Add overrides for GObject Introspection

Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = common examples testsuite
+SUBDIRS = common examples testsuite gi
 
 # include before EXTRA_DIST for win32 assignment
 include $(top_srcdir)/common/win32.mak

configure.ac

@@ -7,6 +7,8 @@ AC_INIT(GStreamer GObject Introspectin tests for Python , 0.11.92,
     http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer,
     gst-python)
 
+AG_GST_INIT
+
 dnl initialize automake
 AM_INIT_AUTOMAKE([-Wno-portability 1.10])
 
@@ -36,10 +38,9 @@ AC_SUBST(ACLOCAL_AMFLAGS, "-I m4 -I common/m4")
 dnl required versions of other packages
 dnl Note that they are runtime requirements
 AC_SUBST(GST_REQ,   0.11.92)
-AC_SUBST(GSTPB_REQ, 0.11.92)
 
 dnl check for python
-dnl AM_PATH_PYTHON(2.2)
+dnl AM_PATH_PYTHON(2.5)
 AM_PATH_PYTHON
 AC_MSG_CHECKING(for python >= 2.5)
 prog="
@@ -55,10 +56,37 @@ then
 else
   AC_MSG_ERROR(too old)
 fi
+AS_AC_EXPAND(PYTHONDIR, $pythondir)
+AS_AC_EXPAND(PYEXECDIR, $pyexecdir)
+
+AC_ARG_WITH([pygi_overrides_dir],
+            AC_HELP_STRING([--with-pygi-overrides-dir], [Path to pygobject overrides directory]))
+
+AC_MSG_CHECKING(for pygobject overrides directory)
+if test "x$with_pygi_overrides_dir" = "x" ; then
+        overrides_dir="`$PYTHON -c 'import gi; print(gi._overridesdir)' 2>/dev/null`"
+    # fallback if the previous failed
+    if test "x$overrides_dir" = "x" ; then
+        overrides_dir="${pyexecdir}/gi/overrides"
+    fi
+else
+        overrides_dir="$with_pygi_overrides_dir"
+fi
+
+PYGI_OVERRIDES_DIR="$overrides_dir"
+AC_SUBST(PYGI_OVERRIDES_DIR)
+AC_MSG_RESULT($PYGI_OVERRIDES_DIR)
+
+dnl and set the override directory
+AC_ARG_WITH([pygi_overrides_dir],
+            AC_HELP_STRING([--with-pygi-overrides-dir], [Path to pygobject overrides directory]))
 
 AG_GST_VALGRIND_CHECK
 
 dnl set release date/time
+#AG_GST_SET_PACKAGE_RELEASE_DATETIME_WITH_NANO([$PACKAGE_VERSION_NANO],
+  #["${srcdir}/gst-python.doap"],
+  #[$PACKAGE_VERSION_MAJOR.$PACKAGE_VERSION_MINOR.$PACKAGE_VERSION_MICRO])
 
 AC_OUTPUT([
   Makefile
@@ -66,4 +94,6 @@ AC_OUTPUT([
   common/m4/Makefile
   examples/Makefile
   testsuite/Makefile
+  gi/Makefile
+  gi/overrides/Makefile
 ])

gi/Makefile.am

@@ -0,0 +1 @@
+SUBDIRS = overrides

gi/__init__.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+#
+#       __init__.py
+#
+# Copyright (C) 2012 Thibault Saunier <thibaul.saunier@collabora.com>
+# 
+# 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.
+
+
+from pkgutil import extend_path
+
+__path__ = extend_path(__path__, __name__)

gi/overrides/Gst.py

@@ -0,0 +1,169 @@
+# -*- Mode: Python; py-indent-offset: 4 -*-
+# vim: tabstop=4 shiftwidth=4 expandtab
+#
+#       Gst.py
+#
+# Copyright (C) 2012 Thibault Saunier <thibault.saunier@collabora.com>
+#
+# 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
+from ..overrides import override
+from ..importer import modules
+
+if sys.version_info >= (3, 0):
+    _basestring = str
+    _callable = lambda c: hasattr(c, '__call__')
+else:
+    _basestring = basestring
+    _callable = callable
+
+Gst = modules['Gst']._introspection_module
+__all__ = []
+
+if Gst._version == '0.10':
+    import warnings
+    warn_msg = "You have imported the Gst 0.10 module.  Because Gst 0.10 \
+was not designed for use with introspection some of the \
+interfaces and API will fail.  As such this is not supported \
+by the GStreamer development team and we encourage you to \
+port your app to Gst 1 or greater. gst-python is the recomended \
+python module to use with Gst 0.10"
+
+    warnings.warn(warn_msg, RuntimeWarning)
+
+class Caps(Gst.Caps):
+
+    def __new__(cls, *kwargs):
+        if not kwargs:
+            return Caps.new_empty()
+        elif len(kwargs) > 1:
+            raise TypeError("wrong arguments when creating GstCaps object")
+        elif isinstance(kwargs[0], str):
+            return Caps.from_string(kwargs[0])
+        elif isinstance(kwargs[0], Caps):
+            return kwargs[0].copy()
+
+        raise TypeError("wrong arguments when creating GstCaps object")
+
+    def __str__(self):
+        return self.to_string()
+
+Caps = override(Caps)
+__all__.append('Caps')
+
+class ElementFactory(Gst.ElementFactory):
+
+    # ElementFactory
+    def get_longname(self):
+        return self.get_metadata("long-name")
+
+    def get_description(self):
+        return self.get_metadata("description")
+
+    def get_klass(self):
+        return self.get_metadata("klass")
+
+ElementFactory = override(ElementFactory)
+__all__.append('ElementFactory')
+
+class Fraction(Gst.Fraction):
+    def __init__(self, num, denom=1):
+        def __gcd(a, b):
+            while b != 0:
+                tmp = a
+                a = b
+                b = tmp % b
+            return abs(a)
+
+        def __simplify():
+            num = self.num
+            denom = self.denom
+
+            if num < 0:
+                num = -num
+                denom = -denom
+
+            # Compute greatest common divisor
+            gcd = __gcd(num, denom)
+            if gcd != 0:
+                num /= gcd
+                denom /= gcd
+
+            self.num = num
+            self.denom = denom
+
+        self.num = num
+        self.denom = denom
+
+        __simplify()
+        self.type = "fraction"
+
+    def __repr__(self):
+        return '<Gst.Fraction %d/%d>' % (self.num, self.denom)
+
+    def __value__(self):
+        return self.num / self.denom
+
+    def __eq__(self, other):
+        if isinstance(other, Fraction):
+            return self.num * other.denom == other.num * self.denom
+        return False
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __mul__(self, other):
+        if isinstance(other, Fraction):
+            return Fraction(self.num * other.num,
+                            self.denom * other.denom)
+        elif isinstance(other, int):
+            return Fraction(self.num * other, self.denom)
+        raise TypeError
+
+    __rmul__ = __mul__
+
+    def __div__(self, other):
+        if isinstance(other, Fraction):
+            return Fraction(self.num * other.denom,
+                            self.denom * other.num)
+        elif isinstance(other, int):
+            return Fraction(self.num, self.denom * other)
+        return TypeError
+
+    def __rdiv__(self, other):
+        if isinstance(other, int):
+            return Fraction(self.denom * other, self.num)
+        return TypeError
+
+    def __float__(self):
+        return float(self.num) / float(self.denom)
+
+Fraction = override(Fraction)
+__all__.append('Fraction')
+
+initialized, argv = Gst.init_check(sys.argv)
+import _gi_gst
+print _gi_gst
+
+sys.argv = list(argv)
+if not initialized:
+    raise RuntimeError("Gst couldn't be initialized")
+

gi/overrides/Makefile.am

@@ -0,0 +1,4 @@
+
+# We install everything in the gi/overrides folder
+pygioverridesdir = $(PYGI_OVERRIDES_DIR)
+pygioverrides_PYTHON = Gst.py

gi/overrides/__init__.py

@@ -0,0 +1,4 @@
+from pkgutil import extend_path
+
+__path__ = extend_path(__path__, __name__)
+print __path__, __name__