Refactor Previews

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

@@ -30,11 +30,6 @@ public class MockCameraPreview extends CameraPreview<View, Void> {
         return new View(context);
     }
 
-    @Override
-    Surface getSurface() {
-        return null;
-    }
-
     @Override
     Class<Void> getOutputClass() {
         return null;

cameraview/src/main/views/com/otaliastudios/cameraview/CameraPreview.java

@@ -8,12 +8,12 @@ import android.view.ViewGroup;
 
 abstract class CameraPreview<T extends View, Output> {
 
-    private final static CameraLogger LOG = CameraLogger.create(CameraPreview.class.getSimpleName());
+    protected final static CameraLogger LOG = CameraLogger.create(CameraPreview.class.getSimpleName());
 
     // Used for testing.
     Task<Void> mCropTask = new Task<>();
 
-    // This is used to notify CameraImpl to recompute its camera Preview size.
+    // This is used to notify CameraController to recompute its camera Preview size.
     // After that, CameraView will need a new layout pass to adapt to the Preview size.
     interface SurfaceCallback {
         void onSurfaceAvailable();
@@ -22,16 +22,15 @@ abstract class CameraPreview<T extends View, Output> {
 
     private SurfaceCallback mSurfaceCallback;
     private T mView;
-    private boolean mCropping;
+    protected boolean mCropping;
 
-    // As far as I can see, these are the view/surface dimensions.
-    // This live in the 'View' orientation.
-    private int mSurfaceWidth;
-    private int mSurfaceHeight;
+    // These are the surface dimensions in REF_VIEW.
+    protected int mSurfaceWidth;
+    protected int mSurfaceHeight;
 
-    // As far as I can see, these are the actual preview dimensions, as set in CameraParameters.
-    private int mDesiredWidth;
-    private int mDesiredHeight;
+    // These are the preview stream dimensions, in REF_VIEW.
+    protected int mDesiredWidth;
+    protected int mDesiredHeight;
 
     CameraPreview(Context context, ViewGroup parent, SurfaceCallback callback) {
         mView = onCreateView(context, parent);
@@ -41,8 +40,6 @@ abstract class CameraPreview<T extends View, Output> {
     @NonNull
     protected abstract T onCreateView(Context context, ViewGroup parent);
 
-    abstract Surface getSurface();
-
     @NonNull
     final T getView() {
         return mView;
@@ -57,8 +54,8 @@ abstract class CameraPreview<T extends View, Output> {
     // These must be alredy rotated, if needed, to be consistent with surface/view sizes.
     void setDesiredSize(int width, int height) {
         LOG.i("setDesiredSize:", "desiredW=", width, "desiredH=", height);
-        this.mDesiredWidth = width;
-        this.mDesiredHeight = height;
+        mDesiredWidth = width;
+        mDesiredHeight = height;
         crop();
     }
 
@@ -117,49 +114,14 @@ abstract class CameraPreview<T extends View, Output> {
      * There might still be some absolute difference (e.g. same ratio but bigger / smaller).
      * However that should be already managed by the framework.
      */
-    private final void crop() {
+    protected void crop() {
+        // The base implementation does not support cropping.
         mCropTask.start();
-
-        if (!supportsCropping()) {
-            mCropTask.end(null);
-            return;
-        };
-
-        getView().post(new Runnable() {
-            @Override
-            public void run() {
-                if (mDesiredHeight == 0 || mDesiredWidth == 0 ||
-                        mSurfaceHeight == 0 || mSurfaceWidth == 0) {
         mCropTask.end(null);
-                    return;
-                }
-
-                float scaleX = 1f, scaleY = 1f;
-                AspectRatio current = AspectRatio.of(mSurfaceWidth, mSurfaceHeight);
-                AspectRatio target = AspectRatio.of(mDesiredWidth, mDesiredHeight);
-                if (current.toFloat() >= target.toFloat()) {
-                    // We are too short. Must increase height.
-                    scaleY = current.toFloat() / target.toFloat();
-                } else {
-                    // We must increase width.
-                    scaleX = target.toFloat() / current.toFloat();
-                }
-                applyCrop(scaleX, scaleY);
-                mCropping = scaleX > 1.02f || scaleY > 1.02f;
-                LOG.i("crop:", "applied scaleX=", scaleX);
-                LOG.i("crop:", "applied scaleY=", scaleY);
-                mCropTask.end(null);
-            }
-        });
-    }
-
-    protected void applyCrop(float scaleX, float scaleY) {
-        getView().setScaleX(scaleX);
-        getView().setScaleY(scaleY);
     }
 
     boolean supportsCropping() {
-        return true;
+        return false;
     }
 
     /**

cameraview/src/main/views/com/otaliastudios/cameraview/SurfaceCameraPreview.java

@@ -63,11 +63,6 @@ class SurfaceCameraPreview extends CameraPreview<View, SurfaceHolder> {
         return root.findViewById(R.id.surface_view_root);
     }
 
-    @Override
-    Surface getSurface() {
-        return getOutput().getSurface();
-    }
-
     @Override
     SurfaceHolder getOutput() {
         return mSurfaceView.getHolder();
@@ -78,12 +73,6 @@ class SurfaceCameraPreview extends CameraPreview<View, SurfaceHolder> {
         return SurfaceHolder.class;
     }
 
-    @Override
-    boolean supportsCropping() {
-        return false;
-    }
-
-    @Override
     protected void applyCrop(float scaleX, float scaleY) {
         /* float currWidth = getView().getWidth();
         float currHeight = getView().getHeight();

cameraview/src/main/views/com/otaliastudios/cameraview/TextureCameraPreview.java

@@ -12,8 +12,6 @@ import android.view.ViewGroup;
 
 class TextureCameraPreview extends CameraPreview<TextureView, SurfaceTexture> {
 
-    private Surface mSurface;
-
     TextureCameraPreview(Context context, ViewGroup parent, SurfaceCallback callback) {
         super(context, parent, callback);
     }
@@ -49,14 +47,6 @@ class TextureCameraPreview extends CameraPreview<TextureView, SurfaceTexture> {
         return texture;
     }
 
-    @Override
-    Surface getSurface() {
-        if (mSurface == null) { // Check if valid?
-            mSurface = new Surface(getOutput());
-        }
-        return mSurface;
-    }
-
     @Override
     Class<SurfaceTexture> getOutputClass() {
         return SurfaceTexture.class;
@@ -76,4 +66,41 @@ class TextureCameraPreview extends CameraPreview<TextureView, SurfaceTexture> {
         }
     }
 
+    @Override
+    boolean supportsCropping() {
+        return true;
+    }
+
+    @Override
+    protected void crop() {
+        mCropTask.start();
+        getView().post(new Runnable() {
+            @Override
+            public void run() {
+                if (mDesiredHeight == 0 || mDesiredWidth == 0 ||
+                        mSurfaceHeight == 0 || mSurfaceWidth == 0) {
+                    mCropTask.end(null);
+                    return;
+                }
+                float scaleX = 1f, scaleY = 1f;
+                AspectRatio current = AspectRatio.of(mSurfaceWidth, mSurfaceHeight);
+                AspectRatio target = AspectRatio.of(mDesiredWidth, mDesiredHeight);
+                if (current.toFloat() >= target.toFloat()) {
+                    // We are too short. Must increase height.
+                    scaleY = current.toFloat() / target.toFloat();
+                } else {
+                    // We must increase width.
+                    scaleX = target.toFloat() / current.toFloat();
+                }
+
+                getView().setScaleX(scaleX);
+                getView().setScaleY(scaleY);
+
+                mCropping = scaleX > 1.02f || scaleY > 1.02f;
+                LOG.i("crop:", "applied scaleX=", scaleX);
+                LOG.i("crop:", "applied scaleY=", scaleY);
+                mCropTask.end(null);
+            }
+        });
+    }
 }