#ifndef HADAMARD_H
#define	HADAMARD_H

// FEC
#define MAX_FEC_INPUT_SIZE      8U
#define MAX_FEC_OUTPUT_SIZE     128U // (2^(MAX_FEC_INPUT_SIZE-1)) non fa
#define MAX_FEC_PER_BLOCK       4U

#define ARPHY_FEC_TYPE_NONE       0
#define ARPHY_FEC_TYPE_HADAMARD   1
#define ARPHY_FEC_TYPE_MAX        1

#define ARPHY_FEC_INPUT_SIZE_NIBBLE 0
#define ARPHY_FEC_INPUT_SIZE_BYTE   1


typedef struct {
    uint8_t type; ///< algoritmo di FEC
    uint8_t in_bit_size; ///< net data size in bits
    uint8_t out_bit_size; ///< code size in bits
    uint8_t out_symbols_size; ///< code size in symbols
    uint8_t hamming_distance; ///< 
    uint8_t sqrsum; // fattore qualita
} block_code;

extern block_code fec;

// buffer per FEC
extern int16_t tx_FHT_Buffer[MAX_FEC_OUTPUT_SIZE], rx_FHT_Buffer[MAX_FEC_OUTPUT_SIZE];

void arphy_set_up_FEC(block_code* fec_params);
void arphy_FEC_encode(uint8_t Chunk, uint8_t ChunkSize, int16_t *DataBuffer);
uint8_t arphy_FEC_decode(int16_t *DataMatrix);
void FastHadamardTransform(int16_t *Data, uint8_t fec_size);
void InverseFastHadamardTransform(int16_t *Data, uint8_t fec_size);

#endif	/* HADAMARD_H */