git.gag.com Git - fw/altos/blob - altosui/AltosTelemetryIterable.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package altosui;
  19
  20 import java.io.*;
  21 import java.util.*;
  22 import java.text.*;
  23
  24 public class AltosTelemetryIterable extends AltosRecordIterable {
  25         LinkedList<AltosRecord> records;
  26
  27         public Iterator<AltosRecord> iterator () {
  28                 return records.iterator();
  29         }
  30
  31         public AltosTelemetryIterable (FileInputStream input) {
  32                 boolean saw_boost = false;
  33                 int     current_tick = 0;
  34                 int     boost_tick = 0;
  35
  36                 records = new LinkedList<AltosRecord> ();
  37
  38                 try {
  39                         for (;;) {
  40                                 String line = AltosRecord.gets(input);
  41                                 if (line == null) {
  42                                         break;
  43                                 }
  44                                 try {
  45                                         AltosTelemetry record = new AltosTelemetry(line);
  46                                         if (record == null)
  47                                                 break;
  48                                         if (records.isEmpty()) {
  49                                                 current_tick = record.tick;
  50                                         } else {
  51                                                 int tick = record.tick | (current_tick & ~ 0xffff);
  52                                                 if (tick < current_tick - 0x1000)
  53                                                         tick += 0x10000;
  54                                                 current_tick = tick;
  55                                                 record.tick = current_tick;
  56                                         }
  57                                         if (!saw_boost && record.state >= Altos.ao_flight_boost)
  58                                         {
  59                                                 saw_boost = true;
  60                                                 boost_tick = record.tick;
  61                                         }
  62                                         records.add(record);
  63                                 } catch (ParseException pe) {
  64                                         System.out.printf("parse exception %s\n", pe.getMessage());
  65                                 } catch (AltosCRCException ce) {
  66                                         System.out.printf("crc error\n");
  67                                 }
  68                         }
  69                 } catch (IOException io) {
  70                         System.out.printf("io exception\n");
  71                 }
  72
  73                 /* adjust all tick counts to be relative to boost time */
  74                 for (AltosRecord r : this)
  75                         r.time = (r.tick - boost_tick) / 100.0;
  76
  77                 try {
  78                         input.close();
  79                 } catch (IOException ie) {
  80                 }
  81         }
  82 }