Android Open Source - streamvid Audio Stream

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (C) 2011-2014 GUIGUI Simon, fyhertz@gmail.com
 * //w  w  w  . j av  a  2s.c  om
 * 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.majorkernelpanic.streaming.audio;

import java.io.IOException;

import net.majorkernelpanic.streaming.MediaStream;
import android.media.MediaRecorder;
import android.util.Log;

/** 
 * Don't use this class directly.
 */
public abstract class AudioStream  extends MediaStream {

  protected int mAudioSource;
  protected int mOutputFormat;
  protected int mAudioEncoder;
  protected AudioQuality mRequestedQuality = AudioQuality.DEFAULT_AUDIO_QUALITY.clone();
  protected AudioQuality mQuality = mRequestedQuality.clone();
  
  public AudioStream() {
    setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
  }
  
  public void setAudioSource(int audioSource) {
    mAudioSource = audioSource;
  }

  public void setAudioQuality(AudioQuality quality) {
    mRequestedQuality = quality;
  }
  
  /** 
   * Returns the quality of the stream.  
   */
  public AudioQuality getAudioQuality() {
    return mQuality;
  }  
  
  protected void setAudioEncoder(int audioEncoder) {
    mAudioEncoder = audioEncoder;
  }
  
  protected void setOutputFormat(int outputFormat) {
    mOutputFormat = outputFormat;
  }
  
  @Override
  protected void encodeWithMediaRecorder() throws IOException {
    
    // We need a local socket to forward data output by the camera to the packetizer
    createSockets();

    Log.v(TAG,"Requested audio with "+mQuality.bitRate/1000+"kbps"+" at "+mQuality.samplingRate/1000+"kHz");
    
    mMediaRecorder = new MediaRecorder();
    mMediaRecorder.setAudioSource(mAudioSource);
    mMediaRecorder.setOutputFormat(mOutputFormat);
    mMediaRecorder.setAudioEncoder(mAudioEncoder);
    mMediaRecorder.setAudioChannels(1);
    mMediaRecorder.setAudioSamplingRate(mQuality.samplingRate);
    mMediaRecorder.setAudioEncodingBitRate(mQuality.bitRate);
    
    // We write the ouput of the camera in a local socket instead of a file !      
    // This one little trick makes streaming feasible quiet simply: data from the camera
    // can then be manipulated at the other end of the socket
    mMediaRecorder.setOutputFile(mSender.getFileDescriptor());

    mMediaRecorder.prepare();
    mMediaRecorder.start();

    try {
      // mReceiver.getInputStream contains the data from the camera
      // the mPacketizer encapsulates this stream in an RTP stream and send it over the network
      mPacketizer.setInputStream(mReceiver.getInputStream());
      mPacketizer.start();
      mStreaming = true;
    } catch (IOException e) {
      stop();
      throw new IOException("Something happened with the local sockets :/ Start failed !");
    }
    
  }
  
}

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