Re: [LAU] [ANN] lash_wrap - A small LASH wrapper

Message: 5 Date: Thu, 26 Jul 2007 00:14:47 +0200 From: Florian Schmidt <mista.tapas(a)gmx.net> Subject: [LAU] [ANN] lash_wrap - A small LASH wrapper To: linux-audio-dev(a)lists.linuxaudio.org Cc: A list for linux audio users         <linux-audio-user(a)lists.linuxaudio.org> Message-ID: <200707260014.47956.mista.tapas(a)gmx.net> Content-Type: text/plain;  charset="us-ascii" Hi, i planned to write this for quite a while and finally got to it [though it's not 100% working yet - It's a small program. If experienced unix hackers might look over y use of waitpit i'd be happy :)]: lash_wrap It's a small program which can be used to "smuggle" non LASH apps into a LASH session provided they meet some requirements: - If they are jack clients, there must be a way of determining the jack client name at startup time - If they are ALSA seq clients the client ID must be known at client startup time or their alsa seq name must be uniquely determined - They must require a way to specify their state via the commandline (e.g. we can tell ardour to load a certain ardour session at startup) So here's how i would smuggle ardour2 into a LASH session: lash_wrap -j ardour -- ardour2 ~/sound/ardour/brazil/brazil.ardour The -j [--jack-name] option tells lash_wrap it must register the jack name "ardour" with LASH. the "--" seperates the options for lash_wrap from the commandline to start the program in question. If we wanted also all ALSA SEQ connections of ardour to be restored we could do: lash_wrap -a ardour -j ardour -- ardour2 ~/sound/ardour/brazil/brazil.ardour The -a [--alsa-name] option specifies a name which will be used to find out the client ID of ardour by regularly searching all ALSA clients until one named "ardour" is found. This ID is then passed to LASH. CAUTION!!!! YOU MIGHT LOSE WORK!! READ ON: - lash_wrap does not care for saving the state of the app in question. So before hitting "close" in your favourite LASH session handler, be sure to save the session in e.g. ardour manually. - if the passed jack or alsa client names do not match for whatever reasons, then connections won't be restored properly. You have been warned. Nonetheless this might be useful for people who otherwise use scripts to manage their audio sessions.