FreeCalypso > hg > fc-magnetite
annotate src/cs/layer1/gtt_include/ctm/ctm_transmitter.h @ 394:fe200bd2f188
configs/*: converted to use scripts/config-headers-new.sh
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 17 Jan 2018 22:53:14 +0000 |
parents | 945cf7f506b2 |
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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_transmitter.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_transmitter.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_transmitter() |
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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_transmitter_h |
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27 #define ctm_transmitter_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 "ctm_typedefs.h" |
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36 #include "ctm_defines.h" |
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37 #include "init_interleaver.h" |
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38 #include "tonemod.h" |
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39 #include "conv_poly.h" |
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40 #include "fifo.h" |
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41 |
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42 /* ******************************************************************/ |
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43 /* Type definitions for variables that contain all states of the */ |
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44 /* CTM Transmitter */ |
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45 /* ******************************************************************/ |
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46 |
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47 typedef struct { |
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48 BOOL burstActive; |
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49 WORD16 cntIdleSymbols; |
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50 WORD16 cntEncBitsInCurrentBlock; |
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51 WORD16 cntTXBitsInCurrentBlock; |
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52 |
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53 /* vectors (not to be allocated) */ |
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54 WORD16 resync_sequence[RESYNC_SEQ_LENGTH]; |
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55 |
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56 #if (NUM_MUTE_ROWS>0) |
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57 WORD16 mutePositions[intlvB*NUM_MUTE_ROWS]; |
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58 #else |
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59 WORD16 mutePositions[1]; |
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60 #endif |
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61 |
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62 fifo_state_t fifo_state; |
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63 fifo_state_t octet_fifo_state; |
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64 interleaver_state_t diag_int_state; |
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65 conv_encoder_t conv_enc_state; |
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66 } tx_state_t; |
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67 |
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68 |
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69 |
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70 /***********************************************************************/ |
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71 /* init_ctm_transmitter() */ |
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72 /* ********************** */ |
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73 /* Initialization of the CTM Transmitter */ |
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74 /* */ |
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75 /* output vaiables: */ |
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76 /* tx_state : pointer to a variable of tx_state_t containing the */ |
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77 /* initialized states of the receiver */ |
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78 /***********************************************************************/ |
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79 |
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80 void init_ctm_transmitter(tx_state_t* tx_state); |
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81 /* |
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82 *********************************************************************** |
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83 * Shutdown_ctm_transmitter() * |
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84 * ********************** * |
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85 * Shutdown of the Cellular Text Telephone Modem transmitter and * |
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86 * deallocate memory used by the CTM Tx buffers. * |
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87 * * |
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88 * Input variables: * |
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89 * tx_state : pointer to a variable of tx_state_t containing the * |
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90 * initialized states of the transmitter. * |
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91 *********************************************************************** |
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92 */ |
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93 void Shutdown_ctm_transmitter(tx_state_t* tx_state); |
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94 |
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95 /* |
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96 *********************************************************************** |
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97 * reset_ctm_transmitter() * |
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98 * ********************** * |
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99 * Reset of the Cellular Text Telephone Modem transmitter, state * |
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100 * machines and buffer pointers. * |
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101 * * |
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102 * Input variables: * |
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103 * tx_state : pointer to a variable of tx_state_t containing the * |
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104 * initialized states of the transmitter. * |
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105 *********************************************************************** |
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106 */ |
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107 void reset_ctm_transmitter(tx_state_t* tx_state); |
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108 |
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109 |
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110 /***********************************************************************/ |
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111 /* ctm_transmitter() */ |
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112 /* ***************** */ |
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113 /* Runs the Cellular Text Telephone Modem (CTM) Transmitter for a */ |
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114 /* block of 160 output samples, representing 8 gross bits. */ |
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115 /* The bits, which are modulated into tones, are taken from an */ |
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116 /* internal fifo buffer. If the fifo buffer is empty, zero-valued */ |
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117 /* samples are generated. The fifo buffer is filled with */ |
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118 /* channel-encoded and interlaeved bits, which are generated */ |
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119 /* internally by coding the actual input character. With each call of */ |
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120 /* this function one or less input characters can be coded. If there */ |
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121 /* is no character to for transmission, one of the following code has */ |
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122 /* be used: */ |
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123 /* - 0xFFFF: indicates that there is no character to transmit and */ |
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124 /* that the transmitter should stay in idle mode, if it is */ |
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125 /* currently already in idle mode. If the transmitter is */ |
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126 /* NOT in idle mode, it might generate <IDLE> symbols in */ |
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127 /* to keep an active burst running. The CTM burst is */ |
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128 /* terminated if five <IDLE> symbols have been generated */ |
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129 /* consecutevely. */ |
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130 /* */ |
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131 /* - 0xFFFE: although there is no character to transmit, a CTM burst */ |
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132 /* is initiated in order to signalize to the far-end side */ |
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133 /* that CTM is supported. The burst starts with the <IDLE> */ |
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134 /* symbol and will be contiued with <IDLE> symbols if there */ |
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135 /* are no regular characters handed over during the next */ |
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136 /* calls of this function. The CTM burst is terminated if */ |
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137 /* five <IDLE> symbols have been transmitted consecutevely. */ |
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138 /* */ |
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139 /* In order to avoid an overflow of the internal fifo buffer, the */ |
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140 /* variable *ptrNumBitsStillToModulate should be checked before */ |
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141 /* calling this function. */ |
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142 /* */ |
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143 /* input variables: */ |
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144 /* ucsCode UCS code of the character */ |
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145 /* or one of the codes 0xFFFF or 0xFFFE */ |
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146 /* sineOutput must be false in regular mode; if true, */ |
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147 /* a pure sine output signal is generated */ |
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148 /* output variables: */ |
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149 /* txToneVec output signal (vector of 160 samples) */ |
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150 /* input/output variables: */ |
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151 /* tx_state pointer to the variable containing the */ |
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152 /* transmitter states */ |
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153 /***********************************************************************/ |
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154 |
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155 void ctm_transmitter(UWORD16 ucsCode, |
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156 fifo_state_t* ctmCodeOutputVec, |
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157 tx_state_t* tx_state ); |
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158 |
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159 #endif |