Example usage for io.netty.buffer ByteBuf arrayOffset

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf arrayOffset.

Prototype

public abstract int arrayOffset();

Source Link

Document

Returns the offset of the first byte within the backing byte array of this buffer.

Usage

From source file:uk.co.thinkofdeath.prismarine.network.CipherCodec.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    byte[] data;//from   w  ww. j a  v  a 2s  .co m
    int offset = 0;
    int dataSize = in.readableBytes();
    if (!in.isDirect()) {
        data = in.array();
        offset = in.arrayOffset();
        in.skipBytes(in.readableBytes());
    } else {
        if (deDataBuffer.length < dataSize) {
            deDataBuffer = new byte[dataSize];
        }
        in.readBytes(deDataBuffer, 0, dataSize);
        data = deDataBuffer;
    }

    int size = cipherDecrypt.getOutputSize(dataSize);
    ByteBuf buf = ctx.alloc().heapBuffer(size);
    buf.writerIndex(cipherDecrypt.update(data, offset, dataSize, buf.array(), buf.arrayOffset()));
    out.add(buf);
}

From source file:uk.co.thinkofdeath.prismarine.network.CompressionCodec.java

License:Apache License

@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) throws Exception {
    MCByteBuf buf = new MCByteBuf(out);
    if (msg.readableBytes() < threshold) {
        buf.writeVarInt(0);/*from w w w.  j a v a2  s .  c o m*/
        buf.writeBytes(msg);
    } else {
        CompressionInfo ci = info.get();

        byte[] data;
        int offset = 0;
        int dataSize;
        // Handle both direct and heap buffers
        // heap buffers are faster in this case as they
        // do not require a copy
        if (!msg.isDirect()) {
            data = msg.array();
            offset = msg.arrayOffset();
            dataSize = msg.readableBytes();
            msg.skipBytes(msg.readableBytes());
        } else {
            dataSize = msg.readableBytes();
            if (ci.dataBuffer.length < dataSize) {
                ci.dataBuffer = new byte[dataSize];
            }
            msg.readBytes(ci.dataBuffer, 0, dataSize);
            data = ci.dataBuffer;
        }

        buf.writeVarInt(dataSize);

        ci.deflater.setInput(data, offset, dataSize);
        ci.deflater.finish();
        while (!ci.deflater.finished()) {
            int count = ci.deflater.deflate(ci.compBuffer);
            out.writeBytes(ci.compBuffer, 0, count);
        }
        ci.deflater.reset();
    }
}

From source file:uk.co.thinkofdeath.prismarine.network.CompressionCodec.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    MCByteBuf buf = new MCByteBuf(in);
    int size = buf.readVarInt();
    if (size == 0) {
        out.add(buf.readBytes(buf.readableBytes()));
    } else {/*from w  w  w  .  java2  s .  c om*/
        CompressionInfo ci = info.get();
        if (ci.decompBuffer.length < in.readableBytes()) {
            ci.decompBuffer = new byte[in.readableBytes()];
        }
        int count = in.readableBytes();
        in.readBytes(ci.decompBuffer, 0, count);
        ci.inflater.setInput(ci.decompBuffer, 0, count);

        // Use heap buffers so we can just access the internal array
        ByteBuf oBuf = ctx.alloc().heapBuffer(size);
        oBuf.writerIndex(ci.inflater.inflate(oBuf.array(), oBuf.arrayOffset(), size));
        out.add(oBuf);
        ci.inflater.reset();
    }
}