lsl_resolve_bypred function

@Native<NativeLsl_resolve_bypred>() int lsl_resolve_bypred(Pointer<lsl_streaminfo> buffer, int buffer_elements, Pointer<Char> pred, int minimum, double timeout,)

Resolve all streams that match a given predicate.

Advanced query that allows to impose more conditions on the retrieved streams; the given string is an XPath 1.0 predicate for the <info> node (omitting the surrounding []'s) @paramout buffer A user-allocated buffer to hold the resolve results. @attention It is the user's responsibility to either destroy the resulting streaminfo objects or to pass them back to the LSL during during creation of an inlet.

@attention The stream_info's returned by the resolver are only short versions that do not include the lsl_get_desc() field (which can be arbitrarily big). To obtain the full stream information you need to call lsl_get_info() on the inlet after you have created one. @param buffer_elements The user-provided buffer length. @param pred The predicate string, e.g. name='BioSemi' or type='EEG' and starts-with(name,'BioSemi') and count(info/desc/channel)=32 @param minimum Return at least this number of streams. @param timeout Optionally a timeout of the operation, in seconds (default: no timeout). If the timeout expires, less than the desired number of streams (possibly none) will be returned. @return The number of results written into the buffer (never more than the provided # of slots) or a negative number if an error has occurred (values corresponding to lsl_error_code_t).

Implementation

@ffi.Native<NativeLsl_resolve_bypred>()
external int lsl_resolve_bypred(
  ffi.Pointer<lsl_streaminfo> buffer,
  int buffer_elements,
  ffi.Pointer<ffi.Char> pred,
  int minimum,
  double timeout,
);