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VirtualCamera类实现了虚拟摄像头核心功能,包括生成测试图像帧和处理帧数据 支持可配置的分辨率和帧率参数 提供start()和stop()方法控制摄像头运行状态 生成彩色测试图案和简单图形作为视频内容 VirtualCameraDriver类提供简单的命令行界面控制摄像头 pom.xml配置了Maven项目结构和打包参数 项目可以打包成可执行JAR文件运行
import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Random;
public class VirtualCamera { private int width; private int height; private int fps; private boolean isRunning; private Thread captureThread; private Random random = new Random();
public VirtualCamera(int width, int height, int fps) {
this.width = width;
this.height = height;
this.fps = fps;
}
public void start() {
if (isRunning) return;
isRunning = true;
captureThread = new Thread(this::captureLoop);
captureThread.start();
System.out.println("Virtual camera started at " + width + "x" + height + " " + fps + "fps");
}
public void stop() {
isRunning = false;
try {
if (captureThread != null) {
captureThread.join();
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
System.out.println("Virtual camera stopped");
}
private void captureLoop() {
long frameInterval = 1000 / fps;
long nextFrameTime = System.currentTimeMillis();
while (isRunning) {
long currentTime = System.currentTimeMillis();
if (currentTime < nextFrameTime) {
try {
Thread.sleep(nextFrameTime - currentTime);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
BufferedImage frame = generateFrame();
processFrame(frame);
nextFrameTime += frameInterval;
}
}
private BufferedImage generateFrame() {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g2d = image.createGraphics();
// Generate random pattern
g2d.setColor(new Color(random.nextInt(256), random.nextInt(256), random.nextInt(256)));
g2d.fillRect(0, 0, width, height);
// Draw some shapes
g2d.setColor(Color.WHITE);
g2d.drawOval(10, 10, width-20, height-20);
g2d.drawString("Virtual Camera", width/2-50, height/2);
g2d.dispose();
return image;
}
private void processFrame(BufferedImage frame) {
try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
ImageIO.write(frame, "jpg", baos);
byte[] frameData = baos.toByteArray();
// Here you would normally send the frame to a virtual device
System.out.println("Frame generated: " + frameData.length + " bytes");
} catch (IOException e) {
e.printStackTrace();
}
}
}
import java.util.Scanner;
public class VirtualCameraDriver { public static void main(String[] args) { VirtualCamera camera = new VirtualCamera(640, 480, 30); Scanner scanner = new Scanner(System.in);
System.out.println("Virtual Camera Simulator");
System.out.println("Commands: start, stop, exit");
while (true) {
System.out.print("> ");
String command = scanner.nextLine().trim().toLowerCase();
switch (command) {
case "start":
camera.start();
break;
case "stop":
camera.stop();
break;
case "exit":
camera.stop();
System.out.println("Exiting...");
scanner.close();
System.exit(0);
break;
default:
System.out.println("Unknown command");
}
}
}
}
4.0.0
<groupId>com.example</groupId>
<artifactId>virtual-camera</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<archive>
<manifest>
<mainClass>VirtualCameraDriver</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<mainClass>VirtualCameraDriver</mainClass>
</configuration>
</plugin>
</plugins>
</build>