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我正在爲我的論文做一個VoIP應用程序。我想知道是否有人可以幫助我這種情況下: 我有兩個線程,AudioThread和AudioSendThread。第一個是通過DatagramSocket接收音頻數據包並在手機中播放的收聽者。第二個是錄音機,可以抓住20毫秒的聲音並將其發送到另一個設備。我已經在java中實現了它,但是它非常慢,所以我決定嘗試OpenSL,但是我沒有找到任何這樣的文檔。使用OpenSL的Android語音通話
這是AudioSendThread
public class AudioSendThread implements Runnable {
private final static String TAG = "AudioSndThread";
private boolean createdAudioP = false;
private DatagramSocket audioSndSocket;
private String ipAddr;
private byte[] buffer;
public AudioSendThread(Object o){
this.ipAddr = //getting IpAddress
audioSndSocket = (DatagramSocket)o;
}
@Override
public void run() {
if(!createdAudioP)
createdAudioP = createAudioRecorder();
if(createdAudioP)
startRecording();
DatagramPacket packet = null;
while(true){
byte[] buffer = readAudio(20); //read 20 milliseconds of audio, this is the one i would like to implement in OpenSL
try {
packet = new DatagramPacket(buffer, buffer.length, InetAddress.getByName(this.ipAddr), PORT.AUDIO);
audioSndSocket.send(packet);
} catch (IOException e) {
Log.e(TAG, e.getMessage());
return;
}
}
}
public static native void startRecording();
public static native boolean createAudioRecorder();
public static native byte[] readAudio(int millis);
static {
System.loadLibrary("SoundUtils");
}}
而且thisone的AudioThread
public class AudioThread implements Runnable{
private DatagramSocket audioServSock;
@Override
public void run() {
createBufferQueueAudioPlayer();
DatagramPacket packet = null;
Thread audioSndThread = null;
try {
this.audioServSock = new DatagramSocket(PORT.AUDIO);
} catch (SocketException e1) {
e1.printStackTrace();
}
if(true){
audioSndThread = new Thread(new AudioSendThread(this.audioServSock));
audioSndThread.start();
}
byte[] buffer = new buffer[1500]; //random size
packet = new DatagramPacket(buffer, 1500);
while(true){
try {
audioServSock.receive(packet);
playAudio(buffer, packet.getLength()); //other method i would like to implement in OpenSL
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
return;
}
}
at.stop();
at.release();
}
public static native void createBufferQueueAudioPlayer();
public static native void playAudio(byte[] buffer, int length);
/** Load jni .so on initialization */
static {
System.loadLibrary("native-audio-jni");
}
}
其他本地方法是採取NDK
致謝NativeAudio樣品全部對於任何建議!
Android NDK包含一個名爲'native-audio'的示例應用程序,該應用程序演示瞭如何使用OpenSL ES進行記錄和回放。 – Michael
我知道這一點,我試圖使用這個例子,但播放不工作..只有MP3重現它的工作。 – Oxenarf
下面是Android上低延遲流媒體的最終文章:http://createdigitalmusic.com/2013/05/why-mobile-low-latency-is-hard-explained-by-google-galaxy-nexus-still-android -of-choice/ –