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annotate libtwamr/c2_11pf.c @ 478:936a08cc73ce

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doc/AMR-library-API: describe the decoder
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 19 May 2024 21:32:31 +0000
parents 9bca350be398
children
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319
9bca350be398 libtwamr: integrate c2_11pf.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 : c2_11pf.c
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11 * Purpose : Searches a 11 bit algebraic codebook containing 2 pulses
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12 * in a frame of 40 samples.
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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 *****************************************************************************
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19 * MODULE INCLUDE FILE AND VERSION ID
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20 *****************************************************************************
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21 */
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22 #include "namespace.h"
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23 #include "c2_11pf.h"
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24
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25 /*
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26 *****************************************************************************
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27 * INCLUDE FILES
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28 *****************************************************************************
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29 */
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30 #include "typedef.h"
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31 #include "basic_op.h"
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32 #include "no_count.h"
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33 #include "inv_sqrt.h"
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34 #include "cnst.h"
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35 #include "cor_h.h"
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36 #include "set_sign.h"
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37
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38 /*
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39 *****************************************************************************
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40 * LOCAL VARIABLES AND TABLES
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41 *****************************************************************************
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42 */
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43 #define NB_PULSE 2
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44
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45 #include "c2_11pf.tab"
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46
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47 /*
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48 *****************************************************************************
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49 * DECLARATION OF PROTOTYPES
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50 *****************************************************************************
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51 */
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52 static void search_2i40(
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53 Word16 dn[], /* i : correlation between target and h[] */
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54 Word16 rr[][L_CODE],/* i : matrix of autocorrelation */
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55 Word16 codvec[] /* o : algebraic codebook vector */
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56 );
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57
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58 static Word16 build_code(
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59 Word16 codvec[], /* i : algebraic codebook vector */
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60 Word16 dn_sign[], /* i : sign of dn[] */
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61 Word16 cod[], /* o : algebraic (fixed) codebook excitation */
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62 Word16 h[], /* i : impulse response of weighted synthesis filter */
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63 Word16 y[], /* o : filtered fixed codebook excitation */
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64 Word16 sign[] /* o : sign of 2 pulses */
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65 );
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66
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67 /*
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68 *****************************************************************************
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69 * PUBLIC PROGRAM CODE
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70 *****************************************************************************
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71 */
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72 /*************************************************************************
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73 *
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74 * FUNCTION: code_2i40_11bits()
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75 *
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76 * PURPOSE: Searches a 11 bit algebraic codebook containing 2 pulses
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77 * in a frame of 40 samples.
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78 *
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79 * DESCRIPTION:
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80 * The code length is 40, containing 2 nonzero pulses: i0...i1.
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81 * All pulses can have two possible amplitudes: +1 or -1.
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82 * Pulse i0 can have 2x8=16 possible positions, pulse i1 can have
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83 * 4x8=32 positions.
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84 *
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85 * i0 : 1, 6, 11, 16, 21, 26, 31, 36.
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86 * 3, 8, 13, 18, 23, 28, 33, 38.
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87 * i1 : 0, 5, 10, 15, 20, 25, 30, 35.
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88 * 1, 6, 11, 16, 21, 26, 31, 36.
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89 * 2, 7, 12, 17, 22, 27, 32, 37.
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90 * 4, 9, 14, 19, 24, 29, 34, 39.
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91 *
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92 *************************************************************************/
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93 Word16 code_2i40_11bits(
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94 Word16 x[], /* i : target vector */
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95 Word16 h[], /* i : impulse response of weighted synthesis filter */
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96 /* h[-L_subfr..-1] must be set to zero. */
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97 Word16 T0, /* i : Pitch lag */
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98 Word16 pitch_sharp, /* i : Last quantized pitch gain */
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99 Word16 code[], /* o : Innovative codebook */
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100 Word16 y[], /* o : filtered fixed codebook excitation */
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101 Word16 * sign /* o : Signs of 2 pulses */
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102 )
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103 {
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104 Word16 codvec[NB_PULSE];
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105 Word16 dn[L_CODE], dn2[L_CODE], dn_sign[L_CODE];
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106 Word16 rr[L_CODE][L_CODE];
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107 Word16 i, index, sharp;
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108
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109 sharp = shl(pitch_sharp, 1);
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110 test ();
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111 if (sub(T0, L_CODE) < 0)
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112 {
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113 for (i = T0; i < L_CODE; i++) {
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114 h[i] = add(h[i], mult(h[i - T0], sharp)); move16 ();
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115 }
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116 }
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117
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118 cor_h_x(h, x, dn, 1);
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119 set_sign(dn, dn_sign, dn2, 8); /* dn2[] not used in this codebook search */
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120 cor_h(h, dn_sign, rr);
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121 search_2i40(dn, rr, codvec);
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122 move16 (); /* function result */
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123 index = build_code(codvec, dn_sign, code, h, y, sign);
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124
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125 /*-----------------------------------------------------------------*
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126 * Compute innovation vector gain. *
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127 * Include fixed-gain pitch contribution into code[]. *
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128 *-----------------------------------------------------------------*/
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129
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130 test ();
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131 if (sub(T0, L_CODE) < 0)
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132 {
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133 for (i = T0; i < L_CODE; i++)
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134 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 code[i] = add(code[i], mult(code[i - T0], sharp)); move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 return index;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 /*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 *****************************************************************************
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 * PRIVATE PROGRAM CODE
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 *****************************************************************************
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /*************************************************************************
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 * FUNCTION search_2i40()
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 * PURPOSE: Search the best codevector; determine positions of the 2 pulses
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 * in the 40-sample frame.
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 *************************************************************************/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 #define _1_2 (Word16)(32768L/2)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 #define _1_4 (Word16)(32768L/4)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 #define _1_8 (Word16)(32768L/8)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 #define _1_16 (Word16)(32768L/16)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 static void search_2i40(
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 Word16 dn[], /* i : correlation between target and h[] */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 Word16 rr[][L_CODE], /* i : matrix of autocorrelation */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 Word16 codvec[] /* o : algebraic codebook vector */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 )
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 Word16 i0, i1;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 Word16 ix = 0; /* initialization only needed to keep gcc silent */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 Word16 track1, track2, ipos[NB_PULSE];
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 Word16 psk, ps0, ps1, sq, sq1;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 Word16 alpk, alp, alp_16;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 Word32 s, alp0, alp1;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 Word16 i;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 psk = -1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 alpk = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 for (i = 0; i < NB_PULSE; i++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 codvec[i] = i; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 /*------------------------------------------------------------------*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 * main loop: try 2x4 tracks. *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 *------------------------------------------------------------------*/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 for (track1 = 0; track1 < 2; track1++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 for (track2 = 0; track2 < 4; track2++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 /* fix starting position */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 ipos[0] = startPos1[track1]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 ipos[1] = startPos2[track2]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 /*----------------------------------------------------------------*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 * i0 loop: try 8 positions. *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 *----------------------------------------------------------------*/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 move16 (); /* account for ptr. init. (rr[io]) */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 for (i0 = ipos[0]; i0 < L_CODE; i0 += STEP)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 ps0 = dn[i0]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 alp0 = L_mult(rr[i0][i0], _1_4);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 /*-------------------------------------------------------------*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 * i1 loop: 8 positions. *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 *-------------------------------------------------------------*/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 sq = -1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 alp = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 ix = ipos[1]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 /*---------------------------------------------------------------*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 * These index have low complexity address computation because *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 * they are, in fact, pointers with fixed increment. For example,*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 * "rr[i0][i2]" is a pointer initialized to "&rr[i0][ipos[2]]" *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 * and incremented by "STEP". *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 *---------------------------------------------------------------*/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 move16 (); /* account for ptr. init. (rr[i1]) */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 move16 (); /* account for ptr. init. (dn[i1]) */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 move16 (); /* account for ptr. init. (rr[io]) */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 for (i1 = ipos[1]; i1 < L_CODE; i1 += STEP) {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 ps1 = add(ps0, dn[i1]); /* idx increment = STEP */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 /* alp1 = alp0 + rr[i0][i1] + 1/2*rr[i1][i1]; */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 alp1 = L_mac(alp0, rr[i1][i1], _1_4); /* idx incr = STEP */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 alp1 = L_mac(alp1, rr[i0][i1], _1_2); /* idx incr = STEP */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 sq1 = mult(ps1, ps1);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 alp_16 = round(alp1);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 s = L_msu(L_mult(alp, sq1), sq, alp_16);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 test ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 if (s > 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 sq = sq1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 alp = alp_16; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 ix = i1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 /*---------------------------------------------------------------*
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 * memorise codevector if this one is better than the last one. *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 *---------------------------------------------------------------*/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 s = L_msu(L_mult(alpk, sq), psk, alp);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 test ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 if (s > 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 psk = sq; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 alpk = alp; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 codvec[0] = i0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 codvec[1] = ix; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 return;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 /*************************************************************************
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 * FUNCTION: build_code()
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 * PURPOSE: Builds the codeword, the filtered codeword and index of the
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 * codevector, based on the signs and positions of 2 pulses.
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 *
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 *************************************************************************/
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 static Word16 build_code(
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 Word16 codvec[], /* i : position of pulses */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 Word16 dn_sign[], /* i : sign of pulses */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 Word16 cod[], /* o : innovative code vector */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 Word16 h[], /* i : impulse response of weighted synthesis filter */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 Word16 y[], /* o : filtered innovative code */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 Word16 sign[] /* o : sign of 2 pulses */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 )
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 Word16 i, j, k, track, index, _sign[NB_PULSE], indx, rsign;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 Word16 *p0, *p1;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 Word32 s;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 for (i = 0; i < L_CODE; i++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 cod[i] = 0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 indx = 0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 rsign = 0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 for (k = 0; k < NB_PULSE; k++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 i = codvec[k]; /* read pulse position */ move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 j = dn_sign[i]; /* read sign */ move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 index = mult(i, 6554); /* index = pos/5 */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 /* track = pos%5 */
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 track = sub(i, extract_l(L_shr(L_mult(index, 5), 1)));
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 test (); test (); test (); test ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 if (sub(track, 0) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 track = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 index = shl(index, 6);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 else if (sub(track, 1) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 test ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 if (sub(k, 0) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 track = 0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 index = shl(index, 1);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 else
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 track = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 index = add(shl(index, 6), 16);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 else if (sub(track, 2) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 track = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 index = add(shl(index, 6), 32);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 else if (sub(track, 3) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 track = 0; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 index = add(shl(index, 1), 1);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 else if (sub(track, 4) == 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 track = 1; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 index = add(shl(index, 6), 48);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 test ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 if (j > 0)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340 cod[i] = 8191; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 _sign[k] = 32767; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 rsign = add(rsign, shl(1, track));
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 else
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 cod[i] = -8192; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 _sign[k] = (Word16) - 32768L; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 indx = add(indx, index);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 *sign = rsign; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 p0 = h - codvec[0]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 p1 = h - codvec[1]; move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 for (i = 0; i < L_CODE; i++)
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 {
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 s = 0; move32 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360 s = L_mac(s, *p0++, _sign[0]);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 s = L_mac(s, *p1++, _sign[1]);
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 y[i] = round(s); move16 ();
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 }
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 return indx;
9bca350be398 libtwamr: integrate c2_11pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366 }