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annotate src/cs/layer1/gtt_include/ctm/ctm_receiver.h @ 1:5a26a267684f

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targets: new minimal headers created
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 15 May 2020 01:45:24 +0000
parents 92470e5d0b9e
children
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1 /*
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2 *******************************************************************************
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3 *
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
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5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
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6 *
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7 * The program(s) may be used and/or copied only with the
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8 * written permission from Ericsson or in accordance
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9 * with the terms and conditions stipulated in the agreement or
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10 * contract under which the program(s) have been supplied.
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11 *
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12 *******************************************************************************
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13 *
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14 * File : ctm_receiver.h
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15 * Author : EEDN/RV Matthias Doerbecker
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16 * Tested Platforms : Sun Solaris, Windows NT 4.0
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17 * Description : header file for ctm_receiver.c
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18 *
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19 * Changes since October 13, 2000:
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20 * - added reset function reset_ctm_receiver()
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21 *
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22 * $Log: $
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23 *
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24 *******************************************************************************
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25 */
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26 #ifndef ctm_receiver_h
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27 #define ctm_receiver_h "$Id: $"
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28
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29 /*
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30 *******************************************************************************
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31 * INCLUDE FILES
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32 *******************************************************************************
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33 */
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34
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35 #include "init_interleaver.h"
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36 //#include "tonedemod.h"
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37 #include "wait_for_sync.h"
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38 #include "conv_poly.h"
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39 #include "viterbi.h"
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40 #include "ctm_typedefs.h"
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41 #include "fifo.h"
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42
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43 #include <stdlib.h>
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44 #include <stdio.h>
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45
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46
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47 /* ******************************************************************/
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48 /* Type definitions for variables that contain all states of the */
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49 /* Cellular Text Telephone Modem (CTM) Transmitter and Receiver, */
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50 /* respectively. */
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51 /* ******************************************************************/
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52
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53 typedef struct {
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54 /* simple variables */
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55 WORD16 samplingCorrection;
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56 WORD16 numBitsWithLowReliability;
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57 WORD16 cntIdleSymbols;
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58 WORD16 numDeintlBits;
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59 WORD16 cntRXBits;
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60 WORD16 syncCorrect;
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61 WORD16 cntUnreliableGrossBits;
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62 WORD16 intl_delay;
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63
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64 /* structs (state types) */
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65 fifo_state_t rx_bits_fifo_state;
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66 fifo_state_t octet_fifo_state;
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67 fifo_state_t net_bits_fifo_state;
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68 //demod_state_t tonedemod_state;
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69 // interleaver_state_t intl_state;
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70 interleaver_state_t deintl_state;
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71 wait_for_sync_state_t wait_state;
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72 viterbi_t viterbi_state;
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73
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74 /* vectors (not to be allocated) */
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75 #if (NUM_MUTE_ROWS>0)
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76 WORD16 mutePositions[intlvB*NUM_MUTE_ROWS];
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77 #else
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78 WORD16 mutePositions[1];
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79 #endif
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80
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81 /* vectors (to be allocated in init_ctm_receiver()) */
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82 WORD16 *waitSyncOut;
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83 WORD16 *deintlOut;
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84
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85 } rx_state_t;
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86
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87
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88
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89
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90 /***********************************************************************/
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91 /* init_ctm_receiver() */
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92 /* ******************* */
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93 /* Initialization of the CTM Receiver. */
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94 /* */
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95 /* output vaiables: */
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96 /* rx_state : pointer to a variable of rx_state_t containing the */
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97 /* initialized states of the receiver */
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98 /***********************************************************************/
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99
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100 void init_ctm_receiver(rx_state_t* rx_state);
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101
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102 /*
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103 ***********************************************************************
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104 * Shutdown_ctm_receiver() *
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105 * *********************** *
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106 * Shutdown of the CTM Receiver. *
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107 * *
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108 * Input variables: *
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109 * rx_state : pointer to a variable of rx_state_t containing the *
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110 * initialized states of the receiver *
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111 ***********************************************************************
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112 */
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113 void Shutdown_ctm_receiver(rx_state_t* rx_state);
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114
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115 /*
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116 ***********************************************************************
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117 * reset_ctm_receiver() *
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118 * ******************** *
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119 * Reset of the Cellular Text Telephone Modem receiver, state *
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120 * machines and buffer pointers. *
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121 * *
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122 * Input variables: *
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123 * rx_state : pointer to a variable of rx_state_t containing the *
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124 * initialized states of the receiver *
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125 ***********************************************************************
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126 */
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127 void reset_ctm_receiver(rx_state_t* rx_state);
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128
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129
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130 /***************************************************************************/
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131 /* ctm_receiver() */
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132 /* ************** */
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133 /* Runs the Cellular Text Telephone Modem Receiver for a block of */
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134 /* (nominally) 160 samples. Due to the internal synchronization, the */
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135 /* number of processed samples might vary between 156 and 164 samples. */
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136 /* The input of the samples and the output of the decoded characters */
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137 /* is handled via fifo buffers, which have to be initialized */
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138 /* externally before using this function (see fifo.h for details). */
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139 /* */
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140 /* input/output variables: */
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141 /* *ptr_signal_fifo_state fifo state for the input samples */
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142 /* *ptr_output_char_fifo_state fifo state for the output characters */
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143 /* *ptr_early_muting_required returns whether the original audio signal */
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144 /* must not be forwarded. This is to guarantee */
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145 /* that the preamble or resync sequence is */
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146 /* detected only by the first CTM device, if */
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147 /* several CTM devices are cascaded */
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148 /* subsequently. */
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149 /* *rx_state pointer to the variable containing the */
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150 /* receiver states */
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151 /***************************************************************************/
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152
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153 void ctm_receiver(fifo_state_t* ptr_signal_fifo_state,
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154 fifo_state_t* ptr_output_char_fifo_state,
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155 BOOL* ptr_early_muting_required,
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156 rx_state_t* rx_state);
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157
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158 #endif