This file is indexed.

/usr/share/gtk-doc/html/gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstpbutilsinstallplugins.html is in gstreamer0.10-plugins-base-doc 0.10.36-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>gstpbutilsinstallplugins</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 0.10 Library Reference Manual">
<link rel="up" href="gstreamer-base-utils.html" title="Base Utils Library">
<link rel="prev" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html" title="gstpbutilsmissingplugins">
<link rel="next" href="gst-plugins-base-libs-gstdiscoverer.html" title="gstdiscoverer">
<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="gstreamer-base-utils.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">GStreamer Base Plugins 0.10 Library Reference Manual</th>
<td><a accesskey="n" href="gst-plugins-base-libs-gstdiscoverer.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#gst-plugins-base-libs-gstpbutilsinstallplugins.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#gst-plugins-base-libs-gstpbutilsinstallplugins.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstpbutilsinstallplugins"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstpbutilsinstallplugins.top_of_page"></a>gstpbutilsinstallplugins</span></h2>
<p>gstpbutilsinstallplugins — Missing plugin installation support for applications</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstpbutilsinstallplugins.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;gst/pbutils/install-plugins.h&gt;

enum                <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn">GstInstallPluginsReturn</a>;
<span class="returnvalue">void</span>                (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsResultFunc" title="GstInstallPluginsResultFunc ()">*GstInstallPluginsResultFunc</a>)      (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="type">GstInstallPluginsReturn</span></a> result</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="returnvalue">GstInstallPluginsReturn</span></a> <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()">gst_install_plugins_async</a>       (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **details</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsResultFunc" title="GstInstallPluginsResultFunc ()"><span class="type">GstInstallPluginsResultFunc</span></a> func</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="returnvalue">GstInstallPluginsReturn</span></a> <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-sync" title="gst_install_plugins_sync ()">gst_install_plugins_sync</a>        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **details</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>);
const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-return-get-name" title="gst_install_plugins_return_get_name ()">gst_install_plugins_return_get_name</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="type">GstInstallPluginsReturn</span></a> ret</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-installation-in-progress" title="gst_install_plugins_installation_in_progress ()">gst_install_plugins_installation_in_progress</a>
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-supported" title="gst_install_plugins_supported ()">gst_install_plugins_supported</a>       (<em class="parameter"><code><span class="type">void</span></code></em>);

                    <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext">GstInstallPluginsContext</a>;
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="returnvalue">GstInstallPluginsContext</span></a> * <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-context-new" title="gst_install_plugins_context_new ()">gst_install_plugins_context_new</a>
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-context-free" title="gst_install_plugins_context_free ()">gst_install_plugins_context_free</a>    (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-context-set-xid" title="gst_install_plugins_context_set_xid ()">gst_install_plugins_context_set_xid</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> xid</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstpbutilsinstallplugins.description"></a><h2>Description</h2>
<p>
</p>
<div class="refsect2">
<a name="idp25467280"></a><h3>Overview</h3>
<p>
Using this API, applications can request the installation of missing
GStreamer plugins. These may be missing decoders/demuxers or encoders/muxers
for a certain format, sources or sinks for a certain URI protocol
(e.g. 'http'), or certain elements known by their element factory name
('audioresample').
</p>
<p>
Whether plugin installation is supported or not depends on the operating
system and/or distribution in question. The vendor of the operating system
needs to make sure the necessary hooks and mechanisms are in place for
plugin installation to work. See below for more detailed information.
</p>
<p>
From the application perspective, plugin installation is usually triggered
either
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
when the application itself has found that it wants or needs to install a
certain element
</p></li>
<li class="listitem"><p>
when the application has been notified by an element (such as playbin or
decodebin) that one or more plugins are missing <span class="emphasis"><em>and</em></span>
the application has decided that it wants to install one or more of those
missing plugins
</p></li>
</ul></div>
<p>
</p>
<p>
The install functions in this section all take one or more 'detail strings'.
These detail strings contain information about the type of plugin that
needs to be installed (decoder, encoder, source, sink, or named element),
and some additional information such GStreamer version used and a
human-readable description of the component to install for user dialogs.
</p>
<p>
Applications should not concern themselves with the composition of the
string itself. They should regard the string as if it was a shared secret
between GStreamer and the plugin installer application.
</p>
<p>
Detail strings can be obtained using the function
<a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-installer-detail" title="gst_missing_plugin_message_get_installer_detail ()"><code class="function">gst_missing_plugin_message_get_installer_detail()</code></a> on a missing-plugin
message. Such a message will either have been found by the application on
a pipeline's <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstBus.html"><span class="type">GstBus</span></a>, or the application will have created it itself using
<a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-element-message-new" title="gst_missing_element_message_new ()"><code class="function">gst_missing_element_message_new()</code></a>, <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-decoder-message-new" title="gst_missing_decoder_message_new ()"><code class="function">gst_missing_decoder_message_new()</code></a>,
<a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-encoder-message-new" title="gst_missing_encoder_message_new ()"><code class="function">gst_missing_encoder_message_new()</code></a>, <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-uri-sink-message-new" title="gst_missing_uri_sink_message_new ()"><code class="function">gst_missing_uri_sink_message_new()</code></a>, or
<a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-uri-source-message-new" title="gst_missing_uri_source_message_new ()"><code class="function">gst_missing_uri_source_message_new()</code></a>.
</p>
<p>
For each GStreamer element/plugin/component that should be installed, the
application needs one of those 'installer detail' string mentioned in the
previous section. This string can be obtained, as already mentioned above,
from a missing-plugin message using the function
<a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-installer-detail" title="gst_missing_plugin_message_get_installer_detail ()"><code class="function">gst_missing_plugin_message_get_installer_detail()</code></a>. The missing-plugin
message is either posted by another element and then found on the bus
by the application, or the application has created it itself as described
above.
</p>
<p>
The application will then call <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a>, passing a
NULL-terminated array of installer detail strings, and a function that
should be called when the installation of the plugins has finished
(successfully or not). Optionally, a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> created
with <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-context-new" title="gst_install_plugins_context_new ()"><code class="function">gst_install_plugins_context_new()</code></a> may be passed as well. This way
additional optional arguments like the application window's XID can be
passed to the external installer application.
</p>
<p>
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a> will return almost immediately, with the
return code indicating whether plugin installation was started or not.
If the necessary hooks for plugin installation are in place and an
external installer application has in fact been called, the passed in
function will be called with a result code as soon as the external installer
has finished. If the result code indicates that new plugins have been
installed, the application will want to call <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-Gst.html#gst-update-registry"><code class="function">gst_update_registry()</code></a> so the
run-time plugin registry is updated and the new plugins are made available
to the application.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>
A Gtk/GLib main loop must be running in order for the result function to
be called when the external installer has finished. If this is not the case,
make sure to regularly call
<pre class="programlisting">
g_main_context_iteration (NULL,FALSE);
</pre>
from your code.
</div>
<p>
</p>
<p>
<span class="emphasis"><em>1. Installer hook</em></span>
</p>
<p>
When GStreamer applications initiate plugin installation via
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a> or <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-sync" title="gst_install_plugins_sync ()"><code class="function">gst_install_plugins_sync()</code></a>, a pre-defined
helper application will be called.
</p>
<p>
The exact path of the helper application to be called is set at compile
time, usually by the <code class="literal">./configure</code> script based on the
install prefix. For a normal package build into the <code class="literal">/usr</code>
prefix, this will usually default to
<code class="filename">/usr/libexec/gst-install-plugins-helper</code> or
<code class="filename">/usr/lib/gst-install-plugins-helper</code>.
</p>
<p>
Vendors/distros who want to support GStreamer plugin installation should
either provide such a helper script/application or use the
<code class="literal">./configure</code> option
<code class="literal">--with-install-plugins-helper=/path/to/installer</code> to
make GStreamer call an installer of their own directly.
</p>
<p>
It is strongly recommended that vendors provide a small helper application
as interlocutor to the real installer though, even more so if command line
argument munging is required to transform the command line arguments
passed by GStreamer to the helper application into arguments that are
understood by the real installer.
</p>
<p>
The helper application path defined at compile time can be overriden at
runtime by setting the <code class="envar">GST_INSTALL_PLUGINS_HELPER</code>
environment variable. This can be useful for testing/debugging purposes.
</p>
<p>
<span class="emphasis"><em>2. Arguments passed to the install helper</em></span>
</p>
<p>
GStreamer will pass the following arguments to the install helper (this is
in addition to the path of the executable itself, which is by convention
argv[0]):
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
   none to many optional arguments in the form of
   <code class="literal">--foo-bar=val</code>. Example:
   <code class="literal">--transient-for=XID</code> where XID is the X Window ID of
   the main window of the calling application (so the installer can make
   itself transient to that window). Unknown optional arguments should
   be ignored by the installer.
 </p></li>
<li class="listitem"><p>
   one 'installer detail string' argument for each plugin to be installed;
   these strings will have a <code class="literal">gstreamer</code> prefix; the
   exact format of the detail string is explained below
 </p></li>
</ul></div>
<p>
</p>
<p>
<span class="emphasis"><em>3. Detail string describing the missing plugin</em></span>
</p>
<p>
The string is in UTF-8 encoding and is made up of several fields, separated
by '|' characters (but neither the first nor the last character is a '|').
The fields are:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<p>
   plugin system identifier, ie. "gstreamer"
  </p>
<p>
   This identifier determines the format of the rest of the detail string.
   Automatic plugin installers should not process detail strings with
   unknown identifiers. This allows other plugin-based libraries to use
   the same mechanism for their automatic plugin installation needs, or
   for the format to be changed should it turn out to be insufficient.
  </p>
</li>
<li class="listitem">
<p>
   plugin system version, e.g. "0.10"
  </p>
<p>
   This is required so that when there is a GStreamer-0.12 or GStreamer-1.0
   at some point in future, the different major versions can still co-exist
   and use the same plugin install mechanism in the same way.
  </p>
</li>
<li class="listitem">
<p>
   application identifier, e.g. "totem"
  </p>
<p>
   This may also be in the form of "pid/12345" if the program name can't
   be obtained for some reason.
  </p>
</li>
<li class="listitem"><p>
   human-readable localised description of the required component,
   e.g. "Vorbis audio decoder"
  </p></li>
<li class="listitem">
<p>
   identifier string for the required component (see below for details about
   how to map this to the package/plugin that needs installing), e.g.
   </p>
<div class="itemizedlist"><ul class="itemizedlist" type="circle">
<li class="listitem"><p>
      urisource-$(PROTOCOL_REQUIRED), e.g. urisource-http or urisource-mms
    </p></li>
<li class="listitem"><p>
      element-$(ELEMENT_REQUIRED), e.g. element-ffmpegcolorspace
    </p></li>
<li class="listitem">
<p>
      decoder-$(CAPS_REQUIRED), e.g. (do read below for more details!):
      </p>
<div class="itemizedlist"><ul class="itemizedlist" type="square">
<li class="listitem"><p>decoder-audio/x-vorbis</p></li>
<li class="listitem"><p>decoder-application/ogg</p></li>
<li class="listitem"><p>decoder-audio/mpeg, mpegversion=(int)4</p></li>
<li class="listitem"><p>decoder-video/mpeg, systemstream=(boolean)true, mpegversion=(int)2</p></li>
</ul></div>
<p>
    </p>
</li>
<li class="listitem"><p>
      encoder-$(CAPS_REQUIRED), e.g. encoder-audio/x-vorbis
    </p></li>
</ul></div>
<p>
  </p>
</li>
<li class="listitem"><p>
    optional further fields not yet specified
  </p></li>
</ul></div>
<p>
</p>
<p>
An entire ID string might then look like this, for example:
<code class="literal">
gstreamer|0.10|totem|Vorbis audio decoder|decoder-audio/x-vorbis
</code>
</p>
<p>
Plugin installers parsing this ID string should expect further fields also
separated by '|' symbols and either ignore them, warn the user, or error
out when encountering them.
</p>
<p>
Those unfamiliar with the GStreamer 'caps' system should note a few things
about the caps string used in the above decoder/encoder case:
  </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
      the first part ("video/mpeg") of the caps string is a GStreamer media
      type and <span class="emphasis"><em>not</em></span> a MIME type. Wherever possible, the
      GStreamer media type will be the same as the corresponding MIME type,
      but often it is not.
    </p></li>
<li class="listitem"><p>
      a caps string may or may not have additional comma-separated fields
      of various types (as seen in the examples above)
    </p></li>
<li class="listitem">
<p>
      the caps string of a 'required' component (as above) will always have
      fields with fixed values, whereas an introspected string (see below)
      may have fields with non-fixed values. Compare for example:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" type="circle">
<li class="listitem"><p>
          <code class="literal">audio/mpeg, mpegversion=(int)4</code> vs.
          <code class="literal">audio/mpeg, mpegversion=(int){2, 4}</code>
        </p></li>
<li class="listitem"><p>
          <code class="literal">video/mpeg, mpegversion=(int)2</code> vs.
          <code class="literal">video/mpeg, systemstream=(boolean){ true, false}, mpegversion=(int)[1, 2]</code>
        </p></li>
</ul></div>
<p>
    </p>
</li>
</ul></div>
<p>
</p>
<p>
<span class="emphasis"><em>4. Exit codes the installer should return</em></span>
</p>
<p>
The installer should return one of the following exit codes when it exits:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
    0 if all of the requested plugins could be installed
    (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-SUCCESS:CAPS"><span class="type">GST_INSTALL_PLUGINS_SUCCESS</span></a>)
  </p></li>
<li class="listitem"><p>
    1 if no appropriate installation candidate for any of the requested
    plugins could be found. Only return this if nothing has been installed
    (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-NOT-FOUND:CAPS"><span class="type">GST_INSTALL_PLUGINS_NOT_FOUND</span></a>)
  </p></li>
<li class="listitem"><p>
    2 if an error occured during the installation. The application will
    assume that the user will already have seen an error message by the
    installer in this case and will usually not show another one
    (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-ERROR:CAPS"><span class="type">GST_INSTALL_PLUGINS_ERROR</span></a>)
  </p></li>
<li class="listitem"><p>
    3 if some of the requested plugins could be installed, but not all
    (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-PARTIAL-SUCCESS:CAPS"><span class="type">GST_INSTALL_PLUGINS_PARTIAL_SUCCESS</span></a>)
  </p></li>
<li class="listitem"><p>
    4 if the user aborted the installation (<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-USER-ABORT:CAPS"><span class="type">GST_INSTALL_PLUGINS_USER_ABORT</span></a>)
  </p></li>
</ul></div>
<p>
</p>
<p>
<span class="emphasis"><em>5. How to map the required detail string to packages</em></span>
</p>
<p>
It is up to the vendor to find mechanism to map required components from
the detail string to the actual packages/plugins to install. This could
be a hardcoded list of mappings, for example, or be part of the packaging
system metadata.
</p>
<p>
GStreamer plugin files can be introspected for this information. The
<code class="literal">gst-inspect</code> utility has a special command line option
that will output information similar to what is required. For example
<span class="command"><strong>
$ gst-inspect-0.10 --print-plugin-auto-install-info /path/to/libgstvorbis.so
</strong></span>
should output something along the lines of
<code class="computeroutput">
decoder-audio/x-vorbis
element-vorbisdec
element-vorbisenc
element-vorbisparse
element-vorbistag
encoder-audio/x-vorbis
</code>
Note that in the encoder and decoder case the introspected caps can be more
complex with additional fields, e.g.
<code class="literal">audio/mpeg,mpegversion=(int){2,4}</code>, so they will not
always exactly match the caps wanted by the application. It is up to the
installer to deal with this (either by doing proper caps intersection using
the GStreamer <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> API, or by only taking into account the media type).
</p>
<p>
Another potential source of problems are plugins such as ladspa or
libvisual where the list of elements depends on the installed
ladspa/libvisual plugins at the time. This is also up to the distribution
to handle (but usually not relevant for playback applications).
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstpbutilsinstallplugins.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstInstallPluginsReturn"></a><h3>enum GstInstallPluginsReturn</h3>
<pre class="programlisting">typedef enum {
  /* Return codes from the installer. Returned by gst_install_plugins_sync(),
   * or passed as result code to your #GstInstallPluginsResultFunc */
  GST_INSTALL_PLUGINS_SUCCESS = 0,
  GST_INSTALL_PLUGINS_NOT_FOUND = 1,
  GST_INSTALL_PLUGINS_ERROR = 2,
  GST_INSTALL_PLUGINS_PARTIAL_SUCCESS = 3,
  GST_INSTALL_PLUGINS_USER_ABORT = 4,

  /* Returned by gst_install_plugins_sync(), or passed as result code to your
   * #GstInstallPluginsResultFunc */
  GST_INSTALL_PLUGINS_CRASHED = 100,
  GST_INSTALL_PLUGINS_INVALID,

  /* Return codes from starting the external helper, may be returned by both
   * gst_install_plugins_sync() and gst_install_plugins_async(), but should
   * never be seen by a #GstInstallPluginsResultFunc */
  GST_INSTALL_PLUGINS_STARTED_OK = 200,
  GST_INSTALL_PLUGINS_INTERNAL_FAILURE,
  GST_INSTALL_PLUGINS_HELPER_MISSING,
  GST_INSTALL_PLUGINS_INSTALL_IN_PROGRESS
} GstInstallPluginsReturn;
</pre>
<p>
Result codes returned by <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a> and
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-sync" title="gst_install_plugins_sync ()"><code class="function">gst_install_plugins_sync()</code></a>, and also the result code passed to the
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsResultFunc" title="GstInstallPluginsResultFunc ()"><span class="type">GstInstallPluginsResultFunc</span></a> specified with <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a>.
</p>
<p>
These codes indicate success or failure of starting an external installer
program and to what extent the requested plugins could be installed.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-SUCCESS:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_SUCCESS</code></span></p></td>
<td>all of the requested plugins could be
    installed
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-NOT-FOUND:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_NOT_FOUND</code></span></p></td>
<td>no appropriate installation candidate for
    any of the requested plugins could be found. Only return this if nothing
    has been installed. Return <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GST-INSTALL-PLUGINS-PARTIAL-SUCCESS:CAPS"><span class="type">GST_INSTALL_PLUGINS_PARTIAL_SUCCESS</span></a> if
    some (but not all) of the requested plugins could be installed.
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-ERROR:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_ERROR</code></span></p></td>
<td>an error occured during the installation. If
    this happens, the  user has already seen an error message and another
    one should not be displayed
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-PARTIAL-SUCCESS:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_PARTIAL_SUCCESS</code></span></p></td>
<td>some of the requested plugins could
    be installed, but not all
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-USER-ABORT:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_USER_ABORT</code></span></p></td>
<td>the user has aborted the installation
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-CRASHED:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_CRASHED</code></span></p></td>
<td>the installer had an unclean exit code
    (ie. death by signal)
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-INVALID:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_INVALID</code></span></p></td>
<td>the helper returned an invalid status code
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-STARTED-OK:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_STARTED_OK</code></span></p></td>
<td>returned by <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a> to
    indicate that everything went fine so far and the provided callback
    will be called with the result of the installation later
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-INTERNAL-FAILURE:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_INTERNAL_FAILURE</code></span></p></td>
<td>some internal failure has
    occured when trying to start the installer
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-HELPER-MISSING:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_HELPER_MISSING</code></span></p></td>
<td>the helper script to call the
    actual installer is not installed
</td>
</tr>
<tr>
<td><p><a name="GST-INSTALL-PLUGINS-INSTALL-IN-PROGRESS:CAPS"></a><span class="term"><code class="literal">GST_INSTALL_PLUGINS_INSTALL_IN_PROGRESS</code></span></p></td>
<td>a previously-started plugin
    installation is still in progress, try again later
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="GstInstallPluginsResultFunc"></a><h3>GstInstallPluginsResultFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                (*GstInstallPluginsResultFunc)      (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="type">GstInstallPluginsReturn</span></a> result</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
The prototype of the callback function that will be called once the
external plugin installer program has returned. You only need to provide
a callback function if you are using the asynchronous interface.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>whether the installation of the requested plugins succeeded or not</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>the user data passed to <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-async"></a><h3>gst_install_plugins_async ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="returnvalue">GstInstallPluginsReturn</span></a> gst_install_plugins_async       (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **details</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsResultFunc" title="GstInstallPluginsResultFunc ()"><span class="type">GstInstallPluginsResultFunc</span></a> func</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
Requests plugin installation without blocking. Once the plugins have been
installed or installation has failed, <em class="parameter"><code>func</code></em> will be called with the result
of the installation and your provided <em class="parameter"><code>user_data</code></em> pointer.
</p>
<p>
This function requires a running GLib/Gtk main loop. If you are not
running a GLib/Gtk main loop, make sure to regularly call
g_main_context_iteration(NULL,FALSE).
</p>
<p>
The installer strings that make up <em class="parameter"><code>detail</code></em> are typically obtained by
calling <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-installer-detail" title="gst_missing_plugin_message_get_installer_detail ()"><code class="function">gst_missing_plugin_message_get_installer_detail()</code></a> on missing-plugin
messages that have been caught on a pipeline's bus or created by the
application via the provided API, such as <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-element-message-new" title="gst_missing_element_message_new ()"><code class="function">gst_missing_element_message_new()</code></a>.
</p>
<p>
It is possible to request the installation of multiple missing plugins in
one go (as might be required if there is a demuxer for a certain format
installed but no suitable video decoder and no suitable audio decoder).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>details</code></em> :</span></p></td>
<td>NULL-terminated array of installer string details (see below)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>, or NULL</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
<td>the function to call when the installer program returns. <span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>the user data to pass to <em class="parameter"><code>func</code></em> when called, or NULL. <span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>result code whether an external installer could be started</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-sync"></a><h3>gst_install_plugins_sync ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="returnvalue">GstInstallPluginsReturn</span></a> gst_install_plugins_sync        (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **details</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>);</pre>
<p>
Requests plugin installation and block until the plugins have been
installed or installation has failed.
</p>
<p>
This function should almost never be used, it only exists for cases where
a non-GLib main loop is running and the user wants to run it in a separate
thread and marshal the result back asynchronously into the main thread
using the other non-GLib main loop. You should almost always use
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-async" title="gst_install_plugins_async ()"><code class="function">gst_install_plugins_async()</code></a> instead of this function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>details</code></em> :</span></p></td>
<td>NULL-terminated array of installer string details</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>, or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the result of the installation.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-return-get-name"></a><h3>gst_install_plugins_return_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       gst_install_plugins_return_get_name (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsReturn" title="enum GstInstallPluginsReturn"><span class="type">GstInstallPluginsReturn</span></a> ret</code></em>);</pre>
<p>
Convenience function to return the descriptive string associated
with a status code.  This function returns English strings and
should not be used for user messages. It is here only to assist
in debugging.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ret</code></em> :</span></p></td>
<td>the return status code</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a descriptive string for the status code in <em class="parameter"><code>ret</code></em>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-installation-in-progress"></a><h3>gst_install_plugins_installation_in_progress ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gst_install_plugins_installation_in_progress
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Checks whether plugin installation (initiated by this application only)
is currently in progress.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if plugin installation is in progress, otherwise FALSE</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-supported"></a><h3>gst_install_plugins_supported ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>            gst_install_plugins_supported       (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Checks whether plugin installation is likely to be supported by the
current environment. This currently only checks whether the helper script
that is to be provided by the distribution or operating system vendor
exists.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if plugin installation is likely to be supported.</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.15</p>
</div>
<hr>
<div class="refsect2">
<a name="GstInstallPluginsContext"></a><h3>GstInstallPluginsContext</h3>
<pre class="programlisting">typedef struct _GstInstallPluginsContext GstInstallPluginsContext;</pre>
<p>
Opaque context structure for the plugin installation. Use the provided
API to set details on it.
</p>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-context-new"></a><h3>gst_install_plugins_context_new ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="returnvalue">GstInstallPluginsContext</span></a> * gst_install_plugins_context_new
                                                        (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Creates a new <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>. Free with
<a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#gst-install-plugins-context-free" title="gst_install_plugins_context_free ()"><code class="function">gst_install_plugins_context_free()</code></a> when no longer needed</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-context-free"></a><h3>gst_install_plugins_context_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gst_install_plugins_context_free    (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>);</pre>
<p>
Frees a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>
</td>
</tr></tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-install-plugins-context-set-xid"></a><h3>gst_install_plugins_context_set_xid ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gst_install_plugins_context_set_xid (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a> *ctx</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> xid</code></em>);</pre>
<p>
This function is for X11-based applications (such as most Gtk/Qt
applications on linux/unix) only. You can use it to tell the external
installer the XID of your main application window. That way the installer
can make its own window transient to your application window during the
installation.
</p>
<p>
If set, the XID will be passed to the installer via a --transient-for=XID
command line option.
</p>
<p>
Gtk+/Gnome application should be able to obtain the XID of the top-level
window like this:
</p>
<pre class="programlisting">
##include &lt;gtk/gtk.h&gt;
##ifdef GDK_WINDOWING_X11
##include &lt;gdk/gdkx.h&gt;
##endif
...
##ifdef GDK_WINDOWING_X11
  xid = GDK_WINDOW_XWINDOW (GTK_WIDGET (application_window)-&gt;window);
##endif
...
</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>ctx</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstpbutilsinstallplugins.html#GstInstallPluginsContext" title="GstInstallPluginsContext"><span class="type">GstInstallPluginsContext</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>xid</code></em> :</span></p></td>
<td>the XWindow ID (XID) of the top-level application</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 0.10.12</p>
</div>
</div>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.18</div>
</body>
</html>