diff --git a/tests/Camera2Tests/CameraToo/Android.mk b/tests/Camera2Tests/CameraToo/Android.mk new file mode 100644 index 0000000000000..7e5911d65bfac --- /dev/null +++ b/tests/Camera2Tests/CameraToo/Android.mk @@ -0,0 +1,23 @@ +# Copyright (C) 2014 The Android Open Source Project +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE_TAGS := tests +LOCAL_PACKAGE_NAME := CameraToo +LOCAL_SDK_VERSION := current +LOCAL_SRC_FILES := $(call all-java-files-under,src) + +include $(BUILD_PACKAGE) diff --git a/tests/Camera2Tests/CameraToo/AndroidManifest.xml b/tests/Camera2Tests/CameraToo/AndroidManifest.xml new file mode 100644 index 0000000000000..a92b5d81f6607 --- /dev/null +++ b/tests/Camera2Tests/CameraToo/AndroidManifest.xml @@ -0,0 +1,33 @@ + + + + + + + + + + + + + + + + diff --git a/tests/Camera2Tests/CameraToo/res/layout/mainactivity.xml b/tests/Camera2Tests/CameraToo/res/layout/mainactivity.xml new file mode 100644 index 0000000000000..f93f177268cea --- /dev/null +++ b/tests/Camera2Tests/CameraToo/res/layout/mainactivity.xml @@ -0,0 +1,23 @@ + + + + + diff --git a/tests/Camera2Tests/CameraToo/src/com/example/android/camera2/cameratoo/CameraTooActivity.java b/tests/Camera2Tests/CameraToo/src/com/example/android/camera2/cameratoo/CameraTooActivity.java new file mode 100644 index 0000000000000..c630bad2a96cb --- /dev/null +++ b/tests/Camera2Tests/CameraToo/src/com/example/android/camera2/cameratoo/CameraTooActivity.java @@ -0,0 +1,437 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.example.android.camera2.cameratoo; + +import android.app.Activity; +import android.graphics.ImageFormat; +import android.hardware.camera2.CameraAccessException; +import android.hardware.camera2.CameraCharacteristics; +import android.hardware.camera2.CameraCaptureSession; +import android.hardware.camera2.CameraDevice; +import android.hardware.camera2.CameraManager; +import android.hardware.camera2.CaptureFailure; +import android.hardware.camera2.CaptureRequest; +import android.hardware.camera2.TotalCaptureResult; +import android.hardware.camera2.params.StreamConfigurationMap; +import android.media.Image; +import android.media.ImageReader; +import android.os.Bundle; +import android.os.Environment; +import android.os.Handler; +import android.os.HandlerThread; +import android.os.Looper; +import android.util.Size; +import android.util.Log; +import android.view.Surface; +import android.view.SurfaceHolder; +import android.view.SurfaceView; +import android.view.View; + +import java.io.File; +import java.io.FileNotFoundException; +import java.io.FileOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; + +/** + * A basic demonstration of how to write a point-and-shoot camera app against the new + * android.hardware.camera2 API. + */ +public class CameraTooActivity extends Activity { + /** Output files will be saved as /sdcard/Pictures/cameratoo*.jpg */ + static final String CAPTURE_FILENAME_PREFIX = "cameratoo"; + /** Tag to distinguish log prints. */ + static final String TAG = "CameraToo"; + + /** An additional thread for running tasks that shouldn't block the UI. */ + HandlerThread mBackgroundThread; + /** Handler for running tasks in the background. */ + Handler mBackgroundHandler; + /** Handler for running tasks on the UI thread. */ + Handler mForegroundHandler; + /** View for displaying the camera preview. */ + SurfaceView mSurfaceView; + /** Used to retrieve the captured image when the user takes a snapshot. */ + ImageReader mCaptureBuffer; + /** Handle to the Android camera services. */ + CameraManager mCameraManager; + /** The specific camera device that we're using. */ + CameraDevice mCamera; + /** Our image capture session. */ + CameraCaptureSession mCaptureSession; + + /** + * Given {@code choices} of {@code Size}s supported by a camera, chooses the smallest one whose + * width and height are at least as large as the respective requested values. + * @param choices The list of sizes that the camera supports for the intended output class + * @param width The minimum desired width + * @param height The minimum desired height + * @return The optimal {@code Size}, or an arbitrary one if none were big enough + */ + static Size chooseBigEnoughSize(Size[] choices, int width, int height) { + // Collect the supported resolutions that are at least as big as the preview Surface + List bigEnough = new ArrayList(); + for (Size option : choices) { + if (option.getWidth() >= width && option.getHeight() >= height) { + bigEnough.add(option); + } + } + + // Pick the smallest of those, assuming we found any + if (bigEnough.size() > 0) { + return Collections.min(bigEnough, new CompareSizesByArea()); + } else { + Log.e(TAG, "Couldn't find any suitable preview size"); + return choices[0]; + } + } + + /** + * Compares two {@code Size}s based on their areas. + */ + static class CompareSizesByArea implements Comparator { + @Override + public int compare(Size lhs, Size rhs) { + // We cast here to ensure the multiplications won't overflow + return Long.signum((long) lhs.getWidth() * lhs.getHeight() - + (long) rhs.getWidth() * rhs.getHeight()); + } + } + + /** + * Called when our {@code Activity} gains focus.

Starts initializing the camera.

+ */ + @Override + protected void onResume() { + super.onResume(); + + // Start a background thread to manage camera requests + mBackgroundThread = new HandlerThread("background"); + mBackgroundThread.start(); + mBackgroundHandler = new Handler(mBackgroundThread.getLooper()); + mForegroundHandler = new Handler(getMainLooper()); + + mCameraManager = (CameraManager) getSystemService(CAMERA_SERVICE); + + // Inflate the SurfaceView, set it as the main layout, and attach a listener + View layout = getLayoutInflater().inflate(R.layout.mainactivity, null); + mSurfaceView = (SurfaceView) layout.findViewById(R.id.mainSurfaceView); + mSurfaceView.getHolder().addCallback(mSurfaceHolderCallback); + setContentView(mSurfaceView); + + // Control flow continues in mSurfaceHolderCallback.surfaceChanged() + } + + /** + * Called when our {@code Activity} loses focus.

Tears everything back down.

+ */ + @Override + protected void onPause() { + super.onPause(); + + try { + // Ensure SurfaceHolderCallback#surfaceChanged() will run again if the user returns + mSurfaceView.getHolder().setFixedSize(/*width*/0, /*height*/0); + + // Cancel any stale preview jobs + if (mCaptureSession != null) { + mCaptureSession.close(); + mCaptureSession = null; + } + } finally { + if (mCamera != null) { + mCamera.close(); + mCamera = null; + } + } + + // Finish processing posted messages, then join on the handling thread + mBackgroundThread.quitSafely(); + try { + mBackgroundThread.join(); + } catch (InterruptedException ex) { + Log.e(TAG, "Background worker thread was interrupted while joined", ex); + } + + // Close the ImageReader now that the background thread has stopped + if (mCaptureBuffer != null) mCaptureBuffer.close(); + } + + /** + * Called when the user clicks on our {@code SurfaceView}, which has ID {@code mainSurfaceView} + * as defined in the {@code mainactivity.xml} layout file.

Captures a full-resolution image + * and saves it to permanent storage.

+ */ + public void onClickOnSurfaceView(View v) { + if (mCaptureSession != null) { + try { + CaptureRequest.Builder requester = + mCamera.createCaptureRequest(mCamera.TEMPLATE_STILL_CAPTURE); + requester.addTarget(mCaptureBuffer.getSurface()); + try { + // This handler can be null because we aren't actually attaching any callback + mCaptureSession.capture(requester.build(), /*listener*/null, /*handler*/null); + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to file actual capture request", ex); + } + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to build actual capture request", ex); + } + } else { + Log.e(TAG, "User attempted to perform a capture outside our session"); + } + + // Control flow continues in mImageCaptureListener.onImageAvailable() + } + + /** + * Callbacks invoked upon state changes in our {@code SurfaceView}. + */ + final SurfaceHolder.Callback mSurfaceHolderCallback = new SurfaceHolder.Callback() { + /** The camera device to use, or null if we haven't yet set a fixed surface size. */ + private String mCameraId; + + /** Whether we received a change callback after setting our fixed surface size. */ + private boolean mGotSecondCallback; + + @Override + public void surfaceCreated(SurfaceHolder holder) { + // This is called every time the surface returns to the foreground + Log.i(TAG, "Surface created"); + mCameraId = null; + mGotSecondCallback = false; + } + + @Override + public void surfaceDestroyed(SurfaceHolder holder) { + Log.i(TAG, "Surface destroyed"); + holder.removeCallback(this); + // We don't stop receiving callbacks forever because onResume() will reattach us + } + + @Override + public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { + // On the first invocation, width and height were automatically set to the view's size + if (mCameraId == null) { + // Find the device's back-facing camera and set the destination buffer sizes + try { + for (String cameraId : mCameraManager.getCameraIdList()) { + CameraCharacteristics cameraCharacteristics = + mCameraManager.getCameraCharacteristics(cameraId); + if (cameraCharacteristics.get(cameraCharacteristics.LENS_FACING) == + CameraCharacteristics.LENS_FACING_BACK) { + Log.i(TAG, "Found a back-facing camera"); + StreamConfigurationMap info = cameraCharacteristics + .get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); + + // Bigger is better when it comes to saving our image + Size largestSize = Collections.max( + Arrays.asList(info.getOutputSizes(ImageFormat.JPEG)), + new CompareSizesByArea()); + + // Prepare an ImageReader in case the user wants to capture images + Log.i(TAG, "Capture size: " + largestSize); + mCaptureBuffer = ImageReader.newInstance(largestSize.getWidth(), + largestSize.getHeight(), ImageFormat.JPEG, /*maxImages*/2); + mCaptureBuffer.setOnImageAvailableListener( + mImageCaptureListener, mBackgroundHandler); + + // Danger, W.R.! Attempting to use too large a preview size could + // exceed the camera bus' bandwidth limitation, resulting in + // gorgeous previews but the storage of garbage capture data. + Log.i(TAG, "SurfaceView size: " + + mSurfaceView.getWidth() + 'x' + mSurfaceView.getHeight()); + Size optimalSize = chooseBigEnoughSize( + info.getOutputSizes(SurfaceHolder.class), width, height); + + // Set the SurfaceHolder to use the camera's largest supported size + Log.i(TAG, "Preview size: " + optimalSize); + SurfaceHolder surfaceHolder = mSurfaceView.getHolder(); + surfaceHolder.setFixedSize(optimalSize.getWidth(), + optimalSize.getHeight()); + + mCameraId = cameraId; + return; + + // Control flow continues with this method one more time + // (since we just changed our own size) + } + } + } catch (CameraAccessException ex) { + Log.e(TAG, "Unable to list cameras", ex); + } + + Log.e(TAG, "Didn't find any back-facing cameras"); + // This is the second time the method is being invoked: our size change is complete + } else if (!mGotSecondCallback) { + if (mCamera != null) { + Log.e(TAG, "Aborting camera open because it hadn't been closed"); + return; + } + + // Open the camera device + try { + mCameraManager.openCamera(mCameraId, mCameraStateListener, + mBackgroundHandler); + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to configure output surface", ex); + } + mGotSecondCallback = true; + + // Control flow continues in mCameraStateListener.onOpened() + } + }}; + + /** + * Calledbacks invoked upon state changes in our {@code CameraDevice}.

These are run on + * {@code mBackgroundThread}.

+ */ + final CameraDevice.StateListener mCameraStateListener = + new CameraDevice.StateListener() { + @Override + public void onOpened(CameraDevice camera) { + Log.i(TAG, "Successfully opened camera"); + mCamera = camera; + try { + List outputs = Arrays.asList( + mSurfaceView.getHolder().getSurface(), mCaptureBuffer.getSurface()); + camera.createCaptureSession(outputs, mCaptureSessionListener, + mBackgroundHandler); + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to create a capture session", ex); + } + + // Control flow continues in mCaptureSessionListener.onConfigured() + } + + @Override + public void onDisconnected(CameraDevice camera) { + Log.e(TAG, "Camera was disconnected"); + } + + @Override + public void onError(CameraDevice camera, int error) { + Log.e(TAG, "State error on device '" + camera.getId() + "': code " + error); + }}; + + /** + * Callbacks invoked upon state changes in our {@code CameraCaptureSession}.

These are run on + * {@code mBackgroundThread}.

+ */ + final CameraCaptureSession.StateListener mCaptureSessionListener = + new CameraCaptureSession.StateListener() { + @Override + public void onConfigured(CameraCaptureSession session) { + Log.i(TAG, "Finished configuring camera outputs"); + mCaptureSession = session; + + SurfaceHolder holder = mSurfaceView.getHolder(); + if (holder != null) { + try { + // Build a request for preview footage + CaptureRequest.Builder requestBuilder = + mCamera.createCaptureRequest(mCamera.TEMPLATE_PREVIEW); + requestBuilder.addTarget(holder.getSurface()); + CaptureRequest previewRequest = requestBuilder.build(); + + // Start displaying preview images + try { + session.setRepeatingRequest(previewRequest, /*listener*/null, + /*handler*/null); + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to make repeating preview request", ex); + } + } catch (CameraAccessException ex) { + Log.e(TAG, "Failed to build preview request", ex); + } + } + else { + Log.e(TAG, "Holder didn't exist when trying to formulate preview request"); + } + } + + @Override + public void onClosed(CameraCaptureSession session) { + mCaptureSession = null; + } + + @Override + public void onConfigureFailed(CameraCaptureSession session) { + Log.e(TAG, "Configuration error on device '" + mCamera.getId()); + }}; + + /** + * Callback invoked when we've received a JPEG image from the camera. + */ + final ImageReader.OnImageAvailableListener mImageCaptureListener = + new ImageReader.OnImageAvailableListener() { + @Override + public void onImageAvailable(ImageReader reader) { + // Save the image once we get a chance + mBackgroundHandler.post(new CapturedImageSaver(reader.acquireNextImage())); + + // Control flow continues in CapturedImageSaver#run() + }}; + + /** + * Deferred processor responsible for saving snapshots to disk.

This is run on + * {@code mBackgroundThread}.

+ */ + static class CapturedImageSaver implements Runnable { + /** The image to save. */ + private Image mCapture; + + public CapturedImageSaver(Image capture) { + mCapture = capture; + } + + @Override + public void run() { + try { + // Choose an unused filename under the Pictures/ directory + File file = File.createTempFile(CAPTURE_FILENAME_PREFIX, ".jpg", + Environment.getExternalStoragePublicDirectory( + Environment.DIRECTORY_PICTURES)); + try (FileOutputStream ostream = new FileOutputStream(file)) { + Log.i(TAG, "Retrieved image is" + + (mCapture.getFormat() == ImageFormat.JPEG ? "" : "n't") + " a JPEG"); + ByteBuffer buffer = mCapture.getPlanes()[0].getBuffer(); + Log.i(TAG, "Captured image size: " + + mCapture.getWidth() + 'x' + mCapture.getHeight()); + + // Write the image out to the chosen file + byte[] jpeg = new byte[buffer.remaining()]; + buffer.get(jpeg); + ostream.write(jpeg); + } catch (FileNotFoundException ex) { + Log.e(TAG, "Unable to open output file for writing", ex); + } catch (IOException ex) { + Log.e(TAG, "Failed to write the image to the output file", ex); + } + } catch (IOException ex) { + Log.e(TAG, "Unable to create a new output file", ex); + } finally { + mCapture.close(); + } + } + } +} diff --git a/tests/Camera2Tests/CameraToo/tests/Android.mk b/tests/Camera2Tests/CameraToo/tests/Android.mk new file mode 100644 index 0000000000000..0b58243b8b833 --- /dev/null +++ b/tests/Camera2Tests/CameraToo/tests/Android.mk @@ -0,0 +1,25 @@ +# Copyright (C) 2014 The Android Open Source Project +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +LOCAL_PATH := $(call my-dir) +include $(CLEAR_VARS) + +LOCAL_MODULE_TAGS := tests +LOCAL_PACKAGE_NAME := CameraTooTests +LOCAL_INSTRUMENTATION_FOR := CameraToo +LOCAL_SDK_VERSION := current +LOCAL_SRC_FILES := $(call all-java-files-under,src) +LOCAL_STATIC_JAVA_LIBRARIES := android-support-test mockito-target + +include $(BUILD_PACKAGE) diff --git a/tests/Camera2Tests/CameraToo/tests/AndroidManifest.xml b/tests/Camera2Tests/CameraToo/tests/AndroidManifest.xml new file mode 100644 index 0000000000000..30210bae5cd13 --- /dev/null +++ b/tests/Camera2Tests/CameraToo/tests/AndroidManifest.xml @@ -0,0 +1,29 @@ + + + + + + + + + + + + diff --git a/tests/Camera2Tests/CameraToo/tests/src/com/example/android/camera2/cameratoo/CameraTooTest.java b/tests/Camera2Tests/CameraToo/tests/src/com/example/android/camera2/cameratoo/CameraTooTest.java new file mode 100644 index 0000000000000..3acca5aa90aa2 --- /dev/null +++ b/tests/Camera2Tests/CameraToo/tests/src/com/example/android/camera2/cameratoo/CameraTooTest.java @@ -0,0 +1,189 @@ +/* + * Copyright (C) 2014 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.example.android.camera2.cameratoo; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertTrue; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.when; + +import android.media.Image; +import android.os.Environment; +import android.util.Size; + +import java.io.File; +import java.io.FileInputStream; +import java.io.FileNotFoundException; +import java.io.FilenameFilter; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Arrays; +import java.util.Comparator; +import java.util.HashSet; +import java.util.Set; + +import com.example.android.camera2.cameratoo.CameraTooActivity; +import org.junit.Test; + +public class CameraTooTest { + private void assertComparatorEq(T lhs, T rhs, Comparator rel) { + assertEquals(String.format("%s should be equal to %s", lhs, rhs), rel.compare(lhs, rhs), 0); + assertEquals(String.format("%s should be equal to %s (reverse check)", lhs, rhs), + rel.compare(rhs, lhs), 0); + } + + private void assertComparatorLt(T lhs, T rhs, Comparator rel) { + assertTrue(String.format("%s should be less than %s", lhs, rhs), rel.compare(lhs, rhs) < 0); + assertTrue(String.format("%s should be less than %s (reverse check)", lhs, rhs), + rel.compare(rhs, lhs) > 0); + } + + @Test + public void compareSizesByArea() { + Size empty = new Size(0, 0), fatAndFlat = new Size(100, 0), tallAndThin = new Size(0, 100); + Size smallSquare = new Size(4, 4), horizRect = new Size(8, 2), vertRect = new Size(2, 8); + Size largeSquare = new Size(5, 5); + Comparator rel = new CameraTooActivity.CompareSizesByArea(); + + assertComparatorEq(empty, fatAndFlat, rel); + assertComparatorEq(empty, tallAndThin, rel); + assertComparatorEq(fatAndFlat, empty, rel); + assertComparatorEq(fatAndFlat, tallAndThin, rel); + assertComparatorEq(tallAndThin, empty, rel); + assertComparatorEq(tallAndThin, fatAndFlat, rel); + + assertComparatorEq(smallSquare, horizRect, rel); + assertComparatorEq(smallSquare, vertRect, rel); + assertComparatorEq(horizRect, smallSquare, rel); + assertComparatorEq(horizRect, vertRect, rel); + assertComparatorEq(vertRect, smallSquare, rel); + assertComparatorEq(vertRect, horizRect, rel); + + assertComparatorLt(empty, smallSquare, rel); + assertComparatorLt(empty, horizRect, rel); + assertComparatorLt(empty, vertRect, rel); + + assertComparatorLt(fatAndFlat, smallSquare, rel); + assertComparatorLt(fatAndFlat, horizRect, rel); + assertComparatorLt(fatAndFlat, vertRect, rel); + + assertComparatorLt(tallAndThin, smallSquare, rel); + assertComparatorLt(tallAndThin, horizRect, rel); + assertComparatorLt(tallAndThin, vertRect, rel); + + assertComparatorLt(empty, largeSquare, rel); + assertComparatorLt(fatAndFlat, largeSquare, rel); + assertComparatorLt(tallAndThin, largeSquare, rel); + assertComparatorLt(smallSquare, largeSquare, rel); + assertComparatorLt(horizRect, largeSquare, rel); + assertComparatorLt(vertRect, largeSquare, rel); + } + + private void assertOptimalSize(Size[] options, int minWidth, int minHeight, Size expected) { + Size verdict = CameraTooActivity.chooseBigEnoughSize(options, minWidth, minHeight); + assertEquals(String.format("Expected optimal size %s but got %s", expected, verdict), + verdict, expected); + } + + @Test + public void chooseBigEnoughSize() { + Size empty = new Size(0, 0), fatAndFlat = new Size(100, 0), tallAndThin = new Size(0, 100); + Size smallSquare = new Size(4, 4), horizRect = new Size(8, 2), vertRect = new Size(2, 8); + Size largeSquare = new Size(5, 5); + Size[] siz = + { empty, fatAndFlat, tallAndThin, smallSquare, horizRect, vertRect, largeSquare }; + + assertOptimalSize(siz, 0, 0, empty); + + assertOptimalSize(siz, 1, 0, fatAndFlat); + assertOptimalSize(siz, 0, 1, tallAndThin); + + assertOptimalSize(siz, 4, 4, smallSquare); + assertOptimalSize(siz, 1, 1, smallSquare); + assertOptimalSize(siz, 2, 1, smallSquare); + assertOptimalSize(siz, 1, 2, smallSquare); + assertOptimalSize(siz, 3, 4, smallSquare); + assertOptimalSize(siz, 4, 3, smallSquare); + + assertOptimalSize(siz, 8, 2, horizRect); + assertOptimalSize(siz, 5, 1, horizRect); + assertOptimalSize(siz, 5, 2, horizRect); + + assertOptimalSize(siz, 2, 8, vertRect); + assertOptimalSize(siz, 1, 5, vertRect); + assertOptimalSize(siz, 2, 5, vertRect); + + assertOptimalSize(siz, 5, 5, largeSquare); + assertOptimalSize(siz, 3, 5, largeSquare); + assertOptimalSize(siz, 5, 3, largeSquare); + } + + private static final FilenameFilter OUTPUT_FILE_DECIDER = new FilenameFilter() { + @Override + public boolean accept(File dir, String filename) { + return filename.indexOf("cameratoo") == 0 && + filename.indexOf(".jpg") == filename.length() - ".jpg".length(); + }}; + + private static Set newlyAddedElements(Set before, Set after) { + Set result = new HashSet(after); + result.removeAll(before); + return result; + } + + @Test + public void capturedImageSaver() throws FileNotFoundException, IOException { + ByteBuffer buf = ByteBuffer.allocate(25); + for(int index = 0; index < buf.capacity(); ++index) + buf.put(index, (byte) index); + + Image.Plane plane = mock(Image.Plane.class); + when(plane.getBuffer()).thenReturn(buf); + when(plane.getPixelStride()).thenReturn(1); + when(plane.getRowStride()).thenReturn(5); + + Image.Plane[] onlyPlaneThatMatters = { plane }; + Image image = mock(Image.class); + when(image.getPlanes()).thenReturn(onlyPlaneThatMatters); + when(image.getWidth()).thenReturn(5); + when(image.getHeight()).thenReturn(5); + + File picturesFolder = + Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); + Set preListing = + new HashSet(Arrays.asList(picturesFolder.listFiles(OUTPUT_FILE_DECIDER))); + + CameraTooActivity.CapturedImageSaver saver = + new CameraTooActivity.CapturedImageSaver(image); + saver.run(); + + Set postListing = + new HashSet(Arrays.asList(picturesFolder.listFiles(OUTPUT_FILE_DECIDER))); + Set newFiles = newlyAddedElements(preListing, postListing); + + assertEquals(newFiles.size(), 1); + + File picture = newFiles.iterator().next(); + FileInputStream istream = new FileInputStream(picture); + + for(int count = 0; count < buf.capacity(); ++count) { + assertEquals(istream.read(), buf.get(count)); + } + assertEquals(istream.read(), -1); + assertTrue(picture.delete()); + } +}