mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-08 15:45:55 +00:00
419 lines
15 KiB
Python
419 lines
15 KiB
Python
# -*- Mode: Python -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
#
|
|
# gst-python
|
|
# Copyright (C) 2002 David I. Lehn
|
|
# 2004 Johan Dahlin
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Library General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Library General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Library General Public
|
|
# License along with this library; if not, write to the
|
|
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
# Boston, MA 02111-1307, USA.
|
|
#
|
|
# Author: David I. Lehn <dlehn@users.sourceforge.net>
|
|
|
|
from argtypes import UInt64Arg, Int64Arg, PointerArg, ArgMatcher, ArgType, matcher
|
|
from reversewrapper import Parameter, ReturnType, GBoxedParam, GBoxedReturn, IntParam, IntReturn
|
|
|
|
class XmlNodeArg(ArgType):
|
|
"""libxml2 node generator"""
|
|
|
|
names = {"xobj":"xmlNode",
|
|
"xptr":"xmlNodePtr",
|
|
"xwrap":"libxml_xmlNodePtrWrap"}
|
|
|
|
parm = (' if(xml == NULL) return NULL;\n'
|
|
' xobj = PyObject_GetAttrString(xml, "%(xobj)s");\n'
|
|
' if(!PyObject_IsInstance(py%(name)s, xobj)) {\n'
|
|
' PyErr_Clear();\n'
|
|
' PyErr_SetString(PyExc_RuntimeError,"%(name)s is not a %(xobj)s instance");\n'
|
|
' Py_DECREF(xobj);Py_DECREF(xml);\n'
|
|
' return NULL;\n'
|
|
' }\n'
|
|
' o = PyObject_GetAttrString(py%(name)s, "_o");\n'
|
|
' %(name)s = PyCObject_AsVoidPtr(o);\n')
|
|
parmp = (' Py_DECREF(o); Py_DECREF(xobj);Py_DECREF(xml);\n')
|
|
|
|
ret = (' if(xml == NULL) return NULL;\n')
|
|
retp = (' xargs = PyTuple_New(1);\n'
|
|
' xobj = PyObject_GetAttrString(xml, "%(xobj)s");\n'
|
|
' o = %(xwrap)s(ret);\n'
|
|
' PyTuple_SetItem(xargs, 0, o);\n'
|
|
' return PyInstance_New(xobj, xargs, PyDict_New());\n')
|
|
|
|
def write_param(self, ptype, pname, pdflt, pnull, keeprefcount, info):
|
|
info.varlist.add('PyObject', '*xml = _gst_get_libxml2_module()')
|
|
info.varlist.add('PyObject', '*o')
|
|
info.varlist.add('PyObject', '*xobj')
|
|
info.varlist.add('PyObject', '*py' + pname)
|
|
info.varlist.add(self.names["xptr"], pname)
|
|
#if pnull:
|
|
info.add_parselist('O', ['&py'+pname], [pname])
|
|
info.arglist.append(pname)
|
|
self.names["name"] = pname
|
|
info.codebefore.append(self.parm % self.names)
|
|
info.codeafter.append(self.parmp % self.names);
|
|
def write_return(self, ptype, ownsreturn, info):
|
|
info.varlist.add('PyObject', '*xml = _gst_get_libxml2_module()')
|
|
info.varlist.add('PyObject', '*xargs')
|
|
info.varlist.add('PyObject', '*xobj')
|
|
info.varlist.add('PyObject', '*o')
|
|
info.varlist.add(self.names["xptr"], 'ret')
|
|
info.codebefore.append(self.ret % self.names)
|
|
info.codeafter.append(self.retp % self.names)
|
|
|
|
class XmlDocArg(XmlNodeArg):
|
|
"""libxml2 doc generator"""
|
|
names = {"xobj":"xmlDoc",
|
|
"xptr":"xmlDocPtr",
|
|
"xwrap":"libxml_xmlDocPtrWrap"}
|
|
|
|
class GstCapsArg(ArgType):
|
|
"""GstCaps node generator"""
|
|
|
|
before = (' %(name)s = pygst_caps_from_pyobject (py_%(name)s, %(namecopy)s);\n'
|
|
' if (PyErr_Occurred())\n'
|
|
' return NULL;\n')
|
|
beforenull = (' if (py_%(name)s == Py_None || py_%(name)s == NULL)\n'
|
|
' %(name)s = NULL;\n'
|
|
' else\n'
|
|
' ' + before)
|
|
after = (' if (%(name)s && %(name)s_is_copy)\n'
|
|
' gst_caps_unref (%(name)s);\n')
|
|
|
|
def write_param(self, ptype, pname, pdflt, pnull, keeprefcount, info):
|
|
if ptype == 'const-GstCaps*':
|
|
self.write_const_param(pname, pdflt, pnull, info)
|
|
elif ptype == 'GstCaps*':
|
|
self.write_normal_param(pname, pdflt, pnull, info)
|
|
else:
|
|
raise RuntimeError, "write_param not implemented for %s" % ptype
|
|
|
|
def write_const_param(self, pname, pdflt, pnull, info):
|
|
if pdflt:
|
|
assert pdflt == 'NULL'
|
|
info.varlist.add('PyObject', '*py_' + pname + ' = NULL')
|
|
else:
|
|
info.varlist.add('PyObject', '*py_' + pname)
|
|
info.varlist.add('GstCaps', '*'+pname)
|
|
info.varlist.add('gboolean', pname+'_is_copy')
|
|
info.add_parselist('O', ['&py_'+pname], [pname])
|
|
info.arglist.append(pname)
|
|
if pnull:
|
|
info.codebefore.append (self.beforenull % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
|
|
else:
|
|
info.codebefore.append (self.before % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
|
|
info.codeafter.append (self.after % { 'name' : pname, 'namecopy' : '&'+pname+'_is_copy' })
|
|
|
|
def write_normal_param(self, pname, pdflt, pnull, info):
|
|
if pdflt:
|
|
assert pdflt == 'NULL'
|
|
info.varlist.add('PyObject', '*py_' + pname + ' = NULL')
|
|
else:
|
|
info.varlist.add('PyObject', '*py_' + pname)
|
|
info.varlist.add('GstCaps', '*'+pname)
|
|
info.add_parselist('O', ['&py_'+pname], [pname])
|
|
info.arglist.append(pname)
|
|
if pnull:
|
|
info.codebefore.append (self.beforenull % { 'name' : pname, 'namecopy' : 'NULL' })
|
|
else:
|
|
info.codebefore.append (self.before % { 'name' : pname, 'namecopy' : 'NULL' })
|
|
|
|
def write_return(self, ptype, ownsreturn, info):
|
|
if ptype == 'GstCaps*':
|
|
info.varlist.add('GstCaps', '*ret')
|
|
copyval = 'FALSE'
|
|
elif ptype == 'const-GstCaps*':
|
|
info.varlist.add('const GstCaps', '*ret')
|
|
copyval = 'TRUE'
|
|
else:
|
|
raise RuntimeError, "write_return not implemented for %s" % ptype
|
|
info.codeafter.append(' return pyg_boxed_new (GST_TYPE_CAPS, (GstCaps*) ret, '+copyval+', TRUE);')
|
|
|
|
class GstIteratorArg(ArgType):
|
|
def write_return(self, ptype, ownsreturn, info):
|
|
info.varlist.add('GstIterator', '*ret')
|
|
info.codeafter.append(' return pygst_iterator_new(ret);')
|
|
|
|
class GstMiniObjectArg(ArgType):
|
|
|
|
before = (' %(name)s = %(macro)s(pygstminiobject_get (py_%(name)s));\n'
|
|
' if (PyErr_Occurred())\n'
|
|
' return NULL;\n')
|
|
|
|
def write_param(self, ptype, pname, pdflt, pnull, keeprefcount, info):
|
|
if pdflt:
|
|
assert pdflt == 'NULL'
|
|
info.varlist.add('PyObject', '*py_' + pname + ' = NULL')
|
|
else:
|
|
info.varlist.add('PyObject', '*py_' + pname)
|
|
|
|
#Converts 'GstBuffer*' to 'GstBuffer'
|
|
#and const-GstBuffer* to 'const GstBuffer'
|
|
info.varlist.add(ptype.replace('-',' ').replace('*',''), '*'+pname)
|
|
|
|
if ptype in ['GstBuffer*', 'const-GstBuffer*']:
|
|
info.codebefore.append(self.before % { 'name' : pname, 'macro' : 'GST_BUFFER' })
|
|
|
|
elif ptype in ['GstMessage*', 'const-GstMessage*']:
|
|
info.codebefore.append(self.before % { 'name' : pname, 'macro' : 'GST_MESSAGE' })
|
|
|
|
elif ptype in ['GstEvent*', 'const-GstEvent*']:
|
|
info.codebefore.append(self.before % { 'name' : pname, 'macro' : 'GST_EVENT' })
|
|
|
|
elif ptype in ['GstQuery*', 'const-GstQuery*']:
|
|
info.codebefore.append(self.before % { 'name' : pname, 'macro' : 'GST_QUERY' })
|
|
|
|
else:
|
|
raise RuntimeError, "write_param not implemented for %s" % ptype
|
|
|
|
info.add_parselist('O', ['&py_'+pname], [pname])
|
|
info.arglist.append(pname)
|
|
|
|
def write_return(self, ptype, ownsreturn, info):
|
|
info.varlist.add('GstMiniObject', '*ret')
|
|
info.codeafter.append(' return pygstminiobject_new((GstMiniObject *) ret);')
|
|
|
|
class GstMiniObjectParam(Parameter):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'GstMiniObject *')
|
|
|
|
def convert_c2py(self):
|
|
self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
|
|
self.wrapper.write_code(code=("if (%s) {\n"
|
|
" py_%s = pygstminiobject_new((GstMiniObject *) %s);\n"
|
|
" gst_mini_object_unref ((GstMiniObject *) %s);\n"
|
|
"} else {\n"
|
|
" Py_INCREF(Py_None);\n"
|
|
" py_%s = Py_None;\n"
|
|
"}"
|
|
% (self.name, self.name, self.name, self.name, self.name)),
|
|
cleanup=("gst_mini_object_ref ((GstMiniObject *) %s); Py_DECREF(py_%s);" % (self.name, self.name)))
|
|
self.wrapper.add_pyargv_item("py_%s" % self.name)
|
|
|
|
matcher.register_reverse('GstMiniObject*', GstMiniObjectParam)
|
|
|
|
class GstMiniObjectReturn(ReturnType):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'GstMiniObject *')
|
|
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
|
|
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return NULL;")
|
|
|
|
def write_conversion(self):
|
|
self.wrapper.write_code("retval = (%s) pygstminiobject_get(py_retval);"
|
|
% self.get_c_type())
|
|
self.wrapper.write_code("gst_mini_object_ref((GstMiniObject *) retval);")
|
|
|
|
matcher.register_reverse_ret('GstMiniObject*', GstMiniObjectReturn)
|
|
|
|
class GstCapsParam(Parameter):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'GstCaps *')
|
|
|
|
def convert_c2py(self):
|
|
self.wrapper.add_declaration("PyObject *py_%s = NULL;" % self.name)
|
|
self.wrapper.write_code(code=("if (%s)\n"
|
|
" py_%s = pyg_boxed_new (GST_TYPE_CAPS, %s, FALSE, TRUE);\n"
|
|
"else {\n"
|
|
" Py_INCREF(Py_None);\n"
|
|
" py_%s = Py_None;\n"
|
|
"}"
|
|
% (self.name, self.name, self.name, self.name)),
|
|
cleanup=("gst_caps_ref(%s);\nPy_DECREF(py_%s);" % (self.name, self.name)))
|
|
self.wrapper.add_pyargv_item("py_%s" % self.name)
|
|
|
|
matcher.register_reverse('GstCaps*', GstCapsParam)
|
|
|
|
class GstCapsReturn(ReturnType):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'GstCaps *')
|
|
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
|
|
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return NULL;")
|
|
|
|
def write_conversion(self):
|
|
self.wrapper.write_code("retval = (%s) pygst_caps_from_pyobject (py_retval, NULL);"
|
|
% self.get_c_type())
|
|
## self.wrapper.write_code("gst_mini_object_ref((GstMiniObject *) retval);")
|
|
|
|
matcher.register_reverse_ret('GstCaps*', GstCapsReturn)
|
|
|
|
|
|
class Int64Param(Parameter):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'gint64')
|
|
|
|
def convert_c2py(self):
|
|
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
|
|
self.wrapper.write_code(code=("py_%s = PyLong_FromLongLong(%s);" %
|
|
(self.name, self.name)),
|
|
cleanup=("Py_DECREF(py_%s);" % self.name))
|
|
self.wrapper.add_pyargv_item("py_%s" % self.name)
|
|
|
|
class Int64Return(ReturnType):
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'gint64')
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return -G_MAXINT;")
|
|
def write_conversion(self):
|
|
self.wrapper.write_code(
|
|
code=None,
|
|
failure_expression="!PyLong_Check(py_retval)",
|
|
failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be an long");')
|
|
self.wrapper.write_code("retval = PyLong_AsLongLong(py_retval);")
|
|
|
|
class UInt64Param(Parameter):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'guint64')
|
|
|
|
def convert_c2py(self):
|
|
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
|
|
self.wrapper.write_code(code=("py_%s = PyLong_FromUnsignedLongLong(%s);" %
|
|
(self.name, self.name)),
|
|
cleanup=("Py_DECREF(py_%s);" % self.name))
|
|
self.wrapper.add_pyargv_item("py_%s" % self.name)
|
|
|
|
class UInt64Return(ReturnType):
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'guint64')
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return -G_MAXINT;")
|
|
def write_conversion(self):
|
|
self.wrapper.write_code(
|
|
code=None,
|
|
failure_expression="!PyLong_Check(py_retval)",
|
|
failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be an long");')
|
|
self.wrapper.write_code("retval = PyLong_AsUnsignedLongLongMask(py_retval);")
|
|
|
|
class ULongParam(Parameter):
|
|
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'gulong')
|
|
|
|
def convert_c2py(self):
|
|
self.wrapper.add_declaration("PyObject *py_%s;" % self.name)
|
|
self.wrapper.write_code(code=("py_%s = PyLong_FromUnsignedLong(%s);" %
|
|
(self.name, self.name)),
|
|
cleanup=("Py_DECREF(py_%s);" % self.name))
|
|
self.wrapper.add_pyargv_item("py_%s" % self.name)
|
|
|
|
class ULongReturn(ReturnType):
|
|
def get_c_type(self):
|
|
return self.props.get('c_type', 'gulong')
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("%s retval;" % self.get_c_type())
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return -G_MAXINT;")
|
|
def write_conversion(self):
|
|
self.wrapper.write_code(
|
|
code=None,
|
|
failure_expression="!PyLong_Check(py_retval)",
|
|
failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be an long");')
|
|
self.wrapper.write_code("retval = PyLong_AsUnsignedLongMask(py_retval);")
|
|
|
|
class ConstStringReturn(ReturnType):
|
|
|
|
def get_c_type(self):
|
|
return "const gchar *"
|
|
|
|
def write_decl(self):
|
|
self.wrapper.add_declaration("const gchar *retval;")
|
|
|
|
def write_error_return(self):
|
|
self.wrapper.write_code("return NULL;")
|
|
|
|
def write_conversion(self):
|
|
self.wrapper.write_code(
|
|
code=None,
|
|
failure_expression="!PyString_Check(py_retval)",
|
|
failure_cleanup='PyErr_SetString(PyExc_TypeError, "retval should be a string");')
|
|
self.wrapper.write_code("retval = g_strdup(PyString_AsString(py_retval));")
|
|
|
|
class StringArrayArg(ArgType):
|
|
"""Arg type for NULL-terminated string pointer arrays (GStrv, aka gchar**)."""
|
|
def write_return(self, ptype, ownsreturn, info):
|
|
if ownsreturn:
|
|
raise NotImplementedError ()
|
|
else:
|
|
info.varlist.add("gchar", "**ret")
|
|
info.codeafter.append(" if (ret) {\n"
|
|
" guint size = g_strv_length(ret);\n"
|
|
" PyObject *py_ret = PyTuple_New(size);\n"
|
|
" gint i;\n"
|
|
" for (i = 0; i < size; i++)\n"
|
|
" PyTuple_SetItem(py_ret, i,\n"
|
|
" PyString_FromString(ret[i]));\n"
|
|
" return py_ret;\n"
|
|
" }\n"
|
|
" return PyTuple_New (0);\n")
|
|
|
|
|
|
matcher.register('GstClockTime', UInt64Arg())
|
|
matcher.register('GstElementFactoryListType', UInt64Arg())
|
|
matcher.register('GstClockTimeDiff', Int64Arg())
|
|
matcher.register('xmlNodePtr', XmlNodeArg())
|
|
matcher.register('xmlDocPtr', XmlDocArg())
|
|
matcher.register('GstCaps', GstCapsArg()) #FIXME: does this work?
|
|
matcher.register('GstCaps*', GstCapsArg()) #FIXME: does this work?
|
|
matcher.register('const-GstCaps*', GstCapsArg())
|
|
matcher.register('GstIterator*', GstIteratorArg())
|
|
|
|
arg = PointerArg('gpointer', 'G_TYPE_POINTER')
|
|
matcher.register('GstClockID', arg)
|
|
|
|
for typename in ["GstPlugin", "GstStructure", "GstTagList", "GError", "GstDate", "GstSegment"]:
|
|
matcher.register_reverse(typename, GBoxedParam)
|
|
matcher.register_reverse_ret(typename, GBoxedReturn)
|
|
|
|
for typename in ["GstBuffer*", "const-GstBuffer*", "GstEvent*", "const-GstEvent*", "GstMessage*", "const-GstMessage*", "GstQuery*", "const-GstQuery*"]:
|
|
matcher.register(typename, GstMiniObjectArg())
|
|
matcher.register_reverse(typename, GstMiniObjectParam)
|
|
matcher.register_reverse_ret(typename, GstMiniObjectReturn)
|
|
|
|
for typename in ["gint64", "GstClockTimeDiff"]:
|
|
matcher.register_reverse(typename, Int64Param)
|
|
matcher.register_reverse_ret(typename, Int64Return)
|
|
|
|
for typename in ["guint64", "GstClockTime", "GstElementFactoryListType"]:
|
|
matcher.register_reverse(typename, UInt64Param)
|
|
matcher.register_reverse_ret(typename, UInt64Return)
|
|
|
|
matcher.register_reverse_ret("const-gchar*", ConstStringReturn)
|
|
|
|
matcher.register_reverse("GType", IntParam)
|
|
matcher.register_reverse_ret("GType", IntReturn)
|
|
|
|
matcher.register_reverse("gulong", ULongParam)
|
|
matcher.register_reverse_ret("gulong", ULongReturn)
|
|
|
|
matcher.register("GStrv", StringArrayArg())
|
|
|
|
del arg
|