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tied_mgau_common.h
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37 
43 #ifndef __TIED_MGAU_COMMON_H__
44 #define __TIED_MGAU_COMMON_H__
45 
46 #include <sphinxbase/logmath.h>
47 #include <sphinxbase/fixpoint.h>
48 
49 #define MGAU_MIXW_VERSION "1.0" /* Sphinx-3 file format version for mixw */
50 #define MGAU_PARAM_VERSION "1.0" /* Sphinx-3 file format version for mean/var */
51 #define NONE -1
52 #define WORST_DIST (int32)(0x80000000)
53 
55 #ifdef FIXED_POINT
56 #define GMMSUB(a,b) \
57  (((a)-(b) > a) ? (INT_MIN) : ((a)-(b)))
58 
59 #define GMMADD(a,b) \
60  (((a)+(b) < a) ? (INT_MAX) : ((a)+(b)))
61 #else
62 #define GMMSUB(a,b) ((a)-(b))
63 #define GMMADD(a,b) ((a)+(b))
64 #endif
65 
66 #ifndef MIN
67 #define MIN(a,b) ((a) < (b) ? (a) : (b))
68 #endif
69 
70 
71 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
72 #define LOGMATH_INLINE static inline
73 #elif defined(_MSC_VER)
74 #define LOGMATH_INLINE __inline
75 #else
76 #define LOGMATH_INLINE static
77 #endif
78 
79 /* Allocate 0..159 for negated quantized mixture weights and 0..96 for
80  * negated normalized acoustic scores, so that the combination of the
81  * two (for a single mixture) can never exceed 255. */
82 #define MAX_NEG_MIXW 159
83 #define MAX_NEG_ASCR 96
102 LOGMATH_INLINE int
103 fast_logmath_add(logmath_t *lmath, int mlx, int mly)
104 {
105  logadd_t *t = LOGMATH_TABLE(lmath);
106  int d, r;
107 
108  /* d must be positive, obviously. */
109  if (mlx > mly) {
110  d = (mlx - mly);
111  r = mly;
112  }
113  else {
114  d = (mly - mlx);
115  r = mlx;
116  }
117 
118  return r - (((uint8 *)t->table)[d]);
119 }
120 
121 #endif /* __TIED_MGAU_COMMON_H__ */
LOGMATH_INLINE int fast_logmath_add(logmath_t *lmath, int mlx, int mly)
Quickly log-add two negated log probabilities.