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annotate libgsmefr/codec.h @ 39:36e1363ad885

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libgsmefr: initial import of ETSI header files
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 24 Nov 2022 07:38:23 +0000
parents
children 988fd7ff514f
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39
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1 void Init_Coder_12k2 (void);
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2
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3 void Coder_12k2 (
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4 Word16 ana[], /* output : Analysis parameters */
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5 Word16 synth[] /* output : Local synthesis */
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6 );
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7
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8 void Init_Decoder_12k2 (void);
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9
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10 void Decoder_12k2 (
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11 Word16 parm[], /* input : vector of synthesis parameters
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12 parm[0] = bad frame indicator (bfi) */
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13 Word16 synth[], /* output: synthesis speech */
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14 Word16 A_t[], /* output: decoded LP filter in 4 subframes */
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15 Word16 TAF,
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16 Word16 SID_flag
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17 );
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18
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19 void Init_Post_Filter (void);
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20
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21 void Post_Filter (
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22 Word16 *syn, /* in/out: synthesis speech (postfiltered is output) */
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23 Word16 *Az_4 /* input : interpolated LPC parameters in all subfr. */
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24 );
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25
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26 void code_10i40_35bits (
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27 Word16 x[], /* (i) : target vector */
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28 Word16 cn[], /* (i) : residual after long term prediction */
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29 Word16 h[], /* (i) : impulse response of weighted synthesis
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30 filter */
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31 Word16 cod[], /* (o) : algebraic (fixed) codebook excitation */
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32 Word16 y[], /* (o) : filtered fixed codebook excitation */
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33 Word16 indx[] /* (o) : index of 10 pulses (sign + position) */
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34 );
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35 void dec_10i40_35bits (
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36 Word16 index[], /* (i) : index of 10 pulses (sign+position) */
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37 Word16 cod[] /* (o) : algebraic (fixed) codebook excitation */
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38 );
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39 Word16 Dec_lag6 ( /* output: return integer pitch lag */
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40 Word16 index, /* input : received pitch index */
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41 Word16 pit_min, /* input : minimum pitch lag */
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42 Word16 pit_max, /* input : maximum pitch lag */
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43 Word16 i_subfr, /* input : subframe flag */
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44 Word16 L_frame_by2,/* input : speech frame size divided by 2 */
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45 Word16 *T0_frac, /* output: fractional part of pitch lag */
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46 Word16 bfi /* input : bad frame indicator */
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47 );
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48 Word16 d_gain_pitch ( /* out : quantized pitch gain */
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49 Word16 index, /* in : index of quantization */
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50 Word16 bfi, /* in : bad frame indicator (good = 0) */
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51 Word16 state, /* in : state of the state machine */
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52 Word16 prev_bf, /* Previous bf */
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53 Word16 rxdtx_ctrl
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54
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55 );
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56 void d_gain_code (
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57 Word16 index, /* input : received quantization index */
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58 Word16 code[], /* input : innovation codevector */
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59 Word16 lcode, /* input : codevector length */
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60 Word16 *gain_code, /* output: decoded innovation gain */
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61 Word16 bfi, /* input : bad frame indicator */
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62 Word16 state, /* in : state of the state machine */
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63 Word16 prev_bf, /* Previous bf */
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64 Word16 rxdtx_ctrl,
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65 Word16 i_subfr,
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66 Word16 rx_dtx_state
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67
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68 );
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69 void D_plsf_5 (
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70 Word16 *indice, /* input : quantization indices of 5 submatrices */
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71 Word16 *lsp1_q, /* output: quantized 1st LSP vector */
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72 Word16 *lsp2_q, /* output: quantized 2nd LSP vector */
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73 Word16 bfi, /* input : bad frame indicator (set to 1 if a bad
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74 frame is received) */
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75 Word16 rxdtx_ctrl,
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76 Word16 rx_dtx_state
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77 );
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78 Word16 Enc_lag6 ( /* output: Return index of encoding */
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79 Word16 T0, /* input : Pitch delay */
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80 Word16 *T0_frac, /* in/out: Fractional pitch delay */
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81 Word16 *T0_min, /* in/out: Minimum search delay */
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82 Word16 *T0_max, /* in/out: Maximum search delay */
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83 Word16 pit_min, /* input : Minimum pitch delay */
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84 Word16 pit_max, /* input : Maximum pitch delay */
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85 Word16 pit_flag /* input : Flag for 1st or 3rd subframe */
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86 );
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87
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88 Word16 q_gain_pitch ( /* Return index of quantization */
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89 Word16 *gain /* (i) : Pitch gain to quantize */
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90 );
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91
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92 Word16 q_gain_code ( /* Return quantization index */
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93 Word16 code[], /* (i) : fixed codebook excitation */
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94 Word16 lcode, /* (i) : codevector size */
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95 Word16 *gain, /* (i/o) : quantized fixed codebook gain */
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96 Word16 txdtx_ctrl,
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97 Word16 i_subfr
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98 );
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99
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100 Word16 G_pitch ( /* (o) : Gain of pitch lag saturated to 1.2 */
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101 Word16 xn[], /* (i) : Pitch target. */
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102 Word16 y1[], /* (i) : Filtered adaptive codebook. */
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103 Word16 L_subfr /* : Length of subframe. */
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104 );
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105 Word16 G_code ( /* out : Gain of innovation code. */
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106 Word16 xn[], /* in : target vector */
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107 Word16 y2[] /* in : filtered inovation vector */
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108 );
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109
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110 Word16 Interpol_6 ( /* (o) : interpolated value */
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111 Word16 *x, /* (i) : input vector */
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112 Word16 frac /* (i) : fraction */
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113 );
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114 void Int_lpc (
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115 Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */
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116 Word16 lsp_mid[], /* input: LSP vector at the 2nd subfr. of
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117 present frame */
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118 Word16 lsp_new[], /* input: LSP vector at the 4th subfr. of
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119 present frame */
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120 Word16 Az[] /* output: interpolated LP parameters in all subfr. */
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121 );
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122 void Int_lpc2 (
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123 Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */
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124 Word16 lsp_mid[], /* input: LSP vector at the 2nd subframe of
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125 present frame */
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126 Word16 lsp_new[], /* input: LSP vector at the 4th subframe of
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127 present frame */
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128 Word16 Az[] /* output:interpolated LP parameters
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129 in subframes 1 and 3 */
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130 );
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131 Word16 Pitch_fr6 ( /* (o) : pitch period. */
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132 Word16 exc[], /* (i) : excitation buffer */
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133 Word16 xn[], /* (i) : target vector */
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134 Word16 h[], /* (i) : impulse response of synthesis and
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135 weighting filters */
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136 Word16 L_subfr, /* (i) : Length of subframe */
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137 Word16 t0_min, /* (i) : minimum value in the searched range. */
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138 Word16 t0_max, /* (i) : maximum value in the searched range. */
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139 Word16 i_subfr, /* (i) : indicator for first subframe. */
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140 Word16 *pit_frac /* (o) : chosen fraction. */
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141 );
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142 Word16 Pitch_ol ( /* output: open loop pitch lag */
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143 Word16 signal[], /* input: signal used to compute the open loop pitch */
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144 /* signal[-pit_max] to signal[-1] should be known */
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145 Word16 pit_min, /* input : minimum pitch lag */
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146 Word16 pit_max, /* input : maximum pitch lag */
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147 Word16 L_frame /* input : length of frame to compute pitch */
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148 );
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149 void Pred_lt_6 (
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150 Word16 exc[], /* in/out: excitation buffer */
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151 Word16 T0, /* input : integer pitch lag */
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152 Word16 frac, /* input : fraction of lag */
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153 Word16 L_subfr /* input : subframe size */
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154 );
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155 void Q_plsf_5 (
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156 Word16 *lsp1, /* input : 1st LSP vector */
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157 Word16 *lsp2, /* input : 2nd LSP vector */
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158 Word16 *lsp1_q, /* output: quantized 1st LSP vector */
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159 Word16 *lsp2_q, /* output: quantized 2nd LSP vector */
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160 Word16 *indice, /* output: quantization indices of 5 matrices */
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161 Word16 txdtx_ctrl /* input : tx dtx control word */
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162 );