IntellitracFrameDecoder.java 文件源码

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception {

    // Check minimum length
    if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
        return null;
    }

    // Check for sync packet
    if (buf.getUnsignedShort(buf.readerIndex()) == 0xFAF8) {
        ChannelBuffer syncMessage = buf.readBytes(8);
        if (channel != null) {
            channel.write(syncMessage);
        }
    }

    return super.decode(ctx, channel, buf);
}