如何在不使用java中的「剪輯」之前循環播放聲音

Question

首先，感謝大家幫助我解決以前的問題。

在下面的代碼中，我選擇兩個頻率並將它們寫入.wav格式，以在用戶給定的特定時間在Windows Media Player中運行它。 我想要的是瞭解如何循環這些頻率在指定時間內交替運行，如救護車的警笛聲，並且在我的程序中，兩個頻率都只播放一次。例如，如果我將時間指定爲10秒，那麼兩個頻率一次運行5秒。但我想要的是第一個頻率運行一兩秒鐘（如用戶指定），然後是第二個頻率運行相似的秒，然後再運行第一個頻率，它應該繼續運行直到指定的時間。

import java.io.ByteArrayInputStream; 
import java.io.File; 
import java.io.IOException; 
import java.util.Scanner; 
import javax.sound.sampled.AudioFileFormat; 
import javax.sound.sampled.AudioFormat; 
import javax.sound.sampled.AudioInputStream; 
import javax.sound.sampled.AudioSystem; 
import javax.sound.sampled.LineUnavailableException; 

public class AudioWrite2New { 

    public static void main(String[] args) throws IOException, InterruptedException, LineUnavailableException { 

     Scanner in = new Scanner(System.in); 
     final double SAMPLING_RATE = 44100;    // Audio sampling rate 
     int time = in.nextInt();      //Time specified by user in seconds 
//  int time2 = in.nextByte(); 
     int frequency1 = in.nextInt();     //Frequency1 specified by the user in hz 
     int frequency2 = in.nextInt();     //Frequency2 specified by the user in hz 

     float buffer[] = new float[(int) (time/2 * SAMPLING_RATE)]; //Size of buffer[], which in case of 10 seconds is 441000 
     float buffer1[] = new float[(int) (time/2 * SAMPLING_RATE)]; //Size of buffer1[], which in case of 10 seconds is 441000 

     for (int sample = 0; sample < buffer.length; sample++) { 
      double cycle = sample/SAMPLING_RATE;     //Fraction of cycle between samples 
      buffer[sample] = (float) (Math.sin(2 * Math.PI * frequency1 * cycle)); 
      //buffer1[sample] = (float) (Math.sin(2 * Math.PI * frequency2 * cycle)); 
     } 
     for (int sample = 0; sample < buffer1.length; sample++) { 
      double cycle = sample/SAMPLING_RATE;     //Fraction of cycle between samples 
      //buffer[sample] = (float) (Math.sin(2 * Math.PI * frequency1 * cycle)); 
      buffer1[sample] = (float) (Math.sin(2 * Math.PI * frequency2 * cycle)); 
     } 
     //System.out.println(buffer[1]); 
     byte byteBuffer[] = new byte[buffer.length * 2];   //Size of byteBuffer, in this case 882000 
     byte byteBuffer1[] = new byte[buffer1.length * 2];   //Size of byteBuffer, in this case 882000 

     int count = 0; 
     for (int i = 0; i < byteBuffer.length; i++) { 
      final int x = (int) (buffer[count++] * Short.MAX_VALUE); 
      byteBuffer[i++] = (byte) x; 
      byteBuffer[i] = (byte) (x/256); 
     } 

     count = 0; 
     for (int i = 0; i < byteBuffer1.length; i++) { 
      final int x = (int) (buffer1[count++] * Short.MAX_VALUE); 
      byteBuffer1[i++] = (byte) x; 
      byteBuffer1[i] = (byte) (x/256); 
     } 

     //For merging the two frequencies 
     byte[] merge = new byte[byteBuffer.length + byteBuffer1.length]; 
     System.arraycopy(byteBuffer, 0, merge, 0, byteBuffer.length); 
     System.arraycopy(byteBuffer1, 0, merge, byteBuffer.length, byteBuffer1.length); 

     File out = new File("E:/RecordAudio17.wav"); //The path where user want the file data to be written 

     //Construct an audio format, using 44100hz sampling rate, 16 bit samples, mono, and big 
     // endian byte ordering 
     AudioFormat format = new AudioFormat((float) SAMPLING_RATE, 16, 1, true, false); 

     // It uses bytebuffer as its buffer array that contains bytes that may be read from the stream. 
     ByteArrayInputStream bais = new ByteArrayInputStream(merge); 

     //Constructs an audio input stream that has the requested format and length in sample frames, using audio data 
     //from the specified input stream. 
     AudioInputStream audioInputStream = new AudioInputStream(bais, format, buffer1.length + buffer.length); 

     //Writes a stream of bytes representing an audio file of the specified file type to the external file provided. 
     AudioSystem.write(audioInputStream, AudioFileFormat.Type.WAVE, out); 

     audioInputStream.close();  //Closes this audio input stream 
    } 
} 

正如我在Java和JavaSounds挺新的，所以有時我會問一些愚蠢的或不相關的問題。所以請耐心等待，因爲這是我學習的唯一途徑。 謝謝。

Answer 1

我解決了它。儘管我需要處理一小部分內容。我會盡快更新它。

import java.io.ByteArrayInputStream; 
import java.io.File; 
import java.io.IOException; 
import java.util.Scanner; 
import javax.sound.sampled.AudioFileFormat; 
import javax.sound.sampled.AudioFormat; 
import javax.sound.sampled.AudioInputStream; 
import javax.sound.sampled.AudioSystem; 
import javax.sound.sampled.LineUnavailableException; 

public class AudioWrite2New { 

    public static void main(String[] args) throws IOException, InterruptedException, LineUnavailableException { 

     Scanner in = new Scanner(System.in); 
     final double SAMPLING_RATE = 44100;    // Audio sampling rate 
     int time = in.nextInt();      //Time specified by user in milliseconds 
     int time2 = in.nextByte(); 
     int frequency1 = in.nextInt();     //Frequency1 specified by the user in hz 
     int frequency2 = in.nextInt();     //Frequency2 specified by the user in hz 

     float buffer[] = new float[((int) (time * SAMPLING_RATE))/1000]; //Size of buffer[], which in case of 10 seconds is 441000 
     float buffer1[] = new float[((int) (time * SAMPLING_RATE))/1000]; //Size of buffer1[], which in case of 10 seconds is 441000 

     //for (int a = 1; a <= time2/2; a++) { 
     for (int sample = 0; sample < buffer.length; sample++) { 
      double cycle = sample/SAMPLING_RATE;     //Fraction of cycle between samples 
      buffer[sample] = (float) (Math.sin(2 * Math.PI * frequency1 * cycle)); 
      //buffer1[sample] = (float) (Math.sin(2 * Math.PI * frequency2 * cycle)); 
     } 
     for (int sample = 0; sample < buffer1.length; sample++) { 
      double cycle = sample/SAMPLING_RATE;     //Fraction of cycle between samples 
      //buffer[sample] = (float) (Math.sin(2 * Math.PI * frequency1 * cycle)); 
      buffer1[sample] = (float) (Math.sin(2 * Math.PI * frequency2 * cycle)); 
     } 
     //System.out.println(buffer[1]); 
     byte byteBuffer[] = new byte[buffer.length * 2];   //Size of byteBuffer, in this case 882000 
     byte byteBuffer1[] = new byte[buffer1.length * 2];   //Size of byteBuffer, in this case 882000 

     int count = 0; 
     for (int i = 0; i < byteBuffer.length; i++) { 
      final int x = (int) (buffer[count++] * Short.MAX_VALUE); 
      byteBuffer[i++] = (byte) x; 
      byteBuffer[i] = (byte) (x/256); 
     } 

     count = 0; 
     for (int i = 0; i < byteBuffer1.length; i++) { 
      final int x = (int) (buffer1[count++] * Short.MAX_VALUE); 
      byteBuffer1[i++] = (byte) x; 
      byteBuffer1[i] = (byte) (x/256); 
     } 

     int iterations = (1000*time2)/(2*time); 
     byte[] merge = new byte[iterations*(byteBuffer.length + byteBuffer1.length)]; 
     for (int i = 0; i<iterations; i++) 
     { 
      //arraycopy(Object src, int srcPos, Object dest, int destPos, int length) 
      //For merging the two frequencies 
      System.arraycopy(byteBuffer, 0, merge, 0+i*(byteBuffer.length + byteBuffer1.length), byteBuffer.length); 
      System.arraycopy(byteBuffer1, 0, merge, byteBuffer.length+i*(byteBuffer.length + byteBuffer1.length), byteBuffer1.length); 
     } 

     File out = new File("E:/RecordAudio17.wav"); //The path where user want the file data to be written 

     //Construct an audio format, using 44100hz sampling rate, 16 bit samples, mono, and big 
     // endian byte ordering 
     AudioFormat format = new AudioFormat((float) SAMPLING_RATE, 16, 1, true, false); 

     // It uses bytebuffer as its buffer array that contains bytes that may be read from the stream. 
     ByteArrayInputStream bais = new ByteArrayInputStream(merge); 

     //Constructs an audio input stream that has the requested format and length in sample frames, using audio data 
     //from the specified input stream. 
     AudioInputStream audioInputStream = new AudioInputStream(bais, format, (buffer1.length + buffer.length) * (time2/4)); 

     //Writes a stream of bytes representing an audio file of the specified file type to the external file provided. 
     AudioSystem.write(audioInputStream, AudioFileFormat.Type.WAVE, out); 

     //} 
     //audioInputStream.close();  //Closes this audio input stream 
    } 
}