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/15-puzzle/AndroidManifest.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.opencv.samples.puzzle15"
+    android:versionCode="301"
+    android:versionName="3.01" >
+
+    <uses-sdk android:minSdkVersion="8"/>
+
+    <application
+        android:icon="@drawable/icon"
+        android:label="@string/app_name" >
+
+        <activity
+            android:name=".Puzzle15Activity"
+            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>
+
+    <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"/>
+
+</manifest>

3rdparty/opencv-4.5.4/samples/android/15-puzzle/CMakeLists.txt

@@ -0,0 +1,6 @@
+set(sample example-15-puzzle)
+
+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/15-puzzle/build.gradle.in

@@ -0,0 +1,31 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion @ANDROID_COMPILE_SDK_VERSION@
+    defaultConfig {
+        applicationId "org.opencv.samples.puzzle15"
+        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/15-puzzle/gradle/AndroidManifest.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.opencv.samples.puzzle15"
+>
+
+    <application
+        android:icon="@drawable/icon"
+        android:label="@string/app_name">
+
+        <activity
+            android:name=".Puzzle15Activity"
+            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>
+
+    <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"/>
+
+</manifest>

3rdparty/opencv-4.5.4/samples/android/15-puzzle/res/values/strings.xml

@@ -0,0 +1,6 @@
+<resources>
+    <string name="app_name">OCV 15 Puzzle</string>
+    <string name="menu_toggle_tile_numbers">Show/hide tile numbers</string>
+    <string name="menu_start_new_game">Start new game</string>
+
+</resources>

3rdparty/opencv-4.5.4/samples/android/15-puzzle/src/org/opencv/samples/puzzle15/Puzzle15Activity.java

@@ -0,0 +1,153 @@
+package org.opencv.samples.puzzle15;
+
+import org.opencv.android.BaseLoaderCallback;
+import org.opencv.android.CameraActivity;
+import org.opencv.android.LoaderCallbackInterface;
+import org.opencv.android.OpenCVLoader;
+import org.opencv.core.Mat;
+import org.opencv.android.CameraBridgeViewBase;
+import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener;
+import org.opencv.android.JavaCameraView;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.WindowManager;
+
+import java.util.Collections;
+import java.util.List;
+
+public class Puzzle15Activity extends CameraActivity implements CvCameraViewListener, View.OnTouchListener {
+
+    private static final String  TAG = "Puzzle15::Activity";
+
+    private CameraBridgeViewBase mOpenCvCameraView;
+    private Puzzle15Processor    mPuzzle15;
+    private MenuItem             mItemHideNumbers;
+    private MenuItem             mItemStartNewGame;
+
+
+    private int                  mGameWidth;
+    private int                  mGameHeight;
+
+    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
+
+        @Override
+        public void onManagerConnected(int status) {
+            switch (status) {
+                case LoaderCallbackInterface.SUCCESS:
+                {
+                    Log.i(TAG, "OpenCV loaded successfully");
+
+                    /* Now enable camera view to start receiving frames */
+                    mOpenCvCameraView.setOnTouchListener(Puzzle15Activity.this);
+                    mOpenCvCameraView.enableView();
+                } break;
+                default:
+                {
+                    super.onManagerConnected(status);
+                } break;
+            }
+        }
+    };
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+
+        Log.d(TAG, "Creating and setting view");
+        mOpenCvCameraView = (CameraBridgeViewBase) new JavaCameraView(this, -1);
+        setContentView(mOpenCvCameraView);
+        mOpenCvCameraView.setVisibility(CameraBridgeViewBase.VISIBLE);
+        mOpenCvCameraView.setCvCameraViewListener(this);
+        mPuzzle15 = new Puzzle15Processor();
+        mPuzzle15.prepareNewGame();
+    }
+
+    @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 boolean onCreateOptionsMenu(Menu menu) {
+        Log.i(TAG, "called onCreateOptionsMenu");
+        mItemHideNumbers = menu.add("Show/hide tile numbers");
+        mItemStartNewGame = menu.add("Start new game");
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        Log.i(TAG, "Menu Item selected " + item);
+        if (item == mItemStartNewGame) {
+            /* We need to start new game */
+            mPuzzle15.prepareNewGame();
+        } else if (item == mItemHideNumbers) {
+            /* We need to enable or disable drawing of the tile numbers */
+            mPuzzle15.toggleTileNumbers();
+        }
+        return true;
+    }
+
+    public void onCameraViewStarted(int width, int height) {
+        mGameWidth = width;
+        mGameHeight = height;
+        mPuzzle15.prepareGameSize(width, height);
+    }
+
+    public void onCameraViewStopped() {
+    }
+
+    public boolean onTouch(View view, MotionEvent event) {
+        int xpos, ypos;
+
+        xpos = (view.getWidth() - mGameWidth) / 2;
+        xpos = (int)event.getX() - xpos;
+
+        ypos = (view.getHeight() - mGameHeight) / 2;
+        ypos = (int)event.getY() - ypos;
+
+        if (xpos >=0 && xpos <= mGameWidth && ypos >=0  && ypos <= mGameHeight) {
+            /* click is inside the picture. Deliver this event to processor */
+            mPuzzle15.deliverTouchEvent(xpos, ypos);
+        }
+
+        return false;
+    }
+
+    public Mat onCameraFrame(Mat inputFrame) {
+        return mPuzzle15.puzzleFrame(inputFrame);
+    }
+}

3rdparty/opencv-4.5.4/samples/android/15-puzzle/src/org/opencv/samples/puzzle15/Puzzle15Processor.java

@@ -0,0 +1,195 @@
+package org.opencv.samples.puzzle15;
+
+import org.opencv.core.Core;
+import org.opencv.core.CvType;
+import org.opencv.core.Mat;
+import org.opencv.core.Scalar;
+import org.opencv.core.Size;
+import org.opencv.core.Point;
+import org.opencv.imgproc.Imgproc;
+
+import android.util.Log;
+
+
+/**
+ * This class is a controller for puzzle game.
+ * It converts the image from Camera into the shuffled image
+ */
+public class Puzzle15Processor {
+
+    private static final int GRID_SIZE = 4;
+    private static final int GRID_AREA = GRID_SIZE * GRID_SIZE;
+    private static final int GRID_EMPTY_INDEX = GRID_AREA - 1;
+    private static final String TAG = "Puzzle15Processor";
+    private static final Scalar GRID_EMPTY_COLOR = new Scalar(0x33, 0x33, 0x33, 0xFF);
+
+    private int[]   mIndexes;
+    private int[]   mTextWidths;
+    private int[]   mTextHeights;
+
+    private Mat mRgba15;
+    private Mat[] mCells15;
+    private boolean mShowTileNumbers = true;
+
+    public Puzzle15Processor() {
+        mTextWidths = new int[GRID_AREA];
+        mTextHeights = new int[GRID_AREA];
+
+        mIndexes = new int [GRID_AREA];
+
+        for (int i = 0; i < GRID_AREA; i++)
+            mIndexes[i] = i;
+    }
+
+    /* this method is intended to make processor prepared for a new game */
+    public synchronized void prepareNewGame() {
+        do {
+            shuffle(mIndexes);
+        } while (!isPuzzleSolvable());
+    }
+
+    /* This method is to make the processor know the size of the frames that
+     * will be delivered via puzzleFrame.
+     * If the frames will be different size - then the result is unpredictable
+     */
+    public synchronized void prepareGameSize(int width, int height) {
+        mRgba15 = new Mat(height, width, CvType.CV_8UC4);
+        mCells15 = new Mat[GRID_AREA];
+
+        for (int i = 0; i < GRID_SIZE; i++) {
+            for (int j = 0; j < GRID_SIZE; j++) {
+                int k = i * GRID_SIZE + j;
+                mCells15[k] = mRgba15.submat(i * height / GRID_SIZE, (i + 1) * height / GRID_SIZE, j * width / GRID_SIZE, (j + 1) * width / GRID_SIZE);
+            }
+        }
+
+        for (int i = 0; i < GRID_AREA; i++) {
+            Size s = Imgproc.getTextSize(Integer.toString(i + 1), 3/* CV_FONT_HERSHEY_COMPLEX */, 1, 2, null);
+            mTextHeights[i] = (int) s.height;
+            mTextWidths[i] = (int) s.width;
+        }
+    }
+
+    /* this method to be called from the outside. it processes the frame and shuffles
+     * the tiles as specified by mIndexes array
+     */
+    public synchronized Mat puzzleFrame(Mat inputPicture) {
+        Mat[] cells = new Mat[GRID_AREA];
+        int rows = inputPicture.rows();
+        int cols = inputPicture.cols();
+
+        rows = rows - rows%4;
+        cols = cols - cols%4;
+
+        for (int i = 0; i < GRID_SIZE; i++) {
+            for (int j = 0; j < GRID_SIZE; j++) {
+                int k = i * GRID_SIZE + j;
+                cells[k] = inputPicture.submat(i * inputPicture.rows() / GRID_SIZE, (i + 1) * inputPicture.rows() / GRID_SIZE, j * inputPicture.cols()/ GRID_SIZE, (j + 1) * inputPicture.cols() / GRID_SIZE);
+            }
+        }
+
+        rows = rows - rows%4;
+        cols = cols - cols%4;
+
+        // copy shuffled tiles
+        for (int i = 0; i < GRID_AREA; i++) {
+            int idx = mIndexes[i];
+            if (idx == GRID_EMPTY_INDEX)
+                mCells15[i].setTo(GRID_EMPTY_COLOR);
+            else {
+                cells[idx].copyTo(mCells15[i]);
+                if (mShowTileNumbers) {
+                    Imgproc.putText(mCells15[i], Integer.toString(1 + idx), new Point((cols / GRID_SIZE - mTextWidths[idx]) / 2,
+                            (rows / GRID_SIZE + mTextHeights[idx]) / 2), 3/* CV_FONT_HERSHEY_COMPLEX */, 1, new Scalar(255, 0, 0, 255), 2);
+                }
+            }
+        }
+
+        for (int i = 0; i < GRID_AREA; i++)
+            cells[i].release();
+
+        drawGrid(cols, rows, mRgba15);
+
+        return mRgba15;
+    }
+
+    public void toggleTileNumbers() {
+        mShowTileNumbers = !mShowTileNumbers;
+    }
+
+    public void deliverTouchEvent(int x, int y) {
+        int rows = mRgba15.rows();
+        int cols = mRgba15.cols();
+
+        int row = (int) Math.floor(y * GRID_SIZE / rows);
+        int col = (int) Math.floor(x * GRID_SIZE / cols);
+
+        if (row < 0 || row >= GRID_SIZE || col < 0 || col >= GRID_SIZE) {
+            Log.e(TAG, "It is not expected to get touch event outside of picture");
+            return ;
+        }
+
+        int idx = row * GRID_SIZE + col;
+        int idxtoswap = -1;
+
+        // left
+        if (idxtoswap < 0 && col > 0)
+            if (mIndexes[idx - 1] == GRID_EMPTY_INDEX)
+                idxtoswap = idx - 1;
+        // right
+        if (idxtoswap < 0 && col < GRID_SIZE - 1)
+            if (mIndexes[idx + 1] == GRID_EMPTY_INDEX)
+                idxtoswap = idx + 1;
+        // top
+        if (idxtoswap < 0 && row > 0)
+            if (mIndexes[idx - GRID_SIZE] == GRID_EMPTY_INDEX)
+                idxtoswap = idx - GRID_SIZE;
+        // bottom
+        if (idxtoswap < 0 && row < GRID_SIZE - 1)
+            if (mIndexes[idx + GRID_SIZE] == GRID_EMPTY_INDEX)
+                idxtoswap = idx + GRID_SIZE;
+
+        // swap
+        if (idxtoswap >= 0) {
+            synchronized (this) {
+                int touched = mIndexes[idx];
+                mIndexes[idx] = mIndexes[idxtoswap];
+                mIndexes[idxtoswap] = touched;
+            }
+        }
+    }
+
+    private void drawGrid(int cols, int rows, Mat drawMat) {
+        for (int i = 1; i < GRID_SIZE; i++) {
+            Imgproc.line(drawMat, new Point(0, i * rows / GRID_SIZE), new Point(cols, i * rows / GRID_SIZE), new Scalar(0, 255, 0, 255), 3);
+            Imgproc.line(drawMat, new Point(i * cols / GRID_SIZE, 0), new Point(i * cols / GRID_SIZE, rows), new Scalar(0, 255, 0, 255), 3);
+        }
+    }
+
+    private static void shuffle(int[] array) {
+        for (int i = array.length; i > 1; i--) {
+            int temp = array[i - 1];
+            int randIx = (int) (Math.random() * i);
+            array[i - 1] = array[randIx];
+            array[randIx] = temp;
+        }
+    }
+
+    private boolean isPuzzleSolvable() {
+
+        int sum = 0;
+        for (int i = 0; i < GRID_AREA; i++) {
+            if (mIndexes[i] == GRID_EMPTY_INDEX)
+                sum += (i / GRID_SIZE) + 1;
+            else {
+                int smaller = 0;
+                for (int j = i + 1; j < GRID_AREA; j++) {
+                    if (mIndexes[j] < mIndexes[i])
+                        smaller++;
+                }
+                sum += smaller;
+            }
+        }
+        return sum % 2 == 0;
+    }
+}