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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 org.altusmetrum.altoslib_1;
import java.io.*;
import java.util.*;
import java.text.*;
public class AltosTelemetryIterable extends AltosRecordIterable {
TreeSet<AltosRecord> records;
public Iterator<AltosRecord> iterator () {
return records.iterator();
}
boolean has_gps = false;
boolean has_accel = false;
boolean has_ignite = false;
public boolean has_gps() { return has_gps; }
public boolean has_accel() { return has_accel; }
public boolean has_ignite() { return has_ignite; };
public AltosTelemetryIterable (FileInputStream input) {
boolean saw_boost = false;
int current_tick = 0;
int boost_tick = 0;
AltosRecord previous = null;
records = new TreeSet<AltosRecord> ();
try {
for (;;) {
String line = AltosLib.gets(input);
if (line == null) {
break;
}
try {
AltosRecord record = AltosTelemetry.parse(line, previous);
if (record == null)
break;
if (records.isEmpty()) {
current_tick = record.tick;
} else {
int tick = record.tick;
while (tick < current_tick - 0x1000)
tick += 0x10000;
current_tick = tick;
record.tick = current_tick;
}
if (!saw_boost && record.state >= AltosLib.ao_flight_boost)
{
saw_boost = true;
boost_tick = record.tick;
}
if (record.acceleration() != AltosRecord.MISSING)
has_accel = true;
if (record.gps != null)
has_gps = true;
if (record.main_voltage() != AltosRecord.MISSING)
has_ignite = true;
if (previous != null && previous.tick != record.tick)
records.add(previous);
previous = record;
} catch (ParseException pe) {
System.out.printf("parse exception %s\n", pe.getMessage());
} catch (AltosCRCException ce) {
}
}
} catch (IOException io) {
System.out.printf("io exception\n");
}
if (previous != null)
records.add(previous);
/* Adjust all tick counts to match expected eeprom values,
* which starts with a 16-bit tick count 16 samples before boost
*/
int tick_adjust = (boost_tick - 16) & 0xffff0000;
for (AltosRecord r : this)
r.tick -= tick_adjust;
boost_tick -= tick_adjust;
/* adjust all tick counts to be relative to boost time */
for (AltosRecord r : this)
r.time = (r.tick - boost_tick) / 100.0;
try {
input.close();
} catch (IOException ie) {
}
}
}
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