bufsize = (conf.bufsize_arg * 1024 / wng->max_chunk_bytes)
* wng->max_chunk_bytes;
audiobuf = para_realloc(audiobuf, bufsize);
bufsize = (conf.bufsize_arg * 1024 / wng->max_chunk_bytes)
* wng->max_chunk_bytes;
audiobuf = para_realloc(audiobuf, bufsize);