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>3.3. Examining the Basic Code</A
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> First we will examine the code you would be likely to place in a header
file (although since the interface to the code is entirely defined by the
pluging system, and doesn't depend on reading a header file, this is not
crucial.)
The code here can be found in
<TT
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>examples/pwg/examplefilter/boiler/gstexamplefilter.h</TT
>.
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>Example 3-1. Example Plugin Header File</B
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> /* Definition of structure storing data for this element. */
typedef struct _GstExample GstExample;
struct _GstExample {
GstElement element;
GstPad *sinkpad, *srcpad;
gboolean silent;
};
/* Standard definition defining a class for this element. */
typedef struct _GstExampleClass GstExampleClass;
struct _GstExampleClass {
GstElementClass parent_class;
};
/* Standard macros for defining types for this element. */
#define GST_TYPE_EXAMPLE \
(gst_example_get_type())
#define GST_EXAMPLE(obj) \
(GTK_CHECK_CAST((obj),GST_TYPE_EXAMPLE,GstExample))
#define GST_EXAMPLE_CLASS(klass) \
(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample))
#define GST_IS_EXAMPLE(obj) \
(GTK_CHECK_TYPE((obj),GST_TYPE_EXAMPLE))
#define GST_IS_EXAMPLE_CLASS(obj) \
(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE))
/* Standard function returning type information. */
GType gst_example_get_type (void);
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