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/*
* Copyright © 2010 Keith Packard <keithp@keithp.com>
*
* 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 altosui;
import java.io.*;
import java.util.*;
import java.text.*;
import altosui.AltosTelemetry;
public class AltosTelemetryReader extends AltosReader {
LinkedList<AltosRecord> records;
Iterator<AltosRecord> record_iterator;
int boost_tick;
public AltosRecord read() throws IOException, ParseException {
AltosRecord r;
if (!record_iterator.hasNext())
return null;
r = record_iterator.next();
r.time = (r.tick - boost_tick) / 100.0;
return r;
}
public AltosTelemetryReader (FileInputStream input) {
boolean saw_boost = false;
int current_tick = 0;
records = new LinkedList<AltosRecord> ();
try {
for (;;) {
String line = AltosRecord.gets(input);
if (line == null) {
break;
}
try {
AltosTelemetry record = new AltosTelemetry(line);
if (record == null)
break;
if (records.isEmpty()) {
current_tick = record.tick;
} else {
int tick = record.tick | (current_tick & ~ 0xffff);
if (tick < current_tick - 0x1000)
tick += 0x10000;
current_tick = tick;
record.tick = current_tick;
}
if (!saw_boost && record.state >= Altos.ao_flight_boost)
{
saw_boost = true;
boost_tick = record.tick;
}
records.add(record);
} catch (ParseException pe) {
System.out.printf("parse exception %s\n", pe.getMessage());
} catch (AltosCRCException ce) {
System.out.printf("crc error\n");
}
}
} catch (IOException io) {
System.out.printf("io exception\n");
}
record_iterator = records.iterator();
try {
input.close();
} catch (IOException ie) {
}
}
}
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