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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GstChildProxy</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GStreamer 1.0 Core Reference Manual">
<link rel="up" href="libgstreamer.html" title="GStreamer Core Library">
<link rel="prev" href="gstreamer-GstSample.html" title="GstSample">
<link rel="next" href="GstClock.html" title="GstClock">
<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="gstreamer-GstSample.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="libgstreamer.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 1.0 Core Reference Manual</th>
<td><a accesskey="n" href="GstClock.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#GstChildProxy.synopsis" class="shortcut">Top</a>
|
<a href="#GstChildProxy.description" class="shortcut">Description</a>
|
<a href="#GstChildProxy.object-hierarchy" class="shortcut">Object Hierarchy</a>
|
<a href="#GstChildProxy.prerequisites" class="shortcut">Prerequisites</a>
|
<a href="#GstChildProxy.implementations" class="shortcut">Known Implementations</a>
|
<a href="#GstChildProxy.signals" class="shortcut">Signals</a>
</td></tr>
</table>
<div class="refentry">
<a name="GstChildProxy"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GstChildProxy.top_of_page"></a>GstChildProxy</span></h2>
<p>GstChildProxy — Interface for multi child elements.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GstChildProxy.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/gst.h>
<a class="link" href="GstChildProxy.html#GstChildProxy-struct" title="GstChildProxy">GstChildProxy</a>;
struct <a class="link" href="GstChildProxy.html#GstChildProxyInterface" title="struct GstChildProxyInterface">GstChildProxyInterface</a>;
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="GstChildProxy.html#gst-child-proxy-get-children-count" title="gst_child_proxy_get_children_count ()">gst_child_proxy_get_children_count</a> (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>);
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="returnvalue">GObject</span></a> * <a class="link" href="GstChildProxy.html#gst-child-proxy-get-child-by-name" title="gst_child_proxy_get_child_by_name ()">gst_child_proxy_get_child_by_name</a> (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="returnvalue">GObject</span></a> * <a class="link" href="GstChildProxy.html#gst-child-proxy-get-child-by-index" title="gst_child_proxy_get_child_by_index ()">gst_child_proxy_get_child_by_index</a> (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> index</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstChildProxy.html#gst-child-proxy-lookup" title="gst_child_proxy_lookup ()">gst_child_proxy_lookup</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> **target</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> **pspec</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-get-property" title="gst_child_proxy_get_property ()">gst_child_proxy_get_property</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *value</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-get-valist" title="gst_child_proxy_get_valist ()">gst_child_proxy_get_valist</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-get" title="gst_child_proxy_get ()">gst_child_proxy_get</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code>...</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-set-property" title="gst_child_proxy_set_property ()">gst_child_proxy_set_property</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *value</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-set-valist" title="gst_child_proxy_set_valist ()">gst_child_proxy_set_valist</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-set" title="gst_child_proxy_set ()">gst_child_proxy_set</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code>...</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-child-added" title="gst_child_proxy_child_added ()">gst_child_proxy_child_added</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *child</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstChildProxy.html#gst-child-proxy-child-removed" title="gst_child_proxy_child_removed ()">gst_child_proxy_child_removed</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *child</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GstChildProxy.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GInterface
+----GstChildProxy
</pre>
</div>
<div class="refsect1">
<a name="GstChildProxy.prerequisites"></a><h2>Prerequisites</h2>
<p>
GstChildProxy requires
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>.</p>
</div>
<div class="refsect1">
<a name="GstChildProxy.implementations"></a><h2>Known Implementations</h2>
<p>
GstChildProxy is implemented by
<a class="link" href="GstBin.html" title="GstBin">GstBin</a> and <a class="link" href="GstPipeline.html" title="GstPipeline">GstPipeline</a>.</p>
</div>
<div class="refsect1">
<a name="GstChildProxy.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GstChildProxy.html#GstChildProxy-child-added" title='The "child-added" signal'>child-added</a>" : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
"<a class="link" href="GstChildProxy.html#GstChildProxy-child-removed" title='The "child-removed" signal'>child-removed</a>" : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GstChildProxy.description"></a><h2>Description</h2>
<p>
This interface abstracts handling of property sets for elements with
children. Imagine elements such as mixers or polyphonic generators. They all
have multiple <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> or some kind of voice objects. Another use case are
container elements like <a class="link" href="GstBin.html" title="GstBin"><span class="type">GstBin</span></a>.
The element implementing the interface acts as a parent for those child
objects.
</p>
<p>
By implementing this interface the child properties can be accessed from the
parent element by using <a class="link" href="GstChildProxy.html#gst-child-proxy-get" title="gst_child_proxy_get ()"><code class="function">gst_child_proxy_get()</code></a> and <a class="link" href="GstChildProxy.html#gst-child-proxy-set" title="gst_child_proxy_set ()"><code class="function">gst_child_proxy_set()</code></a>.
</p>
<p>
Property names are written as "child-name::property-name". The whole naming
scheme is recursive. Thus "child1::child2::property" is valid too, if
"child1" and "child2" implement the <a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> interface.
</p>
</div>
<div class="refsect1">
<a name="GstChildProxy.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstChildProxy-struct"></a><h3>GstChildProxy</h3>
<pre class="programlisting">typedef struct _GstChildProxy GstChildProxy;</pre>
<p>
Opaque <a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> data structure.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GstChildProxyInterface"></a><h3>struct GstChildProxyInterface</h3>
<pre class="programlisting">struct GstChildProxyInterface {
GTypeInterface parent;
/* methods */
GObject * (*get_child_by_name) (GstChildProxy * parent, const gchar * name);
GObject * (*get_child_by_index) (GstChildProxy * parent, guint index);
guint (*get_children_count) (GstChildProxy * parent);
};
</pre>
<p>
<a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> interface.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GTypeInterface"><span class="type">GTypeInterface</span></a> <em class="structfield"><code><a name="GstChildProxyInterface.parent"></a>parent</code></em>;</span></p></td>
<td>parent interface type.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstChildProxyInterface.get-child-by-name"></a>get_child_by_name</code></em> ()</span></p></td>
<td>virtual method to fetch the child by name</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstChildProxyInterface.get-child-by-index"></a>get_child_by_index</code></em> ()</span></p></td>
<td>virtual method to fetch the child by index</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstChildProxyInterface.get-children-count"></a>get_children_count</code></em> ()</span></p></td>
<td>virtual method to get the children count</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get-children-count"></a><h3>gst_child_proxy_get_children_count ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_child_proxy_get_children_count (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>);</pre>
<p>
Gets the number of child objects this parent contains.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the number of child objects
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get-child-by-name"></a><h3>gst_child_proxy_get_child_by_name ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="returnvalue">GObject</span></a> * gst_child_proxy_get_child_by_name (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>
Looks up a child element by the given name.
</p>
<p>
This virtual method has a default implementation that uses <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
together with <a class="link" href="GstObject.html#gst-object-get-name" title="gst_object_get_name ()"><code class="function">gst_object_get_name()</code></a>. If the interface is to be used with
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObjects</span></a>, this methods needs to be overridden.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>the parent object to get the child from</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the childs name</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the child object or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if not found. Unref
after usage.
MT safe. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get-child-by-index"></a><h3>gst_child_proxy_get_child_by_index ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="returnvalue">GObject</span></a> * gst_child_proxy_get_child_by_index (<em class="parameter"><code><a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *parent</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> index</code></em>);</pre>
<p>
Fetches a child by its number.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>the parent object to get the child from</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>index</code></em> :</span></p></td>
<td>the childs position in the child list</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the child object or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if not found (index
too high). Unref after usage.
MT safe. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-lookup"></a><h3>gst_child_proxy_lookup ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_child_proxy_lookup (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> **target</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> **pspec</code></em>);</pre>
<p>
Looks up which object and <a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> would be effected by the given <em class="parameter"><code>name</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>object to lookup the property in</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>name of the property to look up</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>target</code></em> :</span></p></td>
<td>pointer to a <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> that
takes the real object to set property on. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pspec</code></em> :</span></p></td>
<td>pointer to take the <a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a>
describing the property. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if <em class="parameter"><code>target</code></em> and <em class="parameter"><code>pspec</code></em> could be found. FALSE otherwise. In that
case the values for <em class="parameter"><code>pspec</code></em> and <em class="parameter"><code>target</code></em> are not modified. Unref <em class="parameter"><code>target</code></em> after
usage.
MT safe.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get-property"></a><h3>gst_child_proxy_get_property ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_get_property (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>
Gets a single property using the GstChildProxy mechanism.
You are responsible for freeing it by calling <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#g-value-unset"><code class="function">g_value_unset()</code></a>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>object to query</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>name of the property</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>a <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> that should take the result. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym> caller-allocates]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get-valist"></a><h3>gst_child_proxy_get_valist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_get_valist (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);</pre>
<p>
Gets properties of the parent object and its children.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object to query</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_property_name</code></em> :</span></p></td>
<td>name of the first property to get</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>var_args</code></em> :</span></p></td>
<td>return location for the first property, followed optionally by more name/return location pairs, followed by NULL</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-get"></a><h3>gst_child_proxy_get ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_get (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Gets properties of the parent object and its children.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_property_name</code></em> :</span></p></td>
<td>name of the first property to get</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>return location for the first property, followed optionally by more name/return location pairs, followed by NULL</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-set-property"></a><h3>gst_child_proxy_set_property ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_set_property (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *value</code></em>);</pre>
<p>
Sets a single property using the GstChildProxy mechanism.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>name of the property to set</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>new <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> for the property</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-set-valist"></a><h3>gst_child_proxy_set_valist ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_set_valist (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);</pre>
<p>
Sets properties of the parent object and its children.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_property_name</code></em> :</span></p></td>
<td>name of the first property to set</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>var_args</code></em> :</span></p></td>
<td>value for the first property, followed optionally by more name/value pairs, followed by NULL</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-set"></a><h3>gst_child_proxy_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_set (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_property_name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Sets properties of the parent object and its children.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_property_name</code></em> :</span></p></td>
<td>name of the first property to set</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>value for the first property, followed optionally by more name/value pairs, followed by NULL</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-child-added"></a><h3>gst_child_proxy_child_added ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_child_added (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *child</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>
Emits the "child-added" signal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>child</code></em> :</span></p></td>
<td>the newly added child</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the new child</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-child-proxy-child-removed"></a><h3>gst_child_proxy_child_removed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_child_proxy_child_removed (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *child</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>
Emits the "child-removed" signal.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the parent object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>child</code></em> :</span></p></td>
<td>the removed child</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the old child</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GstChildProxy.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GstChildProxy-child-added"></a><h3>The <code class="literal">"child-added"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *child_proxy,
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
Will be emitted after the <em class="parameter"><code>object</code></em> was added to the <em class="parameter"><code>child_proxy</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>child_proxy</code></em> :</span></p></td>
<td>the <a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> that was added</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the new child</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstChildProxy-child-removed"></a><h3>The <code class="literal">"child-removed"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a> *child_proxy,
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">Run First</code></a></pre>
<p>
Will be emitted after the <em class="parameter"><code>object</code></em> was removed from the <em class="parameter"><code>child_proxy</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>child_proxy</code></em> :</span></p></td>
<td>the <a class="link" href="GstChildProxy.html" title="GstChildProxy"><span class="type">GstChildProxy</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> that was removed</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the old child</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GstChildProxy.see-also"></a><h2>See Also</h2>
<a class="link" href="GstBin.html" title="GstBin"><span class="type">GstBin</span></a>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.18</div>
</body>
</html>
|
