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/* -*- c++ -*- */
/*
* Copyright 2019 Free Software Foundation, Inc.
* Copyright 2023 Daniel Estevez <daniel@destevez.net>
*
* This file is part of gr-satellites
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This is a copy of the GNU Radio Selector block modified to consume all the
* items that are available on inactive inputs. This is required to use selector
* blocks to bypass sections of the flowgraph. See
* https://github.com/gnuradio/gnuradio/issues/6792
* for more information.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "selector_impl.h"
#include <gnuradio/io_signature.h>
#include <cstring>
#include <stdexcept>
namespace gr {
namespace satellites {
selector::sptr
selector::make(size_t itemsize, unsigned int input_index, unsigned int output_index)
{
return gnuradio::make_block_sptr<selector_impl>(itemsize, input_index, output_index);
}
selector_impl::selector_impl(size_t itemsize,
unsigned int input_index,
unsigned int output_index)
: block("selector",
io_signature::make(1, -1, itemsize),
io_signature::make(1, -1, itemsize)),
d_itemsize(itemsize),
d_input_index(input_index),
d_output_index(output_index),
d_num_inputs(0),
d_num_outputs(0),
d_enabled(true)
{
message_port_register_in(pmt::mp("en"));
set_msg_handler(pmt::mp("en"),
[this](const pmt::pmt_t& msg) { this->handle_enable(msg); });
message_port_register_in(pmt::mp("iindex"));
set_msg_handler(pmt::mp("iindex"),
[this](const pmt::pmt_t& msg) { this->handle_msg_input_index(msg); });
message_port_register_in(pmt::mp("oindex"));
set_msg_handler(pmt::mp("oindex"), [this](const pmt::pmt_t& msg) {
this->handle_msg_output_index(msg);
});
set_tag_propagation_policy(TPP_CUSTOM);
}
selector_impl::~selector_impl() {}
void selector_impl::set_input_index(unsigned int input_index)
{
gr::thread::scoped_lock l(d_mutex);
if (input_index < d_num_inputs) {
d_input_index = input_index;
} else {
throw std::out_of_range("input_index must be < ninputs");
}
}
void selector_impl::set_output_index(unsigned int output_index)
{
gr::thread::scoped_lock l(d_mutex);
if (output_index < d_num_outputs) {
d_output_index = output_index;
} else {
throw std::out_of_range("output_index must be < noutputs");
}
}
void selector_impl::handle_msg_input_index(const pmt::pmt_t& msg)
{
pmt::pmt_t data = pmt::cdr(msg);
if (pmt::is_integer(data)) {
const unsigned int new_port = pmt::to_long(data);
if (new_port < d_num_inputs) {
set_input_index(new_port);
} else {
d_logger->warn("handle_msg_input_index: port index {:d} greater than "
"available ports {:d}.",
new_port,
d_num_inputs);
}
} else {
d_logger->warn(
"handle_msg_input_index: Non-PMT type received, expecting integer PMT");
}
}
void selector_impl::handle_msg_output_index(const pmt::pmt_t& msg)
{
pmt::pmt_t data = pmt::cdr(msg);
if (pmt::is_integer(data)) {
const unsigned int new_port = pmt::to_long(data);
if (new_port < d_num_outputs) {
set_output_index(new_port);
} else {
d_logger->warn("handle_msg_input_index: port index {:d} greater than "
"available ports {:d}.",
new_port,
d_num_inputs);
}
} else {
d_logger->warn(
"handle_msg_output_index: Non-PMT type received, expecting integer PMT");
}
}
void selector_impl::handle_enable(const pmt::pmt_t& msg)
{
if (pmt::is_bool(msg)) {
bool en = pmt::to_bool(msg);
gr::thread::scoped_lock l(d_mutex);
d_enabled = en;
} else {
d_logger->warn("handle_enable: Non-PMT type received, expecting Boolean PMT");
}
}
void selector_impl::forecast(int noutput_items, gr_vector_int& ninput_items_required)
{
unsigned ninputs = ninput_items_required.size();
for (unsigned i = 0; i < ninputs; i++) {
ninput_items_required[i] = 0;
}
// When we have multiple inputs and are requested to produce only one item,
// we lie and say that we can produce it for free. This hack is required in
// order to ensure that general_work() gets called when there is only input
// in some of the inactive inputs. This achieves having general_work()
// consume that input, which may unblock the production of items for the
// active input elsewhere in the flowgraph.
if ((ninputs == 1) || (noutput_items > 1)) {
gr::thread::scoped_lock l(d_mutex);
ninput_items_required[d_input_index] = noutput_items;
} else if (ninputs == 2) {
// If we lie and have exactly 2 inputs, tell the runtime that we need to
// have some items (to dump them) on the inactive input. If we have more
// inputs we cannot do this trick because we don't know in which
// inactive input the items might be present.
gr::thread::scoped_lock l(d_mutex);
ninput_items_required[1 - d_input_index] = 1;
}
}
bool selector_impl::check_topology(int ninputs, int noutputs)
{
if ((int)d_input_index < ninputs && (int)d_output_index < noutputs) {
d_num_inputs = (unsigned int)ninputs;
d_num_outputs = (unsigned int)noutputs;
return true;
}
d_logger->warn("check_topology: Input or Output index greater than number of ports");
return false;
}
int selector_impl::general_work(int noutput_items,
gr_vector_int& ninput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const auto in = reinterpret_cast<const uint8_t**>(input_items.data());
auto out = reinterpret_cast<uint8_t**>(output_items.data());
gr::thread::scoped_lock l(d_mutex);
unsigned int to_copy = std::min(ninput_items[d_input_index], noutput_items);
if (d_enabled) {
auto nread = nitems_read(d_input_index);
auto nwritten = nitems_written(d_output_index);
std::vector<tag_t> tags;
get_tags_in_window(tags, d_input_index, 0, to_copy);
for (auto tag : tags) {
tag.offset -= (nread - nwritten);
add_item_tag(d_output_index, tag);
}
std::copy(in[d_input_index],
in[d_input_index] + to_copy * d_itemsize,
out[d_output_index]);
produce(d_output_index, to_copy);
}
for (unsigned int in_index = 0; in_index < ninput_items.size(); ++in_index) {
const auto to_consume =
in_index == d_input_index ? to_copy : ninput_items[in_index];
consume(in_index, to_consume);
}
return WORK_CALLED_PRODUCE;
}
void selector_impl::setup_rpc()
{
#ifdef GR_CTRLPORT
add_rpc_variable(rpcbasic_sptr(new rpcbasic_register_handler<selector>(
alias(), "en", "", "Enable", RPC_PRIVLVL_MIN, DISPNULL)));
#endif /* GR_CTRLPORT */
}
} /* namespace satellites */
} /* namespace gr */
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