * Otherwise we have to move the constructor implementations to the header file :P

libraries/Filter/LowPassFilter2p.h

@@ -39,6 +39,7 @@ public:
 
     T apply(const T &sample, const struct biquad_params &params);
     void reset();
+    void reset(const T &value);
     static void compute_params(float sample_freq, float cutoff_freq, biquad_params &ret);
     
 private:
@@ -59,6 +60,7 @@ public:
     float get_sample_freq(void) const;
     T apply(const T &sample);
     void reset(void);
+    void reset(const T &value);
 
 protected:
     struct DigitalBiquadFilter<T>::biquad_params _params;