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path: root/src/com/android/camera/CaptureModule.java
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/*
 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
 * Not a Contribution.
 *
 * Copyright (C) 2012 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.android.camera;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.ImageFormat;
import android.graphics.Point;
import android.graphics.Rect;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CameraMetadata;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.CaptureResult;
import android.hardware.camera2.TotalCaptureResult;
import android.hardware.camera2.params.MeteringRectangle;
import android.hardware.camera2.params.StreamConfigurationMap;
import android.media.CameraProfile;
import android.media.Image;
import android.media.ImageReader;
import android.net.Uri;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.util.Size;
import android.util.SparseIntArray;
import android.view.KeyEvent;
import android.view.OrientationEventListener;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.View;
import android.widget.Toast;

import com.android.camera.PhotoModule.NamedImages;
import com.android.camera.PhotoModule.NamedImages.NamedEntity;
import com.android.camera.ui.RotateTextToast;
import com.android.camera.util.CameraUtil;

import org.codeaurora.snapcam.R;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

public class CaptureModule implements CameraModule, PhotoController,
        MediaSaveService.Listener {
    public static final int DUAL_MODE = 0;
    public static final int BAYER_MODE = 1;
    public static final int MONO_MODE = 2;
    private static final int OPEN_CAMERA = 0;
    private static final int MAX_NUM_CAM = 3;
    /**
     * Conversion from screen rotation to JPEG orientation.
     */
    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
    /**
     * Camera state: Showing camera preview.
     */
    private static final int STATE_PREVIEW = 0;
    /**
     * Camera state: Waiting for the focus to be locked.
     */
    private static final int STATE_WAITING_LOCK = 1;
    /**
     * Camera state: Waiting for the exposure to be precapture state.
     */
    private static final int STATE_WAITING_PRECAPTURE = 2;
    /**
     * Camera state: Waiting for the exposure state to be something other than precapture.
     */
    private static final int STATE_WAITING_NON_PRECAPTURE = 3;
    /**
     * Camera state: Picture was taken.
     */
    private static final int STATE_PICTURE_TAKEN = 4;
    //Todo: Read ids from the device dynamically
    private static final int BAYER_ID = 0;
    private static final int MONO_ID = 1;
    private static final String TAG = "SnapCam_CaptureModule";
    private static int MODE = DUAL_MODE;

    static {
        ORIENTATIONS.append(Surface.ROTATION_0, 90);
        ORIENTATIONS.append(Surface.ROTATION_90, 0);
        ORIENTATIONS.append(Surface.ROTATION_180, 270);
        ORIENTATIONS.append(Surface.ROTATION_270, 180);
    }

    MeteringRectangle[][] mAFRegions = new MeteringRectangle[MAX_NUM_CAM][];
    private int mLastResultAFState = -1;
    private Rect[] mCropRegion = new Rect[MAX_NUM_CAM];
    private boolean mAutoFocusSupported;
    // The degrees of the device rotated clockwise from its natural orientation.
    private int mOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
    private int mJpegQuality;
    private Map<String, String> mSettings = new HashMap<String, String>();
    private boolean mFirstTimeInitialized;
    private boolean mInitialized = false;
    private long mCaptureStartTime;
    private boolean mPaused = true;
    private boolean mSurfaceReady = false;
    private boolean[] mCameraOpened = new boolean[MAX_NUM_CAM];
    private CameraDevice[] mCameraDevice = new CameraDevice[MAX_NUM_CAM];
    private String[] mCameraId = new String[MAX_NUM_CAM];
    private CaptureUI mUI;
    private CameraActivity mActivity;
    private PreferenceGroup mPreferenceGroup;
    private ComboPreferences mPreferences;
    private CameraCharacteristics[] mCharacteristics = new CameraCharacteristics[MAX_NUM_CAM];
    private List<Integer> mCharacteristicsIndex;
    private float mZoomValue = 1f;
    private FocusStateListener mFocusStateListener;
    private LocationManager mLocationManager;
    /**
     * A {@link CameraCaptureSession } for camera preview.
     */
    private CameraCaptureSession[] mCaptureSession = new CameraCaptureSession[MAX_NUM_CAM];
    /**
     * An additional thread for running tasks that shouldn't block the UI.
     */
    private HandlerThread mCameraThread;
    private HandlerThread mImageAvailableThread;
    private HandlerThread mCallbackThread;
    /**
     * A {@link Handler} for running tasks in the background.
     */
    private Handler mCameraHandler;
    private Handler mImageAvailableHandler;
    private Handler mCallbackHandler;
    /**
     * An {@link ImageReader} that handles still image capture.
     */
    private ImageReader[] mImageReader = new ImageReader[MAX_NUM_CAM];
    private NamedImages mNamedImages;
    private ContentResolver mContentResolver;
    private MediaSaveService.OnMediaSavedListener mOnMediaSavedListener =
            new MediaSaveService.OnMediaSavedListener() {
                @Override
                public void onMediaSaved(Uri uri) {
                    if (uri != null) {
                        mActivity.notifyNewMedia(uri);
                    }
                }
            };
    /**
     * This a callback object for the {@link ImageReader}. "onImageAvailable" will be called when a
     * still image is ready to be saved.
     */
    private final ImageReader.OnImageAvailableListener mOnImageAvailableListener
            = new ImageReader.OnImageAvailableListener() {

        @Override
        public void onImageAvailable(ImageReader reader) {
            Log.d(TAG, "image available");
            mCaptureStartTime = System.currentTimeMillis();
            mNamedImages.nameNewImage(mCaptureStartTime);
            NamedEntity name = mNamedImages.getNextNameEntity();
            String title = (name == null) ? null : name.title;
            long date = (name == null) ? -1 : name.date;

            Image mImage = reader.acquireNextImage();
            ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
            //Todo: dont create new buffer and use the one from ImageReader
            byte[] bytes = new byte[buffer.remaining()];
            buffer.get(bytes);

            mActivity.getMediaSaveService().addImage(
                    bytes, title, date, null, reader.getWidth(), reader.getHeight(),
                    0, null, mOnMediaSavedListener, mContentResolver, "jpeg");
            mImage.close();
        }

    };
    /**
     * {@link CaptureRequest.Builder} for the camera preview
     */
    private CaptureRequest.Builder[] mPreviewRequestBuilder = new CaptureRequest.Builder[MAX_NUM_CAM];
    /**
     * The current state of camera state for taking pictures.
     *
     * @see #mCaptureCallback
     */
    private int[] mState = new int[MAX_NUM_CAM];
    /**
     * A {@link Semaphore} make sure the camera open callback happens first before closing the
     * camera.
     */
    private Semaphore mCameraOpenCloseLock = new Semaphore(1);
    /**
     * A {@link CameraCaptureSession.CaptureCallback} that handles events related to JPEG capture.
     */
    private CameraCaptureSession.CaptureCallback mCaptureCallback
            = new CameraCaptureSession.CaptureCallback() {

        private void process(CaptureResult result) {
            int id = (int) result.getRequest().getTag();

            switch (mState[id]) {
                case STATE_PREVIEW: {
                    break;
                }
                case STATE_WAITING_LOCK: {
                    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                    Log.d(TAG, "STATE_WAITING_LOCK afState:" + afState + " aeState:" + aeState);
                    // AF_PASSIVE is added for continous auto focus mode
                    if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState ||
                            CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState ||
                            CaptureRequest.CONTROL_AF_STATE_PASSIVE_FOCUSED == afState ||
                            CaptureResult.CONTROL_AF_STATE_PASSIVE_UNFOCUSED == afState) {
                        // CONTROL_AE_STATE can be null on some devices
                        if (aeState == null || (aeState == CaptureResult
                                .CONTROL_AE_STATE_CONVERGED) && isFlashOff()) {
                            mState[id] = STATE_PICTURE_TAKEN;
                            captureStillPicture(id);
                        } else {
                            runPrecaptureSequence(id);
                        }
                    }
                    break;
                }
                case STATE_WAITING_PRECAPTURE: {
                    // CONTROL_AE_STATE can be null on some devices
                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                    if (aeState == null ||
                            aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE ||
                            aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) {
                        mState[id] = STATE_WAITING_NON_PRECAPTURE;
                    }
                    break;
                }
                case STATE_WAITING_NON_PRECAPTURE: {
                    // CONTROL_AE_STATE can be null on some devices
                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
                    if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) {
                        mState[id] = STATE_PICTURE_TAKEN;
                        captureStillPicture(id);
                    }
                    break;
                }
            }
        }

        @Override
        public void onCaptureProgressed(CameraCaptureSession session,
                                        CaptureRequest request,
                                        CaptureResult partialResult) {
            int id = (int) partialResult.getRequest().getTag();
            if (id == getMainCameraId()) updateFocusStateChange(partialResult);
            process(partialResult);
        }

        @Override
        public void onCaptureCompleted(CameraCaptureSession session,
                                       CaptureRequest request,
                                       TotalCaptureResult result) {
            int id = (int) result.getRequest().getTag();
            if (id == getMainCameraId()) updateFocusStateChange(result);
            process(result);
        }
    };
    private final CameraPreference.OnPreferenceChangedListener prefListener = new
            CameraPreference.OnPreferenceChangedListener() {
                @Override
                public void onSharedPreferenceChanged(ListPreference pref) {
                    if (mPaused) return;
                    if (CameraSettings.KEY_CAMERA_SAVEPATH.equals(pref.getKey())) {
                        Storage.setSaveSDCard(
                                mPreferences.getString(CameraSettings.KEY_CAMERA_SAVEPATH, "0")
                                        .equals("1"));
                        mActivity.updateStorageSpaceAndHint();
                    }

                    switch (MODE) {
                        case BAYER_MODE:
                            applyPreference(0, pref);
                            break;
                        case MONO_MODE:
                            applyPreference(1, pref);
                            break;
                        case DUAL_MODE:
                            applyPreference(0, pref);
                            applyPreference(1, pref);
                    }
                    mUI.overrideSettings(pref.getKey(), null);
                }

                @Override
                public void onSharedPreferenceChanged() {
                    if (mPaused) return;
                    boolean recordLocation = RecordLocationPreference.get(
                            mPreferences, mContentResolver);
                    mLocationManager.recordLocation(recordLocation);
                }

                @Override
                public void onRestorePreferencesClicked() {
                }

                @Override
                public void onOverriddenPreferencesClicked() {
                }

                @Override
                public void onCameraPickerClicked(int cameraId) {
                }
            };
    private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {

        @Override
        public void onOpened(CameraDevice cameraDevice) {
            int id = Integer.parseInt(cameraDevice.getId());
            Log.d(TAG, "onOpened " + id);
            mCameraOpenCloseLock.release();
            if (mPaused) {
                return;
            }
            if (MODE == DUAL_MODE && id == BAYER_ID) {
                Message msg = Message.obtain();
                msg.what = OPEN_CAMERA;
                msg.arg1 = MONO_ID;
                mCameraHandler.sendMessage(msg);
            }
            if (!mInitialized) {
                mInitialized = true;
                mActivity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        mUI.onCameraOpened(mCharacteristics, mCharacteristicsIndex,
                                mPreferenceGroup, prefListener);
                    }
                });
            }

            mCameraDevice[id] = cameraDevice;
            mCameraOpened[id] = true;
            createSession(id);
        }

        @Override
        public void onDisconnected(CameraDevice cameraDevice) {
            int id = Integer.parseInt(cameraDevice.getId());
            Log.d(TAG, "onDisconnected " + id);
            cameraDevice.close();
            mCameraDevice = null;
            mCameraOpenCloseLock.release();
        }

        @Override
        public void onError(CameraDevice cameraDevice, int error) {
            int id = Integer.parseInt(cameraDevice.getId());
            Log.d(TAG, "onError " + id + error);
            cameraDevice.close();
            mCameraDevice[id] = null;
            mCameraOpenCloseLock.release();
            if (null != mActivity) {
                mActivity.finish();
            }
        }

        @Override
        public void onClosed(CameraDevice cameraDevice) {
            int id = Integer.parseInt(cameraDevice.getId());
            Log.d(TAG, "onClosed " + id);
            mCameraDevice[id] = null;
            mCameraOpenCloseLock.release();
        }

    };

    public static boolean setMode(String value) {
        int mode = DUAL_MODE;
        switch (value) {
            case "dual":
                mode = DUAL_MODE;
                break;
            case "bayer":
                mode = BAYER_MODE;
                break;
            case "mono":
                mode = MONO_MODE;
                break;
        }
        if (MODE == mode) return false;
        MODE = mode;
        return true;
    }

    public static int getQualityNumber(String jpegQuality) {
        try {
            int qualityPercentile = Integer.parseInt(jpegQuality);
            if (qualityPercentile >= 0 && qualityPercentile <= 100)
                return qualityPercentile;
            else
                return 85;
        } catch (NumberFormatException nfe) {
            //chosen quality is not a number, continue
        }
        int value = 0;
        switch (jpegQuality) {
            case "superfine":
                value = CameraProfile.QUALITY_HIGH;
                break;
            case "fine":
                value = CameraProfile.QUALITY_MEDIUM;
                break;
            case "normal":
                value = CameraProfile.QUALITY_LOW;
                break;
            default:
                return 85;
        }
        return CameraProfile.getJpegEncodingQualityParameter(value);
    }

    private void initializeFirstTime() {
        if (mFirstTimeInitialized || mPaused) {
            return;
        }

        //Todo: test record location. Jack to provide instructions
        // Initialize location service.
        boolean recordLocation = RecordLocationPreference.get(
                mPreferences, mContentResolver);
        mLocationManager.recordLocation(recordLocation);

        mUI.initializeFirstTime();
        MediaSaveService s = mActivity.getMediaSaveService();
        // We set the listener only when both service and shutterbutton
        // are initialized.
        if (s != null) {
            s.setListener(this);
        }

        mNamedImages = new NamedImages();
        mFirstTimeInitialized = true;
    }

    private void initializeSecondTime() {
        // Start location update if needed.
        boolean recordLocation = RecordLocationPreference.get(
                mPreferences, mContentResolver);
        mLocationManager.recordLocation(recordLocation);
        MediaSaveService s = mActivity.getMediaSaveService();
        if (s != null) {
            s.setListener(this);
        }
        mNamedImages = new NamedImages();
        mUI.initializeSecondTime();
    }

    private void createSession(final int id) {
        if (mPaused || !mCameraOpened[id] || !mSurfaceReady) return;
        List<Surface> list = new LinkedList<Surface>();
        mUI.hidePreviewCover();
        try {
            Surface surface;
            if (id == BAYER_ID || (id == MONO_ID && MODE == MONO_MODE)) {
                SurfaceHolder sh = mUI.getSurfaceHolder();
                if (sh == null) {
                    return;
                }
                surface = sh.getSurface();
            } else {
                SurfaceHolder sh = mUI.getSurfaceHolder2();
                if (sh == null) {
                    return;
                }
                surface = sh.getSurface();
            }
            // We set up a CaptureRequest.Builder with the output Surface.
            mPreviewRequestBuilder[id] = mCameraDevice[id].createCaptureRequest(CameraDevice
                    .TEMPLATE_PREVIEW);
            mPreviewRequestBuilder[id].setTag(id);
            mPreviewRequestBuilder[id].addTarget(surface);

            list.add(surface);
            list.add(mImageReader[id].getSurface());
            // Here, we create a CameraCaptureSession for camera preview.
            mCameraDevice[id].createCaptureSession(list,
                    new CameraCaptureSession.StateCallback() {

                        @Override
                        public void onConfigured(CameraCaptureSession cameraCaptureSession) {
                            // The camera is already closed
                            if (mPaused || null == mCameraDevice[id]) {
                                return;
                            }
                            // When the session is ready, we start displaying the preview.
                            mCaptureSession[id] = cameraCaptureSession;
                            initializePreviewConfiguration(id);
                            try {
                                // Finally, we start displaying the camera preview.
                                mCaptureSession[id].setRepeatingRequest(mPreviewRequestBuilder[id]
                                        .build(), mCaptureCallback, mCameraHandler);
                            } catch (CameraAccessException e) {
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onConfigureFailed(
                                CameraCaptureSession cameraCaptureSession) {
                        }
                    }, null
            );
        } catch (CameraAccessException e) {
        }
    }

    @Override
    public void init(CameraActivity activity, View parent) {
        Log.d(TAG, "init");
        for (int i = 0; i < MAX_NUM_CAM; i++) {
            mCameraOpened[i] = false;
        }
        mSurfaceReady = false;

        mActivity = activity;
        for (int i = 0; i < MAX_NUM_CAM; i++) {
            mState[i] = STATE_PREVIEW;
        }

        mPreferences = new ComboPreferences(mActivity);
        CameraSettings.upgradeGlobalPreferences(mPreferences.getGlobal(), activity);

        mPreferences.setLocalId(mActivity, BAYER_ID);
        CameraSettings.upgradeLocalPreferences(mPreferences.getLocal());

        PreferenceInflater inflater = new PreferenceInflater(mActivity);
        PreferenceGroup group =
                (PreferenceGroup) inflater.inflate(R.xml.camera_preferences);
        mPreferenceGroup = group;

        ListPreference pref = group.findPreference(CameraSettings.KEY_DUAL_CAMERA);
        setMode(pref.getValue());

        mContentResolver = mActivity.getContentResolver();
        mUI = new CaptureUI(activity, this, parent);
        mUI.initializeControlByIntent();
        mFocusStateListener = new FocusStateListener(mUI);
        mLocationManager = new LocationManager(mActivity, mUI);
        Storage.setSaveSDCard(
                mPreferences.getString(CameraSettings.KEY_CAMERA_SAVEPATH, "0").equals("1"));
    }

    /**
     * Initiate a still image capture.
     */
    private void takePicture() {
        Log.d(TAG, "takePicture");
        switch (MODE) {
            case DUAL_MODE:
                lockFocus(BAYER_ID);
                lockFocus(MONO_ID);
                break;
            case BAYER_MODE:
                lockFocus(BAYER_ID);
                break;
            case MONO_MODE:
                lockFocus(MONO_ID);
                break;
        }
    }

    /**
     * Lock the focus as the first step for a still image capture.
     */
    private void lockFocus(int id) {
        Log.d(TAG, "lockFocus " + id);
        try {
            CaptureRequest.Builder builder = mCameraDevice[id].createCaptureRequest(CameraDevice
                    .TEMPLATE_PREVIEW);
            builder.setTag(id);
            builder.addTarget(getPreviewSurface(id));

            builder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_MODE, CameraMetadata.CONTROL_AF_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_TRIGGER, CaptureRequest.CONTROL_AF_TRIGGER_START);
            applyWhiteBalance(builder);
            applyZoom(builder, id);
            mState[id] = STATE_WAITING_LOCK;
            mCaptureSession[id].capture(builder.build(), mCaptureCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    private void autoFocusTrigger(int id) {
        Log.d(TAG, "autoFocusTrigger " + id);
        try {
            CaptureRequest.Builder builder = mCameraDevice[id].createCaptureRequest(CameraDevice
                    .TEMPLATE_PREVIEW);
            builder.setTag(id);
            builder.addTarget(getPreviewSurface(id));

            builder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_MODE, CameraMetadata.CONTROL_AF_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_TRIGGER, CaptureRequest.CONTROL_AF_TRIGGER_START);
            applyWhiteBalance(builder);
            applyZoom(builder, id);
            applyAFRegions(builder, id);
            mCaptureSession[id].capture(builder.build(), mCaptureCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    /**
     * Capture a still picture. This method should be called when we get a response in
     * {@link #mCaptureCallback} from both {@link #lockFocus()}.
     */
    private void captureStillPicture(final int id) {
        Log.d(TAG, "captureStillPicture " + id);
        try {
            if (null == mActivity || null == mCameraDevice[id]) {
                return;
            }
            CaptureRequest.Builder captureBuilder =
                    mCameraDevice[id].createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);

            captureBuilder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);
            captureBuilder.addTarget(getPreviewSurface(id));
            captureBuilder.addTarget(mImageReader[id].getSurface());
            captureBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_AUTO);
            captureBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER, CaptureRequest
                    .CONTROL_AF_TRIGGER_IDLE);
            applyCaptureSettings(captureBuilder, id);

            // Orientation
            int rotation = mActivity.getWindowManager().getDefaultDisplay().getRotation();
            captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));

            CameraCaptureSession.CaptureCallback CaptureCallback
                    = new CameraCaptureSession.CaptureCallback() {

                @Override
                public void onCaptureCompleted(CameraCaptureSession session,
                                               CaptureRequest request,
                                               TotalCaptureResult result) {
                    Log.d(TAG, "captureStillPicture onCaptureCompleted");
                }

                @Override
                public void onCaptureSequenceCompleted(CameraCaptureSession session, int
                        sequenceId, long frameNumber) {
                    Log.d(TAG, "captureStillPicture onCaptureSequenceCompleted");
                    unlockFocus(id);
                }
            };
            mCaptureSession[id].stopRepeating();
            mCaptureSession[id].capture(captureBuilder.build(), CaptureCallback, mCallbackHandler);
        } catch (CameraAccessException e) {
            Log.d(TAG, "Capture still picture has failed");
            e.printStackTrace();
        }
    }

    /**
     * Run the precapture sequence for capturing a still image. This method should be called when
     * we get a response in {@link #mCaptureCallback} from {@link #lockFocus()}.
     */
    private void runPrecaptureSequence(int id) {
        Log.d(TAG, "runPrecaptureSequence");
        try {
            CaptureRequest.Builder builder = mCameraDevice[id].createCaptureRequest(CameraDevice
                    .TEMPLATE_PREVIEW);
            builder.setTag(id);
            builder.addTarget(getPreviewSurface(id));
            builder.set(CaptureRequest.CONTROL_MODE, CaptureRequest.CONTROL_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER,
                    CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START);
            // Applying flash only to capture does not work. Need to apply flash here.
            applyFlash(builder);
            applyWhiteBalance(builder);
            applyZoom(builder, id);
            mState[id] = STATE_WAITING_PRECAPTURE;
            mCaptureSession[id].capture(builder.build(), mCaptureCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    /**
     * Sets up member variables related to camera.
     *
     * @param width  The width of available size for camera preview
     * @param height The height of available size for camera preview
     */
    private void setUpCameraOutputs() {
        CameraManager manager = (CameraManager) mActivity.getSystemService(Context.CAMERA_SERVICE);
        try {
            String[] cameraIdList = manager.getCameraIdList();

            for (int i = 0; i < cameraIdList.length; i++) {
                String cameraId = cameraIdList[i];
                CameraCharacteristics characteristics
                        = manager.getCameraCharacteristics(cameraId);
                mCharacteristics[i] = characteristics;
                mCharacteristicsIndex.add(i);
                StreamConfigurationMap map = characteristics.get(
                        CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
                if (map == null) {
                    continue;
                }
                Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
                Log.d(TAG, "flash : " + (available == null ? false : available));
                // For still image captures, we use the largest available size.
                Size largest = Collections.max(
                        Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
                        new CompareSizesByArea());

                mImageReader[i] = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
                        ImageFormat.JPEG, 3);
                mImageReader[i].setOnImageAvailableListener(
                        mOnImageAvailableListener, mImageAvailableHandler);
                mCameraId[i] = cameraId;
            }
            mAutoFocusSupported = CameraUtil.isAutoFocusSupported(mCharacteristics,
                    mCharacteristicsIndex);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        } catch (NullPointerException e) {
        }
    }

    /**
     * Unlock the focus. This method should be called when still image capture sequence is
     * finished.
     */
    private void unlockFocus(int id) {
        Log.d(TAG, "unlockFocus " + id);
        try {
            CaptureRequest.Builder builder = mCameraDevice[id].createCaptureRequest(CameraDevice
                    .TEMPLATE_PREVIEW);
            builder.setTag(id);
            builder.addTarget(getPreviewSurface(id));
            builder.set(CaptureRequest.CONTROL_MODE, CaptureRequest
                    .CONTROL_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest
                    .CONTROL_AF_MODE_AUTO);
            builder.set(CaptureRequest.CONTROL_AF_TRIGGER,
                    CaptureRequest.CONTROL_AF_TRIGGER_CANCEL);
            //Todo: Create applyCommonSettings function for settings applied everytime
            applyWhiteBalance(builder);
            applyZoom(builder, id);
            mCaptureSession[id].capture(builder.build(), mCaptureCallback, mCameraHandler);
            mState[id] = STATE_PREVIEW;
            mCaptureSession[id].setRepeatingRequest(mPreviewRequestBuilder[id].build(),
                    mCaptureCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }


    /**
     * Closes the current {@link CameraDevice}.
     */
    private void closeCamera() {
        Log.d(TAG, "closeCamera");
        try {
            mCameraOpenCloseLock.acquire();
            for (int i = 0; i < MAX_NUM_CAM; i++) {
                if (null != mCaptureSession[i]) {
                    mCaptureSession[i].close();
                    mCaptureSession[i] = null;
                }
                if (null != mImageReader[i]) {
                    mImageReader[i].close();
                    mImageReader[i] = null;
                }
            }
            for (int i = 0; i < MAX_NUM_CAM; i++) {
                if (null != mCameraDevice[i]) {
                    mCameraDevice[i].close();
                    mCameraDevice[i] = null;
                    mCameraOpened[i] = false;
                }
            }
        } catch (InterruptedException e) {
            mCameraOpenCloseLock.release();
            throw new RuntimeException("Interrupted while trying to lock camera closing.", e);
        } finally {
            mCameraOpenCloseLock.release();
        }
    }

    /**
     * Starts a background thread and its {@link Handler}.
     */
    private void startBackgroundThread() {
        mCameraThread = new HandlerThread("CameraBackground");
        mCameraThread.start();
        mImageAvailableThread = new HandlerThread("CameraImageAvailable");
        mImageAvailableThread.start();
        mCallbackThread = new HandlerThread("CameraCallback");
        mCallbackThread.start();

        mCameraHandler = new MyCameraHandler(mCameraThread.getLooper());
        mImageAvailableHandler = new Handler(mImageAvailableThread.getLooper());
        mCallbackHandler = new Handler(mCallbackThread.getLooper());
    }

    /**
     * Stops the background thread and its {@link Handler}.
     */
    private void stopBackgroundThread() {
        mCameraThread.quitSafely();
        mImageAvailableThread.quitSafely();
        mCallbackThread.quitSafely();
        try {
            mCameraThread.join();
            mCameraThread = null;
            mCameraHandler = null;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        try {
            mImageAvailableThread.join();
            mImageAvailableThread = null;
            mImageAvailableHandler = null;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        try {
            mCallbackThread.join();
            mCallbackThread = null;
            mCallbackHandler = null;
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    private void openCamera(int id) {
        if (mPaused) {
            return;
        }
        Log.d(TAG, "openCamera " + id);
        CameraManager manager;
        try {
            manager = (CameraManager) mActivity.getSystemService(Context.CAMERA_SERVICE);
            mCameraId[id] = manager.getCameraIdList()[id];
            if (!mCameraOpenCloseLock.tryAcquire(5000, TimeUnit.MILLISECONDS)) {
                Log.d(TAG, "Time out waiting to lock camera opening.");
                throw new RuntimeException("Time out waiting to lock camera opening");
            }
            manager.openCamera(mCameraId[id], mStateCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onPreviewFocusChanged(boolean previewFocused) {
        mUI.onPreviewFocusChanged(previewFocused);
    }

    @Override
    public void onPauseBeforeSuper() {
        mPaused = true;
    }

    @Override
    public void onPauseAfterSuper() {
        Log.d(TAG, "onPause");
        mUI.showPreviewCover();
        if (mLocationManager != null) mLocationManager.recordLocation(false);
        stopBackgroundThread();
        closeCamera();
        mUI.onPause();
    }

    @Override
    public void onResumeBeforeSuper() {
        mPaused = false;
    }

    @Override
    public void onResumeAfterSuper() {
        Log.d(TAG, "onResume " + MODE);
        mCharacteristicsIndex = new ArrayList<>();
        setUpCameraOutputs();
        readInitialValues();
        startBackgroundThread();
        Message msg = Message.obtain();
        msg.what = OPEN_CAMERA;
        switch (MODE) {
            case DUAL_MODE:
            case BAYER_MODE:
                msg.arg1 = BAYER_ID;
                mCameraHandler.sendMessage(msg);
                break;
            case MONO_MODE:
                msg.what = OPEN_CAMERA;
                msg.arg1 = MONO_ID;
                mCameraHandler.sendMessage(msg);
                break;
        }
        if (!mFirstTimeInitialized) {
            initializeFirstTime();
        } else {
            initializeSecondTime();
        }
        mUI.hidePreviewCover();
        mUI.enableShutter(true);
    }

    @Override
    public void onConfigurationChanged(Configuration config) {

    }

    @Override
    public void onStop() {

    }

    @Override
    public void installIntentFilter() {

    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {

    }

    @Override
    public boolean onBackPressed() {
        return mUI.onBackPressed();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return false;
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        return false;
    }

    @Override
    public int onZoomChanged(int requestedZoom) {
        return 0;
    }

    @Override
    public void onZoomChanged(float requestedZoom) {
        mZoomValue = requestedZoom;

        switch (MODE) {
            case DUAL_MODE:
                applyZoomAndUpdate(BAYER_ID);
                applyZoomAndUpdate(MONO_ID);
                break;
            case BAYER_MODE:
                applyZoomAndUpdate(BAYER_ID);
                break;
            case MONO_MODE:
                applyZoomAndUpdate(MONO_ID);
                break;
        }
    }

    @Override
    public boolean isImageCaptureIntent() {
        return false;
    }

    @Override
    public boolean isCameraIdle() {
        return true;
    }

    @Override
    public void onCaptureDone() {

    }

    @Override
    public void onCaptureCancelled() {

    }

    @Override
    public void onCaptureRetake() {

    }

    @Override
    public void cancelAutoFocus() {

    }

    @Override
    public void stopPreview() {

    }

    @Override
    public int getCameraState() {
        return 0;
    }

    @Override
    public void onSingleTapUp(View view, int x, int y) {
        if (mPaused || mCameraDevice == null || !mFirstTimeInitialized || !mAutoFocusSupported ||
                !isStatePreview()) {
            return;
        }
        mUI.setFocusPosition(x, y);
        mUI.onFocusStarted();
        switch (MODE) {
            case DUAL_MODE:
                triggerFocusAtPoint(x, y, BAYER_ID);
                triggerFocusAtPoint(x, y, MONO_ID);
                break;
            case BAYER_MODE:
                triggerFocusAtPoint(x, y, BAYER_ID);
                break;
            case MONO_MODE:
                triggerFocusAtPoint(x, y, MONO_ID);
                break;
        }
    }

    private int getMainCameraId() {
        switch (MODE) {
            case DUAL_MODE:
            case BAYER_MODE:
                return BAYER_ID;
            case MONO_MODE:
                return MONO_ID;
        }
        return 0;
    }

    private boolean isStatePreview() {
        for (int i = 0; i < mState.length; i++) {
            if (mState[i] != STATE_PREVIEW) return false;
        }
        return true;
    }

    @Override
    public void onCountDownFinished() {

    }

    @Override
    public void onScreenSizeChanged(int width, int height) {

    }

    @Override
    public void onPreviewRectChanged(Rect previewRect) {

    }

    @Override
    public void updateCameraOrientation() {

    }

    @Override
    public void enableRecordingLocation(boolean enable) {
        Log.d(TAG, "CaptureModule enableRecordingLocation " + enable);
        setLocationPreference(enable ? RecordLocationPreference.VALUE_ON
                : RecordLocationPreference.VALUE_OFF);
    }

    private void setLocationPreference(String value) {
        mPreferences.edit()
                .putString(CameraSettings.KEY_RECORD_LOCATION, value)
                .apply();
        prefListener.onSharedPreferenceChanged();
    }

    @Override
    public void onPreviewUIReady() {
        if (mPaused) {
            return;
        }
        Log.d(TAG, "onPreviewUIReady");
        mSurfaceReady = true;
        switch (MODE) {
            case DUAL_MODE:
                createSession(BAYER_ID);
                createSession(MONO_ID);
                break;
            case BAYER_MODE:
                createSession(BAYER_ID);
                break;
            case MONO_MODE:
                createSession(MONO_ID);
                break;
        }
    }

    @Override
    public void onPreviewUIDestroyed() {

    }

    @Override
    public void onPreviewTextureCopied() {

    }

    @Override
    public void onCaptureTextureCopied() {

    }

    @Override
    public void onUserInteraction() {

    }

    @Override
    public boolean updateStorageHintOnResume() {
        return false;
    }

    @Override
    public void onOrientationChanged(int orientation) {
        // We keep the last known orientation. So if the user first orient
        // the camera then point the camera to floor or sky, we still have
        // the correct orientation.
        if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) return;
        int oldOrientation = mOrientation;
        mOrientation = CameraUtil.roundOrientation(orientation, mOrientation);
        if (oldOrientation != mOrientation) {
            mUI.setOrientation(mOrientation, true);
        }
    }

    @Override
    public void onShowSwitcherPopup() {

    }

    @Override
    public void onMediaSaveServiceConnected(MediaSaveService s) {
        if (mFirstTimeInitialized) {
            s.setListener(this);
        }
    }

    @Override
    public boolean arePreviewControlsVisible() {
        return false;
    }

    @Override
    public void resizeForPreviewAspectRatio() {

    }

    @Override
    public void onSwitchSavePath() {
        if (mUI.mMenuInitialized) {
            mUI.setPreference(CameraSettings.KEY_CAMERA_SAVEPATH, "1");
        } else {
            mPreferences.edit()
                    .putString(CameraSettings.KEY_CAMERA_SAVEPATH, "1")
                    .apply();
        }
        RotateTextToast.makeText(mActivity, R.string.on_switch_save_path_to_sdcard,
                Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onShutterButtonFocus(boolean pressed) {

    }

    @Override
    public void onShutterButtonClick() {
        takePicture();
    }

    @Override
    public void onShutterButtonLongClick() {

    }

    private boolean isFlashOff() {
        return readSetting(CameraSettings.KEY_FLASH_MODE).equals("off");
    }

    private void initializePreviewConfiguration(int id) {
        mPreviewRequestBuilder[id].set(CaptureRequest.CONTROL_MODE, CaptureRequest
                .CONTROL_MODE_AUTO);
        mPreviewRequestBuilder[id].set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest
                .CONTROL_AF_MODE_CONTINUOUS_PICTURE);
        mPreviewRequestBuilder[id].set(CaptureRequest.CONTROL_AF_TRIGGER, CaptureRequest
                .CONTROL_AF_TRIGGER_IDLE);
        mPreviewRequestBuilder[id].set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest
                .CONTROL_AE_MODE_ON);
        mPreviewRequestBuilder[id].set(CaptureRequest.FLASH_MODE, CaptureRequest
                .FLASH_MODE_OFF);
        applyWhiteBalance(mPreviewRequestBuilder[id]);
        applyZoom(mPreviewRequestBuilder[id], id);
    }

    private void readInitialValues() {
        for (int i = 0; i < mPreferenceGroup.size(); i++) {
            CameraPreference pref = mPreferenceGroup.get(i);
            if (pref instanceof ListPreference) {
                ListPreference listPref = (ListPreference) pref;
                storeSetting(listPref.getKey(), listPref.getValue());
            }
        }
    }

    public Rect cropRegionForZoom(int id) {
        Log.d(TAG, "cropRegionForZoom " + id);
        Rect activeRegion = mCharacteristics[id].get(CameraCharacteristics
                .SENSOR_INFO_ACTIVE_ARRAY_SIZE);
        Rect cropRegion = new Rect();

        int xCenter = activeRegion.width() / 2;
        int yCenter = activeRegion.height() / 2;
        int xDelta = (int) (activeRegion.width() / (2 * mZoomValue));
        int yDelta = (int) (activeRegion.height() / (2 * mZoomValue));
        cropRegion.set(xCenter - xDelta, yCenter - yDelta, xCenter + xDelta, yCenter + yDelta);
        mCropRegion[id] = cropRegion;
        return mCropRegion[id];
    }

    private void applyZoom(CaptureRequest.Builder request, int id) {
        request.set(CaptureRequest.SCALER_CROP_REGION, cropRegionForZoom(id));
    }

    private void applyCaptureSettings(CaptureRequest.Builder request, int id) {
        applyFlash(request);
        applyWhiteBalance(request);
        applyJpegQuality(request);
        applyZoom(request, id);
    }

    private void applyPreference(int cameraId, ListPreference pref) {
        boolean updatePreview = false;
        String key = pref.getKey();
        String value = pref.getValue();
        storeSetting(key, value);
        switch (key) {
            //Todo: CreateUISettings file and add UI preference settings to there
            case CameraSettings.KEY_JPEG_QUALITY:
                mJpegQuality = getQualityNumber(value);
                break;
            case CameraSettings.KEY_WHITE_BALANCE:
                updatePreview = true;
                applyWhiteBalance(mPreviewRequestBuilder[cameraId]);
                break;
        }
        if (updatePreview) {
            try {
                mCaptureSession[cameraId].setRepeatingRequest(mPreviewRequestBuilder[cameraId]
                        .build(), mCaptureCallback, mCameraHandler);
            } catch (CameraAccessException e) {
                e.printStackTrace();
            }
        }
    }

    private void applyZoomAndUpdate(int id) {
        applyZoom(mPreviewRequestBuilder[id], id);
        try {
            mCaptureSession[id].setRepeatingRequest(mPreviewRequestBuilder[id]
                    .build(), mCaptureCallback, mCameraHandler);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    private void storeSetting(String key, String value) {
        mSettings.put(key, value);
    }

    private String readSetting(String key) {
        return mSettings.get(key);
    }

    private void applyJpegQuality(CaptureRequest.Builder request) {
        request.set(CaptureRequest.JPEG_QUALITY, (byte) mJpegQuality);
    }

    private void applyAFRegions(CaptureRequest.Builder request, int id) {
        request.set(CaptureRequest.CONTROL_AF_REGIONS, mAFRegions[id]);
    }

    private void applyWhiteBalance(CaptureRequest.Builder request) {
        String value = readSetting(CameraSettings.KEY_WHITE_BALANCE);
        switch (value) {
            case "incandescent":
                request.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest
                        .CONTROL_AWB_MODE_INCANDESCENT);
                break;
            case "fluorescent":
                request.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest
                        .CONTROL_AWB_MODE_FLUORESCENT);
                break;
            case "auto":
                request.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest
                        .CONTROL_AWB_MODE_AUTO);
                break;
            case "daylight":
                request.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest
                        .CONTROL_AWB_MODE_DAYLIGHT);
                break;
            case "cloudy-daylight":
                request.set(CaptureRequest.CONTROL_AWB_MODE, CaptureRequest
                        .CONTROL_AWB_MODE_CLOUDY_DAYLIGHT);
                break;
        }
    }

    private Surface getPreviewSurface(int id) {
        if (MODE == DUAL_MODE && id == MONO_ID) {
            return mUI.getSurfaceHolder2().getSurface();
        } else {
            return mUI.getSurfaceHolder().getSurface();
        }
    }

    private void applyFlash(CaptureRequest.Builder request, String value) {
        switch (value) {
            case "on":
                request.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest
                        .CONTROL_AE_MODE_ON_ALWAYS_FLASH);
                request.set(CaptureRequest.FLASH_MODE, CaptureRequest
                        .FLASH_MODE_SINGLE);
                break;
            case "auto":
                request.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest
                        .CONTROL_AE_MODE_ON_AUTO_FLASH);
                break;
            case "off":
                request.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest
                        .CONTROL_AE_MODE_ON);
                request.set(CaptureRequest.FLASH_MODE, CaptureRequest
                        .FLASH_MODE_OFF);
                break;
        }
    }

    private void applyFlash(CaptureRequest.Builder request) {
        String value = readSetting(CameraSettings.KEY_FLASH_MODE);
        applyFlash(request, value);
    }

    @Override
    public void onQueueStatus(boolean full) {
        mUI.enableShutter(!full);
    }

    public void triggerFocusAtPoint(float x, float y, int id) {
        Point p;
        if (id == getMainCameraId()) {
            p = mUI.getSurfaceViewSize();
        } else {
            p = mUI.getSurfaceView2Size();
        }
        int width = p.x;
        int height = p.y;
        x = x / width;
        y = y / height;
        mAFRegions[id] = afRectangle(x, y, mCropRegion[id]);
        autoFocusTrigger(id);
    }

    private MeteringRectangle[] afRectangle(float x, float y, Rect cropRegion) {
        int side = Math.max(cropRegion.width(), cropRegion.height()) / 8;
        int xCenter = (int) (cropRegion.left + x * cropRegion.width());
        int yCenter = (int) (cropRegion.top + y * cropRegion.height());
        Rect meteringRegion = new Rect(xCenter - side / 2, yCenter - side / 2, xCenter +
                side / 2, yCenter + side / 2);

        meteringRegion.left = CameraUtil.clamp(meteringRegion.left, cropRegion.left, cropRegion
                .right);
        meteringRegion.top = CameraUtil.clamp(meteringRegion.top, cropRegion.top, cropRegion
                .bottom);
        meteringRegion.right = CameraUtil.clamp(meteringRegion.right, cropRegion.left, cropRegion
                .right);
        meteringRegion.bottom = CameraUtil.clamp(meteringRegion.bottom, cropRegion.top,
                cropRegion.bottom);
        MeteringRectangle[] meteringRectangle = new MeteringRectangle[1];
        meteringRectangle[0] = new MeteringRectangle(meteringRegion, 1);
        return meteringRectangle;
    }

    private void updateFocusStateChange(CaptureResult result) {
        final int resultAFState = result.get(CaptureResult.CONTROL_AF_STATE);

        // Report state change when AF state has changed.
        if (resultAFState != mLastResultAFState && mFocusStateListener != null) {
            mActivity.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    mFocusStateListener.onFocusStatusUpdate(resultAFState);
                }
            });
        }
        mLastResultAFState = resultAFState;
    }

    /**
     * Compares two {@code Size}s based on their areas.
     */
    static class CompareSizesByArea implements Comparator<Size> {

        @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());
        }

    }

    private class MyCameraHandler extends Handler {

        public MyCameraHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case OPEN_CAMERA: {
                    int id = msg.arg1;
                    openCamera(id);
                    break;
                }
            }
        }
    }

}