FreeCalypso > hg > gsm-codec-lib
annotate libgsmefr/vad.h @ 46:edd2e20e7090
gsmrec-dump: decode EFR frames
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 25 Nov 2022 03:06:03 +0000 |
parents | 36e1363ad885 |
children | af4b075d0313 |
rev | line source |
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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 /* Struct for storing pseudo floating point exponent and mantissa */ |
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12 struct _fp |
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13 { |
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14 Word16 e; /* exponent */ |
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15 Word16 m; /* mantissa */ |
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16 }; |
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17 |
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18 typedef struct _fp Pfloat; |
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19 |
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20 void vad_reset (void); |
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21 |
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22 Word16 vad_computation ( |
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23 Word16 r_h[], |
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24 Word16 r_l[], |
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25 Word16 scal_acf, |
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26 Word16 rc[], |
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27 Word16 ptch |
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28 ); |
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29 |
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30 void energy_computation ( |
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31 Word16 r_h[], |
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32 Word16 scal_acf, |
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33 Word16 rvad[], |
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34 Word16 scal_rvad, |
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35 Pfloat * acf0, |
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36 Pfloat * pvad |
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37 ); |
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38 |
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39 void acf_averaging ( |
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40 Word16 r_h[], |
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41 Word16 r_l[], |
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42 Word16 scal_acf, |
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43 Word32 L_av0[], |
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44 Word32 L_av1[] |
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45 ); |
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46 |
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47 void predictor_values ( |
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48 Word32 L_av1[], |
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49 Word16 rav1[], |
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50 Word16 *scal_rav1 |
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51 ); |
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52 |
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53 void schur_recursion ( |
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54 Word32 L_av1[], |
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55 Word16 vpar[] |
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56 ); |
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57 |
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58 void step_up ( |
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59 Word16 np, |
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60 Word16 vpar[], |
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61 Word16 aav1[] |
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62 ); |
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63 |
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64 void compute_rav1 ( |
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65 Word16 aav1[], |
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66 Word16 rav1[], |
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67 Word16 *scal_rav1 |
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68 ); |
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69 |
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70 Word16 spectral_comparison ( |
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71 Word16 rav1[], |
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72 Word16 scal_rav1, |
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73 Word32 L_av0[] |
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74 ); |
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75 |
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76 void threshold_adaptation ( |
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77 Word16 stat, |
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78 Word16 ptch, |
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79 Word16 tone, |
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80 Word16 rav1[], |
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81 Word16 scal_rav1, |
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82 Pfloat pvad, |
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83 Pfloat acf0, |
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84 Word16 rvad[], |
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85 Word16 *scal_rvad, |
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86 Pfloat * thvad |
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87 ); |
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88 |
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89 void tone_detection ( |
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90 Word16 rc[], |
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91 Word16 *tone |
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92 ); |
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93 |
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94 Word16 vad_decision ( |
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95 Pfloat pvad, |
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96 Pfloat thvad |
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97 ); |
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98 |
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99 Word16 vad_hangover ( |
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100 Word16 vvad |
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101 ); |
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102 |
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103 void periodicity_update ( |
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104 Word16 lags[], |
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105 Word16 *ptch |
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106 ); |