FreeCalypso > hg > gsm-codec-lib
annotate libgsmefr/cod_12k2.c @ 62:c87ccddf3fd1
libgsmefr: d_homing.c compiles
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 26 Nov 2022 00:53:14 +0000 |
parents | d285877fc4cc |
children | d9ad0f5121e8 |
rev | line source |
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1 /*************************************************************************** |
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2 * |
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3 * FILE NAME: cod_12k2.c |
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4 * |
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5 * FUNCTIONS DEFINED IN THIS FILE: |
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6 * Coder_12k2 and Init_Coder_12k2 |
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7 * |
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8 * |
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9 * Init_Coder_12k2(void): |
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10 * Initialization of variables for the coder section. |
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11 * |
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12 * Coder_12k2(Word16 ana[], Word16 synth[]): |
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13 * Speech encoder routine operating on a frame basis. |
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14 * |
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15 |
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16 ***************************************************************************/ |
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17 |
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18 #include "gsm_efr.h" |
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19 #include "typedef.h" |
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20 #include "namespace.h" |
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21 #include "basic_op.h" |
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22 #include "sig_proc.h" |
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23 #include "memops.h" |
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24 #include "no_count.h" |
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25 #include "codec.h" |
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26 #include "cnst.h" |
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27 #include "enc_state.h" |
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28 |
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29 #include "window2.tab" |
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30 |
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31 #include "vad.h" |
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32 #include "dtx.h" |
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33 |
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34 /*-----------------------------------------------------------* |
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35 * Coder constant parameters (defined in "cnst.h") * |
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36 *-----------------------------------------------------------* |
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37 * L_WINDOW : LPC analysis window size * |
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38 * L_FRAME : Frame size * |
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39 * L_FRAME_BY2 : Half the frame size * |
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40 * L_SUBFR : Sub-frame size * |
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41 * M : LPC order * |
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42 * MP1 : LPC order+1 * |
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43 * L_TOTAL : Total size of speech buffer * |
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44 * PIT_MIN : Minimum pitch lag * |
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45 * PIT_MAX : Maximum pitch lag * |
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46 * L_INTERPOL : Length of filter for interpolation * |
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47 *-----------------------------------------------------------*/ |
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48 |
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49 /* Spectral expansion factors */ |
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50 |
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51 static const Word16 F_gamma1[M] = |
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52 { |
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53 29491, 26542, 23888, 21499, 19349, |
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54 17414, 15672, 14105, 12694, 11425 |
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55 }; |
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56 static const Word16 F_gamma2[M] = |
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57 { |
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58 19661, 11797, 7078, 4247, 2548, |
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59 1529, 917, 550, 330, 198 |
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60 }; |
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61 |
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62 /*************************************************************************** |
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63 * FUNCTION: Init_Coder_12k2 |
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64 * |
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65 * PURPOSE: Initialization of variables for the coder section. |
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66 * |
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67 * DESCRIPTION: |
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68 * - initilize pointers to speech buffer |
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69 * - initialize static pointers |
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70 * - set static vectors to zero |
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71 * |
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72 ***************************************************************************/ |
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73 |
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74 void Init_Coder_12k2 (struct EFR_encoder_state *st) |
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75 { |
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76 /* Static vectors to zero */ |
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77 |
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78 Set_zero (st->old_speech, L_TOTAL); |
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79 Set_zero (st->old_exc, PIT_MAX + L_INTERPOL); |
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80 Set_zero (st->old_wsp, PIT_MAX); |
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81 Set_zero (st->mem_syn, M); |
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82 Set_zero (st->mem_w, M); |
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83 Set_zero (st->mem_w0, M); |
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84 Set_zero (st->mem_err, M); |
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85 Set_zero (st->ai_zero + MP1, L_SUBFR); |
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86 Set_zero (st->hvec, L_SUBFR); /* set to zero "h1[-L_SUBFR..-1]" */ |
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87 |
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88 /* Initialize lsp_old [] */ |
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89 |
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90 st->lsp_old[0] = 30000; |
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91 st->lsp_old[1] = 26000; |
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92 st->lsp_old[2] = 21000; |
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93 st->lsp_old[3] = 15000; |
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94 st->lsp_old[4] = 8000; |
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95 st->lsp_old[5] = 0; |
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96 st->lsp_old[6] = -8000; |
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97 st->lsp_old[7] = -15000; |
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98 st->lsp_old[8] = -21000; |
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99 st->lsp_old[9] = -26000; |
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100 |
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101 /* Initialize lsp_old_q[] */ |
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102 |
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103 Copy (st->lsp_old, st->lsp_old_q, M); |
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104 |
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105 return; |
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106 } |
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107 |
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108 /*************************************************************************** |
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109 * FUNCTION: Coder_12k2 |
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110 * |
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111 * PURPOSE: Principle encoder routine. |
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112 * |
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113 * DESCRIPTION: This function is called every 20 ms speech frame, |
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114 * operating on the newly read 160 speech samples. It performs the |
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115 * principle encoding functions to produce the set of encoded parameters |
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116 * which include the LSP, adaptive codebook, and fixed codebook |
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117 * quantization indices (addresses and gains). |
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118 * |
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119 * INPUTS: |
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120 * No input arguments are passed to this function. However, before |
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121 * calling this function, 160 new speech data samples should be copied to |
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122 * the vector new_speech[]. This is a global pointer which is declared in |
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123 * this file (it points to the end of speech buffer minus 160). |
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124 * |
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125 * OUTPUTS: |
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126 * |
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127 * ana[]: vector of analysis parameters. |
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128 * synth[]: Local synthesis speech (for debugging purposes) |
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129 * |
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130 ***************************************************************************/ |
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131 |
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132 void Coder_12k2 ( |
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133 struct EFR_encoder_state *st, |
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134 Word16 ana[], /* output : Analysis parameters */ |
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135 Word16 synth[] /* output : Local synthesis */ |
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136 ) |
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137 { |
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138 /* handy pointers that were static vars in the original code */ |
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139 Word16 *speech = st->old_speech + L_TOTAL - L_FRAME; |
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140 Word16 *p_window = st->old_speech + L_TOTAL - L_WINDOW; |
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141 Word16 *wsp = st->old_wsp + PIT_MAX; |
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142 Word16 *exc = st->old_exc + PIT_MAX + L_INTERPOL; |
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143 Word16 *zero = st->ai_zero + MP1; |
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144 Word16 *h1 = st->hvec + L_SUBFR; |
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145 Word16 *error = st->mem_err + M; |
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146 |
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147 /* LPC coefficients */ |
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148 |
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149 Word16 r_l[MP1], r_h[MP1]; /* Autocorrelations lo and hi */ |
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150 Word16 A_t[(MP1) * 4]; /* A(z) unquantized for the 4 subframes */ |
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151 Word16 Aq_t[(MP1) * 4]; /* A(z) quantized for the 4 subframes */ |
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152 Word16 Ap1[MP1]; /* A(z) with spectral expansion */ |
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153 Word16 Ap2[MP1]; /* A(z) with spectral expansion */ |
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154 Word16 *A, *Aq; /* Pointer on A_t and Aq_t */ |
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155 Word16 lsp_new[M], lsp_new_q[M];/* LSPs at 4th subframe */ |
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156 Word16 lsp_mid[M], lsp_mid_q[M];/* LSPs at 2nd subframe */ |
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157 |
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158 /* Other vectors */ |
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159 |
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160 Word16 xn[L_SUBFR]; /* Target vector for pitch search */ |
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161 Word16 xn2[L_SUBFR]; /* Target vector for codebook search */ |
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162 Word16 res2[L_SUBFR]; /* Long term prediction residual */ |
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163 Word16 code[L_SUBFR]; /* Fixed codebook excitation */ |
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164 Word16 y1[L_SUBFR]; /* Filtered adaptive excitation */ |
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165 Word16 y2[L_SUBFR]; /* Filtered fixed codebook excitation */ |
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166 |
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167 /* Scalars */ |
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168 |
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169 Word16 i, j, k, i_subfr; |
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170 Word16 T_op, T0, T0_min, T0_max, T0_frac; |
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171 Word16 gain_pit, gain_code, pit_flag, pit_sharp; |
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172 Word16 temp; |
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173 Word32 L_temp; |
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174 |
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175 Word16 scal_acf, VAD_flag, lags[2], rc[4]; |
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176 |
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177 /*----------------------------------------------------------------------* |
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178 * - Perform LPC analysis: (twice per frame) * |
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179 * * autocorrelation + lag windowing * |
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180 * * Levinson-Durbin algorithm to find a[] * |
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181 * * convert a[] to lsp[] * |
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182 * * quantize and code the LSPs * |
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183 * * find the interpolated LSPs and convert to a[] for all * |
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184 * subframes (both quantized and unquantized) * |
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185 *----------------------------------------------------------------------*/ |
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186 |
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187 /* LP analysis centered at 2nd subframe */ |
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188 |
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189 scal_acf = Autocorr (p_window, M, r_h, r_l, window_160_80); |
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190 /* Autocorrelations */ |
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191 |
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192 Lag_window (M, r_h, r_l); /* Lag windowing */ |
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193 |
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194 Levinson (st, r_h, r_l, &A_t[MP1], rc); /* Levinson-Durbin */ |
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195 |
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196 Az_lsp (&A_t[MP1], lsp_mid, st->lsp_old); /* From A(z) to lsp */ |
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197 |
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198 /* LP analysis centered at 4th subframe */ |
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199 |
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200 /* Autocorrelations */ |
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201 scal_acf = Autocorr (p_window, M, r_h, r_l, window_232_8); |
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202 |
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203 Lag_window (M, r_h, r_l); /* Lag windowing */ |
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204 |
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205 Levinson (st, r_h, r_l, &A_t[MP1 * 3], rc); /* Levinson-Durbin */ |
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206 |
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207 Az_lsp (&A_t[MP1 * 3], lsp_new, lsp_mid); /* From A(z) to lsp */ |
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208 |
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209 if (st->dtx_mode) |
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210 { |
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211 /* DTX enabled, make voice activity decision */ |
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212 VAD_flag = vad_computation (st, r_h, r_l, scal_acf, rc, st->ptch); |
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213 tx_dtx (st, VAD_flag); /* TX DTX handler */ |
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214 } |
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215 else |
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216 { |
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217 /* DTX disabled, active speech in every frame */ |
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218 VAD_flag = 1; |
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219 st->txdtx_ctrl = TX_VAD_FLAG | TX_SP_FLAG; |
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220 } |
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221 |
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222 /* LSP quantization (lsp_mid[] and lsp_new[] jointly quantized) */ |
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223 |
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224 Q_plsf_5 (st, lsp_mid, lsp_new, lsp_mid_q, lsp_new_q, ana, st->txdtx_ctrl); |
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225 |
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226 ana += 5; |
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227 |
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228 /*--------------------------------------------------------------------* |
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229 * Find interpolated LPC parameters in all subframes (both quantized * |
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230 * and unquantized). * |
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231 * The interpolated parameters are in array A_t[] of size (M+1)*4 * |
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232 * and the quantized interpolated parameters are in array Aq_t[] * |
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233 *--------------------------------------------------------------------*/ |
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234 |
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235 Int_lpc2 (st->lsp_old, lsp_mid, lsp_new, A_t); |
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236 |
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237 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
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238 { |
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239 Int_lpc (st->lsp_old_q, lsp_mid_q, lsp_new_q, Aq_t); |
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240 |
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241 /* update the LSPs for the next frame */ |
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242 Copy (lsp_new, st->lsp_old, M); |
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243 Copy (lsp_new_q, st->lsp_old_q, M); |
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244 } |
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245 else |
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246 { |
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247 /* Use unquantized LPC parameters in case of no speech activity */ |
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248 for (i = 0; i < MP1; i++) |
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249 { |
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250 Aq_t[i] = A_t[i]; move16 (); |
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251 Aq_t[i + MP1] = A_t[i + MP1]; move16 (); |
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252 Aq_t[i + MP1 * 2] = A_t[i + MP1 * 2]; move16 (); |
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253 Aq_t[i + MP1 * 3] = A_t[i + MP1 * 3]; move16 (); |
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254 } |
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255 |
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256 /* update the LSPs for the next frame */ |
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257 Copy (lsp_new, st->lsp_old, M); |
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258 Copy (lsp_new_q, st->lsp_old_q, M); |
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259 } |
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260 |
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261 /*----------------------------------------------------------------------* |
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262 * - Find the weighted input speech wsp[] for the whole speech frame * |
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263 * - Find the open-loop pitch delay for first 2 subframes * |
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264 * - Set the range for searching closed-loop pitch in 1st subframe * |
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265 * - Find the open-loop pitch delay for last 2 subframes * |
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266 *----------------------------------------------------------------------*/ |
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267 |
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268 A = A_t; move16 (); |
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269 for (i = 0; i < L_FRAME; i += L_SUBFR) |
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270 { |
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271 Weight_Ai (A, F_gamma1, Ap1); |
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272 |
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273 Weight_Ai (A, F_gamma2, Ap2); |
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274 |
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275 Residu (Ap1, &speech[i], &wsp[i], L_SUBFR); |
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276 |
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277 Syn_filt (Ap2, &wsp[i], &wsp[i], L_SUBFR, st->mem_w, 1); |
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278 |
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279 A += MP1; move16 (); |
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280 } |
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281 |
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282 /* Find open loop pitch lag for first two subframes */ |
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283 |
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284 T_op = Pitch_ol (wsp, PIT_MIN, PIT_MAX, L_FRAME_BY2); move16 (); |
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285 |
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286 lags[0] = T_op; move16 (); |
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287 |
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288 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
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289 { |
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290 /* Range for closed loop pitch search in 1st subframe */ |
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291 |
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292 T0_min = sub (T_op, 3); |
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293 if (T0_min < PIT_MIN) |
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294 { |
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295 T0_min = PIT_MIN; move16 (); |
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296 } |
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297 T0_max = add (T0_min, 6); |
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298 if (T0_max > PIT_MAX) |
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299 { |
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300 T0_max = PIT_MAX; move16 (); |
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301 T0_min = sub (T0_max, 6); |
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302 } |
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303 } |
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304 /* Find open loop pitch lag for last two subframes */ |
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305 |
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306 T_op = Pitch_ol (&wsp[L_FRAME_BY2], PIT_MIN, PIT_MAX, L_FRAME_BY2); |
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307 |
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308 if (st->dtx_mode) |
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309 { |
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310 lags[1] = T_op; move16 (); |
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311 periodicity_update (st, lags); |
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312 } |
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313 /*----------------------------------------------------------------------* |
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314 * Loop for every subframe in the analysis frame * |
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315 *----------------------------------------------------------------------* |
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316 * To find the pitch and innovation parameters. The subframe size is * |
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317 * L_SUBFR and the loop is repeated L_FRAME/L_SUBFR times. * |
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318 * - find the weighted LPC coefficients * |
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319 * - find the LPC residual signal res[] * |
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320 * - compute the target signal for pitch search * |
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321 * - compute impulse response of weighted synthesis filter (h1[]) * |
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322 * - find the closed-loop pitch parameters * |
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323 * - encode the pitch delay * |
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324 * - update the impulse response h1[] by including pitch * |
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325 * - find target vector for codebook search * |
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326 * - codebook search * |
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327 * - encode codebook address * |
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328 * - VQ of pitch and codebook gains * |
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329 * - find synthesis speech * |
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330 * - update states of weighting filter * |
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331 *----------------------------------------------------------------------*/ |
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332 |
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333 /* pointer to interpolated LPC parameters */ |
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334 A = A_t; move16 (); |
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335 /* pointer to interpolated quantized LPC parameters */ |
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336 Aq = Aq_t; move16 (); |
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337 |
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338 for (i_subfr = 0; i_subfr < L_FRAME; i_subfr += L_SUBFR) |
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339 { |
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340 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
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341 { |
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342 |
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343 /*---------------------------------------------------------------* |
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344 * Find the weighted LPC coefficients for the weighting filter. * |
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345 *---------------------------------------------------------------*/ |
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346 |
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347 Weight_Ai (A, F_gamma1, Ap1); |
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348 |
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349 Weight_Ai (A, F_gamma2, Ap2); |
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350 |
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351 /*---------------------------------------------------------------* |
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352 * Compute impulse response, h1[], of weighted synthesis filter * |
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353 *---------------------------------------------------------------*/ |
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354 |
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355 Copy (Ap1, st->ai_zero, M+1); |
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356 |
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357 Syn_filt (Aq, st->ai_zero, h1, L_SUBFR, zero, 0); |
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358 |
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359 Syn_filt (Ap2, h1, h1, L_SUBFR, zero, 0); |
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360 |
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361 } |
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362 /*---------------------------------------------------------------* |
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363 * Find the target vector for pitch search: * |
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364 *---------------------------------------------------------------*/ |
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365 |
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366 Residu (Aq, &speech[i_subfr], res2, L_SUBFR); /* LPC residual */ |
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367 |
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368 if ((st->txdtx_ctrl & TX_SP_FLAG) == 0) |
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369 { |
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370 /* Compute comfort noise excitation gain based on |
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371 LP residual energy */ |
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372 |
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373 st->CN_excitation_gain = compute_CN_excitation_gain (res2); |
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374 } |
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375 else |
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376 { |
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377 Copy (res2, &exc[i_subfr], L_SUBFR); |
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378 |
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379 Syn_filt (Aq, &exc[i_subfr], error, L_SUBFR, st->mem_err, 0); |
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380 |
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381 Residu (Ap1, error, xn, L_SUBFR); |
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382 |
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383 /* target signal xn[] */ |
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384 Syn_filt (Ap2, xn, xn, L_SUBFR, st->mem_w0, 0); |
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385 |
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386 /*--------------------------------------------------------------* |
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387 * Closed-loop fractional pitch search * |
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388 *--------------------------------------------------------------*/ |
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389 |
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390 /* flag for first and 3th subframe */ |
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391 pit_flag = i_subfr; move16 (); |
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392 /* set t0_min and t0_max for 3th subf.*/ |
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393 if (i_subfr == L_FRAME_BY2) |
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394 { |
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395 T0_min = sub (T_op, 3); |
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396 |
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397 if (T0_min < PIT_MIN) |
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398 { |
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399 T0_min = PIT_MIN; move16 (); |
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400 } |
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401 T0_max = add (T0_min, 6); |
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402 if (T0_max > PIT_MAX) |
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403 { |
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404 T0_max = PIT_MAX; move16 (); |
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405 T0_min = sub (T0_max, 6); |
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406 } |
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407 pit_flag = 0; move16 (); |
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408 } |
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409 |
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410 T0 = Pitch_fr6 (&exc[i_subfr], xn, h1, L_SUBFR, T0_min, T0_max, |
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411 pit_flag, &T0_frac); move16 (); |
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412 |
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413 *ana = Enc_lag6 (T0, &T0_frac, &T0_min, &T0_max, PIT_MIN, |
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414 PIT_MAX, pit_flag); |
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415 } |
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416 ana++; |
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417 /* Incrementation of ana is done here to work also |
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418 when no speech activity is present */ |
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419 |
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420 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
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421 { |
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422 |
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423 /*---------------------------------------------------------------* |
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424 * - find unity gain pitch excitation (adaptive codebook entry) * |
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425 * with fractional interpolation. * |
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426 * - find filtered pitch exc. y1[]=exc[] convolved with h1[] * |
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427 * - compute pitch gain and limit between 0 and 1.2 * |
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428 * - update target vector for codebook search * |
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429 * - find LTP residual. * |
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430 *---------------------------------------------------------------*/ |
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431 |
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432 Pred_lt_6 (&exc[i_subfr], T0, T0_frac, L_SUBFR); |
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433 |
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434 Convolve (&exc[i_subfr], h1, y1, L_SUBFR); |
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435 |
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436 gain_pit = G_pitch (xn, y1, L_SUBFR); move16 (); |
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437 |
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438 *ana = q_gain_pitch (&gain_pit); move16 (); |
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439 |
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changeset
|
440 } |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
441 else |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
442 { |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
443 gain_pit = 0; move16 (); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
444 } |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
445 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
446 ana++; /* Incrementation of ana is done here to work |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
447 also when no speech activity is present */ |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
448 |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
449 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
450 { |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
451 /* xn2[i] = xn[i] - y1[i] * gain_pit */ |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
452 /* res2[i] -= exc[i+i_subfr] * gain_pit */ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
453 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
454 for (i = 0; i < L_SUBFR; i++) |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
455 { |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
456 L_temp = L_mult (y1[i], gain_pit); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
457 L_temp = L_shl (L_temp, 3); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
458 xn2[i] = sub (xn[i], extract_h (L_temp)); move16 (); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
459 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
460 L_temp = L_mult (exc[i + i_subfr], gain_pit); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
461 L_temp = L_shl (L_temp, 3); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
462 res2[i] = sub (res2[i], extract_h (L_temp)); move16 (); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
463 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
464 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
465 /*-------------------------------------------------------------* |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
466 * - include pitch contribution into impulse resp. h1[] * |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
467 *-------------------------------------------------------------*/ |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
468 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
469 /* pit_sharp = gain_pit; */ |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
470 /* if (pit_sharp > 1.0) pit_sharp = 1.0; */ |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
471 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
472 pit_sharp = shl (gain_pit, 3); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
473 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
474 for (i = T0; i < L_SUBFR; i++) |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
475 { |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
476 temp = mult (h1[i - T0], pit_sharp); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
477 h1[i] = add (h1[i], temp); move16 (); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
478 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
479 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
480 /*--------------------------------------------------------------* |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
481 * - Innovative codebook search (find index and gain) * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
482 *--------------------------------------------------------------*/ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
483 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
484 code_10i40_35bits (xn2, res2, h1, code, y2, ana); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
485 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
486 else |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
487 { |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
488 build_CN_code (code, &st->L_pn_seed_tx); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
489 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
490 ana += 10; move16 (); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
491 |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
492 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
493 { |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
494 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
495 /*-------------------------------------------------------* |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
496 * - Add the pitch contribution to code[]. * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
497 *-------------------------------------------------------*/ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
498 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
499 for (i = T0; i < L_SUBFR; i++) |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
500 { |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
501 temp = mult (code[i - T0], pit_sharp); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
502 code[i] = add (code[i], temp); move16 (); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
503 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
504 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
505 /*------------------------------------------------------* |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
506 * - Quantization of fixed codebook gain. * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
507 *------------------------------------------------------*/ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
508 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
509 gain_code = G_code (xn2, y2); move16 (); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
510 } |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
511 *ana++ = q_gain_code (st, code, L_SUBFR, &gain_code, st->txdtx_ctrl, |
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
512 i_subfr); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
513 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
514 /*------------------------------------------------------* |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
515 * - Find the total excitation * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
516 * - find synthesis speech corresponding to exc[] * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
517 * - update filter memories for finding the target * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
518 * vector in the next subframe * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
519 * (update mem_err[] and mem_w0[]) * |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
520 *------------------------------------------------------*/ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
521 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
522 for (i = 0; i < L_SUBFR; i++) |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
523 { |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
524 /* exc[i] = gain_pit*exc[i] + gain_code*code[i]; */ |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
525 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
526 L_temp = L_mult (exc[i + i_subfr], gain_pit); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
527 L_temp = L_mac (L_temp, code[i], gain_code); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
528 L_temp = L_shl (L_temp, 3); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
529 exc[i + i_subfr] = round (L_temp); move16 (); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
530 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
531 |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
532 Syn_filt (Aq, &exc[i_subfr], &synth[i_subfr], L_SUBFR, st->mem_syn, 1); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
533 |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
534 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0) |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
535 { |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
536 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
537 for (i = L_SUBFR - M, j = 0; i < L_SUBFR; i++, j++) |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
538 { |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
539 st->mem_err[j] = sub (speech[i_subfr + i], synth[i_subfr + i]); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
540 temp = extract_h (L_shl (L_mult (y1[i], gain_pit), 3)); |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
541 k = extract_h (L_shl (L_mult (y2[i], gain_code), 5)); |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
542 st->mem_w0[j] = sub (xn[i], add (temp, k)); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
543 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
544 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
545 else |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
546 { |
58
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
547 Set_zero (st->mem_err, M); |
d285877fc4cc
libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
53
diff
changeset
|
548 Set_zero (st->mem_w0, M); |
53
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
549 } |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
550 |
49dd1ac8e75b
libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
551 /* interpolated LPC parameters for next subframe */ |
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552 A += MP1; move16 (); |
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553 Aq += MP1; move16 (); |
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554 } |
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555 |
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556 /*--------------------------------------------------* |
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557 * Update signal for next frame. * |
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558 * -> shift to the left by L_FRAME: * |
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559 * speech[], wsp[] and exc[] * |
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560 *--------------------------------------------------*/ |
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561 |
58
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562 Copy (&st->old_speech[L_FRAME], &st->old_speech[0], L_TOTAL - L_FRAME); |
53
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563 |
58
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564 Copy (&st->old_wsp[L_FRAME], &st->old_wsp[0], PIT_MAX); |
53
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565 |
58
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566 Copy (&st->old_exc[L_FRAME], &st->old_exc[0], PIT_MAX + L_INTERPOL); |
53
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567 |
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568 return; |
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569 } |