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#ifndef __S2_FSG_H__
#define __S2_FSG_H__

#include <search.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Structures through which an application may load an FSG into the decoder.
 * There's essentially a 1-to-1 correspondence between the FSG file format
 * and these structures.
 */
typedef struct s2_fsg_trans_s {
    int32 from_state;
    int32 to_state;
    float32 prob;                 /* Probability associated with transition */
    char *word;                   /* NULL for null transitions */
    struct s2_fsg_trans_s *next;  /* For linking together all transitions in FSG */
} s2_fsg_trans_t;

typedef struct s2_fsg_s {
    char *name;                   /* This would be the name on the FSG_BEGIN line
                                     in an FSG file.  Can be NULL or "" for unnamed
                                     FSGs */
    int32 n_state;                /* Set of states = 0 .. n_state-1 */
    int32 start_state;            /* 0 <= start_state < n_state */
    int32 final_state;            /* 0 <= final_state < n_state */
    s2_fsg_trans_t *trans_list;   /* Null-terminated list of transitions in FSG,
                                     in no particular order */
} s2_fsg_t;


#if 0
/* ARCHAN: It was in fbs.h of Sphinx2 . Oh man, we have o
 */
typedef struct search_hyp_s {

    char const *word;   /* READ-ONLY */
    int32 wid;          /* For internal use of decoder */
    int32 sf, ef;       /* Start, end frames within utterance for this word */
    int32 ascr, lscr;   /* Acoustic, LM scores (not always used!) */
    int32 fsg_state;    /* At which this entry terminates (FSG mode only) */

    struct search_hyp_s *next;  /* Next word segment in the hypothesis; NULL if none */

} search_hyp_t;
#endif


#if 0 /* Only in Sphinx 2 */
float conf;         /* Confidence measure (roughly prob(correct)) for this word;
		       NOT FILLED IN BY THE RECOGNIZER at the moment!! */
int32 latden;       /* Average lattice density in segment.  Larger values imply
		       more confusion and less certainty about the result.  To use
		       it for rejection, cutoffs must be found independently */
double phone_perp;  /* Average phone perplexity in segment.  Larger values imply
		       more confusion and less certainty.  To use it for rejection,
		       cutoffs must be found independently. */
#endif


#ifdef __cplusplus
}
#endif
#endif