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annotate libtwamr/pitch_fr.c @ 556:18aca50d68df default tip

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doc/Calypso-TCH-downlink: update for FR1 BFI-with-data
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Oct 2024 01:54:00 +0000
parents be8edf9e6bc1
children
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be8edf9e6bc1 libtwamr: integrate pitch_fr.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 : pitch_fr.c
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11 * Purpose : Find the pitch period with 1/3 or 1/6 subsample
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12 * : resolution (closed loop).
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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 "pitch_fr.h"
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23 /*
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24 ********************************************************************************
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25 * INCLUDE FILES
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26 ********************************************************************************
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27 */
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28 #include "typedef.h"
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29 #include "basic_op.h"
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30 #include "oper_32b.h"
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31 #include "no_count.h"
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32 #include "cnst.h"
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33 #include "enc_lag3.h"
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34 #include "enc_lag6.h"
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35 #include "inter_36.h"
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36 #include "inv_sqrt.h"
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37 #include "convolve.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 /*
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46 * mode dependent parameters used in Pitch_fr()
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47 * Note: order of MRxx in 'enum Mode' is important!
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48 */
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49 static const struct {
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50 Word16 max_frac_lag; /* lag up to which fractional lags are used */
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51 Word16 flag3; /* enable 1/3 instead of 1/6 fract. resolution */
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52 Word16 first_frac; /* first fractional to check */
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53 Word16 last_frac; /* last fractional to check */
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54 Word16 delta_int_low; /* integer lag below TO to start search from */
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55 Word16 delta_int_range; /* integer range around T0 */
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56 Word16 delta_frc_low; /* fractional below T0 */
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57 Word16 delta_frc_range; /* fractional range around T0 */
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58 Word16 pit_min; /* minimum pitch */
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59 } mode_dep_parm[8] = {
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60 /* MR475 */ { 84, 1, -2, 2, 5, 10, 5, 9, PIT_MIN },
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61 /* MR515 */ { 84, 1, -2, 2, 5, 10, 5, 9, PIT_MIN },
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62 /* MR59 */ { 84, 1, -2, 2, 3, 6, 5, 9, PIT_MIN },
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63 /* MR67 */ { 84, 1, -2, 2, 3, 6, 5, 9, PIT_MIN },
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64 /* MR74 */ { 84, 1, -2, 2, 3, 6, 5, 9, PIT_MIN },
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65 /* MR795 */ { 84, 1, -2, 2, 3, 6, 10, 19, PIT_MIN },
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66 /* MR102 */ { 84, 1, -2, 2, 3, 6, 5, 9, PIT_MIN },
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67 /* MR122 */ { 94, 0, -3, 3, 3, 6, 5, 9, PIT_MIN_MR122 }
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68 };
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69
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70 /*
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71 ********************************************************************************
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72 * LOCAL PROGRAM CODE
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73 ********************************************************************************
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74 */
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75 /*************************************************************************
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76 *
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77 * FUNCTION: Norm_Corr()
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78 *
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79 * PURPOSE: Find the normalized correlation between the target vector
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80 * and the filtered past excitation.
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81 *
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82 * DESCRIPTION:
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83 * The normalized correlation is given by the correlation between the
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84 * target and filtered past excitation divided by the square root of
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85 * the energy of filtered excitation.
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86 * corr[k] = <x[], y_k[]>/sqrt(y_k[],y_k[])
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87 * where x[] is the target vector and y_k[] is the filtered past
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88 * excitation at delay k.
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89 *
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90 *************************************************************************/
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91 static void Norm_Corr (Word16 exc[], Word16 xn[], Word16 h[], Word16 L_subfr,
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92 Word16 t_min, Word16 t_max, Word16 corr_norm[])
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93 {
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94 Word16 i, j, k;
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95 Word16 corr_h, corr_l, norm_h, norm_l;
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96 Word32 s;
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97
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98 /* Usally dynamic allocation of (L_subfr) */
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99 Word16 excf[L_SUBFR];
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100 Word16 scaling, h_fac, *s_excf, scaled_excf[L_SUBFR];
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101
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102 k = -t_min; move16 ();
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103
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104 /* compute the filtered excitation for the first delay t_min */
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105
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106 Convolve (&exc[k], h, excf, L_subfr);
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107
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108 /* scale "excf[]" to avoid overflow */
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109
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110 for (j = 0; j < L_subfr; j++) {
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111 scaled_excf[j] = shr (excf[j], 2); move16 ();
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112 }
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113
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114 /* Compute 1/sqrt(energy of excf[]) */
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115
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116 s = 0; move32 ();
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117 for (j = 0; j < L_subfr; j++) {
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118 s = L_mac (s, excf[j], excf[j]);
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119 }
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120 test ();
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121 if (L_sub (s, 67108864L) <= 0) { /* if (s <= 2^26) */
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122 s_excf = excf; move16 ();
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123 h_fac = 15 - 12; move16 ();
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124 scaling = 0; move16 ();
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125 }
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126 else {
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127 /* "excf[]" is divided by 2 */
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128 s_excf = scaled_excf; move16 ();
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129 h_fac = 15 - 12 - 2; move16 ();
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 scaling = 2; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 /* loop for every possible period */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 for (i = t_min; i <= t_max; i++) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 /* Compute 1/sqrt(energy of excf[]) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 s = 0; move32 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 for (j = 0; j < L_subfr; j++) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 s = L_mac (s, s_excf[j], s_excf[j]);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 s = Inv_sqrt (s);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 L_Extract (s, &norm_h, &norm_l);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* Compute correlation between xn[] and excf[] */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 s = 0; move32 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 for (j = 0; j < L_subfr; j++) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 s = L_mac (s, xn[j], s_excf[j]);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 L_Extract (s, &corr_h, &corr_l);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 /* Normalize correlation = correlation * (1/sqrt(energy)) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 s = Mpy_32 (corr_h, corr_l, norm_h, norm_l);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 corr_norm[i] = extract_h (L_shl (s, 16));
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 /* modify the filtered excitation excf[] for the next iteration */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 if (sub (i, t_max) != 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 k--;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 for (j = L_subfr - 1; j > 0; j--) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 s = L_mult (exc[k], h[j]);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 s = L_shl (s, h_fac);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 s_excf[j] = add (extract_h (s), s_excf[j - 1]); move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 s_excf[0] = shr (exc[k], scaling); move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 return;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 /*************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 * FUNCTION: searchFrac()
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 * PURPOSE: Find fractional pitch
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 * DESCRIPTION:
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 * The function interpolates the normalized correlation at the
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 * fractional positions around lag T0. The position at which the
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 * interpolation function reaches its maximum is the fractional pitch.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 * Starting point of the search is frac, end point is last_frac.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 * frac is overwritten with the fractional pitch.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 *************************************************************************/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 static void searchFrac (
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 Word16 *lag, /* i/o : integer pitch */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 Word16 *frac, /* i/o : start point of search -
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 fractional pitch */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 Word16 last_frac, /* i : endpoint of search */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 Word16 corr[], /* i : normalized correlation */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 Word16 flag3 /* i : subsample resolution
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 (3: =1 / 6: =0) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 )
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 Word16 i;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 Word16 max;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 Word16 corr_int;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 /* Test the fractions around T0 and choose the one which maximizes */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 /* the interpolated normalized correlation. */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 max = Interpol_3or6 (&corr[*lag], *frac, flag3); move16 (); /* function result */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 for (i = add (*frac, 1); i <= last_frac; i++) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 corr_int = Interpol_3or6 (&corr[*lag], i, flag3);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 if (sub (corr_int, max) > 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 max = corr_int; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 *frac = i; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 test();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 if (flag3 == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 /* Limit the fraction value in the interval [-2,-1,0,1,2,3] */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 if (sub (*frac, -3) == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 *frac = 3; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 *lag = sub (*lag, 1);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 else {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 /* limit the fraction value between -1 and 1 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 if (sub (*frac, -2) == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 *frac = 1; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 *lag = sub (*lag, 1);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 if (sub (*frac, 2) == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 *frac = -1; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 *lag = add (*lag, 1);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 /*************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 * FUNCTION: getRange()
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 * PURPOSE: Sets range around open-loop pitch or integer pitch of last subframe
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 * DESCRIPTION:
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 * Takes integer pitch T0 and calculates a range around it with
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 * t0_min = T0-delta_low and t0_max = (T0-delta_low) + delta_range
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 * t0_min and t0_max are bounded by pitmin and pitmax
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 *************************************************************************/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 static void getRange (
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 Word16 T0, /* i : integer pitch */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 Word16 delta_low, /* i : search start offset */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 Word16 delta_range, /* i : search range */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 Word16 pitmin, /* i : minimum pitch */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 Word16 pitmax, /* i : maximum pitch */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 Word16 *t0_min, /* o : search range minimum */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 Word16 *t0_max) /* o : search range maximum */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 *t0_min = sub(T0, delta_low);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 if (sub(*t0_min, pitmin) < 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 *t0_min = pitmin; move16();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 *t0_max = add(*t0_min, delta_range);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 if (sub(*t0_max, pitmax) > 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 *t0_max = pitmax; move16();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 *t0_min = sub(*t0_max, delta_range);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 /*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 ********************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 * PUBLIC PROGRAM CODE
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 ********************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 /*************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 * Function: Pitch_fr_reset
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 * Purpose: Initializes state memory to zero
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 **************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 void Pitch_fr_reset (Pitch_frState *state)
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 state->T0_prev_subframe = 0;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 /*************************************************************************
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300 * FUNCTION: Pitch_fr()
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 * PURPOSE: Find the pitch period with 1/3 or 1/6 subsample resolution
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 * (closed loop).
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 * DESCRIPTION:
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 * - find the normalized correlation between the target and filtered
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 * past excitation in the search range.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 * - select the delay with maximum normalized correlation.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 * - interpolate the normalized correlation at fractions -3/6 to 3/6
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 * with step 1/6 around the chosen delay.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311 * - The fraction which gives the maximum interpolated value is chosen.
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 *************************************************************************/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 Word16 Pitch_fr ( /* o : pitch period (integer) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 Pitch_frState *st, /* i/o : State struct */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 enum Mode mode, /* i : codec mode */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317 Word16 T_op[], /* i : open loop pitch lags */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 Word16 exc[], /* i : excitation buffer Q0 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 Word16 xn[], /* i : target vector Q0 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320 Word16 h[], /* i : impulse response of synthesis and
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 weighting filters Q12 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 Word16 L_subfr, /* i : Length of subframe */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 Word16 i_subfr, /* i : subframe offset */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 Word16 *pit_frac, /* o : pitch period (fractional) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 Word16 *resu3, /* o : subsample resolution 1/3 (=1) or 1/6 (=0) */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 Word16 *ana_index /* o : index of encoding */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 )
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 Word16 i;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 Word16 t_min, t_max;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 Word16 t0_min, t0_max;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 Word16 max, lag, frac;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 Word16 tmp_lag;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 Word16 *corr;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 Word16 corr_v[40]; /* Total length = t0_max-t0_min+1+2*L_INTER_SRCH */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 Word16 max_frac_lag;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 Word16 flag3, flag4;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 Word16 last_frac;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340 Word16 delta_int_low, delta_int_range;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 Word16 delta_frc_low, delta_frc_range;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 Word16 pit_min;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 Word16 frame_offset;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 Word16 delta_search;
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 * set mode specific variables *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 max_frac_lag = mode_dep_parm[mode].max_frac_lag; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 flag3 = mode_dep_parm[mode].flag3; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352 frac = mode_dep_parm[mode].first_frac; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 last_frac = mode_dep_parm[mode].last_frac; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 delta_int_low = mode_dep_parm[mode].delta_int_low; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 delta_int_range = mode_dep_parm[mode].delta_int_range; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 delta_frc_low = mode_dep_parm[mode].delta_frc_low; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 delta_frc_range = mode_dep_parm[mode].delta_frc_range; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 pit_min = mode_dep_parm[mode].pit_min; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
360
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 * decide upon full or differential search *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 delta_search = 1; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 if ((i_subfr == 0) || (sub(i_subfr,L_FRAME_BY2) == 0)) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370 /* Subframe 1 and 3 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372 test (); test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373 if (((sub(mode, MR475) != 0) && (sub(mode, MR515) != 0)) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 (sub(i_subfr,L_FRAME_BY2) != 0)) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 /* set t0_min, t0_max for full search */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 /* this is *not* done for mode MR475, MR515 in subframe 3 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379 delta_search = 0; /* no differential search */ move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
380
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 /* calculate index into T_op which contains the open-loop */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382 /* pitch estimations for the 2 big subframes */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384 frame_offset = 1; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386 if (i_subfr == 0)
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 frame_offset = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389 /* get T_op from the corresponding half frame and */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 /* set t0_min, t0_max */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 getRange (T_op[frame_offset], delta_int_low, delta_int_range,
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 pit_min, PIT_MAX, &t0_min, &t0_max);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395 else {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 /* mode MR475, MR515 and 3. Subframe: delta search as well */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 getRange (st->T0_prev_subframe, delta_frc_low, delta_frc_range,
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 pit_min, PIT_MAX, &t0_min, &t0_max);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 else {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 /* for Subframe 2 and 4 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 /* get range around T0 of previous subframe for delta search */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 getRange (st->T0_prev_subframe, delta_frc_low, delta_frc_range,
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 pit_min, PIT_MAX, &t0_min, &t0_max);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 * Find interval to compute normalized correlation *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 t_min = sub (t0_min, L_INTER_SRCH);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416 t_max = add (t0_max, L_INTER_SRCH);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 corr = &corr_v[-t_min]; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421 * Compute normalized correlation between target and filtered excitation *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424 Norm_Corr (exc, xn, h, L_subfr, t_min, t_max, corr);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427 * Find integer pitch *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 max = corr[t0_min]; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431 lag = t0_min; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433 for (i = t0_min + 1; i <= t0_max; i++) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435 if (sub (corr[i], max) >= 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 max = corr[i]; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 lag = i; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 * Find fractional pitch *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444 test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445 if ((delta_search == 0) && (sub (lag, max_frac_lag) > 0)) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447 /* full search and integer pitch greater than max_frac_lag */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
448 /* fractional search is not needed, set fractional to zero */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
449
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
450 frac = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
452 else {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
453
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454 /* if differential search AND mode MR475 OR MR515 OR MR59 OR MR67 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 /* then search fractional with 4 bits resolution */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 test (); test (); test (); test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458 if ((delta_search != 0) &&
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
459 ((sub (mode, MR475) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
460 (sub (mode, MR515) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
461 (sub (mode, MR59) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462 (sub (mode, MR67) == 0))) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
463
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
464 /* modify frac or last_frac according to position of last */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 /* integer pitch: either search around integer pitch, */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466 /* or only on left or right side */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468 tmp_lag = st->T0_prev_subframe; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 if ( sub( sub(tmp_lag, t0_min), 5) > 0)
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
471 tmp_lag = add (t0_min, 5);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
472 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
473 if ( sub( sub(t0_max, tmp_lag), 4) > 0)
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
474 tmp_lag = sub (t0_max, 4);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
475
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
476 test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
477 if ((sub (lag, tmp_lag) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
478 (sub (lag, sub(tmp_lag, 1)) == 0)) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
479
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
480 /* normal search in fractions around T0 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
481
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
482 searchFrac (&lag, &frac, last_frac, corr, flag3);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
483
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
484 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
485 else if (sub (lag, sub (tmp_lag, 2)) == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
486 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
487 /* limit search around T0 to the right side */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
488 frac = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
489 searchFrac (&lag, &frac, last_frac, corr, flag3);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
490 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
491 else if (sub (lag, add(tmp_lag, 1)) == 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
492 test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
493 /* limit search around T0 to the left side */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
494 last_frac = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
495 searchFrac (&lag, &frac, last_frac, corr, flag3);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
496 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
497 else {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
498 test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
499 /* no fractional search */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
500 frac = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
501 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
502 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
503 else
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
504 /* test the fractions around T0 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
505 searchFrac (&lag, &frac, last_frac, corr, flag3);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
506 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
507
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
508 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
509 * encode pitch *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
510 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
511
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
512 test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
513 if (flag3 != 0) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
514 /* flag4 indicates encoding with 4 bit resolution; */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
515 /* this is needed for mode MR475, MR515 and MR59 */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
516
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
517 flag4 = 0; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
518 test (); test (); test (); test ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
519 if ( (sub (mode, MR475) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
520 (sub (mode, MR515) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
521 (sub (mode, MR59) == 0) ||
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
522 (sub (mode, MR67) == 0) ) {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
523 flag4 = 1; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
524 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
525
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
526 /* encode with 1/3 subsample resolution */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
527
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
528 *ana_index = Enc_lag3(lag, frac, st->T0_prev_subframe,
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
529 t0_min, t0_max, delta_search, flag4); move16 (); /* function result */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
530
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
531 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
532 else
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
533 {
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
534 /* encode with 1/6 subsample resolution */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
535
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
536 *ana_index = Enc_lag6(lag, frac, t0_min, delta_search); move16 (); /* function result */
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
537 }
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
538
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
539 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
540 * update state variables *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
541 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
542
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
543 st->T0_prev_subframe = lag; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
544
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
545 /*-----------------------------------------------------------------------*
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
546 * update output variables *
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
547 *-----------------------------------------------------------------------*/
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
548
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
549 *resu3 = flag3; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
550
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
551 *pit_frac = frac; move16 ();
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
552
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
553 return (lag);
be8edf9e6bc1 libtwamr: integrate pitch_fr.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
554 }