dap4/d4lib/src/main/java/dap4/dap4lib/ChunkInputStream.java
boolean
    readHeader(InputStream input)
            throws IOException
    {
        byte[] bytehdr = new byte[4];
        int red = input.read(bytehdr);
        if(red == -1) return false;
        if(red < 4)
            throw new IOException("Short binary chunk count");
        this.flags = ((int) bytehdr[0]) & 0xFF; // Keep unsigned
        bytehdr[0] = 0;
        ByteBuffer buf = ByteBuffer.wrap(bytehdr).order(ByteOrder.BIG_ENDIAN);
        this.chunksize = buf.getInt();
        this.avail = this.chunksize;
        return true;
    }
boolean
    readHeader(InputStream input)
            throws IOException
    {
        byte[] bytehdr = new byte[4];
        int red = input.read(bytehdr);
        if(red == -1) return false;
        if(red < 4)
            throw new IOException("Short binary chunk count");
        this.flags = ((int) bytehdr[0]) & 0xFF; // Keep unsigned
        bytehdr[0] = 0;
        ByteBuffer buf = ByteBuffer.wrap(bytehdr).order(ByteOrder.BIG_ENDIAN);
        this.chunksize = buf.getInt();
        this.avail = this.chunksize;
        return true;
    }
Read the size+flags header from the input stream and use it to
initialize the chunk state

@param input The input streamfrom which to read
@return true if header read false if immediate eof encountered