Subject: Re: [ecasound] telnet is all you need
From: Kai Vehmanen (k_AT_eca.cx)
Date: Thu Nov 07 2002 - 16:45:02 EET
On Thu, 7 Nov 2002, Mario Lang wrote:
> if only 256 messages are returned with NetECI.
Yes, only messages with loglevel 256 will come through.
> Reason is, in ecasound.el, I use the prompt of ecasound
> to determine when output from a command is finished.
> This is done because I could encounter <256 messages, and
> wouldn't know when to return a value from eci-command.
Actually, after you issue int-output-mode-wellformed, messages from all
loglevels are sent using the wellformed syntax. So you shouldn't need to
rely on getting the command prompt. For instance ecasoundc_sa (the C ECI
impl) treats the command prompt as an invalid message and ignores it.
In ecamonitor, which is modelled after your lisp parser, I've used the
following:
m = re.match('256 ([0-9]{1,5}) (.+)\r\n(.*)\r\n\r\n.*', str, re.MULTILINE | re.S)
... if the above regexp fails, we'll just read more data from the socket
and try again. This is repeated until a valid message is found. We can
further validate the received messages by checking that expected message
length (1st regex subgroup) matches the actual content length (3rd
subgroup).
-- http://www.eca.cx Audio software for Linux!
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