FreeCalypso > hg > gsm-codec-lib

annotate libgsmhr1/vad.c @ 622:3ae5508f9a54 default tip

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libgsmhr1/sp_sfrm.c: constify "ROM" static data
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 05 Mar 2026 21:56:18 +0000
parents 5773e3907b86
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 * TITLE: Half-Rate GSM Voice Activity Detector (VAD) Modules
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 * REFERENCE: Recommendation GSM 06.42
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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10
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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11 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 | Include Files |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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16
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 #include "typedefs.h"
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5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
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18 #include "namespace.h"
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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19 #include "mathhalf.h"
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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20 #include "mathdp31.h"
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
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21 #include "enc_state.h"
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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22 #include "vad.h"
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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23
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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24
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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25 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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26 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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27 | Local Defines |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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28 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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29 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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30
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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31 /*** Floating point representations of constants pth, plev and margin ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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32
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
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33 #define M_PTH 26250
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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34 #define E_PTH 18
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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35 #define M_PLEV 17500
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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36 #define E_PLEV 20
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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37 #define M_MARGIN 27343
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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38 #define E_MARGIN 27
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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39
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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41 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 * FUNCTION: vad_algorithm
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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43 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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44 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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45 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 * PURPOSE: Returns a decision as to whether the current frame being
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 * processed by the speech encoder contains speech or not.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 * INPUTS: pL_acf[0..8] autocorrelation of input signal frame
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 * swScaleAcf L_acf scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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51 * pswRc[0..3] speech encoder reflection coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 * swPtch flag to indicate a periodic signal component
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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54 * OUTPUTS: pswVadFlag vad decision
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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55 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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56 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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57
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
58 void vad_algorithm(struct vad_state *vst, Longword pL_acf[9],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
59 Shortword swScaleAcf, Shortword pswRc[4],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
60 Shortword swPtch, Shortword *pswVadFlag)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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61 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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62
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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65 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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68
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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70 pL_av0[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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71 pL_av1[9];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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72
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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73 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 swM_acf0,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 swE_acf0,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 pswRav1[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 swNormRav1,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 swM_pvad,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 swE_pvad,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 swStat,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 swTone,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 swVvad;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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83
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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84
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
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88 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 energy_computation
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
92 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 pL_acf, swScaleAcf,
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
94 vst->pswRvad, vst->swNormRvad,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 &swM_pvad, &swE_pvad,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 &swM_acf0, &swE_acf0
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 average_acf
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
100 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 pL_acf, swScaleAcf,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 pL_av0, pL_av1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 predictor_values
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
106 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 pL_av1,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 pswRav1,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 &swNormRav1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 spectral_comparison
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
113 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 pswRav1, swNormRav1,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 pL_av0,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 &swStat
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 tone_detection
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
120 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 pswRc,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 &swTone
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 threshold_adaptation
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
126 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 swStat, swPtch, swTone,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 pswRav1, swNormRav1,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 swM_pvad, swE_pvad,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 swM_acf0, swE_acf0,
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
131 vst->pswRvad, &vst->swNormRvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
132 &vst->swM_thvad, &vst->swE_thvad
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 vad_decision
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
136 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 swM_pvad, swE_pvad,
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
138 vst->swM_thvad, vst->swE_thvad,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 &swVvad
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 vad_hangover
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
143 (vst,
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 swVvad,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 pswVadFlag
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 );
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 * FUNCTION: energy_computation
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 * PURPOSE: Computes the input and residual energies of the adaptive
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 * filter in a floating point representation.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 * INPUTS: pL_acf[0..8] autocorrelation of input signal frame
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 * swScaleAcf L_acf scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 * pswRvad[0..8] autocorrelated adaptive filter coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 * swNormRvad rvad scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 * OUTPUTS: pswM_pvad mantissa of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 * pswE_pvad exponent of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 * pswM_acf0 mantissa of signal frame energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 * pswE_acf0 exponent of signal frame energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
171 void energy_computation(struct vad_state *vst, Longword pL_acf[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
172 Shortword swScaleAcf, Shortword pswRvad[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
173 Shortword swNormRvad, Shortword *pswM_pvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
174 Shortword *pswE_pvad, Shortword *pswM_acf0,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
175 Shortword *pswE_acf0)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 L_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 pswSacf[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 swNormAcf,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 swNormProd,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 swShift;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 i;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 /*** Test if acf[0] is zero ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 if (pL_acf[0] == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 *pswE_pvad = -0x8000;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 *pswM_pvad = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 *pswE_acf0 = -0x8000;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 *pswM_acf0 = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 /*** Re-normalisation of L_acf[0..8] ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 swNormAcf = norm_l(pL_acf[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 swShift = sub(swNormAcf, 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 pswSacf[i] = extract_h(L_shl(pL_acf[i], swShift));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 /*** Computation of e_acf0 and m_acf0 ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 *pswE_acf0 = add(32, shl(swScaleAcf, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 *pswE_acf0 = sub(*pswE_acf0, swNormAcf);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 *pswM_acf0 = shl(pswSacf[0], 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 /*** Computation of e_pvad and m_pvad ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 *pswE_pvad = add(*pswE_acf0, 14);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 *pswE_pvad = sub(*pswE_pvad, swNormRvad);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 L_temp = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 for (i = 1; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 L_temp = L_mac(L_temp, pswSacf[i], pswRvad[i]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 L_temp = L_add(L_temp, L_shr(L_mult(pswSacf[0], pswRvad[0]), 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 if (L_temp <= 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 L_temp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 swNormProd = norm_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 *pswE_pvad = sub(*pswE_pvad, swNormProd);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 *pswM_pvad = extract_h(L_shl(L_temp, swNormProd));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 * FUNCTION: average_acf
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
256 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 * PURPOSE: Computes the arrays L_av0 [0..8] and L_av1 [0..8].
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
260 * INPUTS: pL_acf[0..8] autocorrelation of input signal frame
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 * swScaleAcf L_acf scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 * OUTPUTS: pL_av0[0..8] ACF averaged over last four frames
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 * pL_av1[0..8] ACF averaged over previous four frames
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
268 void average_acf(struct vad_state *vst, Longword pL_acf[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
269 Shortword swScaleAcf, Longword pL_av0[], Longword pL_av1[])
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 Longword L_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 Shortword swScale;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 int i;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 /*** computation of the scaleing factor ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 swScale = sub(10, shl(swScaleAcf, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 /*** Computation of the arrays L_av0 and L_av1 ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 L_temp = L_shr(pL_acf[i], swScale);
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
300 pL_av0[i] = L_add(vst->pL_sacf[i], L_temp);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
301 pL_av0[i] = L_add(vst->pL_sacf[i + 9], pL_av0[i]);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
302 pL_av0[i] = L_add(vst->pL_sacf[i + 18], pL_av0[i]);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
303 vst->pL_sacf[vst->swPt_sacf + i] = L_temp;
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
304 pL_av1[i] = vst->pL_sav0[vst->swPt_sav0 + i];
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
305 vst->pL_sav0[vst->swPt_sav0 + i] = pL_av0[i];
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
309 /*** Update the array pointers ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
310
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
311 if (vst->swPt_sacf == 18)
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
312 vst->swPt_sacf = 0;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
313 else
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
314 vst->swPt_sacf = add(vst->swPt_sacf, 9);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
315
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
316 if (vst->swPt_sav0 == 27)
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
317 vst->swPt_sav0 = 0;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
318 else
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
319 vst->swPt_sav0 = add(vst->swPt_sav0, 9);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
320
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
321 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
322
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
323 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
324 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
325 * FUNCTION: predictor_values
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
326 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
327 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
328 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
329 * PURPOSE: Computes the array rav [0..8] needed for the spectral
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
330 * comparison and the threshold adaptation.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
331 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
332 * INPUTS: pL_av1 [0..8] ACF averaged over previous four frames
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
333 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
334 * OUTPUTS: pswRav1 [0..8] ACF obtained from L_av1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
335 * pswNormRav1 r_av1 scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
336 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
337 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
338
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
339 void predictor_values(struct vad_state *vst, Longword pL_av1[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
340 Shortword pswRav1[], Shortword *pswNormRav1)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
341 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
342
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
343 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
344 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
345 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
346 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
347 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
348
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
349 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
350 pswVpar[8],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
351 pswAav1[9];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
352
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
353 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
354 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
355 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
356 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
357 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
358
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
359 schur_recursion(vst, pL_av1, pswVpar);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
360 step_up(vst, 8, pswVpar, pswAav1);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
361 compute_rav1(vst, pswAav1, pswRav1, pswNormRav1);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
362
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
363 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
364
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
365 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
366 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
367 * FUNCTION: schur_recursion
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
368 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
369 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
370 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
371 * PURPOSE: Uses the Schur recursion to compute adaptive filter
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
372 * reflection coefficients from an autorrelation function.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
373 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
374 * INPUTS: pL_av1[0..8] autocorrelation function
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
375 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
376 * OUTPUTS: pswVpar[0..7] reflection coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
377 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
378 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
379
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
380 void schur_recursion(struct vad_state *vst, Longword pL_av1[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
381 Shortword pswVpar[])
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
382 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
383
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
384 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
385 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
386 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
387 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
388 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
389
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
390 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
391 pswAcf[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
392 pswPp[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
393 pswKk[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
394 swTemp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
395
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
396 int i,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
397 k,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
398 m,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
399 n;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
400
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
401
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
402 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
403 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
404 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
405 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
406 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
407
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
408 /*** Schur recursion with 16-bit arithmetic ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
409
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
410 if (pL_av1[0] == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
411 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
412 for (i = 0; i < 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
413 pswVpar[i] = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
414 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
415 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
416
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
417 swTemp = norm_l(pL_av1[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
418
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
419 for (k = 0; k <= 8; k++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
420 pswAcf[k] = extract_h(L_shl(pL_av1[k], swTemp));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
421
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
422
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
423 /*** Initialise array pp[..] and kk[..] for the recursion: ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
424
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
425 for (i = 1; i <= 7; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
426 pswKk[9 - i] = pswAcf[i];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
427
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
428 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
429 pswPp[i] = pswAcf[i];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
430
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
431
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
432 /*** Compute Parcor coefficients: ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
433
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
434 for (n = 0; n < 8; n++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
435 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
436 if (pswPp[0] < abs_s(pswPp[1]))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
437 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
438 for (i = n; i < 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
439 pswVpar[i] = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
440 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
441 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
442 pswVpar[n] = divide_s(abs_s(pswPp[1]), pswPp[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
443
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
444 if (pswPp[1] > 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
445 pswVpar[n] = negate(pswVpar[n]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
446 if (n == 7)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
447 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
448
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
449
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
450 /*** Schur recursion: ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
451
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
452 pswPp[0] = add(pswPp[0], mult_r(pswPp[1], pswVpar[n]));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
453
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
454 for (m = 1; m <= (7 - n); m++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
455 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
456 pswPp[m] = add(pswPp[1 + m], mult_r(pswKk[9 - m], pswVpar[n]));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
457 pswKk[9 - m] = add(pswKk[9 - m], mult_r(pswPp[1 + m], pswVpar[n]));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
458 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
459 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
460
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
461 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
462
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
463 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
464 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
465 * FUNCTION: step_up
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
466 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
467 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
468 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
469 * PURPOSE: Computes the transversal filter coefficients from the
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
470 * reflection coefficients.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
471 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
472 * INPUTS: swNp filter order (2..8)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
473 * pswVpar[0..np-1] reflection coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
474 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
475 * OUTPUTS: pswAav1[0..np] transversal filter coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
476 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
477 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
478
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
479 void step_up(struct vad_state *vst, Shortword swNp, Shortword pswVpar[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
480 Shortword pswAav1[])
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
481 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
482
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
483 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
484 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
485 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
486 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
487 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
488
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
489 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
490 pL_coef[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
491 pL_work[9];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
492
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
493 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
494 swTemp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
495
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
496 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
497 i,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
498 m;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
499
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
500
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
501 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
502 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
503 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
504 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
505 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
506
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
507 /*** Initialisation of the step-up recursion ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
508
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
509 pL_coef[0] = L_shl(0x4000L, 15);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
510 pL_coef[1] = L_shl(L_deposit_l(pswVpar[0]), 14);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
511
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
512
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
513 /*** Loop on the LPC analysis order: ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
514
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
515 for (m = 2; m <= swNp; m++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
516 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
517 for (i = 1; i < m; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
518 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
519 swTemp = extract_h(pL_coef[m - i]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
520 pL_work[i] = L_mac(pL_coef[i], pswVpar[m - 1], swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
521 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
522 for (i = 1; i < m; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
523 pL_coef[i] = pL_work[i];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
524 pL_coef[m] = L_shl(L_deposit_l(pswVpar[m - 1]), 14);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
525 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
526
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
527
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
528 /*** Keep the aav1[0..swNp] in 15 bits for the following subclause ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
529
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
530 for (i = 0; i <= swNp; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
531 pswAav1[i] = extract_h(L_shr(pL_coef[i], 3));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
532
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
533 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
534
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
535 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
536 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
537 * FUNCTION: compute_rav1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
538 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
539 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
540 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
541 * PURPOSE: Computes the autocorrelation function of the adaptive
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
542 * filter coefficients.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
543 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
544 * INPUTS: pswAav1[0..8] adaptive filter coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
545 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
546 * OUTPUTS: pswRav1[0..8] ACF of aav1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
547 * pswNormRav1 r_av1 scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
548 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
549 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
550
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
551 void compute_rav1(struct vad_state *vst, Shortword pswAav1[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
552 Shortword pswRav1[], Shortword *pswNormRav1)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
553 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
554
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
555 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
556 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
557 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
558 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
559 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
560
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
561 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
562 pL_work[9];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
563
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
564 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
565 i,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
566 k;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
567
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
568
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
569 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
570 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
571 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
572 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
573 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
574
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
575 /*** Computation of the rav1[0..8] ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
576
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
577 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
578 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
579 pL_work[i] = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
580
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
581 for (k = 0; k <= 8 - i; k++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
582 pL_work[i] = L_mac(pL_work[i], pswAav1[k], pswAav1[k + i]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
583 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
584
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
585 if (pL_work[0] == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
586 *pswNormRav1 = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
587 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
588 *pswNormRav1 = norm_l(pL_work[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
589
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
590 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
591 pswRav1[i] = extract_h(L_shl(pL_work[i], *pswNormRav1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
592
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
593 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
594
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
595 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
596 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
597 * FUNCTION: spectral_comparison
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
598 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
599 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
600 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
601 * PURPOSE: Computes the stat flag needed for the threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
602 * adaptation decision.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
603 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
604 * INPUTS: pswRav1[0..8] ACF obtained from L_av1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
605 * swNormRav1 rav1 scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
606 * pL_av0[0..8] ACF averaged over last four frames
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
607 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
608 * OUTPUTS: pswStat flag to indicate spectral stationarity
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
609 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
610 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
611
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
612 void spectral_comparison(struct vad_state *vst, Shortword pswRav1[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
613 Shortword swNormRav1, Longword pL_av0[],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
614 Shortword *pswStat)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
615 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
616
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
617 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
618 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
619 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
620 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
621 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
622
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
623 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
624 L_dm,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
625 L_sump,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
626 L_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
627
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
628 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
629 pswSav0[9],
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
630 swShift,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
631 swDivShift,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
632 swTemp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
633
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
634 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
635 i;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
636
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
637
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
638 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
639 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
640 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
641 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
642 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
643
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
644 /*** Re-normalise L_av0[0..8] ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
645
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
646 if (pL_av0[0] == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
647 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
648 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
649 pswSav0[i] = 4095;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
650 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
651 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
652 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
653 swShift = sub(norm_l(pL_av0[0]), 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
654 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
655 pswSav0[i] = extract_h(L_shl(pL_av0[i], swShift));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
656 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
657
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
658 /*** compute partial sum of dm ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
659
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
660 L_sump = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
661
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
662 for (i = 1; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
663 L_sump = L_mac(L_sump, pswRav1[i], pswSav0[i]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
664
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
665 /*** compute the division of the partial sum by sav0[0] ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
666
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
667 if (L_sump < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
668 L_temp = L_negate(L_sump);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
669 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
670 L_temp = L_sump;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
671
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
672 if (L_temp == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
673 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
674 L_dm = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
675 swShift = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
676 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
677 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
678 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
679 pswSav0[0] = shl(pswSav0[0], 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
680 swShift = norm_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
681 swTemp = extract_h(L_shl(L_temp, swShift));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
682
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
683 if (pswSav0[0] >= swTemp)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
684 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
685 swDivShift = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
686 swTemp = divide_s(swTemp, pswSav0[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
687 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
688 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
689 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
690 swDivShift = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
691 swTemp = sub(swTemp, pswSav0[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
692 swTemp = divide_s(swTemp, pswSav0[0]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
693 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
694
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
695 if (swDivShift == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
696 L_dm = 0x8000L;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
697 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
698 L_dm = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
699
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
700 L_dm = L_shl((L_add(L_dm, L_deposit_l(swTemp))), 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
701
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
702 if (L_sump < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
703 L_dm = L_sub(0L, L_dm);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
704 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
705
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
706
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
707 /*** Re-normalisation and final computation of L_dm ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
708
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
709 L_dm = L_shl(L_dm, 14);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
710 L_dm = L_shr(L_dm, swShift);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
711 L_dm = L_add(L_dm, L_shl(L_deposit_l(pswRav1[0]), 11));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
712 L_dm = L_shr(L_dm, swNormRav1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
713
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
714
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
715 /*** Compute the difference and save L_dm ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
716
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
717 L_temp = L_sub(L_dm, vst->L_lastdm);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
718 vst->L_lastdm = L_dm;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
719
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
720 if (L_temp < 0L)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
721 L_temp = L_negate(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
722
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
723
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
724 /*** Evaluation of the state flag ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
725
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
726 L_temp = L_sub(L_temp, 4456L);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
727
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
728 if (L_temp < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
729 *pswStat = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
730 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
731 *pswStat = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
732
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
733 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
734
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
735 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
736 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
737 * FUNCTION: tone_detection
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
738 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
739 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
740 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
741 * PURPOSE: Computes the tone flag needed for the threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
742 * adaptation decision.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
743 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
744 * INPUTS: pswRc[0..3] reflection coefficients calculated in the
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
745 * speech encoder short term predictor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
746 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
747 * OUTPUTS: pswTone flag to indicate a periodic signal component
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
748 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
749 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
750
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
751 void tone_detection(struct vad_state *vst, Shortword pswRc[4],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
752 Shortword *pswTone)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
753 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
754
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
755 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
756 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
757 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
758 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
759 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
760
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
761 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
762 L_num,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
763 L_den,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
764 L_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
765
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
766 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
767 swTemp,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
768 swPredErr,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
769 pswA[3];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
770
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
771 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
772 i;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
773
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
774 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
775 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
776 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
777 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
778 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
779
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
780 *pswTone = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
781
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
782
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
783 /*** Calculate filter coefficients ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
784
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
785 step_up(vst, 2, pswRc, pswA);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
786
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
787
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
788 /*** Calculate ( a[1] * a[1] ) ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
789
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
790 swTemp = shl(pswA[1], 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
791 L_den = L_mult(swTemp, swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
792
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
793
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
794 /*** Calculate ( 4*a[2] - a[1]*a[1] ) ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
795
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
796 L_temp = L_shl(L_deposit_h(pswA[2]), 3);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
797 L_num = L_sub(L_temp, L_den);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
798
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
799
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
800 /*** Check if pole frequency is less than 385 Hz ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
801
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
802 if (L_num <= 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
803 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
804
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
805 if (pswA[1] < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
806 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
807 swTemp = extract_h(L_den);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
808 L_temp = L_msu(L_num, swTemp, 3189);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
809
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
810 if (L_temp < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
811 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
812 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
813
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
814
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
815 /*** Calculate normalised prediction error ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
816
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
817 swPredErr = 0x7fff;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
818
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
819 for (i = 0; i < 4; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
820 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
821 swTemp = mult(pswRc[i], pswRc[i]);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
822 swTemp = sub(32767, swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
823 swPredErr = mult(swPredErr, swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
824 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
825
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
826
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
827 /*** Test if prediction error is smaller than threshold ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
828
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
829 swTemp = sub(swPredErr, 1464);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
830
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
831 if (swTemp < 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
832 *pswTone = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
833
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
834 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
835
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
836 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
837 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
838 * FUNCTION: threshold_adaptation
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
839 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
840 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
841 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
842 * PURPOSE: Evaluates the secondary VAD decision. If speech is not
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
843 * present then the noise model rvad and adaptive threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
844 * thvad are updated.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
845 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
846 * INPUTS: swStat flag to indicate spectral stationarity
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
847 * swPtch flag to indicate a periodic signal component
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
848 * swTone flag to indicate a tone signal component
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
849 * pswRav1[0..8] ACF obtained from l_av1
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
850 * swNormRav1 r_av1 scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
851 * swM_pvad mantissa of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
852 * swE_pvad exponent of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
853 * swM_acf0 mantissa of signal frame energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
854 * swE_acf0 exponent of signal frame energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
855 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
856 * OUTPUTS: pswRvad[0..8] autocorrelated adaptive filter coefficients
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
857 * pswNormRvad rvad scaling factor
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
858 * pswM_thvad mantissa of decision threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
859 * pswE_thvad exponent of decision threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
860 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
861 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
862
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
863 void threshold_adaptation(struct vad_state *vst, Shortword swStat,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
864 Shortword swPtch, Shortword swTone,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
865 Shortword pswRav1[], Shortword swNormRav1,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
866 Shortword swM_pvad, Shortword swE_pvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
867 Shortword swM_acf0, Shortword swE_acf0,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
868 Shortword pswRvad[], Shortword *pswNormRvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
869 Shortword *pswM_thvad, Shortword *pswE_thvad)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
870 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
871
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
872 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
873 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
874 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
875 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
876 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
877
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
878 Longword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
879 L_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
880
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
881 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
882 swTemp,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
883 swComp,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
884 swComp2,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
885 swM_temp,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
886 swE_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
887
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
888 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
889 i;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
890
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
891
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
892 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
893 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
894 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
895 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
896 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
897
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
898 swComp = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
899
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
900 /*** Test if acf0 < pth; if yes set thvad to plev ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
901
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
902 if (swE_acf0 < E_PTH)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
903 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
904 if ((swE_acf0 == E_PTH) && (swM_acf0 < M_PTH))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
905 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
906
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
907 if (swComp == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
908 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
909 *pswE_thvad = E_PLEV;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
910 *pswM_thvad = M_PLEV;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
911
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
912 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
913 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
914
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
915
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
916 /*** Test if an adaption is required ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
917
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
918 if (swPtch == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
919 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
920 if (swStat == 0)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
921 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
922 if (swTone == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
923 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
924
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
925 if (swComp == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
926 {
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
927 vst->swAdaptCount = 0;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
928 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
929 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
930
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
931
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
932 /*** Increment adaptcount ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
933
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
934 vst->swAdaptCount = add(vst->swAdaptCount, 1);
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
935 if (vst->swAdaptCount <= 8)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
936 return;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
937
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
938
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
939 /*** computation of thvad-(thvad/dec) ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
940
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
941 *pswM_thvad = sub(*pswM_thvad, shr(*pswM_thvad, 5));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
942
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
943 if (*pswM_thvad < 0x4000)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
944 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
945 *pswM_thvad = shl(*pswM_thvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
946 *pswE_thvad = sub(*pswE_thvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
947 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
948
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
949
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
950 /*** computation of pvad*fac ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
951
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
952 L_temp = L_mult(swM_pvad, 20889);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
953 L_temp = L_shr(L_temp, 15);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
954 swE_temp = add(swE_pvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
955
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
956 if (L_temp > 0x7fffL)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
957 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
958 L_temp = L_shr(L_temp, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
959 swE_temp = add(swE_temp, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
960 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
961 swM_temp = extract_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
962
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
963
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
964 /*** test if thvad < pavd*fac ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
965
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
966 if (*pswE_thvad < swE_temp)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
967 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
968
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
969 if ((*pswE_thvad == swE_temp) && (*pswM_thvad < swM_temp))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
970 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
971
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
972
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
973 /*** compute minimum(thvad+(thvad/inc), pvad*fac) when comp = 1 ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
974
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
975 if (swComp == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
976 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
977
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
978 /*** compute thvad + (thvad/inc) ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
979
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
980 L_temp = L_add(L_deposit_l(*pswM_thvad),L_deposit_l(shr(*pswM_thvad, 4)));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
981
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
982 if (L_temp > 0x7fffL)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
983 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
984 *pswM_thvad = extract_l(L_shr(L_temp, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
985 *pswE_thvad = add(*pswE_thvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
986 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
987 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
988 *pswM_thvad = extract_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
989
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
990 swComp2 = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
991
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
992 if (swE_temp < *pswE_thvad)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
993 swComp2 = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
994
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
995 if ((swE_temp == *pswE_thvad) && (swM_temp < *pswM_thvad))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
996 swComp2 = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
997
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
998 if (swComp2 == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
999 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1000 *pswE_thvad = swE_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1001 *pswM_thvad = swM_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1002 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1003 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1004
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1005
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1006 /*** compute pvad + margin ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1007
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1008 if (swE_pvad == E_MARGIN)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1009 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1010 L_temp = L_add(L_deposit_l(swM_pvad), L_deposit_l(M_MARGIN));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1011 swM_temp = extract_l(L_shr(L_temp, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1012 swE_temp = add(swE_pvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1013 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1014 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1015 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1016 if (swE_pvad > E_MARGIN)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1017 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1018 swTemp = sub(swE_pvad, E_MARGIN);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1019 swTemp = shr(M_MARGIN, swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1020 L_temp = L_add(L_deposit_l(swM_pvad), L_deposit_l(swTemp));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1021
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1022 if (L_temp > 0x7fffL)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1023 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1024 swE_temp = add(swE_pvad, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1025 swM_temp = extract_l(L_shr(L_temp, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1026 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1027 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1028 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1029 swE_temp = swE_pvad;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1030 swM_temp = extract_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1031 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1032 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1033 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1034 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1035 swTemp = sub(E_MARGIN, swE_pvad);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1036 swTemp = shr(swM_pvad, swTemp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1037 L_temp = L_add(L_deposit_l(M_MARGIN), L_deposit_l(swTemp));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1038
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1039 if (L_temp > 0x7fffL)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1040 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1041 swE_temp = add(E_MARGIN, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1042 swM_temp = extract_l(L_shr(L_temp, 1));
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1043 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1044 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1045 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1046 swE_temp = E_MARGIN;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1047 swM_temp = extract_l(L_temp);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1048 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1049 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1050 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1051
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1052 /*** Test if thvad > pvad + margin ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1053
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1054 swComp = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1055
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1056 if (*pswE_thvad > swE_temp)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1057 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1058
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1059 if ((*pswE_thvad == swE_temp) && (*pswM_thvad > swM_temp))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1060 swComp = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1061
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1062 if (swComp == 1)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1063 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1064 *pswE_thvad = swE_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1065 *pswM_thvad = swM_temp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1066 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1067
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1068 /*** Normalise and retain rvad[0..8] in memory ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1069
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1070 *pswNormRvad = swNormRav1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1071
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1072 for (i = 0; i <= 8; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1073 pswRvad[i] = pswRav1[i];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1074
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1075 /*** Set adaptcount to adp + 1 ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1076
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1077 vst->swAdaptCount = 9;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1078
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1079 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1080
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1081 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1082 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1083 * FUNCTION: vad_decision
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1084 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1085 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1086 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1087 * PURPOSE: Computes the VAD decision based on the comparison of the
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1088 * floating point representations of pvad and thvad.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1089 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1090 * INPUTS: swM_pvad mantissa of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1091 * swE_pvad exponent of filtered signal energy
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1092 * swM_thvad mantissa of decision threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1093 * swE_thvad exponent of decision threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1094 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1095 * OUTPUTS: pswVvad vad decision before hangover is added
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1096 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1097 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1098
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1099 void vad_decision(struct vad_state *vst, Shortword swM_pvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1100 Shortword swE_pvad, Shortword swM_thvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1101 Shortword swE_thvad, Shortword *pswVvad)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1102 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1103
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1104 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1105 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1106 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1107 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1108 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1109
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1110 *pswVvad = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1111
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1112 if (swE_pvad > swE_thvad)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1113 *pswVvad = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1114 if ((swE_pvad == swE_thvad) && (swM_pvad > swM_thvad))
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1115 *pswVvad = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1116
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1117 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1118
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1119 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1120 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1121 * FUNCTION: vad_hangover
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1122 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1123 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1124 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1125 * PURPOSE: Computes the final VAD decision for the current frame
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1126 * being processed.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1127 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1128 * INPUTS: swVvad vad decision before hangover is added
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1129 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1130 * OUTPUTS: pswVadFlag vad decision after hangover is added
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1131 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1132 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1133
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1134 void vad_hangover(struct vad_state *vst, Shortword swVvad,
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1135 Shortword *pswVadFlag)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1136 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1137
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1138 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1139 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1140 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1141 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1142 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1143
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1144 if (swVvad == 1)
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1145 vst->swBurstCount = add(vst->swBurstCount, 1);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1146 else
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1147 vst->swBurstCount = 0;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1148
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1149 if (vst->swBurstCount >= 3)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1150 {
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1151 vst->swHangCount = 5;
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1152 vst->swBurstCount = 3;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1153 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1154
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1155 *pswVadFlag = swVvad;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1156
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1157 if (vst->swHangCount >= 0)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1158 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1159 *pswVadFlag = 1;
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1160 vst->swHangCount = sub(vst->swHangCount, 1);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1161 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1162
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1163 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1164
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1165 /****************************************************************************
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1166 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1167 * FUNCTION: periodicity_update
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1168 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1169 * VERSION: 1.2
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1170 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1171 * PURPOSE: Computes the ptch flag needed for the threshold
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1172 * adaptation decision for the next frame.
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1173 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1174 * INPUTS: pswLags[0..3] speech encoder long term predictor lags
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1175 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1176 * OUTPUTS: pswPtch Boolean voiced / unvoiced decision
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1177 *
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1178 ***************************************************************************/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1179
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1180 void periodicity_update(struct vad_state *vst, Shortword pswLags[4],
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1181 Shortword *pswPtch)
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1182 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1183
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1184 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1185 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1186 | Automatic Variables |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1187 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1188 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1189
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1190 Shortword
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1191 swMinLag,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1192 swMaxLag,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1193 swSmallLag,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1194 swLagCount,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1195 swTemp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1196
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1197 int
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1198 i,
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1199 j;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1200
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1201 /*_________________________________________________________________________
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1202 | |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1203 | Executable Code |
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1204 |_________________________________________________________________________|
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1205 */
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1206
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1207 /*** Run loop for No. of sub-segments in the frame ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1208
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1209 swLagCount = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1210
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1211 for (i = 0; i <= 3; i++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1212 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1213 /*** Search the maximum and minimum of consecutive lags ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1214
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1215 if (vst->swOldLag > pswLags[i])
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1216 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1217 swMinLag = pswLags[i];
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1218 swMaxLag = vst->swOldLag;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1219 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1220 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1221 {
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1222 swMinLag = vst->swOldLag;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1223 swMaxLag = pswLags[i];
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1224 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1225
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1226
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1227 /*** Compute smallag (modulo operation not defined) ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1228
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1229 swSmallLag = swMaxLag;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1230
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1231 for (j = 0; j <= 2; j++)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1232 {
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1233 if (swSmallLag >= swMinLag)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1234 swSmallLag = sub(swSmallLag, swMinLag);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1235 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1236
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1237
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1238 /*** Minimum of smallag and minlag - smallag ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1239
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1240 swTemp = sub(swMinLag, swSmallLag);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1241
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1242 if (swTemp < swSmallLag)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1243 swSmallLag = swTemp;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1244
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1245 if (swSmallLag < 2)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1246 swLagCount = add(swLagCount, 1);
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1247
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1248
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1249 /*** Save the current LTP lag ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1250
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1251 vst->swOldLag = pswLags[i];
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1252 }
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1253
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1254
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1255 /*** Update the veryoldlagcount and oldlagcount ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1256
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1257 vst->swVeryOldLagCount = vst->swOldLagCount;
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1258 vst->swOldLagCount = swLagCount;
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1259
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1260
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1261 /*** Make ptch decision ready for next frame ***/
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1262
615
5773e3907b86 libgsmhr1: integrate vad.c
Mychaela Falconia <falcon@freecalypso.org>
parents: 614
diff changeset
1263 swTemp = add(vst->swOldLagCount, vst->swVeryOldLagCount);
614
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1264
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1265 if (swTemp >= 7)
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1266 *pswPtch = 1;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1267 else
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1268 *pswPtch = 0;
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1269
cf74197b9d4f libgsmhr1/vad.[ch]: import original
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1270 }