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annotate libtwamr/c_g_aver.c @ 324:dc3b7caa59c4

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libtwamr: integrate c_g_aver.c
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 18 Apr 2024 20:05:14 +0000
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1 /*************************************************************************
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2 *
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3 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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4 * R99 Version 3.3.0
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5 * REL-4 Version 4.1.0
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6 *
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7 ********************************************************************************
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8 *
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9 * File : c_g_aver.c
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10 * Purpose :
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11 *
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12 ********************************************************************************
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13 */
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14
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15 /*
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16 ********************************************************************************
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17 * MODULE INCLUDE FILE AND VERSION ID
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18 ********************************************************************************
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19 */
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20 #include "namespace.h"
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21 #include "c_g_aver.h"
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22
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23 #include "tw_amr.h"
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24 #include "typedef.h"
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25 #include "basic_op.h"
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26 #include "no_count.h"
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27 #include "cnst.h"
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28 #include "memops.h"
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29
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30 /*
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31 ********************************************************************************
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32 * LOCAL VARIABLES AND TABLES
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33 ********************************************************************************
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34 */
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35 /*-----------------------------------------------------------------*
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36 * Decoder constant parameters (defined in "cnst.h") *
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37 *-----------------------------------------------------------------*
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38 * L_FRAME : Frame size. *
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39 * L_SUBFR : Sub-frame size. *
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40 *-----------------------------------------------------------------*/
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41
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42 /*
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43 ********************************************************************************
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44 * PUBLIC PROGRAM CODE
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45 ********************************************************************************
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46 */
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47 /*
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48 **************************************************************************
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49 *
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50 * Function : Cb_gain_average_reset
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51 * Purpose : Resets state memory
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52 *
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53 **************************************************************************
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54 */
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55 void Cb_gain_average_reset (Cb_gain_averageState *state)
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56 {
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57 /* Static vectors to zero */
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58 Set_zero (state->cbGainHistory, L_CBGAINHIST);
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59
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60 /* Initialize hangover handling */
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61 state->hangVar = 0;
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62 state->hangCount= 0;
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63 }
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64
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65 /*
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66 **************************************************************************
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67 *
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68 * Function : Cb_gain_average
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69 * Purpose :
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70 * Returns : The mix cb gains for MR475, MR515, MR59, MR67, MR102; gain_code other modes
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71 *
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72 **************************************************************************
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73 */
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74 Word16 Cb_gain_average (
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75 Cb_gain_averageState *st, /* i/o : State variables for CB gain avergeing */
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76 enum Mode mode, /* i : AMR mode */
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77 Word16 gain_code, /* i : CB gain Q1 */
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78 Word16 lsp[], /* i : The LSP for the current frame Q15 */
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79 Word16 lspAver[], /* i : The average of LSP for 8 frames Q15 */
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80 Word16 bfi, /* i : bad frame indication flag */
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81 Word16 prev_bf, /* i : previous bad frame indication flag */
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82 Word16 pdfi, /* i : potential degraded bad frame ind flag */
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83 Word16 prev_pdf, /* i : prev pot. degraded bad frame ind flag */
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84 Word16 inBackgroundNoise, /* i : background noise decision */
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85 Word16 voicedHangover /* i : # of frames after last voiced frame */
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86 )
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87 {
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88 /*---------------------------------------------------------*
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89 * Compute mixed cb gain, used to make cb gain more *
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90 * smooth in background noise for modes 5.15, 5.9 and 6.7 *
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91 * states that needs to be updated by all *
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92 *---------------------------------------------------------*/
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93 Word16 i;
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94 Word16 cbGainMix, diff, tmp_diff, bgMix, cbGainMean;
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95 Word32 L_sum;
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96 Word16 tmp[M], tmp1, tmp2, shift1, shift2, shift;
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97
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98 /* set correct cbGainMix for MR74, MR795, MR122 */
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99 cbGainMix = gain_code; move16 ();
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100
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101 /*-------------------------------------------------------*
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102 * Store list of CB gain needed in the CB gain *
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103 * averaging *
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104 *-------------------------------------------------------*/
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105 for (i = 0; i < (L_CBGAINHIST-1); i++)
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106 {
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107 st->cbGainHistory[i] = st->cbGainHistory[i+1]; move16 ();
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108 }
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109 st->cbGainHistory[L_CBGAINHIST-1] = gain_code; move16 ();
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110
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111 /* compute lsp difference */
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112 for (i = 0; i < M; i++) {
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113 tmp1 = abs_s(sub(lspAver[i], lsp[i])); /* Q15 */
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114 shift1 = sub(norm_s(tmp1), 1); /* Qn */
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115 tmp1 = shl(tmp1, shift1); /* Q15+Qn */
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116 shift2 = norm_s(lspAver[i]); /* Qm */
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117 tmp2 = shl(lspAver[i], shift2); /* Q15+Qm */
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118 tmp[i] = div_s(tmp1, tmp2); /* Q15+(Q15+Qn)-(Q15+Qm) */
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119 move16 ();
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120 shift = sub(add(2, shift1), shift2);
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121 test ();
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122 if (shift >= 0)
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123 {
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124 tmp[i] = shr(tmp[i], shift); move16 (); /* Q15+Qn-Qm-Qx=Q13 */
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125 }
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126 else
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127 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 tmp[i] = shl(tmp[i], negate(shift)); move16 (); /* Q15+Qn-Qm-Qx=Q13 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 diff = tmp[0]; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 for (i = 1; i < M; i++) {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 diff = add(diff, tmp[i]); /* Q13 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 /* Compute hangover */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 if (sub(diff, 5325) > 0) /* 0.65 in Q11 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 st->hangVar = add(st->hangVar, 1);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 st->hangVar = 0; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 if (sub(st->hangVar, 10) > 0)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 st->hangCount = 0; /* Speech period, reset hangover variable */ move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 /* Compute mix constant (bgMix) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 bgMix = 8192; /* 1 in Q13 */ move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if ((sub(mode, MR67) <= 0) || (sub(mode, MR102) == 0))
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 /* MR475, MR515, MR59, MR67, MR102 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 /* if errors and presumed noise make smoothing probability stronger */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 test (); test (); test (); test (); test (); test(); test (); test (); test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 if (((((pdfi != 0) && (prev_pdf != 0)) || (bfi != 0) || (prev_bf != 0)) &&
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 (sub(voicedHangover, 1) > 0) && (inBackgroundNoise != 0) &&
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 ((sub(mode, MR475) == 0) ||
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 (sub(mode, MR515) == 0) ||
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 (sub(mode, MR59) == 0)) ))
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 /* bgMix = min(0.25, max(0.0, diff-0.55)) / 0.25; */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 tmp_diff = sub(diff, 4506); /* 0.55 in Q13 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 /* max(0.0, diff-0.55) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 if (tmp_diff > 0)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 tmp1 = tmp_diff; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 tmp1 = 0; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 /* min(0.25, tmp1) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 if (sub(2048, tmp1) < 0)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 bgMix = 8192; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 bgMix = shl(tmp1, 2);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 /* bgMix = min(0.25, max(0.0, diff-0.40)) / 0.25; */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 tmp_diff = sub(diff, 3277); /* 0.4 in Q13 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 /* max(0.0, diff-0.40) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 if (tmp_diff > 0)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 tmp1 = tmp_diff; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 tmp1 = 0; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 /* min(0.25, tmp1) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 if (sub(2048, tmp1) < 0)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 bgMix = 8192; move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 else
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 bgMix = shl(tmp1, 2);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 test (); test ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 if ((sub(st->hangCount, 40) < 0) || (sub(diff, 5325) > 0)) /* 0.65 in Q13 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 bgMix = 8192; /* disable mix if too short time since */ move16 ();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 /* Smoothen the cb gain trajectory */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 /* smoothing depends on mix constant bgMix */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 L_sum = L_mult(6554, st->cbGainHistory[2]); /* 0.2 in Q15; L_sum in Q17 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 for (i = 3; i < L_CBGAINHIST; i++)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 L_sum = L_mac(L_sum, 6554, st->cbGainHistory[i]);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 cbGainMean = round(L_sum); /* Q1 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 /* more smoothing in error and bg noise (NB no DFI used here) */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 test (); test (); test (); test (); test(); test();
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 if (((bfi != 0) || (prev_bf != 0)) && (inBackgroundNoise != 0) &&
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 ((sub(mode, MR475) == 0) ||
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 (sub(mode, MR515) == 0) ||
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 (sub(mode, MR59) == 0)) )
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
243 L_sum = L_mult(4681, st->cbGainHistory[0]); /* 0.143 in Q15; L_sum in Q17 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 for (i = 1; i < L_CBGAINHIST; i++)
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 {
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 L_sum = L_mac(L_sum, 4681, st->cbGainHistory[i]);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
248 cbGainMean = round(L_sum); /* Q1 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 /* cbGainMix = bgMix*cbGainMix + (1-bgMix)*cbGainMean; */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 L_sum = L_mult(bgMix, cbGainMix); /* L_sum in Q15 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 L_sum = L_mac(L_sum, 8192, cbGainMean);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 L_sum = L_msu(L_sum, bgMix, cbGainMean);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 cbGainMix = round(L_shl(L_sum, 2)); /* Q1 */
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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256 }
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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257
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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258 st->hangCount = add(st->hangCount, 1);
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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259 return cbGainMix;
dc3b7caa59c4 libtwamr: integrate c_g_aver.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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260 }