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114 lines
4.4 KiB
Python
114 lines
4.4 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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class GstDataPtrArg(ArgType):
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normal = (' if (!pygst_data_from_pyobject(py_%(name)s, &%(name)s))\n'
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' return NULL;\n')
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null = (' if (py_%(name)s == Py_None)\n'
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' %(name)s = NULL;\n'
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' else if (pyst_data_from_pyobject(py_%(name)s, %(name)s_rect))\n'
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' %(name)s = &%(name)s_rect;\n'
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' else\n'
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' return NULL;\n')
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def write_param(self, ptype, pname, pdflt, pnull, info):
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if pnull:
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info.varlist.add('GstData', pname + '_data')
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info.varlist.add('GstData', '*' + pname)
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info.varlist.add('PyObject', '*py_' + pname + ' = Py_None')
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info.add_parselist('O', ['&py_' + pname], [pname])
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info.arglist.append(pname)
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info.codebefore.append(self.null % {'name': pname})
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else:
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info.varlist.add('GstData*', pname)
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info.varlist.add('PyObject', '*py_' + pname)
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info.add_parselist('O', ['&py_' + pname], [pname])
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info.arglist.append(pname)
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info.codebefore.append(self.normal % {'name': pname})
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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, 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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matcher.register('GstData*', GstDataPtrArg())
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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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arg = PointerArg('gpointer', 'G_TYPE_POINTER')
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matcher.register('GstClockID', arg)
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del arg
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