pyges: Add a PyGes example

bindings/python/examples/simple.py

@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+#
+#       simple.py
+#
+# Copyright (C) 2011 Thibault Saunier <thibault.saunier@collabora.co.uk>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This program 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+from gst import ges
+
+import sys
+import getopt
+import gst
+import glib
+
+class Demo:
+    def __init__(self, files):
+        self.tl_objs = []
+        self.set_pipeline (files)
+
+        for f in files:
+            self.add_tl_object(f)
+            self.mainloop = glib.MainLoop()
+
+    def add_tl_object(self, file):
+        self.tl_objs.append(ges.TimelineFileSource (file))
+        self.layer.add_object(self.tl_objs[-1], -1)
+        transition = ges.TimelineStandardTransition("crossfade")
+        transition.duration = gst.SECOND * 2
+        self.layer.add_object(transition, -1)
+
+    def bus_handler(self, unused_bus, message):
+        if message.type == gst.MESSAGE_ERROR:
+            print "ERROR"
+            self.mainloop.quit()
+        elif message.type == gst.MESSAGE_EOS:
+            print "Done"
+            self.mainloop.quit()
+
+        return gst.BUS_PASS
+
+    def set_pipeline (self, files):
+        try:
+            opts, args = getopt.getopt(sys.argv[1:], "h", ["help"])
+        except getopt.error, msg:
+            print msg
+            print "for help use --help"
+
+        ges.init()
+
+        tl = ges.timeline_new_audio_video()
+        layer = ges.SimpleTimelineLayer()
+        tl.add_layer(layer)
+
+        pipeline = ges.TimelinePipeline()
+        pipeline.add_timeline (tl)
+        bus = pipeline.get_bus()
+        bus.set_sync_handler(self.bus_handler)
+
+        self.pipeline = pipeline
+        self.layer = layer
+
+    def run(self):
+        if (self.pipeline.set_state(gst.STATE_PLAYING) == gst.STATE_CHANGE_FAILURE):
+            print "Couldn't start pipeline"
+
+        self.mainloop.run()
+
+
+def main():
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "h", ["help"])
+    except getopt.error, msg:
+        print msg
+        print "for help use --help"
+        sys.exit(2)
+        # process options
+    for o, a in opts:
+        if o in ("-h", "--help"):
+            print __doc__
+            sys.exit(0)
+
+    demo = Demo(args)
+    demo.run()
+
+
+if __name__ == "__main__":
+    main()