Heavy refactoring, setParameters bug fixed

camerakit/src/main/api16/com/flurgle/camerakit/Camera1.java

@@ -8,11 +8,10 @@ import android.media.MediaRecorder;
 import android.os.Build;
 import android.os.Handler;
 import android.support.annotation.NonNull;
-import android.util.Log;
 import android.support.annotation.Nullable;
+import android.util.Log;
 import android.view.MotionEvent;
 import android.view.SurfaceHolder;
-import android.view.View;
 
 import java.io.File;
 import java.io.IOException;
@@ -38,9 +37,7 @@ class Camera1 extends CameraImpl {
 
     private int mCameraId;
     private Camera mCamera;
-    private Camera.Parameters mCameraParameters;
     private ExtraProperties mExtraProperties;
-    private Camera.CameraInfo mCameraInfo;
     private Size mPreviewSize;
     private Size mCaptureSize;
     private MediaRecorder mMediaRecorder;
@@ -63,48 +60,60 @@ class Camera1 extends CameraImpl {
     private double mLongitude;
     private boolean mFocusOnTap;
 
-    private Handler mHandler = new Handler();
+    private Handler mFocusHandler = new Handler();
     private ConstantMapper.MapperImpl mMapper = new ConstantMapper.Mapper1();
+    private boolean mIsSetup = false;
+    private final Object mLock = new Object();
 
-    Camera1(CameraView.CameraListenerWrapper callback, PreviewImpl preview) {
-        super(callback, preview);
-        preview.setCallback(new PreviewImpl.OnPreviewSurfaceChangedCallback() {
-            @Override
-            public void onPreviewSurfaceChanged() {
-                if (mCamera != null) {
-                    setupPreview();
-                    computeCameraSizes();
-                    adjustCameraParameters();
-                }
-            }
-        });
-
-        mCameraInfo = new Camera.CameraInfo();
 
+    Camera1(CameraView.CameraListenerWrapper callback, final PreviewImpl preview) {
+        super(callback, preview);
     }
 
-    // CameraImpl:
+    /**
-
+     * Preview surface is now available. If camera is open, set up.
+     */
     @Override
-    void start() {
+    public void onSurfaceAvailable() {
-        setFacing(mFacing);
+        Log.e(TAG, "onSurfaceAvailable, size is "+mPreview.getSurfaceSize());
-        openCamera();
+        if (shouldSetup()) setup();
-        if (mPreview.isReady()) setupPreview();
-        mCamera.startPreview();
     }
 
+    /**
+     * Preview surface did change its size. Compute a new preview size.
+     * This requires stopping and restarting the preview.
+     */
     @Override
-    void stop() {
+    public void onSurfaceChanged() {
-        if (mCamera != null) mCamera.stopPreview();
+        Log.e(TAG, "onSurfaceChanged, size is "+mPreview.getSurfaceSize());
-        mHandler.removeCallbacksAndMessages(null);
+        if (mIsSetup) {
-        releaseCamera();
+            // Compute a new camera preview size.
+            Size newSize = computePreviewSize();
+            if (!newSize.equals(mPreviewSize)) {
+                mPreviewSize = newSize;
+                synchronized (mLock) {
+                    mCamera.stopPreview();
+                    Camera.Parameters params = mCamera.getParameters();
+                    params.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
+                    mCamera.setParameters(params);
+                }
+                boolean invertPreviewSizes = shouldFlipSizes();
+                mPreview.setDesiredSize(
+                        invertPreviewSizes ? mPreviewSize.getHeight() : mPreviewSize.getWidth(),
+                        invertPreviewSizes ? mPreviewSize.getWidth() : mPreviewSize.getHeight()
+                );
+                mCamera.startPreview();
+            }
+        }
     }
 
-    /**
+    private boolean shouldSetup() {
-     * Sets the output stream for our preview.
+        return isCameraOpened() && mPreview.isReady() && !mIsSetup;
-     * To be called when preview is ready.
+    }
-     */
+
-    private void setupPreview() {
+    // The act of binding an "open" camera to a "ready" preview.
+    // These can happen at different times but we want to end up here.
+    private void setup() {
         try {
             if (mPreview.getOutputClass() == SurfaceHolder.class) {
                 mCamera.setPreviewDisplay(mPreview.getSurfaceHolder());
@@ -114,9 +123,79 @@ class Camera1 extends CameraImpl {
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
+
+        boolean invertPreviewSizes = shouldFlipSizes(); // mDisplayOffset % 180 != 0;
+        mCaptureSize = computeCaptureSize();
+        mPreviewSize = computePreviewSize();
+        mPreview.setDesiredSize(
+                invertPreviewSizes ? mPreviewSize.getHeight() : mPreviewSize.getWidth(),
+                invertPreviewSizes ? mPreviewSize.getWidth() : mPreviewSize.getHeight()
+        );
+        synchronized (mLock) {
+            Camera.Parameters params = mCamera.getParameters();
+            params.setPreviewSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
+            params.setPictureSize(mCaptureSize.getWidth(), mCaptureSize.getHeight()); // <- not allowed during preview
+            mCamera.setParameters(params);
+        }
+        mCamera.startPreview();
+        mIsSetup = true;
+    }
+
+
+    @Override
+    void start() {
+        if (isCameraOpened()) stop();
+        if (collectCameraId()) {
+            mCamera = Camera.open(mCameraId);
+            mCameraListener.onCameraOpened();
+
+            // Set parameters that might have been set before the camera was opened.
+            synchronized (mLock) {
+                Camera.Parameters params = mCamera.getParameters();
+                mergeFocus(params, mFocus);
+                mergeFlash(params, mFlash);
+                mergeLocation(params, mLatitude, mLongitude);
+                mergeWhiteBalance(params, mWhiteBalance);
+                params.setRecordingHint(mSessionType == SESSION_TYPE_VIDEO);
+                mCamera.setParameters(params);
+            }
+
+            // Try starting preview.
+            mCamera.setDisplayOrientation(computeCameraToDisplayOffset()); // <- not allowed during preview
+            if (shouldSetup()) setup();
+            collectExtraProperties();
+        }
     }
 
 
+    @Override
+    void stop() {
+        mFocusHandler.removeCallbacksAndMessages(null);
+        if (isCameraOpened()) {
+            mCamera.stopPreview();
+            mCamera.release();
+            mCameraListener.onCameraClosed();
+        }
+        mCamera = null;
+        mPreviewSize = null;
+        mCaptureSize = null;
+        mIsSetup = false;
+    }
+
+    private boolean collectCameraId() {
+        int internalFacing = mMapper.mapFacing(mFacing);
+        Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
+        for (int i = 0, count = Camera.getNumberOfCameras(); i < count; i++) {
+            Camera.getCameraInfo(i, cameraInfo);
+            if (cameraInfo.facing == internalFacing) {
+                mSensorOffset = cameraInfo.orientation;
+                mCameraId = i;
+                return true;
+            }
+        }
+        return false;
+    }
+
     @Override
     void onDisplayOffset(int displayOrientation) {
         // I doubt this will ever change.
@@ -134,7 +213,6 @@ class Camera1 extends CameraImpl {
         if (sessionType != mSessionType) {
             mSessionType = sessionType;
             if (isCameraOpened()) {
-                stop();
                 start();
             }
         }
@@ -142,119 +220,129 @@ class Camera1 extends CameraImpl {
 
     @Override
     void setLocation(double latitude, double longitude) {
+        double oldLat = mLatitude;
+        double oldLong = mLongitude;
         mLatitude = latitude;
         mLongitude = longitude;
-        if (mCameraParameters != null) {
+        if (isCameraOpened()) {
-            // Sometimes this will fail... I have no idea why.
+            synchronized (mLock) {
-            // Since native_setParameters is quite a black box, there's nothing we can do about it.
+                Camera.Parameters params = mCamera.getParameters();
-            try {
+                if (mergeLocation(params, oldLat, oldLong)) mCamera.setParameters(params);
-                mCameraParameters.setGpsLatitude(latitude);
-                mCameraParameters.setGpsLongitude(longitude);
-                // mCameraParameters.setGpsAltitude(0);
-                // mCameraParameters.setGpsTimestamp(System.currentTimeMillis());
-                // mCameraParameters.setGpsProcessingMethod("GPS");
-                mCamera.setParameters(mCameraParameters);
-            } catch (Exception e) {
-                // Reset or everything after will throw as well.
-                e.printStackTrace();
-                mCameraParameters = mCamera.getParameters();
             }
         }
     }
 
+    private boolean mergeLocation(Camera.Parameters params, double oldLatitude, double oldLongitude) {
+        if (mLatitude != 0 && mLongitude != 0) {
+            params.setGpsLatitude(mLatitude);
+            params.setGpsLongitude(mLongitude);
+            params.setGpsTimestamp(System.currentTimeMillis());
+            params.setGpsProcessingMethod("Unknown");
+        }
+        return true;
+    }
+
     @Override
     void setFacing(@Facing int facing) {
-        int internalFacing = mMapper.mapFacing(facing);
+        if (facing != mFacing) {
-        for (int i = 0, count = Camera.getNumberOfCameras(); i < count; i++) {
+            mFacing = facing;
-            Camera.getCameraInfo(i, mCameraInfo);
+            if (collectCameraId() && isCameraOpened()) {
-            if (mCameraInfo.facing == internalFacing) {
+                start();
-                mSensorOffset = mCameraInfo.orientation;
-                mCameraId = i;
-                mFacing = facing;
-                break;
             }
         }
-
-        if (mFacing == facing && isCameraOpened()) {
-            stop();
-            start();
-        }
     }
 
     @Override
     void setWhiteBalance(@WhiteBalance int whiteBalance) {
         int old = mWhiteBalance;
         mWhiteBalance = whiteBalance;
-        if (mCameraParameters != null) {
+        if (isCameraOpened()) {
-            List<String> supported = mCameraParameters.getSupportedWhiteBalance();
+            synchronized (mLock) {
-            String internal = mMapper.mapWhiteBalance(whiteBalance);
+                Camera.Parameters params = mCamera.getParameters();
-            if (supported != null && supported.contains(internal)) {
+                if (mergeWhiteBalance(params, old)) mCamera.setParameters(params);
-                mCameraParameters.setWhiteBalance(internal);
-                mCamera.setParameters(mCameraParameters);
-            } else {
-                mWhiteBalance = old;
             }
         }
     }
 
+    private boolean mergeWhiteBalance(Camera.Parameters params, @WhiteBalance int oldWhiteBalance) {
+        List<String> supported = params.getSupportedWhiteBalance();
+        String internal = mMapper.mapWhiteBalance(mWhiteBalance);
+        if (supported != null && supported.contains(internal)) {
+            params.setWhiteBalance(internal);
+            return true;
+        }
+        mWhiteBalance = oldWhiteBalance;
+        return false;
+    }
+
     @Override
     void setFlash(@Flash int flash) {
         int old = mFlash;
         mFlash = flash;
-        if (mCameraParameters != null) {
+        if (isCameraOpened()) {
-            List<String> flashes = mCameraParameters.getSupportedFlashModes();
+            synchronized (mLock) {
-            String internalFlash = mMapper.mapFlash(flash);
+                Camera.Parameters params = mCamera.getParameters();
-            if (flashes != null && flashes.contains(internalFlash)) {
+                if (mergeFlash(params, old)) mCamera.setParameters(params);
-                mCameraParameters.setFlashMode(internalFlash);
-                mCamera.setParameters(mCameraParameters);
-            } else {
-                mFlash = old;
             }
         }
     }
 
 
+    private boolean mergeFlash(Camera.Parameters params, @Flash int oldFlash) {
+        List<String> flashes = params.getSupportedFlashModes();
+        String internalFlash = mMapper.mapFlash(mFlash);
+        if (flashes != null && flashes.contains(internalFlash)) {
+            params.setFlashMode(internalFlash);
+            return true;
+        }
+        mFlash = oldFlash;
+        return false;
+    }
+
+
     @Override
     void setFocus(@Focus int focus) {
         int old = mFocus;
         mFocus = focus;
-        if (mCameraParameters == null) return;
+        if (isCameraOpened()) {
-        switch (focus) {
+            synchronized (mLock) {
-            case FOCUS_CONTINUOUS:
+                Camera.Parameters params = mCamera.getParameters();
-                mFocusOnTap = false;
+                if (mergeFocus(params, old)) mCamera.setParameters(params);
-                final List<String> modes = mCameraParameters.getSupportedFocusModes();
+            }
-                if (modes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
+        }
-                    mCameraParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
+        mFocusOnTap = mFocus == FOCUS_TAP || mFocus == FOCUS_TAP_WITH_MARKER;
-                } else {
+    }
-                    mFocus = old;
-                }
-                break;
 
+
+    private boolean mergeFocus(Camera.Parameters params, @Focus int oldFocus) {
+        final List<String> modes = params.getSupportedFocusModes();
+        switch (mFocus) {
+            case FOCUS_CONTINUOUS:
             case FOCUS_TAP:
             case FOCUS_TAP_WITH_MARKER:
-                mFocusOnTap = true;
+                if (modes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
-                final List<String> modes1 = mCameraParameters.getSupportedFocusModes();
+                    params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
-                if (modes1.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
+                    return true;
-                    mCameraParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
-                } else {
-                    mFocus = old;
                 }
-                break;
+                mFocus = oldFocus;
+                return false;
 
             case FOCUS_OFF:
-                mFocusOnTap = false;
+                if (modes.contains(Camera.Parameters.FOCUS_MODE_FIXED)) {
-                final List<String> modes2 = mCameraParameters.getSupportedFocusModes();
+                    params.setFocusMode(Camera.Parameters.FOCUS_MODE_FIXED);
-                if (modes2.contains(Camera.Parameters.FOCUS_MODE_FIXED)) {
+                    return true;
-                    mCameraParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_FIXED);
+                } else if (modes.contains(Camera.Parameters.FOCUS_MODE_INFINITY)) {
-                } else if (modes2.contains(Camera.Parameters.FOCUS_MODE_INFINITY)) {
+                    params.setFocusMode(Camera.Parameters.FOCUS_MODE_INFINITY);
-                    mCameraParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_INFINITY);
+                    return true;
-                } else {
+                } else if (modes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
-                    mCameraParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+                    params.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+                    return true;
                 }
-                break;
         }
+        return false;
     }
 
+
     @Override
     void setZoom(@ZoomMode int zoom) {
         this.mZoom = zoom;
@@ -263,26 +351,29 @@ class Camera1 extends CameraImpl {
     @Override
     void setVideoQuality(int videoQuality) {
         this.mVideoQuality = videoQuality;
+        // TODO: restore preview size if needed.
     }
 
     @Override
     void captureImage() {
         if (isCapturingImage) return;
-        if (mCamera == null) return;
+        if (!isCameraOpened()) return;
         switch (mSessionType) {
             case SESSION_TYPE_PICTURE:
                 // Set boolean to wait for image callback
                 isCapturingImage = true;
-                Camera.Parameters parameters = mCamera.getParameters();
+                synchronized (mLock) {
-                parameters.setRotation(computeExifOrientation());
+                    Camera.Parameters parameters = mCamera.getParameters();
-                mCamera.setParameters(parameters);
+                    parameters.setRotation(computeExifOrientation());
+                    mCamera.setParameters(parameters);
+                }
                 mCamera.takePicture(null, null, null,
                     new Camera.PictureCallback() {
                         @Override
                         public void onPictureTaken(byte[] data, Camera camera) {
                             mCameraListener.onPictureTaken(data);
                             isCapturingImage = false;
-                            camera.startPreview(); // TODO: is this needed? why?
+                            camera.startPreview(); // This is needed, read somewhere in the docs.
                         }
                     });
                 break;
@@ -297,13 +388,14 @@ class Camera1 extends CameraImpl {
                     public void onPreviewFrame(final byte[] data, Camera camera) {
                         // Got to rotate the preview frame, since byte[] data here does not include
                         // EXIF tags automatically set by camera. So either we add EXIF, or we rotate.
+                        Camera.Parameters params = mCamera.getParameters();
                         final int rotation = computeExifOrientation();
                         final boolean flip = rotation % 180 != 0;
                         final int preWidth = mPreviewSize.getWidth();
                         final int preHeight = mPreviewSize.getHeight();
                         final int postWidth = flip ? preHeight : preWidth;
                         final int postHeight = flip ? preWidth : preHeight;
-                        final int format = mCameraParameters.getPreviewFormat();
+                        final int format = params.getPreviewFormat();
                         new Thread(new Runnable() {
                             @Override
                             public void run() {
@@ -347,38 +439,13 @@ class Camera1 extends CameraImpl {
 
     // Internal:
 
-    private void openCamera() {
-        if (mCamera != null) {
-            releaseCamera();
-        }
-
-        mCamera = Camera.open(mCameraId);
-        mCameraParameters = mCamera.getParameters();
-
-        collectCameraProperties();
-        computeCameraSizes();
-        adjustCameraParameters();
-        mCamera.setDisplayOrientation(computeCameraToDisplayOffset());
-        mCameraListener.onCameraOpened();
-    }
-
-    private void releaseCamera() {
-        if (mCamera != null) {
-            mCamera.release();
-            mCamera = null;
-            mCameraParameters = null;
-            mPreviewSize = null;
-            mCaptureSize = null;
-            mCameraListener.onCameraClosed();
-        }
-    }
 
     /**
      * Returns how much should the sensor image be rotated before being shown.
      * It is meant to be fed to Camera.setDisplayOrientation().
      */
     private int computeCameraToDisplayOffset() {
-        if (mCameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
+        if (mFacing == CameraKit.Constants.FACING_FRONT) {
             // or: (360 - ((info.orientation + displayOrientation) % 360)) % 360;
             return ((mSensorOffset - mDisplayOffset) + 360 + 180) % 360;
         } else {
@@ -399,45 +466,35 @@ class Camera1 extends CameraImpl {
      * This is called either on cameraView.start(), or when the underlying surface changes.
      * It is possible that in the first call the preview surface has not already computed its
      * dimensions.
-     * But when it does, the {@link PreviewImpl.OnPreviewSurfaceChangedCallback} should be called,
+     * But when it does, the {@link PreviewImpl.SurfaceCallback} should be called,
      * and this should be refreshed.
      */
-    private void computeCameraSizes() {
+    private Size computeCaptureSize() {
-        mCameraParameters.setRecordingHint(mSessionType == SESSION_TYPE_VIDEO);
+        Camera.Parameters params = mCamera.getParameters();
-        List<Size> previewSizes = sizesFromList(mCameraParameters.getSupportedPreviewSizes());
         if (mSessionType == SESSION_TYPE_PICTURE) {
             // Choose the max size.
-            List<Size> captureSizes = sizesFromList(mCameraParameters.getSupportedPictureSizes());
+            List<Size> captureSizes = sizesFromList(params.getSupportedPictureSizes());
-            mCaptureSize = Collections.max(captureSizes);
+            return Collections.max(captureSizes);
         } else {
             // Choose according to developer choice in setVideoQuality.
             // The Camcorder internally checks for cameraParameters.getSupportedVideoSizes() etc.
             // So its output is our output.
             CamcorderProfile camcorderProfile = getCamcorderProfile(mVideoQuality);
-            mCaptureSize = new Size(camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight);
+            return new Size(camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight);
         }
-        mPreviewSize = computePreviewSize(previewSizes, mCaptureSize, mPreview.getSurfaceSize());
-        // Log.e("Camera1", "CaptureSize is "+mCaptureSize.toString());
-        // Log.e("Camera1", "PreviewSize is "+mPreviewSize.toString());
     }
 
-    private void adjustCameraParameters() {
+    private Size computePreviewSize() {
-        boolean invertPreviewSizes = shouldFlipSizes(); // mDisplayOffset % 180 != 0;
+        Camera.Parameters params = mCamera.getParameters();
-        mPreview.setDesiredSize(
+        List<Size> previewSizes = sizesFromList(params.getSupportedPreviewSizes());
-                invertPreviewSizes ? getPreviewSize().getHeight() : getPreviewSize().getWidth(),
+        return computePreviewSize(previewSizes, mCaptureSize, mPreview.getSurfaceSize());
-                invertPreviewSizes ? getPreviewSize().getWidth() : getPreviewSize().getHeight()
-        );
-        mCameraParameters.setPreviewSize(getPreviewSize().getWidth(), getPreviewSize().getHeight());
-        mCameraParameters.setPictureSize(getCaptureSize().getWidth(), getCaptureSize().getHeight());
-        setFocus(mFocus);
-        setFlash(mFlash);
-        setLocation(mLatitude, mLongitude);
-        mCamera.setParameters(mCameraParameters);
     }
 
-    private void collectCameraProperties() {
+
-        mExtraProperties = new ExtraProperties(mCameraParameters.getVerticalViewAngle(),
+    private void collectExtraProperties() {
-                mCameraParameters.getHorizontalViewAngle());
+        Camera.Parameters params = mCamera.getParameters();
+        mExtraProperties = new ExtraProperties(params.getVerticalViewAngle(),
+                params.getHorizontalViewAngle());
     }
 
 
@@ -546,23 +603,26 @@ class Camera1 extends CameraImpl {
         if (!mFocusOnTap) return;
         if (mCamera == null) return;
         if (event.getAction() != MotionEvent.ACTION_UP) return;
-        Camera.Parameters parameters = mCamera.getParameters();
         Rect rect = calculateFocusArea(event.getX(), event.getY());
         List<Camera.Area> meteringAreas = new ArrayList<>();
         meteringAreas.add(new Camera.Area(rect, getFocusMeteringAreaWeight()));
 
-        boolean autofocusSupported = parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_AUTO);
+        synchronized (mLock) {
-        if (autofocusSupported) {
+            Camera.Parameters parameters = mCamera.getParameters();
-            if (parameters.getMaxNumFocusAreas() > 0) parameters.setFocusAreas(meteringAreas);
+            boolean autofocusSupported = parameters.getSupportedFocusModes().contains(Camera.Parameters.FOCUS_MODE_AUTO);
-            if (parameters.getMaxNumMeteringAreas() > 0) parameters.setMeteringAreas(meteringAreas);
+            if (autofocusSupported) {
-            parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
+                if (parameters.getMaxNumFocusAreas() > 0) parameters.setFocusAreas(meteringAreas);
-            mCamera.setParameters(parameters);
+                if (parameters.getMaxNumMeteringAreas() > 0)
-            mCamera.autoFocus(new Camera.AutoFocusCallback() {
+                    parameters.setMeteringAreas(meteringAreas);
-                @Override
+                parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
-                public void onAutoFocus(boolean success, Camera camera) {
+                mCamera.setParameters(parameters);
-                    resetFocus(success, camera);
+                mCamera.autoFocus(new Camera.AutoFocusCallback() {
-                }
+                    @Override
-            });
+                    public void onAutoFocus(boolean success, Camera camera) {
+                        resetFocus(success, camera);
+                    }
+                });
+            }
         }
     }
 
@@ -578,18 +638,20 @@ class Camera1 extends CameraImpl {
 
 
     private void resetFocus(final boolean success, final Camera camera) {
-        mHandler.removeCallbacksAndMessages(null);
+        mFocusHandler.removeCallbacksAndMessages(null);
-        mHandler.postDelayed(new Runnable() {
+        mFocusHandler.postDelayed(new Runnable() {
             @Override
             public void run() {
                 if (camera != null) {
                     camera.cancelAutoFocus();
-                    Camera.Parameters params = camera.getParameters();
+                    synchronized (mLock) {
-                    if (!params.getFocusMode().equals(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
+                        Camera.Parameters params = camera.getParameters();
-                        params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
+                        if (!params.getFocusMode().equals(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
-                        params.setFocusAreas(null);
+                            params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
-                        params.setMeteringAreas(null);
+                            params.setFocusAreas(null);
-                        camera.setParameters(params);
+                            params.setMeteringAreas(null);
+                            mCamera.setParameters(params);
+                        }
                     }
 
                     if (mAutofocusCallback != null) mAutofocusCallback.onAutoFocus(success, camera);

camerakit/src/main/api21/com/flurgle/camerakit/Camera2.java

@@ -37,15 +37,18 @@ class Camera2 extends CameraImpl {
     private ConstantMapper.MapperImpl mMapper = new ConstantMapper.Mapper2();
     private final HashMap<String, ExtraProperties> mExtraPropertiesMap = new HashMap<>();
 
-    Camera2(CameraView.CameraListenerWrapper callback, PreviewImpl preview, Context context) {
+    @Override
-        super(callback, preview);
+    public void onSurfaceChanged() {
-        preview.setCallback(new PreviewImpl.OnPreviewSurfaceChangedCallback() {
-            @Override
-            public void onPreviewSurfaceChanged() {
 
-            }
+    }
-        });
 
+    @Override
+    public void onSurfaceAvailable() {
+
+    }
+
+    Camera2(CameraView.CameraListenerWrapper callback, PreviewImpl preview, Context context) {
+        super(callback, preview);
         mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
 
         // Get all view angles

camerakit/src/main/base/com/flurgle/camerakit/CameraImpl.java

@@ -6,7 +6,7 @@ import android.view.MotionEvent;
 
 import java.io.File;
 
-abstract class CameraImpl {
+abstract class CameraImpl implements PreviewImpl.SurfaceCallback {
 
     protected final CameraView.CameraListenerWrapper mCameraListener;
     protected final PreviewImpl mPreview;
@@ -14,6 +14,7 @@ abstract class CameraImpl {
     CameraImpl(CameraView.CameraListenerWrapper callback, PreviewImpl preview) {
         mCameraListener = callback;
         mPreview = preview;
+        mPreview.setSurfaceCallback(this);
     }
 
     abstract void start();

camerakit/src/main/base/com/flurgle/camerakit/PreviewImpl.java

@@ -7,11 +7,12 @@ import android.view.View;
 
 abstract class PreviewImpl {
 
-    interface OnPreviewSurfaceChangedCallback {
+    interface SurfaceCallback {
-        void onPreviewSurfaceChanged();
+        void onSurfaceAvailable();
+        void onSurfaceChanged();
     }
 
-    private OnPreviewSurfaceChangedCallback mOnPreviewSurfaceChangedCallback;
+    private SurfaceCallback mSurfaceCallback;
 
     // As far as I can see, these are the view/surface dimensions.
     // This live in the 'View' orientation.
@@ -22,8 +23,8 @@ abstract class PreviewImpl {
     private int mDesiredWidth;
     private int mDesiredHeight;
 
-    void setCallback(OnPreviewSurfaceChangedCallback callback) {
+    void setSurfaceCallback(SurfaceCallback callback) {
-        mOnPreviewSurfaceChangedCallback = callback;
+        mSurfaceCallback = callback;
     }
 
     abstract Surface getSurface();
@@ -37,10 +38,6 @@ abstract class PreviewImpl {
 
     abstract boolean isReady();
 
-    protected void dispatchSurfaceChanged() {
-        mOnPreviewSurfaceChangedCallback.onPreviewSurfaceChanged();
-    }
-
     SurfaceHolder getSurfaceHolder() {
         return null;
     }
@@ -49,12 +46,27 @@ abstract class PreviewImpl {
         return null;
     }
 
+    protected final void onSurfaceAvailable(int width, int height) {
+        mSurfaceWidth = width;
+        mSurfaceHeight = height;
+        refreshScale();
+        mSurfaceCallback.onSurfaceAvailable();
+    }
     // As far as I can see, these are the view/surface dimensions.
     // This is called by subclasses.
-    protected void setSurfaceSize(int width, int height) {
+    protected final void onSurfaceSizeChanged(int width, int height) {
-        this.mSurfaceWidth = width;
+        if (width != mSurfaceWidth || height != mSurfaceHeight) {
-        this.mSurfaceHeight = height;
+            mSurfaceWidth = width;
-        refreshScale(); // Refresh true preview size to adjust scaling
+            mSurfaceHeight = height;
+            refreshScale();
+            mSurfaceCallback.onSurfaceChanged();
+        }
+    }
+
+    protected final void onSurfaceDestroyed() {
+        mSurfaceWidth = 0;
+        mSurfaceHeight = 0;
+        refreshScale();
     }
 
     // As far as I can see, these are the actual preview dimensions, as set in CameraParameters.

camerakit/src/main/base/com/flurgle/camerakit/SurfaceViewPreview.java

@@ -1,12 +1,9 @@
 package com.flurgle.camerakit;
 
-import android.annotation.TargetApi;
 import android.content.Context;
-import android.graphics.SurfaceTexture;
 import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
-import android.view.TextureView;
 import android.view.View;
 import android.view.ViewGroup;
 
@@ -23,19 +20,17 @@ class SurfaceViewPreview extends PreviewImpl {
         holder.addCallback(new SurfaceHolder.Callback() {
             @Override
             public void surfaceCreated(SurfaceHolder holder) {
-                setSurfaceSize(mSurfaceView.getWidth(), mSurfaceView.getHeight());
+                onSurfaceAvailable(mSurfaceView.getWidth(), mSurfaceView.getHeight());
-                dispatchSurfaceChanged();
             }
 
             @Override
             public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
-                setSurfaceSize(width, height);
+                onSurfaceSizeChanged(width, height);
-                dispatchSurfaceChanged();
             }
 
             @Override
             public void surfaceDestroyed(SurfaceHolder holder) {
-                setSurfaceSize(0, 0);
+                onSurfaceDestroyed();
             }
         });
     }

camerakit/src/main/base/com/flurgle/camerakit/TextureViewPreview.java

@@ -21,20 +21,17 @@ class TextureViewPreview extends PreviewImpl {
 
             @Override
             public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
-                setSurfaceSize(width, height);
+                onSurfaceAvailable(width, height);
-                dispatchSurfaceChanged();
             }
 
             @Override
             public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-                setSurfaceSize(width, height);
+                onSurfaceSizeChanged(width, height);
-                dispatchSurfaceChanged();
-                // refreshScale();
             }
 
             @Override
             public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
-                setSurfaceSize(0, 0);
+                onSurfaceDestroyed();
                 return true;
             }
 

camerakit/src/main/java/com/flurgle/camerakit/CameraView.java

@@ -203,12 +203,14 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         if (!mAdjustViewBounds) {
+            Log.e(TAG, "onMeasure, adjustViewBounds=false");
             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
             return;
         }
 
         Size previewSize = getPreviewSize();
         if (previewSize == null) { // Early measure.
+            Log.e(TAG, "onMeasure, early measure");
             super.onMeasure(widthMeasureSpec, heightMeasureSpec);
             return;
         }
@@ -218,21 +220,18 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
         boolean flip = mCameraImpl.shouldFlipSizes();
         float previewWidth = flip ? previewSize.getHeight() : previewSize.getWidth();
         float previewHeight = flip ? previewSize.getWidth() : previewSize.getHeight();
+        float parentHeight = MeasureSpec.getSize(heightMeasureSpec);
+        float parentWidth = MeasureSpec.getSize(widthMeasureSpec); // mode = AT_MOST
+        Log.e(TAG, "onMeasure, parent size is "+new Size((int)parentWidth, (int)parentHeight)); // 1080x1794
+        Log.e(TAG, "onMeasure, surface size is "+new Size((int)previewWidth, (int)previewHeight)); // 1600x1200
 
         if (wwc && hwc) {
             // If both dimensions are WRAP_CONTENT, let's try to fit the preview size perfectly
             // without cropping.
             // TODO: This should actually be a flag, like scaleMode, that replaces cropOutput and adjustViewBounds.
             // This is like a fitCenter.
-
-            // preview: 1600x1200
-            // parent:  1080x1794
-            float parentHeight = MeasureSpec.getSize(heightMeasureSpec);
-            float parentWidth = MeasureSpec.getSize(widthMeasureSpec); // mode = AT_MOST
             float targetRatio = previewHeight / previewWidth;
             float currentRatio = parentHeight / parentWidth;
-            Log.e(TAG, "parentHeight="+parentHeight+", parentWidth="+parentWidth);
-            Log.e(TAG, "previewHeight="+previewHeight+", previewWidth="+previewWidth);
             if (currentRatio > targetRatio) {
                 // View is too tall. Must reduce height.
                 int newHeight = (int) (parentWidth * targetRatio);

demo/src/main/AndroidManifest.xml

@@ -22,8 +22,9 @@
         </activity>
 
         <activity
-            android:name=".PreviewActivity"
+            android:name=".PicturePreviewActivity" />
-            android:screenOrientation="portrait" />
+
+        <activity android:name=".VideoPreviewActivity"/>
 
     </application>
 

demo/src/main/java/com/flurgle/camerakit/demo/MainActivity.java

@@ -3,6 +3,7 @@ package com.flurgle.camerakit.demo;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
@@ -34,8 +35,8 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
 
     // Capture Mode:
 
-    @BindView(R.id.captureModeRadioGroup)
+    @BindView(R.id.sessionTypeRadioGroup)
-    RadioGroup captureModeRadioGroup;
+    RadioGroup sessionTypeRadioGroup;
 
     // Crop Mode:
 
@@ -84,7 +85,7 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
 
         camera.addOnLayoutChangeListener(this);
 
-        captureModeRadioGroup.setOnCheckedChangeListener(captureModeChangedListener);
+        sessionTypeRadioGroup.setOnCheckedChangeListener(sessionTypeChangedListener);
         cropModeRadioGroup.setOnCheckedChangeListener(cropModeChangedListener);
         widthModeRadioGroup.setOnCheckedChangeListener(widthModeChangedListener);
         heightModeRadioGroup.setOnCheckedChangeListener(heightModeChangedListener);
@@ -122,12 +123,8 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
                 Bitmap bitmap = BitmapFactory.decodeByteArray(jpeg, 0, jpeg.length);
                 ResultHolder.dispose();
                 ResultHolder.setImage(bitmap);
-                ResultHolder.setNativeCaptureSize(
-                        captureModeRadioGroup.getCheckedRadioButtonId() == R.id.modeCaptureStandard ?
-                                camera.getCaptureSize() : camera.getPreviewSize()
-                );
                 ResultHolder.setTimeToCallback(callbackTime - startTime);
-                Intent intent = new Intent(MainActivity.this, PreviewActivity.class);
+                Intent intent = new Intent(MainActivity.this, PicturePreviewActivity.class);
                 startActivity(intent);
             }
         });
@@ -136,6 +133,10 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
 
     @OnClick(R.id.captureVideo)
     void captureVideo() {
+        if (camera.getSessionType() != CameraKit.Constants.SESSION_TYPE_VIDEO) {
+            Toast.makeText(this, "Can't record video while session type is 'picture'.", Toast.LENGTH_SHORT).show();
+            return;
+        }
         if (mCapturing) return;
         mCapturing = true;
         camera.setCameraListener(new CameraListener() {
@@ -143,16 +144,20 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
             public void onVideoTaken(File video) {
                 super.onVideoTaken(video);
                 mCapturing = false;
+                ResultHolder.dispose();
+                ResultHolder.setVideo(Uri.fromFile(video));
+                Intent intent = new Intent(MainActivity.this, VideoPreviewActivity.class);
+                startActivity(intent);
             }
         });
-        Toast.makeText(this, "Recording for 3 seconds...", Toast.LENGTH_LONG).show();
+        Toast.makeText(this, "Recording for 8 seconds...", Toast.LENGTH_LONG).show();
         camera.startCapturingVideo(null);
         camera.postDelayed(new Runnable() {
             @Override
             public void run() {
                 camera.stopCapturingVideo();
             }
-        }, 3000);
+        }, 8000);
     }
 
     @OnClick(R.id.toggleCamera)
@@ -188,16 +193,16 @@ public class MainActivity extends AppCompatActivity implements View.OnLayoutChan
         }
     }
 
-    RadioGroup.OnCheckedChangeListener captureModeChangedListener = new RadioGroup.OnCheckedChangeListener() {
+    RadioGroup.OnCheckedChangeListener sessionTypeChangedListener = new RadioGroup.OnCheckedChangeListener() {
         @Override
         public void onCheckedChanged(RadioGroup group, int checkedId) {
             if (mCapturing) return;
             camera.setSessionType(
-                    checkedId == R.id.modeCaptureStandard ?
+                    checkedId == R.id.sessionTypePicture ?
                             CameraKit.Constants.SESSION_TYPE_PICTURE :
                             CameraKit.Constants.SESSION_TYPE_VIDEO
             );
-            Toast.makeText(MainActivity.this, "Session type set to" + (checkedId == R.id.modeCaptureStandard ? " picture!" : " video!"), Toast.LENGTH_SHORT).show();
+            Toast.makeText(MainActivity.this, "Session type set to" + (checkedId == R.id.sessionTypePicture ? " picture!" : " video!"), Toast.LENGTH_SHORT).show();
         }
     };
 

demo/src/main/java/com/flurgle/camerakit/demo/PicturePreviewActivity.java

@@ -13,7 +13,7 @@ import com.flurgle.camerakit.Size;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 
-public class PreviewActivity extends Activity {
+public class PicturePreviewActivity extends Activity {
 
     @BindView(R.id.image)
     ImageView imageView;
@@ -33,7 +33,7 @@ public class PreviewActivity extends Activity {
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_preview);
+        setContentView(R.layout.activity_picture_preview);
         ButterKnife.bind(this);
 
         Bitmap bitmap = ResultHolder.getImage();
@@ -44,12 +44,10 @@ public class PreviewActivity extends Activity {
 
         imageView.setImageBitmap(bitmap);
 
-        Size captureSize = ResultHolder.getNativeCaptureSize();
+        // Native sizes are landscape, activity might now. <- not clear what this means but OK
-        if (captureSize != null) {
+        // TODO: ncr and ar might be different when cropOutput is true.
-            // Native sizes are landscape, hardcode flip because demo app forced to portrait.
+        AspectRatio aspectRatio = AspectRatio.of(bitmap.getHeight(), bitmap.getWidth());
-            AspectRatio aspectRatio = AspectRatio.of(captureSize.getHeight(), captureSize.getWidth());
+        nativeCaptureResolution.setText(bitmap.getHeight() + " x " + bitmap.getWidth() + " (" + aspectRatio.toString() + ")");
-            nativeCaptureResolution.setText(captureSize.getHeight() + " x " + captureSize.getWidth() + " (" + aspectRatio.toString() + ")");
-        }
 
         actualResolution.setText(bitmap.getWidth() + " x " + bitmap.getHeight());
         approxUncompressedSize.setText(getApproximateFileMegabytes(bitmap) + "MB");

demo/src/main/java/com/flurgle/camerakit/demo/ResultHolder.java

@@ -1,6 +1,7 @@
 package com.flurgle.camerakit.demo;
 
 import android.graphics.Bitmap;
+import android.net.Uri;
 import android.support.annotation.Nullable;
 
 import com.flurgle.camerakit.Size;
@@ -12,24 +13,24 @@ public class ResultHolder {
     private static WeakReference<Bitmap> image;
     private static Size nativeCaptureSize;
     private static long timeToCallback;
+    private static Uri video;
 
 
-    public static void setImage(@Nullable Bitmap image) {
+    public static Uri getVideo() {
-        ResultHolder.image = image != null ? new WeakReference<>(image) : null;
+        return video;
     }
 
-    @Nullable
+    public static void setVideo(Uri video) {
-    public static Bitmap getImage() {
+        ResultHolder.video = video;
-        return image != null ? image.get() : null;
     }
 
-    public static void setNativeCaptureSize(@Nullable Size nativeCaptureSize) {
+    public static void setImage(@Nullable Bitmap image) {
-        ResultHolder.nativeCaptureSize = nativeCaptureSize;
+        ResultHolder.image = image != null ? new WeakReference<>(image) : null;
     }
 
     @Nullable
-    public static Size getNativeCaptureSize() {
+    public static Bitmap getImage() {
-        return nativeCaptureSize;
+        return image != null ? image.get() : null;
     }
 
     public static void setTimeToCallback(long timeToCallback) {
@@ -42,7 +43,7 @@ public class ResultHolder {
 
     public static void dispose() {
         setImage(null);
-        setNativeCaptureSize(null);
+        setVideo(null);
         setTimeToCallback(0);
     }
 

demo/src/main/java/com/flurgle/camerakit/demo/VideoPreviewActivity.java

@@ -0,0 +1,63 @@
+package com.flurgle.camerakit.demo;
+
+import android.app.Activity;
+import android.graphics.Bitmap;
+import android.media.MediaPlayer;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.MediaController;
+import android.widget.TextView;
+import android.widget.VideoView;
+
+import com.flurgle.camerakit.AspectRatio;
+import com.flurgle.camerakit.Size;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+
+public class VideoPreviewActivity extends Activity {
+
+    @BindView(R.id.video)
+    VideoView videoView;
+
+    @BindView(R.id.actualResolution)
+    TextView actualResolution;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_video_preview);
+        ButterKnife.bind(this);
+
+        Uri videoUri = ResultHolder.getVideo();
+        if (videoUri == null) {
+            finish();
+            return;
+        }
+
+        MediaController controller = new MediaController(this);
+        controller.setAnchorView(videoView);
+        controller.setMediaPlayer(videoView);
+        videoView.setMediaController(controller);
+        videoView.setVideoURI(videoUri);
+
+        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
+            @Override
+            public void onPrepared(MediaPlayer mp) {
+                actualResolution.setText(mp.getVideoWidth() + " x " + mp.getVideoHeight());
+            }
+        });
+        playVideo();
+    }
+
+
+    @OnClick(R.id.video)
+    void playVideo() {
+        if (videoView.isPlaying()) return;
+        videoView.start();
+    }
+}

demo/src/main/res/layout/activity_main.xml

@@ -43,7 +43,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal"
-                android:weightSum="3">
+                android:weightSum="4">
 
                 <ImageButton
                     android:id="@+id/capturePhoto"
@@ -113,31 +113,31 @@
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:layout_marginLeft="3dp"
-                        android:text="CAPTURE METHOD"
+                        android:text="SESSION TYPE"
                         android:textColor="@android:color/black"
                         android:textSize="14sp"
                         android:textStyle="bold" />
 
                     <RadioGroup
-                        android:id="@+id/captureModeRadioGroup"
+                        android:id="@+id/sessionTypeRadioGroup"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_marginTop="4dp"
-                        android:checkedButton="@+id/modeCaptureStandard"
+                        android:checkedButton="@+id/sessionTypePicture"
                         android:orientation="horizontal">
 
                         <RadioButton
-                            android:id="@+id/modeCaptureStandard"
+                            android:id="@+id/sessionTypePicture"
                             android:layout_width="wrap_content"
                             android:layout_height="wrap_content"
-                            android:text="Standard" />
+                            android:text="Picture" />
 
                         <RadioButton
-                            android:id="@+id/modeCaptureStill"
+                            android:id="@+id/sessionTypeVideo"
                             android:layout_width="wrap_content"
                             android:layout_height="wrap_content"
                             android:layout_marginLeft="10dp"
-                            android:text="Still" />
+                            android:text="Video" />
 
                     </RadioGroup>
 

demo/src/main/res/layout/activity_video_preview.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <VideoView
+        android:id="@+id/video"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="100dp"
+        android:layout_gravity="bottom"
+        android:gravity="center_vertical"
+        android:background="@android:color/white"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            android:text="ACTUAL RESOLUTION"
+            android:textColor="@android:color/black"
+            android:textSize="18sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/actualResolution"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            android:textColor="@android:color/black"
+            android:textSize="14.5sp" />
+
+    </LinearLayout>
+
+</FrameLayout>