74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
#ifndef TRACEDIFFERENCEGENERATOR_H
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#define TRACEDIFFERENCEGENERATOR_H
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#include <vector>
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#include <functional>
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#include <QDebug>
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template<typename T, int minUnchanged>
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class TraceDifferenceGenerator {
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public:
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TraceDifferenceGenerator(std::function<void(const T&)> changeCallback) :
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last{},
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callback(changeCallback),
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nextCallbackIndex(0)
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{}
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void reset() {
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last.clear();
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nextCallbackIndex = 0;
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}
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void newTrace(const std::vector<T> &trace) {
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if(trace.size() > last.size()) {
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// definitely got more points than last time. Find first point that is hasn't been transmitted and generate callbacks for it and all subsequent points
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unsigned int i=nextCallbackIndex;
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while(i < trace.size()) {
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callback(trace[i]);
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i++;
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}
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nextCallbackIndex = 0;
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} else if(trace.size() < last.size()) {
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// got less points than last time. This must be a completely new trace, generate callbacks for all points
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for(auto &i : trace) {
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callback(i);
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}
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nextCallbackIndex = 0;
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} else {
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// still the same amount of points.
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unsigned int i = nextCallbackIndex;
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unsigned int changedPoints = 0;
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do {
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if(i > 0) {
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i--;
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} else {
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i = trace.size() - 1;
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}
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bool unchanged = last[i] == trace[i];
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if(!unchanged) {
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changedPoints = (i + trace.size() - nextCallbackIndex + 1);
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if(changedPoints > trace.size()) {
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changedPoints -= trace.size();
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}
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break;
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}
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} while (i != nextCallbackIndex);
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i = nextCallbackIndex;
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while(changedPoints--) {
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callback(trace[i]);
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i = (i + 1) % trace.size();
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}
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nextCallbackIndex = i;
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}
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last = trace;
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}
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private:
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unsigned int nextCallbackIndex;
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std::vector<T> last;
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std::function<void(const T&)> callback;
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};
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#endif // TRACEDIFFERENCEGENERATOR_H
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