kopia lustrzana https://github.com/kamocat/uSDX
21 wiersze
420 B
C
21 wiersze
420 B
C
/*
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* hilbert.c
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*
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* Created on: Jul 9, 2020
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* Author: marshal
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*/
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#include <stdint.h>
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int16_t hilbert19(int16_t * src){
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const size_t M = 19/2;
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const int32_t coef[M/2+1];
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int32_t sum;
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sum = (src[M-1]-src[M+1]) * coef[0];
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sum += (src[M-3]-src[M+3]) * coef[1];
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sum += (src[M-5]-src[M+5]) * coef[2];
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sum += (src[M-7]-src[M+7]) * coef[3];
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sum += (src[M-9]-src[M+9]) * coef[4];
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return sum>>16;
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}
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