blob: 69fe1c04c1ce5176b9bc912f921f2b06b741eff8 (
plain)
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
|
<!-- ##### SECTION Title ##### -->
GstBin
<!-- ##### SECTION Short_Description ##### -->
Base class for elements that contain other elements
<!-- ##### SECTION Long_Description ##### -->
<para>
GstBin is the simplest of the container elements, allowing elements to
become children of itself. Pads from the child elements can be ghosted to
the bin, making the bin itself look transparently like any other element,
allowing for deep nesting of predefined sub-pipelines.
</para>
<para>
A new GstBin is created with gst_bin_new(). Use a #GstPipeline instead if you want
to create a toplevel bin because a normal bin doesn't have a scheduler of its
own.
</para>
<para>
After the bin has been created you will typically add elements to it with
gst_bin_add(). You can remove elements with gst_bin_remove().
</para>
<para>
An element can be retrieved from a bin with gst_bin_get_by_name(), using the
elements name. gst_bin_get_by_name_recurse_up() is mainly used for internal
purposes and will query the parent bins when the element is not found in the
current bin.
</para>
<para>
The list of elements in a bin can be retrieved with gst_bin_get_list().
</para>
<para>
After the bin has been set to the PLAYING state (with gst_element_set_state()),
gst_bin_iterate() is used to process the elements in the bin.
</para>
<para>
The "element_added" signal is fired whenever a new element is added to the bin.
</para>
<para>
The "element_removed" signal is fired whenever an element is removed from the bin.
</para>
<para>
gst_bin_destroy() is used to destroy the bin.
</para>
<para>
To control the selection of the clock in a bin, you can use the following methods:
gst_bin_auto_clock() to let the bin select a clock automatically, gst_bin_get_clock() to
get the current clock of the bin and gst_bin_use_clock() to specify a clock explicitly.
Note that the default behaviour is to automatically select a clock from one of the
clock providers in the bin.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### STRUCT GstBin ##### -->
<para>
</para>
<!-- ##### SIGNAL GstBin::element-added ##### -->
<para>
Will be emmited if a new element was removed/added to this bin.
</para>
@gstbin: the object which received the signal.
@arg1: the element that was added to the bin
<!-- ##### SIGNAL GstBin::element-removed ##### -->
<para>
Will be emmited if an element was removed from this bin.
</para>
@gstbin: the object which received the signal.
@arg1: the element that was removed from the bin
<!-- ##### SIGNAL GstBin::iterate ##### -->
<para>
This signal is emitted when a bin iterates, either automatically or
due to a #gst_bin_iterate() call. The return value is used to
determine if the object method handler processed any data.
In most normal cases, a user-provided signal handler should return
FALSE.
</para>
@gstbin: the object which received the signal.
@Returns: TRUE if the state of the bin was advanced.
<!-- ##### ENUM GstBinFlags ##### -->
<para>
</para>
@GST_BIN_FLAG_MANAGER:
@GST_BIN_SELF_SCHEDULABLE:
@GST_BIN_FLAG_PREFER_COTHREADS:
@GST_BIN_FLAG_FIXED_CLOCK:
@GST_BIN_FLAG_LAST:
<!-- ##### FUNCTION gst_bin_new ##### -->
<para>
</para>
@name:
@Returns:
<!-- ##### FUNCTION gst_bin_add ##### -->
<para>
</para>
@bin:
@element:
<!-- ##### FUNCTION gst_bin_add_many ##### -->
<para>
</para>
@bin:
@element_1:
@Varargs:
<!-- ##### FUNCTION gst_bin_remove ##### -->
<para>
</para>
@bin:
@element:
<!-- ##### FUNCTION gst_bin_remove_many ##### -->
<para>
</para>
@bin:
@element_1:
@Varargs:
<!-- ##### FUNCTION gst_bin_get_by_name ##### -->
<para>
</para>
@bin:
@name:
@Returns:
<!-- ##### FUNCTION gst_bin_get_by_name_recurse_up ##### -->
<para>
</para>
@bin:
@name:
@Returns:
<!-- ##### FUNCTION gst_bin_get_list ##### -->
<para>
</para>
@bin:
@Returns:
<!-- ##### FUNCTION gst_bin_get_by_interface ##### -->
<para>
</para>
@bin:
@interface:
@Returns:
<!-- ##### FUNCTION gst_bin_get_all_by_interface ##### -->
<para>
</para>
@bin:
@interface:
@Returns:
<!-- ##### FUNCTION gst_bin_iterate ##### -->
<para>
</para>
@bin:
@Returns:
<!-- ##### FUNCTION gst_bin_use_clock ##### -->
<para>
</para>
@bin:
@clock:
<!-- ##### FUNCTION gst_bin_get_clock ##### -->
<para>
</para>
@bin:
@Returns:
<!-- ##### FUNCTION gst_bin_auto_clock ##### -->
<para>
</para>
@bin:
<!-- ##### FUNCTION gst_bin_sync_children_state ##### -->
<para>
</para>
@bin:
@Returns:
<!-- ##### FUNCTION gst_bin_child_state_change ##### -->
<para>
</para>
@bin:
@oldstate:
@newstate:
@child:
|
