mirror of
https://github.com/ShaYmez/MMDVM_CM.git
synced 2024-11-10 10:23:28 -05:00
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/*
|
|
* Copyright (C) 2012 by Ian Wraith
|
|
* Copyright (C) 2015,2016 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 "DMRFullLC.h"
|
|
|
|
#include "DMRDefines.h"
|
|
#include "RS129.h"
|
|
#include "Utils.h"
|
|
#include "Log.h"
|
|
|
|
#include <cstdio>
|
|
#include <cassert>
|
|
|
|
CDMRFullLC::CDMRFullLC() :
|
|
m_bptc()
|
|
{
|
|
}
|
|
|
|
CDMRFullLC::~CDMRFullLC()
|
|
{
|
|
}
|
|
|
|
CDMRLC* CDMRFullLC::decode(const unsigned char* data, unsigned char type)
|
|
{
|
|
assert(data != NULL);
|
|
|
|
unsigned char lcData[12U];
|
|
m_bptc.decode(data, lcData);
|
|
|
|
switch (type) {
|
|
case DT_VOICE_LC_HEADER:
|
|
lcData[9U] ^= VOICE_LC_HEADER_CRC_MASK[0U];
|
|
lcData[10U] ^= VOICE_LC_HEADER_CRC_MASK[1U];
|
|
lcData[11U] ^= VOICE_LC_HEADER_CRC_MASK[2U];
|
|
break;
|
|
|
|
case DT_TERMINATOR_WITH_LC:
|
|
lcData[9U] ^= TERMINATOR_WITH_LC_CRC_MASK[0U];
|
|
lcData[10U] ^= TERMINATOR_WITH_LC_CRC_MASK[1U];
|
|
lcData[11U] ^= TERMINATOR_WITH_LC_CRC_MASK[2U];
|
|
break;
|
|
|
|
default:
|
|
::LogError("Unsupported LC type - %d", int(type));
|
|
return NULL;
|
|
}
|
|
|
|
if (!CRS129::check(lcData))
|
|
return NULL;
|
|
|
|
return new CDMRLC(lcData);
|
|
}
|
|
|
|
void CDMRFullLC::encode(const CDMRLC& lc, unsigned char* data, unsigned char type)
|
|
{
|
|
assert(data != NULL);
|
|
|
|
unsigned char lcData[12U];
|
|
lc.getData(lcData);
|
|
|
|
unsigned char parity[4U];
|
|
CRS129::encode(lcData, 9U, parity);
|
|
|
|
switch (type) {
|
|
case DT_VOICE_LC_HEADER:
|
|
lcData[9U] = parity[2U] ^ VOICE_LC_HEADER_CRC_MASK[0U];
|
|
lcData[10U] = parity[1U] ^ VOICE_LC_HEADER_CRC_MASK[1U];
|
|
lcData[11U] = parity[0U] ^ VOICE_LC_HEADER_CRC_MASK[2U];
|
|
break;
|
|
|
|
case DT_TERMINATOR_WITH_LC:
|
|
lcData[9U] = parity[2U] ^ TERMINATOR_WITH_LC_CRC_MASK[0U];
|
|
lcData[10U] = parity[1U] ^ TERMINATOR_WITH_LC_CRC_MASK[1U];
|
|
lcData[11U] = parity[0U] ^ TERMINATOR_WITH_LC_CRC_MASK[2U];
|
|
break;
|
|
|
|
default:
|
|
::LogError("Unsupported LC type - %d", int(type));
|
|
return;
|
|
}
|
|
|
|
m_bptc.encode(lcData, data);
|
|
}
|