Example usage for java.nio ByteBuffer order

Introduction

In this page you can find the example usage for java.nio ByteBuffer order.

Prototype

Endianness order

To view the source code for java.nio ByteBuffer order.

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Document

The byte order of this buffer, default is BIG_ENDIAN .

Usage

From source file:com.kentdisplays.synccardboarddemo.Page.java

/**
 * Sets up the drawing object data for use in an OpenGL ES context.
 *
 * @param is InputStream to the page to load the path data from.
 *///from ww w.ja  v a2  s.  c  o m
public Page(InputStream is, int glProgram, int direction) {

    this.mModel = new float[16];
    this.mGlProgram = glProgram;

    // Calculate the coordinates from the given path.
    ArrayList<Path> paths = pathsFromSamplePageInputStream(is);
    float finalCoords[] = {};
    float finalNormals[] = {};
    float finalColors[] = {};
    mNumberOfPaths = paths.size();
    for (int i = 0; i < mNumberOfPaths; i++) {
        Path path = paths.get(i);
        float x1 = (path.x1 / 13942 * 2) - 1;
        float y1 = (path.y1 / 20280 * 2) - 1;
        float x2 = (path.x2 / 13942 * 2) - 1;
        float y2 = (path.y2 / 20280 * 2) - 1;
        float width = path.width / 3000;
        width = width < 0.013f ? 0.013f : width; // Width should be at least 0.013

        float distance = (float) Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
        float angle = (float) Math.PI / 2 - (float) Math.asin((x2 - x1) / distance);
        float xdiff = (width / 2) * (float) Math.sin(angle);
        float ydiff = (width / 2) * (float) Math.cos(angle);

        float coords[] = { x1 - xdiff, y1 - ydiff, 1.0f, // top left
                x2 - xdiff, y2 - ydiff, 1.0f, // bottom left
                x1 + xdiff, y1 + ydiff, 1.0f, // top right
                x2 - xdiff, y2 - ydiff, 1.0f, // bottom left
                x2 + xdiff, y2 + ydiff, 1.0f, // bottom right
                x1 + xdiff, y1 + ydiff, 1.0f, // top right
        };

        float normals[] = { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
                1.0f, 0.0f, 0.0f, 1.0f, };

        float colors[] = { 0.2f, 0.709803922f, 0.898039216f, 1.0f, 0.2f, 0.709803922f, 0.898039216f, 1.0f, 0.2f,
                0.709803922f, 0.898039216f, 1.0f, 0.2f, 0.709803922f, 0.898039216f, 1.0f, 0.2f, 0.709803922f,
                0.898039216f, 1.0f, 0.2f, 0.709803922f, 0.898039216f, 1.0f, };

        finalCoords = Floats.concat(finalCoords, coords);
        finalNormals = Floats.concat(finalNormals, normals);
        finalColors = Floats.concat(finalColors, colors);
    }

    ByteBuffer bbVertices = ByteBuffer.allocateDirect(finalCoords.length * 4);
    bbVertices.order(ByteOrder.nativeOrder());
    mPageVertices = bbVertices.asFloatBuffer();
    mPageVertices.put(finalCoords);
    mPageVertices.position(0);

    ByteBuffer bbNormals = ByteBuffer.allocateDirect(finalNormals.length * 4);
    bbNormals.order(ByteOrder.nativeOrder());
    mPageNormals = bbNormals.asFloatBuffer();
    mPageNormals.put(finalNormals);
    mPageNormals.position(0);

    ByteBuffer bbColors = ByteBuffer.allocateDirect(finalColors.length * 4);
    bbColors.order(ByteOrder.nativeOrder());
    mPageColors = bbColors.asFloatBuffer();
    mPageColors.put(finalColors);
    mPageColors.position(0);

    // Correctly place the page in the world.
    Matrix.setIdentityM(mModel, 0);
    switch (direction) {
    case 0:
        Matrix.translateM(mModel, 0, 0, 0, -mDistance); //Front.
        break;
    case 1:
        Matrix.translateM(mModel, 0, -mDistance, 0, 0); // Left.
        Matrix.rotateM(mModel, 0, 90, 0, 1f, 0);
        break;
    case 2:
        Matrix.translateM(mModel, 0, 0, 0, mDistance); // Behind.
        Matrix.rotateM(mModel, 0, 180, 0, 1f, 0);
        break;
    case 3:
        Matrix.translateM(mModel, 0, mDistance, 0, 0); // Right.
        Matrix.rotateM(mModel, 0, 270, 0, 1f, 0);
        break;
    }
}

---

From source file:org.apache.nifi.processors.evtx.parser.BinaryReader.java

/**
 * Reads 8 bytes in litte endian order and returns the UnsignedLong value
 *
 * @return the value//  w w w. j a  v  a 2  s .co m
 */
public UnsignedLong readQWord() {
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes, position, 8);
    position += 8;
    return UnsignedLong.fromLongBits(byteBuffer.order(ByteOrder.LITTLE_ENDIAN).getLong());
}

---

From source file:org.apache.nifi.processors.evtx.parser.BinaryReader.java

/**
 * Reads 4 bytes in little endian order and returns the UnsignedInteger value
 *
 * @return the value//from w w w  . j  a  va  2 s.  c  o m
 */
public UnsignedInteger readDWord() {
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes, position, 4);
    position += 4;
    return UnsignedInteger.fromIntBits(byteBuffer.order(ByteOrder.LITTLE_ENDIAN).getInt());
}

---

From source file:org.apache.nifi.processors.evtx.parser.BinaryReader.java

/**
 * Reads 4 bytes in big endian order and returns the UnsignedInteger value
 *
 * @return the value/*w w w .j a  va  2s.c om*/
 */
public UnsignedInteger readDWordBE() {
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes, position, 4);
    position += 4;
    return UnsignedInteger.fromIntBits(byteBuffer.order(ByteOrder.BIG_ENDIAN).getInt());
}

---

From source file:adapter.davis.DavisSensor.java

/**
 * Expecting ACK message./*from  w  w w . j a v a 2  s .c  o  m*/
 * @throws CommunicationException
 * @throws InterruptedException
 */
private void expectACK() throws CommunicationException, InterruptedException {
    logger.info("Expecting ACK");
    byte ans[] = this.expect(1);

    ByteBuffer wrapped = ByteBuffer.wrap(ans, 0, ans.length);
    wrapped.order(ByteOrder.LITTLE_ENDIAN);

    if (wrapped.get() != DavisReturnCodes.ACK)
        throw new CommunicationException("Didn't receive ACK");

    logger.info("Received ACK successful.");
}

---

From source file:au.org.ala.delta.io.BinaryKeyFile.java

public int writeToRecord(int recordNumber, List<Integer> values) {
    ByteBuffer bytes = ByteBuffer.allocate(values.size() * SIZE_INT_IN_BYTES);
    bytes.order(ByteOrder.LITTLE_ENDIAN);
    for (int value : values) {
        bytes.putInt(value);//from   w  w  w  . j  ava  2s  .c om
    }
    return writeToRecord(recordNumber, 0, bytes.array());
}

---

From source file:au.org.ala.delta.io.BinaryKeyFile.java

public int writeBooleansToRecord(int recordNumber, List<Boolean> values) {
    ByteBuffer bytes = ByteBuffer.allocate(values.size() * SIZE_INT_IN_BYTES);
    bytes.order(ByteOrder.LITTLE_ENDIAN);
    for (boolean value : values) {
        bytes.putInt(value ? 1 : 0);/*w w  w  . ja va2  s. c  o m*/
    }
    return writeToRecord(recordNumber, 0, bytes.array());
}

---

From source file:au.org.ala.delta.io.BinaryKeyFile.java

public int writeFloatsToRecord(int recordNumber, List<Float> values) {
    ByteBuffer bytes = ByteBuffer.allocate(values.size() * SIZE_INT_IN_BYTES);
    bytes.order(ByteOrder.LITTLE_ENDIAN);
    for (float value : values) {
        bytes.putFloat(value);// w w  w  .  jav  a2 s  .c  o m
    }
    return writeToRecord(recordNumber, 0, bytes.array());
}

---

From source file:au.org.ala.delta.io.BinaryKeyFile.java

/**
 * Designed to allow headers and index records to be overwritten.
 * //from   w  ww  .ja v  a  2s .co m
 * @param recordNumber
 *            the first (of possibily many, depending on the number of
 *            values) record to be overwritten.
 * @param values
 *            the values to write, starting at record, recordNumber..
 */
public void overwriteRecord(int recordNumber, List<Integer> values) {
    if (!_occupiedRecords.contains(recordNumber)) {
        throw new IllegalArgumentException("Record " + recordNumber + " has not been allocated.");
    }
    ByteBuffer bytes = ByteBuffer.allocate(values.size() * SIZE_INT_IN_BYTES);
    bytes.order(ByteOrder.LITTLE_ENDIAN);
    for (int value : values) {
        bytes.putInt(value);
    }
    seekToRecord(recordNumber, 0);
    write(bytes.array());
}

---

From source file:org.openhab.binding.modbus.internal.ModbusBinding.java

private DecimalType extractStateFromRegisters(InputRegister[] registers, int index, String type) {
    if (type.equals(ModbusBindingProvider.VALUE_TYPE_BIT)) {
        return new DecimalType((registers[index / 16].toUnsignedShort() >> (index % 16)) & 1);
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_INT8)) {
        return new DecimalType(registers[index / 2].toBytes()[1 - (index % 2)]);
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_UINT8)) {
        return new DecimalType((registers[index / 2].toUnsignedShort() >> (8 * (index % 2))) & 0xff);
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_INT16)) {
        ByteBuffer buff = ByteBuffer.allocate(2);
        buff.put(registers[index].toBytes());
        return new DecimalType(buff.order(ByteOrder.BIG_ENDIAN).getShort(0));
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_UINT16)) {
        return new DecimalType(registers[index].toUnsignedShort());
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_INT32)) {
        ByteBuffer buff = ByteBuffer.allocate(4);
        buff.put(registers[index * 2 + 0].toBytes());
        buff.put(registers[index * 2 + 1].toBytes());
        return new DecimalType(buff.order(ByteOrder.BIG_ENDIAN).getInt(0));
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_UINT32)) {
        ByteBuffer buff = ByteBuffer.allocate(8);
        buff.position(4);/*from  w w w  .j  a v  a  2 s.c  om*/
        buff.put(registers[index * 2 + 0].toBytes());
        buff.put(registers[index * 2 + 1].toBytes());
        return new DecimalType(buff.order(ByteOrder.BIG_ENDIAN).getLong(0));
    } else if (type.equals(ModbusBindingProvider.VALUE_TYPE_FLOAT32)) {
        ByteBuffer buff = ByteBuffer.allocate(4);
        buff.put(registers[index * 2 + 0].toBytes());
        buff.put(registers[index * 2 + 1].toBytes());
        return new DecimalType(buff.order(ByteOrder.BIG_ENDIAN).getFloat(0));
    } else {
        throw new IllegalArgumentException();
    }
}

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