From cd7e03d9364a7f2f45b3868fd602542c78385131 Mon Sep 17 00:00:00 2001
From: Stefan Sauer <ensonic@users.sf.net>
Date: Mon, 31 Oct 2011 10:49:41 +0100
Subject: [PATCH] examples: add helloworld example

Add a straight 1:1 copy from cores' helloworld.c to show how the c api maps into
the pythong bindings. It would rock to have the same in other bindings.
---
 examples/Makefile.am   |  1 +
 examples/helloworld.py | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 examples/helloworld.py

diff --git a/examples/Makefile.am b/examples/Makefile.am
index c6338de..629b68e 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -10,6 +10,7 @@ examples_DATA = 	\
 	fvumeter.py	\
 	gst-discover	\
 	gstfile.py	\
+	helloworld.py	\
 	mixer.py	\
 	play.py		\
 	pipeline-tester \
diff --git a/examples/helloworld.py b/examples/helloworld.py
new file mode 100644
index 0000000..0ef0205
--- /dev/null
+++ b/examples/helloworld.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+
+import sys
+
+import gobject
+gobject.threads_init()
+
+import pygst
+pygst.require('0.10')
+import gst
+
+def bus_call(bus, message, loop):
+    t = message.type
+    if t == gst.MESSAGE_EOS:
+        sys.stout.write("End-of-stream\n")
+        loop.quit()
+    elif t == gst.MESSAGE_ERROR:
+        err, debug = message.parse_error()
+        sys.stderr.write("Error: %s: %s\n" % err, debug)
+        loop.quit()
+    return True
+
+def main(args):
+    if len(args) != 2:
+        sys.stderr.write("usage: %s <media file or uri>\n" % args[0])
+        sys.exit(1)
+        
+    playbin = gst.element_factory_make("playbin2", None)
+    if not playbin:
+        sys.stderr.write("'playbin2' gstreamer plugin missing\n")
+        sys.exit(1)
+
+    # take the commandline argument and ensure that it is a uri
+    if gst.uri_is_valid(args[1]):
+      uri = args[1]
+    else:
+      uri = gst.filename_to_uri(args[1])
+    playbin.set_property('uri', uri)
+
+    # create and event loop and feed gstreamer bus mesages to it
+    loop = gobject.MainLoop()
+
+    bus = playbin.get_bus()
+    bus.add_watch(bus_call, loop)
+    
+    # start play back and listed to events
+    playbin.set_state(gst.STATE_PLAYING)
+    loop.run()
+    
+    # cleanup
+    playbin.set_state(gst.STATE_NULL)
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))
-- 
2.7.4