FreeCalypso > hg > fc-magnetite
annotate src/gpf3/ccd/gsm1_v.c @ 2:c41a534f33c6
src/gpf3: preened GPF goo from TCS3.2
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 25 Sep 2016 23:52:50 +0000 |
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1 /* |
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2 +----------------------------------------------------------------------------- |
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3 | Project : |
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4 | Modul : gsm1_v.c |
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5 +----------------------------------------------------------------------------- |
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6 | Copyright 2002 Texas Instruments Berlin, AG |
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7 | All rights reserved. |
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8 | |
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9 | This file is confidential and a trade secret of Texas |
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10 | Instruments Berlin, AG |
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11 | The receipt of or possession of this file does not convey |
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12 | any rights to reproduce or disclose its contents or to |
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13 | manufacture, use, or sell anything it may describe, in |
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14 | whole, or in part, without the specific written consent of |
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15 | Texas Instruments Berlin, AG. |
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16 +----------------------------------------------------------------------------- |
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17 | Purpose : Definition of encoding and decoding functions for GSM1_V elements |
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18 +----------------------------------------------------------------------------- |
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19 */ |
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20 |
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21 |
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22 /* |
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23 * standard definitions like GLOBAL, UCHAR, ERROR etc. |
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24 */ |
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25 #include "typedefs.h" |
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26 #include "header.h" |
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27 |
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28 /* |
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29 * Prototypes of ccd (USE_DRIVER EQ undef) for prototypes only |
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30 * look at ccdapi.h |
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31 */ |
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32 #undef USE_DRIVER |
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33 #include "ccdapi.h" |
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34 |
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35 /* |
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36 * Types and functions for bit access and manipulation |
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37 */ |
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38 #include "ccd_globs.h" |
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39 #include "bitfun.h" |
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40 |
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41 /* |
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42 * Prototypes of ccd internal functions |
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43 */ |
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44 #include "ccd.h" |
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45 |
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46 |
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47 /* |
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48 * Declaration of coder/decoder tables |
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49 */ |
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50 #include "ccdtable.h" |
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51 #include "ccddata.h" |
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52 |
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53 #ifndef RUN_FLASH |
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54 /* |
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55 +--------------------------------------------------------------------+ |
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56 | PROJECT : CCD (6144) MODULE : CDC_GSM | |
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57 | STATE : code ROUTINE : cdc_gsm1v_decode | |
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58 +--------------------------------------------------------------------+ |
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59 |
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60 PURPOSE : Decoding of the GSM Type 1V element. This element |
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61 consists of a V component with max. 4 Bit length. |
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62 */ |
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63 |
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64 SHORT cdc_gsm1v_decode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) |
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65 { |
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66 SHORT ret; |
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67 ULONG cix_ref, num_prolog_steps, prolog_step_ref; |
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68 |
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69 #ifdef DEBUG_CCD |
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70 #ifndef CCD_SYMBOLS |
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71 TRACE_CCD (globs, "cdc_gsm1v_decode()"); |
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72 #else |
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73 TRACE_CCD (globs, "cdc_gsm1v_decode() %s", ccddata_get_alias((USHORT) e_ref, 1)); |
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74 #endif |
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75 #endif |
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76 |
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77 cix_ref = melem[e_ref].calcIdxRef; |
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78 num_prolog_steps = calcidx[cix_ref].numPrologSteps; |
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79 prolog_step_ref = calcidx[cix_ref].prologStepRef; |
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80 |
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81 /* |
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82 * if this element have a defined Prolog |
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83 * we have to process it before decoding the bitstream |
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84 */ |
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85 if (num_prolog_steps) |
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86 { |
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87 ccd_performOperations (num_prolog_steps, prolog_step_ref, globs); |
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88 } |
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89 |
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90 if (!globs->Swap1V_inProgress) |
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91 { |
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92 /* |
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93 * check if the next element is a GSM1V too |
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94 */ |
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95 if ((ULONG)(mcomp[c_ref].componentRef |
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96 +mcomp[c_ref].numOfComponents) > e_ref |
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97 AND (melem[e_ref].codingType EQ melem[e_ref+1].codingType |
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98 OR melem[e_ref+1].elemType EQ 'S')) |
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99 { |
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100 if (melem[e_ref+1].elemType EQ 'S') |
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101 { |
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102 /* |
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103 * if the next element is a spare then skip the next 4 bits |
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104 * do not decode the spare bits. |
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105 */ |
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106 bf_setBitpos ((globs->bitpos+4), globs); |
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107 |
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108 ret = cdc_std_decode (c_ref, e_ref, globs); |
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109 |
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110 if (ret EQ 1) |
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111 ret++; |
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112 |
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113 return ret; |
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114 } |
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115 else |
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116 { |
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117 /* |
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118 * another 1V-element follow. We have to swap the nibbles. |
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119 */ |
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120 globs->Swap1V_inProgress = TRUE; |
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121 /* |
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122 * store the akt position |
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123 */ |
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124 globs->akt1VPos = (USHORT)(globs->bitpos+4); |
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125 globs->next1VPos = globs->bitpos; |
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126 |
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127 bf_setBitpos (globs->akt1VPos, globs); |
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128 ret = cdc_std_decode (c_ref, e_ref, globs); |
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129 /* |
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130 * increment the globs->maxBitpos by 1 so the bf_endOfBitstream |
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131 * will return FALSE |
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132 */ |
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133 globs->maxBitpos++; |
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134 |
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135 return ret; |
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136 } |
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137 } |
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138 ret = cdc_std_decode (c_ref, e_ref, globs); |
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139 |
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140 } |
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141 else |
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142 { |
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143 globs->akt1VPos = globs->next1VPos; |
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144 globs->next1VPos = globs->bitpos; |
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145 |
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146 bf_setBitpos (globs->akt1VPos, globs); |
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147 |
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148 /* |
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149 * decrement the globs->maxBitpos by 1 so the bf_endOfBitstream |
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150 * will return TRUE if the bitstream ended |
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151 */ |
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152 globs->maxBitpos--; |
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153 |
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154 ret = cdc_std_decode (c_ref, e_ref, globs); |
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155 |
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156 bf_setBitpos (globs->next1VPos, globs); |
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157 |
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158 globs->Swap1V_inProgress = FALSE; |
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159 |
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|
160 } |
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161 return ret; |
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|
162 } |
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163 #endif /* !RUN_FLASH */ |
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164 |
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165 #ifndef RUN_FLASH |
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166 /* |
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|
167 +--------------------------------------------------------------------+ |
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|
168 | PROJECT : CCD (6144) MODULE : CDC_GSM | |
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169 | STATE : code ROUTINE : cdc_gsm1v_encode | |
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|
170 +--------------------------------------------------------------------+ |
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|
171 |
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|
172 PURPOSE : encoding of the GSM Type 1V element. This element |
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|
173 consists of a V component with max. 4 Bit length. |
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|
174 */ |
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|
175 |
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parents:
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|
176 SHORT cdc_gsm1v_encode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs) |
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|
177 { |
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parents:
diff
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|
178 #ifdef DEBUG_CCD |
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|
179 #ifndef CCD_SYMBOLS |
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180 TRACE_CCD (globs, "cdc_gsm1v_encode()"); |
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|
181 #else |
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182 TRACE_CCD (globs, "cdc_gsm1v_encode() %s", ccddata_get_alias((USHORT) e_ref, 1)); |
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|
183 #endif |
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|
184 #endif |
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185 |
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|
186 if (!globs->Swap1V_inProgress) |
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|
187 { |
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|
188 /* |
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|
189 * check if the next element is a GSM1V too |
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|
190 */ |
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|
191 if ((ULONG)(mcomp[c_ref].componentRef |
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|
192 +mcomp[c_ref].numOfComponents) > e_ref |
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|
193 AND (melem[e_ref].codingType EQ melem[e_ref+1].codingType |
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|
194 OR melem[e_ref+1].elemType EQ 'S')) |
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|
195 { |
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|
196 if (melem[e_ref+1].elemType EQ 'S') |
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|
197 { |
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|
198 SHORT ret; |
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parents:
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|
199 /* |
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|
200 * if the next element is a spare then skip the next 4 bits |
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|
201 * do not code the spare bits because the bitstream is cleared. |
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|
202 */ |
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|
203 bf_setBitpos (globs->bitpos+4, globs); |
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|
204 |
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|
205 ret = cdc_std_encode (c_ref, e_ref, globs); |
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|
206 |
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diff
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|
207 if (ret EQ 1) |
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|
208 ret++; |
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|
209 |
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parents:
diff
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|
210 return ret; |
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parents:
diff
changeset
|
211 } |
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parents:
diff
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|
212 else |
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parents:
diff
changeset
|
213 { |
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parents:
diff
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|
214 /* |
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parents:
diff
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|
215 * another 1V-element follow. We have to swap the nibbles. |
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parents:
diff
changeset
|
216 */ |
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parents:
diff
changeset
|
217 globs->Swap1V_inProgress = TRUE; |
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parents:
diff
changeset
|
218 /* |
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219 * store the akt position |
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220 */ |
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221 globs->akt1VPos = (USHORT)(globs->bitpos+4); |
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222 globs->next1VPos = globs->bitpos; |
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223 |
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224 bf_setBitpos (globs->akt1VPos, globs); |
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225 } |
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226 } |
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227 return cdc_std_encode (c_ref, e_ref, globs); |
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228 } |
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229 else |
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230 { |
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231 SHORT ret; |
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232 |
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233 globs->akt1VPos = globs->next1VPos; |
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234 globs->next1VPos = globs->bitpos; |
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235 |
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236 bf_setBitpos (globs->akt1VPos, globs); |
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237 |
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238 ret = cdc_std_encode (c_ref, e_ref, globs); |
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239 |
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240 bf_setBitpos (globs->next1VPos, globs); |
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241 |
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242 globs->Swap1V_inProgress = FALSE; |
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243 |
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244 return ret; |
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245 } |
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246 } |
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247 #endif /* !RUN_FLASH */ |