示例#1
0
  /**
   * Creates the tool context denoting the range of samples that should be analysed by a tool.
   *
   * @return a tool context, never <code>null</code>.
   */
  private ToolContext createToolContext() {
    int startOfDecode = -1;
    int endOfDecode = -1;

    final int dataLength = this.dataContainer.getValues().length;
    if (this.dataContainer.isCursorsEnabled()) {
      if (this.dataContainer.isCursorPositionSet(0)) {
        final Long cursor1 = this.dataContainer.getCursorPosition(0);
        startOfDecode = this.dataContainer.getSampleIndex(cursor1.longValue()) - 1;
      }
      if (this.dataContainer.isCursorPositionSet(1)) {
        final Long cursor2 = this.dataContainer.getCursorPosition(1);
        endOfDecode = this.dataContainer.getSampleIndex(cursor2.longValue()) + 1;
      }
    } else {
      startOfDecode = 0;
      endOfDecode = dataLength;
    }

    startOfDecode = Math.max(0, startOfDecode);
    if ((endOfDecode < 0) || (endOfDecode >= dataLength)) {
      endOfDecode = dataLength - 1;
    }

    return new DefaultToolContext(startOfDecode, endOfDecode);
  }
示例#2
0
 /**
  * Sets the (average) bit length for this data set.
  *
  * <p>A bit length is used to determine the baudrate of this data set. If there is already a bit
  * length available from an earlier call to this method, it will be used to average the resulting
  * bit length if both the current and the given bit length are "close". This allows you to use the
  * bit lengths of both the RxD- and TxD-lines to get a good approximation of the actual baudrate.
  *
  * @param aBitLength the bit length to set/add, should be >= 0.
  */
 public void setSampledBitLength(final int aBitLength) {
   // If the given bit length is "much" smaller (smaller bit length means
   // higher baudrate) than the current one, switch to that one instead; this
   // way we can recover from bad values...
   if ((this.bitLength <= 0) || ((10.0 * aBitLength) < this.bitLength)) {
     // First time being called, take the given bit length as our "truth"...
     this.bitLength = aBitLength;
   } else {
     // Take the average as the current and the given bit lengths are "close"
     // to each other; ignore the given bit length otherwise, as it clobbers
     // our earlier results...
     final int diff = Math.abs(aBitLength - this.bitLength);
     if ((diff >= 0) && (diff < 50)) {
       this.bitLength = (int) ((aBitLength + this.bitLength) / 2.0);
     } else {
       LOG.log(
           Level.INFO,
           "Ignoring sampled bit length ({0}) as it deviates "
               + "too much from current bit length ({1}).",
           new Object[] {Integer.valueOf(aBitLength), Integer.valueOf(this.bitLength)});
     }
   }
 }
示例#3
0
 /** @see nl.lxtreme.ols.api.tools.ToolContext#getLength() */
 @Override
 public int getLength() {
   return Math.max(0, this.endSampleIdx - this.startSampleIdx);
 }
示例#4
0
  /**
   * Reads the data from a given reader.
   *
   * @param aProject the project to read the settings to;
   * @param aReader the reader to read the data from, cannot be <code>null</code>.
   * @throws IOException in case of I/O problems.
   */
  @SuppressWarnings("boxing")
  public static void read(final StubDataSet aDataSet, final Reader aReader) throws IOException {
    int size = -1;
    Integer rate = null, channels = null, enabledChannels = null;
    long triggerPos = -1L;
    long absLen = -1L;

    // assume 'new' file format is in use, don't support uncompressed ones...
    boolean compressed = true;

    final BufferedReader br = new BufferedReader(aReader);

    final List<String[]> dataValues = new ArrayList<String[]>();

    String line;
    while ((line = br.readLine()) != null) {
      // Determine whether the line is an instruction, or data...
      final Matcher instructionMatcher = OLS_INSTRUCTION_PATTERN.matcher(line);
      final Matcher dataMatcher = OLS_DATA_PATTERN.matcher(line);

      if (dataMatcher.matches()) {
        final String[] dataPair = new String[] {dataMatcher.group(1), dataMatcher.group(2)};
        dataValues.add(dataPair);
      } else if (instructionMatcher.matches()) {
        // Ok; found an instruction...
        final String instrKey = instructionMatcher.group(1);
        final String instrValue = instructionMatcher.group(2);

        if ("Size".equals(instrKey)) {
          size = safeParseInt(instrValue);
        } else if ("Rate".equals(instrKey)) {
          rate = safeParseInt(instrValue);
        } else if ("Channels".equals(instrKey)) {
          channels = safeParseInt(instrValue);
        } else if ("TriggerPosition".equals(instrKey)) {
          triggerPos = Long.parseLong(instrValue);
        } else if ("EnabledChannels".equals(instrKey)) {
          enabledChannels = safeParseInt(instrValue);
        } else if ("CursorEnabled".equals(instrKey)) {
          aDataSet.setCursorsEnabled(Boolean.parseBoolean(instrValue));
        } else if ("Compressed".equals(instrKey)) {
          compressed = Boolean.parseBoolean(instrValue);
        } else if ("AbsoluteLength".equals(instrKey)) {
          absLen = Long.parseLong(instrValue);
        } else if ("CursorA".equals(instrKey)) {
          final long value = safeParseLong(instrValue);
          if (value > Long.MIN_VALUE) {
            aDataSet.getCursor(0).setTimestamp(value);
          }
        } else if ("CursorB".equals(instrKey)) {
          final long value = safeParseLong(instrValue);
          if (value > Long.MIN_VALUE) {
            aDataSet.getCursor(1).setTimestamp(value);
          }
        } else if (instrKey.startsWith("Cursor")) {
          final int idx = safeParseInt(instrKey.substring(6));
          final long pos = Long.parseLong(instrValue);
          if (pos > Long.MIN_VALUE) {
            aDataSet.getCursor(idx).setTimestamp(pos);
          }
        }
      }
    }

    // Perform some sanity checks, make it not possible to import invalid
    // data...
    if (dataValues.isEmpty()) {
      throw new IOException("Data file does not contain any sample data!");
    }
    if (!compressed) {
      throw new IOException(
          "Uncompressed data file found! Please send this file to the OLS developers!");
    }
    // In case the size is not provided (as of 0.9.4 no longer mandatory),
    // take the length of the data values as size indicator...
    if (size < 0) {
      size = dataValues.size();
    }
    if (size != dataValues.size()) {
      throw new IOException("Data file is corrupt?! Data size does not match sample count!");
    }
    if (rate == null) {
      throw new IOException("Data file is corrupt?! Sample rate is not provided!");
    }
    if ((channels == null) || (channels <= 0) || (channels > 32)) {
      throw new IOException("Data file is corrupt?! Channel count is not provided!");
    }
    // Make sure the enabled channels are defined...
    if (enabledChannels == null) {
      enabledChannels = NumberUtils.getBitMask(channels);
    }

    int[] values = new int[size];
    long[] timestamps = new long[size];

    try {
      for (int i = 0; i < size; i++) {
        final String[] dataPair = dataValues.get(i);

        values[i] = (int) Long.parseLong(dataPair[0], 16);
        timestamps[i] = Long.parseLong(dataPair[1], 10) & Long.MAX_VALUE;
      }
    } catch (final NumberFormatException exception) {
      throw new IOException("Invalid data encountered.", exception);
    }

    // Allow the absolute length to be undefined, in which case the last
    // time stamp is used (+ some margin to be able to see the last
    // sample)...
    long absoluteLength = Math.max(absLen, timestamps[size - 1]);

    // Finally set the captured data, and notify all event listeners...
    aDataSet.setCapturedData(
        new CapturedData(
            values, timestamps, triggerPos, rate, channels, enabledChannels, absoluteLength));
  }