Question

我试图创建一个有趣的应用程序，它将获取声音文件并对其进行修改，并创建一个新的声音文件。

我要做的一件事就是让声音文件的长度增加两倍。所以我基本上创建了一个新的数组{2,2,3,3,7,7,8,8}而不是原来的{2,3,7,8}。我正在使用双打，这只是一个例子

我希望原始数组（样本）现在引用我刚刚创建的数组的开始（temp），所以当文件保存它时，现在保存临时数组。

我可以增加或减少音乐文件的音量没问题，并保存它。我省略了部分代码，因为它与此无关。

如果有人能够帮助我，我也想知道其背后的原因

public class Sound {

double[] samples;
    //So we only have to declare it once. Reference to an array

public Sound() {
    //This constructor should initialize the samples array to be empty

    samples = new double[0];
        //Initialize an array with nothing because we will be using that to reference the    
        //location of other arrays

}

public void wavRead(String fileName) {

    samples = WavIO.read(fileName);
        //Samples was an adress of an array we set to 0. Then we used WavIO to create an aray of doubles, now 
        //we tell samples to reference this new address over here. Samples has the addsss of the new array

}

public void wavSave(String fileName) {

    WavIO.write(fileName, samples);

}

    public void lengthen() {

     double[] temp = new double[(samples.length *2)];

      int t = 0;

     for(int i = 0; i < samples.length; i++) {


            //Set a variable to increase the temp array by

         temp[t] = samples[i];
            //Have position 0 of temp = position 0 of soundRaw

         t++;
            //Increase the position in the temp array by one

         temp[t] = samples[i];
            //Have position 1 of temp array = position 0 of soundRaw

     }

     samples[0] = temp;
        //Here is where I try and have the samples array reference the start of another array. I tried multiple things, this is simply the last effort I tried

}

这是我用来测试代码的应用程序

公共类App {

public static void main(String[] args) {

    Sound s = new Sound();
        //We are now calling the other code

    s.wavRead("bye8");
        //If you want to mess with your own .wav file, replace this name

    s.lengthen();

    s.wavSave("bye8New");

}

}

Answer 1

使用DoubleBuffer，可以更轻松地完成您想要实现的目标。

要创建一个新的DoubleBuffer，它是...... Double ...大小和重复，您将会这样做：

// Important!
origBuf.rewind();

final DoubleBuffer newBuf = DoubleBuffer.allocate(origBuf.remaining() * 2);

double value;

while (origBuf.hasRemaining()) {
    value = origBuf.get();
    newBuf.put(value).put(value);
}

然后newBuf.array()将返回带有重复项的double[]数组“。

另请注意，DoubleBuffer与任何XBuffer一样，允许您设置字节顺序。

Answer 2

替换此代码行

  samples[0] = temp;

只是

 samples = temp;

就够了！：）

Answer 3

只需使用samples=temp;代替samples[0] = temp;！

Java：如何让一个数组引用另一个数组的开头？

3 个答案: