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
|
#!/usr/bin/env python
# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
# sinkelement.py
# (c) 2005 Edward Hervey <edward@fluendo.com>
# (c) 2007 Jan Schmidt <jan@fluendo.com>
# Licensed under LGPL
#
# Small test application to show how to write a sink element
# in 20 lines in python and place into the gstreamer registry
# so it can be autoplugged or used from parse_launch.
#
# Run this script with GST_DEBUG=python:5 to see the debug
# messages
import pygst
pygst.require('0.10')
import gst
import gobject
gobject.threads_init ()
#
# Simple Sink element created entirely in python
#
class MySink(gst.Element):
__gstdetails__ = ('CustomSink','Sink', \
'Custom test sink element', 'Edward Hervey')
_sinkpadtemplate = gst.PadTemplate ("sinkpadtemplate",
gst.PAD_SINK,
gst.PAD_ALWAYS,
gst.caps_new_any())
def __init__(self):
gst.Element.__init__(self)
gst.info('creating sinkpad')
self.sinkpad = gst.Pad(self._sinkpadtemplate, "sink")
gst.info('adding sinkpad to self')
self.add_pad(self.sinkpad)
gst.info('setting chain/event functions')
self.sinkpad.set_chain_function(self.chainfunc)
self.sinkpad.set_event_function(self.eventfunc)
def chainfunc(self, pad, buffer):
self.info("%s timestamp(buffer):%d" % (pad, buffer.timestamp))
return gst.FLOW_OK
def eventfunc(self, pad, event):
self.info("%s event:%r" % (pad, event.type))
return True
gobject.type_register(MySink)
# Register the element into this process' registry.
gst.element_register (MySink, 'mysink', gst.RANK_MARGINAL)
print "Use --gst-debug=python:3 to see output from this example"
#
# Code to test the MySink class
#
gst.info('About to create MySink')
pipeline = gst.parse_launch ("fakesrc ! mysink")
pipeline.set_state(gst.STATE_PLAYING)
gobject.MainLoop().run()
|
