Update

subprojects/gst-python/old_examples/filesrc.py

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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., 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+import sys
+import gobject; gobject.threads_init()
+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))
+