Java Code Examples for org.apache.commons.io.EndianUtils#readSwappedInteger()

private void readObjects(InputStream in) throws IOException {
  final int MAX_X = width  * DT1.Tile.SUBTILE_SIZE;
  final int MAX_Y = height * DT1.Tile.SUBTILE_SIZE;
  numObjects = version < 2 ? 0 : EndianUtils.readSwappedInteger(in);
  objects = numObjects == 0 ? Object.EMPTY_OBJECT_ARRAY : new Object[numObjects];
  for (int i = 0; i < numObjects; i++) {
    try {
      Object object = objects[i] = new Object().read(version, in);
      if (DEBUG_OBJECTS) Gdx.app.debug(TAG, object.toString());
      if (object.x < 0 || MAX_X <= object.x
       || object.y < 0 || MAX_Y <= object.y) {
        Gdx.app.error(TAG, "Object out of DS1 bounds: " + object);
      }
    } catch (Throwable t) {
      // Don't care, invalid object, skip it. Log it for posterity.
      Gdx.app.error(TAG, t.getMessage(), t);
    }
  }
}
 

/**
 * Queries the device for available sample rates.  Will always provide at
 * least the default 10 MHz sample rate.
 */
private void determineAvailableSampleRates() 
					throws LibUsbException, DeviceException
{
	mSampleRates.clear();
	
	mSampleRates.add( DEFAULT_SAMPLE_RATE );
	
	//Get a count of available sample rates.  If we get an exception, then
	//we're using an older firmware revision and only the default 10 MHz
	//rate is supported
	try
	{
		byte[] rawCount = readArray( Command.GET_SAMPLE_RATES, 0, 0, 4 );

		
		if( rawCount != null )
		{
			int count = EndianUtils.readSwappedInteger( rawCount, 0 );
			
			byte[] rawRates = readArray( Command.GET_SAMPLE_RATES, 0, 
					count, ( count * 4 ) );

			for( int x = 0; x < count; x++ )
			{
				int rate = EndianUtils.readSwappedInteger( rawRates, ( x * 4 ) );
				
				if( rate != DEFAULT_SAMPLE_RATE.getRate() )
				{
					mSampleRates.add( new AirspySampleRate( x, rate, 
							formatSampleRate( rate ) ) );
				}
			}
		}
	}
	catch( LibUsbException e )
	{
		//Press on, nothing else to do here ..
	}
}
 

private int readTags(InputStream in, int offset) throws IOException {
  for (int y = 0; y < height; y++) {
    for (int x = 0; x < width; x++) {
      tags[offset] = EndianUtils.readSwappedInteger(in);
      offset += numTags;
    }
  }

  return offset;
}
 

private void readGroups(InputStream in) throws IOException {
  if (version >= 12 && (tagType == 1 || tagType == 2)) {
    if (version >= 18) IOUtils.skip(in, Ints.BYTES);
    numGroups = EndianUtils.readSwappedInteger(in);
    groups = numGroups == 0 ? Group.EMPTY_GROUP_ARRAY : new Group[numGroups];
    for (int i = 0; i < numGroups; i++) {
      groups[i] = new Group().read(version, in);
      if (DEBUG_GROUPS) Gdx.app.debug(TAG, groups[i].toString());
    }
  } else {
    numGroups = 0;
    groups = Group.EMPTY_GROUP_ARRAY;
  }
}
 

private void readPaths(InputStream in) throws IOException {
  if (version >= 14 && in.available() >= Ints.BYTES) {
    numPaths = EndianUtils.readSwappedInteger(in);
    paths = numPaths == 0 ? Path.EMPTY_PATH_ARRAY : new Path[numPaths];
    for (int i = 0; i < numPaths; i++) {
      Path path = paths[i] = new Path().read(version, objects, in);
      if (DEBUG_PATHS) Gdx.app.debug(TAG, path.toString());
    }
  } else {
    numPaths = 0;
    paths = Path.EMPTY_PATH_ARRAY;
  }
}
 

Cell read(InputStream in, int orient) throws IOException {
  value       = EndianUtils.readSwappedInteger(in);
  mainIndex   = (short) ((value >>> MAIN_INDEX_OFFSET) & MAIN_INDEX_BITS);
  subIndex    = (short) ((value >>> SUB_INDEX_OFFSET)  & SUB_INDEX_BITS);
  orientation = (short) orient;
  return updateIndex();
}
 

Object read(int version, InputStream in) throws IOException {
  type  = EndianUtils.readSwappedInteger(in);
  id    = EndianUtils.readSwappedInteger(in);
  x     = EndianUtils.readSwappedInteger(in);
  y     = EndianUtils.readSwappedInteger(in);
  flags = version < 6 ? 0 : EndianUtils.readSwappedInteger(in);
  path  = null;
  return this;
}
 

Group read(int version, InputStream in) throws IOException {
  if (in.available() >= Ints.BYTES) x      = EndianUtils.readSwappedInteger(in);
  if (in.available() >= Ints.BYTES) y      = EndianUtils.readSwappedInteger(in);
  if (in.available() >= Ints.BYTES) width  = EndianUtils.readSwappedInteger(in);
  if (in.available() >= Ints.BYTES) height = EndianUtils.readSwappedInteger(in);
  if (version >= 13) {
    if (in.available() >= Ints.BYTES) unk  = EndianUtils.readSwappedInteger(in);
  }
  return this;
}
 

Path read(int version, Object[] objects, InputStream in) throws IOException {
  numPoints = EndianUtils.readSwappedInteger(in);
  points    = new Point[numPoints];
  x         = EndianUtils.readSwappedInteger(in);
  y         = EndianUtils.readSwappedInteger(in);

  Object object = null;
  for (int i = 0; i < objects.length; i++) {
    Object tmp = objects[i];
    if (tmp == null) continue;
    if (tmp.x != x || tmp.y != y) continue;
    if (object != null) Gdx.app.error(TAG, "More than one object is located at path position: " + this);
    object = tmp;
  }

  if (object == null) {
    Gdx.app.error(TAG, "No object associated with path: " + this);
    int skip = (version >= 15 ? 3 : 2) * Ints.BYTES;
    for (int p = 0; p < numPoints; p++) {
      in.skip(skip);
    }

    return this;
  }

  for (int p = 0; p < numPoints; p++) points[p] = new Point().read(version, in);
  object.path = this;
  return this;
}
 

Block(InputStream in) throws IOException {
  numEntries = EndianUtils.readSwappedInteger(in);
  entries = new Entry[numEntries];
  for (int i = 0; i < numEntries; i++) {
    entries[i] = new Entry(in);
    if (DEBUG_ENTRIES) Gdx.app.debug(TAG, entries[i].toString());
  }
}
 

Point read(int version, InputStream in) throws IOException {
  x      = EndianUtils.readSwappedInteger(in);
  y      = EndianUtils.readSwappedInteger(in);
  action = version < 15 ? 1 : EndianUtils.readSwappedInteger(in);
  return this;
}
 

/**
 * Delegates to {@link EndianUtils#readSwappedInteger(InputStream)}. 
 * @return the read long
 * @throws EOFException if an end of file is reached unexpectedly
 * @throws IOException if an I/O error occurs
 */
public int readInt()
    throws IOException, EOFException
{
    return EndianUtils.readSwappedInteger( in );
}
 

/**
 * Delegates to {@link EndianUtils#readSwappedInteger(InputStream)}. 
 * @return the read long
 * @throws EOFException if an end of file is reached unexpectedly
 * @throws IOException if an I/O error occurs
 */
public int readInt()
    throws IOException, EOFException
{
    return EndianUtils.readSwappedInteger( in );
}