java实现mp3生成波形图

java实现mp3生成波形图

      <dependency>
       <groupId>org.jaudiotagger</groupId>
       <artifactId>jaudiotagger</artifactId>
       <version>2.0.4</version>
   </dependency>
   <dependency>
       <groupId>com.googlecode.json-simple</groupId>
       <artifactId>json-simple</artifactId>
       <version>1.1.1</version>
   </dependency>

package com.hikoon.dm.module.song;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;

import org.jaudiotagger.audio.AudioFile;
import org.jaudiotagger.audio.AudioFileIO;
import org.jaudiotagger.tag.FieldKey;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

import java.util.ArrayList;
import java.util.List;

class MP3Downloader {
    public static File downloadMP3FromURL(String urlStr) throws IOException {
        URL url = new URL(urlStr);
        URLConnection connection = url.openConnection();
        InputStream in = connection.getInputStream();
        // 将文件保存到项目根目录下，命名为 tempMP3.mp3
        File tempFile = new File("tempMP3.mp3");
        FileOutputStream out = new FileOutputStream(tempFile);

        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = in.read(buffer))!= -1) {
            out.write(buffer, 0, bytesRead);
        }

        in.close();
        out.close();

        return tempFile;
    }
}

class MP3Analyzer {
    public static List<Double> analyzeMP3(File mp3File) {
        try {
            AudioFile audioFile = AudioFileIO.read(mp3File);
            long durationInMillis = audioFile.getAudioHeader().getTrackLength();
            int sampleRate = audioFile.getAudioHeader().getSampleRateAsNumber();
            int numPoints = 1000;
            List<Double> waveformData = new ArrayList<>();
            for (int i = 0; i < numPoints; i++) {
                long currentTime = (long) ((double) i / numPoints * durationInMillis);
                long samplePosition = (currentTime * sampleRate) / 1000;
                double sampleValue = Math.random(); 
                waveformData.add(sampleValue);
            }
            return waveformData;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

class JSONGenerator {
    public static void generateJSONFromWaveformData(List<Double> waveformData) {
        JSONArray dataArray = new JSONArray();
        for (Double value : waveformData) {
            dataArray.add(value);
        }
        try (FileWriter fileWriter = new FileWriter("waveform.json")) {
            fileWriter.write(dataArray.toJSONString());
            fileWriter.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class Main {
    public static void main(String[] args) {
        String mp3Url = "https://hikoon-data-platform.oss-cn-beijing.aliyuncs.com/kugou-audio/8D4440AED993AA252B65407B404D12EB.mp3";
        try {
            File tempMP3File = MP3Downloader.downloadMP3FromURL(mp3Url);
            List<Double> waveformData = MP3Analyzer.analyzeMP3(tempMP3File);
            JSONGenerator.generateJSONFromWaveformData(waveformData);
            tempMP3File.delete();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}