Improve memory footprint in filter classes

code/espurna/filters/BaseFilter.h

@@ -11,29 +11,27 @@ class BaseFilter {
     public:
 
         BaseFilter() {
-            _data = new std::vector<double>();
         }
 
         ~BaseFilter() {
-            if (_data) delete _data;
         }
 
         virtual void add(double value) {
-            _data->push_back(value);
+            _data.push_back(value);
         }
 
         virtual unsigned char count() {
-            return _data->size();
+            return _data.size();
         }
 
         virtual void reset() {
-            _data->clear();
+            _data.clear();
         }
 
         virtual double max() {
             double max = 0;
-            for (unsigned char i = 1; i < _data->size(); i++) {
-                if (max < _data->at(i)) max = _data->at(i);
+            for (unsigned char i = 1; i < _data.size(); i++) {
+                if (max < _data.at(i)) max = _data.at(i);
             }
             return max;
         }
@@ -44,6 +42,6 @@ class BaseFilter {
 
     protected:
 
-        std::vector<double> *_data;
+        std::vector<double> _data;
 
 };

code/espurna/filters/MedianFilter.h

@@ -11,8 +11,8 @@ class MedianFilter : public BaseFilter {
     public:
 
         virtual void reset() {
-            double last = _data->empty() ? 0 : _data->back();
-            _data->clear();
+            double last = _data.empty() ? 0 : _data.back();
+            _data.clear();
             add(last);
         }
 
@@ -20,13 +20,13 @@ class MedianFilter : public BaseFilter {
 
             double sum = 0;
 
-            if (_data->size() > 2) {
+            if (_data.size() > 2) {
 
-                for (unsigned char i = 1; i <= _data->size() - 2; i++) {
+                for (unsigned char i = 1; i <= _data.size() - 2; i++) {
 
-                    double previous = _data->at(i-1);
-                    double current = _data->at(i);
-                    double next = _data->at(i+1);
+                    double previous = _data.at(i-1);
+                    double current = _data.at(i);
+                    double next = _data.at(i+1);
 
                     if (previous > current) std::swap(previous, current);
                     if (current > next) std::swap(current, next);
@@ -36,11 +36,11 @@ class MedianFilter : public BaseFilter {
 
                 }
 
-                sum /= (_data->size() - 2);
+                sum /= (_data.size() - 2);
 
-            } else if (_data->size() > 0) {
+            } else if (_data.size() > 0) {
 
-                sum = _data->front();
+                sum = _data.front();
 
             }
 

code/espurna/filters/MovingAverageFilter.h

@@ -14,13 +14,13 @@ class MovingAverageFilter : public BaseFilter {
         MovingAverageFilter(unsigned char size) {
             _size = size;
             for (unsigned char i=0; i<size; i++) {
-                _data->push_back(0);
+                _data.push_back(0);
             }
         }
 
         virtual void add(double value) {
-            _sum = _sum + value - _data->at(_pointer);
-            _data->at(_pointer) = value;
+            _sum = _sum + value - _data.at(_pointer);
+            _data.at(_pointer) = value;
             _pointer = (_pointer + 1) % _size;
         }