Create Built-in Interval Predicates

Returns external pointers to pre-compiled predicates for common filtering tasks. Use these instead of compiling your own for simple cases.

Usage

get_interval_predicate(type, threshold = 0)

Arguments

type

Predicate type: "non_empty", "min_duration", "max_duration"

threshold

Numeric threshold (for duration predicates)

Value

External pointer to predicate function

Details

Available predicates: - "non_empty": Matches intervals with non-empty labels (label[0] != '\0') - "min_duration": Matches intervals with duration >= threshold - "max_duration": Matches intervals with duration <= threshold

Examples

tg <- TextGrid$create(0, 1, "words")
tg$insert_boundary(1, 0.5)
tg$set_interval_text(1, 2, "hello")

# Get all non-empty intervals
pred <- get_interval_predicate("non_empty")
result <- textgrid_filter_xptr(tg$.xptr, 1, pred)

# Get intervals longer than 100ms
pred <- get_interval_predicate("min_duration", 0.1)
result <- textgrid_filter_xptr(tg$.xptr, 1, pred)