Class SCPECG
- java.lang.Object
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- com.pixelmed.scpecg.SCPECG
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public class SCPECG extends java.lang.Object
A class to encapsulate an entire SCP-ECG object.
Typically this class would be used to read an SCP-ECG object from a file, and to do something with the decompressed waveform data values. For example:
try { BinaryInputStream i = new BinaryInputStream(new BufferedInputStream(new FileInputStream(arg[0])),false); // always little endian SCPECG scpecg = new SCPECG(i,verbose); short[][] data = scpecg.getDecompressedRhythmData(); BinaryOutputStream o = new BinaryOutputStream(new BufferedOutputStream(new FileOutputStream(arg[1])),false); // little endian // write interleaved raw little endian data int numberOfChannels = data.length; int nSamplesPerChannel = data[0].length; // assume all the same for (int sample=0; sample<nSamplesPerChannel; ++sample) { for (int lead=0;lead<numberOfChannels; ++lead) { o.writeSigned16(data[lead][sample]); } } o.close(); } catch (Exception e) { e.printStackTrace(System.err); }
One might want to dump the entire contents of the instance as a string, as follows:
System.err.print(scpecg);
or perhaps to display the contents as a JTree:
ApplicationFrame af = new ApplicationFrame(); JScrollPane scrollPane = new JScrollPane(); SCPTreeBrowser browser = new SCPTreeBrowser(scpecg,scrollPane); af.getContentPane().add(scrollPane); af.pack(); af.setVisible(true);
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Constructor Summary
Constructors Constructor Description SCPECG(BinaryInputStream i, boolean verbose)
Read an SCP-ECG object from an input stream.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description short[][]
getDecompressedReferenceBeatData()
Get the decompressed reference beat data.short[][]
getDecompressedRhythmData()
Get the decompressed rhythm data.int
getDecompressedRhythmDataSampleTimeInterval()
Get the sample time interval that will be applicable to the decompressed rhythm data.java.lang.String[]
getLeadNames()
Get the names of the leads from Section 3.int[]
getLeadNumbers()
Get the numbers of the leads from Section 3.java.lang.String
getNamedField(java.lang.String fieldName)
Get the concatenated values of all the occurences of a named field from Section 1 as aString
.int
getNumberOfLeads()
Get the number of leads.long[]
getNumbersOfSamples()
Get the number of samples for each lead.Section1
getSection1()
Section10
getSection10()
Section8Or11
getSection11()
Section2
getSection2()
Section3
getSection3()
Section4
getSection4()
Section5Or6
getSection5()
Section5Or6
getSection6()
Section7
getSection7()
Section8Or11
getSection8()
java.util.Iterator
getSectionIterator()
Get anIterator
over all the sections.static void
main(java.lang.String[] arg)
For testing.java.lang.String
toString()
Dump the object as aString
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Constructor Detail
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SCPECG
public SCPECG(BinaryInputStream i, boolean verbose) throws java.io.IOException
Read an SCP-ECG object from an input stream.
As errors are encountered, they are described on
stderr
.The sections are also validated as they are read, and Section 0 is validated against the other sections.
- Parameters:
i
- the input stream (should have been opened as little endian)verbose
- if true, then the progress of the read is described- Throws:
java.io.IOException
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Method Detail
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getDecompressedRhythmData
public short[][] getDecompressedRhythmData()
Get the decompressed rhythm data.
This includes undecimating and adding in any reference beat.
Note that interpolation and filtering are NOT applied in the current implementation.
- Returns:
- arrays of samples for each lead
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getDecompressedReferenceBeatData
public short[][] getDecompressedReferenceBeatData()
Get the decompressed reference beat data.
- Returns:
- arrays of samples for each lead
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toString
public java.lang.String toString()
Dump the object as a
String
.- Overrides:
toString
in classjava.lang.Object
- Returns:
- the object as a
String
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getSection1
public Section1 getSection1()
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getSection2
public Section2 getSection2()
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getSection3
public Section3 getSection3()
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getSection4
public Section4 getSection4()
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getSection5
public Section5Or6 getSection5()
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getSection6
public Section5Or6 getSection6()
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getSection7
public Section7 getSection7()
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getSection8
public Section8Or11 getSection8()
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getSection10
public Section10 getSection10()
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getSection11
public Section8Or11 getSection11()
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getNumberOfLeads
public int getNumberOfLeads()
Get the number of leads.
- Returns:
- the number of leads
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getNumbersOfSamples
public long[] getNumbersOfSamples()
Get the number of samples for each lead.
- Returns:
- an array of the number of samples for each lead
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getDecompressedRhythmDataSampleTimeInterval
public int getDecompressedRhythmDataSampleTimeInterval()
Get the sample time interval that will be applicable to the decompressed rhythm data.
Note that this is the value after undecimation if the rhythm data was decimated; specifically in such cases it will be the sample time interval of the reference beat.
- Returns:
- the sample time interval in microSeconds
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getNamedField
public java.lang.String getNamedField(java.lang.String fieldName)
Get the concatenated values of all the occurences of a named field from Section 1 as a
String
.- Returns:
- the values as a
String
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getLeadNames
public java.lang.String[] getLeadNames()
Get the names of the leads from Section 3.
- Returns:
- the names of the leads
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getLeadNumbers
public int[] getLeadNumbers()
Get the numbers of the leads from Section 3.
- Returns:
- the numbers of the leads (using the codes in the standard and encoded in the data)
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getSectionIterator
public java.util.Iterator getSectionIterator()
Get an
Iterator
over all the sections.- Returns:
- an iterator of objects of type
Section
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main
public static void main(java.lang.String[] arg)
For testing.
- Parameters:
arg
- one, two or three arguments, the input filename, optionally a output raw data filename, and optionally a text dump filename
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