From 143e84f8dcc12035cc2bceb91825a76b8bcb6bbd Mon Sep 17 00:00:00 2001
From: Justin Forest <justin.forest@gmail.com>
Date: Sun, 14 Mar 2010 21:28:13 +0100
Subject: [PATCH] GStreamer-based episode length detection (bug 882)

---
 src/gpodder/gstreamer.py | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/gpodder/sync.py      |  5 ++++
 2 files changed, 71 insertions(+)
 create mode 100644 src/gpodder/gstreamer.py

diff --git a/src/gpodder/gstreamer.py b/src/gpodder/gstreamer.py
new file mode 100644
index 00000000..1adfa110
--- /dev/null
+++ b/src/gpodder/gstreamer.py
@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+#
+# gPodder - A media aggregator and podcast client
+# Copyright (c) 2005-2010 Thomas Perl and the gPodder Team
+#
+# gPodder 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 of the License, or
+# (at your option) any later version.
+#
+# gPodder 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+try:
+    import gobject
+    import pygst
+    pygst.require('0.10')
+    import gst
+    from gst.extend.discoverer import Discoverer
+    have_gst = True
+except:
+    have_gst = False
+
+class GstFile:
+    def __init__(self):
+        self.mainloop = gobject.MainLoop()
+        self.result = None
+
+    def run(self, filename):
+        gobject.idle_add(self.on_idle, filename)
+        self.mainloop.run()
+        return self.result / gst.MSECOND
+
+    def on_idle(self, filename):
+        d = Discoverer(filename)
+        d.connect('discovered', self.on_data)
+        d.discover()
+        return False
+
+    def on_data(self, discoverer, ismedia):
+        if discoverer.is_video:
+            self.result = discoverer.videolength
+        elif discoverer.is_audio:
+            self.result = discoverer.audiolength
+        gobject.idle_add(self.mainloop.quit)
+
+def get_track_length(filename):
+    """
+    Returns track length in microseconds.
+
+    Prefers video streams to audio streams. If no supported streams were found,
+    returns None.
+    """
+    if not have_gst:
+        return None
+    return GstFile().run(filename)
+
+__all__ = ['get_track_length']
+
+# vim: set ts=4 sts=4 sw=4 et:
diff --git a/src/gpodder/sync.py b/src/gpodder/sync.py
index bb2f4afe..0cee9c17 100644
--- a/src/gpodder/sync.py
+++ b/src/gpodder/sync.py
@@ -27,6 +27,7 @@ import gpodder
 from gpodder import util
 from gpodder import services
 from gpodder import libconverter
+from gpodder import gstreamer
 
 from gpodder.liblogger import log
 
@@ -94,6 +95,10 @@ def open_device(config):
         return None
 
 def get_track_length(filename):
+    length = gstreamer.get_track_length(filename)
+    if length is not None:
+        return length
+
     if util.find_command('mplayer') is not None:
         try:
             mplayer_output = os.popen('mplayer -msglevel all=-1 -identify -vo null -ao null -frames 0 "%s" 2>/dev/null' % filename).read()
-- 
2.11.4.GIT