Function gst_base_src_set_allocator 

pub unsafe extern "C" fn gst_base_src_set_allocator(
    src: *mut GstBaseSrc,
    pool: *mut GstBufferPool,
    allocator: *mut GstAllocator,
    params: *const GstAllocationParams,
) -> gboolean

Available on crate feature v1_30 only.