annotate libgsmefr/cod_12k2.c @ 176:9fb22fa4d373

doc/RTP-analysis: document rtp-g711-extr
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 27 Dec 2022 01:29:14 +0000
parents d9ad0f5121e8
children
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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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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 (
58
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133 struct EFR_encoder_state *st,
53
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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
53
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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 */
53
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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)
53
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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;
53
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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;
53
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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);
53
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236
58
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237 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0)
53
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238 {
58
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239 Int_lpc (st->lsp_old_q, lsp_mid_q, lsp_new_q, Aq_t);
53
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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);
53
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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 */
58
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diff changeset
257 Copy (lsp_new, st->lsp_old, M);
116
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258 Copy (lsp_new, st->lsp_old_q, M);
53
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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);
53
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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
58
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288 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0)
53
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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);
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
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293 if (T0_min < PIT_MIN)
53
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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);
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
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298 if (T0_max > PIT_MAX)
53
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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
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
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diff changeset
308 if (st->dtx_mode)
53
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309 {
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310 lags[1] = T_op; move16 ();
58
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diff changeset
311 periodicity_update (st, lags);
53
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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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diff changeset
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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diff changeset
322 * - find the closed-loop pitch parameters *
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diff changeset
323 * - encode the pitch delay *
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diff changeset
324 * - update the impulse response h1[] by including pitch *
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325 * - find target vector for codebook search *
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diff changeset
326 * - codebook search *
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diff changeset
327 * - encode codebook address *
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diff changeset
328 * - VQ of pitch and codebook gains *
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diff changeset
329 * - find synthesis speech *
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diff changeset
330 * - update states of weighting filter *
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331 *----------------------------------------------------------------------*/
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diff changeset
332
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333 /* pointer to interpolated LPC parameters */
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diff changeset
334 A = A_t; move16 ();
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diff changeset
335 /* pointer to interpolated quantized LPC parameters */
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diff changeset
336 Aq = Aq_t; move16 ();
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diff changeset
337
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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338 for (i_subfr = 0; i_subfr < L_FRAME; i_subfr += L_SUBFR)
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diff changeset
339 {
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
340 if ((st->txdtx_ctrl & TX_SP_FLAG) != 0)
53
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341 {
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diff changeset
342
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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343 /*---------------------------------------------------------------*
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344 * Find the weighted LPC coefficients for the weighting filter. *
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diff changeset
345 *---------------------------------------------------------------*/
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diff changeset
346
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diff changeset
347 Weight_Ai (A, F_gamma1, Ap1);
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diff changeset
348
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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349 Weight_Ai (A, F_gamma2, Ap2);
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diff changeset
350
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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diff changeset
351 /*---------------------------------------------------------------*
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352 * Compute impulse response, h1[], of weighted synthesis filter *
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diff changeset
353 *---------------------------------------------------------------*/
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diff changeset
354
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
355 Copy (Ap1, st->ai_zero, M+1);
53
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diff changeset
356
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
357 Syn_filt (Aq, st->ai_zero, h1, L_SUBFR, zero, 0);
53
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diff changeset
358
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diff changeset
359 Syn_filt (Ap2, h1, h1, L_SUBFR, zero, 0);
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diff changeset
360
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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361 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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362 /*---------------------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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363 * Find the target vector for pitch search: *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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diff changeset
364 *---------------------------------------------------------------*/
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
365
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
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366 Residu (Aq, &speech[i_subfr], res2, L_SUBFR); /* LPC residual */
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diff changeset
367
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
368 if ((st->txdtx_ctrl & TX_SP_FLAG) == 0)
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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diff changeset
369 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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diff changeset
370 /* Compute comfort noise excitation gain based on
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371 LP residual energy */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
373 st->CN_excitation_gain = compute_CN_excitation_gain (res2);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 Copy (res2, &exc[i_subfr], L_SUBFR);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
379 Syn_filt (Aq, &exc[i_subfr], error, L_SUBFR, st->mem_err, 0);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
380
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 Residu (Ap1, error, xn, L_SUBFR);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
383 /* target signal xn[] */
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
384 Syn_filt (Ap2, xn, xn, L_SUBFR, st->mem_w0, 0);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386 /*--------------------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 * Closed-loop fractional pitch search *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388 *--------------------------------------------------------------*/
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 /* flag for first and 3th subframe */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391 pit_flag = i_subfr; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 /* set t0_min and t0_max for 3th subf.*/
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
393 if (i_subfr == L_FRAME_BY2)
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 T0_min = sub (T_op, 3);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
397 if (T0_min < PIT_MIN)
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 T0_min = PIT_MIN; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401 T0_max = add (T0_min, 6);
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
402 if (T0_max > PIT_MAX)
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 T0_max = PIT_MAX; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 T0_min = sub (T0_max, 6);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 pit_flag = 0; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 T0 = Pitch_fr6 (&exc[i_subfr], xn, h1, L_SUBFR, T0_min, T0_max,
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 pit_flag, &T0_frac); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 *ana = Enc_lag6 (T0, &T0_frac, &T0_min, &T0_max, PIT_MIN,
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414 PIT_MAX, pit_flag);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416 ana++;
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 /* Incrementation of ana is done here to work also
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 when no speech activity is present */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
420 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
421 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 /*---------------------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424 * - find unity gain pitch excitation (adaptive codebook entry) *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425 * with fractional interpolation. *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 * - find filtered pitch exc. y1[]=exc[] convolved with h1[] *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427 * - compute pitch gain and limit between 0 and 1.2 *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 * - update target vector for codebook search *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 * - find LTP residual. *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 *---------------------------------------------------------------*/
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432 Pred_lt_6 (&exc[i_subfr], T0, T0_frac, L_SUBFR);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 Convolve (&exc[i_subfr], h1, y1, L_SUBFR);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 gain_pit = G_pitch (xn, y1, L_SUBFR); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 *ana = q_gain_pitch (&gain_pit); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443 gain_pit = 0; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446 ana++; /* Incrementation of ana is done here to work
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447 also when no speech activity is present */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451 /* xn2[i] = xn[i] - y1[i] * gain_pit */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454 for (i = 0; i < L_SUBFR; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456 L_temp = L_mult (y1[i], gain_pit);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 L_temp = L_shl (L_temp, 3);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458 xn2[i] = sub (xn[i], extract_h (L_temp)); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462 res2[i] = sub (res2[i], extract_h (L_temp)); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 /*-------------------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466 * - include pitch contribution into impulse resp. h1[] *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467 *-------------------------------------------------------------*/
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469 /* pit_sharp = gain_pit; */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 /* if (pit_sharp > 1.0) pit_sharp = 1.0; */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
480 /*--------------------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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 libgsmefr: import most *.c files from ETSI source
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 */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
552 A += MP1; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
553 Aq += MP1; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
554 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
555
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
556 /*--------------------------------------------------*
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
557 * Update signal for next frame. *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
558 * -> shift to the left by L_FRAME: *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
559 * speech[], wsp[] and exc[] *
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
560 *--------------------------------------------------*/
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
561
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
562 Copy (&st->old_speech[L_FRAME], &st->old_speech[0], L_TOTAL - L_FRAME);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
563
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
564 Copy (&st->old_wsp[L_FRAME], &st->old_wsp[0], PIT_MAX);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
565
58
d285877fc4cc libgsmefr: cod_12k2.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
566 Copy (&st->old_exc[L_FRAME], &st->old_exc[0], PIT_MAX + L_INTERPOL);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
567
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
568 return;
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
569 }