From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Brown Subject: Re: [pulseaudio-discuss] alsa ucm in pulseaudio Date: Fri, 14 Oct 2011 12:35:06 +0100 Message-ID: <20111014113506.GD2966@opensource.wolfsonmicro.com> References: <4E97D81E.4080607@canonical.com> <4E97F964.4080701@canonical.com> <20111014093959.GA2966@opensource.wolfsonmicro.com> <4E980856.4040507@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from opensource.wolfsonmicro.com (opensource.wolfsonmicro.com [80.75.67.52]) by alsa0.perex.cz (Postfix) with ESMTP id D12B61037F3 for ; Fri, 14 Oct 2011 13:35:08 +0200 (CEST) Content-Disposition: inline In-Reply-To: <4E980856.4040507@canonical.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: David Henningsson Cc: alsa-devel@alsa-project.org, linaro-dev@lists.linaro.org, General PulseAudio Discussion , Colin Guthrie , Feng Wei , Liam Girdwood List-Id: alsa-devel@alsa-project.org On Fri, Oct 14, 2011 at 12:00:54PM +0200, David Henningsson wrote: > On 10/14/2011 11:39 AM, Mark Brown wrote: > >On Fri, Oct 14, 2011 at 10:57:08AM +0200, David Henningsson wrote: > >>As for ports, this again depends on what is mutually exclusive and > >>what could be used in parallel, I vaguely remember "Modifiers" as > >>something that could be used in parallel with existing streams, if > >>so, they need to be separate sinks/sources. > >Modifiers and Devices can both be used concurrently. > Modifiers, if any? E g, would UCM allow for three active Devices and > four active Modifiers, all resulting in seven independent PCM > streams running concurrently? Or are there constraints in that e g > all Devices and/or Modifiers must share the same PCM stream? There can be more than one PCM stream but there needn't be a PCM stream per device (and that would fail to reflect what hardware can actually implement).