tied_mgau_common.h

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/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
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#ifndef __TIED_MGAU_COMMON_H__
#define __TIED_MGAU_COMMON_H__

#include <sphinxbase/logmath.h>
#include <sphinxbase/fixpoint.h>

#define MGAU_MIXW_VERSION       "1.0"   /* Sphinx-3 file format version for mixw */
#define MGAU_PARAM_VERSION      "1.0"   /* Sphinx-3 file format version for mean/var */
#define NONE            -1
#define WORST_DIST      (int32)(0x80000000)

#ifdef FIXED_POINT
#define GMMSUB(a,b) \
        (((a)-(b) > a) ? (INT_MIN) : ((a)-(b)))

#define GMMADD(a,b) \
        (((a)+(b) < a) ? (INT_MAX) : ((a)+(b)))
#else
#define GMMSUB(a,b) ((a)-(b))
#define GMMADD(a,b) ((a)+(b))
#endif

#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif


#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
#define LOGMATH_INLINE static inline
#elif defined(_MSC_VER)
#define LOGMATH_INLINE __inline
#else
#define LOGMATH_INLINE static
#endif

/* Allocate 0..159 for negated quantized mixture weights and 0..96 for
 * negated normalized acoustic scores, so that the combination of the
 * two (for a single mixture) can never exceed 255. */
#define MAX_NEG_MIXW 159 
#define MAX_NEG_ASCR 96  
LOGMATH_INLINE int
fast_logmath_add(logmath_t *lmath, int mlx, int mly)
{
    logadd_t *t = LOGMATH_TABLE(lmath);
    int d, r;

    /* d must be positive, obviously. */
    if (mlx > mly) {
        d = (mlx - mly);
        r = mly;
    }
    else {
        d = (mly - mlx);
        r = mlx;
    }

    return r - (((uint8 *)t->table)[d]);
}

#endif /* __TIED_MGAU_COMMON_H__ */