FreeCalypso > hg > gsm-codec-lib
annotate libgsmefr/cod_12k2.c @ 183:452c1d5a6268
libgsmefr BFI w/o data: emit zero output after decoder reset
In real-life usage, each EFR decoder session will most likely begin
with lots of BFI frames before the first real frame arrives. However,
because the spec-defined home state of the decoder is speech rather
than CN, our regular logic for BFI w/o data would have to feed
pseudorandom noise to the decoder (in the "fixed codebook excitation
pulses" part), which is silly to do at the beginning of the decoder
session right out of reset. Therefore, let's check reset_flag_old,
and if we are still in the reset state, simply emit zero output.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 03 Jan 2023 00:12:18 +0000 |
parents | d9ad0f5121e8 |
children |
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, 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 (); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
439 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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
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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
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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
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
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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
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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
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
472 pit_sharp = shl (gain_pit, 3); |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
473 |
49dd1ac8e75b
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
474 for (i = T0; i < L_SUBFR; i++) |
49dd1ac8e75b
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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
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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
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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
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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
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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 } |
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550 |
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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 } |