zbar_image_scanner_t *zbar_image_scanner_create ()
{
zbar_image_scanner_t *iscn = calloc(1, sizeof(zbar_image_scanner_t));
if(!iscn)
return(NULL);
iscn->dcode = zbar_decoder_create();
iscn->scn = zbar_scanner_create(iscn->dcode);
if(!iscn->dcode || !iscn->scn) {
zbar_image_scanner_destroy(iscn);
return(NULL);
}
zbar_decoder_set_userdata(iscn->dcode, iscn);
zbar_decoder_set_handler(iscn->dcode, symbol_handler);
#ifdef ENABLE_QRCODE
iscn->qr = _zbar_qr_create();
#endif
/* apply default configuration */
CFG(iscn, ZBAR_CFG_X_DENSITY) = 1;
CFG(iscn, ZBAR_CFG_Y_DENSITY) = 1;
zbar_image_scanner_set_config(iscn, 0, ZBAR_CFG_POSITION, 1);
zbar_image_scanner_set_config(iscn, 0, ZBAR_CFG_UNCERTAINTY, 2);
zbar_image_scanner_set_config(iscn, ZBAR_QRCODE, ZBAR_CFG_UNCERTAINTY, 0);
zbar_image_scanner_set_config(iscn, ZBAR_CODE128, ZBAR_CFG_UNCERTAINTY, 0);
zbar_image_scanner_set_config(iscn, ZBAR_CODE93, ZBAR_CFG_UNCERTAINTY, 0);
zbar_image_scanner_set_config(iscn, ZBAR_CODE39, ZBAR_CFG_UNCERTAINTY, 0);
zbar_image_scanner_set_config(iscn, ZBAR_CODABAR, ZBAR_CFG_UNCERTAINTY, 1);
zbar_image_scanner_set_config(iscn, ZBAR_COMPOSITE, ZBAR_CFG_UNCERTAINTY, 0);
return(iscn);
}
static int
decoder_clear (zbarDecoder *self)
{
zbar_decoder_set_handler(self->zdcode, NULL);
zbar_decoder_set_userdata(self->zdcode, NULL);
Py_CLEAR(self->handler);
Py_CLEAR(self->args);
return(0);
}
static PyObject*
decoder_set_handler (zbarDecoder *self,
PyObject *args,
PyObject *kwds)
{
PyObject *handler = Py_None;
PyObject *closure = Py_None;
static char *kwlist[] = { "handler", "closure", NULL };
if(!PyArg_ParseTupleAndKeywords(args, kwds, "|OO", kwlist,
&handler, &closure))
return(NULL);
if(handler != Py_None && !PyCallable_Check(handler)) {
PyErr_Format(PyExc_ValueError, "handler %.50s is not callable",
handler->ob_type->tp_name);
return(NULL);
}
Py_CLEAR(self->handler);
Py_CLEAR(self->args);
if(handler != Py_None) {
self->args = PyTuple_New(2);
if(!self->args)
return(NULL);
Py_INCREF(self);
Py_INCREF(closure);
PyTuple_SET_ITEM(self->args, 0, (PyObject*)self);
PyTuple_SET_ITEM(self->args, 1, closure);
Py_INCREF(handler);
self->handler = handler;
zbar_decoder_set_handler(self->zdcode, decode_handler);
}
else {
self->handler = self->args = NULL;
zbar_decoder_set_handler(self->zdcode, NULL);
}
Py_RETURN_NONE;
}