FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/dtx_enc.c @ 485:751f06541fbb

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doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:47:22 +0000
parents 5a1d18542f8a
children
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5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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1 /*
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2 ********************************************************************************
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3 *
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
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5 * R99 Version 3.3.0
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6 * REL-4 Version 4.1.0
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7 *
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8 ********************************************************************************
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9 *
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10 * File : dtx_enc.c
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11 * Purpose : DTX mode computation of SID parameters
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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 ********************************************************************************
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18 * MODULE INCLUDE FILE AND VERSION ID
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19 ********************************************************************************
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20 */
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21 #include "namespace.h"
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22 #include "dtx_enc.h"
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23
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24 /*
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25 ********************************************************************************
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26 * INCLUDE FILES
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27 ********************************************************************************
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28 */
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29 #include "tw_amr.h"
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30 #include "typedef.h"
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31 #include "basic_op.h"
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32 #include "oper_32b.h"
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33 #include "q_plsf.h"
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34 #include "memops.h"
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35 #include "log2.h"
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36 #include "lsp_lsf.h"
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37 #include "reorder.h"
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38 #include "no_count.h"
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39 #include "lsp_tab.h"
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40
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41 /*
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42 ********************************************************************************
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43 * PUBLIC PROGRAM CODE
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44 ********************************************************************************
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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 : dtx_enc_reset
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51 *
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52 **************************************************************************
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53 */
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54 void dtx_enc_reset (dtx_encState *st)
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55 {
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56 Word16 i;
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57
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58 st->hist_ptr = 0;
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59 st->log_en_index = 0;
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60 st->init_lsf_vq_index = 0;
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61 st->lsp_index[0] = 0;
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62 st->lsp_index[1] = 0;
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63 st->lsp_index[2] = 0;
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64
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65 /* Init lsp_hist[] */
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66 for(i = 0; i < DTX_HIST_SIZE; i++)
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67 {
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68 Copy(lsp_init_data, &st->lsp_hist[i * M], M);
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69 }
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70
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71 /* Reset energy history */
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72 Set_zero(st->log_en_hist, M);
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73
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74 st->dtxHangoverCount = DTX_HANG_CONST;
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75 st->decAnaElapsedCount = 32767;
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76 }
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77
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78 /*
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79 **************************************************************************
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80 *
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81 * Function : dtx_enc
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82 *
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83 **************************************************************************
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84 */
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85 int dtx_enc(dtx_encState *st, /* i/o : State struct */
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86 Word16 computeSidFlag, /* i : compute SID */
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87 Q_plsfState *qSt, /* i/o : Qunatizer state struct */
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88 gc_predState* predState, /* i/o : State struct */
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89 Word16 **anap /* o : analysis parameters */
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90 )
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91 {
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92 Word16 i,j;
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93 Word16 log_en;
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94 Word16 lsf[M];
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95 Word16 lsp[M];
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96 Word16 lsp_q[M];
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97 Word32 L_lsp[M];
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98
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99 /* VOX mode computation of SID parameters */
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100 test (); test ();
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101 if ((computeSidFlag != 0))
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102 {
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103 /* compute new SID frame if safe i.e don't
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104 * compute immediately after a talk spurt */
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105 log_en = 0; move16 ();
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106 for (i = 0; i < M; i++)
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107 {
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108 L_lsp[i] = 0; move16 ();
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109 }
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110
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111 /* average energy and lsp */
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112 for (i = 0; i < DTX_HIST_SIZE; i++)
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113 {
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114 log_en = add(log_en,
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115 shr(st->log_en_hist[i],2));
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116
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117 for (j = 0; j < M; j++)
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118 {
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119 L_lsp[j] = L_add(L_lsp[j],
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 L_deposit_l(st->lsp_hist[i * M + j]));
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 log_en = shr(log_en, 1);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 for (j = 0; j < M; j++)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 lsp[j] = extract_l(L_shr(L_lsp[j], 3)); /* divide by 8 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 /* quantize logarithmic energy to 6 bits */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 st->log_en_index = add(log_en, 2560); /* +2.5 in Q10 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 st->log_en_index = add(st->log_en_index, 128); /* add 0.5/4 in Q10 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 st->log_en_index = shr(st->log_en_index, 8);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (sub(st->log_en_index, 63) > 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 st->log_en_index = 63; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (st->log_en_index < 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 st->log_en_index = 0; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* update gain predictor memory */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 log_en = shl(st->log_en_index, -2+10); /* Q11 and divide by 4 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 log_en = sub(log_en, 2560); /* add 2.5 in Q11 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 log_en = sub(log_en, 9000);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 if (log_en > 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 log_en = 0; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if (sub(log_en, -14436) < 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 log_en = -14436; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 /* past_qua_en for other modes than MR122 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 predState->past_qua_en[0] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 predState->past_qua_en[1] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 predState->past_qua_en[2] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 predState->past_qua_en[3] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 /* scale down by factor 20*log10(2) in Q15 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 log_en = mult(5443, log_en);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 /* past_qua_en for mode MR122 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 predState->past_qua_en_MR122[0] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 predState->past_qua_en_MR122[1] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 predState->past_qua_en_MR122[2] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 predState->past_qua_en_MR122[3] = log_en; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 /* make sure that LSP's are ordered */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 Lsp_lsf(lsp, lsf, M);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 Reorder_lsf(lsf, LSF_GAP, M);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 Lsf_lsp(lsf, lsp, M);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 /* Quantize lsp and put on parameter list */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 Q_plsf_3(qSt, MRDTX, lsp, lsp_q, st->lsp_index,
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 &st->init_lsf_vq_index);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 *(*anap)++ = st->init_lsf_vq_index; /* 3 bits */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 *(*anap)++ = st->lsp_index[0]; /* 8 bits */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 *(*anap)++ = st->lsp_index[1]; /* 9 bits */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 *(*anap)++ = st->lsp_index[2]; /* 9 bits */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 *(*anap)++ = st->log_en_index; /* 6 bits */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 /* = 35 bits */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 return 0;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 /*
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 **************************************************************************
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 *
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 * Function : dtx_buffer
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 * Purpose : handles the DTX buffer
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 *
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 **************************************************************************
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 int dtx_buffer(dtx_encState *st, /* i/o : State struct */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 Word16 lsp_new[], /* i : LSP vector */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 Word16 speech[] /* i : speech samples */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 )
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 Word16 i;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 Word32 L_frame_en;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 Word16 log_en_e;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 Word16 log_en_m;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 Word16 log_en;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 /* update pointer to circular buffer */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 st->hist_ptr = add(st->hist_ptr, 1);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 if (sub(st->hist_ptr, DTX_HIST_SIZE) == 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 st->hist_ptr = 0; move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 /* copy lsp vector into buffer */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 Copy(lsp_new, &st->lsp_hist[st->hist_ptr * M], M);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 /* compute log energy based on frame energy */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 L_frame_en = 0; /* Q0 */ move32 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 for (i=0; i < L_FRAME; i++)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 L_frame_en = L_mac(L_frame_en, speech[i], speech[i]);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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parents:
diff changeset
236 Log2(L_frame_en, &log_en_e, &log_en_m);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 /* convert exponent and mantissa to Word16 Q10 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
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239 log_en = shl(log_en_e, 10); /* Q10 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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parents:
diff changeset
240 log_en = add(log_en, shr(log_en_m, 15-10));
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parents:
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241
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 /* divide with L_FRAME i.e subtract with log2(L_FRAME) = 7.32193 */
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parents:
diff changeset
243 log_en = sub(log_en, 8521);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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parents:
diff changeset
244
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 /* insert into log energy buffer with division by 2 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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parents:
diff changeset
246 log_en = shr(log_en, 1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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247 st->log_en_hist[st->hist_ptr] = log_en; /* Q10 */ move16 ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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248
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
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249 return 0;
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parents:
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250 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 /*
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
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253 **************************************************************************
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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254 *
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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255 * Function : tx_dtx_handler
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parents:
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256 * Purpose : adds extra speech hangover to analyze speech on the decoding side.
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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257 *
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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258 **************************************************************************
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
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259 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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260 Word16 tx_dtx_handler(dtx_encState *st, /* i/o : State struct */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 Word16 vad_flag, /* i : vad decision */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 enum Mode *usedMode /* i/o : mode changed or not */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 )
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 Word16 compute_new_sid_possible;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
267 /* this state machine is in synch with the GSMEFR txDtx machine */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
268 st->decAnaElapsedCount = add(st->decAnaElapsedCount, 1);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
269
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
270 compute_new_sid_possible = 0; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
271
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
272 test();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
273 if (vad_flag != 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
274 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
275 st->dtxHangoverCount = DTX_HANG_CONST; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
276 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
277 else
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
278 { /* non-speech */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
279 test();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
280 if (st->dtxHangoverCount == 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
281 { /* out of decoder analysis hangover */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
282 st->decAnaElapsedCount = 0; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
283 *usedMode = MRDTX; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
284 compute_new_sid_possible = 1; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
285 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
286 else
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
287 { /* in possible analysis hangover */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
288 st->dtxHangoverCount = sub(st->dtxHangoverCount, 1);
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
289
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
290 /* decAnaElapsedCount + dtxHangoverCount < DTX_ELAPSED_FRAMES_THRESH */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
291 test ();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
292 if (sub(add(st->decAnaElapsedCount, st->dtxHangoverCount),
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
293 DTX_ELAPSED_FRAMES_THRESH) < 0)
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
294 {
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
295 *usedMode = MRDTX; move16();
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
296 /* if short time since decoder update, do not add extra HO */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
297 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
298 /*
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
299 else
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
300 override VAD and stay in
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
301 speech mode *usedMode
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
302 and add extra hangover
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
303 */
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
304 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
305 }
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
306
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
307 return compute_new_sid_possible;
5a1d18542f8a libtwamr: integrate dtx_dec.c and dtx_enc.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
308 }