Home modified by Manuel Jander

Manuel Jander — Sun, 28 Jun 2015 12:44:57 -0000

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-Welcome to your wiki!
+Welcome to the PupsAudio wiki!
+-

-This is the default page, edit it as you see fit. To add a new page simply reference it within brackets, e.g.: [SamplePage].
+** Introduction **
+
+The Name PupsAudio derives from PulseAudio, but "Pups" (to fart) denotes that this a less fancy version. In fact the goal of PupsAudio is a drop in replacement for PulseAudio that does nothing else but audio I/O utilizing ALSA. In other words, PupsAudio is a minimal glue between the PulseAudio API and ALSA.
+
+** Implementation aspects **
+
+Many functions are just stubs. The asynchronous API was implemented mostly synchronously, basically not doing anything. This works surprisingly well for some applications.
+The only module which does something in the end is pa_stream. Since callbacks are required for application notifications one pthread is required to poll ALSA events and pass them thru via the registered callbacks. Using ALSA snd_async_add_pcm_handler() unfortunately does not work because threaded applications will get killed by unhandled SIGIO at some unavoidable point in time. I was unable to solve this issue without modifying the application itself, and so this route would not allow to create a drop in replacement. Proprietary application would not work either. Because of that I decided to use the poll() approach.
+The headers under pulse and the linker map file are stolen from PulseAudio 6.0. Some code snippets are taken from ALSA examples.
+
+** Why not just install PulseAudio **
+
+I tried, but it does not work for me. The Problem is the large amount of dependencies which would break a lot of things on my laptop. I also do not like the idea to install something that causes such a huge burden and it provides something I do not want. ALSA in terms of sound is good enough. I just need damn audio I/O, basically a pipe that does nothing.

 The wiki uses [Markdown](/p/pupsaudio/wiki/markdown_syntax/) syntax.

Home modified by Manuel Jander

Manuel Jander — Sun, 28 Jun 2015 11:43:46 -0000

Welcome to your wiki!

This is the default page, edit it as you see fit. To add a new page simply reference it within brackets, e.g.: [SamplePage].

The wiki uses Markdown syntax.

Project Members:

Manuel Jander (admin)

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Home modified by Manuel Jander

Home modified by Manuel Jander

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