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#include <stdint.h>
#include <iostream>
#include <fstream>
#include "../../include/lsl_cpp.h"
#include <string>
#include <numeric>
#include <cmath>
#include <iomanip>
/* Test the latency between sending a sample and receiving it*/
int main(int argc, char *argv[]) {
/* if (argc != 2)
std::cout << "Usage: bounce [sender|receiver]" << std::endl;
return 1;
}
std::string role(argv[1]);
bool sender;
if(role=="sender") sender=true;
else if(role=="receiver") sender=false;
else {
std::cout << "Usage: bounce [sender|receiver]" << std::endl;
return 1;
}*/
//constexpr is not available in Visual Studio 2013
/*constexpr*/ int numBounces = 10000;
double timestamps[10000/*numBounces*/][2];
auto streaminfo = lsl::stream_info("Sender", "Bounce", 1, lsl::IRREGULAR_RATE, lsl::cf_int32);
lsl::stream_outlet outlet(streaminfo);
auto found_stream_info = lsl::resolve_stream("name", "Sender");
if(found_stream_info.empty())
throw std::runtime_error("Sender outlet not found!");
lsl::stream_info si = found_stream_info[0];
std::cout << "Found " << si.name() << '@' << si.hostname() << std::endl;
lsl::stream_inlet inlet(found_stream_info[0]);
// push a single sample first
int dummy=0;
outlet.push_sample(&dummy, 0, true);
inlet.pull_sample(&dummy, 1, 2);
std::cout << "Starting bounce loop" << std::endl;
for(int32_t counter=0; counter < numBounces; counter++) {
int32_t received_counter;
timestamps[counter][0] = lsl::local_clock();
outlet.push_sample(&counter, timestamps[counter][0], true);
inlet.pull_sample(&received_counter, 1, 2);
timestamps[counter][1] = lsl::local_clock();
if(received_counter != counter) throw std::runtime_error("Got the wrong sample!");
}
double latencies[10000/*numBounces*/];
double meanLatency = 0;
for(int i=1; i < numBounces; i++) {
latencies[i] = (timestamps[i][1] - timestamps[i][0]);
meanLatency += latencies[i] / numBounces;
}
double sdLatency = 0;
for(double x_i: latencies) sdLatency+=((x_i-meanLatency)*(x_i-meanLatency))/numBounces;
sdLatency = std::sqrt(sdLatency);
/*std::cout << "LSL " << lsl::library_version() << ", Debug: " << LSLDEBUG
<< ", System Boost: " << LSL_USE_SYSTEM_BOOST << std::endl;*/
std::cout << "Bounced " << numBounces << " samples, latency M="
<< (meanLatency*1000) << "ms, SD=" << (sdLatency*1000) << "ms" << std::endl;
std::ofstream tscsv("bounce.csv");
if(tscsv.is_open()) {
tscsv << "t1\tt2\n" << std::setprecision(15) << std::fixed;
for(int i=0;i<numBounces;i++)
tscsv << timestamps[i][0] << '\t' << timestamps[i][1] << '\n';
std::cout << "Wrote timestamps to bounce.csv" << std::endl;
}
return 0;
}
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