29 lines
859 B
C++
29 lines
859 B
C++
#pragma once
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#include "constants.h"
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namespace ft8 {
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class BPDecoderState {
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public:
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void reset();
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int iterate(const float codeword[], uint8_t plain[]);
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private:
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float tov[ft8::N][3];
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float toc[ft8::M][7];
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};
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// codeword is 174 log-likelihoods.
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// plain is a return value, 174 ints, to be 0 or 1.
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// iters is how hard to try.
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// n_errors == 0 means success.
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void ldpc_decode(const float codeword[], int max_iters, uint8_t plain[], int *n_errors);
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void bp_decode(const float codeword[], int max_iters, uint8_t plain[], int *n_errors);
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// Packs a string of bits each represented as a zero/non-zero byte in plain[],
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// as a string of packed bits starting from the MSB of the first byte of packed[]
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void pack_bits(const uint8_t plain[], int num_bits, uint8_t packed[]);
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}
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