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annotate libtwamr/cbsearch.c @ 458:e26b974f7ba3

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doc/AMR-study-utils: update for the current situation
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 10 May 2024 18:45:36 +0000
parents 4614f1a97e1a
children
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4614f1a97e1a libtwamr: integrate cbsearch.c
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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 : cbsearch.c
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11 * Purpose : Inovative codebook search (find index and gain)
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12 *
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13 *****************************************************************************
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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 * MODULE INCLUDE FILE AND VERSION ID
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19 *****************************************************************************
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20 */
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21 #include "namespace.h"
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22 #include "cbsearch.h"
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23
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24 /*
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25 *****************************************************************************
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26 * INCLUDE FILES
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27 *****************************************************************************
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28 */
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29 #include "tw_amr.h"
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30 #include "typedef.h"
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31 #include "c2_9pf.h"
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32 #include "c2_11pf.h"
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33 #include "c3_14pf.h"
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34 #include "c4_17pf.h"
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35 #include "c8_31pf.h"
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36 #include "c1035pf.h"
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37 #include "basic_op.h"
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38 #include "no_count.h"
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39 #include "cnst.h"
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40
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41 /*
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42 *****************************************************************************
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43 * PUBLIC PROGRAM CODE
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44 *****************************************************************************
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45 */
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46 int cbsearch(Word16 x[], /* i : target vector, Q0 */
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47 Word16 h[], /* i : impulse response of weighted synthesis */
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48 /* filter h[-L_subfr..-1] must be set to */
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49 /* zero. Q12 */
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50 Word16 T0, /* i : Pitch lag */
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51 Word16 pitch_sharp, /* i : Last quantized pitch gain, Q14 */
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52 Word16 gain_pit, /* i : Pitch gain, Q14 */
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53 Word16 res2[], /* i : Long term prediction residual, Q0 */
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54 Word16 code[], /* o : Innovative codebook, Q13 */
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55 Word16 y[], /* o : filtered fixed codebook excitation, Q12 */
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56 Word16 **anap, /* o : Signs of the pulses */
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57 enum Mode mode,/* i : coder mode */
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58 Word16 subNr) /* i : subframe number */
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59 {
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60 Word16 index;
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61 Word16 i, temp, pit_sharpTmp;
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62
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63 /* For MR74, the pre and post CB pitch sharpening is included in the
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64 * codebook search routine, while for MR122 is it not.
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65 */
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66
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67 test (); test ();
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68 if ((sub (mode, MR475) == 0) || (sub (mode, MR515) == 0))
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69 { /* MR475, MR515 */ move16 ();
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70 *(*anap)++ = code_2i40_9bits(subNr, x, h, T0, pitch_sharp,
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71 code, y, &index);
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72 *(*anap)++ = index; /* sign index */ move16 ();
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73 }
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74 else if (sub (mode, MR59) == 0)
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75 { /* MR59 */
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76 test (); move16 ();
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77 *(*anap)++ = code_2i40_11bits(x, h, T0, pitch_sharp, code, y, &index);
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78 *(*anap)++ = index; /* sign index */ move16 ();
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79 }
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80 else if (sub (mode, MR67) == 0)
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81 { /* MR67 */
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82 test (); test (); move16 ();
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83 *(*anap)++ = code_3i40_14bits(x, h, T0, pitch_sharp, code, y, &index);
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84 *(*anap)++ = index; /* sign index */ move16 ();
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85 }
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86 else if (sub (mode, MR74) == 0 || sub (mode, MR795) == 0)
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87 { /* MR74, MR795 */
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88 test (); test (); test (); move16 ();
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89 *(*anap)++ = code_4i40_17bits(x, h, T0, pitch_sharp, code, y, &index);
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90 *(*anap)++ = index; /* sign index */ move16 ();
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91 }
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92 else if (sub (mode, MR102) == 0)
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93 { /* MR102 */
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94 test (); test (); test ();
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95 /*-------------------------------------------------------------*
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96 * - include pitch contribution into impulse resp. h1[] *
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97 *-------------------------------------------------------------*/
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98 /* pit_sharpTmp = pit_sharp; */
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99 /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */
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100 pit_sharpTmp = shl (pitch_sharp, 1);
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101 for (i = T0; i < L_SUBFR; i++)
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102 {
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103 temp = mult(h[i - T0], pit_sharpTmp);
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104 h[i] = add(h[i], temp); move16 ();
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105 }
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106
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107 /*--------------------------------------------------------------*
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108 * - Innovative codebook search (find index and gain) *
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109 *--------------------------------------------------------------*/
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110 code_8i40_31bits (x, res2, h, code, y, *anap);
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111 *anap += 7; add(0,0);
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112
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113 /*-------------------------------------------------------*
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114 * - Add the pitch contribution to code[]. *
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115 *-------------------------------------------------------*/
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116 for (i = T0; i < L_SUBFR; i++)
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117 {
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118 temp = mult (code[i - T0], pit_sharpTmp);
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119 code[i] = add (code[i], temp); move16 ();
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120 }
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121 }
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122 else
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123 { /* MR122 */
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124 /*-------------------------------------------------------------*
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125 * - include pitch contribution into impulse resp. h1[] *
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126 *-------------------------------------------------------------*/
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127 test (); test (); test ();
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128
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129 /* pit_sharpTmp = gain_pit; */
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130 /* if (pit_sharpTmp > 1.0) pit_sharpTmp = 1.0; */
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131 pit_sharpTmp = shl (gain_pit, 1);
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132
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133 for (i = T0; i < L_SUBFR; i++)
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134 {
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135 temp = mult(h[i - T0], pit_sharpTmp);
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136 h[i] = add(h[i], temp); move16 ();
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137 }
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138 /*--------------------------------------------------------------*
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139 * - Innovative codebook search (find index and gain) *
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140 *--------------------------------------------------------------*/
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141
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142 code_10i40_35bits (x, res2, h, code, y, *anap);
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143 *anap += 10; add(0,0);
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144
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145 /*-------------------------------------------------------*
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146 * - Add the pitch contribution to code[]. *
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147 *-------------------------------------------------------*/
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148 for (i = T0; i < L_SUBFR; i++)
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149 {
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150 temp = mult (code[i - T0], pit_sharpTmp);
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151 code[i] = add (code[i], temp); move16 ();
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152 }
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153 }
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154
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155 return 0;
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156 }