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- #!/usr/bin/env python
- # -*- Mode: Python -*-
- # vi:si:et:sw=4:sts=4:ts=4
-
- # GStreamer python bindings
- # Copyright (C) 2002 David I. Lehn <dlehn@users.sourceforge.net>
- # 2004 Johan Dahlin <johan@gnome.org>
- #
- # filesrc.py: implements a file source element completely in python
- #
- # 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.
-
- import sys
- import gobject
- import pygst
- pygst.require('0.10')
- import gst
-
- class FileSource(gst.BaseSrc):
- __gsttemplates__ = (
- gst.PadTemplate("src",
- gst.PAD_SRC,
- gst.PAD_ALWAYS,
- gst.caps_new_any()),
- )
-
- blocksize = 4096
- fd = None
-
- def __init__(self, name):
- self.__gobject_init__()
- self.curoffset = 0
- self.set_name(name)
-
- def set_property(self, name, value):
- if name == 'location':
- self.fd = open(value, 'r')
-
- def do_create(self, offset, size):
- if offset != self.curoffset:
- self.fd.seek(offset, 0)
- data = self.fd.read(self.blocksize)
- if data:
- self.curoffset += len(data)
- return gst.FLOW_OK, gst.Buffer(data)
- else:
- return gst.FLOW_UNEXPECTED, None
- gobject.type_register(FileSource)
-
- def main(args):
- if len(args) != 3:
- print 'Usage: %s input output' % (args[0])
- return -1
-
- bin = gst.Pipeline('pipeline')
-
- filesrc = FileSource('filesource')
- assert filesrc
- filesrc.set_property('location', args[1])
-
- filesink = gst.element_factory_make('filesink', 'sink')
- filesink.set_property('location', args[2])
-
- bin.add(filesrc, filesink)
- gst.element_link_many(filesrc, filesink)
-
- bin.set_state(gst.STATE_PLAYING);
- mainloop = gobject.MainLoop()
-
- def bus_event(bus, message):
- t = message.type
- if t == gst.MESSAGE_EOS:
- mainloop.quit()
- elif t == gst.MESSAGE_ERROR:
- err, debug = message.parse_error()
- print "Error: %s" % err, debug
- mainloop.quit()
- return True
- bin.get_bus().add_watch(bus_event)
-
- mainloop.run()
- bin.set_state(gst.STATE_NULL)
-
- if __name__ == '__main__':
- sys.exit(main(sys.argv))
-
-