annotate libgsmefr/vad.c @ 153:14b627682458

gsmfr-decode-r utility put together
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Dec 2022 23:11:20 +0000
parents 756605c4850f
children 1c108dd5b33f
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1 /***************************************************************************
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2 *
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3 * File Name: vad.c
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4 *
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5 * Purpose: Contains all functions for voice activity detection, as
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6 * described in the high level specification of VAD.
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7 *
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8 * Below is a listing of all the functions appearing in the file.
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9 * The functions are arranged according to their purpose. Under
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10 * each heading, the ordering is hierarchical.
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11 *
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12 * Resetting of static variables of VAD:
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13 * reset_vad()
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14 *
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15 * Main routine of VAD (called by the speech encoder):
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16 * vad_computation()
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17 * Adaptive filtering and energy computation:
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18 * energy_computation()
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19 * Averaging of autocorrelation function values:
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20 * acf_averaging()
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21 * Computation of predictor values:
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22 * predictor_values()
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23 * schur_recursion()
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24 * step_up()
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25 * compute_rav1()
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26 * Spectral comparison:
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27 * spectral_comparison()
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28 * Information tone detection:
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29 * tone_detection()
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30 * step_up()
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31 * Threshold adaptation:
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32 * threshold_adaptation()
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33 * VAD decision:
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34 * vad_decision()
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35 * VAD hangover addition:
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36 * vad_hangover()
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37 *
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38 * Periodicity detection routine (called by the speech encoder):
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39 * periodicity_detection()
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40 *
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41 **************************************************************************/
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42
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43 #include "gsm_efr.h"
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44 #include "typedef.h"
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45 #include "namespace.h"
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46 #include "cnst.h"
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47 #include "basic_op.h"
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48 #include "oper_32b.h"
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49 #include "no_count.h"
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50 #include "vad.h"
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51 #include "enc_state.h"
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53 /* Constants of VAD hangover addition */
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54
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55 #define HANGCONST 10
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56 #define BURSTCONST 3
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57
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58 /* Constant of spectral comparison */
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59
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60 #define STAT_THRESH 3670L /* 0.056 */
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62 /* Constants of periodicity detection */
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64 #define LTHRESH 2
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65 #define NTHRESH 4
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66
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67 /* Pseudo floating point representations of constants
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68 for threshold adaptation */
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69
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70 #define M_PTH 32500 /*** 130000.0 ***/
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71 #define E_PTH 17
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72 #define M_PLEV 21667 /*** 346666.7 ***/
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73 #define E_PLEV 19
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74 #define M_MARGIN 16927 /*** 69333340 ***/
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75 #define E_MARGIN 27
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76
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77 #define FAC 17203 /* 2.1 */
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78
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79 /* Constants of tone detection */
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80
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81 #define FREQTH 3189
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82 #define PREDTH 1464
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84 /* forward declarations for internal functions */
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85
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86 static void energy_computation (
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87 Word16 r_h[],
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88 Word16 scal_acf,
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89 Word16 rvad[],
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90 Word16 scal_rvad,
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91 Pfloat * acf0,
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92 Pfloat * pvad
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93 );
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94
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95 static void acf_averaging (
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96 struct EFR_encoder_state *st,
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97 Word16 r_h[],
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98 Word16 r_l[],
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99 Word16 scal_acf,
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100 Word32 L_av0[],
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101 Word32 L_av1[]
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102 );
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103
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104 static void predictor_values (
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105 Word32 L_av1[],
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106 Word16 rav1[],
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107 Word16 *scal_rav1
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108 );
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109
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110 static void schur_recursion (
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111 Word32 L_av1[],
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112 Word16 vpar[]
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113 );
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114
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115 static void step_up (
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116 Word16 np,
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117 Word16 vpar[],
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118 Word16 aav1[]
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119 );
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120
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121 static void compute_rav1 (
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122 Word16 aav1[],
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123 Word16 rav1[],
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124 Word16 *scal_rav1
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125 );
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126
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127 static Word16 spectral_comparison (
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128 struct EFR_encoder_state *st,
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129 Word16 rav1[],
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130 Word16 scal_rav1,
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131 Word32 L_av0[]
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132 );
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133
111
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parents: 110
diff changeset
134 static void threshold_adaptation (
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diff changeset
135 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles
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parents: 110
diff changeset
136 Word16 stat,
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
137 Word16 ptch,
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
138 Word16 tone,
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
139 Word16 rav1[],
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parents: 110
diff changeset
140 Word16 scal_rav1,
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diff changeset
141 Pfloat pvad,
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
142 Pfloat acf0,
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parents: 110
diff changeset
143 Word16 rvad[],
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parents: 110
diff changeset
144 Word16 *scal_rvad,
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parents: 110
diff changeset
145 Pfloat * thvad
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
146 );
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parents: 110
diff changeset
147
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parents: 110
diff changeset
148 static void tone_detection (
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parents: 110
diff changeset
149 Word16 rc[],
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parents: 110
diff changeset
150 Word16 *tone
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
151 );
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parents: 110
diff changeset
152
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
153 static Word16 vad_decision (
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
154 Pfloat pvad,
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
155 Pfloat thvad
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
156 );
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parents: 110
diff changeset
157
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
158 static Word16 vad_hangover (
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Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
159 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
160 Word16 vvad
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
161 );
110
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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162
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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163 /*************************************************************************
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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164 *
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Mychaela Falconia <falcon@freecalypso.org>
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165 * FUNCTION NAME: vad_reset
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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166 *
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Mychaela Falconia <falcon@freecalypso.org>
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167 * PURPOSE: Resets the static variables of the VAD to their
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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168 * initial values
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
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169 *
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parents:
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170 *************************************************************************/
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171
111
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diff changeset
172 void vad_reset (struct EFR_encoder_state *st)
110
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parents:
diff changeset
173 {
111
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diff changeset
174 struct vad_state *vst = &st->vad;
110
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parents:
diff changeset
175 Word16 i;
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parents:
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176
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diff changeset
177 /* Initialize rvad variables */
111
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diff changeset
178 vst->rvad[0] = 0x6000;
110
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parents:
diff changeset
179 for (i = 1; i < 9; i++)
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180 {
111
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diff changeset
181 vst->rvad[i] = 0;
110
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parents:
diff changeset
182 }
111
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diff changeset
183 vst->scal_rvad = 7;
110
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parents:
diff changeset
184
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parents:
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185 /* Initialize threshold level */
111
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parents: 110
diff changeset
186 vst->thvad.e = 20; /*** exponent ***/
756605c4850f libgsmefr: vad.c compiles
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parents: 110
diff changeset
187 vst->thvad.m = 27083; /*** mantissa ***/
110
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 /* Initialize ACF averaging variables */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 for (i = 0; i < 27; i++)
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parents:
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191 {
111
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parents: 110
diff changeset
192 vst->L_sacf[i] = 0L;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
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parents:
diff changeset
193 }
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parents:
diff changeset
194 for (i = 0; i < 36; i++)
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parents:
diff changeset
195 {
111
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diff changeset
196 vst->L_sav0[i] = 0L;
110
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parents:
diff changeset
197 }
111
756605c4850f libgsmefr: vad.c compiles
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parents: 110
diff changeset
198 vst->pt_sacf = 0;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
199 vst->pt_sav0 = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
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parents:
diff changeset
201 /* Initialize spectral comparison variable */
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
202 vst->L_lastdm = 0L;
110
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
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parents:
diff changeset
204 /* Initialize threshold adaptation variable */
111
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parents: 110
diff changeset
205 vst->adaptcount = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 /* Initialize VAD hangover addition variables */
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
208 vst->burstcount = 0;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
209 vst->hangcount = -1;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 /* Initialize periodicity detection variables */
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
212 vst->oldlagcount = 0;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
213 vst->veryoldlagcount = 0;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
214 vst->oldlag = 18;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
216 st->ptch = 1;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 * FUNCTION: vad_computation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 * PURPOSE: Returns a decision as to whether the current frame being
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 * processed by the speech encoder contains speech or not.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 * r_l[0..8] autocorrelation of input signal frame (lsb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 * rc[0..3] speech encoder reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 * ptch flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 * RETURN VALUE: vad decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 Word16 vad_computation (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
241 struct EFR_encoder_state *st,
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 Word16 r_l[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 Word16 rc[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 Word16 ptch
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
249 struct vad_state *vst = &st->vad;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 Word32 L_av0[9], L_av1[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 Word16 vad, vvad, rav1[9], scal_rav1, stat, tone;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 Pfloat acf0, pvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
254 energy_computation (r_h, scal_acf, vst->rvad, vst->scal_rvad, &acf0, &pvad);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
255 acf_averaging (st, r_h, r_l, scal_acf, L_av0, L_av1);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 predictor_values (L_av1, rav1, &scal_rav1);
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
257 stat = spectral_comparison (st, rav1, scal_rav1, L_av0);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 tone_detection (rc, &tone);
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
259 threshold_adaptation (st, stat, ptch, tone, rav1, scal_rav1, pvad, acf0,
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
260 vst->rvad, &vst->scal_rvad, &vst->thvad);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
261 vvad = vad_decision (pvad, vst->thvad);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
262 vad = vad_hangover (st, vvad);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 return vad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269 * FUNCTION: energy_computation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271 * PURPOSE: Computes the input and residual energies of the adaptive
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 * filter in a floating point representation.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 * rvad[0..8] autocorrelated adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 * scal_rvad scaling factor for rvad[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 * OUTPUTS: *acf0 signal frame energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 * *pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 void energy_computation (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289 Word16 rvad[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 Word16 scal_rvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 Pfloat * acf0,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 Pfloat * pvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 Word16 i, temp, norm_prod;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 /* r[0] is always greater than zero (no need to test for r[0] == 0) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300 /* Computation of acf0 (exponent and mantissa) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 acf0->e = sub (32, scal_acf); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 acf0->m = r_h[0] & 0x7ff8; move16 (); logic16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 /* Computation of pvad (exponent and mantissa) */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 pvad->e = add (acf0->e, 14); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 pvad->e = sub (pvad->e, scal_rvad); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310 L_temp = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
311
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
312 for (i = 1; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
314 temp = shr (r_h[i], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315 L_temp = L_mac (L_temp, temp, rvad[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
316 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
317
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 temp = shr (r_h[0], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
319 L_temp = L_add (L_temp, L_shr (L_mult (temp, rvad[0]), 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322 if (L_temp <= 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 L_temp = 1L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 norm_prod = norm_l (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 pvad->e = sub (pvad->e, norm_prod); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 pvad->m = extract_h (L_shl (L_temp, norm_prod));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 * FUNCTION: acf_averaging
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338 * PURPOSE: Computes the arrays L_av0[0..8] and L_av1[0..8].
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
339 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
340 * INPUTS: r_h[0..8] autocorrelation of input signal frame (msb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 * r_l[0..8] autocorrelation of input signal frame (lsb)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342 * scal_acf scaling factor for the autocorrelations
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 * OUTPUTS: L_av0[0..8] ACF averaged over last four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 * L_av1[0..8] ACF averaged over previous four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 void acf_averaging (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
352 struct EFR_encoder_state *st,
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 Word16 r_h[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 Word16 r_l[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 Word16 scal_acf,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 Word32 L_av0[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 Word32 L_av1[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
359 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
360 struct vad_state *vst = &st->vad;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
361 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362 Word16 scale;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 scale = add (9, scal_acf);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369 L_temp = L_shr (L_Comp (r_h[i], r_l[i]), scale);
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
370 L_av0[i] = L_add (vst->L_sacf[i], L_temp);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
371 L_av0[i] = L_add (vst->L_sacf[i + 9], L_av0[i]);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
372 L_av0[i] = L_add (vst->L_sacf[i + 18], L_av0[i]);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
373 vst->L_sacf[vst->pt_sacf + i] = L_temp;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
374 L_av1[i] = vst->L_sav0[vst->pt_sav0 + i];
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
375 vst->L_sav0[vst->pt_sav0 + i] = L_av0[i];
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378 /* Update the array pointers */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
380 if (sub (vst->pt_sacf, 18) == 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
381 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
382 vst->pt_sacf = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
386 vst->pt_sacf = add (vst->pt_sacf, 9);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
389 if (sub (vst->pt_sav0, 27) == 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
391 vst->pt_sav0 = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
395 vst->pt_sav0 = add (vst->pt_sav0, 9);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 * FUNCTION: predictor_values
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 * PURPOSE: Computes the array rav[0..8] needed for the spectral
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 * comparison and the threshold adaptation.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 * INPUTS: L_av1[0..8] ACF averaged over previous four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 * OUTPUTS: rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 void predictor_values (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418 Word32 L_av1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 Word16 *scal_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 Word16 vpar[8], aav1[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425 schur_recursion (L_av1, vpar);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 step_up (8, vpar, aav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427 compute_rav1 (aav1, rav1, scal_rav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 * FUNCTION: schur_recursion
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 * PURPOSE: Uses the Schur recursion to compute adaptive filter
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 * reflection coefficients from an autorrelation function.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439 * INPUTS: L_av1[0..8] autocorrelation function
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 * OUTPUTS: vpar[0..7] reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447 void schur_recursion (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
448 Word32 L_av1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
449 Word16 vpar[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
450 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
452 Word16 acf[9], pp[9], kk[9], temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
453 Word16 i, k, m, n;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 /*** Schur recursion with 16-bit arithmetic ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458 if (L_av1[0] == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
459 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
460 for (i = 0; i < 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
461 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462 vpar[i] = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
463 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
464 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466 temp = norm_l (L_av1[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468 for (k = 0; k <= 8; k++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 acf[k] = extract_h (L_shl (L_av1[k], temp)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
471 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
472
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
473 /*** Initialize arrays pp[..] and kk[..] for the recursion: ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
474
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
475 for (i = 1; i <= 7; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
476 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
477 kk[9 - i] = acf[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
478 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
479
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
480 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
481 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
482 pp[i] = acf[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
483 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
484
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
485 /*** Compute Parcor coefficients: ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
486
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
487 for (n = 0; n < 8; n++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
488 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
489 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
490 if ((pp[0] == 0) ||
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
491 (sub (pp[0], abs_s (pp[1])) < 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
492 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
493 for (i = n; i < 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
494 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
495 vpar[i] = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
496 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
497 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
498 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
499 vpar[n] = div_s (abs_s (pp[1]), pp[0]); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
500
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
501 test (); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
502 if (pp[1] > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
503 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
504 vpar[n] = negate (vpar[n]); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
505 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
506 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
507 if (sub (n, 7) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
508 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
509 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
510 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
511 /*** Schur recursion: ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
512
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
513 pp[0] = add (pp[0], mult_r (pp[1], vpar[n])); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
514
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
515 for (m = 1; m <= 7 - n; m++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
516 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
517 pp[m] = add (pp[1 + m], mult_r (kk[9 - m], vpar[n]));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
518 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
519 kk[9 - m] = add (kk[9 - m], mult_r (pp[1 + m], vpar[n]));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
520 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
521 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
522 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
523
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
524 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
525 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
526
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
527 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
528 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
529 * FUNCTION: step_up
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
530 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
531 * PURPOSE: Computes the transversal filter coefficients from the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
532 * reflection coefficients.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
533 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
534 * INPUTS: np filter order (2..8)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
535 * vpar[0..np-1] reflection coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
536 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
537 * OUTPUTS: aav1[0..np] transversal filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
538 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
539 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
540 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
541 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
542
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
543 void step_up (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
544 Word16 np,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
545 Word16 vpar[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
546 Word16 aav1[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
547 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
548 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
549 Word32 L_coef[9], L_work[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
550 Word16 temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
551 Word16 i, m;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
552
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
553 /*** Initialization of the step-up recursion ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
554
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
555 L_coef[0] = 0x20000000L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
556 L_coef[1] = L_shl (L_deposit_l (vpar[0]), 14); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
557
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
558 /*** Loop on the LPC analysis order: ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
559
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
560 for (m = 2; m <= np; m++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
561 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
562 for (i = 1; i < m; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
563 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
564 temp = extract_h (L_coef[m - i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
565 L_work[i] = L_mac (L_coef[i], vpar[m - 1], temp); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
566 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
567
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
568 for (i = 1; i < m; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
569 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
570 L_coef[i] = L_work[i]; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
571 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
572
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
573 L_coef[m] = L_shl (L_deposit_l (vpar[m - 1]), 14); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
574 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
575
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
576 /*** Keep the aav1[0..np] in 15 bits ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
577
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
578 for (i = 0; i <= np; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
579 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
580 aav1[i] = extract_h (L_shr (L_coef[i], 3)); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
581 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
582
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
583 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
584 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
585
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
586 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
587 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
588 * FUNCTION: compute_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
589 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
590 * PURPOSE: Computes the autocorrelation function of the adaptive
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
591 * filter coefficients.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
592 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
593 * INPUTS: aav1[0..8] adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
594 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
595 * OUTPUTS: rav1[0..8] ACF of aav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
596 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
597 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
598 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
599 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
600 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
601
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
602 void compute_rav1 (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
603 Word16 aav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
604 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
605 Word16 *scal_rav1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
606 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
607 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
608 Word32 L_work[9];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
609 Word16 i, k;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
610
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
611 /*** Computation of the rav1[0..8] ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
612
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
613 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
614 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
615 L_work[i] = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
616
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
617 for (k = 0; k <= 8 - i; k++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
618 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
619 L_work[i] = L_mac (L_work[i], aav1[k], aav1[k + i]); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
620 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
621 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
622
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
623 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
624 if (L_work[0] == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
625 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
626 *scal_rav1 = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
627 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
628 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
629 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
630 *scal_rav1 = norm_l (L_work[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
631 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
632
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
633 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
634 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
635 rav1[i] = extract_h (L_shl (L_work[i], *scal_rav1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
636 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
637
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
638 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
639 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
640
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
641 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
642 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
643 * FUNCTION: spectral_comparison
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
644 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
645 * PURPOSE: Computes the stat flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
646 * adaptation decision.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
647 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
648 * INPUTS: rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
649 * *scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
650 * L_av0[0..8] ACF averaged over last four frames
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
651 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
652 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
653 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
654 * RETURN VALUE: flag to indicate spectral stationarity
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
655 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
656 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
657
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
658 Word16 spectral_comparison (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
659 struct EFR_encoder_state *st,
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
660 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
661 Word16 scal_rav1,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
662 Word32 L_av0[]
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
663 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
664 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
665 struct vad_state *vst = &st->vad;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
666 Word32 L_dm, L_sump, L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
667 Word16 stat, sav0[9], shift, divshift, temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
668 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
669
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
670 /*** Re-normalize L_av0[0..8] ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
671
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
672 test (); move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
673 if (L_av0[0] == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
674 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
675 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
676 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
677 sav0[i] = 0x0fff; /* 4095 */ move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
678 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
679 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
680 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
681 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
682 shift = sub (norm_l (L_av0[0]), 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
683 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
684 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
685 sav0[i] = extract_h (L_shl (L_av0[i], shift)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
686 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
687 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
688
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
689 /*** Compute partial sum of dm ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
690
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
691 L_sump = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
692 for (i = 1; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
693 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
694 L_sump = L_mac (L_sump, rav1[i], sav0[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
695 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
696
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
697 /*** Compute the division of the partial sum by sav0[0] ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
698
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
699 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
700 if (L_sump < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
701 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
702 L_temp = L_negate (L_sump);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
703 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
704 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
705 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
706 L_temp = L_sump; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
707 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
708
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
709 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
710 if (L_temp == 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
711 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
712 L_dm = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
713 shift = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
714 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
715 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
716 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
717 sav0[0] = shl (sav0[0], 3); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
718 shift = norm_l (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
719 temp = extract_h (L_shl (L_temp, shift));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
720
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
721 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
722 if (sub (sav0[0], temp) >= 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
723 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
724 divshift = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
725 temp = div_s (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
726 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
727 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
728 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
729 divshift = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
730 temp = sub (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
731 temp = div_s (temp, sav0[0]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
732 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
733
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
734 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
735 if (sub (divshift, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
736 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
737 L_dm = 0x8000L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
738 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
739 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
740 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
741 L_dm = 0L; move32 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
742 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
743
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
744 L_dm = L_shl (L_add (L_dm, L_deposit_l (temp)), 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
745
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
746 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
747 if (L_sump < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
748 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
749 L_dm = L_negate (L_dm);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
750 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
751 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
752
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
753 /*** Re-normalization and final computation of L_dm ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
754
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
755 L_dm = L_shl (L_dm, 14);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
756 L_dm = L_shr (L_dm, shift);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
757 L_dm = L_add (L_dm, L_shl (L_deposit_l (rav1[0]), 11));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
758 L_dm = L_shr (L_dm, scal_rav1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
759
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
760 /*** Compute the difference and save L_dm ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
761
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
762 L_temp = L_sub (L_dm, vst->L_lastdm);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
763 vst->L_lastdm = L_dm;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
764
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
765 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
766 if (L_temp < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
767 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
768 L_temp = L_negate (L_temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
769 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
770 /*** Evaluation of the stat flag ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
771
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
772 L_temp = L_sub (L_temp, STAT_THRESH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
773
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
774 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
775 if (L_temp < 0L)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
776 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
777 stat = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
778 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
779 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
780 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
781 stat = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
782 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
783
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
784 return stat;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
785 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
786
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
787 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
788 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
789 * FUNCTION: threshold_adaptation
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
790 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
791 * PURPOSE: Evaluates the secondary VAD decision. If speech is not
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
792 * present then the noise model rvad and adaptive threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
793 * thvad are updated.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
794 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
795 * INPUTS: stat flag to indicate spectral stationarity
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
796 * ptch flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
797 * tone flag to indicate a tone signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
798 * rav1[0..8] ACF obtained from L_av1
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
799 * scal_rav1 rav1[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
800 * pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
801 * acf0 signal frame energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
802 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
803 * OUTPUTS: rvad[0..8] autocorrelated adaptive filter coefficients
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
804 * *scal_rvad rvad[] scaling factor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
805 * *thvad decision threshold (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
806 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
807 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
808 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
809 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
810
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
811 void threshold_adaptation (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
812 struct EFR_encoder_state *st,
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
813 Word16 stat,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
814 Word16 ptch,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
815 Word16 tone,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
816 Word16 rav1[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
817 Word16 scal_rav1,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
818 Pfloat pvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
819 Pfloat acf0,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
820 Word16 rvad[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
821 Word16 *scal_rvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
822 Pfloat * thvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
823 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
824 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
825 struct vad_state *vst = &st->vad;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
826 Word16 comp, comp2;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
827 Word32 L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
828 Word16 temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
829 Pfloat p_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
830 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
831
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
832 comp = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
833
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
834 /*** Test if acf0 < pth; if yes set thvad to plev ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
835
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
836 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
837 if (sub (acf0.e, E_PTH) < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
838 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
839 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
840 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
841 test (); test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
842 if ((sub (acf0.e, E_PTH) == 0) && (sub (acf0.m, M_PTH) < 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
843 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
844 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
845 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
846 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
847 if (sub (comp, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
848 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
849 thvad->e = E_PLEV; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
850 thvad->m = M_PLEV; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
851
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
852 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
853 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
854 /*** Test if an adaption is required ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
855
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
856 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
857 if (sub (ptch, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
858 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
859 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
860 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
861 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
862 if (stat == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
863 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
864 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
865 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
866 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
867 if (sub (tone, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
868 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
869 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
870 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
871 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
872 if (sub (comp, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
873 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
874 vst->adaptcount = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
875 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
876 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
877 /*** Increment adaptcount ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
878
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
879 vst->adaptcount = add (vst->adaptcount, 1);
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
880 if (sub (vst->adaptcount, 8) <= 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
881 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
882 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
883 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
884 /*** computation of thvad-(thvad/dec) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
885
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
886 thvad->m = sub (thvad->m, shr (thvad->m, 5)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
887
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
888 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
889 if (sub (thvad->m, 0x4000) < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
890 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
891 thvad->m = shl (thvad->m, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
892 thvad->e = sub (thvad->e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
893 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
894 /*** computation of pvad*fac ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
895
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
896 L_temp = L_mult (pvad.m, FAC);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
897 L_temp = L_shr (L_temp, 15);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
898 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
899
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
900 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
901 if (L_temp > 0x7fffL)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
902 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
903 L_temp = L_shr (L_temp, 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
904 p_temp.e = add (p_temp.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
905 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
906 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
907
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
908 /*** test if thvad < pvad*fac ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
909
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
910 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
911 if (sub (thvad->e, p_temp.e) < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
912 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
913 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
914 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
915 test (); test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
916 if ((sub (thvad->e, p_temp.e) == 0) &&
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
917 (sub (thvad->m, p_temp.m) < 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
918 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
919 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
920 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
921 /*** compute minimum(thvad+(thvad/inc), pvad*fac) when comp = 1 ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
922
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
923 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
924 if (sub (comp, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
925 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
926 /*** compute thvad + (thvad/inc) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
927
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
928 L_temp = L_add (L_deposit_l (thvad->m),
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
929 L_deposit_l (shr (thvad->m, 4)));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
930
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
931 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
932 if (L_sub (L_temp, 0x7fffL) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
933 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
934 thvad->m = extract_l (L_shr (L_temp, 1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
935 thvad->e = add (thvad->e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
936 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
937 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
938 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
939 thvad->m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
940 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
941
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
942 comp2 = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
943
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
944 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
945 if (sub (p_temp.e, thvad->e) < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
946 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
947 comp2 = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
948 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
949 test (); test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
950 if ((sub (p_temp.e, thvad->e) == 0) &&
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
951 (sub (p_temp.m, thvad->m) < 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
952 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
953 comp2 = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
954 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
955 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
956 if (sub (comp2, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
957 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
958 thvad->e = p_temp.e;move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
959 thvad->m = p_temp.m;move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
960 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
961 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
962 /*** compute pvad + margin ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
963
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
964 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
965 if (sub (pvad.e, E_MARGIN) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
966 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
967 L_temp = L_add (L_deposit_l (pvad.m), L_deposit_l (M_MARGIN));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
968 p_temp.m = extract_l (L_shr (L_temp, 1)); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
969 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
970 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
971 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
972 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
973 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
974 if (sub (pvad.e, E_MARGIN) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
975 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
976 temp = sub (pvad.e, E_MARGIN);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
977 temp = shr (M_MARGIN, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
978 L_temp = L_add (L_deposit_l (pvad.m), L_deposit_l (temp));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
979
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
980 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
981 if (L_sub (L_temp, 0x7fffL) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
982 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
983 p_temp.e = add (pvad.e, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
984 p_temp.m = extract_l (L_shr (L_temp, 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
985 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
986 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
987 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
988 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
989 p_temp.e = pvad.e; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
990 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
991 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
992 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
993 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
994 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
995 temp = sub (E_MARGIN, pvad.e);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
996 temp = shr (pvad.m, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
997 L_temp = L_add (L_deposit_l (M_MARGIN), L_deposit_l (temp));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
998
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
999 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1000 if (L_sub (L_temp, 0x7fffL) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1001 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1002 p_temp.e = add (E_MARGIN, 1); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1003 p_temp.m = extract_l (L_shr (L_temp, 1));
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1004 move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1005 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1006 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1007 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1008 p_temp.e = E_MARGIN; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1009 p_temp.m = extract_l (L_temp); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1010 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1011 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1012 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1013
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1014 /*** Test if thvad > pvad + margin ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1015
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1016 comp = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1017
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1018 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1019 if (sub (thvad->e, p_temp.e) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1020 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1021 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1022 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1023 test (); test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1024 if ((sub (thvad->e, p_temp.e) == 0) &&
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1025 (sub (thvad->m, p_temp.m) > 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1026 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1027 comp = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1028 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1029 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1030 if (sub (comp, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1031 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1032 thvad->e = p_temp.e; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1033 thvad->m = p_temp.m; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1034 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1035 /*** Normalise and retain rvad[0..8] in memory ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1036
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1037 *scal_rvad = scal_rav1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1038
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1039 for (i = 0; i <= 8; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1040 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1041 rvad[i] = rav1[i]; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1042 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1043
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1044 /*** Set adaptcount to adp + 1 ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1045
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1046 vst->adaptcount = 9;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1047
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1048 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1049 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1050
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1051 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1052 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1053 * FUNCTION: tone_detection
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1054 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1055 * PURPOSE: Computes the tone flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1056 * adaptation decision.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1057 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1058 * INPUTS: rc[0..3] reflection coefficients calculated in the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1059 * speech encoder short term predictor
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1060 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1061 * OUTPUTS: *tone flag to indicate a periodic signal component
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1062 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1063 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1064 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1065 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1066
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1067 void tone_detection (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1068 Word16 rc[],
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1069 Word16 *tone
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1070 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1071 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1072 Word32 L_num, L_den, L_temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1073 Word16 temp, prederr, a[3];
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1074 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1075
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1076 *tone = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1077
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1078 /*** Calculate filter coefficients ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1079
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1080 step_up (2, rc, a);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1081
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1082 /*** Calculate ( a[1] * a[1] ) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1083
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1084 temp = shl (a[1], 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1085 L_den = L_mult (temp, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1086
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1087 /*** Calculate ( 4*a[2] - a[1]*a[1] ) ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1088
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1089 L_temp = L_shl (L_deposit_h (a[2]), 3);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1090 L_num = L_sub (L_temp, L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1091
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1092 /*** Check if pole frequency is less than 385 Hz ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1093
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1094 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1095 if (L_num <= 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1096 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1097 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1098 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1099 test (); move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1100 if (a[1] < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1101 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1102 temp = extract_h (L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1103 L_den = L_mult (temp, FREQTH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1104
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1105 L_temp = L_sub (L_num, L_den);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1106
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1107 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1108 if (L_temp < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1109 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1110 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1111 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1112 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1113 /*** Calculate normalised prediction error ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1114
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1115 prederr = 0x7fff; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1116
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1117 for (i = 0; i < 4; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1118 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1119 temp = mult (rc[i], rc[i]);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1120 temp = sub (0x7fff, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1121 prederr = mult (prederr, temp);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1122 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1123
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1124 /*** Test if prediction error is smaller than threshold ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1125
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1126 temp = sub (prederr, PREDTH);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1127
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1128 test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1129 if (temp < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1130 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1131 *tone = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1132 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1133 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1134 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1135
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1136 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1137 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1138 * FUNCTION: vad_decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1139 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1140 * PURPOSE: Computes the VAD decision based on the comparison of the
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1141 * floating point representations of pvad and thvad.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1142 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1143 * INPUTS: pvad filtered signal energy (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1144 * thvad decision threshold (mantissa+exponent)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1145 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1146 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1147 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1148 * RETURN VALUE: vad decision before hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1149 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1150 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1151
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1152 Word16 vad_decision (
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1153 Pfloat pvad,
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1154 Pfloat thvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1155 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1156 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1157 Word16 vvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1158
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1159 test (); test (); test ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1160 if (sub (pvad.e, thvad.e) > 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1161 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1162 vvad = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1163 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1164 else if ((sub (pvad.e, thvad.e) == 0) &&
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1165 (sub (pvad.m, thvad.m) > 0))
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1166 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1167 vvad = 1; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1168 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1169 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1170 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1171 vvad = 0; move16 ();
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1172 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1173
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1174 return vvad;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1175 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1176
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1177 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1178 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1179 * FUNCTION: vad_hangover
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1180 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1181 * PURPOSE: Computes the final VAD decision for the current frame
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1182 * being processed.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1183 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1184 * INPUTS: vvad vad decision before hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1185 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1186 * OUTPUTS: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1187 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1188 * RETURN VALUE: vad decision after hangover is added
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1189 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1190 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1191
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1192 Word16 vad_hangover (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1193 struct EFR_encoder_state *st,
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1194 Word16 vvad
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1195 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1196 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1197 struct vad_state *vst = &st->vad;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1198
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1199 if (sub (vvad, 1) == 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1200 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1201 vst->burstcount = add (vst->burstcount, 1);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1202 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1203 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1204 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1205 vst->burstcount = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1206 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1207
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1208 if (sub (vst->burstcount, BURSTCONST) >= 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1209 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1210 vst->hangcount = HANGCONST;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1211 vst->burstcount = BURSTCONST;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1212 }
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1213 if (vst->hangcount >= 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1214 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1215 vst->hangcount = sub (vst->hangcount, 1);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1216 return 1; /* vad = 1 */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1217 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1218 return vvad; /* vad = vvad */
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1219 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1220
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1221 /****************************************************************************
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1222 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1223 * FUNCTION: periodicity_update
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1224 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1225 * PURPOSE: Computes the ptch flag needed for the threshold
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1226 * adaptation decision for the next frame.
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1227 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1228 * INPUTS: lags[0..1] speech encoder long term predictor lags
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1229 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1230 * OUTPUTS: *ptch Boolean voiced / unvoiced decision
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1231 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1232 * RETURN VALUE: none
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1233 *
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1234 ***************************************************************************/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1235
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1236 void periodicity_update (
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1237 struct EFR_encoder_state *st,
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1238 Word16 lags[]
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1239 )
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1240 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1241 struct vad_state *vst = &st->vad;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1242 Word16 minlag, maxlag, lagcount, temp;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1243 Word16 i;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1244
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1245 /*** Run loop for the two halves in the frame ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1246
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1247 lagcount = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1248
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1249 for (i = 0; i <= 1; i++)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1250 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1251 /*** Search the maximum and minimum of consecutive lags ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1252
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1253 if (sub (vst->oldlag, lags[i]) > 0)
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1254 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1255 minlag = lags[i];
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1256 maxlag = vst->oldlag;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1257 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1258 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1259 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1260 minlag = vst->oldlag;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1261 maxlag = lags[i];
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1262 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1263
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1264 temp = sub (maxlag, minlag);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1265
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1266 if (sub (temp, LTHRESH) < 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1267 {
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1268 lagcount = add (lagcount, 1);
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1269 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1270 /*** Save the current LTP lag ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1271
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1272 vst->oldlag = lags[i];
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1273 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1274
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1275 /*** Update the veryoldlagcount and oldlagcount ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1276
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1277 vst->veryoldlagcount = vst->oldlagcount;
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1278 vst->oldlagcount = lagcount;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1279
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1280 /*** Make ptch decision ready for next frame ***/
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1281
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1282 temp = add (vst->oldlagcount, vst->veryoldlagcount);
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1283
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1284 if (sub (temp, NTHRESH) >= 0)
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1285 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1286 st->ptch = 1;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1287 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1288 else
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1289 {
111
756605c4850f libgsmefr: vad.c compiles
Mychaela Falconia <falcon@freecalypso.org>
parents: 110
diff changeset
1290 st->ptch = 0;
110
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1291 }
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1292
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1293 return;
913fe3c11890 libgsmefr/vad.c: initial import from ETSI code
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1294 }