MMDVMHost-Private/YSFParrot.cpp
2016-02-23 21:01:14 +00:00

95 lines
1.9 KiB
C++

/*
* Copyright (C) 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 "YSFParrot.h"
#include "YSFDefines.h"
#include "Defines.h"
#include <cstdio>
#include <cassert>
#include <cstring>
CYSFParrot::CYSFParrot(unsigned int timeout) :
m_data(NULL),
m_length(timeout * 1220U + 1000U),
m_used(0U),
m_ptr(0U),
m_timer(1000U, 2U)
{
assert(timeout > 0U);
m_data = new unsigned char[m_length];
}
CYSFParrot::~CYSFParrot()
{
delete[] m_data;
}
bool CYSFParrot::write(const unsigned char* data)
{
assert(data != NULL);
if ((m_length - m_used) < 1000U)
return false;
::memcpy(m_data + m_used, data, YSF_FRAME_LENGTH_BYTES + 2U);
m_used += YSF_FRAME_LENGTH_BYTES + 2U;
return true;
}
void CYSFParrot::end()
{
if (m_used > 0U)
m_timer.start();
m_ptr = 0U;
}
void CYSFParrot::read(unsigned char* data)
{
assert(data != NULL);
if (m_used == 0U)
return;
::memcpy(data, m_data + m_ptr, YSF_FRAME_LENGTH_BYTES + 2U);
m_ptr += YSF_FRAME_LENGTH_BYTES + 2U;
if (m_ptr >= m_used) {
m_timer.stop();
m_used = 0U;
}
}
bool CYSFParrot::hasData()
{
if (m_timer.isRunning() && m_timer.hasExpired())
return true;
if (m_used == 0U)
return false;
return false;
}
void CYSFParrot::clock(unsigned int ms)
{
m_timer.clock(ms);
}