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annotate libgsmefr/d_plsf_5.c @ 553:ebcf414b7d99

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doc/TFO-transform: describe details for FRv1, both modes
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 07 Oct 2024 08:24:24 +0000
parents cc08498ed21b
children
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1 /*************************************************************************
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2 *
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3 * FUNCTION: D_plsf_5()
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4 *
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5 * PURPOSE: Decodes the 2 sets of LSP parameters in a frame using the
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6 * received quantization indices.
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7 *
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8 * DESCRIPTION:
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9 * The two sets of LSFs are quantized using split by 5 matrix
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10 * quantization (split-MQ) with 1st order MA prediction.
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11 *
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12 * See "q_plsf_5.c" for more details about the quantization procedure
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13 *
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14 *************************************************************************/
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15
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16 #include "gsm_efr.h"
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17 #include "typedef.h"
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18 #include "namespace.h"
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19 #include "basic_op.h"
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20 #include "no_count.h"
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21 #include "codec.h"
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22 #include "sig_proc.h"
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23 #include "memops.h"
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24
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25 #include "q_plsf5_tab.h" /* Codebooks of LSF prediction residual */
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26
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27 #include "cnst.h"
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28 #include "dtx.h"
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29 #include "dec_state.h"
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31 /* M ->order of linear prediction filter */
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32 /* LSF_GAP -> Minimum distance between LSF after quantization */
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33 /* 50 Hz = 205 */
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34 /* PRED_FAC -> Prediction factor = 0.65 */
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35 /* ALPHA -> 0.9 */
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36 /* ONE_ALPHA-> (1.0-ALPHA) */
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37
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38 #define M 10
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39 #define LSF_GAP 205
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40 #define PRED_FAC 21299
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41 #define ALPHA 31128
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42 #define ONE_ALPHA 1639
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43
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44 void D_plsf_5 (
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45 struct EFR_decoder_state *st,
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46 const Word16 *indice, /* input : quantization indices of 5 submatrices */
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47 Word16 *lsp1_q, /* output: quantized 1st LSP vector */
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48 Word16 *lsp2_q, /* output: quantized 2nd LSP vector */
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49 Word16 bfi, /* input : bad frame indicator (set to 1 if a bad
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50 frame is received) */
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51 Word16 rxdtx_ctrl, /* input : RX DTX control word */
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52 Word16 rx_dtx_state /* input : state of the comfort noise insertion
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53 period */
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54 )
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55 {
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56 Word16 i;
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57 const Word16 *p_dico;
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58 Word16 temp, sign;
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59 Word16 lsf1_r[M], lsf2_r[M];
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60 Word16 lsf1_q[M], lsf2_q[M];
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61
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62 /* Update comfort noise LSF quantizer memory */
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63 if ((rxdtx_ctrl & RX_UPD_SID_QUANT_MEM) != 0)
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64 {
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65 update_lsf_p_CN (st->lsf_old_rx, st->lsf_p_CN);
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66 }
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67 /* Handle cases of comfort noise LSF decoding in which past
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68 valid SID frames are repeated */
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69
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70 if (((rxdtx_ctrl & RX_NO_TRANSMISSION) != 0)
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71 || ((rxdtx_ctrl & RX_INVALID_SID_FRAME) != 0)
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72 || ((rxdtx_ctrl & RX_LOST_SID_FRAME) != 0))
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73 {
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74
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75 if ((rxdtx_ctrl & RX_NO_TRANSMISSION) != 0)
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76 {
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77 /* DTX active: no transmission. Interpolate LSF values in memory */
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78 interpolate_CN_lsf (st->lsf_old_CN, st->lsf_new_CN, lsf2_q,
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79 rx_dtx_state);
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80 }
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81 else
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82 { /* Invalid or lost SID frame: use LSFs
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83 from last good SID frame */
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84 for (i = 0; i < M; i++)
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85 {
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86 st->lsf_old_CN[i] = st->lsf_new_CN[i];
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87 lsf2_q[i] = st->lsf_new_CN[i];
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88 st->past_r2_q[i] = 0;
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89 }
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90 }
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91
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92 for (i = 0; i < M; i++)
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93 {
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94 st->past_lsf_q[i] = lsf2_q[i];
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95 }
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96
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97 /* convert LSFs to the cosine domain */
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98 Lsf_lsp (lsf2_q, lsp2_q, M);
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99
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100 return;
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101 }
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102
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103 if (bfi != 0) /* if bad frame */
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104 {
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105 /* use the past LSFs slightly shifted towards their mean */
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106
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107 for (i = 0; i < M; i++)
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108 {
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109 /* lsfi_q[i] = ALPHA*past_lsf_q[i] + ONE_ALPHA*mean_lsf[i]; */
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110
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111 lsf1_q[i] = add (mult (st->past_lsf_q[i], ALPHA),
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112 mult (mean_lsf[i], ONE_ALPHA));
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113
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114 lsf2_q[i] = lsf1_q[i];
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115 }
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116
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117 /* estimate past quantized residual to be used in next frame */
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118
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119 for (i = 0; i < M; i++)
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120 {
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121 /* temp = mean_lsf[i] + past_r2_q[i] * PRED_FAC; */
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122
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
123 temp = add (mean_lsf[i], mult (st->past_r2_q[i], PRED_FAC));
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
125 st->past_r2_q[i] = sub (lsf2_q[i], temp);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 /* if good LSFs received */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 /* decode prediction residuals from 5 received indices */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 p_dico = &dico1_lsf[shl (indice[0], 2)];
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 lsf1_r[0] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 lsf1_r[1] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 lsf2_r[0] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 lsf2_r[1] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 p_dico = &dico2_lsf[shl (indice[1], 2)];
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 lsf1_r[2] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 lsf1_r[3] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 lsf2_r[2] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 lsf2_r[3] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 sign = indice[2] & 1; logic16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 i = shr (indice[2], 1);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 p_dico = &dico3_lsf[shl (i, 2)]; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 test ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 if (sign == 0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 lsf1_r[4] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 lsf1_r[5] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 lsf2_r[4] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 lsf2_r[5] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 lsf1_r[4] = negate (*p_dico++); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 lsf1_r[5] = negate (*p_dico++); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 lsf2_r[4] = negate (*p_dico++); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 lsf2_r[5] = negate (*p_dico++); move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 p_dico = &dico4_lsf[shl (indice[3], 2)];move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 lsf1_r[6] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 lsf1_r[7] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 lsf2_r[6] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 lsf2_r[7] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 p_dico = &dico5_lsf[shl (indice[4], 2)];move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 lsf1_r[8] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 lsf1_r[9] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 lsf2_r[8] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 lsf2_r[9] = *p_dico++; move16 ();
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 /* Compute quantized LSFs and update the past quantized residual */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 /* Use lsf_p_CN as predicted LSF vector in case of no speech
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 activity */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 if ((rxdtx_ctrl & RX_SP_FLAG) != 0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 for (i = 0; i < M; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
185 temp = add (mean_lsf[i], mult (st->past_r2_q[i], PRED_FAC));
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 lsf1_q[i] = add (lsf1_r[i], temp);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 lsf2_q[i] = add (lsf2_r[i], temp);
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
188 st->past_r2_q[i] = lsf2_r[i];
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 { /* Valid SID frame */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 for (i = 0; i < M; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
195 lsf2_q[i] = add (lsf2_r[i], st->lsf_p_CN[i]);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 /* Use the dequantized values of lsf2 also for lsf1 */
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
198 lsf1_q[i] = lsf2_q[i];
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
200 st->past_r2_q[i] = 0;
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 /* verification that LSFs have minimum distance of LSF_GAP Hz */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 Reorder_lsf (lsf1_q, LSF_GAP, M);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 Reorder_lsf (lsf2_q, LSF_GAP, M);
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 if ((rxdtx_ctrl & RX_FIRST_SID_UPDATE) != 0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 for (i = 0; i < M; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
214 st->lsf_new_CN[i] = lsf2_q[i];
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 if ((rxdtx_ctrl & RX_CONT_SID_UPDATE) != 0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 for (i = 0; i < M; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
221 st->lsf_old_CN[i] = st->lsf_new_CN[i];
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
222 st->lsf_new_CN[i] = lsf2_q[i];
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 if ((rxdtx_ctrl & RX_SP_FLAG) != 0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 {
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 /* Update lsf history with quantized LSFs
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 when speech activity is present. If the current frame is
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 a bad one, update with most recent good comfort noise LSFs */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 if (bfi==0)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
233 update_lsf_history (lsf1_q, lsf2_q, st->lsf_old_rx);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 else
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
237 update_lsf_history (st->lsf_new_CN, st->lsf_new_CN, st->lsf_old_rx);
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 for (i = 0; i < M; i++)
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 53
diff changeset
242 st->lsf_old_CN[i] = lsf2_q[i];
53
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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244 }
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
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245 else
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246 {
63
6a623cb57d07 libgsmefr: d_plsf_5.c compiles
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247 interpolate_CN_lsf (st->lsf_old_CN, st->lsf_new_CN, lsf2_q,
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248 rx_dtx_state);
53
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249 }
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250
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251 for (i = 0; i < M; i++)
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252 {
63
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253 st->past_lsf_q[i] = lsf2_q[i];
53
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254 }
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255
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256 /* convert LSFs to the cosine domain */
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257
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258 Lsf_lsp (lsf1_q, lsp1_q, M);
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259 Lsf_lsp (lsf2_q, lsp2_q, M);
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260
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261 return;
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262 }