Create Engine class

cameraview/src/androidTest/java/com/otaliastudios/cameraview/CameraViewCallbacksTest.java

@@ -10,6 +10,8 @@ import androidx.test.filters.MediumTest;
 import android.view.ViewGroup;
 
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.Engine;
+import com.otaliastudios.cameraview.controls.Preview;
 import com.otaliastudios.cameraview.engine.CameraEngine;
 import com.otaliastudios.cameraview.frame.Frame;
 import com.otaliastudios.cameraview.frame.FrameProcessor;
@@ -37,7 +39,6 @@ import static org.junit.Assert.assertNull;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyFloat;
 import static org.mockito.Matchers.anyInt;
-import static org.mockito.Matchers.floatThat;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
@@ -70,14 +71,14 @@ public class CameraViewCallbacksTest extends BaseTest {
 
                     @NonNull
                     @Override
-                    protected CameraEngine instantiateCameraController(@NonNull CameraEngine.Callback callback) {
+                    protected CameraEngine instantiateCameraEngine(@NonNull Engine engine, @NonNull CameraEngine.Callback callback) {
                         mockController = new MockCameraEngine(callback);
                         return mockController;
                     }
 
                     @NonNull
                     @Override
-                    protected CameraPreview instantiatePreview(@NonNull Context context, @NonNull ViewGroup container) {
+                    protected CameraPreview instantiatePreview(@NonNull Preview preview, @NonNull Context context, @NonNull ViewGroup container) {
                         mockPreview = new MockCameraPreview(context, container);
                         return mockPreview;
                     }
@@ -87,7 +88,7 @@ public class CameraViewCallbacksTest extends BaseTest {
                         return true;
                     }
                 };
-                camera.instantiatePreview();
+                camera.doInstantiatePreview();
                 camera.addCameraListener(listener);
                 camera.addFrameProcessor(processor);
                 task = new Task<>(true);

cameraview/src/androidTest/java/com/otaliastudios/cameraview/CameraViewTest.java

@@ -13,8 +13,10 @@ import android.view.ViewGroup;
 
 import com.otaliastudios.cameraview.controls.Audio;
 import com.otaliastudios.cameraview.controls.ControlParser;
+import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.Flash;
+import com.otaliastudios.cameraview.controls.Preview;
 import com.otaliastudios.cameraview.engine.CameraEngine;
 import com.otaliastudios.cameraview.frame.Frame;
 import com.otaliastudios.cameraview.frame.FrameProcessor;
@@ -40,14 +42,10 @@ import com.otaliastudios.cameraview.size.Size;
 import com.otaliastudios.cameraview.size.SizeSelector;
 import com.otaliastudios.cameraview.size.SizeSelectors;
 
-import org.hamcrest.BaseMatcher;
-import org.hamcrest.Description;
-import org.hamcrest.Matcher;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Matchers;
 import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
 
@@ -77,14 +75,14 @@ public class CameraViewTest extends BaseTest {
 
                     @NonNull
                     @Override
-                    protected CameraEngine instantiateCameraController(@NonNull CameraEngine.Callback callback) {
+                    protected CameraEngine instantiateCameraEngine(@NonNull Engine engine, @NonNull CameraEngine.Callback callback) {
                         mockController = spy(new MockCameraEngine(callback));
                         return mockController;
                     }
 
                     @NonNull
                     @Override
-                    protected CameraPreview instantiatePreview(@NonNull Context context, @NonNull ViewGroup container) {
+                    protected CameraPreview instantiatePreview(@NonNull Preview preview, @NonNull Context context, @NonNull ViewGroup container) {
                         mockPreview = spy(new MockCameraPreview(context, container));
                         return mockPreview;
                     }
@@ -95,7 +93,7 @@ public class CameraViewTest extends BaseTest {
                     }
                 };
                 // Instantiate preview now.
-                cameraView.instantiatePreview();
+                cameraView.doInstantiatePreview();
             }
         });
     }

cameraview/src/androidTest/java/com/otaliastudios/cameraview/engine/IntegrationTest.java

@@ -15,6 +15,7 @@ import com.otaliastudios.cameraview.PictureResult;
 import com.otaliastudios.cameraview.TestActivity;
 import com.otaliastudios.cameraview.VideoResult;
 import com.otaliastudios.cameraview.controls.Audio;
+import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Flash;
 import com.otaliastudios.cameraview.controls.Hdr;
 import com.otaliastudios.cameraview.controls.Mode;
@@ -87,7 +88,7 @@ public class IntegrationTest extends BaseTest {
 
                     @NonNull
                     @Override
-                    protected CameraEngine instantiateCameraController(@NonNull CameraEngine.Callback callback) {
+                    protected CameraEngine instantiateCameraEngine(@NonNull Engine engine, @NonNull CameraEngine.Callback callback) {
                         controller = new Camera1Engine(callback);
                         return controller;
                     }

cameraview/src/main/java/com/otaliastudios/cameraview/CameraOptions.java

@@ -5,6 +5,7 @@ import android.hardware.Camera;
 
 import com.otaliastudios.cameraview.controls.Audio;
 import com.otaliastudios.cameraview.controls.Control;
+import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.Flash;
 import com.otaliastudios.cameraview.engine.Mapper;
@@ -183,6 +184,8 @@ public class CameraOptions {
             return (Collection<T>) Arrays.asList(VideoCodec.values());
         } else if (controlClass.equals(WhiteBalance.class)) {
             return (Collection<T>) getSupportedWhiteBalance();
+        } else if (controlClass.equals(Engine.class)) {
+            return (Collection<T>) Arrays.asList(Engine.values());
         }
         // Unrecognized control.
         return Collections.emptyList();
@@ -311,8 +314,7 @@ public class CameraOptions {
 
     /**
      * Whether auto focus is supported. This means you can map gestures to
-     * {@link GestureAction#FOCUS} or {@link GestureAction#FOCUS_WITH_MARKER}
+     * {@link GestureAction#AUTO_FOCUS} and focus will be changed on tap.
-     * and focus will be changed on tap.
      *
      * @return whether auto focus is supported.
      */

cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java

@@ -33,6 +33,7 @@ import android.widget.FrameLayout;
 import com.otaliastudios.cameraview.controls.Audio;
 import com.otaliastudios.cameraview.controls.Control;
 import com.otaliastudios.cameraview.controls.ControlParser;
+import com.otaliastudios.cameraview.controls.Engine;
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.controls.Flash;
 import com.otaliastudios.cameraview.markers.MarkerLayout;
@@ -100,6 +101,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     private boolean mPlaySounds;
     private HashMap<Gesture, GestureAction> mGestureMap = new HashMap<>(4);
     private Preview mPreview;
+    private Engine mEngine;
 
     // Components
     @VisibleForTesting CameraCallbacks mCameraCallbacks;
@@ -148,8 +150,9 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         boolean playSounds = a.getBoolean(R.styleable.CameraView_cameraPlaySounds, DEFAULT_PLAY_SOUNDS);
         mExperimental = a.getBoolean(R.styleable.CameraView_cameraExperimental, false);
         mPreview = controls.getPreview();
+        mEngine = controls.getEngine();
 
-        // Camera controller params
+        // Camera engine params
         int gridColor = a.getColor(R.styleable.CameraView_cameraGridColor, GridLinesLayout.DEFAULT_COLOR);
         long videoMaxSize = (long) a.getFloat(R.styleable.CameraView_cameraVideoMaxSize, 0);
         int videoMaxDuration = a.getInteger(R.styleable.CameraView_cameraVideoMaxDuration, 0);
@@ -166,7 +169,6 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
 
         // Components
         mCameraCallbacks = new CameraCallbacks();
-        mCameraEngine = instantiateCameraController(mCameraCallbacks);
         mUiHandler = new Handler(Looper.getMainLooper());
         mFrameProcessorsHandler = WorkerHandler.get("FrameProcessorsWorker");
 
@@ -182,16 +184,20 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         addView(mScrollGestureLayout);
         addView(mMarkerLayout);
 
+        // Create the engine
+        doInstantiateEngine();
+
         // Apply self managed
         setPlaySounds(playSounds);
+        setGrid(controls.getGrid());
+        setGridColor(gridColor);
 
-        // Apply camera controller params
+        // Apply camera engine params
+        // Adding new ones? See setEngine().
         setFacing(controls.getFacing());
         setFlash(controls.getFlash());
         setMode(controls.getMode());
         setWhiteBalance(controls.getWhiteBalance());
-        setGrid(controls.getGrid());
-        setGridColor(gridColor);
         setHdr(controls.getHdr());
         setAudio(controls.getAudio());
         setAudioBitRate(audioBitRate);
@@ -220,24 +226,33 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
 
     /**
      * Instantiates the camera engine.
+     *
+     * @param engine the engine preference
      * @param callback the engine callback
      * @return the engine
      */
     @NonNull
-    protected CameraEngine instantiateCameraController(@NonNull CameraEngine.Callback callback) {
+    protected CameraEngine instantiateCameraEngine(@NonNull Engine engine, @NonNull CameraEngine.Callback callback) {
-        return new Camera1Engine(callback);
+        if (mExperimental && engine == Engine.CAMERA2) {
+            throw new RuntimeException("TODO");
+        } else {
+            mEngine = Engine.CAMERA1;
+            return new Camera1Engine(callback);
+        }
     }
 
     /**
      * Instantiates the camera preview.
+     *
+     * @param preview current preview value
      * @param context a context
      * @param container the container
      * @return the preview
      */
     @NonNull
-    protected CameraPreview instantiatePreview(@NonNull Context context, @NonNull ViewGroup container) {
+    protected CameraPreview instantiatePreview(@NonNull Preview preview, @NonNull Context context, @NonNull ViewGroup container) {
         LOG.w("preview:", "isHardwareAccelerated:", isHardwareAccelerated());
-        switch (mPreview) {
+        switch (preview) {
             case SURFACE:
                 return new SurfaceCameraPreview(context, container, null);
             case TEXTURE: {
@@ -254,18 +269,22 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     }
 
     @VisibleForTesting
-    void instantiatePreview() {
+    void doInstantiatePreview() {
-        mCameraPreview = instantiatePreview(getContext(), this);
+        mCameraPreview = instantiatePreview(mPreview, getContext(), this);
         mCameraEngine.setPreview(mCameraPreview);
     }
 
+    private void doInstantiateEngine() {
+        mCameraEngine = instantiateCameraEngine(mEngine, mCameraCallbacks);
+    }
+
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
         if (mCameraPreview == null) {
             // isHardwareAccelerated will return the real value only after we are
             // attached. That's why we instantiate the preview here.
-            instantiatePreview();
+            doInstantiatePreview();
         }
         if (!isInEditMode()) {
             mOrientationHelper.enable(getContext());
@@ -719,10 +738,64 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
             setVideoCodec((VideoCodec) control);
         } else if (control instanceof Preview) {
             setPreview((Preview) control);
+        } else if (control instanceof Engine) {
+            setEngine((Engine) control);
         }
     }
 
 
+    /**
+     * Controls the preview engine. Should only be called
+     * if this CameraView was never added to any window
+     * (like if you created it programmatically).
+     * Otherwise, it has no effect.
+     *
+     * @see Preview#SURFACE
+     * @see Preview#TEXTURE
+     * @see Preview#GL_SURFACE
+     *
+     * @param preview desired preview engine
+     */
+    public void setPreview(@NonNull Preview preview) {
+        mPreview = preview;
+    }
+
+
+    /**
+     * Controls the core engine. Should only be called
+     * if this CameraView is closed (open() was never called).
+     * Otherwise, it has no effect.
+     *
+     * @see Engine#CAMERA1
+     * @see Engine#CAMERA2
+     *
+     * @param engine desired engine
+     */
+    public void setEngine(@NonNull Engine engine) {
+        if (!isClosed()) return;
+        mEngine = engine;
+        CameraEngine oldEngine = mCameraEngine;
+        doInstantiateEngine();
+        if (mCameraPreview != null) mCameraEngine.setPreview(mCameraPreview);
+
+        // Set again all parameters
+        setFacing(oldEngine.getFacing());
+        setFlash(oldEngine.getFlash());
+        setMode(oldEngine.getMode());
+        setWhiteBalance(oldEngine.getWhiteBalance());
+        setHdr(oldEngine.getHdr());
+        setAudio(oldEngine.getAudio());
+        setAudioBitRate(oldEngine.getAudioBitRate());
+        setPictureSize(oldEngine.getPictureSizeSelector());
+        setVideoSize(oldEngine.getVideoSizeSelector());
+        setVideoCodec(oldEngine.getVideoCodec());
+        setVideoMaxSize(oldEngine.getVideoMaxSize());
+        setVideoMaxDuration(oldEngine.getVideoMaxDuration());
+        setVideoBitRate(oldEngine.getVideoBitRate());
+        setAutoFocusResetDelay(oldEngine.getAutoFocusResetDelay());
+    }
+
+
     /**
      * Returns a {@link CameraOptions} instance holding supported options for this camera
      * session. This might change over time. It's better to hold a reference from
@@ -854,23 +927,6 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     }
 
 
-    /**
-     * Controls the preview engine. Should only be called
-     * if this CameraView was never added to any window
-     * (like if you created it programmatically).
-     * Otherwise, it has no effect.
-     *
-     * @see Preview#SURFACE
-     * @see Preview#TEXTURE
-     * @see Preview#GL_SURFACE
-     *
-     * @param preview desired preview engine
-     */
-    public void setPreview(@NonNull Preview preview) {
-        mPreview = preview;
-    }
-
-
     /**
      * Gets the current hdr value.
      * @return the current hdr value

cameraview/src/main/java/com/otaliastudios/cameraview/controls/ControlParser.java

@@ -21,6 +21,7 @@ public class ControlParser {
     private int hdr;
     private int audio;
     private int videoCodec;
+    private int engine;
 
     public ControlParser(@NonNull Context context, @NonNull TypedArray array) {
         this.preview = array.getInteger(R.styleable.CameraView_cameraPreview, Preview.DEFAULT.value());
@@ -32,6 +33,7 @@ public class ControlParser {
         this.hdr = array.getInteger(R.styleable.CameraView_cameraHdr, Hdr.DEFAULT.value());
         this.audio = array.getInteger(R.styleable.CameraView_cameraAudio, Audio.DEFAULT.value());
         this.videoCodec = array.getInteger(R.styleable.CameraView_cameraVideoCodec, VideoCodec.DEFAULT.value());
+        this.engine = array.getInteger(R.styleable.CameraView_cameraEngine, Engine.DEFAULT.value());
     }
 
     public Preview getPreview() {
@@ -69,4 +71,8 @@ public class ControlParser {
     public VideoCodec getVideoCodec() {
         return VideoCodec.fromValue(videoCodec);
     }
+
+    public Engine getEngine() {
+        return Engine.fromValue(engine);
+    }
 }

cameraview/src/main/java/com/otaliastudios/cameraview/controls/Engine.java

@@ -0,0 +1,48 @@
+package com.otaliastudios.cameraview.controls;
+
+
+import com.otaliastudios.cameraview.CameraView;
+
+import androidx.annotation.Nullable;
+
+/**
+ * The engine to be used.
+ *
+ * @see CameraView#setEngine(Engine)
+ */
+public enum Engine implements Control {
+
+    /**
+     * Camera1 based engine.
+     */
+    CAMERA1(0),
+
+    /**
+     * Camera2 based engine. For API versions older than 21,
+     * the system falls back to {@link #CAMERA1}.
+     */
+    CAMERA2(1);
+
+    final static Engine DEFAULT = CAMERA1;
+
+    private int value;
+
+    Engine(int value) {
+        this.value = value;
+    }
+
+    int value() {
+        return value;
+    }
+
+    @Nullable
+    static Engine fromValue(int value) {
+        Engine[] list = Engine.values();
+        for (Engine action : list) {
+            if (action.value() == value) {
+                return action;
+            }
+        }
+        return null;
+    }
+}

cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java

@@ -494,15 +494,13 @@ public abstract class CameraEngine implements
 
     @SuppressWarnings("unused")
     @NonNull
-    @VisibleForTesting
+    public final SizeSelector getPictureSizeSelector() {
-    final SizeSelector getPictureSizeSelector() {
         return mPictureSizeSelector;
     }
 
     @SuppressWarnings("unused")
     @NonNull
-    @VisibleForTesting
+    public final SizeSelector getVideoSizeSelector() {
-    final SizeSelector getVideoSizeSelector() {
         return mVideoSizeSelector;
     }
 

cameraview/src/main/res/values/attrs.xml

@@ -108,6 +108,11 @@
             <enum name="glSurface" value="2" />
         </attr>
 
+        <attr name="cameraEngine" format="enum">
+            <enum name="camera1" value="0" />
+            <enum name="camera2" value="1" />
+        </attr>
+
         <attr name="cameraPlaySounds" format="boolean" />
 
         <attr name="cameraVideoMaxSize" format="float" />