mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-03 15:06:34 +00:00
64 lines
1.7 KiB
Python
Executable file
64 lines
1.7 KiB
Python
Executable file
#!/usr/bin/env python
|
|
#
|
|
# gst-python
|
|
# Copyright (C) 2002 David I. Lehn
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Library General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Library General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Library General Public
|
|
# License along with this library; if not, write to the
|
|
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
# Boston, MA 02111-1307, USA.
|
|
#
|
|
# Author: David I. Lehn <dlehn@vt.edu>
|
|
#
|
|
|
|
import sys
|
|
from gstreamer import *
|
|
import gobject
|
|
from identity import Identity
|
|
from cp import filter
|
|
|
|
class Rot13(Identity):
|
|
def chain(self, pad, buf):
|
|
# override Identity's chain
|
|
data = buf.get_data()
|
|
data2 = ''
|
|
# waste cycles
|
|
for c in data:
|
|
if c.isalpha():
|
|
if c.islower():
|
|
a = 'a'
|
|
else:
|
|
a = 'A'
|
|
c = chr((((ord(c) - ord(a)) + 13) % 26) + ord(a))
|
|
data2 = data2 + c
|
|
newbuf = Buffer()
|
|
newbuf.set_data(data2)
|
|
self.srcpad.push(newbuf)
|
|
|
|
gobject.type_register(Rot13)
|
|
|
|
def main():
|
|
"A GStreamer Python subclassing example of a rot13 filter"
|
|
gst_debug_set_categories(0L)
|
|
|
|
rot13 = Rot13()
|
|
rot13.set_name('rot13')
|
|
if not rot13:
|
|
print 'could not create \"Rot13\" element'
|
|
return -1
|
|
|
|
return filter([rot13])
|
|
|
|
if __name__ == '__main__':
|
|
ret = main()
|
|
sys.exit (ret)
|