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annotate libgsmefr/e_homing.c @ 585:3c6bf0d26ee7 default tip

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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents 035424a6ca83
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**************************************************************************
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2 *
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3 * File Name: e_homing.c
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4 *
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5 * Purpose:
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6 * This file contains the following functions:
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7 *
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8 * encoder_homing_frame_test() checks if a frame of input samples
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9 * matches the Encoder Homing Frame pattern.
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10 *
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11 * encoder_reset() called by reset_enc() to reset all
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12 * the state variables for the encoder.
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13 *
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14 * reset_enc() calls functions to reset the state
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15 * variables for the encoder and VAD, and
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16 * for the transmit DTX and Comfort Noise.
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17 *
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18 **************************************************************************/
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19
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20 #include "gsm_efr.h"
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21 #include "typedef.h"
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22 #include "namespace.h"
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23 #include "cnst.h"
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24 #include "vad.h"
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25 #include "dtx.h"
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26 #include "codec.h"
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27 #include "sig_proc.h"
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28 #include "memops.h"
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29 #include "enc_state.h"
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30 #include "e_homing.h"
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31
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32 /***************************************************************************
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33 *
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34 * FUNCTION NAME: encoder_homing_frame_test
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35 *
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36 * PURPOSE:
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37 * Checks if a frame of input samples matches the Encoder Homing Frame
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38 * pattern, which is 0x0008 for all 160 samples in the frame.
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39 *
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40 * INPUT:
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41 * input_frame[] one frame of speech samples
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42 *
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43 * OUTPUT:
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44 * None
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45 *
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46 * RETURN:
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47 * 0 input frame does not match the Encoder Homing Frame pattern.
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48 * 1 input frame matches the Encoder Homing Frame pattern.
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49 *
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50 **************************************************************************/
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51
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52 Word16 encoder_homing_frame_test (const Word16 input_frame[])
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53 {
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54 Word16 i, j;
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55
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56 for (i = 0; i < L_FRAME; i++)
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57 {
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58 j = input_frame[i] ^ EHF_MASK;
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59
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60 if (j)
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61 break;
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62 }
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63
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64 return !j;
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65 }
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66
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67 /***************************************************************************
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68 *
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69 * FUNCTION NAME: encoder_reset
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70 *
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71 * PURPOSE:
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72 * resets all of the state variables for the encoder
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73 *
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74 * INPUT:
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75 * None
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76 *
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77 * OUTPUT:
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78 * None
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79 *
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80 * RETURN:
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81 * None
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82 *
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83 **************************************************************************/
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84
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85 void encoder_reset (struct EFR_encoder_state *st)
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86 {
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87 Word16 i;
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88
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89 /* reset all the encoder state variables */
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90 /* ------------------------------------- */
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91
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92 /* Variables in cod_12k2.c: */
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93 Init_Coder_12k2 (st);
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94
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95 /* Variables in levinson.c: */
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96 st->old_A[0] = 4096; /* Last A(z) for case of unstable filter */
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97 for (i = 1; i < M + 1; i++)
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98 {
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99 st->old_A[i] = 0;
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100 }
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101
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102 /* Variables in pre_proc.c: */
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103 Init_Pre_Process (st);
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104
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105 /* Variables in q_gains.c: */
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106 for (i = 0; i < 4; i++)
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107 {
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108 st->past_qua_en[i] = -2381; /* past quantized energies */
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109 }
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110
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111 st->pred[0] = 44; /* MA prediction coeff */
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112 st->pred[1] = 37; /* MA prediction coeff */
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113 st->pred[2] = 22; /* MA prediction coeff */
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114 st->pred[3] = 12; /* MA prediction coeff */
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115
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116 /* Variables in q_plsf_5.c: */
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117 for (i = 0; i < M; i++)
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118 {
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119 st->past_r2_q[i] = 0; /* Past quantized prediction error */
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120 }
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121
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122 return;
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123 }
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124
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125 /***************************************************************************
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126 *
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127 * FUNCTION NAME: reset_enc
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128 *
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129 * PURPOSE:
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130 * resets all of the state variables for the encoder and VAD, and for
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131 * the transmit DTX and Comfort Noise.
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132 *
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133 * INPUT:
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134 * None
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135 *
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136 * OUTPUT:
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137 * None
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138 *
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139 * RETURN:
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140 * None
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141 *
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142 **************************************************************************/
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143
68
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144 void EFR_encoder_reset (struct EFR_encoder_state *st, int dtx)
53
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145 {
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146 st->dtx_mode = dtx;
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147
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148 encoder_reset (st); /* reset all the state variables in the speech encoder*/
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149 vad_reset (st); /* reset all the VAD state variables */
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150 reset_tx_dtx (st); /* reset all the transmit DTX and CN variables */
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151
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152 return;
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153 }