FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/d_plsf_5.c @ 282:9ee8ad3d4d30

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frtest: rm gsmfr-hand-test and gsmfr-max-out utils These hack programs were never properly documented and were written only as part of a debug chase, in pursuit of a bug that ultimately turned out to be in our then-hacky patch to osmo-bts-sysmo, before beginning of proper patches in Osmocom. These hack programs need to be dropped from the present sw package because they depend on old libgsm, and we are eliminating that dependency.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 05:44:47 +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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30
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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; */
49dd1ac8e75b libgsmefr: import most *.c files from ETSI source
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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
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243 }
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244 }
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245 else
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246 {
63
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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 }