codec.run { decode() }
            }

            decodeCall == null -> {
                decodeCall = DecodeFrame(null)
                decodeLoop(coroutineContext)
            }

            else -> suspendCoroutine { k ->
                decodeCall = DecodeFrame(k)
            }
        }

    private
    fun WriteContext.encodeLoop(coroutineContext: CoroutineContext) {
        do {