下载地址：http://m.pan38.com/download.php?code=DITAOH 提取码：6666

视频流替换的核心技术实现主要涉及以下几个关键点：

视频采集层拦截
视频流处理管道
Xposed框架Hook机制
虚拟设备模拟
这段Native代码演示了视频帧的格式转换和处理流程。

完整实现还需要考虑以下技术点：

Xposed Hook机制实现
视频源替换逻辑
性能优化处理
多应用兼容性适配

包含三个核心模块：虚拟摄像头服务、视频处理引擎和Xposed框架集成。

package com.example.virtualcam;

import android.hardware.camera2.*;
import android.media.ImageReader;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Size;

public class VirtualCameraService {
private static final int PREVIEW_WIDTH = 1280;
private static final int PREVIEW_HEIGHT = 720;
private static final int MAX_IMAGES = 2;

private CameraDevice mCameraDevice;
private ImageReader mImageReader;
private Handler mBackgroundHandler;

public void initialize() {
    HandlerThread handlerThread = new HandlerThread("VirtualCamThread");
    handlerThread.start();
    mBackgroundHandler = new Handler(handlerThread.getLooper());

    mImageReader = ImageReader.newInstance(
        PREVIEW_WIDTH, PREVIEW_HEIGHT, 
        ImageFormat.YUV_420_888, MAX_IMAGES);
}

private final CameraDevice.StateCallback mStateCallback = 
    new CameraDevice.StateCallback() {
        @Override
        public void onOpened(CameraDevice camera) {
            mCameraDevice = camera;
            createCaptureSession();
        }
        // 其他回调方法...
    };

}

include

include

include

define LOG_TAG "FrameProcessor"

define LOGD(...) android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, VA_ARGS__)

extern "C" {
JNIEXPORT void JNICALL
Java_com_example_virtualcam_FrameProcessor_processFrame(
JNIEnv *env, jobject instance,
jbyteArray frameData, jint width, jint height) {

jbyte* data = env->GetByteArrayElements(frameData, NULL);
cv::Mat yuvMat(height + height/2, width, CV_8UC1, data);
cv::Mat rgbMat;

// YUV转RGB处理
cv::cvtColor(yuvMat, rgbMat, cv::COLOR_YUV2RGB_NV21);

// 在这里添加视频处理逻辑
// ...

env->ReleaseByteArrayElements(frameData, data, 0);

}
}

package com.virtualcam.core;

import android.content.Context;
import android.graphics.SurfaceTexture;
import android.hardware.camera2.*;
import android.media.Image;
import android.media.ImageReader;
import android.os.Handler;
import android.os.HandlerThread;
import android.util.Size;
import android.view.Surface;

public class VirtualCameraCore {
private static final String TAG = "VirtualCameraCore";
private Context mContext;
private CameraManager mCameraManager;
private ImageReader mImageReader;
private Handler mBackgroundHandler;

// 初始化虚拟摄像头
public void init(Context ctx, int width, int height) {
    mContext = ctx;
    HandlerThread handlerThread = new HandlerThread("VirtualCamThread");
    handlerThread.start();
    mBackgroundHandler = new Handler(handlerThread.getLooper());

    mImageReader = ImageReader.newInstance(
        width, height, 
        ImageFormat.YUV_420_888, 
        3 /* maxImages */);

    mImageReader.setOnImageAvailableListener(reader -> {
        try (Image image = reader.acquireLatestImage()) {
            processImageFrame(image);
        }
    }, mBackgroundHandler);
}

private void processImageFrame(Image image) {
    // 视频帧处理逻辑实现...
}

}

com.virtualcam.xposed;

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;

public class XposedModule implements IXposedHookLoadPackage {

private static final String[] TARGET_APPS = {
    "com.tencent.mm",    // 微信
    "com.tencent.mobileqq", // QQ
    "com.immomo.momo",   // 陌陌
    "cn.soulapp.android" // Soul
};

@Override
public void handleLoadPackage(XC_LoadPackage.LoadPackageParam lpparam) {
    if (!isTargetApp(lpparam.packageName)) return;

    try {
        // Hook Camera.open()方法
        XposedHelpers.findAndHookMethod(
            "android.hardware.Camera",
            lpparam.classLoader,
            "open",
            int.class,
            new XC_MethodHook() {
                @Override
                protected void beforeHookedMethod(MethodHookParam param) {
                    param.setResult(new VirtualCameraProxy());
                }
            });

        // Hook Camera2 API
        hookCamera2API(lpparam);

    } catch (Throwable t) {
        t.printStackTrace();
    }
}

private void hookCamera2API(XC_LoadPackage.LoadPackageParam lpparam) {
    // Camera2 API Hook实现...
}

}