FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/dtx_dec.h @ 408:8847c1740e78
libtwamr: integrate VAD1
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 07 May 2024 00:56:10 +0000 |
parents | 5a1d18542f8a |
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rev | line source |
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1 /* |
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2 ***************************************************************************** |
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3 * |
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 |
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5 * R99 Version 3.3.0 |
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6 * REL-4 Version 4.1.0 |
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7 * |
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8 ***************************************************************************** |
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9 * |
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10 * File : dtx_dec.h |
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11 * Purpose : Decode comfort noice when in DTX |
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12 * |
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13 ***************************************************************************** |
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14 */ |
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15 #ifndef dtx_dec_h |
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16 #define dtx_dec_h "$Id $" |
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17 |
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18 /* |
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19 ***************************************************************************** |
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20 * INCLUDE FILES |
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21 ***************************************************************************** |
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22 */ |
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23 #include "tw_amr.h" |
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24 #include "typedef.h" |
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25 #include "dtx_common.h" |
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26 #include "d_plsf.h" |
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27 #include "gc_pred.h" |
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28 #include "c_g_aver.h" |
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29 |
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30 /* |
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31 ***************************************************************************** |
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32 * LOCAL VARIABLES AND TABLES |
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33 ***************************************************************************** |
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34 */ |
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35 enum DTXStateType {SPEECH = 0, DTX, DTX_MUTE}; |
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36 |
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37 #define DTX_MAX_EMPTY_THRESH 50 |
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38 |
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39 /* |
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40 ***************************************************************************** |
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41 * DEFINITION OF DATA TYPES |
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42 ***************************************************************************** |
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43 */ |
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44 |
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45 typedef struct { |
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46 Word16 since_last_sid; |
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47 Word16 true_sid_period_inv; |
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48 Word16 log_en; |
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49 Word16 old_log_en; |
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50 Word32 L_pn_seed_rx; |
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51 Word16 lsp[M]; |
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52 Word16 lsp_old[M]; |
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53 |
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54 Word16 lsf_hist[M*DTX_HIST_SIZE]; |
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55 Word16 lsf_hist_ptr; |
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56 Word16 lsf_hist_mean[M*DTX_HIST_SIZE]; |
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57 Word16 log_pg_mean; |
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58 Word16 log_en_hist[DTX_HIST_SIZE]; |
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59 Word16 log_en_hist_ptr; |
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60 |
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61 Word16 log_en_adjust; |
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62 |
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63 Word16 dtxHangoverCount; |
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64 Word16 decAnaElapsedCount; |
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65 |
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66 Word16 sid_frame; |
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67 Word16 valid_data; |
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68 Word16 dtxHangoverAdded; |
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69 |
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70 enum DTXStateType dtxGlobalState; /* contains previous state */ |
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71 /* updated in main decoder */ |
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72 |
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73 Word16 data_updated; /* marker to know if CNI data is ever renewed */ |
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74 |
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75 } dtx_decState; |
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76 |
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77 /* |
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78 ***************************************************************************** |
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79 * DECLARATION OF PROTOTYPES |
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80 ***************************************************************************** |
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81 */ |
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82 |
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83 /* |
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84 ************************************************************************** |
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85 * |
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86 * Function : dtx_dec_reset |
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87 * Purpose : Resets state memory |
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88 * Returns : 0 on success |
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89 * |
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90 ************************************************************************** |
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91 */ |
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92 void dtx_dec_reset (dtx_decState *st); |
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93 |
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94 /* |
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95 ************************************************************************** |
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96 * |
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97 * Function : dtx_dec |
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98 * Purpose : |
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99 * Description : |
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100 * |
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101 ************************************************************************** |
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102 */ |
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103 int dtx_dec( |
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104 dtx_decState *st, /* i/o : State struct */ |
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105 Word16 mem_syn[], /* i/o : AMR decoder state */ |
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106 D_plsfState* lsfState, /* i/o : decoder lsf states */ |
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107 gc_predState* predState, /* i/o : prediction states */ |
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108 Cb_gain_averageState* averState, /* i/o : CB gain average states */ |
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109 enum DTXStateType new_state, /* i : new DTX state */ |
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110 enum Mode mode, /* i : AMR mode */ |
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111 Word16 parm[], /* i : Vector of synthesis parameters */ |
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112 Word16 synth[], /* o : synthesised speech */ |
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113 Word16 A_t[] /* o : decoded LP filter in 4 subframes*/ |
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114 ); |
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115 |
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116 void dtx_dec_activity_update(dtx_decState *st, |
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117 Word16 lsf[], |
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118 Word16 frame[]); |
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119 |
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120 /* |
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121 ************************************************************************** |
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122 * |
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123 * Function : rx_dtx_handler |
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124 * Purpose : reads the frame type and checks history |
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125 * Description : to decide what kind of DTX/CNI action to perform |
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126 |
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127 ************************************************************************** |
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128 */ |
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129 enum DTXStateType rx_dtx_handler(dtx_decState *st, /* i/o : State struct */ |
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130 enum RXFrameType frame_type /* i : Frame type */ |
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131 ); |
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132 |
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133 #endif |