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117 lines
3.3 KiB
Python
117 lines
3.3 KiB
Python
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#!/usr/bin/env python
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# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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# GStreamer python bindings
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# Copyright (C) 2002 David I. Lehn <dlehn@users.sourceforge.net>
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# 2004 Johan Dahlin <johan@gnome.org>
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#
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# filesrc.py: implements a file source element completely in python
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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., 51 Franklin Street, Fifth Floor,
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# Boston, MA 02110-1301, USA.
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import gi
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import sys
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gi.require_version('Gst', '1.0')
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gi.require_version('GstBase', '1.0')
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from gi.repository import GLib, Gst, GObject, GstBase
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if __name__ == '__main__':
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Gst.init(None)
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Gst.init_python()
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class FileSource(GstBase.BaseSrc):
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__gstmetadata__ = ('PyFileSource', 'Source',
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'Custom Python filesrc example', 'Jan Schmidt')
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__gsttemplates__ = (
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Gst.PadTemplate.new("src",
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Gst.PadDirection.SRC,
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Gst.PadPresence.ALWAYS,
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Gst.Caps.new_any()),
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)
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blocksize = 4096
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fd = None
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def __init__(self, name):
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super().__init__()
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self.curoffset = 0
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self.set_name(name)
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def set_property(self, name, value):
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if name == 'location':
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self.fd = open(value, 'rb')
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def do_create(self, offset, size, wot):
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if offset != self.curoffset:
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self.fd.seek(offset, 0)
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data = self.fd.read(self.blocksize)
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if data:
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self.curoffset += len(data)
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return Gst.FlowReturn.OK, Gst.Buffer.new_wrapped(data)
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else:
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return Gst.FlowReturn.EOS, None
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GObject.type_register(FileSource)
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__gstelementfactory__ = ("filesrc_py", Gst.Rank.NONE, FileSource)
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def main(args):
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Gst.init()
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if len(args) != 3:
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print(f'Usage: {args[0]} input output')
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return -1
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bin = Gst.Pipeline('pipeline')
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filesrc = FileSource('filesource')
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assert filesrc
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filesrc.set_property('location', args[1])
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filesink = Gst.ElementFactory.make('filesink', 'sink')
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filesink.set_property('location', args[2])
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bin.add(filesrc, filesink)
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Gst.Element.link_many(filesrc, filesink)
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bin.set_state(Gst.State.PLAYING)
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mainloop = GLib.MainLoop()
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def bus_event(bus, message):
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t = message.type
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if t == Gst.MessageType.EOS:
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mainloop.quit()
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elif t == Gst.MessageType.ERROR:
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err, debug = message.parse_error()
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print(f"Error: {err}, {debug}")
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mainloop.quit()
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return True
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bus = bin.get_bus()
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bus.add_signal_watch()
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bus.connect('message', bus_event)
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mainloop.run()
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bin.set_state(Gst.State.NULL)
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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