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📜  vlcj-叠加

📅  最后修改于: 2020-10-14 09:03:23             🧑  作者: Mango

让我们进一步增强应用程序，在其中将通过覆盖支持更新vlcj-音频均衡器一章。

创建叠加层

我们可以创建一个叠加层作为要在视频上显示的旋转窗口。

class Overlay extends Window {
   public Overlay(Window owner) {
      super(owner, WindowUtils.getAlphaCompatibleGraphicsConfiguration());
      setBackground(new Color(0, 0, 0, 0));
   }
   @Override
   public void paint(Graphics g) {
      super.paint(g);
   }
}

创建并设置叠加层

以下代码设置媒体的叠加层。

Overlay overlay = new Overlay(this); 
mediaPlayerComponent.mediaPlayer().overlay().set(overlay);

按需启用/禁用覆盖。

mediaPlayerComponent.mediaPlayer().overlay().enable(overlayEnabled);

例

打开在Eclipse的“环境设置”一章中创建的项目mediaPlayer。

使用以下代码更新App.java-

App.java

package com.tutorialspoint.media;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Window;
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 com.sun.jna.platform.WindowUtils;
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 final Overlay overlay;
   private boolean overlayEnabled = false;
   private JButton playButton;
   private JButton pauseButton;
   private JButton rewindButton;
   private JButton skipButton;
   private JButton playAudioButton;
   private JButton pauseAudioButton;
   private JToggleButton toggleButton;
   private JButton equalizerButton;
   private JToggleButton overlayButton;

   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 videoTracks = mediaPlayer.video().trackDescriptions();
               System.out.println(videoTracks.get(1));
   
               List titles = mediaPlayer.titles().titleDescriptions();
               if(!titles.isEmpty()) {
                  System.out.println(titles.get(0));  
               }
               List 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 presetNames = mediaPlayerComponent.mediaPlayerFactory().equalizer().presets();
      System.out.println(presetNames);
      equalizer =  mediaPlayerComponent.mediaPlayerFactory().equalizer().newEqualizer("Dance");
      overlay = new Overlay(this); 
      mediaPlayerComponent.mediaPlayer().overlay().set(overlay);
   }
   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");
      overlayButton = new JToggleButton("Toggle Overlay");
      othersPane.add(toggleButton);
      othersPane.add(equalizerButton);
      othersPane.add(overlayButton);

      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);
         }
      });
      overlayButton.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) {
            overlayEnabled = !overlayEnabled;
            mediaPlayerComponent.mediaPlayer().overlay().enable(overlayEnabled);
         }
      });
      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);
   }
}
class Overlay extends Window {
   public Overlay(Window owner) {
      super(owner, WindowUtils.getAlphaCompatibleGraphicsConfiguration());
      setBackground(new Color(0, 0, 0, 0));
   }
   @Override
   public void paint(Graphics g) {
      super.paint(g);
      Graphics2D g2 = (Graphics2D)g;
      g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      GradientPaint gp = new GradientPaint(
         180.0f, 280.0f,
         new Color(255, 255, 255, 255),
         250.0f,
         380.0f,
         new Color(255, 255, 0, 0)
      );
      g2.setPaint(gp);
      g2.setFont(new Font("Serif", Font.PLAIN,32));
      g2.drawString("TutorialsPoint",200, 200); 
   }
}

通过右键单击文件来运行应用程序，然后选择以Java应用程序运行。成功启动后，如果一切正常，则应显示以下结果-

覆盖

现在，单击切换覆盖按钮，然后按如下所示在视频上查看覆盖文本。

重叠文字