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/* -*- c++ -*- */
/*
* Copyright 2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <iostream>
#include <gnuradio/rpcregisterhelpers.h>
#include <pythread.h>
#include <boost/format.hpp>
enum pyport_t {
PYPORT_STRING,
PYPORT_FLOAT
};
int pycallback_object_count = 500;
// a simple to-PMT converter template class-function
template <class myType> class pmt_assist
{
public:
static pmt::pmt_t make(myType _val)
{
return pmt::mp(_val);
}
};
/* template specializations for vectors that can't use pmt::mp() */
template<>
pmt::pmt_t pmt_assist<std::vector<float> >::make(std::vector<float> _val)
{
return pmt::init_f32vector(_val.size(), _val);
}
template<>
pmt::pmt_t pmt_assist<std::vector<gr_complex> >::make(std::vector<gr_complex> _val)
{
return pmt::init_c32vector(_val.size(), _val);
}
template <class myType> class pycallback_object
{
public:
pycallback_object(std::string name, std::string functionbase,
std::string units, std::string desc,
myType min, myType max, myType deflt,
DisplayType dtype) :
d_callback(NULL),
d_functionbase(functionbase), d_units(units), d_desc(desc),
d_min(min), d_max(max), d_deflt(deflt), d_dtype(dtype),
d_name(name), d_id(pycallback_object_count++)
{
d_callback = NULL;
setup_rpc();
}
void add_rpc_variable(rpcbasic_sptr s)
{
d_rpc_vars.push_back(s);
}
myType get() {
myType rVal = d_deflt;
if(d_callback == NULL) {
printf("WARNING: pycallback_object get() called without py callback set!\n");
return rVal;
}
else {
// obtain PyGIL
PyGILState_STATE state = PyGILState_Ensure();
PyObject *func;
//PyObject *arglist;
PyObject *result;
func = (PyObject *) d_callback; // Get Python function
//arglist = Py_BuildValue(""); // Build argument list
result = PyEval_CallObject(func,NULL); // Call Python
//result = PyEval_CallObject(func,arglist); // Call Python
//Py_DECREF(arglist); // Trash arglist
if(result) { // If no errors, return double
rVal = pyCast(result);
}
Py_XDECREF(result);
// release PyGIL
PyGILState_Release(state);
return rVal;
}
}
void set_callback(PyObject *cb)
{
d_callback = cb;
}
void setup_rpc()
{
#ifdef GR_CTRLPORT
add_rpc_variable(
rpcbasic_sptr(new rpcbasic_register_get<pycallback_object, myType>(
(boost::format("%s%d") % d_name % d_id).str() , d_functionbase.c_str(),
this, &pycallback_object::get, pmt_assist<myType>::make(d_min),
pmt_assist<myType>::make(d_max), pmt_assist<myType>::make(d_deflt),
d_units.c_str(), d_desc.c_str(), RPC_PRIVLVL_MIN, d_dtype)));
#endif /* GR_CTRLPORT */
}
private:
PyObject* d_callback;
std::string d_functionbase, d_units, d_desc;
myType d_min, d_max, d_deflt;
DisplayType d_dtype;
/* This is a fall-through converter in case someone tries to call pyCast on an
* object type for which there isn't a template specialization (located below
* this class) function. This function should never get called, and it is
* unknown if changing the return type from myType to 'void' will break
* something. */
myType pyCast(PyObject* obj) {
printf("TYPE NOT IMPLEMENTED!\n");
assert(0);
// the following is to make compilers happy only.
myType dummy;
return(dummy);
};
std::vector<boost::any> d_rpc_vars; // container for all RPC variables
std::string d_name;
int d_id;
};
// template specialization conversion functions
// get data out of the PyObject and into the real world
template<>
std::string pycallback_object<std::string>::pyCast(PyObject* obj)
{
return std::string(PyString_AsString(obj));
}
template<>
double pycallback_object<double>::pyCast(PyObject* obj)
{
return PyFloat_AsDouble(obj);
}
template<>
float pycallback_object<float>::pyCast(PyObject* obj)
{
return (float)PyFloat_AsDouble(obj);
}
template<>
int pycallback_object<int>::pyCast(PyObject* obj)
{
return PyInt_AsLong(obj);
}
template<>
std::vector<float> pycallback_object<std::vector<float> >::pyCast(PyObject* obj)
{
int size = PyObject_Size(obj);
std::vector<float> rval(size);
for(int i=0; i<size; i++) {
rval[i] = (float)PyFloat_AsDouble(PyList_GetItem(obj, i));
}
return rval;
}
template<>
std::vector<gr_complex> pycallback_object<std::vector<gr_complex> >::pyCast(PyObject* obj)
{
int size = PyObject_Size(obj);
std::vector<gr_complex> rval(size);
for(int i=0; i<size; i++){ rval[i] = \
gr_complex((float)PyComplex_RealAsDouble(PyList_GetItem(obj, i)),
(float)PyComplex_ImagAsDouble(PyList_GetItem(obj, i)));
}
return rval;
}
// TODO: add more template specializations as needed!
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