NXDNClients/NXDNParrot/NXDNParrot.cpp

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/*
* Copyright (C) 2016,2018 by Jonathan Naylor G4KLX
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "StopWatch.h"
#include "NXDNParrot.h"
#include "Parrot.h"
#include "Network.h"
#include "Version.h"
#include "Thread.h"
#include "Timer.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
int main(int argc, char** argv)
{
if (argc == 1) {
::fprintf(stderr, "Usage: NXDNParrot <port>\n");
return 1;
}
unsigned int port = ::atoi(argv[1U]);
if (port == 0U) {
::fprintf(stderr, "NXDNParrot: invalid port number - %s\n", argv[1U]);
return 1;
}
CNXDNParrot parrot(port);
parrot.run();
return 0;
}
CNXDNParrot::CNXDNParrot(unsigned int port) :
m_port(port)
{
}
CNXDNParrot::~CNXDNParrot()
{
}
void CNXDNParrot::run()
{
CParrot parrot(180U);
CNetwork network(m_port);
bool ret = network.open();
if (!ret)
return;
CStopWatch stopWatch;
stopWatch.start();
CTimer watchdogTimer(1000U, 0U, 1500U);
CTimer turnaroundTimer(1000U, 2U);
CStopWatch playoutTimer;
unsigned int count = 0U;
bool playing = false;
::fprintf(stdout, "Starting NXDNParrot-%s\n", VERSION);
for (;;) {
unsigned char buffer[200U];
unsigned int len = network.read(buffer);
if (len > 0U) {
parrot.write(buffer, len);
watchdogTimer.start();
if ((buffer[9U] & 0x08U) == 0x08U) {
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::fprintf(stdout, "Received end of transmission\n");
turnaroundTimer.start();
watchdogTimer.stop();
parrot.end();
}
}
if (turnaroundTimer.isRunning() && turnaroundTimer.hasExpired()) {
if (!playing) {
playoutTimer.start();
playing = true;
count = 0U;
}
// A frame every 80ms
unsigned int wanted = playoutTimer.elapsed() / 80U;
while (count < wanted) {
len = parrot.read(buffer);
if (len > 0U) {
network.write(buffer, len);
count++;
} else {
parrot.clear();
network.end();
turnaroundTimer.stop();
playing = false;
count = wanted;
}
}
}
unsigned int ms = stopWatch.elapsed();
stopWatch.start();
network.clock(ms);
watchdogTimer.clock(ms);
turnaroundTimer.clock(ms);
if (watchdogTimer.isRunning() && watchdogTimer.hasExpired()) {
turnaroundTimer.start();
watchdogTimer.stop();
parrot.end();
}
if (ms < 5U)
CThread::sleep(5U);
}
network.close();
}