gstreamer1.0-plugins-base-doc 1.8.0-1ubuntu1 / usr / share / gtk-doc / html / gst-plugins-base-libs-1.0 / gst-plugins-base-libs-appsrc.html

This file is indexed.

/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-appsrc.html is in gstreamer1.0-plugins-base-doc 1.8.0-1ubuntu1.

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
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>appsrc: GStreamer Base Plugins 1.0 Library Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
<link rel="up" href="gstreamer-app.html" title="App Library">
<link rel="prev" href="gstreamer-app.html" title="App Library">
<link rel="next" href="gst-plugins-base-libs-appsink.html" title="appsink">
<meta name="generator" content="GTK-Doc V1.24 (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="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gst-plugins-base-libs-appsrc.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="gstreamer-app.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="gstreamer-app.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="gst-plugins-base-libs-appsink.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="gst-plugins-base-libs-appsrc"></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-appsrc.top_of_page"></a>appsrc</span></h2>
<p>appsrc — Easy way for applications to inject buffers into a
    pipeline</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-caps" title="gst_app_src_set_caps ()">gst_app_src_set_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstCaps.html"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-caps" title="gst_app_src_get_caps ()">gst_app_src_get_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-latency" title="gst_app_src_get_latency ()">gst_app_src_get_latency</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-latency" title="gst_app_src_set_latency ()">gst_app_src_set_latency</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-size" title="gst_app_src_set_size ()">gst_app_src_set_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="returnvalue">gint64</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-size" title="gst_app_src_get_size ()">gst_app_src_get_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-stream-type" title="gst_app_src_set_stream_type ()">gst_app_src_set_stream_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppStreamType" title="enum GstAppStreamType"><span class="returnvalue">GstAppStreamType</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-stream-type" title="gst_app_src_get_stream_type ()">gst_app_src_get_stream_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-max-bytes" title="gst_app_src_set_max_bytes ()">gst_app_src_set_max_bytes</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="returnvalue">guint64</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-max-bytes" title="gst_app_src_get_max_bytes ()">gst_app_src_get_max_bytes</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="returnvalue">guint64</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-current-level-bytes" title="gst_app_src_get_current_level_bytes ()">gst_app_src_get_current_level_bytes</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-get-emit-signals" title="gst_app_src_get_emit_signals ()">gst_app_src_get_emit_signals</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-emit-signals" title="gst_app_src_set_emit_signals ()">gst_app_src_set_emit_signals</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-callbacks" title="gst_app_src_set_callbacks ()">gst_app_src_set_callbacks</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-push-buffer" title="gst_app_src_push_buffer ()">gst_app_src_push_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-push-sample" title="gst_app_src_push_sample ()">gst_app_src_push_sample</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-end-of-stream" title="gst_app_src_end_of_stream ()">gst_app_src_end_of_stream</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppStreamType" title="enum GstAppStreamType">GstAppStreamType</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppSrcCallbacks" title="GstAppSrcCallbacks">GstAppSrcCallbacks</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/app/gstappsrc.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.description"></a><h2>Description</h2>
<p>The appsrc element can be used by applications to insert data into a
GStreamer pipeline. Unlike most GStreamer elements, appsrc provides
external API functions.</p>
<p>appsrc can be used by linking with the libgstapp library to access the
methods directly or by using the appsrc action signals.</p>
<p>Before operating appsrc, the caps property must be set to fixed caps
describing the format of the data that will be pushed with appsrc. An
exception to this is when pushing buffers with unknown caps, in which case no
caps should be set. This is typically true of file-like sources that push raw
byte buffers. If you don't want to explicitly set the caps, you can use
gst_app_src_push_sample. This method gets the caps associated with the
sample and sets them on the appsrc replacing any previously set caps (if
different from sample's caps).</p>
<p>The main way of handing data to the appsrc element is by calling the
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-push-buffer" title="gst_app_src_push_buffer ()"><code class="function">gst_app_src_push_buffer()</code></a> method or by emitting the push-buffer action signal.
This will put the buffer onto a queue from which appsrc will read from in its
streaming thread. It is important to note that data transport will not happen
from the thread that performed the push-buffer call.</p>
<p>The "max-bytes" property controls how much data can be queued in appsrc
before appsrc considers the queue full. A filled internal queue will always
signal the "enough-data" signal, which signals the application that it should
stop pushing data into appsrc. The "block" property will cause appsrc to
block the push-buffer method until free data becomes available again.</p>
<p>When the internal queue is running out of data, the "need-data" signal is
emitted, which signals the application that it should start pushing more data
into appsrc.</p>
<p>In addition to the "need-data" and "enough-data" signals, appsrc can emit the
"seek-data" signal when the "stream-mode" property is set to "seekable" or
"random-access". The signal argument will contain the new desired position in
the stream expressed in the unit set with the "format" property. After
receiving the seek-data signal, the application should push-buffers from the
new position.</p>
<p>These signals allow the application to operate the appsrc in two different
ways:</p>
<p>The push mode, in which the application repeatedly calls the push-buffer/push-sample
method with a new buffer/sample. Optionally, the queue size in the appsrc 
can be controlled with the enough-data and need-data signals by respectively 
stopping/starting the push-buffer/push-sample calls. This is a typical 
mode of operation for the stream-type "stream" and "seekable". Use this 
mode when implementing various network protocols or hardware devices.</p>
<p>The pull mode, in which the need-data signal triggers the next push-buffer call.
This mode is typically used in the "random-access" stream-type. Use this
mode for file access or other randomly accessable sources. In this mode, a
buffer of exactly the amount of bytes given by the need-data signal should be
pushed into appsrc.</p>
<p>In all modes, the size property on appsrc should contain the total stream
size in bytes. Setting this property is mandatory in the random-access mode.
For the stream and seekable modes, setting this property is optional but
recommended.</p>
<p>When the application has finished pushing data into appsrc, it should call
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-end-of-stream" title="gst_app_src_end_of_stream ()"><code class="function">gst_app_src_end_of_stream()</code></a> or emit the end-of-stream action signal. After
this call, no more buffers can be pushed into appsrc until a flushing seek
occurs or the state of the appsrc has gone through READY.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-app-src-set-caps"></a><h3>gst_app_src_set_caps ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_caps (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                      <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstCaps.html"><span class="type">GstCaps</span></a> *caps</code></em>);</pre>
<p>Set the capabilities on the appsrc element.  This function takes
a copy of the caps structure. After calling this method, the source will
only produce caps that match <em class="parameter"><code>caps</code></em>
. <em class="parameter"><code>caps</code></em>
 must be fixed and the caps on the
buffers must match the caps or left NULL.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>caps</p></td>
<td class="parameter_description"><p>caps to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-caps"></a><h3>gst_app_src_get_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstCaps.html"><span class="returnvalue">GstCaps</span></a> *
gst_app_src_get_caps (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Get the configured caps on <em class="parameter"><code>appsrc</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.3.6"></a><h4>Returns</h4>
<p> the <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstCaps.html"><span class="type">GstCaps</span></a> produced by the source. <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstCaps.html#gst-caps-unref"><code class="function">gst_caps_unref()</code></a> after usage.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-latency"></a><h3>gst_app_src_get_latency ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_get_latency (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *min</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *max</code></em>);</pre>
<p>Retrieve the min and max latencies in <em class="parameter"><code>min</code></em>
 and <em class="parameter"><code>max</code></em>
 respectively.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>min</p></td>
<td class="parameter_description"><p>the min latency</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>max</p></td>
<td class="parameter_description"><p>the min latency</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-latency"></a><h3>gst_app_src_set_latency ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_latency (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> min</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> max</code></em>);</pre>
<p>Configure the <em class="parameter"><code>min</code></em>
 and <em class="parameter"><code>max</code></em>
 latency in <em class="parameter"><code>src</code></em>
. If <em class="parameter"><code>min</code></em>
 is set to -1, the
default latency calculations for pseudo-live sources will be used.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>min</p></td>
<td class="parameter_description"><p>the min latency</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>max</p></td>
<td class="parameter_description"><p>the min latency</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-size"></a><h3>gst_app_src_set_size ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_size (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> size</code></em>);</pre>
<p>Set the size of the stream in bytes. A value of -1 means that the size is
not known.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>the size to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-size"></a><h3>gst_app_src_get_size ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="returnvalue">gint64</span></a>
gst_app_src_get_size (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Get the size of the stream in bytes. A value of -1 means that the size is
not known.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.7.6"></a><h4>Returns</h4>
<p> the size of the stream previously set with <a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-size" title="gst_app_src_set_size ()"><code class="function">gst_app_src_set_size()</code></a>;</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-stream-type"></a><h3>gst_app_src_set_stream_type ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_stream_type (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                             <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppStreamType" title="enum GstAppStreamType"><span class="type">GstAppStreamType</span></a> type</code></em>);</pre>
<p>Set the stream type on <em class="parameter"><code>appsrc</code></em>
. For seekable streams, the "seek" signal must
be connected to.</p>
<p>A stream_type stream</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.8.6"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>the new state</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-stream-type"></a><h3>gst_app_src_get_stream_type ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppStreamType" title="enum GstAppStreamType"><span class="returnvalue">GstAppStreamType</span></a>
gst_app_src_get_stream_type (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Get the stream type. Control the stream type of <em class="parameter"><code>appsrc</code></em>

with <a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-stream-type" title="gst_app_src_set_stream_type ()"><code class="function">gst_app_src_set_stream_type()</code></a>.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.9.6"></a><h4>Returns</h4>
<p> the stream type.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-max-bytes"></a><h3>gst_app_src_set_max_bytes ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_max_bytes (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> max</code></em>);</pre>
<p>Set the maximum amount of bytes that can be queued in <em class="parameter"><code>appsrc</code></em>
.
After the maximum amount of bytes are queued, <em class="parameter"><code>appsrc</code></em>
 will emit the
"enough-data" signal.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.10.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>max</p></td>
<td class="parameter_description"><p>the maximum number of bytes to queue</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-max-bytes"></a><h3>gst_app_src_get_max_bytes ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="returnvalue">guint64</span></a>
gst_app_src_get_max_bytes (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Get the maximum amount of bytes that can be queued in <em class="parameter"><code>appsrc</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.11.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.11.6"></a><h4>Returns</h4>
<p> The maximum amount of bytes that can be queued.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-current-level-bytes"></a><h3>gst_app_src_get_current_level_bytes ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="returnvalue">guint64</span></a>
gst_app_src_get_current_level_bytes (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Get the number of currently queued bytes inside <em class="parameter"><code>appsrc</code></em>
.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.12.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.12.6"></a><h4>Returns</h4>
<p> The number of currently queued bytes.</p>
</div>
<p class="since">Since: 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-get-emit-signals"></a><h3>gst_app_src_get_emit_signals ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_app_src_get_emit_signals (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Check if appsrc will emit the "new-preroll" and "new-buffer" signals.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.13.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.13.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>appsrc</code></em>
is emitting the "new-preroll" and "new-buffer"
signals.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-emit-signals"></a><h3>gst_app_src_set_emit_signals ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_emit_signals (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> emit</code></em>);</pre>
<p>Make appsrc emit the "new-preroll" and "new-buffer" signals. This option is
by default disabled because signal emission is expensive and unneeded when
the application prefers to operate in pull mode.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.14.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>emit</p></td>
<td class="parameter_description"><p>the new state</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-set-callbacks"></a><h3>gst_app_src_set_callbacks ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_app_src_set_callbacks (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                           <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-appsrc.html#GstAppSrcCallbacks" title="GstAppSrcCallbacks"><span class="type">GstAppSrcCallbacks</span></a> *callbacks</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>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Set callbacks which will be executed when data is needed, enough data has
been collected or when a seek should be performed.
This is an alternative to using the signals, it has lower overhead and is thus
less expensive, but also less flexible.</p>
<p>If callbacks are installed, no signals will be emitted for performance
reasons.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.5.4.7.15.7"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callbacks</p></td>
<td class="parameter_description"><p>the callbacks</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>a user_data argument for the callbacks</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>a destroy notify function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-push-buffer"></a><h3>gst_app_src_push_buffer ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_app_src_push_buffer (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBuffer.html"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre>
<p>Adds a buffer to the queue of buffers that the appsrc element will
push to its source pad.  This function takes ownership of the buffer.</p>
<p>When the block property is TRUE, this function can block until free
space becomes available in the queue.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.16.6"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBuffer.html"><span class="type">GstBuffer</span></a> to push. </p></td>
<td class="parameter_annotations"><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>
<div class="refsect3">
<a name="id-1.2.5.4.7.16.7"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> when the buffer was successfuly queued.
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> when <em class="parameter"><code>appsrc</code></em>
is not PAUSED or PLAYING.
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-EOS:CAPS"><span class="type">GST_FLOW_EOS</span></a> when EOS occured.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-push-sample"></a><h3>gst_app_src_push_sample ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_app_src_push_sample (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstSample.html"><span class="type">GstSample</span></a> *sample</code></em>);</pre>
<p>Extract a buffer from the provided sample and adds it to the queue of 
buffers that the appsrc element will push to its source pad. Any 
previous caps that were set on appsrc will be replaced by the caps
associated with the sample if not equal.</p>
<p>When the block property is TRUE, this function can block until free
space becomes available in the queue.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.17.6"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sample</p></td>
<td class="parameter_description"><p> a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstSample.html"><span class="type">GstSample</span></a> from which buffer and caps may be
extracted. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.17.7"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> when the buffer was successfuly queued.
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> when <em class="parameter"><code>appsrc</code></em>
is not PAUSED or PLAYING.
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-EOS:CAPS"><span class="type">GST_FLOW_EOS</span></a> when EOS occured.</p>
</div>
<p class="since">Since: 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-app-src-end-of-stream"></a><h3>gst_app_src_end_of_stream ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_app_src_end_of_stream (<em class="parameter"><code><span class="type">GstAppSrc</span> *appsrc</code></em>);</pre>
<p>Indicates to the appsrc element that the last buffer queued in the
element is the last buffer of the stream.</p>
<div class="refsect3">
<a name="id-1.2.5.4.7.18.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>appsrc</p></td>
<td class="parameter_description"><p>a <span class="type">GstAppSrc</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.4.7.18.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> when the EOS was successfuly queued.
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> when <em class="parameter"><code>appsrc</code></em>
is not PAUSED or PLAYING.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstAppStreamType"></a><h3>enum GstAppStreamType</h3>
<p>The stream type.</p>
<div class="refsect3">
<a name="id-1.2.5.4.8.2.4"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-APP-STREAM-TYPE-STREAM:CAPS"></a>GST_APP_STREAM_TYPE_STREAM</p></td>
<td class="enum_member_description">
<p>No seeking is supported in the stream, such as a
live stream.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-APP-STREAM-TYPE-SEEKABLE:CAPS"></a>GST_APP_STREAM_TYPE_SEEKABLE</p></td>
<td class="enum_member_description">
<p>The stream is seekable but seeking might not
be very fast, such as data from a webserver.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-APP-STREAM-TYPE-RANDOM-ACCESS:CAPS"></a>GST_APP_STREAM_TYPE_RANDOM_ACCESS</p></td>
<td class="enum_member_description">
<p>The stream is seekable and seeking is fast,
such as in a local file.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstAppSrcCallbacks"></a><h3>GstAppSrcCallbacks</h3>
<pre class="programlisting">typedef struct {
  void      (*need_data)    (GstAppSrc *src, guint length, gpointer user_data);
  void      (*enough_data)  (GstAppSrc *src, gpointer user_data);
  gboolean  (*seek_data)    (GstAppSrc *src, guint64 offset, gpointer user_data);
} GstAppSrcCallbacks;
</pre>
<p>A set of callbacks that can be installed on the appsrc with
<a class="link" href="gst-plugins-base-libs-appsrc.html#gst-app-src-set-callbacks" title="gst_app_src_set_callbacks ()"><code class="function">gst_app_src_set_callbacks()</code></a>.</p>
<div class="refsect3">
<a name="id-1.2.5.4.8.3.5"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstAppSrcCallbacks.need-data"></a>need_data</code></em> ()</p></td>
<td class="struct_member_description"><p>Called when the appsrc needs more data. A buffer or EOS should be
pushed to appsrc from this thread or another thread. <em class="parameter"><code>length</code></em>
is just a hint
and when it is set to -1, any number of bytes can be pushed into <em class="parameter"><code>appsrc</code></em>
.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstAppSrcCallbacks.enough-data"></a>enough_data</code></em> ()</p></td>
<td class="struct_member_description"><p>Called when appsrc has enough data. It is recommended that the
application stops calling push-buffer until the need_data callback is
emitted again to avoid excessive buffer queueing.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstAppSrcCallbacks.seek-data"></a>seek_data</code></em> ()</p></td>
<td class="struct_member_description"><p>Called when a seek should be performed to the offset.
The next push-buffer should produce buffers from the new <em class="parameter"><code>offset</code></em>
.
This callback is only called for seekable stream types.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-appsrc.see-also"></a><h2>See Also</h2>
<p><a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseSrc.html"><span class="type">GstBaseSrc</span></a>, appsink</p>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.24</div>
</body>
</html>

APT Browse - Built by Thomas Orozco.