1 | // |
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2 | // C++ Implementation: STFrequencies |
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3 | // |
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4 | // Description: |
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5 | // |
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6 | // |
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7 | // Author: Malte Marquarding <asap@atnf.csiro.au>, (C) 2006 |
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8 | // |
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9 | // Copyright: See COPYING file that comes with this distribution |
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10 | // |
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11 | // |
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12 | #include <casa/iostream.h> |
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13 | #include <casa/iomanip.h> |
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14 | #include <casa/Exceptions/Error.h> |
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15 | #include <casa/Containers/RecordField.h> |
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16 | #include <casa/Arrays/IPosition.h> |
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17 | |
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18 | #include <tables/Tables/TableDesc.h> |
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19 | #include <tables/Tables/SetupNewTab.h> |
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20 | #include <tables/Tables/ScaColDesc.h> |
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21 | #include <tables/Tables/TableRecord.h> |
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22 | #include <tables/Tables/TableParse.h> |
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23 | #include <tables/Tables/TableRow.h> |
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24 | |
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25 | #include <coordinates/Coordinates/CoordinateSystem.h> |
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26 | #include <coordinates/Coordinates/CoordinateUtil.h> |
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27 | |
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28 | #include "STFrequencies.h" |
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29 | |
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30 | |
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31 | using namespace casa; |
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32 | |
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33 | namespace asap { |
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34 | |
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35 | const casa::String STFrequencies::name_ = "FREQUENCIES"; |
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36 | |
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37 | STFrequencies::STFrequencies(casa::Table::TableType tt) : |
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38 | STSubTable( name_, tt ) |
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39 | { |
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40 | setup(); |
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41 | } |
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42 | |
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43 | |
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44 | STFrequencies::~STFrequencies() |
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45 | { |
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46 | } |
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47 | |
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48 | void STFrequencies::setup( ) |
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49 | { |
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50 | // add to base class table |
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51 | table_.addColumn(ScalarColumnDesc<Double>("REFPIX")); |
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52 | table_.addColumn(ScalarColumnDesc<Double>("REFVAL")); |
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53 | table_.addColumn(ScalarColumnDesc<Double>("INCREMENT")); |
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54 | |
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55 | table_.rwKeywordSet().define("REFFRAME", String("TOPO")); |
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56 | table_.rwKeywordSet().define("EQUINOX",String( "J2000")); |
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57 | table_.rwKeywordSet().define("UNIT", String("Hz")); |
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58 | table_.rwKeywordSet().define("DOPPLER", String("RADIO")); |
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59 | |
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60 | // new cached columns |
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61 | refpixCol_.attach(table_,"REFPIX"); |
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62 | refvalCol_.attach(table_,"REFVAL"); |
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63 | incrCol_.attach(table_,"INCREMENT"); |
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64 | } |
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65 | |
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66 | uInt STFrequencies::addEntry( Double refpix, Double refval, Double inc ) |
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67 | { |
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68 | // test if this already exists |
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69 | Table result = table_( near(table_.col("REFVAL"), refval) |
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70 | && near(table_.col("REFPIX"), refpix) |
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71 | && near(table_.col("INCREMENT"), inc) ); |
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72 | uInt resultid = 0; |
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73 | if ( result.nrow() > 0) { |
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74 | ROScalarColumn<uInt> c(result, "ID"); |
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75 | c.get(0, resultid); |
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76 | |
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77 | } else { |
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78 | uInt rno = table_.nrow(); |
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79 | table_.addRow(); |
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80 | // get last assigned freq_id and increment |
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81 | if ( rno > 0 ) { |
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82 | idCol_.get(rno-1, resultid); |
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83 | resultid++; |
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84 | } |
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85 | refpixCol_.put(rno, refpix); |
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86 | refvalCol_.put(rno, refval); |
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87 | incrCol_.put(rno, inc); |
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88 | idCol_.put(rno, resultid); |
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89 | } |
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90 | return resultid; |
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91 | } |
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92 | |
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93 | |
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94 | SpectralCoordinate STFrequencies::getSpectralCoordinate( uInt freqID ) |
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95 | { |
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96 | Table t = table_(table_.col("ID") == Int(freqID) ); |
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97 | |
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98 | if (t.nrow() == 0 ) { |
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99 | throw(AipsError("STFrequencies::getSpectralCoordinate - freqID out of range")); |
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100 | } |
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101 | |
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102 | // get the data |
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103 | ROTableRow row(t); |
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104 | // get first row - there should only be one matching id |
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105 | const TableRecord& rec = row.get(0); |
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106 | |
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107 | return SpectralCoordinate( getFrame(), rec.asDouble("REFVAL"), |
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108 | rec.asDouble("INCREMENT"), |
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109 | rec.asDouble("REFPIX")); |
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110 | } |
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111 | |
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112 | void STFrequencies::rescale( casa::Float factor, const std::string& mode ) |
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113 | { |
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114 | TableRow row(table_); |
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115 | TableRecord& outrec = row.record(); |
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116 | RecordFieldPtr<Double> rv(outrec, "REFVAL"); |
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117 | RecordFieldPtr<Double> rp(outrec, "REFPIX"); |
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118 | RecordFieldPtr<Double> inc(outrec, "INCREMENT"); |
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119 | for (uInt i=0; i<table_.nrow(); ++i) { |
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120 | |
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121 | const TableRecord& rec = row.get(i); |
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122 | |
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123 | SpectralCoordinate sc ( getFrame(), rec.asDouble("REFVAL"), |
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124 | rec.asDouble("INCREMENT"), rec.asDouble("REFPIX") ); |
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125 | |
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126 | SpectralCoordinate scout; |
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127 | if (mode == "BIN") { |
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128 | scout = binCsys(sc, Int(factor)); |
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129 | } else if (mode == "RESAMPLE") { |
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130 | scout = resampleCsys(sc, factor); |
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131 | } |
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132 | *rv = scout.referenceValue()[0]; |
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133 | *rp = scout.referencePixel()[0]; |
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134 | *inc = scout.increment()[0]; |
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135 | row.put(i); |
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136 | } |
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137 | } |
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138 | |
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139 | SpectralCoordinate STFrequencies::binCsys(const SpectralCoordinate& sc, |
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140 | Int factor) |
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141 | { |
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142 | CoordinateSystem csys; |
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143 | csys.addCoordinate(sc); |
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144 | IPosition factors(1, factor); |
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145 | CoordinateSystem binnedcs = |
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146 | CoordinateUtil::makeBinnedCoordinateSystem(factors, csys, False); |
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147 | return binnedcs.spectralCoordinate(0); |
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148 | } |
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149 | |
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150 | SpectralCoordinate STFrequencies::resampleCsys(const SpectralCoordinate& sc, |
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151 | Float width) |
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152 | { |
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153 | Vector<Float> offset(1,0.0); |
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154 | Vector<Float> factors(1,1.0/width); |
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155 | Vector<Int> newshape; |
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156 | CoordinateSystem csys; |
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157 | csys.addCoordinate(sc); |
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158 | CoordinateSystem csys2 = csys.subImage(offset, factors, newshape); |
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159 | return csys2.spectralCoordinate(0); |
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160 | } |
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161 | |
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162 | |
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163 | casa::MFrequency::Types STFrequencies::getFrame( ) const |
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164 | { |
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165 | // get the ref frame |
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166 | String rf; |
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167 | table_.keywordSet().get("REFFRAME", rf); |
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168 | |
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169 | // Create SpectralCoordinate (units Hz) |
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170 | MFrequency::Types mft; |
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171 | if (!MFrequency::getType(mft, rf)) { |
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172 | ostringstream oss; |
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173 | pushLog("WARNING: Frequency type unknown assuming TOPO"); |
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174 | mft = MFrequency::TOPO; |
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175 | } |
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176 | |
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177 | return mft; |
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178 | } |
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179 | |
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180 | std::string asap::STFrequencies::print( int id ) |
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181 | { |
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182 | Table t; |
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183 | ostringstream oss; |
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184 | if ( id < 0 ) t = table_; |
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185 | else t = table_(table_.col("ID") == Int(id) ); |
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186 | ROTableRow row(t); |
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187 | for (uInt i=0; i<t.nrow(); ++i) { |
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188 | const TableRecord& rec = row.get(i); |
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189 | oss << setw(8) |
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190 | << "frame" << setw(16) << setprecision(8) |
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191 | << rec.asDouble("REFVAL") << setw(10) |
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192 | << rec.asDouble("REFPIX") << setw(12) |
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193 | << rec.asDouble("INCREMENT") << endl; |
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194 | } |
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195 | return String(oss); |
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196 | } |
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197 | |
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198 | float STFrequencies::getRefFreq( uInt id, uInt channel ) |
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199 | { |
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200 | Table t = table_(table_.col("ID") == Int(id) ); |
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201 | if ( t.nrow() == 0 ) throw(AipsError("Selected Illegal frequency id")); |
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202 | ROTableRow row(t); |
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203 | const TableRecord& rec = row.get(0); |
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204 | return (Double(channel/2) - rec.asDouble("REFPIX")) |
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205 | * rec.asDouble("INCREMENT") + rec.asDouble("REFVAL"); |
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206 | } |
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207 | |
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208 | } // namespace |
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