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comparison src/vad.h @ 0:56410792419a

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src: original EFR source from ETSI
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 03 Apr 2024 05:31:37 +0000
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-1:000000000000 0:56410792419a
1 /***************************************************************************
2 *
3 * File Name: vad.h
4 *
5 * Purpose: Contains the prototypes for all functions of voice activity
6 * detection. Also contains the type definition for the pseudo
7 * floating point data type.
8 *
9 **************************************************************************/
10
11 /* Struct for storing pseudo floating point exponent and mantissa */
12 struct _fp
13 {
14 Word16 e; /* exponent */
15 Word16 m; /* mantissa */
16 };
17
18 typedef struct _fp Pfloat;
19
20 void vad_reset (void);
21
22 Word16 vad_computation (
23 Word16 r_h[],
24 Word16 r_l[],
25 Word16 scal_acf,
26 Word16 rc[],
27 Word16 ptch
28 );
29
30 void energy_computation (
31 Word16 r_h[],
32 Word16 scal_acf,
33 Word16 rvad[],
34 Word16 scal_rvad,
35 Pfloat * acf0,
36 Pfloat * pvad
37 );
38
39 void acf_averaging (
40 Word16 r_h[],
41 Word16 r_l[],
42 Word16 scal_acf,
43 Word32 L_av0[],
44 Word32 L_av1[]
45 );
46
47 void predictor_values (
48 Word32 L_av1[],
49 Word16 rav1[],
50 Word16 *scal_rav1
51 );
52
53 void schur_recursion (
54 Word32 L_av1[],
55 Word16 vpar[]
56 );
57
58 void step_up (
59 Word16 np,
60 Word16 vpar[],
61 Word16 aav1[]
62 );
63
64 void compute_rav1 (
65 Word16 aav1[],
66 Word16 rav1[],
67 Word16 *scal_rav1
68 );
69
70 Word16 spectral_comparison (
71 Word16 rav1[],
72 Word16 scal_rav1,
73 Word32 L_av0[]
74 );
75
76 void threshold_adaptation (
77 Word16 stat,
78 Word16 ptch,
79 Word16 tone,
80 Word16 rav1[],
81 Word16 scal_rav1,
82 Pfloat pvad,
83 Pfloat acf0,
84 Word16 rvad[],
85 Word16 *scal_rvad,
86 Pfloat * thvad
87 );
88
89 void tone_detection (
90 Word16 rc[],
91 Word16 *tone
92 );
93
94 Word16 vad_decision (
95 Pfloat pvad,
96 Pfloat thvad
97 );
98
99 Word16 vad_hangover (
100 Word16 vvad
101 );
102
103 void periodicity_update (
104 Word16 lags[],
105 Word16 *ptch
106 );