gst/gstbuffer.override: the GstBuffer overrides seem to be confused about whether they're mini-objects or a GBoxed, a...

Original commit message from CVS:
* gst/gstbuffer.override:
the GstBuffer overrides seem to be confused about whether they're
mini-objects or a GBoxed, and it makes copy_on_write no actually
return a usable gst.Buffer. Fix up places where GstBuffers are
treated as GBoxed to use pygstminiobject functions.
Makes gst.Buffer('blah').copy_on_write() work.
* testsuite/test_buffer.py:
Add test for copy-on-write writability
* examples/buffer-draw.py:
Add an example of drawing on a GStreamer buffer with cairo
* gst/gstpad.override:
Make function static

1 files changed, 10 insertions, 0 deletions

diff --git a/testsuite/test_buffer.py b/testsuite/test_buffer.py
index bce6d1a..b4a5fb2 100644
--- a/testsuite/test_buffer.py
+++ b/testsuite/test_buffer.py
@@ -87,6 +87,16 @@ class BufferTest(TestCase):
 
         spaned_buffer = buffer1.span(0L, buffer2, 6L)
         assert str(spaned_buffer) == 'foobar'
+    def testBufferCopyOnWrite(self):
+        s='test_vector'
+        buffer = gst.Buffer(s)
+        sub = buffer.create_sub(0, buffer.size)
+        self.assertEquals(sub.size, buffer.size)
+        out = sub.copy_on_write ()
+        self.assertEquals(out.size, sub.size)
+        assert str(out) == str(buffer)
+        out[5] = 'w'
+        assert str(out) == 'test_wector'
 
     def testBufferFlagIsSet(self):
         buffer = gst.Buffer()