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93 lines
2.6 KiB
Python
Executable file
93 lines
2.6 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# gst-python
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# Copyright (C) 2002 David I. Lehn
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# 2004 Johan Dahlin
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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#
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# Author: David I. Lehn <dlehn@users.sourceforge.net>
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#
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import sys
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import gobject
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import gst
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class Identity(gst.Element):
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def __init__(self):
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self.__gobject_init__()
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self.sinkpad = gst.Pad('sink', gst.PAD_SINK)
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self.add_pad(self.sinkpad)
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self.sinkpad.set_chain_function(self.chain)
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self.sinkpad.set_link_function(self.pad_link)
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self.srcpad = gst.Pad('src', gst.PAD_SRC)
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self.add_pad(self.srcpad)
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self.srcpad.set_link_function(self.pad_link)
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def get_bufferpool(self, pad):
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print 'get_bufferpool:', self, pad
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return self.srcpad.get_bufferpool()
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def pad_link(self, pad, caps):
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print 'pad_link:', self, pad, caps
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return gst.PAD_LINK_OK
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def chain(self, pad, buf):
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self.srcpad.push(buf)
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gobject.type_register(Identity)
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def filter(element):
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# create a new bin to hold the elements
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bin = gst.Pipeline('pipeline')
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filesrc = gst.Element('sinesrc', 'source');
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filesink = gst.Element('fakesink', 'sink')
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stats = gst.Element('statistics', 'stats');
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stats.set_property('silent', False)
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stats.set_property('buffer_update_freq', True)
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stats.set_property('update_on_eos', True)
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bin.add_many(filesrc, element, stats, filesink)
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gst.element_link_many(filesrc, element, stats, filesink)
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# start playing
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bin.set_state(gst.STATE_PLAYING);
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while bin.iterate():
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pass
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# stop the bin
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bin.set_state(gst.STATE_NULL)
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def main(args):
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"A GStreamer Python subclassing example of an identity filter"
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print "This example is not finished."
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sys.exit(1)
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identity = Identity()
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identity.set_name('identity')
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if not identity:
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print 'could not create \"Identity\" element'
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return -1
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return filter(identity)
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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