Android Open Source - voicelink A A C L A T Mun Packetizer

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2011-2014 GUIGUI Simon, fyhertz@gmail.com
 * // w  w w .  j av a  2s. co  m
 * This file is part of libstreaming (https://github.com/fyhertz/libstreaming)
 * 
 * Spydroid is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this source code; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package net.audio.recieve;

import java.net.DatagramPacket;
import java.nio.ByteBuffer;

import android.annotation.SuppressLint;
import android.media.MediaCodec;
import android.util.Log;

/**
 * RFC 3640.
 * 
 * Encapsulates AAC Access Units in RTP packets as specified in the RFC 3640.
 * This packetizer is used by the AACStream class in conjunction with the
 * MediaCodec API introduced in Android 4.1 (API Level 16).
 * 
 */
@SuppressLint("NewApi")
public class AACLATMunPacketizer implements Runnable {

  private final static String TAG = "AACLATMunPacketizer";

  private Thread thread;

  protected static final int rtphl = RecieveSocket.RTP_HEADER_LENGTH;

  // Maximum size of RTP packets
  protected final static int MAXPACKETSIZE = RecieveSocket.MTU - 28;

  public RecieveSocket recieveSocket = null;

  public MediaCodec decoder;
  public ByteBuffer[] inputDecoderBuffers;

  public AACLATMunPacketizer() {
    super();
  }

  public void start() {
    if (thread == null) {
      thread = new Thread(this);
      thread.start();
    }
  }

  public void stop() {
    if (thread != null) {
      // mMediaCodecInputStream.close();

      thread.interrupt();
      try {
        thread.join();
      } catch (InterruptedException e) {
      }
      thread = null;
    }
  }

  int unPackIndex = 0;

  @SuppressLint("NewApi")
  public void run() {
    Log.e(TAG, "AAC LATM unpacketizer started !");
    DatagramPacket packingPacket;
    while (!Thread.interrupted()) {
      Log.e(TAG, "unpacking loop running !");
      if (unPackIndex < recieveSocket.packetIndex) {
        if (recieveSocket.packetIndex - unPackIndex > 10) {
          unPackIndex = recieveSocket.packetIndex - 5;
        }
        packingPacket = recieveSocket.mPackets[unPackIndex];
        int inputBufferIndex = decoder.dequeueInputBuffer(-1);
        if (inputBufferIndex >= 0) {
          ByteBuffer inputBuffer = inputDecoderBuffers[inputBufferIndex];
          inputBuffer.clear();
          byte[] data = packingPacket.getData();

          byte[] dataNormalized = new byte[data.length - 16];
          System.arraycopy(data, 16, dataNormalized, 0, data.length - 16);
          inputBuffer.put(dataNormalized);

          decoder.queueInputBuffer(inputBufferIndex, 0, data.length, 0, 0);
        }
        unPackIndex++;
        Log.e(TAG, "unPack A packet  unPackIndex=" + unPackIndex);
      } else {
        try {
          Log.e(TAG, "sleep");
          Thread.sleep(50);
        } catch (InterruptedException e) {
        }
      }
    }
    Log.e(TAG, "unpacking loop exit!!!!!!!!!!!");
  }

}

Java Source Code List

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