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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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455c2109fa
Original commit message from CVS: * gst/arg-types.py: Add ReturnType and Parameter for GstCaps. This allows the codegenerator to wrap properly more virtual proxies.
289 lines
11 KiB
Python
289 lines
11 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
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# Copyright (C) 2002 David I. Lehn
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# 2004 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 Library General Public
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# License as published by the Free Software Foundation; either
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# version 2 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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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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#
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# Author: David I. Lehn <dlehn@users.sourceforge.net>
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from argtypes import UInt64Arg, Int64Arg, PointerArg, ArgMatcher, ArgType, matcher
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from reversewrapper import Parameter, ReturnType, GBoxedParam, GBoxedReturn
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class XmlNodeArg(ArgType):
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"""libxml2 node generator"""
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names = {"xobj":"xmlNode",
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"xptr":"xmlNodePtr",
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"xwrap":"libxml_xmlNodePtrWrap"}
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parm = (' if(xml == NULL) return NULL;\n'
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' xobj = PyObject_GetAttrString(xml, "%(xobj)s");\n'
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' if(!PyObject_IsInstance(py%(name)s, xobj)) {\n'
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' PyErr_Clear();\n'
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' PyErr_SetString(PyExc_RuntimeError,"%(name)s is not a %(xobj)s instance");\n'
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' Py_DECREF(xobj);Py_DECREF(xml);\n'
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' return NULL;\n'
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' }\n'
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' o = PyObject_GetAttrString(py%(name)s, "_o");\n'
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' %(name)s = PyCObject_AsVoidPtr(o);\n')
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parmp = (' Py_DECREF(o); Py_DECREF(xobj);Py_DECREF(xml);\n')
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ret = (' if(xml == NULL) return NULL;\n')
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retp = (' xargs = PyTuple_New(1);\n'
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' xobj = PyObject_GetAttrString(xml, "%(xobj)s");\n'
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' o = %(xwrap)s(ret);\n'
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' PyTuple_SetItem(xargs, 0, o);\n'
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' return PyInstance_New(xobj, xargs, PyDict_New());\n')
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def write_param(self, ptype, pname, pdflt, pnull, keeprefcount, info):
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info.varlist.add('PyObject', '*xml = _gst_get_libxml2_module()')
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info.varlist.add('PyObject', '*o')
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info.varlist.add('PyObject', '*xobj')
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info.varlist.add('PyObject', '*py' + pname)
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info.varlist.add(self.names["xptr"], pname)
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#if pnull:
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info.add_parselist('O', ['&py'+pname], [pname])
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info.arglist.append(pname)
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self.names["name"] = pname
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info.codebefore.append(self.parm % self.names)
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info.codeafter.append(self.parmp % self.names);
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def write_return(self, ptype, ownsreturn, info):
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info.varlist.add('PyObject', '*xml = _gst_get_libxml2_module()')
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info.varlist.add('PyObject', '*xargs')
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info.varlist.add('PyObject', '*xobj')
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info.varlist.add('PyObject', '*o')
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info.varlist.add(self.names["xptr"], 'ret')
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info.codebefore.append(self.ret % self.names)
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info.codeafter.append(self.retp % self.names)
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class XmlDocArg(XmlNodeArg):
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"""libxml2 doc generator"""
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names = {"xobj":"xmlDoc",
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"xptr":"xmlDocPtr",
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"xwrap":"libxml_xmlDocPtrWrap"}
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class GstCapsArg(ArgType):
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"""GstCaps node generator"""
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before = (' %(name)s = pygst_caps_from_pyobject (py_%(name)s, %(namecopy)s);\n'
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' if (PyErr_Occurred())\n'
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' return NULL;\n')
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beforenull = (' if (py_%(name)s == Py_None)\n'
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' %(name)s = NULL;\n'
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' else\n'
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' ' + before)
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after = (' if (%(name)s && %(name)s_is_copy)\n'
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' gst_caps_unref (%(name)s);\n')
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def write_param(self, ptype, pname, pdflt, pnull, keeprefcount, info):
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if ptype == 'const-GstCaps*':
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self.write_const_param(pname, pdflt, pnull, info)
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elif ptype == 'GstCaps*':
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self.write_normal_param(pname, pdflt, pnull, info)
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else:
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raise RuntimeError, "write_param not implemented for %s" % ptype
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def write_const_param(self, pname, pdflt, pnull, info):
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info.varlist.add('PyObject', '*py_'+pname)
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info.varlist.add('GstCaps', '*'+pname)
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info.varlist.add('gboolean', pname+'_is_copy')
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info.add_parselist('O', ['&py_'+pname], [pname])
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info.arglist.append(pname)
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if pnull:
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info.codebefore.append (self.beforenull % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
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else:
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info.codebefore.append (self.before % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
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info.codeafter.append (self.after % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
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def write_normal_param(self, pname, pdflt, pnull, info):
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info.varlist.add('PyObject', '*py_'+pname)
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info.varlist.add('GstCaps', '*'+pname)
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info.add_parselist('O', ['&py_'+pname], [pname])
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info.arglist.append(pname)
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if pnull:
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info.codebefore.append (self.beforenull % { 'name' : pname, 'namecopy' : 'NULL' })
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else:
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info.codebefore.append (self.before % { 'name' : pname, 'namecopy' : 'NULL' })
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def write_return(self, ptype, ownsreturn, info):
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if ptype == 'GstCaps*':
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info.varlist.add('GstCaps', '*ret')
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copyval = 'FALSE'
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elif ptype == 'const-GstCaps*':
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info.varlist.add('const GstCaps', '*ret')
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copyval = 'TRUE'
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else:
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raise RuntimeError, "write_return not implemented for %s" % ptype
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info.codeafter.append(' return pyg_boxed_new (GST_TYPE_CAPS, ret, '+copyval+', TRUE);')
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class GstMiniObjectParam(Parameter):
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def get_c_type(self):
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return self.props.get('c_type', 'GstMiniObject *')
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def convert_c2py(self):
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self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
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self.wrapper.write_code(code=("if (%s)\n"
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" py_%s = pygstminiobject_new((GstMiniObject *) %s);\n"
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"else {\n"
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" Py_INCREF(Py_None);\n"
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" py_%s = Py_None;\n"
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"}"
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% (self.name, self.name, self.name, self.name)),
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cleanup=("Py_DECREF(py_%s);" % self.name))
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self.wrapper.add_pyargv_item("py_%s" % self.name)
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matcher.register_reverse('GstMiniObject*', GstMiniObjectParam)
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class GstMiniObjectReturn(ReturnType):
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def get_c_type(self):
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return self.props.get('c_type', 'GstMiniObject *')
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def write_decl(self):
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self.wrapper.add_declaration("%s retval;" % self.get_c_type())
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def write_error_return(self):
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self.wrapper.write_code("return NULL;")
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def write_conversion(self):
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self.wrapper.write_code("retval = (%s) pygstminiobject_get(py_retval);"
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% self.get_c_type())
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self.wrapper.write_code("gst_mini_object_ref((GstMiniObject *) retval);")
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matcher.register_reverse_ret('GstMiniObject*', GstMiniObjectReturn)
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class GstCapsParam(Parameter):
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def get_c_type(self):
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return self.props.get('c_type', 'GstCaps *')
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def convert_c2py(self):
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self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
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self.wrapper.write_code(code=("if (%s)\n"
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" py_%s = pyg_boxed_new (GST_TYPE_CAPS, %s, FALSE, TRUE);\n"
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"else {\n"
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" Py_INCREF(Py_None);\n"
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" py_%s = Py_None;\n"
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"}"
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% (self.name, self.name, self.name, self.name)),
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cleanup=("Py_DECREF(py_%s);" % self.name))
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self.wrapper.add_pyargv_item("py_%s" % self.name)
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matcher.register_reverse('GstCaps*', GstCapsParam)
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class GstCapsReturn(ReturnType):
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def get_c_type(self):
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return self.props.get('c_type', 'GstCaps *')
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def write_decl(self):
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self.wrapper.add_declaration("%s retval;" % self.get_c_type())
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def write_error_return(self):
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self.wrapper.write_code("return NULL;")
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def write_conversion(self):
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self.wrapper.write_code("retval = (%s) pygst_caps_from_pyobject (py_retval, NULL);"
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% self.get_c_type())
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## self.wrapper.write_code("gst_mini_object_ref((GstMiniObject *) retval);")
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matcher.register_reverse_ret('GstCaps*', GstCapsReturn)
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class Int64Param(Parameter):
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def get_c_type(self):
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return self.props.get('c_type', 'gint64')
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def convert_c2py(self):
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self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
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self.wrapper.write_code(code=("py_%s = PyLong_FromLongLong(%s);" %
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(self.name, self.name)),
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cleanup=("Py_DECREF(py_%s);" % self.name))
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self.wrapper.add_pyargv_item("py_%s" % self.name)
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class Int64Return(ReturnType):
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def get_c_type(self):
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return self.props.get('c_type', 'gint64')
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def write_decl(self):
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self.wrapper.add_declaration("%s retval;" % self.get_c_type())
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def write_error_return(self):
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self.wrapper.write_code("return -G_MAXINT;")
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def write_conversion(self):
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self.wrapper.write_code(
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code=None,
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failure_expression="!PyLong_Check(py_retval)",
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failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be an long");')
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self.wrapper.write_code("retval = PyLong_AsLongLong(py_retval);")
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class UInt64Param(Parameter):
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def get_c_type(self):
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return self.props.get('c_type', 'guint64')
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def convert_c2py(self):
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self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
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self.wrapper.write_code(code=("py_%s = PyLong_FromUnsignedLongLong(%s);" %
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(self.name, self.name)),
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cleanup=("Py_DECREF(py_%s);" % self.name))
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self.wrapper.add_pyargv_item("py_%s" % self.name)
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class UInt64Return(ReturnType):
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def get_c_type(self):
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return self.props.get('c_type', 'guint64')
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def write_decl(self):
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self.wrapper.add_declaration("%s retval;" % self.get_c_type())
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def write_error_return(self):
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self.wrapper.write_code("return -G_MAXINT;")
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def write_conversion(self):
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self.wrapper.write_code(
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code=None,
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failure_expression="!PyLong_Check(py_retval)",
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failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be an long");')
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self.wrapper.write_code("retval = PyLong_AsUnsignedLongLongMask(py_retval);")
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matcher.register('GstClockTime', UInt64Arg())
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matcher.register('GstClockTimeDiff', Int64Arg())
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matcher.register('xmlNodePtr', XmlNodeArg())
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matcher.register('xmlDocPtr', XmlDocArg())
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matcher.register('GstCaps', GstCapsArg()) #FIXME: does this work?
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matcher.register('GstCaps*', GstCapsArg()) #FIXME: does this work?
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matcher.register('const-GstCaps*', GstCapsArg())
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arg = PointerArg('gpointer', 'G_TYPE_POINTER')
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matcher.register('GstClockID', arg)
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for typename in ["GstPlugin", "GstStructure", "GstTagList", "GError", "GstDate", "GstSegment"]:
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matcher.register_reverse(typename, GBoxedParam)
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matcher.register_reverse_ret(typename, GBoxedReturn)
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for typename in ["GstBuffer*", "GstEvent*", "GstMessage*", "GstQuery*"]:
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matcher.register_reverse(typename, GstMiniObjectParam)
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matcher.register_reverse_ret(typename, GstMiniObjectReturn)
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for typename in ["gint64", "GstClockTimeDiff"]:
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matcher.register_reverse(typename, Int64Param)
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matcher.register_reverse_ret(typename, Int64Return)
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for typename in ["guint64", "GstClockTime"]:
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matcher.register_reverse(typename, UInt64Param)
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matcher.register_reverse_ret(typename, UInt64Return)
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del arg
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