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/*
* Copyright (C) 2003 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 "JT6MTransmit.h"
#include "common/NCO.h"
#include "common/SoundFile.h"
#include "common/Exception.h"
#include "jt6m/JT6MDefs.h"
#include "jt6m/JT6MLookups.h"
#include <wx/datetime.h>
#include <wx/debug.h>
#include <wx/log.h>
int main(int argc, char **argv)
{
if (argc < 3) {
::fprintf(stderr, "Usage: JT6MTransmit <filename> <message>\n");
return 0;
}
wxString fileName = wxString(argv[1]);
wxString message = wxString(argv[2]);
try {
CSoundDev* soundDev = new CSoundFile(fileName, JT6M_SAMPLE_RATE, 8);
CJT6MTransmit transmit(soundDev, message);
transmit.run();
}
catch (CException& ex) {
::fprintf(stderr, "Error: %s\n", ex.getMessage().c_str());
return 1;
}
catch (...) {
::fprintf(stderr, "An Exception has occurred\n");
return 1;
}
return 0;
}
CJT6MTransmit::CJT6MTransmit(CSoundDev* soundDev, const wxString& message) :
m_soundDev(soundDev),
m_message(message)
{
wxASSERT(m_soundDev != NULL);
}
CJT6MTransmit::~CJT6MTransmit()
{
}
void CJT6MTransmit::run()
{
wxASSERT(m_soundDev != NULL);
m_soundDev->openWrite();
CJT6MLookups lookups;
CNCO nco(JT6M_SAMPLE_RATE);
if ((m_message.Length() % 2) == 1)
m_message.Append(wxT(' '));
unsigned int charPos = 0;
unsigned int syncPos = 0;
for (int samples = 0; samples < (29 * JT6M_SAMPLE_RATE); samples += JT6M_SYMBOL_LENGTH) {
int tone = lookups.lookupChar(m_message.GetChar(charPos));
charPos = (charPos + 1) % m_message.Length();
syncPos = (syncPos + 1) % 2;
if (tone == -1)
tone = lookups.lookupChar(wxT(' '));
double freq, out[JT6M_SYMBOL_LENGTH];
freq = double(tone + 50) * double(JT6M_SAMPLE_RATE) / double(JT6M_SYMBOL_LENGTH);
nco.generate(freq, out, JT6M_SYMBOL_LENGTH);
m_soundDev->write(out, JT6M_SYMBOL_LENGTH, JT6M_SEND_VOLUME);
if (syncPos == 1) {
freq = double(50 * JT6M_SAMPLE_RATE) / double(JT6M_SYMBOL_LENGTH);
nco.generate(freq, out, JT6M_SYMBOL_LENGTH);
m_soundDev->write(out, JT6M_SYMBOL_LENGTH, JT6M_SEND_VOLUME);
samples += JT6M_SYMBOL_LENGTH;
}
}
m_soundDev->close();
}
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