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//
// Copyright 2019 Ettus Research, a National Instruments Brand
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/rfnoc/defaults.hpp>
#include <uhdlib/rfnoc/node_accessor.hpp>
#include <uhdlib/rfnoc/rfnoc_rx_streamer.hpp>
#include <atomic>
#include <thread>
using namespace std::chrono_literals;
;
using namespace uhd;
using namespace uhd::rfnoc;
const std::string STREAMER_ID = "RxStreamer";
static std::atomic<uint64_t> streamer_inst_ctr;
rfnoc_rx_streamer::rfnoc_rx_streamer(
const size_t num_chans, const uhd::stream_args_t stream_args)
: rx_streamer_impl<chdr_rx_data_xport>(num_chans, stream_args)
, _unique_id(STREAMER_ID + "#" + std::to_string(streamer_inst_ctr++))
, _stream_args(stream_args)
{
set_overrun_handler([this]() { this->_handle_overrun(); });
// No block to which to forward properties or actions
set_prop_forwarding_policy(forwarding_policy_t::DROP);
set_action_forwarding_policy(forwarding_policy_t::DROP);
register_action_handler(ACTION_KEY_RX_EVENT,
[this](const res_source_info& src, action_info::sptr action) {
rx_event_action_info::sptr rx_event_action =
std::dynamic_pointer_cast<rx_event_action_info>(action);
if (!rx_event_action) {
RFNOC_LOG_WARNING("Received invalid RX event action!");
return;
}
_handle_rx_event_action(src, rx_event_action);
});
register_action_handler(ACTION_KEY_STREAM_CMD,
[this](const res_source_info& src, action_info::sptr action) {
stream_cmd_action_info::sptr stream_cmd_action =
std::dynamic_pointer_cast<stream_cmd_action_info>(action);
if (!stream_cmd_action) {
RFNOC_LOG_WARNING("Received invalid stream command action!");
return;
}
_handle_stream_cmd_action(src, stream_cmd_action);
});
// Initialize properties
_scaling_in.reserve(num_chans);
_samp_rate_in.reserve(num_chans);
_tick_rate_in.reserve(num_chans);
_type_in.reserve(num_chans);
for (size_t i = 0; i < num_chans; i++) {
_register_props(i, stream_args.otw_format);
}
node_accessor_t node_accessor{};
node_accessor.init_props(this);
}
std::string rfnoc_rx_streamer::get_unique_id() const
{
return _unique_id;
}
size_t rfnoc_rx_streamer::get_num_input_ports() const
{
return get_num_channels();
}
size_t rfnoc_rx_streamer::get_num_output_ports() const
{
return 0;
}
void rfnoc_rx_streamer::issue_stream_cmd(const stream_cmd_t& stream_cmd)
{
if (get_num_channels() > 1 and stream_cmd.stream_now
and stream_cmd.stream_mode != stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS) {
throw uhd::runtime_error(
"Invalid recv stream command - stream now on multiple channels in a "
"single streamer will fail to time align.");
}
auto cmd = stream_cmd_action_info::make(stream_cmd.stream_mode);
cmd->stream_cmd = stream_cmd;
for (size_t i = 0; i < get_num_channels(); i++) {
const res_source_info info(res_source_info::INPUT_EDGE, i);
post_action(info, cmd);
}
}
const uhd::stream_args_t& rfnoc_rx_streamer::get_stream_args() const
{
return _stream_args;
}
bool rfnoc_rx_streamer::check_topology(
const std::vector<size_t>& connected_inputs,
const std::vector<size_t>& connected_outputs)
{
// Check that all channels are connected
if (connected_inputs.size() != get_num_input_ports()) {
return false;
}
// Call base class to check that connections are valid
return node_t::check_topology(connected_inputs, connected_outputs);
}
void rfnoc_rx_streamer::_handle_overrun()
{
if (_overrun_handling_mode) {
RFNOC_LOG_TRACE("Requesting restart from overrun-reporting node...");
post_action({res_source_info::INPUT_EDGE, _overrun_channel},
action_info::make(ACTION_KEY_RX_RESTART_REQ));
}
}
void rfnoc_rx_streamer::_register_props(const size_t chan,
const std::string& otw_format)
{
// Create actual properties and store them
_scaling_in.push_back(property_t<double>(
PROP_KEY_SCALING, {res_source_info::INPUT_EDGE, chan}));
_samp_rate_in.push_back(
property_t<double>(PROP_KEY_SAMP_RATE, {res_source_info::INPUT_EDGE, chan}));
_tick_rate_in.push_back(property_t<double>(
PROP_KEY_TICK_RATE, {res_source_info::INPUT_EDGE, chan}));
_type_in.emplace_back(property_t<std::string>(
PROP_KEY_TYPE, otw_format, {res_source_info::INPUT_EDGE, chan}));
// Give us some shorthands for the rest of this function
property_t<double>* scaling_in = &_scaling_in.back();
property_t<double>* samp_rate_in = &_samp_rate_in.back();
property_t<double>* tick_rate_in = &_tick_rate_in.back();
property_t<std::string>* type_in = &_type_in.back();
// Register them
register_property(scaling_in);
register_property(samp_rate_in);
register_property(tick_rate_in);
register_property(type_in);
// Add resolvers
add_property_resolver({scaling_in}, {},
[&scaling_in = *scaling_in, chan, this]() {
RFNOC_LOG_TRACE("Calling resolver for `scaling_in'@" << chan);
if (scaling_in.is_valid()) {
this->set_scale_factor(chan, scaling_in.get() / 32767.0);
}
});
add_property_resolver({samp_rate_in}, {},
[&samp_rate_in = *samp_rate_in, chan, this]() {
RFNOC_LOG_TRACE("Calling resolver for `samp_rate_in'@" << chan);
if (samp_rate_in.is_valid()) {
this->set_samp_rate(samp_rate_in.get());
}
});
add_property_resolver({tick_rate_in}, {},
[&tick_rate_in = *tick_rate_in, chan, this]() {
RFNOC_LOG_TRACE("Calling resolver for `tick_rate_in'@" << chan);
if (tick_rate_in.is_valid()) {
this->set_tick_rate(tick_rate_in.get());
}
});
}
void rfnoc_rx_streamer::_handle_rx_event_action(
const res_source_info& src, rx_event_action_info::sptr rx_event_action)
{
UHD_ASSERT_THROW(src.type == res_source_info::INPUT_EDGE);
if (rx_event_action->error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW) {
RFNOC_LOG_DEBUG("Received overrun message on port " << src.instance);
if (_overrun_handling_mode.exchange(true)) {
RFNOC_LOG_TRACE("Ignoring duplicate overrun message.");
return;
}
_overrun_channel = src.instance;
RFNOC_LOG_TRACE(
"Switching to overrun-handling mode: Stopping all upstream producers...");
auto stop_action =
stream_cmd_action_info::make(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
// Reminder: Delivery of all of these actions is deferred until this
// action handler is complete.
for (size_t i = 0; i < get_num_input_ports(); ++i) {
post_action({res_source_info::INPUT_EDGE, i}, stop_action);
}
if (!rx_event_action->args.cast<bool>("cont_mode", false)) {
// If we don't need to restart, that's all we need to do. Clear this
// flag before setting the stopped due to overrun status below to
// avoid a potential race condition with the overrun handler.
_overrun_handling_mode = false;
}
// Tell the streamer to flag an overrun to the user after the data that
// was buffered prior to the overrun is read.
set_stopped_due_to_overrun();
}
}
void rfnoc_rx_streamer::_handle_stream_cmd_action(
const res_source_info& src, stream_cmd_action_info::sptr stream_cmd_action)
{
RFNOC_LOG_TRACE("Received stream command on " << src.to_string());
UHD_ASSERT_THROW(src.type == res_source_info::INPUT_EDGE);
auto start_action =
stream_cmd_action_info::make(stream_cmd_action->stream_cmd.stream_mode);
start_action->stream_cmd = stream_cmd_action->stream_cmd;
for (size_t i = 0; i < get_num_input_ports(); ++i) {
post_action({res_source_info::INPUT_EDGE, i}, start_action);
}
if (_overrun_handling_mode.exchange(false)) {
RFNOC_LOG_TRACE("Leaving overrun handling mode.");
}
}
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