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/* A private header file used by nabtslib.c; this is not part of the
public interface. */
#ifndef NABTSLIB_H
#define NABTSLIB_H
/* How many bytes are in a bundle before FEC is added? */#define BUNDLE_SMALL (26*14)
/* How many bytes are in a bundle after FEC is added? */#define BUNDLE_LARGE (28*16)
extern void nabtslib_exit();
typedef enum {FEC_OK, FEC_CORRECTABLE, FEC_UNCORRECTABLE, MISSING} fec_stat;
#ifdef linux
int NabtsFecReceiveData(int nField, int nTimeMsec, int scan_line, unsigned char *pbData, int nDataLen);#endif
extern unsigned char hamming_encode[16];
typedef enum {fec_status_ok, fec_status_onebyte, fec_status_multibyte, fec_status_2byte, fec_status_missing} fec_status;
typedef struct { fec_status status; /* status of the current FEC info */ int err; /* the current checksum error */ short errl[2]; /* the galois_log[] of the two bytes of
the checksum error */ int byte[2]; /* the locations of the error bytes
(byte[1] is only valid if status == fec_status_2byte) */ int byte_val[2]; /* the values to XOR into the above bytes
to make the checksum error 0 */ int score; /* the number of bits changed by this
correction */ int really_onebyte; /* We can compute the optimal
correction (the one which will change the least number of bits). However, we don't do this if we don't have to (it's slow). If status is fec_status_2byte, we have done so; if status is fec_status_multibyte, we have not. If status is fec_status_onebyte, we need to look at really_onebyte to see if the current correction is optimal. */} fec_info;
typedef struct { int not_full; unsigned char vals[28];} Packet;
typedef struct _stream_struct { int stream_addr; Packet pack[32]; fec_info horz[32]; int last_index; struct _stream_struct *next; int count; int dead_time; int confAvgSum; int confAvgCount;} Stream;
extern int decode_hamming(unsigned char Val);extern int remove_parity(unsigned char *pVal);extern int find_err_val(int err_byte, int byte_csum_err, int check_ind);extern int compute_csum_horiz(unsigned char *vals, int len);extern int compute_csum_vert(unsigned char *vals, int len);extern fec_stat check_checksum_horiz(unsigned char *vals, int len, fec_info *inf);extern int process_line(unsigned char *);extern void init_inv2_coeffs();extern void erase_packet(Stream *str, int i);extern void complete_bundle(Stream *str, NFECCallback cb, void *ctx, NFECState *st);
extern void init_nzbits_arr();extern unsigned char nzbits_arr[256];
typedef struct { int missing; unsigned char vals[28];} VBI_Packet;
#define MAX_RECENT_ADDRS 16
/* typedef'd to NFECState in nabtsapi.h */struct nfec_state_str { int *pGroupAddrs; int nGroupAddrs; Stream *streams; /* The following is just some scratch space for
complete_bundle()... it's too big to put on the stack, if I make it a global then my code isn't reentrant, and I don't want to bother with allocating and freeing it each time complete_bundle() is called (besides, this is probably more efficient) */ fec_info vert[28]; struct { int addr; int count; } recent_addrs[MAX_RECENT_ADDRS]; int n_recent_addrs; int field_count;};
#define PROFILE_VALIDATE
#ifdef PROFILE_VALIDATE
extern int g_nValidate;#endif
#endif /* NABTSLIB_H */
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