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POStreaming voice between Android Phones over WiFi
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copied!<p>I'm trying to stream audio from the mic from 1 Android to another over WiFi. After looking at some examples I made 2 applications with a single activity in each, 1 to capture and send audio and the other to receive.</p> <p>I've used the Audiorecord and Audiotrack classes to capture and play. However, i just hear some crackling sound (which has now stopped after i made some changes though i reverted back)</p> <p>The activity to send voice. </p> <pre><code>public class VoiceSenderActivity extends Activity { private EditText target; private TextView streamingLabel; private Button startButton,stopButton; public byte[] buffer; public static DatagramSocket socket; private int port=50005; //which port?? AudioRecord recorder; //Audio Configuration. private int sampleRate = 8000; //How much will be ideal? private int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO; private int audioFormat = AudioFormat.ENCODING_PCM_16BIT; private boolean status = true; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); target = (EditText) findViewById (R.id.target_IP); streamingLabel = (TextView) findViewById(R.id.streaming_label); startButton = (Button) findViewById (R.id.start_button); stopButton = (Button) findViewById (R.id.stop_button); streamingLabel.setText("Press Start! to begin"); startButton.setOnClickListener (startListener); stopButton.setOnClickListener (stopListener); } private final OnClickListener stopListener = new OnClickListener() { @Override public void onClick(View arg0) { status = false; recorder.release(); Log.d("VS","Recorder released"); } }; private final OnClickListener startListener = new OnClickListener() { @Override public void onClick(View arg0) { status = true; startStreaming(); } }; public void startStreaming() { Thread streamThread = new Thread(new Runnable() { @Override public void run() { try { int minBufSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat); DatagramSocket socket = new DatagramSocket(); Log.d("VS", "Socket Created"); byte[] buffer = new byte[minBufSize]; Log.d("VS","Buffer created of size " + minBufSize); DatagramPacket packet; final InetAddress destination = InetAddress.getByName(target.getText().toString()); Log.d("VS", "Address retrieved"); recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,sampleRate,channelConfig,audioFormat,minBufSize); Log.d("VS", "Recorder initialized"); recorder.startRecording(); while(status == true) { //reading data from MIC into buffer minBufSize = recorder.read(buffer, 0, buffer.length); //putting buffer in the packet packet = new DatagramPacket (buffer,buffer.length,destination,port); socket.send(packet); } } catch(UnknownHostException e) { Log.e("VS", "UnknownHostException"); } catch (IOException e) { Log.e("VS", "IOException"); } } }); streamThread.start(); } } </code></pre> <p>The activity to receive voice</p> <pre><code>public class VoiceReceiverActivity extends Activity { private Button receiveButton,stopButton; public static DatagramSocket socket; private AudioTrack speaker; //Audio Configuration. private int sampleRate = 8000; //How much will be ideal? private int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO; private int audioFormat = AudioFormat.ENCODING_PCM_16BIT; private boolean status = true; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); receiveButton = (Button) findViewById (R.id.receive_button); stopButton = (Button) findViewById (R.id.stop_button); findViewById(R.id.receive_label); receiveButton.setOnClickListener(receiveListener); stopButton.setOnClickListener(stopListener); } private final OnClickListener stopListener = new OnClickListener() { @Override public void onClick(View v) { status = false; speaker.release(); Log.d("VR","Speaker released"); } }; private final OnClickListener receiveListener = new OnClickListener() { @Override public void onClick(View arg0) { status = true; startReceiving(); } }; public void startReceiving() { Thread receiveThread = new Thread (new Runnable() { @Override public void run() { try { DatagramSocket socket = new DatagramSocket(50005); Log.d("VR", "Socket Created"); byte[] buffer = new byte[256]; //minimum buffer size. need to be careful. might cause problems. try setting manually if any problems faced int minBufSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat); speaker = new AudioTrack(AudioManager.STREAM_MUSIC,sampleRate,channelConfig,audioFormat,minBufSize,AudioTrack.MODE_STREAM); speaker.play(); while(status == true) { try { DatagramPacket packet = new DatagramPacket(buffer,buffer.length); socket.receive(packet); Log.d("VR", "Packet Received"); //reading content from packet buffer=packet.getData(); Log.d("VR", "Packet data read into buffer"); //sending data to the Audiotrack obj i.e. speaker speaker.write(buffer, 0, minBufSize); Log.d("VR", "Writing buffer content to speaker"); } catch(IOException e) { Log.e("VR","IOException"); } } } catch (SocketException e) { Log.e("VR", "SocketException"); } } }); receiveThread.start(); } } </code></pre> <p>I used wireshark to check if the packets are being sent and i can see the packets. The source however, is the MAC address of the sending device and destination too something like a physical address. Not sure if this is relevant though.</p> <p>So what's the problem with?</p>

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