feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/CMakeLists.txt

@@ -0,0 +1,6 @@
+set(sample example-tutorial-3-cameracontrol)
+
+add_android_project(${sample} "${CMAKE_CURRENT_SOURCE_DIR}" LIBRARY_DEPS "${OPENCV_ANDROID_LIB_DIR}" SDK_TARGET 11 "${ANDROID_SDK_TARGET}")
+if(TARGET ${sample})
+  add_dependencies(opencv_android_examples ${sample})
+endif()

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/build.gradle.in

@@ -0,0 +1,31 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion @ANDROID_COMPILE_SDK_VERSION@
+    defaultConfig {
+        applicationId "org.opencv.samples.tutorial3"
+        minSdkVersion @ANDROID_MIN_SDK_VERSION@
+        targetSdkVersion @ANDROID_TARGET_SDK_VERSION@
+        versionCode 301
+        versionName "3.01"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    sourceSets {
+        main {
+            java.srcDirs = @ANDROID_SAMPLE_JAVA_PATH@
+            aidl.srcDirs = @ANDROID_SAMPLE_JAVA_PATH@
+            res.srcDirs = @ANDROID_SAMPLE_RES_PATH@
+            manifest.srcFile '@ANDROID_SAMPLE_MANIFEST_PATH@'
+        }
+    }
+}
+
+dependencies {
+    //implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation project(':opencv')
+}

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/gradle/AndroidManifest.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="org.opencv.samples.tutorial3"
+>
+
+    <application
+        android:label="@string/app_name"
+        android:icon="@drawable/icon">
+
+        <activity android:name="Tutorial3Activity"
+                  android:label="@string/app_name"
+                  android:screenOrientation="landscape"
+                  android:configChanges="keyboardHidden|orientation">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+    <supports-screens android:resizeable="true"
+                      android:smallScreens="true"
+                      android:normalScreens="true"
+                      android:largeScreens="true"
+                      android:anyDensity="true" />
+
+    <uses-permission android:name="android.permission.CAMERA"/>
+
+    <uses-feature android:name="android.hardware.camera" android:required="false"/>
+    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>
+    <uses-feature android:name="android.hardware.camera.front" android:required="false"/>
+    <uses-feature android:name="android.hardware.camera.front.autofocus" android:required="false"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+</manifest>

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/res/layout/tutorial3_surface_view.xml

@@ -0,0 +1,12 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <org.opencv.samples.tutorial3.Tutorial3View
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        android:id="@+id/tutorial3_activity_java_surface_view" />
+
+</LinearLayout>

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/res/values/strings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">OCV T3 Camera Control</string>
+</resources>

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/src/org/opencv/samples/tutorial3/Tutorial3Activity.java

@@ -0,0 +1,202 @@
+package org.opencv.samples.tutorial3;
+
+import java.text.SimpleDateFormat;
+import java.util.Collections;
+import java.util.Date;
+import java.util.List;
+import java.util.ListIterator;
+
+import org.opencv.android.BaseLoaderCallback;
+import org.opencv.android.CameraActivity;
+import org.opencv.android.CameraBridgeViewBase;
+import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
+import org.opencv.android.LoaderCallbackInterface;
+import org.opencv.android.OpenCVLoader;
+import org.opencv.core.Mat;
+import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
+
+import android.annotation.SuppressLint;
+import android.hardware.Camera.Size;
+import android.os.Bundle;
+import android.os.Environment;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.SubMenu;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.View.OnTouchListener;
+import android.view.WindowManager;
+import android.widget.Toast;
+
+public class Tutorial3Activity extends CameraActivity implements CvCameraViewListener2, OnTouchListener {
+    private static final String TAG = "OCVSample::Activity";
+
+    private Tutorial3View mOpenCvCameraView;
+    private List<Size> mResolutionList;
+    private Menu mMenu;
+    private boolean mCameraStarted = false;
+    private boolean mMenuItemsCreated = false;
+    private MenuItem[] mEffectMenuItems;
+    private SubMenu mColorEffectsMenu;
+    private MenuItem[] mResolutionMenuItems;
+    private SubMenu mResolutionMenu;
+
+    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
+        @Override
+        public void onManagerConnected(int status) {
+            switch (status) {
+                case LoaderCallbackInterface.SUCCESS:
+                {
+                    Log.i(TAG, "OpenCV loaded successfully");
+                    mOpenCvCameraView.enableView();
+                    mOpenCvCameraView.setOnTouchListener(Tutorial3Activity.this);
+                } break;
+                default:
+                {
+                    super.onManagerConnected(status);
+                } break;
+            }
+        }
+    };
+
+    public Tutorial3Activity() {
+        Log.i(TAG, "Instantiated new " + this.getClass());
+    }
+
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        Log.i(TAG, "called onCreate");
+        super.onCreate(savedInstanceState);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+
+        setContentView(R.layout.tutorial3_surface_view);
+
+        mOpenCvCameraView = (Tutorial3View) findViewById(R.id.tutorial3_activity_java_surface_view);
+
+        mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
+
+        mOpenCvCameraView.setCvCameraViewListener(this);
+    }
+
+    @Override
+    public void onPause()
+    {
+        super.onPause();
+        if (mOpenCvCameraView != null)
+            mOpenCvCameraView.disableView();
+    }
+
+    @Override
+    public void onResume()
+    {
+        super.onResume();
+        if (!OpenCVLoader.initDebug()) {
+            Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
+            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
+        } else {
+            Log.d(TAG, "OpenCV library found inside package. Using it!");
+            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
+        }
+    }
+
+    @Override
+    protected List<? extends CameraBridgeViewBase> getCameraViewList() {
+        return Collections.singletonList(mOpenCvCameraView);
+    }
+
+    public void onDestroy() {
+        super.onDestroy();
+        if (mOpenCvCameraView != null)
+            mOpenCvCameraView.disableView();
+    }
+
+    @Override
+    public void onCameraViewStarted(int width, int height) {
+        mCameraStarted = true;
+        setupMenuItems();
+    }
+
+    public void onCameraViewStopped() {
+    }
+
+    public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
+        return inputFrame.rgba();
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        mMenu = menu;
+        setupMenuItems();
+        return true;
+    }
+
+    private void setupMenuItems() {
+        if (mMenu == null || !mCameraStarted || mMenuItemsCreated) {
+            return;
+        }
+        List<String> effects = mOpenCvCameraView.getEffectList();
+
+        if (effects == null) {
+            Log.e(TAG, "Color effects are not supported by device!");
+            return;
+        }
+
+        mColorEffectsMenu = mMenu.addSubMenu("Color Effect");
+        mEffectMenuItems = new MenuItem[effects.size()];
+
+        int idx = 0;
+        ListIterator<String> effectItr = effects.listIterator();
+        for (String effect: effects) {
+            mEffectMenuItems[idx] = mColorEffectsMenu.add(1, idx, Menu.NONE, effect);
+            idx++;
+        }
+
+        mResolutionMenu = mMenu.addSubMenu("Resolution");
+        mResolutionList = mOpenCvCameraView.getResolutionList();
+        mResolutionMenuItems = new MenuItem[mResolutionList.size()];
+
+        idx = 0;
+        for (Size resolution: mResolutionList) {
+            mResolutionMenuItems[idx] = mResolutionMenu.add(2, idx, Menu.NONE,
+                    Integer.valueOf(resolution.width).toString() + "x" + Integer.valueOf(resolution.height).toString());
+            idx++;
+        }
+        mMenuItemsCreated = true;
+    }
+
+    public boolean onOptionsItemSelected(MenuItem item) {
+        Log.i(TAG, "called onOptionsItemSelected; selected item: " + item);
+        if (item.getGroupId() == 1)
+        {
+            mOpenCvCameraView.setEffect((String) item.getTitle());
+            Toast.makeText(this, mOpenCvCameraView.getEffect(), Toast.LENGTH_SHORT).show();
+        }
+        else if (item.getGroupId() == 2)
+        {
+            int id = item.getItemId();
+            Size resolution = mResolutionList.get(id);
+            mOpenCvCameraView.setResolution(resolution);
+            resolution = mOpenCvCameraView.getResolution();
+            String caption = Integer.valueOf(resolution.width).toString() + "x" + Integer.valueOf(resolution.height).toString();
+            Toast.makeText(this, caption, Toast.LENGTH_SHORT).show();
+        }
+
+        return true;
+    }
+
+    @SuppressLint("SimpleDateFormat")
+    @Override
+    public boolean onTouch(View v, MotionEvent event) {
+        Log.i(TAG,"onTouch event");
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
+        String currentDateandTime = sdf.format(new Date());
+        String fileName = Environment.getExternalStorageDirectory().getPath() +
+                               "/sample_picture_" + currentDateandTime + ".jpg";
+        mOpenCvCameraView.takePicture(fileName);
+        Toast.makeText(this, fileName + " saved", Toast.LENGTH_SHORT).show();
+        return false;
+    }
+}

3rdparty/opencv-4.5.4/samples/android/tutorial-3-cameracontrol/src/org/opencv/samples/tutorial3/Tutorial3View.java

@@ -0,0 +1,87 @@
+package org.opencv.samples.tutorial3;
+
+import java.io.FileOutputStream;
+import java.util.List;
+
+import org.opencv.android.JavaCameraView;
+
+import android.content.Context;
+import android.hardware.Camera;
+import android.hardware.Camera.PictureCallback;
+import android.hardware.Camera.Size;
+import android.util.AttributeSet;
+import android.util.Log;
+
+public class Tutorial3View extends JavaCameraView implements PictureCallback {
+
+    private static final String TAG = "Sample::Tutorial3View";
+    private String mPictureFileName;
+
+    public Tutorial3View(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public List<String> getEffectList() {
+        return mCamera.getParameters().getSupportedColorEffects();
+    }
+
+    public boolean isEffectSupported() {
+        return (mCamera.getParameters().getColorEffect() != null);
+    }
+
+    public String getEffect() {
+        return mCamera.getParameters().getColorEffect();
+    }
+
+    public void setEffect(String effect) {
+        Camera.Parameters params = mCamera.getParameters();
+        params.setColorEffect(effect);
+        mCamera.setParameters(params);
+    }
+
+    public List<Size> getResolutionList() {
+        return mCamera.getParameters().getSupportedPreviewSizes();
+    }
+
+    public void setResolution(Size resolution) {
+        disconnectCamera();
+        mMaxHeight = resolution.height;
+        mMaxWidth = resolution.width;
+        connectCamera(getWidth(), getHeight());
+    }
+
+    public Size getResolution() {
+        return mCamera.getParameters().getPreviewSize();
+    }
+
+    public void takePicture(final String fileName) {
+        Log.i(TAG, "Taking picture");
+        this.mPictureFileName = fileName;
+        // Postview and jpeg are sent in the same buffers if the queue is not empty when performing a capture.
+        // Clear up buffers to avoid mCamera.takePicture to be stuck because of a memory issue
+        mCamera.setPreviewCallback(null);
+
+        // PictureCallback is implemented by the current class
+        mCamera.takePicture(null, null, this);
+    }
+
+    @Override
+    public void onPictureTaken(byte[] data, Camera camera) {
+        Log.i(TAG, "Saving a bitmap to file");
+        // The camera preview was automatically stopped. Start it again.
+        mCamera.startPreview();
+        mCamera.setPreviewCallback(this);
+
+        // Write the image in a file (in jpeg format)
+        try {
+            FileOutputStream fos = new FileOutputStream(mPictureFileName);
+
+            fos.write(data);
+            fos.close();
+
+        } catch (java.io.IOException e) {
+            Log.e("PictureDemo", "Exception in photoCallback", e);
+        }
+
+    }
+}