用java写一个音频加载脉冲的算法

以下是使用Java编写的加载音频脉冲的示例代码：

import java.io.File;
import java.io.IOException;

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;
import javax.sound.sampled.TargetDataLine;

public class AudioPulseLoader {

    private static final int SAMPLE_RATE = 44100; // 采样率
    private static final int SAMPLE_SIZE_IN_BITS = 16; // 采样位数
    private static final int CHANNELS = 1; // 声道数
    private static final boolean SIGNED = true; // 是否有符号
    private static final boolean BIG_ENDIAN = true; // 是否大端序

    private TargetDataLine line;
    private AudioInputStream audioInputStream;

    public void start() throws LineUnavailableException {
        AudioFormat format = new AudioFormat(SAMPLE_RATE, SAMPLE_SIZE_IN_BITS, CHANNELS, SIGNED, BIG_ENDIAN);
        DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
        if (!AudioSystem.isLineSupported(info)) {
            throw new LineUnavailableException("Line not supported");
        }
        line = (TargetDataLine) AudioSystem.getLine(info);
        line.open(format);
        line.start();

        audioInputStream = new AudioInputStream(line);
    }

    public void stop() throws IOException {
        line.stop();
        line.close();
        audioInputStream.close();
    }

    public double[] loadPulse(File audioFile) throws IOException {
        AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(audioFile);
        AudioFormat format = fileFormat.getFormat();

        int sampleSizeInBytes = format.getSampleSizeInBits() / 8;
        int frameSize = format.getFrameSize();
        int bufferSize = (int) (fileFormat.getFrameLength() * frameSize);

        byte[] buffer = new byte[bufferSize];
        audioInputStream.read(buffer);

        double[] pulse = new double[bufferSize / sampleSizeInBytes];

        for (int i = 0, j = 0; i < buffer.length; i += sampleSizeInBytes, j++) {
            double sample = 0;
            for (int k = 0; k < sampleSizeInBytes; k++) {
                int shift = (BIG_ENDIAN ? sampleSizeInBytes - 1 - k : k) * 8;
                int value = (buffer[i + k] & 0xFF) << shift;
                sample += value / (double) (1L << (sampleSizeInBytes * 8 - 1));
            }
            pulse[j] = sample;
        }

        return pulse;
    }

    public static void main(String[] args) throws IOException, LineUnavailableException {
        AudioPulseLoader loader = new AudioPulseLoader();
        loader.start();

        File audioFile = new File("audio.wav");
        double[] pulse = loader.loadPulse(audioFile);

        // 播放脉冲
        for (double sample : pulse) {
            System.out.println(sample);
        }

        loader.stop();
    }

}

该示例代码创建了一个名为`AudioPulseLoader`的类，其中包含了开始、停止和加载音频脉冲的方法。

首先，在`start`方法中，我们使用`javax.sound.sampled`类库打开了一个音频输入流。接着，在`stop`方法中，我们关闭了此音频输入流。最后，在`loadPulse`方法中，我们从音频文件中读取音频数据，并将其转换为一个双精度浮点数数组，以便于我们处理音频数据。

在`main`方法中，我们创建了一个`AudioPulseLoader`对象，并使用该对象加载了一个名为`audio.wav`的音频文件。最后，我们使用一个循环遍历脉冲数组并打印每个样本的值。