[gstreamer-bugs] [Bug 615615] New: A plugin for audio output using OpenAL

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=615615
  GStreamer | gst-plugins-good | git

           Summary: A plugin for audio output using OpenAL
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: chris.kcat at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=158574)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=158574)
gst-openal plugin source

Wasn't sure which component to use, so apologies if I picked the wrong one.

Here is a plugin I developed to allow output using OpenAL. It relies on the
ALC_EXT_thread_local_context extension, which currently only exists in OpenAL
Soft 1.12. The sink will properly look for this extension and not register
itself if it's not found.

This sink could be very useful for applications which already use OpenAL for
sound, such as games, since it has properties to allow outputing on a specific
opened device or device context. This helps avoid issues such as getting
GStreamer to use the same audio device as the main application, or allowing
concurent access to the sound hardware where such may not be available (however
rare such a problem is these days).

It also lets an application manipulate the OpenAL source object used for
playback, allowing for a good level of integration into the main application
(like placing the output of a media stream into 3D space, or applying audio
effects).

I used gst-template for the plugin build system, and alsasink for the actual
plugin. I ran 'make distclean' before building the tarball, and excluded the
directory I built in and .gitignore.

A very small/minimalist application using the sink and describing its uses can
be found here:
http://kcat.strangesoft.net/gst-openal.cpp

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