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/*
* Copyright © 2011 Keith Packard <keithp@keithp.com>
* Copyright © 2012 Mike Beattie <mike@ethernal.org>
*
* 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; version 2 of the License.
*
* 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.altusmetrum.AltosDroid;
import java.text.*;
import java.io.*;
import java.util.concurrent.*;
import android.util.Log;
import android.os.Handler;
import org.altusmetrum.altoslib_5.*;
public class TelemetryReader extends Thread {
private static final String TAG = "TelemetryReader";
private static final boolean D = true;
int crc_errors;
Handler handler;
AltosLink link;
AltosState state = null;
AltosFlightReader stacked;
LinkedBlockingQueue<AltosLine> telemQueue;
public AltosState read() throws ParseException, AltosCRCException, InterruptedException, IOException {
AltosLine l = telemQueue.take();
if (l.line == null)
throw new IOException("IO error");
AltosTelemetry telem = AltosTelemetryLegacy.parse(l.line);
if (state == null)
state = new AltosState();
else
state = state.clone();
telem.update_state(state);
return state;
}
public void close() {
state = null;
if (stacked != null) {
stacked.close(false);
stacked = null;
}
link.remove_monitor(telemQueue);
link = null;
telemQueue.clear();
telemQueue = null;
}
public void run() {
AltosState state = null;
try {
if (D) Log.d(TAG, "starting reader");
while (stacked != null) {
AltosState stacked_state = null;
try {
stacked_state = stacked.read();
} catch (ParseException pe) {
continue;
} catch (AltosCRCException ce) {
continue;
}
if (stacked_state != null)
state = stacked_state;
else
stacked = null;
}
if (state != null) {
if (D) Log.d(TAG, "Send initial state");
handler.obtainMessage(TelemetryService.MSG_TELEMETRY, state).sendToTarget();
}
if (D) Log.d(TAG, "starting loop");
while (telemQueue != null) {
try {
state = read();
handler.obtainMessage(TelemetryService.MSG_TELEMETRY, state).sendToTarget();
} catch (ParseException pp) {
Log.e(TAG, String.format("Parse error: %d \"%s\"", pp.getErrorOffset(), pp.getMessage()));
} catch (AltosCRCException ce) {
++crc_errors;
handler.obtainMessage(TelemetryService.MSG_CRC_ERROR, new Integer(crc_errors)).sendToTarget();
}
}
} catch (InterruptedException ee) {
} catch (IOException ie) {
} finally {
close();
}
}
public TelemetryReader (AltosLink in_link, Handler in_handler, AltosFlightReader in_stacked) {
if (D) Log.d(TAG, "connected TelemetryReader create started");
link = in_link;
handler = in_handler;
stacked = in_stacked;
state = null;
telemQueue = new LinkedBlockingQueue<AltosLine>();
link.add_monitor(telemQueue);
link.set_telemetry(AltosLib.ao_telemetry_standard);
if (D) Log.d(TAG, "connected TelemetryReader created");
}
private static AltosFlightReader existing_data(AltosLink link) {
if (link == null)
return null;
File file = AltosPreferences.logfile(link.serial);
if (file != null) {
AltosStateIterable iterable = AltosStateIterable.iterable(file);
if (iterable != null)
return new AltosReplayReader(iterable.iterator(), file, false);
}
return null;
}
public TelemetryReader(AltosLink link, Handler handler) {
this(link, handler, existing_data(link));
}
}
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