android/camera/VideoCamera.java

/*
 * Copyright (C) 2007 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 com.android.camera.ui.CamcorderHeadUpDisplay;
import com.android.camera.ui.CameraPicker;
import com.android.camera.ui.GLRootView;
import com.android.camera.ui.HeadUpDisplay;
import com.android.camera.ui.IndicatorWheel;
import com.android.camera.ui.RotateImageView;
import com.android.camera.ui.SharePopup;
import com.android.camera.ui.ZoomPicker;

import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.hardware.Camera.CameraInfo;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.Size;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.media.ThumbnailUtils;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.os.SystemClock;
import android.provider.MediaStore;
import android.provider.MediaStore.Video;
import android.provider.Settings;
import android.util.Log;
import android.view.GestureDetector;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MotionEvent;
import android.view.OrientationEventListener;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

/**
 * The Camcorder activity.
 */
public class VideoCamera extends ActivityBase
        implements View.OnClickListener,
        ShutterButton.OnShutterButtonListener, SurfaceHolder.Callback,
        MediaRecorder.OnErrorListener, MediaRecorder.OnInfoListener,
        Switcher.OnSwitchListener, PreviewFrameLayout.OnSizeChangedListener {

    private static final String TAG = "videocamera";

    private static final String LAST_THUMB_FILENAME = "video_last_thumb";

    private static final int CHECK_DISPLAY_ROTATION = 3;
    private static final int CLEAR_SCREEN_DELAY = 4;
    private static final int UPDATE_RECORD_TIME = 5;
    private static final int ENABLE_SHUTTER_BUTTON = 6;

    private static final int SCREEN_DELAY = 2 * 60 * 1000;

    // The brightness settings used when it is set to automatic in the system.
    // The reason why it is set to 0.7 is just because 1.0 is too bright.
    private static final float DEFAULT_CAMERA_BRIGHTNESS = 0.7f;

    private static final long LOW_STORAGE_THRESHOLD = 512L * 1024L;

    private static final boolean SWITCH_CAMERA = true;
    private static final boolean SWITCH_VIDEO = false;

    private static final long SHUTTER_BUTTON_TIMEOUT = 500L; // 500ms

    private static final int[] TIME_LAPSE_VIDEO_QUALITY = {
            CamcorderProfile.QUALITY_TIME_LAPSE_1080P,
            CamcorderProfile.QUALITY_TIME_LAPSE_720P,
            CamcorderProfile.QUALITY_TIME_LAPSE_480P,
            CamcorderProfile.QUALITY_TIME_LAPSE_CIF,
            CamcorderProfile.QUALITY_TIME_LAPSE_QCIF};

    private static final int[] VIDEO_QUALITY = {
            CamcorderProfile.QUALITY_1080P,
            CamcorderProfile.QUALITY_720P,
            CamcorderProfile.QUALITY_480P,
            CamcorderProfile.QUALITY_CIF,
            CamcorderProfile.QUALITY_QCIF};

    /**
     * An unpublished intent flag requesting to start recording straight away
     * and return as soon as recording is stopped.
     * TODO: consider publishing by moving into MediaStore.
     */
    private final static String EXTRA_QUICK_CAPTURE =
            "android.intent.extra.quickCapture";

    private android.hardware.Camera mCameraDevice;
    private final CameraErrorCallback mErrorCallback = new CameraErrorCallback();

    private ComboPreferences mPreferences;
    private PreferenceGroup mPreferenceGroup;

    private PreviewFrameLayout mPreviewFrameLayout;
    private SurfaceHolder mSurfaceHolder = null;
    private GLRootView mGLRootView;
    // w1024dp devices use indicator wheel. Other devices use head-up display.
    private CamcorderHeadUpDisplay mHeadUpDisplay;
    private IndicatorWheel mIndicatorWheel;
    // Front/back camera picker for w1024dp layout.
    private CameraPicker mCameraPicker;
    private View mReviewControl;

    private Toast mNoShareToast;
    // A button showing the last captured video thumbnail. Clicking on it will
    // show the share popup window.
    private RotateImageView mThumbnailButton;
    // A popup window that contains a bigger thumbnail and a list of apps to share.
    private SharePopup mSharePopup;
    // The bitmap of the last captured video thumbnail and the URI of the
    // original video.
    private Thumbnail mThumbnail;
    // An review image having same size as preview. It is displayed when
    // recording is stopped in capture intent.
    private ImageView mReviewImage;
    // A button sharing the last picture.
    private RotateImageView mShareButton;
    private RotateImageView mCameraSwitchIcon;
    private RotateImageView mVideoSwitchIcon;
    private ShutterButton mShutterButton;
    private TextView mRecordingTimeView;
    private SwitcherSet mSwitcher;

    private boolean mIsVideoCaptureIntent;
    private boolean mQuickCapture;

    private boolean mOpenCameraFail = false;
    private boolean mCameraDisabled = false;

    private long mStorageSpace;

    private MediaRecorder mMediaRecorder;
    private boolean mMediaRecorderRecording = false;
    private long mRecordingStartTime;
    private boolean mRecordingTimeCountsDown = false;
    private long mOnResumeTime;
    // The video file that the hardware camera is about to record into
    // (or is recording into.)
    private String mVideoFilename;
    private ParcelFileDescriptor mVideoFileDescriptor;

    // The video file that has already been recorded, and that is being
    // examined by the user.
    private String mCurrentVideoFilename;
    private Uri mCurrentVideoUri;
    private ContentValues mCurrentVideoValues;

    private CamcorderProfile mProfile;
    // The array of video quality profiles supported by each camera(s). Here the
    // cameraId is the index of the array to get the profile map which contain
    // the set of quality string and its real quality of a camera.
    private HashMap<String, Integer>[] mProfileQuality;
    private HashMap<String, Integer>[] mTimeLapseProfileQuality;

    // The video duration limit. 0 menas no limit.
    private int mMaxVideoDurationInMs;

    // Time Lapse parameters.
    private boolean mCaptureTimeLapse = false;
    // Default 0. If it is larger than 0, the camcorder is in time lapse mode.
    private int mTimeBetweenTimeLapseFrameCaptureMs = 0;
    private View mTimeLapseLabel;
    private View mPreviewBorder;

    private int mDesiredPreviewWidth;
    private int mDesiredPreviewHeight;

    boolean mPausing = false;
    boolean mPreviewing = false; // True if preview is started.
    // The display rotation in degrees. This is only valid when mPreviewing is
    // true.
    private int mDisplayRotation;

    private ContentResolver mContentResolver;

    private final ArrayList<MenuItem> mGalleryItems = new ArrayList<MenuItem>();

    private final Handler mHandler = new MainHandler();
    private Parameters mParameters;

    // multiple cameras support
    private int mNumberOfCameras;
    private int mCameraId;
    private int mFrontCameraId;
    private int mBackCameraId;

    private GestureDetector mPopupGestureDetector;

    private MyOrientationEventListener mOrientationListener;
    // The degrees of the device rotated clockwise from its natural orientation.
    private int mOrientation = OrientationEventListener.ORIENTATION_UNKNOWN;
    // The orientation compensation for icons and thumbnails. Ex: if the value
    // is 90, the UI components should be rotated 90 degrees counter-clockwise.
    private int mOrientationCompensation = 0;
    private int mOrientationHint; // the orientation hint for video playback

    private static final int ZOOM_STOPPED = 0;
    private static final int ZOOM_START = 1;
    private static final int ZOOM_STOPPING = 2;

    private int mZoomState = ZOOM_STOPPED;
    private boolean mSmoothZoomSupported = false;
    private int mZoomValue;  // The current zoom value.
    private int mZoomMax;
    private int mTargetZoomValue;
    private ZoomPicker mZoomPicker;
    private final ZoomListener mZoomListener = new ZoomListener();

    // This Handler is used to post message back onto the main thread of the
    // application
    private class MainHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {

                case ENABLE_SHUTTER_BUTTON:
                    mShutterButton.setEnabled(true);
                    break;

                case CLEAR_SCREEN_DELAY: {
                    getWindow().clearFlags(
                            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                    break;
                }

                case UPDATE_RECORD_TIME: {
                    updateRecordingTime();
                    break;
                }

                case CHECK_DISPLAY_ROTATION: {
                    // Restart the preview if display rotation has changed.
                    // Sometimes this happens when the device is held upside
                    // down and camera app is opened. Rotation animation will
                    // take some time and the rotation value we have got may be
                    // wrong. Framework does not have a callback for this now.
                    if ((Util.getDisplayRotation(VideoCamera.this) != mDisplayRotation)
                            && !mMediaRecorderRecording) {
                        startPreview();
                    }
                    if (SystemClock.uptimeMillis() - mOnResumeTime < 5000) {
                        mHandler.sendEmptyMessageDelayed(CHECK_DISPLAY_ROTATION, 100);
                    }
                    break;
                }

                default:
                    Log.v(TAG, "Unhandled message: " + msg.what);
                    break;
            }
        }
    }

    private BroadcastReceiver mReceiver = null;

    private class MyBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (action.equals(Intent.ACTION_MEDIA_EJECT)) {
                updateAndShowStorageHint();
                stopVideoRecording();
            } else if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {
                updateAndShowStorageHint();
                updateThumbnailButton();
            } else if (action.equals(Intent.ACTION_MEDIA_UNMOUNTED)) {
                // SD card unavailable
                // handled in ACTION_MEDIA_EJECT
            } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_STARTED)) {
                Toast.makeText(VideoCamera.this,
                        getResources().getString(R.string.wait), Toast.LENGTH_LONG).show();
            } else if (action.equals(Intent.ACTION_MEDIA_SCANNER_FINISHED)) {
                updateAndShowStorageHint();
            }
        }
    }

    private String createName(long dateTaken) {
        Date date = new Date(dateTaken);
        SimpleDateFormat dateFormat = new SimpleDateFormat(
                getString(R.string.video_file_name_format));

        return dateFormat.format(date);
    }

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        Window win = getWindow();

        // Overright the brightness settings if it is automatic
        int mode = Settings.System.getInt(
                getContentResolver(),
                Settings.System.SCREEN_BRIGHTNESS_MODE,
                Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
        if (mode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {
            WindowManager.LayoutParams winParams = win.getAttributes();
            winParams.screenBrightness = DEFAULT_CAMERA_BRIGHTNESS;
            win.setAttributes(winParams);
        }

        mPreferences = new ComboPreferences(this);
        CameraSettings.upgradeGlobalPreferences(mPreferences.getGlobal());
        mCameraId = CameraSettings.readPreferredCameraId(mPreferences);

        //Testing purpose. Launch a specific camera through the intent extras.
        int intentCameraId = Util.getCameraFacingIntentExtras(this);
        if (intentCameraId != -1) {
            mCameraId = intentCameraId;
        }

        mPreferences.setLocalId(this, mCameraId);
        CameraSettings.upgradeLocalPreferences(mPreferences.getLocal());

        mNumberOfCameras = CameraHolder.instance().getNumberOfCameras();

        /*
         * To reduce startup time, we start the preview in another thread.
         * We make sure the preview is started at the end of onCreate.
         */
        Thread startPreviewThread = new Thread(new Runnable() {
            public void run() {
                try {
                    mCameraDevice = Util.openCamera(VideoCamera.this, mCameraId);
                    readVideoPreferences();
                    startPreview();
                } catch(CameraHardwareException e) {
                    mOpenCameraFail = true;
                } catch(CameraDisabledException e) {
                    mCameraDisabled = true;
                }
            }
        });
        startPreviewThread.start();

        mContentResolver = getContentResolver();

        requestWindowFeature(Window.FEATURE_PROGRESS);
        mIsVideoCaptureIntent = isVideoCaptureIntent();
        if (mIsVideoCaptureIntent) {
            setContentView(R.layout.video_camera_attach);

            mReviewControl = findViewById(R.id.review_control);
            mReviewControl.setVisibility(View.VISIBLE);
            findViewById(R.id.btn_cancel).setOnClickListener(this);
            findViewById(R.id.btn_done).setOnClickListener(this);
            findViewById(R.id.btn_play).setOnClickListener(this);
            View retake = findViewById(R.id.btn_retake);
            retake.setOnClickListener(this);
            if (retake instanceof ImageView) {
                ((ImageView) retake).setImageResource(R.drawable.btn_ic_review_retake_video);
            } else {
                ((Button) retake).setCompoundDrawablesWithIntrinsicBounds(
                        R.drawable.ic_switch_video_holo_dark, 0, 0, 0);
            }
        } else {
            setContentView(R.layout.video_camera);

            initThumbnailButton();
            mShareButton = (RotateImageView) findViewById(R.id.btn_share);
            if (mShareButton != null) mShareButton.setOnClickListener(this);
            mSwitcher = (SwitcherSet) findViewById(R.id.camera_switch);
            mSwitcher.setVisibility(View.VISIBLE);
            mSwitcher.setOnSwitchListener(this);
        }

        mPreviewFrameLayout = (PreviewFrameLayout)
                findViewById(R.id.frame_layout);
        mPreviewFrameLayout.setOnSizeChangedListener(this);

        mReviewImage = (ImageView) findViewById(R.id.review_image);
        mCameraSwitchIcon = (RotateImageView) findViewById(R.id.camera_switch_icon);
        mVideoSwitchIcon = (RotateImageView) findViewById(R.id.video_switch_icon);

        // don't set mSurfaceHolder here. We have it set ONLY within
        // surfaceCreated / surfaceDestroyed, other parts of the code
        // assume that when it is set, the surface is also set.
        SurfaceView preview = (SurfaceView) findViewById(R.id.camera_preview);
        SurfaceHolder holder = preview.getHolder();
        holder.addCallback(this);
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        mQuickCapture = getIntent().getBooleanExtra(EXTRA_QUICK_CAPTURE, false);

        mShutterButton = (ShutterButton) findViewById(R.id.shutter_button);
        mShutterButton.setImageResource(R.drawable.btn_ic_video_record);
        mShutterButton.setOnShutterButtonListener(this);
        mShutterButton.requestFocus();

        mRecordingTimeView = (TextView) findViewById(R.id.recording_time);
        mOrientationListener = new MyOrientationEventListener(VideoCamera.this);
        mTimeLapseLabel = findViewById(R.id.time_lapse_label);
        mPreviewBorder = findViewById(R.id.preview_border);

        // Make sure preview is started.
        try {
            startPreviewThread.join();
            if (mOpenCameraFail) {
                Util.showErrorAndFinish(this, R.string.cannot_connect_camera);
                return;
            } else if (mCameraDisabled) {
                Util.showErrorAndFinish(this, R.string.camera_disabled);
                return;
            }
        } catch (InterruptedException ex) {
            // ignore
        }

        showTimeLapseUI(mCaptureTimeLapse);
        resizeForPreviewAspectRatio();

        mBackCameraId = CameraHolder.instance().getBackCameraId();
        mFrontCameraId = CameraHolder.instance().getFrontCameraId();

        // Initialize after startPreview becuase this need mParameters.
        initializeIndicatorWheel();
        // w1024dp devices use indicator wheel. Other devices use head-up display.
        if (mIndicatorWheel == null) {
            mHeadUpDisplay = new CamcorderHeadUpDisplay(this);
            mHeadUpDisplay.setListener(new MyHeadUpDisplayListener());
            initializeHeadUpDisplay();
        }
        initializeCameraPicker();
        initializeZoomPicker();
    }

    private void changeHeadUpDisplayState() {
        if (mHeadUpDisplay == null) return;
        // If the camera resumes behind the lock screen, the orientation
        // will be portrait. That causes OOM when we try to allocation GPU
        // memory for the GLSurfaceView again when the orientation changes. So,
        // we delayed initialization of HeadUpDisplay until the orientation
        // becomes landscape.
        Configuration config = getResources().getConfiguration();
        if (config.orientation == Configuration.ORIENTATION_LANDSCAPE
                && !mPausing) {
            if (mGLRootView == null) attachHeadUpDisplay();
        } else if (mGLRootView != null) {
            detachHeadUpDisplay();
        }
    }

    private void initializeCameraPicker() {
        mCameraPicker = (CameraPicker) findViewById(R.id.camera_picker);
        if (mCameraPicker != null) {
            mCameraPicker.setImageResource(R.drawable.camera_toggle_video);
            ListPreference pref = mPreferenceGroup.findPreference(
                    CameraSettings.KEY_CAMERA_ID);
            if (pref != null) {
                mCameraPicker.initialize(pref);
                mCameraPicker.setListener(new MyCameraPickerListener());
            }
        }
    }

    private void initializeZoomPicker() {
        Button zoomIncrement = (Button) findViewById(R.id.zoom_increment);
        Button zoomDecrement = (Button) findViewById(R.id.zoom_decrement);
        TextView zoomRatio = (TextView) findViewById(R.id.zoom_ratio);
        if (zoomIncrement != null && zoomDecrement != null && mParameters.isZoomSupported()) {
            mZoomPicker = new ZoomPicker(this, zoomIncrement, zoomDecrement, zoomRatio);
        }
    }

    private void loadCameraPreferences() {
        CameraSettings settings = new CameraSettings(this, mParameters,
                mCameraId, CameraHolder.instance().getCameraInfo());
        mPreferenceGroup = settings.getPreferenceGroup(R.xml.video_preferences);
    }

    private void initializeHeadUpDisplay() {
        if (mHeadUpDisplay == null) return;
        loadCameraPreferences();

        if (mIsVideoCaptureIntent) {
            mPreferenceGroup = filterPreferenceScreenByIntent(mPreferenceGroup);
        }
        mHeadUpDisplay.initialize(this, mPreferenceGroup, mOrientationCompensation);
    }

    private void attachHeadUpDisplay() {
        mHeadUpDisplay.setOrientation(mOrientationCompensation);
        ViewGroup frame = (ViewGroup) findViewById(R.id.frame);
        mGLRootView = new GLRootView(this);
        frame.addView(mGLRootView);
        mGLRootView.setContentPane(mHeadUpDisplay);
    }

    private void detachHeadUpDisplay() {
        mHeadUpDisplay.collapse();
        ((ViewGroup) mGLRootView.getParent()).removeView(mGLRootView);
        mGLRootView = null;
    }

    private boolean collapseCameraControls() {
        if (mHeadUpDisplay != null && mHeadUpDisplay.collapse()) {
            return true;
        }
        if (mIndicatorWheel != null && mIndicatorWheel.dismissSettingPopup()) {
            return true;
        }
        return false;
    }

    private void enableCameraControls(boolean enable) {
        if (mHeadUpDisplay != null) mHeadUpDisplay.setEnabled(enable);
        if (mIndicatorWheel != null) mIndicatorWheel.setEnabled(enable);
        if (mCameraPicker != null) mCameraPicker.setEnabled(enable);
        if (mSwitcher != null) mSwitcher.setEnabled(enable);
    }

    private void initializeIndicatorWheel() {
        mIndicatorWheel = (IndicatorWheel) findViewById(R.id.indicator_wheel);
        if (mIndicatorWheel == null) return;
        loadCameraPreferences();

        final String[] SETTING_KEYS = {CameraSettings.KEY_VIDEOCAMERA_FLASH_MODE};
        final String[] OTHER_SETTING_KEYS = {
                CameraSettings.KEY_VIDEO_QUALITY,
                CameraSettings.KEY_WHITE_BALANCE,
                CameraSettings.KEY_VIDEO_TIME_LAPSE_FRAME_INTERVAL};
        mIndicatorWheel.initialize(this, mPreferenceGroup, SETTING_KEYS, OTHER_SETTING_KEYS);
        mIndicatorWheel.setListener(new MyIndicatorWheelListener());
        mPopupGestureDetector = new GestureDetector(this,
                new PopupGestureListener());
    }

    public static int roundOrientation(int orientation) {
        return ((orientation + 45) / 90 * 90) % 360;
    }

    private class MyOrientationEventListener
            extends OrientationEventListener {
        public MyOrientationEventListener(Context context) {
            super(context);
        }

        @Override
        public void onOrientationChanged(int orientation) {
            if (mMediaRecorderRecording) return;
            // 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 == ORIENTATION_UNKNOWN) return;
            mOrientation = roundOrientation(orientation);
            // When the screen is unlocked, display rotation may change. Always
            // calculate the up-to-date orientationCompensation.
            int orientationCompensation = mOrientation
                    + Util.getDisplayRotation(VideoCamera.this);
            if (mOrientationCompensation != orientationCompensation) {
                mOrientationCompensation = orientationCompensation;
                if (!mIsVideoCaptureIntent) {
                    setOrientationIndicator(mOrientationCompensation);
                }
            }
        }
    }

    private void setOrientationIndicator(int degree) {
        if (mHeadUpDisplay != null) mHeadUpDisplay.setOrientation(mOrientationCompensation);
        if (mThumbnailButton != null) mThumbnailButton.setDegree(degree);
        if (mShareButton != null) mShareButton.setDegree(degree);
        if (mCameraSwitchIcon != null) mCameraSwitchIcon.setDegree(degree);
        if (mVideoSwitchIcon != null) mVideoSwitchIcon.setDegree(degree);
        if (mSharePopup != null) mSharePopup.setOrientation(degree);
    }

    private void startPlayVideoActivity() {
        Intent intent = new Intent(Intent.ACTION_VIEW, mCurrentVideoUri);
        try {
            startActivity(intent);
        } catch (ActivityNotFoundException ex) {
            Log.e(TAG, "Couldn't view video " + mCurrentVideoUri, ex);
        }
    }

    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_retake:
                deleteCurrentVideo();
                hideAlert();
                break;
            case R.id.btn_play:
                startPlayVideoActivity();
                break;
            case R.id.btn_done:
                doReturnToCaller(true);
                break;
            case R.id.btn_cancel:
                stopVideoRecording();
                doReturnToCaller(false);
                break;
            case R.id.review_thumbnail:
                if (!mMediaRecorderRecording && mThumbnail != null) {
                    Util.viewUri(mThumbnail.getUri(), this);
                }
                break;
            case R.id.btn_gallery:
                gotoGallery();
                break;
            case R.id.btn_share:
                if (!mMediaRecorderRecording && mThumbnail != null) {
                    createSharePopup();
                }
                break;
        }
    }

    public void onShutterButtonFocus(ShutterButton button, boolean pressed) {
        // Do nothing (everything happens in onShutterButtonClick).
    }

    private void onStopVideoRecording(boolean valid) {
        stopVideoRecording();
        if (mIsVideoCaptureIntent) {
            if (mQuickCapture) {
                doReturnToCaller(valid);
            } else {
                showAlert();
            }
        } else {
            getThumbnail();
        }
    }

    public void onShutterButtonClick(ShutterButton button) {
        switch (button.getId()) {
            case R.id.shutter_button:
                if (collapseCameraControls()) return;
                boolean stop = mMediaRecorderRecording;

                if (stop) {
                    onStopVideoRecording(true);
                } else {
                    startVideoRecording();
                }
                mShutterButton.setEnabled(false);

                // Keep the shutter button disabled when in video capture intent
                // mode and recording is stopped. It'll be re-enabled when
                // re-take button is clicked.
                if (!(mIsVideoCaptureIntent && stop)) {
                    mHandler.sendEmptyMessageDelayed(
                            ENABLE_SHUTTER_BUTTON, SHUTTER_BUTTON_TIMEOUT);
                }
                break;
        }
    }

    private OnScreenHint mStorageHint;

    private void updateAndShowStorageHint() {
        mStorageSpace = Storage.getAvailableSpace();
        showStorageHint();
    }

    private void showStorageHint() {
        String errorMessage = null;
        if (mStorageSpace == Storage.UNAVAILABLE) {
            errorMessage = getString(R.string.no_storage);
        } else if (mStorageSpace == Storage.PREPARING) {
            errorMessage = getString(R.string.preparing_sd);
        } else if (mStorageSpace == Storage.UNKNOWN_SIZE) {
            errorMessage = getString(R.string.access_sd_fail);
        } else if (mStorageSpace < LOW_STORAGE_THRESHOLD) {
            errorMessage = getString(R.string.spaceIsLow_content);
        }

        if (errorMessage != null) {
            if (mStorageHint == null) {
                mStorageHint = OnScreenHint.makeText(this, errorMessage);
            } else {
                mStorageHint.setText(errorMessage);
            }
            mStorageHint.show();
        } else if (mStorageHint != null) {
            mStorageHint.cancel();
            mStorageHint = null;
        }
    }

    private void readVideoPreferences() {
        String quality = mPreferences.getString(
                CameraSettings.KEY_VIDEO_QUALITY,
                CameraSettings.DEFAULT_VIDEO_QUALITY_VALUE);
        boolean videoQualityHigh =
                CameraSettings.getVideoQuality(this, quality);

        // Set video quality.
        Intent intent = getIntent();
        if (intent.hasExtra(MediaStore.EXTRA_VIDEO_QUALITY)) {
            int extraVideoQuality =
                    intent.getIntExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
            if (extraVideoQuality > 0) {
                quality = getString(R.string.pref_video_quality_high);
            } else {  // 0 is mms.
                quality = getString(R.string.pref_video_quality_mms);
            }
        }

        // Set video duration limit. The limit is read from the preference,
        // unless it is specified in the intent.
        if (intent.hasExtra(MediaStore.EXTRA_DURATION_LIMIT)) {
            int seconds =
                    intent.getIntExtra(MediaStore.EXTRA_DURATION_LIMIT, 0);
            mMaxVideoDurationInMs = 1000 * seconds;
        } else {
            mMaxVideoDurationInMs =
                    CameraSettings.getVideoDurationInMillis(this, quality, mCameraId);
        }

        // Read time lapse recording interval.
        String frameIntervalStr = mPreferences.getString(
                CameraSettings.KEY_VIDEO_TIME_LAPSE_FRAME_INTERVAL,
                getString(R.string.pref_video_time_lapse_frame_interval_default));
        mTimeBetweenTimeLapseFrameCaptureMs = Integer.parseInt(frameIntervalStr);

        mCaptureTimeLapse = (mTimeBetweenTimeLapseFrameCaptureMs != 0);
        int profileQuality = getProfileQuality(mCameraId, quality, mCaptureTimeLapse);
        mProfile = CamcorderProfile.get(mCameraId, profileQuality);
        getDesiredPreviewSize();
    }

    int getProfileQuality(int cameraId, String quality, boolean captureTimeLapse) {
        HashMap<String, Integer>[] qualityMap;
        if (captureTimeLapse) {
            if (mTimeLapseProfileQuality == null) {
                mTimeLapseProfileQuality = new HashMap[
                        CameraHolder.instance().getNumberOfCameras()];
            }
            qualityMap = mTimeLapseProfileQuality;
            if (qualityMap[cameraId] == null) {
                qualityMap[cameraId] = buildProfileQuality(cameraId, TIME_LAPSE_VIDEO_QUALITY);
            }
        } else {
            if (mProfileQuality == null) {
                mProfileQuality = new HashMap[
                        CameraHolder.instance().getNumberOfCameras()];
            }
            qualityMap = mProfileQuality;
            if (qualityMap[cameraId] == null) {
                qualityMap[cameraId] = buildProfileQuality(cameraId, VIDEO_QUALITY);
            }
        }
        return qualityMap[cameraId].get(quality);
    }

    HashMap<String, Integer> buildProfileQuality(int cameraId,
            int qualityList[]) {
        HashMap<String, Integer> qualityMap = new HashMap<String, Integer>();
        int highestQuality = -1, secondHighestQuality = -1,
                lastEffectiveQuality = -1;
        for (int i = 0; i < qualityList.length; i++) {
            if (CamcorderProfile.hasProfile(cameraId, qualityList[i])) {
                if (highestQuality == -1) {
                    highestQuality = qualityList[i];
                } else if (secondHighestQuality == -1) {
                    secondHighestQuality = qualityList[i];
                    break;
                }
                lastEffectiveQuality = qualityList[i];
            }
        }
        if (secondHighestQuality == -1) {
            secondHighestQuality = highestQuality;
        }
        qualityMap.put(getString(R.string.pref_video_quality_high), highestQuality);
        qualityMap.put(getString(R.string.pref_video_quality_low), secondHighestQuality);
        qualityMap.put(getString(R.string.pref_video_quality_youtube), highestQuality);
        qualityMap.put(getString(R.string.pref_video_quality_mms), lastEffectiveQuality);
        return qualityMap;
    }

    private void getDesiredPreviewSize() {
        mParameters = mCameraDevice.getParameters();
        if (mParameters.getSupportedVideoSizes() == null) {
            mDesiredPreviewWidth = mProfile.videoFrameWidth;
            mDesiredPreviewHeight = mProfile.videoFrameHeight;
        } else {  // Driver supports separates outputs for preview and video.
            List<Size> sizes = mParameters.getSupportedPreviewSizes();
            Size preferred = mParameters.getPreferredPreviewSizeForVideo();
            int product = preferred.width * preferred.height;
            Iterator it = sizes.iterator();
            // Remove the preview sizes that are not preferred.
            while (it.hasNext()) {
                Size size = (Size) it.next();
                if (size.width * size.height > product) {
                    it.remove();
                }
            }
            Size optimalSize = Util.getOptimalPreviewSize(this, sizes,
                (double) mProfile.videoFrameWidth / mProfile.videoFrameHeight);
            mDesiredPreviewWidth = optimalSize.width;
            mDesiredPreviewHeight = optimalSize.height;
        }
        Log.v(TAG, "mDesiredPreviewWidth=" + mDesiredPreviewWidth +
                ". mDesiredPreviewHeight=" + mDesiredPreviewHeight);
    }

    private void resizeForPreviewAspectRatio() {
        mPreviewFrameLayout.setAspectRatio(
                (double) mProfile.videoFrameWidth / mProfile.videoFrameHeight);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mPausing = false;
        if (mOpenCameraFail || mCameraDisabled) return;
        mZoomValue = 0;

        mReviewImage.setVisibility(View.GONE);

        // Start orientation listener as soon as possible because it takes
        // some time to get first orientation.
        mOrientationListener.enable();
        if (!mPreviewing) {
            try {
                mCameraDevice = Util.openCamera(this, mCameraId);
                readVideoPreferences();
                resizeForPreviewAspectRatio();
                startPreview();
            } catch(CameraHardwareException e) {
                Util.showErrorAndFinish(this, R.string.cannot_connect_camera);
                return;
            } catch(CameraDisabledException e) {
                Util.showErrorAndFinish(this, R.string.camera_disabled);
                return;
            }
        }
        keepScreenOnAwhile();

        // install an intent filter to receive SD card related events.
        IntentFilter intentFilter =
                new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);
        intentFilter.addAction(Intent.ACTION_MEDIA_EJECT);
        intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
        intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);
        intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
        intentFilter.addDataScheme("file");
        mReceiver = new MyBroadcastReceiver();
        registerReceiver(mReceiver, intentFilter);
        mStorageSpace = Storage.getAvailableSpace();

        mHandler.postDelayed(new Runnable() {
            public void run() {
                showStorageHint();
            }
        }, 200);

        changeHeadUpDisplayState();

        if (!mIsVideoCaptureIntent) {
            updateThumbnailButton();  // Update the last video thumbnail.
            mSwitcher.setSwitch(SWITCH_VIDEO);
        }

        if (mPreviewing) {
            mOnResumeTime = SystemClock.uptimeMillis();
            mHandler.sendEmptyMessageDelayed(CHECK_DISPLAY_ROTATION, 100);
        }
        initializeZoom();
    }

    private void setPreviewDisplay(SurfaceHolder holder) {
        try {
            mCameraDevice.setPreviewDisplay(holder);
        } catch (Throwable ex) {
            closeCamera();
            throw new RuntimeException("setPreviewDisplay failed", ex);
        }
    }

    private void startPreview() {
        Log.v(TAG, "startPreview");
        mCameraDevice.setErrorCallback(mErrorCallback);

        if (mPreviewing == true) {
            mCameraDevice.stopPreview();
            mPreviewing = false;
        }
        setPreviewDisplay(mSurfaceHolder);
        mDisplayRotation = Util.getDisplayRotation(this);
        Util.setCameraDisplayOrientation(mDisplayRotation, mCameraId, mCameraDevice);
        setCameraParameters();

        try {
            mCameraDevice.startPreview();
        } catch (Throwable ex) {
            closeCamera();
            throw new RuntimeException("startPreview failed", ex);
        }
        mZoomState = ZOOM_STOPPED;
        mPreviewing = true;
    }

    private void closeCamera() {
        Log.v(TAG, "closeCamera");
        if (mCameraDevice == null) {
            Log.d(TAG, "already stopped.");
            return;
        }
        CameraHolder.instance().release();
        mCameraDevice = null;
        mPreviewing = false;
    }

    private void finishRecorderAndCloseCamera() {
        // This is similar to what mShutterButton.performClick() does,
        // but not quite the same.
        if (mMediaRecorderRecording) {
            if (mIsVideoCaptureIntent) {
                stopVideoRecording();
                showAlert();
            } else {
                stopVideoRecording();
                getThumbnail();
            }
        } else {
            stopVideoRecording();
        }
        closeCamera();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mPausing = true;

        changeHeadUpDisplayState();
        if (mIndicatorWheel != null) mIndicatorWheel.dismissSettingPopup();

        finishRecorderAndCloseCamera();

        dismissSharePopup();

        if (mReceiver != null) {
            unregisterReceiver(mReceiver);
            mReceiver = null;
        }
        resetScreenOn();

        if (!mIsVideoCaptureIntent && mThumbnail != null) {
            mThumbnail.saveTo(new File(getFilesDir(), LAST_THUMB_FILENAME));
        }

        if (mStorageHint != null) {
            mStorageHint.cancel();
            mStorageHint = null;
        }

        mOrientationListener.disable();

        mHandler.removeMessages(CHECK_DISPLAY_ROTATION);
    }

    @Override
    public void onUserInteraction() {
        super.onUserInteraction();
        if (!mMediaRecorderRecording) keepScreenOnAwhile();
    }

    @Override
    public void onBackPressed() {
        if (mPausing) return;
        if (mMediaRecorderRecording) {
            onStopVideoRecording(false);
        } else if (!collapseCameraControls()) {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // Do not handle any key if the activity is paused.
        if (mPausing) {
            return true;
        }

        switch (keyCode) {
            case KeyEvent.KEYCODE_CAMERA:
                if (event.getRepeatCount() == 0) {
                    mShutterButton.performClick();
                    return true;
                }
                break;
            case KeyEvent.KEYCODE_DPAD_CENTER:
                if (event.getRepeatCount() == 0) {
                    mShutterButton.performClick();
                    return true;
                }
                break;
            case KeyEvent.KEYCODE_MENU:
                if (mMediaRecorderRecording) return true;
                break;
        }

        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        switch (keyCode) {
            case KeyEvent.KEYCODE_CAMERA:
                mShutterButton.setPressed(false);
                return true;
        }
        return super.onKeyUp(keyCode, event);
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // Make sure we have a surface in the holder before proceeding.
        if (holder.getSurface() == null) {
            Log.d(TAG, "holder.getSurface() == null");
            return;
        }

        Log.v(TAG, "surfaceChanged. w=" + w + ". h=" + h);

        mSurfaceHolder = holder;

        if (mPausing) {
            // We're pausing, the screen is off and we already stopped
            // video recording. We don't want to start the camera again
            // in this case in order to conserve power.
            // The fact that surfaceChanged is called _after_ an onPause appears
            // to be legitimate since in that case the lockscreen always returns
            // to portrait orientation possibly triggering the notification.
            return;
        }

        // The mCameraDevice will be null if it is fail to connect to the
        // camera hardware. In this case we will show a dialog and then
        // finish the activity, so it's OK to ignore it.
        if (mCameraDevice == null) return;

        // Set preview display if the surface is being created. Preview was
        // already started. Also restart the preview if display rotation has
        // changed. Sometimes this happens when the device is held in portrait
        // and camera app is opened. Rotation animation takes some time and
        // display rotation in onCreate may not be what we want.
        if (mPreviewing && (Util.getDisplayRotation(this) == mDisplayRotation)
                && holder.isCreating()) {
            setPreviewDisplay(holder);
        } else {
            stopVideoRecording();
            startPreview();
        }
    }

    public void surfaceCreated(SurfaceHolder holder) {
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        mSurfaceHolder = null;
    }

    private void gotoGallery() {
        MenuHelper.gotoCameraVideoGallery(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        if (mIsVideoCaptureIntent) {
            // No options menu for attach mode.
            return false;
        } else {
            addBaseMenuItems(menu);
        }
        return true;
    }

    private boolean isVideoCaptureIntent() {
        String action = getIntent().getAction();
        return (MediaStore.ACTION_VIDEO_CAPTURE.equals(action));
    }

    private void doReturnToCaller(boolean valid) {
        Intent resultIntent = new Intent();
        int resultCode;
        if (valid) {
            resultCode = RESULT_OK;
            resultIntent.setData(mCurrentVideoUri);
        } else {
            resultCode = RESULT_CANCELED;
        }
        setResultEx(resultCode, resultIntent);
        finish();
    }

    private void cleanupEmptyFile() {
        if (mVideoFilename != null) {
            File f = new File(mVideoFilename);
            if (f.length() == 0 && f.delete()) {
                Log.v(TAG, "Empty video file deleted: " + mVideoFilename);
                mVideoFilename = null;
            }
        }
    }

    // Prepares media recorder.
    private void initializeRecorder() {
        Log.v(TAG, "initializeRecorder");
        // If the mCameraDevice is null, then this activity is going to finish
        if (mCameraDevice == null) return;

        if (mSurfaceHolder == null) {
            Log.v(TAG, "Surface holder is null. Wait for surface changed.");
            return;
        }

        Intent intent = getIntent();
        Bundle myExtras = intent.getExtras();

        long requestedSizeLimit = 0;
        if (mIsVideoCaptureIntent && myExtras != null) {
            Uri saveUri = (Uri) myExtras.getParcelable(MediaStore.EXTRA_OUTPUT);
            if (saveUri != null) {
                try {
                    mVideoFileDescriptor =
                            mContentResolver.openFileDescriptor(saveUri, "rw");
                    mCurrentVideoUri = saveUri;
                } catch (java.io.FileNotFoundException ex) {
                    // invalid uri
                    Log.e(TAG, ex.toString());
                }
            }
            requestedSizeLimit = myExtras.getLong(MediaStore.EXTRA_SIZE_LIMIT);
        }
        mMediaRecorder = new MediaRecorder();

        // Unlock the camera object before passing it to media recorder.
        mCameraDevice.unlock();
        mMediaRecorder.setCamera(mCameraDevice);
        if (!mCaptureTimeLapse) {
            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
        }
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        mMediaRecorder.setProfile(mProfile);
        mMediaRecorder.setMaxDuration(mMaxVideoDurationInMs);
        if (mCaptureTimeLapse) {
            mMediaRecorder.setCaptureRate((1000 / (double) mTimeBetweenTimeLapseFrameCaptureMs));
        }

        // Set output file.
        // Try Uri in the intent first. If it doesn't exist, use our own
        // instead.
        if (mVideoFileDescriptor != null) {
            mMediaRecorder.setOutputFile(mVideoFileDescriptor.getFileDescriptor());
        } else {
            generateVideoFilename(mProfile.fileFormat);
            mMediaRecorder.setOutputFile(mVideoFilename);
        }

        mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());

        // Set maximum file size.
        // remaining >= LOW_STORAGE_THRESHOLD at this point, reserve a quarter
        // of that to make it more likely that recording can complete
        // successfully.
        long maxFileSize = mStorageSpace - LOW_STORAGE_THRESHOLD / 4;
        if (requestedSizeLimit > 0 && requestedSizeLimit < maxFileSize) {
            maxFileSize = requestedSizeLimit;
        }

        try {
            mMediaRecorder.setMaxFileSize(maxFileSize);
        } catch (RuntimeException exception) {
            // We are going to ignore failure of setMaxFileSize here, as
            // a) The composer selected may simply not support it, or
            // b) The underlying media framework may not handle 64-bit range
            // on the size restriction.
        }

        // See android.hardware.Camera.Parameters.setRotation for
        // documentation.
        int rotation = 0;
        if (mOrientation != OrientationEventListener.ORIENTATION_UNKNOWN) {
            CameraInfo info = CameraHolder.instance().getCameraInfo()[mCameraId];
            if (info.facing == CameraInfo.CAMERA_FACING_FRONT) {
                rotation = (info.orientation - mOrientation + 360) % 360;
            } else {  // back-facing camera
                rotation = (info.orientation + mOrientation) % 360;
            }
        }
        mMediaRecorder.setOrientationHint(rotation);
        mOrientationHint = rotation;

        try {
            mMediaRecorder.prepare();
        } catch (IOException e) {
            Log.e(TAG, "prepare failed for " + mVideoFilename, e);
            releaseMediaRecorder();
            throw new RuntimeException(e);
        }

        mMediaRecorder.setOnErrorListener(this);
        mMediaRecorder.setOnInfoListener(this);
    }

    private void releaseMediaRecorder() {
        Log.v(TAG, "Releasing media recorder.");
        if (mMediaRecorder != null) {
            cleanupEmptyFile();
            mMediaRecorder.reset();
            mMediaRecorder.release();
            mMediaRecorder = null;
        }
        mVideoFilename = null;
        if (mVideoFileDescriptor != null) {
            try {
                mVideoFileDescriptor.close();
            } catch (IOException e) {
                Log.e(TAG, "Fail to close fd", e);
            }
            mVideoFileDescriptor = null;
        }
    }

    private void generateVideoFilename(int outputFileFormat) {
        long dateTaken = System.currentTimeMillis();
        String title = createName(dateTaken);
        String filename = title + ".3gp"; // Used when emailing.
        String mime = "video/3gpp";
        if (outputFileFormat == MediaRecorder.OutputFormat.MPEG_4) {
            filename = title + ".mp4";
            mime = "video/mp4";
        }
        mVideoFilename = Storage.DIRECTORY + '/' + filename;
        mCurrentVideoValues = new ContentValues(7);
        mCurrentVideoValues.put(Video.Media.TITLE, title);
        mCurrentVideoValues.put(Video.Media.DISPLAY_NAME, filename);
        mCurrentVideoValues.put(Video.Media.DATE_TAKEN, dateTaken);
        mCurrentVideoValues.put(Video.Media.MIME_TYPE, mime);
        mCurrentVideoValues.put(Video.Media.DATA, mVideoFilename);
        Log.v(TAG, "New video filename: " + mVideoFilename);
    }

    private void registerVideo() {
        if (mVideoFileDescriptor == null) {
            Uri videoTable = Uri.parse("content://media/external/video/media");
            mCurrentVideoValues.put(Video.Media.SIZE,
                    new File(mCurrentVideoFilename).length());
            long duration = SystemClock.uptimeMillis() - mRecordingStartTime;
            if (duration > 0) {
                if (mCaptureTimeLapse) {
                    duration = getTimeLapseVideoLength(duration);
                }
                mCurrentVideoValues.put(Video.Media.DURATION, duration);
            } else {
                Log.w(TAG, "Video duration <= 0 : " + duration);
            }
            try {
                mCurrentVideoUri = mContentResolver.insert(videoTable,
                        mCurrentVideoValues);
            } catch (Exception e) {
                // We failed to insert into the database. This can happen if
                // the SD card is unmounted.
                mCurrentVideoUri = null;
                mCurrentVideoFilename = null;
            } finally {
                Log.v(TAG, "Current video URI: " + mCurrentVideoUri);
            }
        }
        mCurrentVideoValues = null;
    }

    private void deleteCurrentVideo() {
        // Remove the video and the uri if the uri is not passed in by intent.
        if (mCurrentVideoFilename != null) {
            deleteVideoFile(mCurrentVideoFilename);
            mCurrentVideoFilename = null;
            if (mCurrentVideoUri != null) {
                mContentResolver.delete(mCurrentVideoUri, null, null);
                mCurrentVideoUri = null;
            }
        }
        updateAndShowStorageHint();
    }

    private void deleteVideoFile(String fileName) {
        Log.v(TAG, "Deleting video " + fileName);
        File f = new File(fileName);
        if (!f.delete()) {
            Log.v(TAG, "Could not delete " + fileName);
        }
    }

    private void addBaseMenuItems(Menu menu) {
        MenuHelper.addSwitchModeMenuItem(menu, false, new Runnable() {
            public void run() {
                switchToCameraMode();
            }
        });
        MenuItem gallery = menu.add(Menu.NONE, Menu.NONE,
                MenuHelper.POSITION_GOTO_GALLERY,
                R.string.camera_gallery_photos_text)
                .setOnMenuItemClickListener(
                    new OnMenuItemClickListener() {
                        public boolean onMenuItemClick(MenuItem item) {
                            gotoGallery();
                            return true;
                        }
                    });
        gallery.setIcon(android.R.drawable.ic_menu_gallery);
        mGalleryItems.add(gallery);

        if (mNumberOfCameras > 1) {
            menu.add(Menu.NONE, Menu.NONE,
                    MenuHelper.POSITION_SWITCH_CAMERA_ID,
                    R.string.switch_camera_id)
                    .setOnMenuItemClickListener(new OnMenuItemClickListener() {
                public boolean onMenuItemClick(MenuItem item) {
                    CameraSettings.writePreferredCameraId(mPreferences,
                            ((mCameraId == mFrontCameraId)
                            ? mBackCameraId : mFrontCameraId));
                    onSharedPreferenceChanged();
                    return true;
                }
            }).setIcon(android.R.drawable.ic_menu_camera);
        }
    }

    private PreferenceGroup filterPreferenceScreenByIntent(
            PreferenceGroup screen) {
        Intent intent = getIntent();
        if (intent.hasExtra(MediaStore.EXTRA_VIDEO_QUALITY)) {
            CameraSettings.removePreferenceFromScreen(screen,
                    CameraSettings.KEY_VIDEO_QUALITY);
        }

        if (intent.hasExtra(MediaStore.EXTRA_DURATION_LIMIT)) {
            CameraSettings.removePreferenceFromScreen(screen,
                    CameraSettings.KEY_VIDEO_QUALITY);
        }
        return screen;
    }

    // from MediaRecorder.OnErrorListener
    public void onError(MediaRecorder mr, int what, int extra) {
        Log.e(TAG, "MediaRecorder error. what=" + what + ". extra=" + extra);
        if (what == MediaRecorder.MEDIA_RECORDER_ERROR_UNKNOWN) {
            // We may have run out of space on the sdcard.
            stopVideoRecording();
            updateAndShowStorageHint();
        }
    }

    // from MediaRecorder.OnInfoListener
    public void onInfo(MediaRecorder mr, int what, int extra) {
        if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED) {
            if (mMediaRecorderRecording) onStopVideoRecording(true);
        } else if (what
                == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED) {
            if (mMediaRecorderRecording) onStopVideoRecording(true);

            // Show the toast.
            Toast.makeText(VideoCamera.this, R.string.video_reach_size_limit,
                           Toast.LENGTH_LONG).show();
        }
    }

    /*
     * Make sure we're not recording music playing in the background, ask the
     * MediaPlaybackService to pause playback.
     */
    private void pauseAudioPlayback() {
        // Shamelessly copied from MediaPlaybackService.java, which
        // should be public, but isn't.
        Intent i = new Intent("com.android.music.musicservicecommand");
        i.putExtra("command", "pause");

        sendBroadcast(i);
    }

    // For testing.
    public boolean isRecording() {
        return mMediaRecorderRecording;
    }

    private void startVideoRecording() {
        Log.v(TAG, "startVideoRecording");

        updateAndShowStorageHint();
        if (mStorageSpace < LOW_STORAGE_THRESHOLD) {
            Log.v(TAG, "Storage issue, ignore the start request");
            return;
        }

        initializeRecorder();
        if (mMediaRecorder == null) {
            Log.e(TAG, "Fail to initialize media recorder");
            return;
        }

        pauseAudioPlayback();

        try {
            mMediaRecorder.start(); // Recording is now started
        } catch (RuntimeException e) {
            Log.e(TAG, "Could not start media recorder. ", e);
            releaseMediaRecorder();
            // If start fails, frameworks will not lock the camera for us.
            mCameraDevice.lock();
            return;
        }
        enableCameraControls(false);

        mMediaRecorderRecording = true;
        mRecordingStartTime = SystemClock.uptimeMillis();
        showRecordingUI(true);

        updateRecordingTime();
        keepScreenOn();
    }

    private void showRecordingUI(boolean recording) {
        if (recording) {
            mShutterButton.setImageDrawable(getResources().getDrawable(
                    R.drawable.btn_ic_video_record_stop));
            mShutterButton.setBackgroundResource(R.drawable.btn_shutter_recording);
            mRecordingTimeView.setText("");
            mRecordingTimeView.setVisibility(View.VISIBLE);
            if (mReviewControl != null) mReviewControl.setVisibility(View.GONE);
            if (mCaptureTimeLapse) {
                mIndicatorWheel.startTimeLapseAnimation(
                        mTimeBetweenTimeLapseFrameCaptureMs,
                        mRecordingStartTime);
            }
        } else {
            mShutterButton.setImageDrawable(getResources().getDrawable(
                    R.drawable.btn_ic_video_record));
            mShutterButton.setBackgroundResource(R.drawable.btn_shutter);
            mRecordingTimeView.setVisibility(View.GONE);
            if (mReviewControl != null) mReviewControl.setVisibility(View.VISIBLE);
            if (mCaptureTimeLapse) {
                mIndicatorWheel.stopTimeLapseAnimation();
            }
        }
    }

    private void getThumbnail() {
        if (mCurrentVideoUri != null) {
            Bitmap videoFrame = ThumbnailUtils.createVideoThumbnail(
                    mCurrentVideoFilename, Video.Thumbnails.MINI_KIND);
            if (videoFrame != null) {
                mThumbnail = new Thumbnail(mCurrentVideoUri, videoFrame, 0);
                mThumbnailButton.setBitmap(mThumbnail.getBitmap());
            }
        }
    }

    private void showAlert() {
        if (mIndicatorWheel == null) {
            fadeOut(findViewById(R.id.shutter_button));
        }
        if (mCurrentVideoFilename != null) {
            Bitmap bitmap = ThumbnailUtils.createVideoThumbnail(
                    mCurrentVideoFilename, Video.Thumbnails.MINI_KIND);
            if (bitmap != null) {
                // MetadataRetriever already rotates the thumbnail. We should rotate
                // it back (and mirror if it is front-facing camera).
                CameraInfo[] info = CameraHolder.instance().getCameraInfo();
                if (info[mCameraId].facing == CameraInfo.CAMERA_FACING_BACK) {
                    bitmap = Util.rotateAndMirror(bitmap, -mOrientationHint, false);
                } else {
                    bitmap = Util.rotateAndMirror(bitmap, -mOrientationHint, true);
                }
                mReviewImage.setImageBitmap(bitmap);
                mReviewImage.setVisibility(View.VISIBLE);
            }
        }
        int[] pickIds = {R.id.btn_retake, R.id.btn_done, R.id.btn_play};
        for (int id : pickIds) {
            View button = findViewById(id);
            fadeIn(((View) button.getParent()));
        }

        // Remove the text of the cancel button
        View view = findViewById(R.id.btn_cancel);
        if (view instanceof Button) ((Button) view).setText("");
        showTimeLapseUI(false);
    }

    private void hideAlert() {
        mReviewImage.setVisibility(View.INVISIBLE);
        fadeIn(findViewById(R.id.shutter_button));
        mShutterButton.setEnabled(true);
        enableCameraControls(true);

        // Restore the text of the cancel button
        View view = findViewById(R.id.btn_cancel);
        if (view instanceof Button) {
            ((Button) view).setText(R.string.review_cancel);
        }

        int[] pickIds = {R.id.btn_retake, R.id.btn_done, R.id.btn_play};
        for (int id : pickIds) {
            View button = findViewById(id);
            ((View) button.getParent()).setVisibility(View.GONE);
        }
        if (mCaptureTimeLapse) {
            showTimeLapseUI(true);
        }
    }

    private static void fadeIn(View view) {
        view.setVisibility(View.VISIBLE);
        Animation animation = new AlphaAnimation(0F, 1F);
        animation.setDuration(500);
        view.startAnimation(animation);
    }

    private static void fadeOut(View view) {
        view.setVisibility(View.INVISIBLE);
        Animation animation = new AlphaAnimation(1F, 0F);
        animation.setDuration(500);
        view.startAnimation(animation);
    }

    private boolean isAlertVisible() {
        return this.mReviewImage.getVisibility() == View.VISIBLE;
    }

    private void stopVideoRecording() {
        Log.v(TAG, "stopVideoRecording");
        if (mMediaRecorderRecording) {
            boolean needToRegisterRecording = false;
            mMediaRecorder.setOnErrorListener(null);
            mMediaRecorder.setOnInfoListener(null);
            try {
                mMediaRecorder.stop();
                mCurrentVideoFilename = mVideoFilename;
                Log.v(TAG, "Setting current video filename: "
                        + mCurrentVideoFilename);
                needToRegisterRecording = true;
            } catch (RuntimeException e) {
                Log.e(TAG, "stop fail",  e);
                if (mVideoFilename != null) deleteVideoFile(mVideoFilename);
            }
            mMediaRecorderRecording = false;
            showRecordingUI(false);
            if (!mIsVideoCaptureIntent) {
                enableCameraControls(true);
            }
            keepScreenOnAwhile();
            if (needToRegisterRecording && mStorageSpace >= LOW_STORAGE_THRESHOLD) {
                registerVideo();
            }
        }
        releaseMediaRecorder();  // always release media recorder
    }

    private void resetScreenOn() {
        mHandler.removeMessages(CLEAR_SCREEN_DELAY);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

    private void keepScreenOnAwhile() {
        mHandler.removeMessages(CLEAR_SCREEN_DELAY);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        mHandler.sendEmptyMessageDelayed(CLEAR_SCREEN_DELAY, SCREEN_DELAY);
    }

    private void keepScreenOn() {
        mHandler.removeMessages(CLEAR_SCREEN_DELAY);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

    private void initThumbnailButton() {
        mThumbnailButton = (RotateImageView) findViewById(R.id.review_thumbnail);
        mThumbnailButton.setOnClickListener(this);
        // Load the thumbnail from the disk.
        mThumbnail = Thumbnail.loadFrom(new File(getFilesDir(), LAST_THUMB_FILENAME));
    }

    private void updateThumbnailButton() {
        if (mThumbnail == null || !Util.isUriValid(mThumbnail.getUri(), mContentResolver)) {
            mThumbnail = Thumbnail.getLastVideoThumbnail(mContentResolver);
        }
        if (mThumbnail != null) {
            mThumbnailButton.setBitmap(mThumbnail.getBitmap());
        } else {
            mThumbnailButton.setBitmap(null);
        }
    }

    private static String millisecondToTimeString(long milliSeconds, boolean displayCentiSeconds) {
        long seconds = milliSeconds / 1000; // round down to compute seconds
        long minutes = seconds / 60;
        long hours = minutes / 60;
        long remainderMinutes = minutes - (hours * 60);
        long remainderSeconds = seconds - (minutes * 60);

        StringBuilder timeStringBuilder = new StringBuilder();

        // Hours
        if (hours > 0) {
            if (hours < 10) {
                timeStringBuilder.append('0');
            }
            timeStringBuilder.append(hours);

            timeStringBuilder.append(':');
        }

        // Minutes
        if (remainderMinutes < 10) {
            timeStringBuilder.append('0');
        }
        timeStringBuilder.append(remainderMinutes);
        timeStringBuilder.append(':');

        // Seconds
        if (remainderSeconds < 10) {
            timeStringBuilder.append('0');
        }
        timeStringBuilder.append(remainderSeconds);

        // Centi seconds
        if (displayCentiSeconds) {
            timeStringBuilder.append('.');
            long remainderCentiSeconds = (milliSeconds - seconds * 1000) / 10;
            if (remainderCentiSeconds < 10) {
                timeStringBuilder.append('0');
            }
            timeStringBuilder.append(remainderCentiSeconds);
        }

        return timeStringBuilder.toString();
    }

    private long getTimeLapseVideoLength(long deltaMs) {
        // For better approximation calculate fractional number of frames captured.
        // This will update the video time at a higher resolution.
        double numberOfFrames = (double) deltaMs / mTimeBetweenTimeLapseFrameCaptureMs;
        return (long) (numberOfFrames / mProfile.videoFrameRate * 1000);
    }

    private void updateRecordingTime() {
        if (!mMediaRecorderRecording) {
            return;
        }
        long now = SystemClock.uptimeMillis();
        long delta = now - mRecordingStartTime;

        // Starting a minute before reaching the max duration
        // limit, we'll countdown the remaining time instead.
        boolean countdownRemainingTime = (mMaxVideoDurationInMs != 0
                && delta >= mMaxVideoDurationInMs - 60000);

        long deltaAdjusted = delta;
        if (countdownRemainingTime) {
            deltaAdjusted = Math.max(0, mMaxVideoDurationInMs - deltaAdjusted) + 999;
        }
        String text;

        long targetNextUpdateDelay;
        if (!mCaptureTimeLapse) {
            text = millisecondToTimeString(deltaAdjusted, false);
            targetNextUpdateDelay = 1000;
        } else {
            // The length of time lapse video is different from the length
            // of the actual wall clock time elapsed. Display the video length
            // only in format hh:mm:ss.dd, where dd are the centi seconds.
            text = millisecondToTimeString(getTimeLapseVideoLength(delta), true);
            targetNextUpdateDelay = mTimeBetweenTimeLapseFrameCaptureMs;
        }

        mRecordingTimeView.setText(text);

        if (mRecordingTimeCountsDown != countdownRemainingTime) {
            // Avoid setting the color on every update, do it only
            // when it needs changing.
            mRecordingTimeCountsDown = countdownRemainingTime;

            int color = getResources().getColor(countdownRemainingTime
                    ? R.color.recording_time_remaining_text
                    : R.color.recording_time_elapsed_text);

            mRecordingTimeView.setTextColor(color);
        }

        long actualNextUpdateDelay = targetNextUpdateDelay - (delta % targetNextUpdateDelay);
        mHandler.sendEmptyMessageDelayed(
                UPDATE_RECORD_TIME, actualNextUpdateDelay);
    }

    private static boolean isSupported(String value, List<String> supported) {
        return supported == null ? false : supported.indexOf(value) >= 0;
    }

    private void setCameraParameters() {
        mParameters = mCameraDevice.getParameters();

        mParameters.setPreviewSize(mDesiredPreviewWidth, mDesiredPreviewHeight);
        mParameters.setPreviewFrameRate(mProfile.videoFrameRate);

        // Set flash mode.
        String flashMode = mPreferences.getString(
                CameraSettings.KEY_VIDEOCAMERA_FLASH_MODE,
                getString(R.string.pref_camera_video_flashmode_default));
        List<String> supportedFlash = mParameters.getSupportedFlashModes();
        if (isSupported(flashMode, supportedFlash)) {
            mParameters.setFlashMode(flashMode);
        } else {
            flashMode = mParameters.getFlashMode();
            if (flashMode == null) {
                flashMode = getString(
                        R.string.pref_camera_flashmode_no_flash);
            }
        }

        // Set white balance parameter.
        String whiteBalance = mPreferences.getString(
                CameraSettings.KEY_WHITE_BALANCE,
                getString(R.string.pref_camera_whitebalance_default));
        if (isSupported(whiteBalance,
                mParameters.getSupportedWhiteBalance())) {
            mParameters.setWhiteBalance(whiteBalance);
        } else {
            whiteBalance = mParameters.getWhiteBalance();
            if (whiteBalance == null) {
                whiteBalance = Parameters.WHITE_BALANCE_AUTO;
            }
        }

        // Set zoom.
        if (mParameters.isZoomSupported()) {
            mParameters.setZoom(mZoomValue);
        }

        mCameraDevice.setParameters(mParameters);
        // Keep preview size up to date.
        mParameters = mCameraDevice.getParameters();
    }

    private boolean switchToCameraMode() {
        if (isFinishing() || mMediaRecorderRecording) return false;
        MenuHelper.gotoCameraMode(VideoCamera.this);
        finish();
        return true;
    }

    public boolean onSwitchChanged(Switcher source, boolean onOff) {
        if (onOff == SWITCH_CAMERA) {
            return switchToCameraMode();
        } else {
            return true;
        }
    }

    @Override
    public void onConfigurationChanged(Configuration config) {
        super.onConfigurationChanged(config);

        // If the camera resumes behind the lock screen, the orientation
        // will be portrait. That causes OOM when we try to allocation GPU
        // memory for the GLSurfaceView again when the orientation changes. So,
        // we delayed initialization of HeadUpDisplay until the orientation
        // becomes landscape.
        changeHeadUpDisplayState();
    }

    public void onSizeChanged() {
        // TODO: update the content on GLRootView
    }

    private class MyHeadUpDisplayListener implements HeadUpDisplay.Listener {
        public void onSharedPreferenceChanged() {
            mHandler.post(new Runnable() {
                public void run() {
                    VideoCamera.this.onSharedPreferenceChanged();
                }
            });
        }

        public void onRestorePreferencesClicked() {
            mHandler.post(new Runnable() {
                public void run() {
                    VideoCamera.this.onRestorePreferencesClicked();
                }
            });
        }

        public void onPopupWindowVisibilityChanged(final int visibility) {
        }
    }

    private void onRestorePreferencesClicked() {
        Runnable runnable = new Runnable() {
            public void run() {
                restorePreferences();
            }
        };
        MenuHelper.confirmAction(this,
                getString(R.string.confirm_restore_title),
                getString(R.string.confirm_restore_message),
                runnable);
    }

    private void restorePreferences() {
        // Reset the zoom. Zoom value is not stored in preference.
        if (mParameters.isZoomSupported()) {
            mZoomValue = 0;
            setCameraParameters();
            if (mZoomPicker != null) mZoomPicker.setZoomIndex(0);
        }

        if (mHeadUpDisplay != null) {
            mHeadUpDisplay.restorePreferences(mParameters);
        }

        if (mIndicatorWheel != null) {
            mIndicatorWheel.dismissSettingPopup();
            CameraSettings.restorePreferences(VideoCamera.this, mPreferences,
                    mParameters);
            initializeIndicatorWheel();
            onSharedPreferenceChanged();
        }
    }

    private void onSharedPreferenceChanged() {
        // ignore the events after "onPause()" or preview has not started yet
        if (mPausing) return;
        synchronized (mPreferences) {
            // If mCameraDevice is not ready then we can set the parameter in
            // startPreview().
            if (mCameraDevice == null) return;

            // Check if camera id is changed.
            int cameraId = CameraSettings.readPreferredCameraId(mPreferences);
            if (mCameraId != cameraId) {
                // Restart the activity to have a crossfade animation.
                // TODO: Use SurfaceTexture to implement a better and faster
                // animation.
                if (mIsVideoCaptureIntent) {
                    // If the intent is video capture, stay in video capture mode.
                    MenuHelper.gotoVideoMode(this, getIntent());
                } else {
                    MenuHelper.gotoVideoMode(this);
                }
                finish();
            } else {
                readVideoPreferences();
                // We need to restart the preview if preview size is changed.
                Size size = mParameters.getPreviewSize();
                if (size.width != mDesiredPreviewWidth
                        || size.height != mDesiredPreviewHeight) {
                    mCameraDevice.stopPreview();
                    resizeForPreviewAspectRatio();
                    startPreview(); // Parameters will be set in startPreview().
                } else {
                    setCameraParameters();
                }
            }
            showTimeLapseUI(mCaptureTimeLapse);
        }
    }

    private void showTimeLapseUI(boolean enable) {
        if (mTimeLapseLabel != null) {
            mTimeLapseLabel.setVisibility(enable ? View.VISIBLE : View.GONE);
        }
        if (mPreviewBorder != null) {
            mPreviewBorder.setBackgroundResource(enable
                    ? R.drawable.border_preview_time_lapse
                    : R.drawable.border_preview);
        }

    }

    private void createSharePopup() {
        if (mSharePopup != null) mSharePopup.dismiss();
        mSharePopup = new SharePopup(this, mThumbnail.getUri(),
                mThumbnail.getBitmap(), mOrientationCompensation, mThumbnailButton);
        mSharePopup.showAtLocation(mThumbnailButton, Gravity.NO_GRAVITY, 0, 0);
    }

    private void dismissSharePopup() {
        if (mSharePopup != null) {
            mSharePopup.dismiss();
            mSharePopup = null;
        }
    }

    private void onShareButtonClicked() {
        if (mPausing) return;

        // Share the last captured video.
        if (mThumbnail != null) {
            Intent intent = new Intent(Intent.ACTION_SEND);
            intent.setType("video/*");
            intent.putExtra(Intent.EXTRA_STREAM, mThumbnail.getUri());
            startActivity(Intent.createChooser(intent, getString(R.string.share_video_via)));
        } else {  // No last picture
            if (mNoShareToast == null) {
                mNoShareToast = Toast.makeText(this,
                        getResources().getString(R.string.no_video_to_share), Toast.LENGTH_SHORT);
            }
            mNoShareToast.show();
        }
    }

    private class MyIndicatorWheelListener implements IndicatorWheel.Listener {
        public void onSharedPreferenceChanged() {
            VideoCamera.this.onSharedPreferenceChanged();
        }

        public void onRestorePreferencesClicked() {
            VideoCamera.this.onRestorePreferencesClicked();
        }

        public void onOverriddenPreferencesClicked() {
        }

        public void onShareButtonClicked() {
            VideoCamera.this.onShareButtonClicked();
        }
    }

    private class MyCameraPickerListener implements CameraPicker.Listener {
        public void onSharedPreferenceChanged() {
            VideoCamera.this.onSharedPreferenceChanged();
        }
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent m) {
        // Check if the popup window should be dismissed first.
        if (mPopupGestureDetector != null && mPopupGestureDetector.onTouchEvent(m)) {
            return true;
        }

        return super.dispatchTouchEvent(m);
    }

    private class PopupGestureListener extends
            GestureDetector.SimpleOnGestureListener {
        @Override
        public boolean onDown(MotionEvent e) {
            // Check if the popup window is visible.
            View popup = mIndicatorWheel.getActiveSettingPopup();
            if (popup == null) return false;

            // Let popup window or indicator wheel handle the event by
            // themselves. Dismiss the popup window if users touch on other
            // areas.
            if (!Util.pointInView(e.getX(), e.getY(), popup)
                    && !Util.pointInView(e.getX(), e.getY(), mIndicatorWheel)) {
                mIndicatorWheel.dismissSettingPopup();
                // Let event fall through.
            }
            return false;
        }
    }

    private void initializeZoom() {
        if (!mParameters.isZoomSupported()) return;

        mZoomMax = mParameters.getMaxZoom();
        mSmoothZoomSupported = mParameters.isSmoothZoomSupported();
        if (mZoomPicker != null) {
            mZoomPicker.setZoomRatios(Util.convertZoomRatios(mParameters.getZoomRatios()));
            mZoomPicker.setZoomIndex(mParameters.getZoom());
            mZoomPicker.setSmoothZoomSupported(mSmoothZoomSupported);
            mZoomPicker.setOnZoomChangeListener(
                    new ZoomPicker.OnZoomChangedListener() {
                // only for immediate zoom
                @Override
                public void onZoomValueChanged(int index) {
                    VideoCamera.this.onZoomValueChanged(index);
                }

                // only for smooth zoom
                @Override
                public void onZoomStateChanged(int state) {
                    if (mPausing) return;

                    Log.v(TAG, "zoom picker state=" + state);
                    if (state == ZoomPicker.ZOOM_IN) {
                        VideoCamera.this.onZoomValueChanged(mZoomMax);
                    } else if (state == ZoomPicker.ZOOM_OUT){
                        VideoCamera.this.onZoomValueChanged(0);
                    } else {
                        mTargetZoomValue = -1;
                        if (mZoomState == ZOOM_START) {
                            mZoomState = ZOOM_STOPPING;
                            mCameraDevice.stopSmoothZoom();
                        }
                    }
                }
            });
        }

        mCameraDevice.setZoomChangeListener(mZoomListener);
    }

    private final class ZoomListener
            implements android.hardware.Camera.OnZoomChangeListener {
        @Override
        public void onZoomChange(int value, boolean stopped, android.hardware.Camera camera) {
            Log.v(TAG, "Zoom changed: value=" + value + ". stopped="+ stopped);
            mZoomValue = value;

            // Update the UI when we get zoom value.
            if (mZoomPicker != null) mZoomPicker.setZoomIndex(value);

            // Keep mParameters up to date. We do not getParameter again in
            // takePicture. If we do not do this, wrong zoom value will be set.
            mParameters.setZoom(value);

            if (stopped && mZoomState != ZOOM_STOPPED) {
                if (mTargetZoomValue != -1 && value != mTargetZoomValue) {
                    mCameraDevice.startSmoothZoom(mTargetZoomValue);
                    mZoomState = ZOOM_START;
                } else {
                    mZoomState = ZOOM_STOPPED;
                }
            }
        }
    }

    private void onZoomValueChanged(int index) {
        // Not useful to change zoom value when the activity is paused.
        if (mPausing) return;

        if (mSmoothZoomSupported) {
            if (mTargetZoomValue != index && mZoomState != ZOOM_STOPPED) {
                mTargetZoomValue = index;
                if (mZoomState == ZOOM_START) {
                    mZoomState = ZOOM_STOPPING;
                    mCameraDevice.stopSmoothZoom();
                }
            } else if (mZoomState == ZOOM_STOPPED && mZoomValue != index) {
                mTargetZoomValue = index;
                mCameraDevice.startSmoothZoom(index);
                mZoomState = ZOOM_START;
            }
        } else {
            mZoomValue = index;
            setCameraParameters();
        }
    }
}