FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/ec_gains.h @ 362:9cbd1b5d061f
libtwamr: integrate ec_gains.c
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 06 May 2024 02:08:43 +0000 |
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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 : ec_gains.h |
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11 * Purpose: : Error concealment for pitch and codebook gains |
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12 * |
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13 ******************************************************************************** |
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14 */ |
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15 #ifndef ec_gains_h |
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16 #define ec_gains_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 "typedef.h" |
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24 #include "gc_pred.h" |
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25 |
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26 /* |
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27 ******************************************************************************** |
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28 * LOCAL VARIABLES AND TABLES |
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29 ******************************************************************************** |
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30 */ |
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31 |
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32 /* |
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33 ******************************************************************************** |
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34 * DEFINITION OF DATA TYPES |
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35 ******************************************************************************** |
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36 */ |
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37 typedef struct { |
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38 Word16 pbuf[5]; |
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39 Word16 past_gain_pit; |
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40 Word16 prev_gp; |
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41 } ec_gain_pitchState; |
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42 |
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43 typedef struct { |
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44 Word16 gbuf[5]; |
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45 Word16 past_gain_code; |
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46 Word16 prev_gc; |
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47 } ec_gain_codeState; |
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48 /* |
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49 ******************************************************************************** |
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50 * DECLARATION OF PROTOTYPES |
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51 ******************************************************************************** |
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52 */ |
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53 |
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54 /* |
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55 ************************************************************************** |
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56 * |
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57 * Function : ec_gain_code_reset |
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58 * Purpose : Resets state memory |
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59 * |
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60 ************************************************************************** |
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61 */ |
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62 void ec_gain_code_reset ( |
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63 ec_gain_codeState *state |
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64 ); |
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65 |
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66 /* |
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67 ************************************************************************** |
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68 * |
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69 * Function : ec_gain_code |
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70 * Purpose : conceal the codebook gain |
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71 * Call this function only in BFI (instead of normal gain |
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72 * decoding function) |
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73 * |
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74 ************************************************************************** |
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75 */ |
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76 void ec_gain_code ( |
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77 ec_gain_codeState *st, /* i/o : State struct */ |
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78 gc_predState *pred_state, /* i/o : MA predictor state */ |
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79 Word16 state, /* i : state of the state machine */ |
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80 Word16 *gain_code /* o : decoded innovation gain */ |
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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 : ec_gain_code_update |
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87 * Purpose : update the codebook gain concealment state; |
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88 * limit gain_code if the previous frame was bad |
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89 * Call this function always after decoding (or concealing) |
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90 * the gain |
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91 * |
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92 ************************************************************************** |
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93 */ |
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94 void ec_gain_code_update ( |
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95 ec_gain_codeState *st, /* i/o : State struct */ |
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96 Word16 bfi, /* i : flag: frame is bad */ |
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97 Word16 prev_bf, /* i : flag: previous frame was bad */ |
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98 Word16 *gain_code /* i/o : decoded innovation gain */ |
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99 ); |
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100 |
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101 /* |
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102 ************************************************************************** |
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103 * |
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104 * Function: ec_gain_pitch_reset |
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105 * Purpose: Resets state memory |
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106 * |
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107 ************************************************************************** |
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108 */ |
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109 void ec_gain_pitch_reset ( |
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110 ec_gain_pitchState *state |
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111 ); |
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112 |
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113 /* |
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114 ************************************************************************** |
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115 * |
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116 * Function : ec_gain_pitch |
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117 * Purpose : conceal the pitch gain |
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118 * Call this function only in BFI (instead of normal gain |
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119 * decoding function) |
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120 * |
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121 ************************************************************************** |
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122 */ |
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123 void ec_gain_pitch ( |
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124 ec_gain_pitchState *st, /* i/o : state variables */ |
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125 Word16 state, /* i : state of the state machine */ |
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126 Word16 *gain_pitch /* o : pitch gain (Q14) */ |
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127 ); |
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128 |
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129 /* |
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130 ************************************************************************** |
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131 * |
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132 * Function : ec_gain_pitch_update |
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133 * Purpose : update the pitch gain concealment state; |
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134 * limit gain_pitch if the previous frame was bad |
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135 * Call this function always after decoding (or concealing) |
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136 * the gain |
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137 * |
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138 ************************************************************************** |
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139 */ |
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140 void ec_gain_pitch_update ( |
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141 ec_gain_pitchState *st, /* i/o : state variables */ |
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142 Word16 bfi, /* i : flag: frame is bad */ |
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143 Word16 prev_bf, /* i : flag: previous frame was bad */ |
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144 Word16 *gain_pitch /* i/o : pitch gain */ |
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145 ); |
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146 |
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147 #endif |