Event.parseStep

void parseStep(out  gst.types.Format format,  out  ulong  amount,  out  double  rate,  out  bool  flush,  out  bool  intermediate)

Parse the step event.

`format`	a pointer to store the format in
`amount`	a pointer to store the amount in
`rate`	a pointer to store the rate in
`flush`	a pointer to store the flush boolean in
`intermediate`	a pointer to store the intermediate boolean in