[Assorted-commits] SF.net SVN: assorted:[1146] sandbox/trunk/src/py

[<yan...@us...>]

Revision: 1146
          http://assorted.svn.sourceforge.net/assorted/?rev=1146&view=rev
Author:   yangzhang
Date:     2009-01-26 05:35:42 +0000 (Mon, 26 Jan 2009)

Log Message:
-----------
added gstdemo, ranges

Added Paths:
-----------
    sandbox/trunk/src/py/gstdemo.py
    sandbox/trunk/src/py/ranges.py

Added: sandbox/trunk/src/py/gstdemo.py
===================================================================
--- sandbox/trunk/src/py/gstdemo.py	                        (rev 0)
+++ sandbox/trunk/src/py/gstdemo.py	2009-01-26 05:35:42 UTC (rev 1146)
@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+# Demo of gst, from following the tutorial at
+# <http://pygstdocs.berlios.de/pygst-tutorial/>.  Pass in full path to an audio
+# file.
+
+# You can also do:
+# gst-launch-0.10 playbin uri=file://<PATH>
+
+import gst, urllib, sys, time
+player = gst.element_factory_make('playbin')
+player.set_property('uri', 'file://' + urllib.quote(sys.argv[1]))
+print 'play'
+player.set_state(gst.STATE_PLAYING)
+time.sleep(1) # running in another thread
+print 'still playing'
+player.set_state(gst.STATE_PLAYING)
+time.sleep(1)
+print 'pause'
+player.set_state(gst.STATE_PAUSED)
+time.sleep(.5)
+print 'play'
+player.set_state(gst.STATE_PLAYING)
+time.sleep(.5)
+print 'stop'
+player.set_state(gst.STATE_NULL)
+time.sleep(.5)
+print 'play; note that we have been reset'
+player.set_state(gst.STATE_PLAYING)
+time.sleep(2)
+timefmt = gst.Format(gst.FORMAT_TIME)
+# if you call this in STATE_NULL then you'll get QueryError: query failed
+posns = player.query_position(timefmt, None)[0]
+durns = player.query_duration(timefmt, None)[0]
+print timefmt, posns / 1e9, durns / 1e9
+# "A non flushing seek might take some time to perform as the currently playing
+# data in the pipeline will not be cleared. An accurate seek might be slower
+# for formats that don't have any indexes or timestamp markers in the stream.
+# Specifying this flag might require a complete scan of the file in those
+# cases." From
+# <http://pygstdocs.berlios.de/pygst-reference/gst-constants.html#gst-state-constants>
+print 'seek end'
+player.seek_simple(timefmt, gst.SEEK_FLAG_FLUSH, durns)
+time.sleep(.5)
+print 'seek 50%'
+player.seek_simple(timefmt, gst.SEEK_FLAG_FLUSH, durns / 2)
+time.sleep(1)
+print 'done'


Property changes on: sandbox/trunk/src/py/gstdemo.py
___________________________________________________________________
Added: svn:executable
   + *

Added: sandbox/trunk/src/py/ranges.py
===================================================================
--- sandbox/trunk/src/py/ranges.py	                        (rev 0)
+++ sandbox/trunk/src/py/ranges.py	2009-01-26 05:35:42 UTC (rev 1146)
@@ -0,0 +1,6 @@
+# Sanity-checking my own grasp on range partitioning and int division.
+for i in range(10):
+  for j in range(10):
+    for x in range(j):
+      print 'max=%d n=%d pos=%d:  %d..%d' % (i,j,x,i*x/j,i*(x+1)/j if x<j-1 else i)
+    print


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