content: /*******************************************************************************
   * Software Name : RCS IMS Stack
   *
   * Copyright (C) 2010-2016 Orange.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   ******************************************************************************/
  
  package com.orangelabs.rcs.core.ims.protocol.rtp.core;
  
  /**
   * RTCP utils.
   * 
   * @author hlxn7157
   */
  public class RtcpPacketUtils {
  
      /**
       * Convert 64 bit long to n bytes.
       * 
       * @param data data
       * @param n desired number of bytes to convert the long to.
       * @return buffer
       */
      public static byte[] longToBytes(long data, int n) {
          byte buf[] = new byte[n];
          for (int i = n - 1; i >= 0; i--) {
              buf[i] = (byte) data;
              data = data >> 8;
          }
          return buf;
      }
  
      /**
       * Append two byte arrays.
       * 
       * @param pck1 first packet.
       * @param pck2 second packet.
       * @return concatenated packet.
       */
      public static byte[] append(byte[] pck1, byte[] pck2) {
          byte packet[] = new byte[pck1.length + pck2.length];
          for (int i = 0; i < pck1.length; i++)
              packet[i] = pck1[i];
          for (int i = 0; i < pck2.length; i++)
              packet[i + pck1.length] = pck2[i];
          return packet;
      }
  };
  