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a4566ffbc8
This patch adds overrides to support IntRange, Int64Range, DoubleRange,
FractionRange, Array and List. For integer ranges, it maps this
to python 'range'. Gst.IntRange() and Gst.Int64Range() are simple cast
to let the underlying code know which GType to use. To set such range in
python you will do:
structure["range"] = Gst.IntRange(range(0,10,2)))
Same for the 64 bit variant. And when you do:
r = structure.get_value("range")
A range will be returned directly, without the wrapper. For DoubleRange
and FractionRange, there is no native support in python. So the usage
will be:
structure["range"] = Gst.DoubleRange(0,10.0)
structure["range"] =
Gst.FractionRange(Gst.Fraction(1/30), Gst.Fraction(1/5)
When getting this value, Gst.DoubleRange and Gst.FractionRange class are
returned. They both have start/stop members. The naming was taken from
range type.
For Array and List, both uses the native list type, though they can be
constructed from any python sequence. So again, the class is just like
a cast, to let it pick the right GType and python list are being
returned.
structure["list"] = Gst.ValueList([1,2,3,4])
structure["array"] = Gst.ValueArray([1,2,3,4)
Using string and tuple could also work. Since Gst.ValueList/Array are
sequence, you can convert one to the other with:
list = Gst.ValueList([1,2,3,4])
array = Gst.ValueArray (list)
https://bugzilla.gnome.org/show_bug.cgi?id=753754
87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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#
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# gst-python - Python bindings for GStreamer
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# Copyright (C) 2007 Johan Dahlin
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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import overrides_hack
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overrides_hack
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from common import TestCase
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import gi
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gi.require_version("Gst", "1.0")
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from gi.repository import Gst
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Gst.init(None)
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A = Gst.ValueArray
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class TestFraction(TestCase):
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def testConstructor(self):
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Gst.init(None)
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a = A((1,2,3))
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self.assertEquals(a.array, [1,2,3])
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self.assertRaises(TypeError, A, 1)
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self.assertRaises(TypeError, A)
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def testRepr(self):
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Gst.init(None)
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self.assertEquals(repr(A([1,2,3])), '<Gst.ValueArray <1,2,3>>')
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def testPropertyMarshalling(self):
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Gst.init(None)
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obj = Gst.ElementFactory.make("rawvideoparse")
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if not obj:
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# no rawvideoparse and I don't know of any elements in core or -base using
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# fraction properties. Skip this test.
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return
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value = obj.props.plane_strides
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self.failUnlessEqual(value[0], 320)
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self.failUnlessEqual(value[1], 160)
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self.failUnlessEqual(value[2], 160)
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obj.props.plane_strides = A([640,320,320])
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value = obj.props.plane_strides
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self.failUnlessEqual(value[0], 640)
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self.failUnlessEqual(value[1], 320)
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self.failUnlessEqual(value[2], 320)
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def bad():
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obj.props.plane_strides = 1
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self.failUnlessRaises(TypeError, bad)
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value = obj.props.plane_strides
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self.failUnlessEqual(value[0], 640)
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self.failUnlessEqual(value[1], 320)
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self.failUnlessEqual(value[2], 320)
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def testGetValue(self):
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Gst.init(None)
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st = Gst.Structure.new_empty("video/x-raw")
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st["array"] = A([Gst.Fraction(1, 30), Gst.Fraction(1, 2)])
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value = st["array"]
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self.failUnlessEqual(value[0], Gst.Fraction(1, 30))
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self.failUnlessEqual(value[1], Gst.Fraction(1, 2))
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