git.gag.com Git - fw/altos/blob - ao-tools/altosui/AltosTelemetryReader.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 import altosui.AltosTelemetry;
  24
  25 public class AltosTelemetryReader extends AltosReader {
  26         LinkedList<AltosRecord> records;
  27
  28         Iterator<AltosRecord> record_iterator;
  29
  30         int     boost_tick;
  31
  32         public AltosRecord read() throws IOException, ParseException {
  33                 AltosRecord     r;
  34                 if (!record_iterator.hasNext())
  35                         return null;
  36
  37                 r = record_iterator.next();
  38                 r.time = (r.tick - boost_tick) / 100.0;
  39                 return r;
  40         }
  41
  42         public AltosTelemetryReader (FileInputStream input) {
  43                 boolean saw_boost = false;
  44                 int     current_tick = 0;
  45
  46                 records = new LinkedList<AltosRecord> ();
  47
  48                 try {
  49                         for (;;) {
  50                                 String line = AltosRecord.gets(input);
  51                                 if (line == null) {
  52                                         break;
  53                                 }
  54                                 try {
  55                                         System.out.printf("%s\n", line);
  56                                         AltosTelemetry record = new AltosTelemetry(line);
  57                                         if (record == null)
  58                                                 break;
  59                                         if (records.isEmpty()) {
  60                                                 current_tick = record.tick;
  61                                         } else {
  62                                                 int tick = record.tick | (current_tick & ~ 0xffff);
  63                                                 if (tick < current_tick - 0x1000)
  64                                                         tick += 0x10000;
  65                                                 current_tick = tick;
  66                                                 record.tick = current_tick;
  67                                         }
  68                                         System.out.printf("\tRSSI %d tick %d\n", record.rssi, record.tick);
  69                                         if (!saw_boost && record.state >= Altos.ao_flight_boost)
  70                                         {
  71                                                 saw_boost = true;
  72                                                 boost_tick = record.tick;
  73                                         }
  74                                         records.add(record);
  75                                 } catch (ParseException pe) {
  76                                         System.out.printf("parse exception %s\n", pe.getMessage());
  77                                 } catch (AltosCRCException ce) {
  78                                         System.out.printf("crc error\n");
  79                                 }
  80                         }
  81                 } catch (IOException io) {
  82                         System.out.printf("io exception\n");
  83                 }
  84                 record_iterator = records.iterator();
  85                 try {
  86                         input.close();
  87                 } catch (IOException ie) {
  88                 }
  89         }
  90 }