Function rsmpeg::ffi::av_buffer_pool_init2

pub unsafe extern "C" fn av_buffer_pool_init2(
    size: i32, 
    opaque: *mut c_void, 
    alloc: Option<unsafe extern "C" fn(*mut c_void, i32) -> *mut AVBufferRef>, 
    pool_free: Option<unsafe extern "C" fn(*mut c_void)>
) -> *mut AVBufferPool