除了添加音频效果（延迟（回声），混响，...）之外，我还制作了一个关于实时音频录制的分支，并且我是音频编程世界的新手
我遇到了一些麻烦，如下所示
我得到了 joren 的库（be.tarsos.dsp）我想对我的应用程序应用延迟效果
在我从库中添加延迟效果的新行之前，它默认运行良好，但申请我很困难，所以我需要你的帮助
这是我想在下面应用延迟效果的主要活动
MainActivity.java
package com.example.makeechomike;
import android.app.Activity;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
public class MainActivity extends Activity {
private static final String MEDIA_ID = "88550";
private static final String PUBLISHER_ID = "26505";
private static final String SPOT_ID = "190377";
AudioManager am;
private AudioRecord audioRec;
private boolean bIsRecording;
private int bufSize;
private ImageView mike;
private boolean mikeActionFLG = true;
private AudioTrack track;
private SeekBar volSeekBar;
public void MikePlay() {
this.bufSize = (2 * AudioRecord.getMinBufferSize(44100, 2, 2));
this.audioRec = new AudioRecord(1, 44100, 2, 2, this.bufSize);
this.track = new AudioTrack(3, 44100, 2, 1, 44100, 1);
this.track.play();
this.audioRec.startRecording();
this.bIsRecording = true;
new Thread(new Runnable() {
public void run() {
byte[] arrayOfByte = new byte[MainActivity.this.bufSize];
for (;;) {
if (!MainActivity.this.bIsRecording) {
Log.v("AudioRecord", "stop");
MainActivity.this.audioRec.stop();
MainActivity.this.track.stop();
MainActivity.this.audioRec.release();
return;
}
MainActivity.this.audioRec.read(arrayOfByte, 0,
arrayOfByte.length);
Log.v("AudioRecord", "read " + arrayOfByte.length
+ " bytes");
MainActivity.this.track.write(arrayOfByte, 0,
arrayOfByte.length);
}
}
}).start();
}
public void MikeStop() {
this.track.stop();
this.audioRec.stop();
this.bIsRecording = false;
}
protected void onCreate(Bundle paramBundle) {
super.onCreate(paramBundle);
setContentView(R.layout.activity_main);
this.mike = ((ImageView) findViewById(R.id.mikeoff_imageView));
this.volSeekBar = ((SeekBar) findViewById(R.id.volume_seekBar));
this.am = ((AudioManager) getSystemService("audio"));
int i = this.am.getStreamMaxVolume(3);
this.volSeekBar.setMax(i);
int j = this.am.getStreamVolume(3);
this.am.setStreamVolume(1, j, 0);
this.volSeekBar.setProgress(j);
this.mike.setOnClickListener(new View.OnClickListener() {
public void onClick(View paramAnonymousView) {
if (MainActivity.this.mikeActionFLG) {
MainActivity.this.mike.setImageResource(R.drawable.mic_on);
MainActivity.this.mikeActionFLG = false;
MainActivity.this.MikePlay();
return;
} else {
MainActivity.this.mikeActionFLG = true;
MainActivity.this.mike.setImageResource(R.drawable.mic_off);
MainActivity.this.MikeStop();
return;
}
}
});
this.volSeekBar
.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
public void onProgressChanged(
SeekBar paramAnonymousSeekBar,
int paramAnonymousInt, boolean paramAnonymousBoolean) {
MainActivity.this.am.setStreamVolume(3,
paramAnonymousInt, 0);
}
public void onStartTrackingTouch(
SeekBar paramAnonymousSeekBar) {
}
public void onStopTrackingTouch(
SeekBar paramAnonymousSeekBar) {
}
});
}
protected void onDestroy() {
super.onDestroy();
}
public boolean onKeyDown(int paramInt, KeyEvent paramKeyEvent) {
if (paramInt == 4) {
Log.v("test", "뒤로 가기 버튼 누름");
return true;
}
return super.onKeyDown(paramInt, paramKeyEvent);
}
protected void onPause() {
super.onPause();
if (!this.mikeActionFLG) {
MikeStop();
}
finish();
}
}
==================================================== =========
这是名为 DelayEffect.java 的 Java 文件（来自 Joren 的 be.tarsos.dsp 库）
延迟效果.java
/*
* _______ _____ _____ _____
* |__ __| | __ \ / ____| __ \
* | | __ _ _ __ ___ ___ ___| | | | (___ | |__) |
* | |/ _` | '__/ __|/ _ \/ __| | | |\___ \| ___/
* | | (_| | | \__ \ (_) \__ \ |__| |____) | |
* |_|\__,_|_| |___/\___/|___/_____/|_____/|_|
*
* -------------------------------------------------------------
*
* TarsosDSP is developed by Joren Six at IPEM, University Ghent
*
* -------------------------------------------------------------
*
* Info: http://0110.be/tag/TarsosDSP
* Github: https://github.com/JorenSix/TarsosDSP
* Releases: http://0110.be/releases/TarsosDSP/
*
* TarsosDSP includes modified source code by various authors,
* for credits and info, see README.
*
*/
package be.tarsos.dsp.effects;
import be.tarsos.dsp.AudioEvent;
import be.tarsos.dsp.AudioProcessor;
/**
* <p>
* Adds an echo effect to the signal.
* </p>
*
* @author Joren Six
*/
public class DelayEffect implements AudioProcessor {
private double sampleRate;
private float[] echoBuffer;//in seconds
private int position;
private float decay;
private double newEchoLength;
/**
* @param echoLength in seconds
* @param sampleRate the sample rate in Hz.
* @param decay The decay of the echo, a value between 0 and 1. 1 meaning no decay, 0 means immediate decay (not echo effect).
*/
public DelayEffect(double echoLength,double decay,double sampleRate) {
this.sampleRate = sampleRate;
setDecay(decay);
setEchoLength(echoLength);
applyNewEchoLength();
}
/**
* @param newEchoLength A new echo buffer length in seconds.
*/
public void setEchoLength(double newEchoLength){
this.newEchoLength = newEchoLength;
}
private void applyNewEchoLength(){
if(newEchoLength != -1){
//create a new buffer with the information of the previous buffer
float[] newEchoBuffer = new float[(int) (sampleRate * newEchoLength)];
if(echoBuffer != null){
for(int i = 0 ; i < newEchoBuffer.length; i++){
if(position >= echoBuffer.length){
position = 0;
}
newEchoBuffer[i] = echoBuffer[position];
position++;
}
}
this.echoBuffer = newEchoBuffer;
newEchoLength = -1;
}
}
/**
* A decay, should be a value between zero and one.
* @param newDecay the new decay (preferably between zero and one).
*/
public void setDecay(double newDecay){
this.decay = (float) newDecay;
}
@Override
public boolean process(AudioEvent audioEvent) {
float[] audioFloatBuffer = audioEvent.getFloatBuffer();
int overlap = audioEvent.getOverlap();
for(int i = overlap ; i < audioFloatBuffer.length ; i++){
if(position >= echoBuffer.length){
position = 0;
}
//output is the input added with the decayed echo
audioFloatBuffer[i] = audioFloatBuffer[i] + echoBuffer[position] * decay;
//store the sample in the buffer;
echoBuffer[position] = audioFloatBuffer[i];
position++;
}
applyNewEchoLength();
return true;
}
@Override
public void processingFinished() {
}
}
q1)我想知道该库是否可以应用于 Android 应用程序是否可能？
q2)我如何更改要从 DelayEffect.Java 应用的 MainActivity？