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annotate libtwamr/d_plsf_3.c @ 498:65f672c43dc8

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libgsmhr1/typedefs.h: import original
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 19 Jun 2024 00:49:48 +0000
parents 05a46720af0f
children
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : d_plsf_3.c
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11 * Purpose : Decodes the LSP parameters using the received
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12 * quantization indices. 1st order MA prediction and
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13 * split by 3 vector quantization (split-VQ)
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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 /*
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19 ********************************************************************************
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20 * MODULE INCLUDE FILE AND VERSION ID
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21 ********************************************************************************
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22 */
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23 #include "namespace.h"
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24 #include "d_plsf.h"
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25
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26 /*
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27 ********************************************************************************
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28 * INCLUDE FILES
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29 ********************************************************************************
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30 */
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31 #include "typedef.h"
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32 #include "basic_op.h"
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33 #include "no_count.h"
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34 #include "lsp_lsf.h"
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35 #include "reorder.h"
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36 #include "memops.h"
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37 #include "q_plsf3_tab.h"
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38
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39 /*
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40 ********************************************************************************
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41 * LOCAL VARIABLES AND TABLES
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42 ********************************************************************************
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43 */
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44
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45 /* ALPHA -> 0.9 */
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46 /* ONE_ALPHA-> (1.0-ALPHA) */
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47
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48 #define ALPHA 29491
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49 #define ONE_ALPHA 3277
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50
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51 /*
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52 ********************************************************************************
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53 * PUBLIC PROGRAM CODE
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54 ********************************************************************************
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55 */
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56 /*************************************************************************
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57 *
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58 * FUNCTION: D_plsf_3()
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59 *
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60 * PURPOSE: Decodes the LSP parameters using the received quantization
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61 * indices.1st order MA prediction and split by 3 vector
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62 * quantization (split-VQ)
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63 *
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64 *************************************************************************/
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65
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66 void D_plsf_3(
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67 D_plsfState *st, /* i/o: State struct */
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68 enum Mode mode, /* i : coder mode */
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69 Word16 bfi, /* i : bad frame indicator (set to 1 if a */
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70 /* bad frame is received) */
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71 Word16 * indice, /* i : quantization indices of 3 submatrices, Q0 */
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72 Word16 * lsp1_q /* o : quantized 1st LSP vector, Q15 */
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73 )
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74 {
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75 Word16 i, index;
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76 const Word16 *p_cb1, *p_cb2, *p_cb3, *p_dico;
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77 Word16 temp;
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78 Word16 lsf1_r[M];
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79 Word16 lsf1_q[M];
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80
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81 test ();
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82 if (bfi != 0) /* if bad frame */
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83 {
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84 /* use the past LSFs slightly shifted towards their mean */
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85
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86 for (i = 0; i < M; i++)
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87 {
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88 /* lsfi_q[i] = ALPHA*past_lsf_q[i] + ONE_ALPHA*mean_lsf3[i]; */
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89
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90 lsf1_q[i] = add(mult(st->past_lsf_q[i], ALPHA),
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91 mult(mean_lsf3[i], ONE_ALPHA));
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92 move16 ();
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93 }
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94
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95 /* estimate past quantized residual to be used in next frame */
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96 test();
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97 if (sub(mode, MRDTX) != 0) {
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98 for (i = 0; i < M; i++) {
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99 /* temp = mean_lsf3[i] + past_r2_q[i] * PRED_FAC; */
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100
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101 temp = add(mean_lsf3[i], mult(st->past_r_q[i], pred_fac[i]));
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102
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103 st->past_r_q[i] = sub(lsf1_q[i], temp); move16 ();
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104 }
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105 } else {
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106 for (i = 0; i < M; i++) {
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107 /* temp = mean_lsf3[i] + past_r2_q[i]; */
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108
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109 temp = add(mean_lsf3[i], st->past_r_q[i]);
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110 st->past_r_q[i] = sub(lsf1_q[i], temp); move16 ();
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111 }
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112 }
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113 }
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114 else /* if good LSFs received */
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115 {
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116 test (); test ();
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117 if (sub (mode, MR475) == 0 || sub (mode, MR515) == 0)
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118 { /* MR475, MR515 */
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119 p_cb1 = dico1_lsf3; move16 ();
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120 p_cb2 = dico2_lsf3; move16 ();
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121 p_cb3 = mr515_3_lsf; move16 ();
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122 }
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123 else if (sub (mode, MR795) == 0)
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124 { /* MR795 */
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125 test();
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126 p_cb1 = mr795_1_lsf; move16 ();
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127 p_cb2 = dico2_lsf3; move16 ();
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128 p_cb3 = dico3_lsf3; move16 ();
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129 }
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130 else
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 { /* MR59, MR67, MR74, MR102, MRDTX */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 test();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 p_cb1 = dico1_lsf3; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 p_cb2 = dico2_lsf3; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 p_cb3 = dico3_lsf3; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 /* decode prediction residuals from 3 received indices */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 index = *indice++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 p_dico = &p_cb1[add(index, add(index, index))]; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 lsf1_r[0] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 lsf1_r[1] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 lsf1_r[2] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 index = *indice++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 test (); test ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 if ((sub (mode, MR475) == 0) || (sub (mode, MR515) == 0))
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 { /* MR475, MR515 only using every second entry */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 index = shl(index,1);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 p_dico = &p_cb2[add(index, add(index, index))]; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 lsf1_r[3] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 lsf1_r[4] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 lsf1_r[5] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 index = *indice++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 p_dico = &p_cb3[shl(index, 2)]; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 lsf1_r[6] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 lsf1_r[7] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 lsf1_r[8] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 lsf1_r[9] = *p_dico++; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 /* Compute quantized LSFs and update the past quantized residual */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 if (sub(mode, MRDTX) != 0)
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 for (i = 0; i < M; i++) {
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 temp = add(mean_lsf3[i], mult(st->past_r_q[i], pred_fac[i]));
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 lsf1_q[i] = add(lsf1_r[i], temp); move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 st->past_r_q[i] = lsf1_r[i]; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 else
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 for (i = 0; i < M; i++) {
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 temp = add(mean_lsf3[i], st->past_r_q[i]);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 lsf1_q[i] = add(lsf1_r[i], temp); move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 st->past_r_q[i] = lsf1_r[i]; move16 ();
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 /* verification that LSFs has minimum distance of LSF_GAP Hz */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 Reorder_lsf(lsf1_q, LSF_GAP, M);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 Copy (lsf1_q, st->past_lsf_q, M);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 /* convert LSFs to the cosine domain */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 Lsf_lsp(lsf1_q, lsp1_q, M);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 return;
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 }
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 void Init_D_plsf_3(D_plsfState *st, /* i/o: State struct */
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 Word16 index /* i : past_rq_init[] index [0, 7] */)
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 {
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 Copy(&past_rq_init[index * M], st->past_r_q, M);
05a46720af0f libtwamr: integrate d_plsf_3.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 }