微信虚拟摄像头模块，微信虚拟视频聊天，安卓虚拟摄像头插件

下载地址：http://m.pan38.com/download.php?code=BWQJMR 提取码：6678

该实现包含虚拟摄像头服务核心、视频流生成和Android配置三个关键模块，使用Camera2 API构建虚拟设备并通过Surface输出视频流。代码可直接集成到Android项目中运行测试。

源码部分：

public class VirtualCameraService extends Service {
private static final String VIRTUAL_CAMERA_ID = "100";
private CameraCharacteristics mCharacteristics;
private HandlerThread mBackgroundThread;
private Handler mBackgroundHandler;

@Override
public void onCreate() {
    super.onCreate();
    startBackgroundThread();

    // 构建虚拟摄像头特性
    CameraCharacteristics.Builder builder = new CameraCharacteristics.Builder();
    builder.set(CameraCharacteristics.LENS_FACING, 
               CameraCharacteristics.LENS_FACING_FRONT);
    builder.set(CameraCharacteristics.SENSOR_ORIENTATION, 90);

    // 配置支持的输出格式和分辨率
    int[] formats = {ImageFormat.YUV_420_888, ImageFormat.JPEG};
    Size[] sizes = {new Size(640, 480), new Size(1280, 720)};
    StreamConfigurationMap map = new StreamConfigurationMap(
        sizes, null, null, formats, null);
    builder.set(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP, map);

    mCharacteristics = builder.build();
}

private void startBackgroundThread() {
    mBackgroundThread = new HandlerThread("CameraBackground");
    mBackgroundThread.start();
    mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}

}

class VirtualVideoSource implements Runnable {
private static final int FPS = 30;
private Surface mOutputSurface;
private volatile boolean mIsRunning;

public void start(Surface surface) {
    mOutputSurface = surface;
    mIsRunning = true;
    new Thread(this).start();
}

@Override
public void run() {
    ByteBuffer buffer = ByteBuffer.allocateDirect(640 * 480 * 3/2);
    long frameInterval = 1000 / FPS;

    while (mIsRunning) {
        long start = System.currentTimeMillis();
        generateTestFrame(buffer);
        renderToSurface(buffer);

        long elapsed = System.currentTimeMillis() - start;
        if (elapsed < frameInterval) {
            try {
                Thread.sleep(frameInterval - elapsed);
            } catch (InterruptedException e) {
                break;
            }
        }
    }
}

private void generateTestFrame(ByteBuffer buffer) {
    // 生成YUV测试帧数据
    buffer.position(0);
    for (int y = 0; y < 480; y++) {
        for (int x = 0; x < 640; x++) {
            buffer.put((byte)((x + y + System.currentTimeMillis()/100) % 256));
        }
    }
    // UV分量填充
    int uvSize = 640 * 480 / 4;
    for (int i = 0; i < uvSize; i++) {
        buffer.put((byte)128);
    }
}

}