Example usage for java.nio ByteBuffer position

Introduction

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

Prototype

public final int position()

Source Link

Document

Returns the position of this buffer.

Usage

From source file:Main.java

public static boolean isPredessorEqualsP(ByteBuffer bb1, ByteBuffer bb2) {
    return isPredessorEquals(bb1, bb1.position(), bb1.remaining(), bb2, bb2.position(), bb2.remaining());
}

From source file:Main.java

public final static boolean equalsP(final ByteBuffer bb, final byte[] bytes) {
    return equals(bb.array(), bb.position(), bytes);
}

From source file:Main.java

public final static boolean containsP(final ByteBuffer bb1, final ByteBuffer bb2) {
    return contains(bb1.array(), bb1.position(), bb1.limit(), bb2.array(), bb2.position(), bb2.limit());
}

From source file:Main.java

public static final int stripP(ByteBuffer bb, final byte crimpChar) {
    final byte[] array = bb.array();
    final int position = bb.position();
    final int limit = bb.limit();
    return bb.limit(strip(array, position, limit, crimpChar)).limit();
}

From source file:Main.java

/**
 * Like {@link #parseEAc3SyncframeAudioSampleCount(byte[])} but reads from a byte buffer. The
 * buffer position is not modified./*from  w  ww. j a v  a 2s .  c o  m*/
 *
 * @see #parseEAc3SyncframeAudioSampleCount(byte[])
 */
public static int parseEAc3SyncframeAudioSampleCount(ByteBuffer buffer) {
    // See ETSI TS 102 366 subsection E.1.2.2.
    int fscod = (buffer.get(buffer.position() + 4) & 0xC0) >> 6;
    return AUDIO_SAMPLES_PER_AUDIO_BLOCK * (fscod == 0x03 ? 6
            : BLOCKS_PER_SYNCFRAME_BY_NUMBLKSCOD[(buffer.get(buffer.position() + 4) & 0x30) >> 4]);
}

From source file:Main.java

public static final boolean isSuccessorP(final ByteBuffer bb1, final ByteBuffer bb2) {
    return isSuccessor(bb1, bb1.position(), bb1.remaining(), bb2, bb2.position(), bb2.remaining());
}

From source file:Main.java

/**
 * Reads the number of audio samples represented by a TrueHD syncframe. The buffer's position is
 * not modified.//from   w  ww. ja v  a 2s .c om
 *
 * @param buffer The {@link ByteBuffer} from which to read the syncframe.
 * @param offset The offset of the start of the syncframe relative to the buffer's position.
 * @return The number of audio samples represented by the syncframe.
 */
public static int parseTrueHdSyncframeAudioSampleCount(ByteBuffer buffer, int offset) {
    // TODO: Link to specification if available.
    boolean isMlp = (buffer.get(buffer.position() + offset + 7) & 0xFF) == 0xBB;
    return 40 << ((buffer.get(buffer.position() + offset + (isMlp ? 9 : 8)) >> 4) & 0x07);
}

From source file:Main.java

public final static void replaceP(final ByteBuffer lineBB, final byte from, final byte to) {
    final byte[] array = lineBB.array();
    final int offset = lineBB.position();
    final int limit = lineBB.limit();
    replace(array, offset, limit, from, to);
}

From source file:Main.java

public static void copy(ReadableByteChannel in, WritableByteChannel out) throws IOException {
    // First, we need a buffer to hold blocks of copied bytes.
    ByteBuffer buffer = ByteBuffer.allocateDirect(32 * 1024);

    // Now loop until no more bytes to read and the buffer is empty
    while (in.read(buffer) != -1 || buffer.position() > 0) {
        // The read() call leaves the buffer in "fill mode". To prepare
        // to write bytes from the bufferwe have to put it in "drain mode"
        // by flipping it: setting limit to position and position to zero
        buffer.flip();/*ww w  .  ja v  a  2s.  c om*/

        // Now write some or all of the bytes out to the output channel
        out.write(buffer);

        // Compact the buffer by discarding bytes that were written,
        // and shifting any remaining bytes. This method also
        // prepares the buffer for the next call to read() by setting the
        // position to the limit and the limit to the buffer capacity.
        buffer.compact();
    }
}

From source file:Main.java

/**
 * Finds next Nth MPEG bitstream marker 0x000001xx and returns the data that
 * preceeds it as a ByteBuffer slice// w  w  w .ja  va 2 s  .  co m
 * 
 * Segment byte order is always little endian
 * 
 * @param buf
 * @return
 */
public static final ByteBuffer gotoMarker(ByteBuffer buf, int n, int mmin, int mmax) {
    if (!buf.hasRemaining())
        return null;

    int from = buf.position();
    ByteBuffer result = buf.slice();
    result.order(ByteOrder.BIG_ENDIAN);

    int val = 0xffffffff;
    while (buf.hasRemaining()) {
        val = (val << 8) | (buf.get() & 0xff);
        if (val >= mmin && val <= mmax) {
            if (n == 0) {
                buf.position(buf.position() - 4);
                result.limit(buf.position() - from);
                break;
            }
            --n;
        }
    }
    return result;
}