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annotate libtwamr/ec_gains.h @ 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 9cbd1b5d061f
children
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9cbd1b5d061f libtwamr: integrate ec_gains.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 : ec_gains.h
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11 * Purpose: : Error concealment for pitch and codebook gains
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12 *
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13 ********************************************************************************
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14 */
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15 #ifndef ec_gains_h
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16 #define ec_gains_h "$Id $"
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17
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18 /*
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19 ********************************************************************************
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20 * INCLUDE FILES
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21 ********************************************************************************
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22 */
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23 #include "typedef.h"
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24 #include "gc_pred.h"
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25
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26 /*
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27 ********************************************************************************
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28 * LOCAL VARIABLES AND TABLES
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29 ********************************************************************************
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30 */
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31
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32 /*
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33 ********************************************************************************
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34 * DEFINITION OF DATA TYPES
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35 ********************************************************************************
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36 */
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37 typedef struct {
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38 Word16 pbuf[5];
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39 Word16 past_gain_pit;
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40 Word16 prev_gp;
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41 } ec_gain_pitchState;
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42
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43 typedef struct {
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44 Word16 gbuf[5];
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45 Word16 past_gain_code;
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46 Word16 prev_gc;
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47 } ec_gain_codeState;
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48 /*
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49 ********************************************************************************
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50 * DECLARATION OF PROTOTYPES
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51 ********************************************************************************
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52 */
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53
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54 /*
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55 **************************************************************************
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56 *
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57 * Function : ec_gain_code_reset
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58 * Purpose : Resets state memory
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59 *
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60 **************************************************************************
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61 */
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62 void ec_gain_code_reset (
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63 ec_gain_codeState *state
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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 *
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69 * Function : ec_gain_code
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70 * Purpose : conceal the codebook gain
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71 * Call this function only in BFI (instead of normal gain
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72 * decoding function)
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73 *
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74 **************************************************************************
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75 */
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76 void ec_gain_code (
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77 ec_gain_codeState *st, /* i/o : State struct */
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78 gc_predState *pred_state, /* i/o : MA predictor state */
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79 Word16 state, /* i : state of the state machine */
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80 Word16 *gain_code /* o : decoded innovation gain */
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81 );
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82
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83 /*
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84 **************************************************************************
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85 *
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86 * Function : ec_gain_code_update
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87 * Purpose : update the codebook gain concealment state;
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88 * limit gain_code if the previous frame was bad
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89 * Call this function always after decoding (or concealing)
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90 * the gain
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91 *
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92 **************************************************************************
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93 */
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94 void ec_gain_code_update (
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95 ec_gain_codeState *st, /* i/o : State struct */
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96 Word16 bfi, /* i : flag: frame is bad */
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97 Word16 prev_bf, /* i : flag: previous frame was bad */
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98 Word16 *gain_code /* i/o : decoded innovation gain */
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99 );
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100
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101 /*
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102 **************************************************************************
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103 *
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104 * Function: ec_gain_pitch_reset
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105 * Purpose: Resets state memory
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106 *
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107 **************************************************************************
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108 */
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109 void ec_gain_pitch_reset (
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110 ec_gain_pitchState *state
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111 );
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112
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113 /*
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114 **************************************************************************
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115 *
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116 * Function : ec_gain_pitch
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117 * Purpose : conceal the pitch gain
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118 * Call this function only in BFI (instead of normal gain
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119 * decoding function)
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120 *
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121 **************************************************************************
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122 */
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123 void ec_gain_pitch (
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124 ec_gain_pitchState *st, /* i/o : state variables */
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125 Word16 state, /* i : state of the state machine */
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126 Word16 *gain_pitch /* o : pitch gain (Q14) */
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127 );
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128
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129 /*
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130 **************************************************************************
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131 *
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132 * Function : ec_gain_pitch_update
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133 * Purpose : update the pitch gain concealment state;
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134 * limit gain_pitch if the previous frame was bad
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135 * Call this function always after decoding (or concealing)
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136 * the gain
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137 *
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138 **************************************************************************
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139 */
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140 void ec_gain_pitch_update (
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141 ec_gain_pitchState *st, /* i/o : state variables */
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142 Word16 bfi, /* i : flag: frame is bad */
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143 Word16 prev_bf, /* i : flag: previous frame was bad */
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144 Word16 *gain_pitch /* i/o : pitch gain */
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145 );
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146
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147 #endif