Function rsmpeg::ffi::av_opt_is_set_to_default

pub unsafe extern "C" fn av_opt_is_set_to_default(
    obj: *mut c_void, 
    o: *const AVOption
) -> i32

Check if given option is set to its default value.

Options o must belong to the obj. This function must not be called to check child’s options state. @see av_opt_is_set_to_default_by_name().

@param obj AVClass object to check option on @param o option to be checked @return >0 when option is set to its default, 0 when option is not set its default, <0 on error