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/* -*- c++ -*- */
/*
* Copyright 2019 Ettus Research, a National Instruments Brand.
* Copyright 2020 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gr_uhd_common.h"
#include "rfnoc_rx_streamer_impl.h"
#include <gnuradio/io_signature.h>
#include <uhd/convert.hpp>
#include <uhd/rfnoc/node.hpp>
const pmt::pmt_t EOB_KEY = pmt::string_to_symbol("rx_eob");
const pmt::pmt_t CMD_TIME_KEY = pmt::mp("time");
const pmt::pmt_t CMD_CHAN_KEY = pmt::mp("chan");
const pmt::pmt_t MSG_PORT_RFNOC = pmt::mp("rfnoc");
namespace gr {
namespace uhd {
/******************************************************************************
* Factory and Structors
*****************************************************************************/
rfnoc_rx_streamer::sptr rfnoc_rx_streamer::make(rfnoc_graph::sptr graph,
const size_t num_chans,
const ::uhd::stream_args_t& stream_args,
const size_t vlen,
const bool issue_stream_cmd_on_start)
{
return gnuradio::make_block_sptr<rfnoc_rx_streamer_impl>(
graph, num_chans, stream_args, vlen, issue_stream_cmd_on_start);
}
rfnoc_rx_streamer_impl::rfnoc_rx_streamer_impl(rfnoc_graph::sptr graph,
const size_t num_chans,
const ::uhd::stream_args_t& stream_args,
const size_t vlen,
const bool issue_stream_cmd_on_start)
: gr::sync_block(
"rfnoc_rx_streamer",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(
num_chans,
num_chans,
::uhd::convert::get_bytes_per_item(stream_args.cpu_format) * vlen)),
d_num_chans(num_chans),
d_itemsize(::uhd::convert::get_bytes_per_item(stream_args.cpu_format)),
d_vlen(vlen),
d_graph(graph),
d_stream_args(stream_args),
d_streamer(graph->create_rx_streamer(num_chans, stream_args)),
d_unique_id(
std::dynamic_pointer_cast<::uhd::rfnoc::node_t>(d_streamer)->get_unique_id()),
d_issue_stream_cmd_on_start(issue_stream_cmd_on_start)
{
// nop
}
rfnoc_rx_streamer_impl::~rfnoc_rx_streamer_impl() {}
/******************************************************************************
* GNU Radio API
*****************************************************************************/
bool rfnoc_rx_streamer_impl::check_topology(int, int)
{
GR_LOG_DEBUG(d_logger, "Committing graph...");
d_graph->commit();
return true;
}
bool rfnoc_rx_streamer_impl::start()
{
if (d_issue_stream_cmd_on_start) {
// Start the streamers
::uhd::stream_cmd_t stream_cmd(::uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
if (d_start_time_set) {
stream_cmd.stream_now = false;
stream_cmd.time_spec = d_start_time;
d_start_time_set = false;
} else {
stream_cmd.stream_now = true;
}
GR_LOG_DEBUG(d_logger, "Sending start stream command...");
d_streamer->issue_stream_cmd(stream_cmd);
} else {
GR_LOG_DEBUG(d_logger, "Starting RX streamer without stream command...");
}
return true;
}
bool rfnoc_rx_streamer_impl::stop()
{
// If we issue a stream command on start, we also issue it on stop
if (d_issue_stream_cmd_on_start) {
::uhd::stream_cmd_t stream_cmd(::uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
d_streamer->issue_stream_cmd(stream_cmd);
}
flush();
return true;
}
int rfnoc_rx_streamer_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const size_t max_num_items_to_rx = noutput_items * d_vlen;
const size_t num_items_recvd =
d_streamer->recv(output_items, max_num_items_to_rx, d_metadata, d_timeout);
const size_t num_vecs_recvd = num_items_recvd / d_vlen;
if (num_items_recvd % d_vlen) {
// TODO: Create a fix for this. What will happen is that a partial
// vector will be received, but it won't be available in the output_items.
// We need to store the partial vector, and prepend it to the next
// run.
GR_LOG_WARN(d_logger, "Received fractional vector! Expect signal fragmentation.");
}
using ::uhd::rx_metadata_t;
switch (d_metadata.error_code) {
case rx_metadata_t::ERROR_CODE_NONE:
break;
case rx_metadata_t::ERROR_CODE_TIMEOUT:
// its ok to timeout, perhaps the user is doing finite streaming
GR_LOG_DEBUG(d_logger, "UHD recv() call timed out.");
break;
case rx_metadata_t::ERROR_CODE_OVERFLOW:
// Not much we can do about overruns here, and they get signalled via the
// UHD logging interface
break;
default:
GR_LOG_WARN(
d_logger,
str(boost::format("RFNoC Streamer block received error %s (Code: 0x%x)") %
d_metadata.strerror() % d_metadata.error_code));
}
if (d_metadata.end_of_burst) {
for (size_t i = 0; i < output_items.size(); i++) {
add_item_tag(i, nitems_written(i) + num_vecs_recvd - 1, EOB_KEY, pmt::PMT_T);
}
}
return num_vecs_recvd;
}
/******************************************************************************
* rfnoc_rx_streamer API
*****************************************************************************/
void rfnoc_rx_streamer_impl::set_start_time(const ::uhd::time_spec_t& time)
{
d_start_time_set = true;
d_start_time = time;
}
/******************************************************************************
* Helpers
*****************************************************************************/
void rfnoc_rx_streamer_impl::flush()
{
constexpr size_t nbytes = 4096;
const size_t nchan = d_streamer->get_num_channels();
std::vector<std::vector<uint8_t>> buffs(nchan, std::vector<uint8_t>(nbytes));
gr_vector_void_star outputs;
for (size_t i = 0; i < nchan; i++) {
outputs.push_back(&buffs[i].front());
}
const size_t itemsize = output_signature()->sizeof_stream_item(0);
while (true) {
d_streamer->recv(outputs, nbytes / itemsize / d_vlen, d_metadata, 0.0);
if (d_metadata.error_code != ::uhd::rx_metadata_t::ERROR_CODE_NONE) {
break;
}
}
}
} /* namespace uhd */
} /* namespace gr */
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