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annotate libtwamr/q_plsf_5.c @ 550:de333989a12b

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document gsm[e]fr-decode-tw5[-r] utilities
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 05 Oct 2024 02:16:48 +0000
parents 128ec87489b6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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128ec87489b6 libtwamr: integrate q_plsf_5.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 : q_plsf_5.c
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11 * Purpose : Quantization of 2 sets of LSF parameters using 1st
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12 * order MA prediction and split by 5 matrix
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13 * quantization (split-MQ)
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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 "q_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 "lsfwt.h"
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37 #include "q_plsf5_tab.h"
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38
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39 /*
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40 ********************************************************************************
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41 * LOCAL PROGRAM CODE
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42 ********************************************************************************
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43 */
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44 /* Quantization of a 4 dimensional subvector */
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45
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46 static Word16 Vq_subvec (/* o : quantization index, Q0 */
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47 Word16 *lsf_r1, /* i : 1st LSF residual vector, Q15 */
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48 Word16 *lsf_r2, /* i : 2nd LSF residual vector, Q15 */
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49 const Word16 *dico, /* i : quantization codebook, Q15 */
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50 Word16 *wf1, /* i : 1st LSF weighting factors Q13 */
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51 Word16 *wf2, /* i : 2nd LSF weighting factors Q13 */
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52 Word16 dico_size /* i : size of quantization codebook, Q0 */
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53 )
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54 {
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55 Word16 index = 0; /* initialization only needed to keep gcc silent */
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56 Word16 i, temp;
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57 const Word16 *p_dico;
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58 Word32 dist_min, dist;
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59
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60 dist_min = MAX_32; move32 ();
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61 p_dico = dico; move16 ();
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62
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63 for (i = 0; i < dico_size; i++)
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64 {
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65 temp = sub (lsf_r1[0], *p_dico++);
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66 temp = mult (wf1[0], temp);
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67 dist = L_mult (temp, temp);
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68
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69 temp = sub (lsf_r1[1], *p_dico++);
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70 temp = mult (wf1[1], temp);
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71 dist = L_mac (dist, temp, temp);
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72
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73 temp = sub (lsf_r2[0], *p_dico++);
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74 temp = mult (wf2[0], temp);
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75 dist = L_mac (dist, temp, temp);
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76
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77 temp = sub (lsf_r2[1], *p_dico++);
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78 temp = mult (wf2[1], temp);
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79 dist = L_mac (dist, temp, temp);
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80
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81 test ();
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82 if (L_sub (dist, dist_min) < (Word32) 0)
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83 {
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84 dist_min = dist; move32 ();
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85 index = i; move16 ();
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86 }
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87 }
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88
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89 /* Reading the selected vector */
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90
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91 p_dico = &dico[shl (index, 2)]; move16 ();
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92 lsf_r1[0] = *p_dico++; move16 ();
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93 lsf_r1[1] = *p_dico++; move16 ();
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94 lsf_r2[0] = *p_dico++; move16 ();
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95 lsf_r2[1] = *p_dico++; move16 ();
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96
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97 return index;
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98 }
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99
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100 /* Quantization of a 4 dimensional subvector with a signed codebook */
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101
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102 static Word16 Vq_subvec_s ( /* o : quantization index Q0 */
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103 Word16 *lsf_r1, /* i : 1st LSF residual vector Q15 */
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104 Word16 *lsf_r2, /* i : and LSF residual vector Q15 */
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105 const Word16 *dico, /* i : quantization codebook Q15 */
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106 Word16 *wf1, /* i : 1st LSF weighting factors Q13 */
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107 Word16 *wf2, /* i : 2nd LSF weighting factors Q13 */
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108 Word16 dico_size) /* i : size of quantization codebook Q0 */
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109 {
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110 Word16 index = 0; /* initialization only needed to keep gcc silent */
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111 Word16 sign = 0; /* initialization only needed to keep gcc silent */
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112 Word16 i, temp;
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113 const Word16 *p_dico;
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114 Word32 dist_min, dist;
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115
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116 dist_min = MAX_32; move32 ();
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117 p_dico = dico; move16 ();
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118
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119 for (i = 0; i < dico_size; i++)
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120 {
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121 /* test positive */
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122
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123 temp = sub (lsf_r1[0], *p_dico++);
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124 temp = mult (wf1[0], temp);
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125 dist = L_mult (temp, temp);
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126
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127 temp = sub (lsf_r1[1], *p_dico++);
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128 temp = mult (wf1[1], temp);
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129 dist = L_mac (dist, temp, temp);
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130
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parents:
diff changeset
131 temp = sub (lsf_r2[0], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 temp = mult (wf2[0], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 dist = L_mac (dist, temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 temp = sub (lsf_r2[1], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 temp = mult (wf2[1], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 dist = L_mac (dist, temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 test ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 if (L_sub (dist, dist_min) < (Word32) 0)
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 dist_min = dist; move32 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 index = i; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 sign = 0; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* test negative */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 p_dico -= 4; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 temp = add (lsf_r1[0], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 temp = mult (wf1[0], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 dist = L_mult (temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 temp = add (lsf_r1[1], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 temp = mult (wf1[1], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 dist = L_mac (dist, temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 temp = add (lsf_r2[0], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 temp = mult (wf2[0], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 dist = L_mac (dist, temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 temp = add (lsf_r2[1], *p_dico++);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 temp = mult (wf2[1], temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 dist = L_mac (dist, temp, temp);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 test ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 if (L_sub (dist, dist_min) < (Word32) 0)
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 dist_min = dist; move32 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 index = i; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 sign = 1; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 /* Reading the selected vector */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 p_dico = &dico[shl (index, 2)]; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 test ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 if (sign == 0)
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 lsf_r1[0] = *p_dico++; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 lsf_r1[1] = *p_dico++; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 lsf_r2[0] = *p_dico++; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 lsf_r2[1] = *p_dico++; move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 else
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 lsf_r1[0] = negate (*p_dico++); move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 lsf_r1[1] = negate (*p_dico++); move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 lsf_r2[0] = negate (*p_dico++); move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 lsf_r2[1] = negate (*p_dico++); move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 index = shl (index, 1);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 index = add (index, sign);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 return index;
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 }
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 /*
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 ********************************************************************************
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 * PUBLIC PROGRAM CODE
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 ********************************************************************************
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 /*************************************************************************
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 * FUNCTION: Q_plsf_5()
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 *
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 * PURPOSE: Quantization of 2 sets of LSF parameters using 1st order MA
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 * prediction and split by 5 matrix quantization (split-MQ)
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 *
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 * DESCRIPTION:
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 *
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 * p[i] = pred_factor*past_rq[i]; i=0,...,m-1
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 * r1[i]= lsf1[i] - p[i]; i=0,...,m-1
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 * r2[i]= lsf2[i] - p[i]; i=0,...,m-1
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 * where:
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 * lsf1[i] 1st mean-removed LSF vector.
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 * lsf2[i] 2nd mean-removed LSF vector.
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 * r1[i] 1st residual prediction vector.
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 * r2[i] 2nd residual prediction vector.
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 * past_r2q[i] Past quantized residual (2nd vector).
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 *
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 * The residual vectors r1[i] and r2[i] are jointly quantized using
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 * split-MQ with 5 codebooks. Each 4th dimension submatrix contains 2
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 * elements from each residual vector. The 5 submatrices are as follows:
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 * {r1[0], r1[1], r2[0], r2[1]}; {r1[2], r1[3], r2[2], r2[3]};
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 * {r1[4], r1[5], r2[4], r2[5]}; {r1[6], r1[7], r2[6], r2[7]};
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 * {r1[8], r1[9], r2[8], r2[9]};
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 *
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 *************************************************************************/
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 void Q_plsf_5 (
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 Q_plsfState *st,
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 Word16 *lsp1, /* i : 1st LSP vector, Q15 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 Word16 *lsp2, /* i : 2nd LSP vector, Q15 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 Word16 *lsp1_q, /* o : quantized 1st LSP vector, Q15 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 Word16 *lsp2_q, /* o : quantized 2nd LSP vector, Q15 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 Word16 *indice /* o : quantization indices of 5 matrices, Q0 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 )
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 Word16 i;
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 Word16 lsf1[M], lsf2[M], wf1[M], wf2[M], lsf_p[M], lsf_r1[M], lsf_r2[M];
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 Word16 lsf1_q[M], lsf2_q[M];
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 /* convert LSFs to normalize frequency domain 0..16384 */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 Lsp_lsf (lsp1, lsf1, M);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 Lsp_lsf (lsp2, lsf2, M);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 /* Compute LSF weighting factors (Q13) */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 Lsf_wt (lsf1, wf1);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 Lsf_wt (lsf2, wf2);
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 /* Compute predicted LSF and prediction error */
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 for (i = 0; i < M; i++)
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 {
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 lsf_p[i] = add (mean_lsf[i], mult (st->past_rq[i], LSP_PRED_FAC_MR122));
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 move16 ();
128ec87489b6 libtwamr: integrate q_plsf_5.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 lsf_r1[i] = sub (lsf1[i], lsf_p[i]); move16 ();
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261 lsf_r2[i] = sub (lsf2[i], lsf_p[i]); move16 ();
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262 }
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263
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264 /*---- Split-MQ of prediction error ----*/
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265
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266 indice[0] = Vq_subvec (&lsf_r1[0], &lsf_r2[0], dico1_lsf,
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267 &wf1[0], &wf2[0], DICO1_SIZE);
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268 move16 ();
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269
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270 indice[1] = Vq_subvec (&lsf_r1[2], &lsf_r2[2], dico2_lsf,
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271 &wf1[2], &wf2[2], DICO2_SIZE);
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272 move16 ();
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273
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274 indice[2] = Vq_subvec_s (&lsf_r1[4], &lsf_r2[4], dico3_lsf,
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275 &wf1[4], &wf2[4], DICO3_SIZE);
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276 move16 ();
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277
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278 indice[3] = Vq_subvec (&lsf_r1[6], &lsf_r2[6], dico4_lsf,
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279 &wf1[6], &wf2[6], DICO4_SIZE);
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280 move16 ();
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281
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282 indice[4] = Vq_subvec (&lsf_r1[8], &lsf_r2[8], dico5_lsf,
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283 &wf1[8], &wf2[8], DICO5_SIZE);
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284 move16 ();
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285
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286 /* Compute quantized LSFs and update the past quantized residual */
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287 for (i = 0; i < M; i++)
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288 {
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289 lsf1_q[i] = add (lsf_r1[i], lsf_p[i]); move16 ();
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290 lsf2_q[i] = add (lsf_r2[i], lsf_p[i]); move16 ();
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291 st->past_rq[i] = lsf_r2[i]; move16 ();
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292 }
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293
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294 /* verification that LSFs has minimum distance of LSF_GAP */
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295
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296 Reorder_lsf (lsf1_q, LSF_GAP, M);
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297 Reorder_lsf (lsf2_q, LSF_GAP, M);
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298
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299 /* convert LSFs to the cosine domain */
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300
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301 Lsf_lsp (lsf1_q, lsp1_q, M);
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parents:
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302 Lsf_lsp (lsf2_q, lsp2_q, M);
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parents:
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303 }