codebase / stimlib

Commit 8057237a7a52a0d9a288a315a5a8fcb222f18bca

Authored by David Mayerich
1 parent abdb93f5

added an envi::open() function that re-opens a previously opened file with minimal processing

Showing 1 changed file with 25 additions and 14 deletions   Show diff stats
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stim/envi/envi.h
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... ... @@ -18,6 +18,7 @@ namespace stim{
18 18 class envi{
19 19  
20 20 void* file; //void pointer to the relevant file reader (bip, bsq, or bil - with appropriate data type)
  21 + std::string fname; //file name used for repeated opening and closing
21 22  
22 23 public:
23 24  
... ... @@ -131,22 +132,16 @@ public:
131 132  
132 133 }
133 134  
134   - /// Open an existing ENVI file given the filename and a header structure
135   -
136   - /// @param filename is the name of the ENVI binary file
137   - /// @param header is an ENVI header structure
138   - bool open(std::string filename, stim::envi_header h){
139   - allocate();
140   -
141   - header = h;
  135 + /// Open a previously opened ENVI file
  136 + bool open(){
142 137  
143 138 //load the file
144 139 if(header.interleave == envi_header::BSQ) { //if the infile is bsq file
145 140 if(header.data_type == envi_header::float32) {
146   - return ((bsq<float>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  141 + return ((bsq<float>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
147 142 }
148 143 else if(header.data_type == envi_header::float64) {
149   - return ((bsq<double>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  144 + return ((bsq<double>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
150 145 }
151 146 else
152 147 return false;
... ... @@ -154,10 +149,10 @@ public:
154 149  
155 150 else if(header.interleave == envi_header::BIL) { //if the infile is bil file
156 151 if(header.data_type == envi_header::float32) {
157   - return ((bil<float>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  152 + return ((bil<float>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
158 153 }
159 154 else if(header.data_type == envi_header::float64) {
160   - return ((bil<double>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  155 + return ((bil<double>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
161 156 }
162 157 else
163 158 return false;
... ... @@ -165,10 +160,10 @@ public:
165 160  
166 161 else if(header.interleave == envi_header::BIP) { //if the infile is bip file
167 162 if(header.data_type == envi_header::float32) {
168   - return ((bip<float>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  163 + return ((bip<float>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
169 164 }
170 165 else if(header.data_type == envi_header::float64) {
171   - return ((bip<double>*)file)->open(filename, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
  166 + return ((bip<double>*)file)->open(fname, header.samples, header.lines, header.bands, header.header_offset, header.wavelength);
172 167 }
173 168 else
174 169 return false;
... ... @@ -176,6 +171,22 @@ public:
176 171  
177 172 return true;
178 173  
  174 +
  175 + }
  176 +
  177 + /// Open an existing ENVI file given the filename and a header structure
  178 +
  179 + /// @param filename is the name of the ENVI binary file
  180 + /// @param header is an ENVI header structure
  181 + bool open(std::string filename, stim::envi_header h){
  182 + allocate();
  183 +
  184 + header = h; //store the header
  185 + fname = filename; //save the filename
  186 +
  187 + return open(); //open the ENVI file;
  188 +
  189 +
179 190 }
180 191  
181 192 /// Open an existing ENVI file given the file and header names.
... ...