pub unsafe extern "C" fn av_expr_eval(
e: *mut AVExpr,
const_values: *const f64,
opaque: *mut c_void,
) -> f64展开描述
Evaluate a previously parsed expression.
@param e the AVExpr to evaluate @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names @param opaque a pointer which will be passed to all functions from funcs1 and funcs2 @return the value of the expression