Difference between revisions of "AnyWave:BuildReader"
(→AwReaderPlugin and AwFileReader classes) |
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Here are the two classes, described within one header file: | Here are the two classes, described within one header file: | ||
<syntaxhighlight lang="C++"> | <syntaxhighlight lang="C++"> | ||
| + | #ifndef DESREADER_H | ||
| + | #define DESREADER_H | ||
| + | |||
| + | #include <AwReaderInterface.h> | ||
| + | #include <QtCore> | ||
| + | #include <QDataStream> | ||
| + | |||
| + | class ADesReader : public AwFileReader | ||
| + | { | ||
| + | Q_OBJECT | ||
| + | Q_INTERFACES(AwFileReader) | ||
| + | public: | ||
| + | ADesReader(const QString& filename); | ||
| + | ~ADesReader() { cleanUpAndClose(); } | ||
| + | |||
| + | long readDataFromChannels(float start, float duration, QList<AwChannel *> &channelList); | ||
| + | FileStatus openFile(const QString &path); | ||
| + | FileStatus canRead(const QString &path); | ||
| + | |||
| + | void cleanUpAndClose(); | ||
| + | private: | ||
| + | QFile m_headerFile; | ||
| + | QFile m_binFile; | ||
| + | QTextStream m_headerStream; | ||
| + | QDataStream m_binStream; | ||
| + | float m_samplingRate; | ||
| + | int m_nSamples; | ||
| + | QString m_binPath; | ||
| + | }; | ||
| + | |||
| + | class ADesReaderPlugin : public AwReaderPlugin | ||
| + | { | ||
| + | Q_OBJECT | ||
| + | Q_INTERFACES(AwReaderPlugin) | ||
| + | public: | ||
| + | ADesReaderPlugin(); | ||
| + | ADesReader *newInstance(const QString& filename) { return new ADesReader(filename); } | ||
| + | }; | ||
| + | |||
| + | #endif // DESREADER_H | ||
| + | |||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 11:40, 23 March 2015
One important thing with AnyWave is to be able to read a data file.
Although that AnyWave is able to read some common EEG or MEG file formats, you might need to read a particular data file.
The only way to achieve that is to build a Reader plug-in for AnyWave.
This will require implementing a C++ plug-in using the SDK.
See the previous sections of the Developer's corner to see how to build the SDK and use it to build a new plug-in.
Let's start with the basic cmake project that we will modify to suit our needs.
ADES reader as example
AnyWave is able to read .ades file format which is a simple file format built upon a text header file and a binary data file.
This 'plug-in' is embedded within AnyWave but we are going to implement it as an external plug-in, for the sake of demonstration.
Define the C++ classes
A C++ plug-in is defined by two classes:
- A class that describes the plug-in to AnyWave.
- A class that describes the core mechanism of the plug-in.
That is true for all kind of plug-ins in AnyWave.
AwReaderPlugin and AwFileReader classes
As mentioned above, two C++ classes must be described and implemented to build a Reader plug-in.
Here are the two classes, described within one header file:
Invalid language.
You need to specify a language like this: <source lang="html4strict">...</source>
Supported languages for syntax highlighting:
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#ifndef DESREADER_H
#define DESREADER_H
#include <AwReaderInterface.h>
#include <QtCore>
#include <QDataStream>
class ADesReader : public AwFileReader
{
Q_OBJECT
Q_INTERFACES(AwFileReader)
public:
ADesReader(const QString& filename);
~ADesReader() { cleanUpAndClose(); }
long readDataFromChannels(float start, float duration, QList<AwChannel *> &channelList);
FileStatus openFile(const QString &path);
FileStatus canRead(const QString &path);
void cleanUpAndClose();
private:
QFile m_headerFile;
QFile m_binFile;
QTextStream m_headerStream;
QDataStream m_binStream;
float m_samplingRate;
int m_nSamples;
QString m_binPath;
};
class ADesReaderPlugin : public AwReaderPlugin
{
Q_OBJECT
Q_INTERFACES(AwReaderPlugin)
public:
ADesReaderPlugin();
ADesReader *newInstance(const QString& filename) { return new ADesReader(filename); }
};
#endif // DESREADER_H
