examples/filesrc.py: Port to 0.10.

Original commit message from CVS:
reviewed by: Edward Hervey <edward@fluendo.com>
* examples/filesrc.py: Port to 0.10.

ChangeLog

@@ -1,3 +1,9 @@
+2006-04-27  Johan Rydberg  <jrydberg@gnu.org>
+
+	reviewed by: Edward Hervey <edward@fluendo.com>
+	
+	* examples/filesrc.py: Port to 0.10.
+
 2006-05-27  Edward Hervey  <edward@fluendo.com>
 
 	* examples/audio-controller.py:

examples/filesrc.py

@@ -25,35 +25,42 @@
 
 import sys
 import gobject
+import pygst
+pygst.require('0.10')
 import gst
 
-class FileSource(gst.Element):
+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)
-        self.srcpad = gst.Pad('src', gst.PAD_SRC)
-        self.srcpad.set_get_function(self.srcpad_get)
-        self.add_pad(self.srcpad)
             
     def set_property(self, name, value):
         if name == 'location':
             self.fd = open(value, 'r')
-            
-    def srcpad_get(self, pad):
+
+    def do_create(self, offset, size):
+        if offset != self.curoffset:
+            self.fd.seek(offset, 0)
         data = self.fd.read(self.blocksize)
         if data:
-            return gst.Buffer(data)
+            self.curoffset += len(data)
+            return gst.FLOW_OK, gst.Buffer(data)
         else:
-            self.set_eos()
-            return gst.Event(gst.EVENT_EOS)
+            return gst.FLOW_UNEXPECTED, None
 gobject.type_register(FileSource)
 
 def main(args):
-    print 'This example is not finished yet.'
-    return
-
     if len(args) != 3:
         print 'Usage: %s input output' % (args[0])
         return -1
@@ -61,21 +68,30 @@ def main(args):
     bin = gst.Pipeline('pipeline')
 
     filesrc = FileSource('filesource')
-    #filesrc = gst.Element('filesrc', 'src')
     assert filesrc
     filesrc.set_property('location', args[1])
    
     filesink = gst.element_factory_make('filesink', 'sink')
     filesink.set_property('location', args[2])
 
-    bin.add_many(filesrc, filesink)
+    bin.add(filesrc, filesink)
     gst.element_link_many(filesrc, filesink)
     
     bin.set_state(gst.STATE_PLAYING);
+    mainloop = gobject.MainLoop()
 
-    while bin.iterate():
-        pass
+    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__':