使用AudioRecord和AudioTrack实现AoIP（基于IP的音频）

时间：2013-10-31 07:06:24

标签： java android datagram audiorecord audiotrack

我想为我的项目制作一个应用程序。它看起来像一个Android呼叫应用程序，它可以通过网络内的IP地址和Android手机发送语音。但我的问题是我无法收到音频。我的录音工作正常。

这是我的代码：

MainActivity.java 

import java.net.DatagramSocket;
import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import com.example.voip.Microphone;
import com.example.voip.Speaker;
public class MainActivity extends Activity {
     DatagramSocket sock = null;
     ArrayList<String> on = null;
     Button btnStart;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
        btnStart = (Button) findViewById(R.id.btnStart);
        btnStart.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                disp();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void disp(){
        on = new ArrayList<String>();
           on.add("192.168.1.103");
            try{
                sock = new DatagramSocket(4003);
            }catch(Exception e){

            }
            Thread mic = new Thread(new Microphone(sock, 4003, on));
            mic.start();
    }
}

Microphone.java 

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.ArrayList;

import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;




public class Microphone implements Runnable{

    private DatagramSocket sock = null;
    private int port = 0;
    int buffsize = 0;
    AudioRecord ar;
    private ArrayList<String> on = null;

    public Microphone(DatagramSocket d,int recPort,ArrayList<String> joi) {
        this.sock = d;
        this.on = joi;
        this.port =recPort;
    }

    @Override
    public void run(){
        try {


            buffsize = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
            ar = new AudioRecord(MediaRecorder.AudioSource.MIC, 44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buffsize);
            ar.startRecording();

            byte[] soundData = new byte[1];
            int bytesRead = 0;
            while (bytesRead != -1) {
                bytesRead = ar.read(soundData, 0, soundData.length);

                if (bytesRead >= 0) {
                    for (int y = 0; y < on.size(); y++) {
                        DatagramPacket pac = new DatagramPacket(soundData,soundData.length,InetAddress.getByName(on.get(y).toString()),port);
                        sock.send(pac);
                    }
                }
                Thread.sleep(0);
            }

            /*
            AudioFormat af = new AudioFormat(8000.0f, 8, 1, true, false);
            DataLine.Info info = new DataLine.Info(TargetDataLine.class, af);
            TargetDataLine microphone = (TargetDataLine) AudioSystem.getLine(info);

            microphone.open(af);
            microphone.start();

            byte[] soundData = new byte[1];
            int bytesRead = 0;
            while (bytesRead != -1) {
                bytesRead = microphone.read(soundData, 0, soundData.length);

                if (bytesRead >= 0) {
                    for (int y = 0; y < on.size(); y++) {
                        DatagramPacket pac = new DatagramPacket(soundData,
                                soundData.length,
                                InetAddress.getByName(on.getElementAt(y).toString()),
                                port);
                        sock.send(pac);
                    }
                }
                Thread.sleep(0);
            }

        } catch (Exception e) {
        }
    }
     */
        }catch(Exception e){

        }
    }

    public void setSock(DatagramSocket sock) {
        this.sock = sock;
    }

    /**
     * @param port the port to set
     */
    public void setPort(int port) {
        this.port = port;
    }

    /**
     * @param on the on to set
     */
    public void setOn(ArrayList<String> on) {
        this.on = on;
    }
}

Speaker.java 

    import java.io.IOException;
    import java.net.DatagramPacket;
    import java.net.DatagramSocket;

    import android.media.AudioFormat;
    import android.media.AudioManager;
    import android.media.AudioRecord;
    import android.media.AudioTrack;
    import android.media.MediaRecorder;
    import android.net.rtp.AudioStream;

    public class Speaker implements Runnable {
         private int freq = 44100 ;

            private Thread Rthread = null;

            private AudioManager audioManager = null;
            private AudioTrack inSpeaker = null;
            byte[] buffer = new byte[freq];
        private DatagramSocket soc = null;
        DatagramPacket pack = null;
       // SourceDataLine inSpeaker = null;




        public Speaker(DatagramSocket s) {

            try {
                /*
                this.soc = s;
                AudioFormat af = new AudioFormat(8000.0f, 8, 1, true, false);
                DataLine.Info info = new DataLine.Info(SourceDataLine.class, af);
                inSpeaker = (SourceDataLine) AudioSystem.getLine(info);
                inSpeaker.open(af);
                */

                int bufferSize = AudioRecord.getMinBufferSize(freq,
                        AudioFormat.CHANNEL_CONFIGURATION_MONO,
                        AudioFormat.ENCODING_PCM_16BIT);
                inSpeaker = new AudioTrack(AudioManager.ROUTE_HEADSET, freq,
                        AudioFormat.CHANNEL_CONFIGURATION_MONO,
                        MediaRecorder.AudioEncoder.AMR_NB, bufferSize,
                        AudioTrack.MODE_STREAM);



                System.out.println("Speak");

            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }




        public void run() {
            inSpeaker.setPlaybackRate(freq);
            int bytesRead = 1;
            byte[] inSound = new byte[1];

            inSpeaker.play();

            while (bytesRead != -1) {
                pack = new DatagramPacket(inSound, inSound.length);

                try {
                    soc.receive(pack);
                    if (bytesRead >= 0) {
                    inSpeaker.write(inSound, 0, bytesRead);

                    }

                } catch (IOException ex) {
                    System.out.println(ex.getMessage());
                }
            }
        }

        public void setSoc(DatagramSocket soc) {
            this.soc = soc;
        }



    }

Receiver.java
package com.example.call;

import java.net.DatagramSocket;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

import com.example.voip.Speaker;

public class Receiver extends BroadcastReceiver{
DatagramSocket sock;
    @Override
    public void onReceive(Context arg0, Intent arg1) {
        // TODO Auto-generated method stub
        try{
        sock = new DatagramSocket(4003);
        }catch(Exception e){

        }
        Thread speak = new Thread(new Speaker(sock));
        speak.start();
    }

}

的AndroidManifest.xml 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.call"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="16" />
    <uses-permission android:name="android.permission.USE_SIP" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"></uses-permission>

    <uses-feature android:name="android.hardware.microphone" android:required="true"/>
    <uses-feature android:name="android.hardware.wifi" android:required="true" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.call.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name="com.example.call.Receiver"></receiver>
    </application>

</manifest>

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="20dip">

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        android:scaleType="fitCenter"/>

        <TextView  
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Info"
        android:layout_weight="1.0"
        android:textSize="20dip"/>

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

        <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/btnStart"
                android:text="Start Recording"
                android:layout_weight="1.0"/>

                <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/btnStop"
                android:text="Stop Recording"
                android:layout_weight="1.0"/>
    </LinearLayout>
</LinearLayout>

完全没有错误。但是我收不到任何声音。请帮忙=（

提前致谢。

1 个答案:

答案 0 :(得分：0)

Speaker.java中的此代码不正确：

    int bufferSize = AudioRecord.getMinBufferSize(freq,
            AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT);
    inSpeaker = new AudioTrack(AudioManager.ROUTE_HEADSET, freq,
                AudioFormat.CHANNEL_CONFIGURATION_MONO,
                MediaRecorder.AudioEncoder.AMR_NB, bufferSize,
                AudioTrack.MODE_STREAM);

应该是：

    int bufferSize = AudioTrack.getMinBufferSize(freq,
            AudioFormat.CHANNEL_OUT_MONO,
            AudioFormat.ENCODING_PCM_16BIT);
    inSpeaker = new AudioTrack(AudioManager.STREAM_MUSIC, freq,
                AudioFormat.CHANNEL_OUT_MONO,
                AudioFormat.ENCODING_PCM_16BIT, bufferSize,
                AudioTrack.MODE_STREAM);
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