Initial commit.

Common/EchoUnit.cpp

@@ -0,0 +1,154 @@
+/*
+ *   Copyright (C) 2011-2014 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 "DStarDefines.h"
+#include "EchoUnit.h"
+#include "Defs.h"
+
+const unsigned int MAX_FRAMES = 60U * DSTAR_FRAMES_PER_SEC;
+
+CEchoUnit::CEchoUnit(IRepeaterCallback* handler, const wxString& callsign) :
+m_handler(handler),
+m_callsign(callsign),
+m_status(ES_IDLE),
+m_timer(1000U, REPLY_TIME),
+m_header(NULL),
+m_data(NULL),
+m_in(0U),
+m_out(0U),
+m_time()
+{
+	wxASSERT(handler != NULL);
+
+	m_data = new CAMBEData*[MAX_FRAMES];
+
+	for (unsigned int i = 0U; i < MAX_FRAMES; i++)
+		m_data[i] = NULL;
+}
+
+CEchoUnit::~CEchoUnit()
+{
+	delete[] m_data;
+}
+
+void CEchoUnit::writeHeader(const CHeaderData& header)
+{
+	if (m_status != ES_IDLE)
+		return;
+
+	m_header = new CHeaderData(header);
+
+	m_in     = 0U;		
+	m_status = ES_RECEIVE;
+}
+
+void CEchoUnit::writeData(const CAMBEData& data)
+{
+	if (m_status != ES_RECEIVE)
+		return;
+
+	if (m_in < MAX_FRAMES) {
+		m_data[m_in] = new CAMBEData(data);
+		m_in++;
+	}
+
+	if (data.isEnd()) {
+		wxLogMessage(wxT("Received %.1f secs of audio from %s for echoing"), float(m_in) / float(DSTAR_FRAMES_PER_SEC), m_header->getMyCall1().c_str());
+
+		m_timer.start();
+		m_status = ES_WAIT;
+	}
+}
+
+void CEchoUnit::end()
+{
+	if (m_status != ES_RECEIVE)
+		return;
+
+	wxLogMessage(wxT("Received %.1f secs of audio from %s for echoing"), float(m_in) / float(DSTAR_FRAMES_PER_SEC), m_header->getMyCall1().c_str());
+
+	m_timer.start();
+	m_status = ES_WAIT;
+}
+
+void CEchoUnit::clock(unsigned int ms)
+{
+	m_timer.clock(ms);
+
+	if (m_status == ES_WAIT && m_timer.hasExpired()) {
+		m_timer.stop();
+
+		// RPT1 and RPT2 will be filled in later
+		m_header->setMyCall1(m_callsign);
+		m_header->setMyCall2(wxT("ECHO"));
+		m_header->setYourCall(wxT("CQCQCQ  "));
+
+		m_handler->process(*m_header, DIR_INCOMING, AS_ECHO);
+
+		delete m_header;
+
+		m_out    = 0U;
+		m_status = ES_TRANSMIT;
+
+		m_time.Start();
+
+		return;
+	}
+
+	if (m_status == ES_TRANSMIT) {
+		unsigned int needed = m_time.Time() / DSTAR_FRAME_TIME_MS;
+
+		while (m_out < needed) {
+			CAMBEData* data = m_data[m_out];
+			m_data[m_out] = NULL;
+			m_out++;
+
+			if (m_in == m_out)
+				data->setEnd(true);
+
+			m_handler->process(*data, DIR_INCOMING, AS_ECHO);
+
+			delete data;
+
+			if (m_in == m_out) {
+				m_in     = 0U;
+				m_out    = 0U;
+				m_status = ES_IDLE;
+				return;
+			}
+		}
+
+		return;
+	}
+}
+
+void CEchoUnit::cancel()
+{
+	for (unsigned int i = 0U; i < MAX_FRAMES; i++) {
+		if (m_data[i] != NULL) {
+			delete m_data[i];
+			m_data[i] = NULL;
+		}
+	}
+
+	m_status = ES_IDLE;
+	m_out    = 0U;
+	m_in     = 0U;
+
+	m_timer.stop();
+}