49 lines
1 KiB
C++
49 lines
1 KiB
C++
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#pragma once
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template <class T>
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class QuickLfsrCorrector {
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public:
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QuickLfsrCorrector() {
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T initVal = -1;
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T deltaVal = initVal / 11;
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for (int i=0; i<15; i++) {
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lfsr[i] = initVal;
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initVal -= deltaVal;
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}
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inPointer = 0;
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tab3 = initVal;
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initVal -= deltaVal;
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tab5 = initVal;
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initVal -= deltaVal;
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tab7 = initVal;
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}
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T Correct(T inVal) {
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inVal ^= tab3 ^ tab5 ^ tab7;
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inPointer--;
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if (inPointer<0)
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inPointer = 14;
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lfsr[inPointer] = inVal;
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int tabPointer = inPointer + 3;
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tabPointer %= 15;
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tab3 ^= lfsr[tabPointer];
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tabPointer += 5;
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tabPointer %= 15;
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tab5 ^= lfsr[tabPointer];
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tabPointer += 7;
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tabPointer %= 15;
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tab7 ^= lfsr[tabPointer];
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return inVal;
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}
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private:
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T lfsr[15];
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T tab3;
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T tab5;
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T tab7;
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int inPointer;
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};
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