From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Bomers Subject: Re: snd_pcm_hw_params_current() ? Date: Fri, 04 Oct 2002 11:04:23 -0700 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3D9DD827.B4C02E22@sun.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: ALSA devel List-Id: alsa-devel@alsa-project.org Jaroslav Kysela wrote: > > On Thu, 3 Oct 2002, Florian Bomers wrote: > > > Hi, > > > > there is snd_pcm_sw_params_current() but not snd_pcm_hw_params_current(). How > > can I get the current hardware configuration for a given snd_pcm_t handle ? Am I > > missing something ? > > Hardware parameters must be configured from application all time. So that means that I need to cache hw params if I ever want to use them again ? E.g. my app does this: open(), set hw params, set sw params free hw params and sw params to save memory work with the device: start/write/stop/etc. When I now want to know the buffer size, I would like to obtain the current hw params which I had set above to the pcm handle. I understand that I initially need to set hw params to a pcm handle before I could get current hw params, but once I did that, especially in prepared/running state, the device has well-defined hw params and why shouldn't people be allowed to query them ? Thanks ! Florian > > Jaroslav > > ----- > Jaroslav Kysela > Linux Kernel Sound Maintainer > ALSA Project http://www.alsa-project.org > SuSE Linux http://www.suse.com > > ------------------------------------------------------- > This sf.net email is sponsored by:ThinkGeek > Welcome to geek heaven. > http://thinkgeek.com/sf > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-devel -- Florian Bomers Java Sound Java Software/Sun Microsystems, Inc. http://java.sun.com/products/java-media/sound/ ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf