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/*
* Copyright 2011-2012 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 <runtime_block_gateway.h>
#include <gr_io_signature.h>
#include <iostream>
#include <boost/bind.hpp>
/***********************************************************************
* Helper routines
**********************************************************************/
template <typename OutType, typename InType>
void copy_pointers(OutType &out, const InType &in){
out.resize(in.size());
for (size_t i = 0; i < in.size(); i++){
out[i] = (void *)(in[i]);
}
}
/***********************************************************************
* The gr_block gateway implementation class
**********************************************************************/
class runtime_block_gateway_impl : public runtime_block_gateway{
public:
runtime_block_gateway_impl(
gr_feval_ll *handler,
const std::string &name,
gr_io_signature_sptr in_sig,
gr_io_signature_sptr out_sig,
const gr_block_gw_work_type work_type,
const unsigned factor
):
gr_block(name, in_sig, out_sig),
_handler(handler),
_work_type(work_type)
{
switch(_work_type){
case GR_BLOCK_GW_WORK_GENERAL:
_decim = 1; //not relevant, but set anyway
_interp = 1; //not relevant, but set anyway
break;
case GR_BLOCK_GW_WORK_SYNC:
_decim = 1;
_interp = 1;
this->set_fixed_rate(true);
break;
case GR_BLOCK_GW_WORK_DECIM:
_decim = factor;
_interp = 1;
break;
case GR_BLOCK_GW_WORK_INTERP:
_decim = 1;
_interp = factor;
this->set_output_multiple(_interp);
break;
}
}
/*******************************************************************
* Overloads for various scheduler-called functions
******************************************************************/
void forecast(
int noutput_items,
gr_vector_int &ninput_items_required
){
switch(_work_type){
case GR_BLOCK_GW_WORK_GENERAL:
_message.action = gr_block_gw_message_type::ACTION_FORECAST;
_message.forecast_args_noutput_items = noutput_items;
_message.forecast_args_ninput_items_required = ninput_items_required;
_handler->calleval(0);
ninput_items_required = _message.forecast_args_ninput_items_required;
return;
default:
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++)
ninput_items_required[i] = fixed_rate_noutput_to_ninput(noutput_items);
return;
}
}
int general_work(
int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items
){
switch(_work_type){
case GR_BLOCK_GW_WORK_GENERAL:
_message.action = gr_block_gw_message_type::ACTION_GENERAL_WORK;
_message.general_work_args_noutput_items = noutput_items;
_message.general_work_args_ninput_items = ninput_items;
copy_pointers(_message.general_work_args_input_items, input_items);
_message.general_work_args_output_items = output_items;
_handler->calleval(0);
return _message.general_work_args_return_value;
default:
int r = work (noutput_items, input_items, output_items);
if (r > 0) consume_each(r*_decim/_interp);
return r;
}
}
int work(
int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items
){
_message.action = gr_block_gw_message_type::ACTION_WORK;
_message.work_args_ninput_items = fixed_rate_noutput_to_ninput(noutput_items);
if (_message.work_args_ninput_items == 0) return -1;
_message.work_args_noutput_items = noutput_items;
copy_pointers(_message.work_args_input_items, input_items);
_message.work_args_output_items = output_items;
_handler->calleval(0);
return _message.work_args_return_value;
}
int fixed_rate_noutput_to_ninput(int noutput_items){
return (noutput_items*_decim/_interp) + history() - 1;
}
int fixed_rate_ninput_to_noutput(int ninput_items){
return std::max(0, ninput_items - (int)history() + 1)*_interp/_decim;
}
bool start(void){
_message.action = gr_block_gw_message_type::ACTION_START;
_handler->calleval(0);
return _message.start_args_return_value;
}
bool stop(void){
_message.action = gr_block_gw_message_type::ACTION_STOP;
_handler->calleval(0);
return _message.stop_args_return_value;
}
gr_block_gw_message_type &gr_block_message(void){
return _message;
}
private:
gr_feval_ll *_handler;
gr_block_gw_message_type _message;
const gr_block_gw_work_type _work_type;
unsigned _decim, _interp;
};
boost::shared_ptr<runtime_block_gateway> runtime_make_block_gateway(
gr_feval_ll *handler,
const std::string &name,
gr_io_signature_sptr in_sig,
gr_io_signature_sptr out_sig,
const gr_block_gw_work_type work_type,
const unsigned factor
){
return boost::shared_ptr<runtime_block_gateway>(
new runtime_block_gateway_impl(handler, name, in_sig, out_sig,
work_type, factor)
);
}
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