Track the presence of user provided functions and their number of occurrences
in a parsed expression.
@param counter a zero-initialized array where the count of each function will be stored
if you passed 5 functions with 2 arguments to av_expr_parse()
then for arg=2 this will use upto 5 entries.
@param size size of array
@param arg number of arguments the counted functions have
@return 0 on success, a negative value indicates that no expression or array was passed
or size was zero
Track the presence of user provided functions and their number of occurrences in a parsed expression.
@param counter a zero-initialized array where the count of each function will be stored if you passed 5 functions with 2 arguments to av_expr_parse() then for arg=2 this will use upto 5 entries. @param size size of array @param arg number of arguments the counted functions have @return 0 on success, a negative value indicates that no expression or array was passed or size was zero