vlcj - Bộ cân bằng âm thanh

Hãy nâng cao ứng dụng hơn nữa, trong đó chúng tôi sẽ cập nhật chương vlcj - Full Screen Video với hỗ trợ bộ cân bằng âm thanh.

Tạo bộ cân bằng âm thanh

Chúng ta có thể tạo bộ cân bằng với tất cả các giá trị là số 0 bằng cách sử dụng phiên bản MediaPlayerFactory.

Equalizer equalizer = mediaPlayerComponent.mediaPlayerFactory().equalizer().newEqualizer();

Nhận các giá trị bộ cân bằng đặt trước

Mã sau lấy tên bộ cân bằng đặt trước, ví dụ như Phẳng, Cổ điển, Câu lạc bộ, Khiêu vũ, Tai nghe, v.v.

List<String> presetNames = factory.equalizer().presets();

Sử dụng bộ cân bằng cài đặt trước.

Equalizer equalizer = mediaPlayerComponent.mediaPlayerFactory().equalizer().newEqualizer(presetName);

Thí dụ

Mở mediaPlayer của dự án như đã tạo trong chương Thiết lập môi trường trong Eclipse.

Cập nhật App.java bằng mã sau−

App.java

package com.tutorialspoint.media;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.border.Border;
import uk.co.caprica.vlcj.media.Media;
import uk.co.caprica.vlcj.media.MediaEventAdapter;
import uk.co.caprica.vlcj.media.MediaParsedStatus;
import uk.co.caprica.vlcj.media.TrackInfo;
import uk.co.caprica.vlcj.player.base.ChapterDescription;
import uk.co.caprica.vlcj.player.base.Equalizer;
import uk.co.caprica.vlcj.player.base.Logo;
import uk.co.caprica.vlcj.player.base.LogoPosition;
import uk.co.caprica.vlcj.player.base.Marquee;
import uk.co.caprica.vlcj.player.base.MarqueePosition;
import uk.co.caprica.vlcj.player.base.MediaPlayer;
import uk.co.caprica.vlcj.player.base.MediaPlayerEventAdapter;
import uk.co.caprica.vlcj.player.base.TitleDescription;
import uk.co.caprica.vlcj.player.base.TrackDescription;
import uk.co.caprica.vlcj.player.component.AudioPlayerComponent;
import uk.co.caprica.vlcj.player.component.EmbeddedMediaPlayerComponent;
import uk.co.caprica.vlcj.player.embedded.fullscreen.adaptive.AdaptiveFullScreenStrategy;

public class App extends JFrame {
   private static final long serialVersionUID = 1L;
   private static final String TITLE = "My First Media Player";
   private static final String VIDEO_PATH = "D:\\Downloads\\sunset-beach.mp4";
   private static final String AUDIO_PATH = "D:\\Downloads\\time-to-feel-good.mp3";
   private static final String LOGO_PATH = "D:\\Downloads\\logo.png";
   private final EmbeddedMediaPlayerComponent mediaPlayerComponent;
   private final AudioPlayerComponent audioPlayerComponent;
   private final Marquee marquee;
   private final Logo logo;
   private final Equalizer equalizer;
   private JButton playButton;
   private JButton pauseButton;
   private JButton rewindButton;
   private JButton skipButton;
   private JButton playAudioButton;
   private JButton pauseAudioButton;
   private JToggleButton toggleButton;
   private JButton equalizerButton;

   public App(String title) {
      super(title);
      mediaPlayerComponent = new EmbeddedMediaPlayerComponent() {
         @Override
         public void mouseClicked(MouseEvent e) {
            super.mouseClicked(e);
            System.out.println("Mouse Clicked. (" + e.getX() + "," + e.getY() + ")");
         }
         @Override
         public void mouseWheelMoved(MouseWheelEvent e) {
            super.mouseWheelMoved(e);
            System.out.println("Mouse wheel moved. " + e.getScrollAmount());
         } 
         @Override
         public void keyPressed(KeyEvent e) {
            super.keyPressed(e);
            System.out.println("Key pressed. " + e.getKeyCode());
         }
         @Override
         public void playing(MediaPlayer mediaPlayer) {
            super.playing(mediaPlayer);
            System.out.println("Media Playback started.");
         }
         @Override
         public void finished(MediaPlayer mediaPlayer) {
            super.playing(mediaPlayer);
            System.out.println("Media Playback finished.");
         }
         @Override
         public void error(MediaPlayer mediaPlayer) {
            SwingUtilities.invokeLater(new Runnable() {        		
               public void run() {
                  System.out.println("Failed to load Media.");
               }        	       
            });
         }
      };
      audioPlayerComponent = new AudioPlayerComponent();
      audioPlayerComponent.mediaPlayer().events().addMediaPlayerEventListener(new MediaPlayerEventAdapter() {
         @Override
         public void finished(MediaPlayer mediaPlayer) {
            System.out.println("Audio Playback Finished.");
         }
         @Override
         public void error(MediaPlayer mediaPlayer) {
            System.out.println("Failed to load Audio.");
         }
      });
      marquee = Marquee.marquee()
         .text("TutorialsPoint")
         .size(40)
         .colour(Color.WHITE)    		    
         .position(MarqueePosition.BOTTOM_RIGHT)
         .opacity(0.5f)
         .enable();
      mediaPlayerComponent.mediaPlayer().marquee().set(marquee);
      logo = Logo.logo()
         .file(LOGO_PATH)
         .position(LogoPosition.TOP_LEFT)
         .opacity(0.3f)
         .enable();
      mediaPlayerComponent.mediaPlayer().logo().set(logo);
      mediaPlayerComponent.mediaPlayer().events().addMediaEventListener(new MediaEventAdapter() {
         @Override
         public void mediaParsedChanged(Media media,
            MediaParsedStatus newStatus) {
            if(newStatus == MediaParsedStatus.DONE) {
               MediaPlayer mediaPlayer = mediaPlayerComponent.mediaPlayer();

               List<TrackDescription> videoTracks = mediaPlayer.video().trackDescriptions();
               System.out.println(videoTracks.get(1));
   
               List<TitleDescription> titles = mediaPlayer.titles().titleDescriptions();
               if(!titles.isEmpty()) {
                  System.out.println(titles.get(0));  
               }
               List<ChapterDescription> chapters = mediaPlayer.chapters().descriptions();
               if(!chapters.isEmpty()) {
                  System.out.println(chapters.get(0));  
               }
               List<? extends TrackInfo> trackInfo = mediaPlayer.media().info().tracks();
               if(!trackInfo.isEmpty()) {
                  System.out.println(trackInfo.get(0));  
               }    			  
            }
         }
      });
      mediaPlayerComponent.mediaPlayer().fullScreen().strategy(new AdaptiveFullScreenStrategy(this));

      List<String> presetNames = mediaPlayerComponent.mediaPlayerFactory().equalizer().presets();
      System.out.println(presetNames);
      equalizer =  mediaPlayerComponent.mediaPlayerFactory().equalizer().newEqualizer("Dance");
   }
   public void initialize() {
      this.setBounds(100, 100, 600, 400);
      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      this.addWindowListener(new WindowAdapter() {
         @Override
         public void windowClosing(WindowEvent e) {
            mediaPlayerComponent.release();
            System.exit(0);
         }
      });    	
      JPanel contentPane = new JPanel();
      contentPane.setLayout(new BorderLayout());   	 
      contentPane.add(mediaPlayerComponent, BorderLayout.CENTER);

      //Create a video border
      Border videoBorder = BorderFactory.createTitledBorder("Video Controls");

      //Create an audio border
      Border audioBorder = BorderFactory.createTitledBorder("Audio Controls");

      //Create others border
      Border othersBorder = BorderFactory.createTitledBorder("Others");

      JPanel videoControlsPane = new JPanel(); 
      videoControlsPane.setBorder(videoBorder);
      playButton = new JButton("Play");
      videoControlsPane.add(playButton);    
      pauseButton = new JButton("Pause");
      videoControlsPane.add(pauseButton);
      rewindButton = new JButton("Rewind");
      videoControlsPane.add(rewindButton);
      skipButton = new JButton("Skip");
      videoControlsPane.add(skipButton);

      JPanel audioControlsPane = new JPanel(); 
      audioControlsPane.setBorder(audioBorder);
      playAudioButton = new JButton("Play");
      audioControlsPane.add(playAudioButton);  
      pauseAudioButton = new JButton("Pause");
      audioControlsPane.add(pauseAudioButton);

      JPanel othersPane = new JPanel(); 
      othersPane.setBorder(othersBorder);
      toggleButton = new JToggleButton("Toggle Full Screen");
      equalizerButton = new JButton("Equalizer");
      othersPane.add(toggleButton);
      othersPane.add(equalizerButton);

      JPanel controlsPane = new JPanel();      
      controlsPane.add(videoControlsPane);
      controlsPane.add(audioControlsPane);
      controlsPane.add(othersPane);
      controlsPane.setPreferredSize(new Dimension(400, 120));
      contentPane.add(controlsPane, BorderLayout.SOUTH);

      playButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().play();
         }
      });  
      pauseButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().pause();
         }
      });
      rewindButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().skipTime(-14000);
         }
      });
      skipButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().controls().skipTime(4000);
         }
      });
      playAudioButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            audioPlayerComponent.mediaPlayer().controls().play();
         }
      });
      pauseAudioButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            audioPlayerComponent.mediaPlayer().controls().pause();
         }
      });
      toggleButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().fullScreen().toggle();
         }
      });
      equalizerButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            mediaPlayerComponent.mediaPlayer().audio().setEqualizer(equalizer);
            System.out.println("Using equalizer: " + equalizer);
         }
      });
      this.setContentPane(contentPane);
      this.setVisible(true);
   }
   public void loadVideo(String path) {
      mediaPlayerComponent.mediaPlayer().media().startPaused(path);
      mediaPlayerComponent.mediaPlayer().media().parsing().parse();	  
   }
   public void loadAudio(String path) {
      audioPlayerComponent.mediaPlayer().media().startPaused(path);   	
   }
   public static void main( String[] args ){
      try {
         UIManager.setLookAndFeel(
         UIManager.getSystemLookAndFeelClassName());
      } 
      catch (Exception e) {
         System.out.println(e);
      }
      App application = new App(TITLE);
      application.initialize(); 
      application.setVisible(true);  
      application.loadVideo(VIDEO_PATH);
      application.loadAudio(AUDIO_PATH);
   }
}

Chạy ứng dụng bằng cách nhấp chuột phải vào tệp và chọn chạy dưới dạng Ứng dụng Java. Sau khi khởi động thành công, nếu mọi thứ đều ổn thì nó sẽ hiển thị kết quả sau:

Bây giờ hãy nhấp vào nút Equalizer và xem chi tiết bộ chỉnh âm trong bảng điều khiển như sau.

[Flat, Classical, Club, Dance, Full bass, Full bass and treble, 
Full treble, Headphones, Large Hall, Live, Party, Pop, Reggae, 
Rock, Ska, Soft, Soft rock, Techno]
TrackDescription[id=0,description=Track 1]
VideoTrackInfo[codec=0x34363268,codecName=h264,originalCodec=0x31637661,
originalCodecName=avc1,id=0,profile=-1,level=-1,bitRate=0,language=null,
description=null,codecDescription=H264 - MPEG-4 AVC (part 10)]
[width=596,height=336,sampleAspectRatio=1,sampleAspectRatioBase=1,
frameRate=30000,frameRateBase=1001,orientation=TOP_LEFT,
projection=RECTANGULAR,yaw=0.0,pitch=0.0,roll=0.0,fov=80.0,multiview=null]
Media Playback started.
TrackDescription[id=0,description=Track 1]
VideoTrackInfo[codec=0x34363268,codecName=h264,originalCodec=0x31637661,
originalCodecName=avc1,id=0,profile=-1,level=-1,bitRate=0,language=null,
description=null,codecDescription=H264 - MPEG-4 AVC (part 10)]
[width=596,height=336,sampleAspectRatio=1,sampleAspectRatioBase=1,
frameRate=30000,frameRateBase=1001,orientation=TOP_LEFT,projection=RECTANGULAR,
yaw=0.0,pitch=0.0,roll=0.0,fov=80.0,multiview=null]
Using equalizer: Equalizer[preamp=5.0,bandAmps=[9.6, 7.2, 2.4, 
-1.11022E-15, -1.11022E-15, -5.6, -7.2, -7.2, -1.11022E-15, -1.11022E-15]]