>-----Original Message----- >From: Maarten Bosmans [mailto:mkbosmans at gmail.com] >Sent: Wednesday, March 23, 2011 7:44 PM >To: General PulseAudio Discussion >Cc: Becker, VincentX >Subject: Re: [pulseaudio-discuss] [RFC PATCH] Log PCM samples to files > >2011/3/21 Vincent Becker <vincentx.becker at intel.com>: >> Hi, >> >> I recently created a new PA module (module-log-pcm) which is able to >log PCM samples from any source/sink and its corresponding >outputs/inputs. For testing audio quality, checking signal processing or >verifying the right implementation of a sound device mixed in PA, >application fields are many. > >What is the use case you are specifically interested in? It can just be any use case that is related to audio and Pulseaudio. I am particulary interested to log audio before and after sound algorithms to check that the signal processing has been well applied (or filters). > >> One just needs to give a parameter list depending on what is wished to >be logged. During the process, an audio tree, or parts of it, is probed >and logged for post-treatment purposes. > >I'm sorry if I am being stuped here, but wat can the module do that >you can't with parec from a monitor source? The module does the exact same thing as parec but parec can just log one device at a time but not the inputs and/or outputs. If you wanted to log the whole set of sinks/sources connected to Pulse, you would need to run as many parec commands as there are devices. Not very practical though. With the module you can specify a list of sinks or sources and choose to log the inputs or outputs, thing that is impossible now with Pulseaudio. Ok that needs a modification in the Pulsecore to probe the chunks when they are peeked or pushed but I don't see any other way. > >> For design needs, sources and sinks are designated by "ends" and >source outputs/sink inputs by "ports". > >Why introduce the new terminology here? I think it is confusing for >people that know pulse already. Or is there perhaps some subtle >difference between the pulse concept and your designation for it? Just to group sinks and sources under one word, same for inputs/outputs. It does not exist in Pulseaudio, am I right? So it shouldn't confuse anybody, I hope. > I am pretty sure that this module can be useful, especially when big sets of sinks/sources are present and someone wants to analyze an audio tree part of these sets during a specific use case. Why not ? May be it will create some needs at least.. >Maarten --------------------------------------------------------------------- Intel Corporation SAS (French simplified joint stock company) Registered headquarters: "Les Montalets"- 2, rue de Paris, 92196 Meudon Cedex, France Registration Number: 302 456 199 R.C.S. NANTERRE Capital: 4,572,000 Euros This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
