add constructor for caps

Original commit message from CVS:
add constructor for caps

ChangeLog

@@ -1,3 +1,12 @@
+2004-08-06  Thomas Vander Stichele  <thomas at apestaart dot org>
+
+	* gst/gst.defs:
+	* gst/gst.override:
+	* testsuite/caps.py:
+	  add a constructor for caps that wraps _new_empty, _from_string
+	  and an alternative to _new_full.
+	  add tests for them.
+
 2004-08-06  Johan Dahlin  <johan@gnome.org>
 
 	* gst/gst.override (_wrap_gst_structure_from_string): Impl.

gst/gst.defs

@@ -309,7 +309,8 @@
   (return-type "GType")
 )
 
-(define-function caps_new_empty
+(define-function new_empty
+  (is-constructor-of "GstCaps")
   (c-name "gst_caps_new_empty")
   (return-type "GstCaps*")
 )

gst/gst.override

@@ -385,6 +385,49 @@ _wrap_gst_pad_get_negotiated_caps(PyGObject *self)
 	return pyg_boxed_new(GST_TYPE_CAPS, ret, TRUE, TRUE);
 }
 %%
+override gst_caps_new_empty kwargs
+static int
+_wrap_gst_caps_new_empty(PyGBoxed *self, PyObject *args, PyObject *kwargs)
+{
+	PyObject* item;
+	int len, i;
+
+        /* we wrap caps_new, caps_from_string and caps_new_full */
+        len = PyTuple_Size(args);
+        self->gtype = GST_TYPE_CAPS;
+	self->free_on_dealloc = FALSE;
+        if (len == 0) {
+		self->boxed = gst_caps_new_empty();
+	} else if (len == 1) {
+		item = PyTuple_GetItem(args, 0);
+		if (!PyString_Check(item)) {
+                        PyErr_SetString(PyExc_TypeError, "argument must be a string");
+			return -1;
+		}		
+		self->boxed = gst_caps_from_string(PyString_AsString(item));
+	} else {
+		self->boxed = gst_caps_new_empty();
+        	for (i = 0; i < len; i++)
+        	{
+                	item = PyTuple_GetItem(args, i);
+                	if (!pyg_boxed_check(item, GST_TYPE_STRUCTURE))
+                	{
+                        	PyErr_SetString(PyExc_TypeError, "argument must be a GstStructure");
+				gst_caps_free(self->boxed);
+				return -1;
+			}
+			gst_caps_append_structure(self->boxed, pyg_boxed_get(item, GstStructure));
+		}
+	}
+
+
+	if (!self->boxed) {
+		PyErr_SetString(PyExc_RuntimeError, "could not create GstCaps object");
+		return -1;
+	}
+	return 0;
+}
+%%
 override gst_caps_get_structure kwargs
 static PyObject *
 _wrap_gst_caps_get_structure(PyObject *self, PyObject *args, PyObject *kwargs)

testsuite/caps.py

@@ -19,6 +19,34 @@ class CapsTest(unittest.TestCase):
 	mime = structure.get_name()
 	assert mime == 'video/x-raw-rgb'
 
+    def testCapsConstructEmpty(self):
+        caps = gst.Caps()
+	assert isinstance(caps, gst.Caps)
+
+    def testCapsConstructFromString(self):
+        caps = gst.Caps('video/x-raw-yuv,width=10')
+	assert isinstance(caps, gst.Caps)
+        assert len(caps) == 1
+	assert isinstance(caps[0], gst.Structure)
+        assert caps[0].get_name() == 'video/x-raw-yuv'
+	assert isinstance(caps[0]['width'], int)
+        assert caps[0]['width'] == 10
+
+    def testCapsConstructFromStructures(self):
+        struct1 = gst.structure_from_string('video/x-raw-yuv,width=10')
+        struct2 = gst.structure_from_string('video/x-raw-rgb,width=20')
+        caps = gst.Caps(struct1, struct2)
+	assert isinstance(caps, gst.Caps)
+        assert len(caps) == 2
+	assert isinstance(caps[0], gst.Structure)
+	assert isinstance(caps[1], gst.Structure)
+        assert caps[0].get_name() == 'video/x-raw-yuv'
+        assert caps[1].get_name() == 'video/x-raw-rgb'
+	assert isinstance(caps[0]['width'], int)
+	assert isinstance(caps[1]['width'], int)
+        assert caps[0]['width'] == 10
+        assert caps[1]['width'] == 20
+
     def testCapsStructureChange(self):
 	'test if changing the structure of the caps works by reference'
 	assert self.structure['width'] == 10

testsuite/test_caps.py

@@ -19,6 +19,34 @@ class CapsTest(unittest.TestCase):
 	mime = structure.get_name()
 	assert mime == 'video/x-raw-rgb'
 
+    def testCapsConstructEmpty(self):
+        caps = gst.Caps()
+	assert isinstance(caps, gst.Caps)
+
+    def testCapsConstructFromString(self):
+        caps = gst.Caps('video/x-raw-yuv,width=10')
+	assert isinstance(caps, gst.Caps)
+        assert len(caps) == 1
+	assert isinstance(caps[0], gst.Structure)
+        assert caps[0].get_name() == 'video/x-raw-yuv'
+	assert isinstance(caps[0]['width'], int)
+        assert caps[0]['width'] == 10
+
+    def testCapsConstructFromStructures(self):
+        struct1 = gst.structure_from_string('video/x-raw-yuv,width=10')
+        struct2 = gst.structure_from_string('video/x-raw-rgb,width=20')
+        caps = gst.Caps(struct1, struct2)
+	assert isinstance(caps, gst.Caps)
+        assert len(caps) == 2
+	assert isinstance(caps[0], gst.Structure)
+	assert isinstance(caps[1], gst.Structure)
+        assert caps[0].get_name() == 'video/x-raw-yuv'
+        assert caps[1].get_name() == 'video/x-raw-rgb'
+	assert isinstance(caps[0]['width'], int)
+	assert isinstance(caps[1]['width'], int)
+        assert caps[0]['width'] == 10
+        assert caps[1]['width'] == 20
+
     def testCapsStructureChange(self):
 	'test if changing the structure of the caps works by reference'
 	assert self.structure['width'] == 10