Example usage for java.lang System arraycopy

Introduction

In this page you can find the example usage for java.lang System arraycopy.

Prototype

@HotSpotIntrinsicCandidate
public static native void arraycopy(Object src, int srcPos, Object dest, int destPos, int length);

Source Link

Document

Copies an array from the specified source array, beginning at the specified position, to the specified position of the destination array.

Usage

From source file:Main.java

public static byte[] NV21toNV12(byte[] input, int width, int height) {
    final int frameSize = width * height;
    final int qFrameSize = frameSize / 4;
    System.arraycopy(input, 0, preAllocatedBufferColor, 0, frameSize); // Y
    for (int i = 0; i < qFrameSize; i++) {
        preAllocatedBufferColor[frameSize + i * 2] = input[frameSize + i * 2 + 1]; // Cb (U)
        preAllocatedBufferColor[frameSize + i * 2 + 1] = input[frameSize + i * 2]; // Cr (V)
    }//w w w .j av  a 2 s .  c  om
    return preAllocatedBufferColor;
}

From source file:Main.java

public static byte[] NV21toYV12(byte[] input, int width, int height) {
    final int frameSize = width * height;
    final int qFrameSize = frameSize / 4;
    System.arraycopy(input, 0, preAllocatedBufferColor, 0, frameSize); // Y
    for (int i = 0; i < qFrameSize; i++) {
        preAllocatedBufferColor[frameSize + i + qFrameSize] = input[frameSize + i * 2 + 1]; // Cb (U)
        preAllocatedBufferColor[frameSize + i] = input[frameSize + i * 2]; // Cr (V)
    }/* w  ww.  j  ava 2  s .  c  o m*/
    return preAllocatedBufferColor;
}

From source file:Main.java

public static void transposeMatrix(float[][] origMat, boolean scaleOrNo) {
    //float [][] outMat = new float[origMat.length][origMat.length]; 
    for (int i = 0; i < origMat.length; i++) {
        System.arraycopy(origMat[i], 0, tempMat[i], 0, origMat.length);
    }//ww w  .  j  av  a2  s  . co  m
    for (int row = 0; row < origMat.length; row++) {
        for (int col = 0; col < origMat.length; col++) {
            if (scaleOrNo) {
                origMat[col][row] = tempMat[row][col] / (float) origMat.length;
            } else {
                origMat[col][row] = tempMat[row][col];
            }
        }
    }
    return;

}

From source file:Main.java

public static byte[] uniteBytes(byte[]... data) {
    int length = 0;
    for (byte[] msg : data) {
        length += msg.length;/*from  w w w  .  ja v  a2s .  c om*/
    }
    byte[] newData = new byte[length];
    int i = 0;
    for (byte[] msg : data) {
        System.arraycopy(msg, 0, newData, i, msg.length);
        i += msg.length;
    }

    return newData;
}

From source file:Main.java

public static String getStr(byte[] b, int index) {
    int i;//w  ww  . j  a v  a  2 s  . c  o  m
    for (i = index; i < b.length; i++) {
        if (b[i] == 0)
            break;
    }
    if (i == index)
        return "";
    byte[] str = new byte[i - index];
    System.arraycopy(b, index, str, 0, i - index);
    return new String(str);
}

From source file:Main.java

static void convertToFixedLength(byte[] src, byte[] dest, int destOff, int destLen) {
    if (src.length < destLen) {
        int padding = destLen - src.length;
        for (int i = destOff; i < destOff + padding; i++)
            dest[i] = 0;/*www  . j  a va 2s.c om*/
        System.arraycopy(src, 0, dest, destOff + padding, src.length);
    } else {
        int srcOff = src.length - destLen;
        System.arraycopy(src, srcOff, dest, destOff, destLen);
    }
}

From source file:Main.java

public static byte[] intArrayToByteArray(int[] buffer) {
    byte[] buf = new byte[buffer.length * 4];
    byte[] bf;/*from w ww .  j  a v a 2  s .  c  o m*/
    for (int i = 0; i < buffer.length; i++) {
        bf = intToByteArray(buffer[i]);
        System.arraycopy(bf, 0, buf, i * 4, 4);
    }
    return buf;
}

From source file:Main.java

@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public static <T> T[] concatenate(T[] first, T[] second) {
    T[] result = Arrays.copyOf(first, first.length + second.length);
    System.arraycopy(second, 0, result, first.length, second.length);
    return result;
}

From source file:ArrayUtil.java

/**
 * Doubles the size of an array// w  ww  . j a v a  2  s. c o m
 * 
 * @param in
 * @return The new array
 */
public static String[] grow(String[] in) {
    String[] na = new String[in.length * 2];
    System.arraycopy(in, 0, na, 0, in.length);
    return na;
}

From source file:Main.java

public static byte[] copyOfRange(byte[] original, int from, int to) {
    int newLength = to - from;
    if (newLength < 0) {
        throw new IllegalArgumentException(from + " > " + to);
    } else {/*from w ww . j  a  v a  2 s.  co  m*/
        byte[] copy = new byte[newLength];
        System.arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength));
        return copy;
    }
}