gstreamer/docs/manual/appendix-integration.xml
Ronald S. Bultje edcaf2cd4f docs/manual/: Fix playbin/decodebin examples, update docs a bit, mention bus instead of signals in various places, me...
Original commit message from CVS:
* docs/manual/advanced-autoplugging.xml:
* docs/manual/appendix-checklist.xml:
* docs/manual/appendix-integration.xml:
* docs/manual/highlevel-components.xml:
Fix playbin/decodebin examples, update docs a bit, mention bus
instead of signals in various places, mention kmplayer and
kaffeine since they have a working GStreamer backend in the KDE
section.
2005-06-30 12:32:17 +00:00

162 lines
6.1 KiB
XML

<chapter id="chapter-intgration">
<title>Integration</title>
<para>
&GStreamer; tries to integrate closely with operating systems (such
as Linux and UNIX-like operating systems, OS X or Windows) and desktop
environments (such as GNOME or KDE). In this chapter, we'll mention
some specific techniques to integrate your application with your
operating system or desktop environment of choice.
</para>
<sect1 id="section-integration-nix">
<title>Linux and UNIX-like operating systems</title>
<para>
&GStreamer; provides a basic set of elements that are useful when
integrating with Linux or a UNIX-like operating system.
</para>
<itemizedlist>
<listitem>
<para>
For audio input and output, &GStreamer; provides input and
output elements for several audio subsystems. Amongst others,
&GStreamer; includes elements for ALSA (alsasrc, alsamixer,
alsasink), OSS (osssrc, ossmixer, osssink) and Sun audio
(sunaudiosrc, sunaudiomixer, sunaudiosink).
</para>
</listitem>
<listitem>
<para>
For video input, &GStreamer; contains source elements for
Video4linux (v4lsrc, v4lmjpegsrc, v4lelement and v4lmjpegisnk)
and Video4linux2 (v4l2src, v4l2element).
</para>
</listitem>
<listitem>
<para>
For video output, &GStreamer; provides elements for output
to X-windows (ximagesink), Xv-windows (xvimagesink; for
hardware-accelerated video), direct-framebuffer (dfbimagesink)
and openGL image contexts (glsink).
</para>
</listitem>
</itemizedlist>
</sect1>
<sect1 id="section-integration-gnome">
<title>GNOME desktop</title>
<para>
&GStreamer; has been the media backend of the <ulink type="http"
url="http://www.gnome.org/">GNOME</ulink> desktop since GNOME-2.2
onwards. Nowadays, a whole bunch of GNOME applications make use of
&GStreamer; for media-processing, including (but not limited to)
<ulink type="http" url="http://www.rhythmbox.org/">Rhythmbox</ulink>,
<ulink type="http" url="http://www.hadess.net/totem.php3">Totem</ulink>
and <ulink type="http"
url="http://www.burtonini.com/blog/computers/sound-juicer">Sound
Juicer</ulink>.
</para>
<para>
Most of these GNOME applications make use of some specific techniques
to integrate as closely as possible with the GNOME desktop:
</para>
<itemizedlist>
<listitem>
<para>
GNOME applications call <function>gnome_program_init ()</function>
to parse command-line options and initialize the necessary gnome
modules. &GStreamer; applications would normally call
<function>gst_init ()</function> to do the same for GStreamer.
This would mean that only one of the two can parse command-line
options. To work around this issue, &GStreamer; can provide a
<classname>poptOption</classname> array which can be passed to
<function>gnome_program_init ()</function>.
</para>
<programlisting><!-- example-begin gnome.c a -->
#include &lt;gnome.h&gt;
#include &lt;gst/gst.h&gt;
gint
main (gint argc,
gchar *argv[])
{
struct poptOption options[] = {
{NULL, '\0', POPT_ARG_INCLUDE_TABLE, NULL, 0, "GStreamer", NULL},
POPT_TABLEEND
};
/* init GStreamer and GNOME using the GStreamer popt tables */
options[0].arg = (void *) gst_init_get_popt_table ();
gnome_program_init ("my-application", "0.0.1", LIBGNOMEUI_MODULE, argc, argv,
GNOME_PARAM_POPT_TABLE, options,
NULL);
<!-- example-end gnome.c a -->
[..]<!-- example-begin gnome.c b --><!--
return 0;
--><!-- example-end gnome.c b -->
<!-- example-begin gnome.c c -->
}
<!-- example-end gnome.c c --></programlisting>
</listitem>
<listitem>
<para>
GNOME stores the default video and audio sources and sinks in GConf.
&GStreamer; provides a small utility library that can be used to
get the elements from the registry using functions such as
<function>gst_gconf_get_default_video_sink ()</function>. See the
header file (<filename>gst/gconf/gconf.h</filename>) for details.
All GNOME applications are recommended to use those variables.
</para>
</listitem>
<listitem>
<para>
&GStreamer; provides data input/output elements for use with the
GNOME-VFS system. These elements are called <quote>gnomevfssrc</quote>
and <quote>gnomevfssink</quote>.
</para>
</listitem>
</itemizedlist>
</sect1>
<sect1 id="section-integration-kde">
<title>KDE desktop</title>
<para>
&GStreamer; has been proposed for inclusion in KDE-4.0. Currently,
&GStreamer; is included as an optional component, and it's used by
several KDE applications, including <ulink type="http"
url="http://amarok.kde.org/">AmaroK</ulink>, <ulink type="http"
url="http://developer.kde.org/~wheeler/juk.html">JuK</ulink>,
<ulink type="http"
url="http://www.xs4all.nl/~jjvrieze/kmplayer.html">KMPlayer</ulink> and
<ulink type="http"
url="http://kaffeine.sourceforge.net/">Kaffeine</ulink>.
</para>
<para>
Although not yet as complete as the GNOME integration bits, there
are already some KDE integration specifics available. This list will
probably grow as &GStreamer; starts to be used in KDE-4.0:
</para>
<itemizedlist>
<listitem>
<para>
AmaroK contains a kiosrc element, which is a source element that
integrates with the KDE VFS subsystem KIO.
</para>
</listitem>
</itemizedlist>
</sect1>
<sect1 id="section-integration-osx">
<title>OS X</title>
<para>
&GStreamer; provides native video and audio output elements for OS X.
It builds using the standard development tools for OS X.
</para>
</sect1>
<sect1 id="section-integration-win32">
<title>Windows</title>
<para>
&GStreamer; builds using Microsoft Visual C .NET 2003 and using Cygwin.
</para>
</sect1>
</chapter>