pyges: Add an effect example

bindings/python/examples/Makefile.am

@@ -2,5 +2,6 @@ examplesdir = $(pkgdatadir)/$(GST_MAJORMINOR)/examples
 
 examples_DATA = 	\
 	simple.py
+	effect.py
 
 EXTRA_DIST = $(examples_DATA)

bindings/python/examples/effect.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+#
+#       effect.py
+#
+# Copyright (C) 2011 Mathieu Duponchelle <seeed@laposte.net>
+# Copyright (C) 2011 Luis de Bethencourt <luis.debethencourt@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.
+
+import sys
+import optparse
+
+import glib
+import gobject
+gobject.threads_init()
+
+import gst
+import ges
+
+class Effect:
+    def __init__(self, effects):
+        ges.init()
+        self.mainloop = glib.MainLoop()
+
+        self.timeline = ges.timeline_new_audio_video()
+        layer = ges.TimelineLayer()
+        self.src = ges.TimelineTestSource()
+        self.src.set_start(long(0))
+
+        self.src.set_duration(long(3000000000))
+        self.src.set_vpattern("smpte75")
+        layer.add_object(self.src)
+        self.timeline.add_layer(layer)
+
+        self.add_effects(effects)
+
+        self.pipeline = ges.TimelinePipeline()
+        self.pipeline.add_timeline(self.timeline)
+        bus = self.pipeline.get_bus()
+        bus.set_sync_handler(self.bus_handler)
+
+    def add_effects(self, effects):
+        for e in effects:
+            effect = ges.TrackParseLaunchEffect(e)
+            self.src.add_track_object(effect)
+            for track in self.timeline.get_tracks():
+                if track.get_caps().to_string() == \
+                        "video/x-raw-yuv; video/x-raw-rgb":
+                    print "setting effect: " + e
+                    track.add_object(effect)
+
+    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 run(self):
+        if (self.pipeline.set_state(gst.STATE_PLAYING) == \
+                gst.STATE_CHANGE_FAILURE):
+            print "Couldn't start pipeline"
+
+        self.mainloop.run()
+
+def main(args):
+    usage = "usage: %s effect_name-1 .. effect_name-n\n" % args[0]
+
+    if len(args) < 2:
+        print usage + "using aging tv as a default instead"
+        args.append("agingtv")
+
+    parser = optparse.OptionParser (usage=usage)
+    (opts, args) = parser.parse_args ()
+
+    effect = Effect(args)
+    effect.run()
+
+if __name__ == "__main__":
+    main(sys.argv)