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annotate libgsmefr/vad.h @ 48:af4b075d0313

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libgsmefr: encoder state structure finished in first pass
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 25 Nov 2022 05:16:38 +0000
parents 36e1363ad885
children 988fd7ff514f
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36e1363ad885 libgsmefr: initial import of ETSI header files
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1 /***************************************************************************
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2 *
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3 * File Name: vad.h
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4 *
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5 * Purpose: Contains the prototypes for all functions of voice activity
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6 * detection. Also contains the type definition for the pseudo
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7 * floating point data type.
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8 *
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9 **************************************************************************/
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10
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11 void vad_reset (void);
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12
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13 Word16 vad_computation (
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14 Word16 r_h[],
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15 Word16 r_l[],
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16 Word16 scal_acf,
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17 Word16 rc[],
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18 Word16 ptch
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19 );
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20
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21 void energy_computation (
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22 Word16 r_h[],
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23 Word16 scal_acf,
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24 Word16 rvad[],
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25 Word16 scal_rvad,
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26 Pfloat * acf0,
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27 Pfloat * pvad
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28 );
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29
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30 void acf_averaging (
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31 Word16 r_h[],
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32 Word16 r_l[],
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33 Word16 scal_acf,
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34 Word32 L_av0[],
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35 Word32 L_av1[]
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36 );
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37
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38 void predictor_values (
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39 Word32 L_av1[],
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40 Word16 rav1[],
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41 Word16 *scal_rav1
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42 );
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43
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44 void schur_recursion (
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45 Word32 L_av1[],
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46 Word16 vpar[]
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47 );
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48
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49 void step_up (
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50 Word16 np,
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51 Word16 vpar[],
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52 Word16 aav1[]
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53 );
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54
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55 void compute_rav1 (
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56 Word16 aav1[],
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57 Word16 rav1[],
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58 Word16 *scal_rav1
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59 );
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60
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61 Word16 spectral_comparison (
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62 Word16 rav1[],
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63 Word16 scal_rav1,
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64 Word32 L_av0[]
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65 );
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66
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67 void threshold_adaptation (
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68 Word16 stat,
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69 Word16 ptch,
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70 Word16 tone,
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71 Word16 rav1[],
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72 Word16 scal_rav1,
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73 Pfloat pvad,
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74 Pfloat acf0,
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75 Word16 rvad[],
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76 Word16 *scal_rvad,
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77 Pfloat * thvad
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78 );
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79
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80 void tone_detection (
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81 Word16 rc[],
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82 Word16 *tone
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83 );
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84
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85 Word16 vad_decision (
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86 Pfloat pvad,
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87 Pfloat thvad
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88 );
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89
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90 Word16 vad_hangover (
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91 Word16 vvad
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92 );
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93
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94 void periodicity_update (
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95 Word16 lags[],
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96 Word16 *ptch
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97 );