From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arun Raghavan Subject: Re: [pulseaudio-discuss] idea: a reserve alsa plugin Date: Thu, 02 May 2013 18:07:21 +0530 Message-ID: <1367498241.8766.3.camel@localhost> References: <51824609.30405@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [93.93.135.160]) by alsa0.perex.cz (Postfix) with ESMTP id A9BE526158C for ; Thu, 2 May 2013 14:36:12 +0200 (CEST) In-Reply-To: <51824609.30405@canonical.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: General PulseAudio Discussion Cc: "alsa-devel@alsa-project.org" List-Id: alsa-devel@alsa-project.org On Thu, 2013-05-02 at 12:55 +0200, David Henningsson wrote: > Just had an idea which I'll write down here before I forget it > again...and I'm not saying I'll implement this anytime soon either, but > here goes: > > There is a device reserve protocol between PulseAudio and JACK2 - when > JACK needs the sound card, it'll send a dbus message to PulseAudio and > grab a name in D-Bus. > > However, there are plenty of applications who like to access ALSA > directly, without going through JACK2 or PulseAudio. By making a > "reserve" plugin, we could have this functionality for those apps too. > > In practice, if the app usually opens "plughw:0" or "hw:0", it could > instead open "reserve:plughw:0" or "reserve:hw:0" to also reserve the > device from PulseAudio usage while the device is open. Meanwhile, > PulseAudio is free to use other audio devices (which is not the case > when using e g pasuspender). > > How does that sound? Might be neat to do have desktops set up to do this whenever an ALSA device is opened (that is do it unconditionally when hw:X or plughw:X is opened). -- Arun