-
Notifications
You must be signed in to change notification settings - Fork 15
Expand file tree
/
Copy pathMatFile.java
More file actions
234 lines (201 loc) · 8.46 KB
/
MatFile.java
File metadata and controls
234 lines (201 loc) · 8.46 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Date;
/**
* See http://www.mathworks.com/help/pdf_doc/matlab/matfile_format.pdf
* for more info
*/
public class MatFile implements ECGOutputFile {
private FileOutputStream fs;
private static String pad(String s, int totalLen, char padWith) {
String ret = new String(s);
for(int i = 0; i < totalLen - s.length(); i++) {
ret += new String(new char[]{padWith});
}
return ret;
}
public MatFile(String filename) {
try {
fs = new FileOutputStream(filename);
} catch(FileNotFoundException e) {}
}
public void write(ECGDataSet[] data, int offset) //data - channels, x/y, entries
throws IOException {
int n = data[0].size(); //# of data points
int m = data.length; //# of channels
//calculating matrix sizes
int c = 56;
int b = 40 + (8 + c)*n*2;
int a = 48 + (8 + b)*m;
ByteOrder ord = ByteOrder.nativeOrder();
//descriptive text
Date now = new Date();
fs.write(pad("MATLAB 5.0 MAT-file, Created on: " + now.toString(),
116,
' ').getBytes(),
0,
116);
//flags? - not important
fs.write(new byte[]{0, 0, 0, 0, 0, 0, 0, 0});
//version - default
fs.write(new byte[]{0, 1});
//endian indicator - little
fs.write("IM".getBytes());
//////Start channel arrays (Cell Array)///////////
// miMATRIX
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
//size of matrix in bytes
fs.write(ByteBuffer.allocate(4).order(ord).putInt(a).array());
//HEADER of channel arrays miUINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
// mxCELL_CLASS
fs.write(new byte[]{1, 0, 0, 0, 0, 0, 0, 0});
// miINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
//write matrix size
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(m).array());
//name miINT8
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write("leads".getBytes());
fs.write(new byte[]{0, 0, 0}); //padding
//END HEADER
for(int i = 0; i < m; i++) {
//////////Start channel array (Double Array)////////
// miMATRIX
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
//size of the matrix
fs.write(ByteBuffer.allocate(4).order(ord).putInt(b).array());
//HEADER of channel array
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(new byte[]{1, 0, 0, 0, 0, 0, 0, 0});
// miINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
//write matrix size
fs.write(ByteBuffer.allocate(4).order(ord).putInt(2).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(n).array());
//name miINT8
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(0).array()); //no name
//END HEADER
for(int j = 0; j < n; j++) {
for(int k = 0; k < 2; k++) {
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(c).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(new byte[]{6, 0, 0, 0, 0, 0, 0, 0});
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(0).array()); //no name
fs.write(ByteBuffer.allocate(4).order(ord).putInt(9).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(ByteBuffer.allocate(8).order(ord)
.putDouble(data[i].getAt(j)[k]).array());
}
}
}
fs.flush();
fs.close();
//END
}
public void writeSubset(ECGDataSet[] data, int start, int end, int offset)
throws IOException {
int n = end-start; //# of data points
int m = data.length; //# of channels
//calculating matrix sizes
int c = 56;
int b = 40 + (8 + c)*n*2;
int a = 48 + (8 + b)*m;
ByteOrder ord = ByteOrder.nativeOrder();
//descriptive text
Date now = new Date();
fs.write(pad("MATLAB 5.0 MAT-file, Created on: " + now.toString(),
116,
' ').getBytes(),
0,
116);
//flags? - not important
fs.write(new byte[]{0, 0, 0, 0, 0, 0, 0, 0});
//version - default
fs.write(new byte[]{0, 1});
//endian indicator - little
fs.write("IM".getBytes());
//////Start channel arrays (Cell Array)///////////
// miMATRIX
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
//size of matrix in bytes
fs.write(ByteBuffer.allocate(4).order(ord).putInt(a).array());
//HEADER of channel arrays miUINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
// mxCELL_CLASS
fs.write(new byte[]{1, 0, 0, 0, 0, 0, 0, 0});
// miINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
//write matrix size
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(m).array());
//name miINT8
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write("leads".getBytes());
fs.write(new byte[]{0, 0, 0}); //padding
//END HEADER
for(int i = 0; i < m; i++) {
//////////Start channel array (Double Array)////////
// miMATRIX
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
//size of the matrix
fs.write(ByteBuffer.allocate(4).order(ord).putInt(b).array());
//HEADER of channel array
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(new byte[]{1, 0, 0, 0, 0, 0, 0, 0});
// miINT32
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
//write matrix size
fs.write(ByteBuffer.allocate(4).order(ord).putInt(2).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(n).array());
//name miINT8
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(0).array()); //no name
//END HEADER
for(int j = 0; j < n; j++) {
for(int k = 0; k < 2; k++) {
fs.write(ByteBuffer.allocate(4).order(ord).putInt(14).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(c).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(6).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(new byte[]{6, 0, 0, 0, 0, 0, 0, 0});
fs.write(ByteBuffer.allocate(4).order(ord).putInt(5).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(1).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(0).array()); //no name
fs.write(ByteBuffer.allocate(4).order(ord).putInt(9).array());
fs.write(ByteBuffer.allocate(4).order(ord).putInt(8).array());
fs.write(ByteBuffer.allocate(8).order(ord)
.putDouble(data[i].getAt(j)[k]).array());
}
}
}
fs.flush();
fs.close();
//END
}
}