Add the optional System Fusion Parrot.

YSFParrot.cpp

@@ -0,0 +1,92 @@
+/*
+*   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;
+
+	if (data[0U] == TAG_EOT) {
+		m_timer.start();
+		m_ptr = 0U;
+	}
+
+	return true;
+}
+
+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);
+}