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/*------------------------------------------------------------------------
* Copyright 2009 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#include "zbarmodule.h"
static char scanner_doc[] = PyDoc_STR(
"low level intensity sample stream scanner. identifies \"bar\" edges"
"and measures width between them.\n"
"\n"
"FIXME.");
static zbarScanner *scanner_new(PyTypeObject *type, PyObject *args,
PyObject *kwds)
{
zbarDecoder *decoder = NULL;
static char *kwlist[] = { "decoder", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O!", kwlist, &decoder,
zbarDecoder_Type))
return (NULL);
zbarScanner *self = (zbarScanner *)type->tp_alloc(type, 0);
if (!self)
return (NULL);
zbar_decoder_t *zdcode = NULL;
if (decoder) {
Py_INCREF(decoder);
self->decoder = decoder;
zdcode = decoder->zdcode;
}
self->zscn = zbar_scanner_create(zdcode);
if (!self->zscn) {
Py_DECREF(self);
return (NULL);
}
return (self);
}
static int scanner_traverse(zbarScanner *self, visitproc visit, void *arg)
{
Py_VISIT(self->decoder);
return (0);
}
static int scanner_clear(zbarScanner *self)
{
Py_CLEAR(self->decoder);
return (0);
}
static void scanner_dealloc(zbarScanner *self)
{
scanner_clear(self);
zbar_scanner_destroy(self->zscn);
((PyObject *)self)->ob_type->tp_free((PyObject *)self);
}
static PyObject *scanner_get_width(zbarScanner *self, void *closure)
{
unsigned int width = zbar_scanner_get_width(self->zscn);
#if PY_MAJOR_VERSION >= 3
return (PyLong_FromLong(width));
#else
return (PyInt_FromLong(width));
#endif
}
static zbarEnumItem *scanner_get_color(zbarScanner *self, void *closure)
{
zbar_color_t zcol = zbar_scanner_get_color(self->zscn);
assert(zcol == ZBAR_BAR || zcol == ZBAR_SPACE);
struct module_state *st = GETMODSTATE();
zbarEnumItem *color = st->color_enum[zcol];
Py_INCREF((PyObject *)color);
return (color);
}
static PyGetSetDef scanner_getset[] = {
{
"color",
(getter)scanner_get_color,
},
{
"width",
(getter)scanner_get_width,
},
{
NULL,
},
};
static PyObject *scanner_reset(zbarScanner *self, PyObject *args,
PyObject *kwds)
{
static char *kwlist[] = { NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwds, "", kwlist))
return (NULL);
zbar_scanner_reset(self->zscn);
Py_RETURN_NONE;
}
static PyObject *scanner_new_scan(zbarScanner *self, PyObject *args,
PyObject *kwds)
{
static char *kwlist[] = { NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwds, "", kwlist))
return (NULL);
zbar_scanner_new_scan(self->zscn);
Py_RETURN_NONE;
}
static zbarEnumItem *scanner_scan_y(zbarScanner *self, PyObject *args,
PyObject *kwds)
{
/* FIXME should accept sequence of values */
int y = 0;
static char *kwlist[] = { "y", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwds, "i", kwlist, &y))
return (NULL);
zbar_symbol_type_t sym = zbar_scan_y(self->zscn, y);
if (PyErr_Occurred())
/* propagate errors during callback */
return (NULL);
if (sym == ZBAR_NONE) {
/* hardcode most common case */
struct module_state *st = GETMODSTATE();
Py_INCREF((PyObject *)st->symbol_NONE);
return (st->symbol_NONE);
}
return (zbarSymbol_LookupEnum(sym));
}
static PyMethodDef scanner_methods[] = {
{
"reset",
(PyCFunction)scanner_reset,
METH_VARARGS | METH_KEYWORDS,
},
{
"new_scan",
(PyCFunction)scanner_new_scan,
METH_VARARGS | METH_KEYWORDS,
},
{
"scan_y",
(PyCFunction)scanner_scan_y,
METH_VARARGS | METH_KEYWORDS,
},
{
NULL,
},
};
PyTypeObject zbarScanner_Type = {
PyVarObject_HEAD_INIT(NULL, 0).tp_name = "zbar.Scanner",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
.tp_doc = scanner_doc,
.tp_basicsize = sizeof(zbarScanner),
.tp_new = (newfunc)scanner_new,
.tp_traverse = (traverseproc)scanner_traverse,
.tp_clear = (inquiry)scanner_clear,
.tp_dealloc = (destructor)scanner_dealloc,
.tp_getset = scanner_getset,
.tp_methods = scanner_methods,
};
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