/*
 * Copyright (C) 2013 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 android.hardware.camera2;

import android.hardware.camera2.impl.CameraMetadataNative;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * The base class for camera controls and information.
 *
 * <p>
 * This class defines the basic key/value map used for querying for camera
 * characteristics or capture results, and for setting camera request
 * parameters.
 * </p>
 *
 * <p>
 * All instances of CameraMetadata are immutable. The list of keys with {@link #getKeys()}
 * never changes, nor do the values returned by any key with {@link #get} throughout
 * the lifetime of the object.
 * </p>
 *
 * @see CameraDevice
 * @see CameraManager
 * @see CameraCharacteristics
 **/
public abstract class CameraMetadata {

    /**
     * Set a camera metadata field to a value. The field definitions can be
     * found in {@link CameraCharacteristics}, {@link CaptureResult}, and
     * {@link CaptureRequest}.
     *
     * @param key The metadata field to write.
     * @param value The value to set the field to, which must be of a matching
     * type to the key.
     *
     * @hide
     */
    protected CameraMetadata() {
    }

    /**
     * Get a camera metadata field value.
     *
     * <p>The field definitions can be
     * found in {@link CameraCharacteristics}, {@link CaptureResult}, and
     * {@link CaptureRequest}.</p>
     *
     * <p>Querying the value for the same key more than once will return a value
     * which is equal to the previous queried value.</p>
     *
     * @throws IllegalArgumentException if the key was not valid
     *
     * @param key The metadata field to read.
     * @return The value of that key, or {@code null} if the field is not set.
     */
    public abstract <T> T get(Key<T> key);

    /**
     * Returns a list of the keys contained in this map.
     *
     * <p>The list returned is not modifiable, so any attempts to modify it will throw
     * a {@code UnsupportedOperationException}.</p>
     *
     * <p>All values retrieved by a key from this list with {@link #get} are guaranteed to be
     * non-{@code null}. Each key is only listed once in the list. The order of the keys
     * is undefined.</p>
     *
     * @return List of the keys contained in this map.
     */
    public List<Key<?>> getKeys() {
        return Collections.unmodifiableList(getKeysStatic(this.getClass(), this));
    }

    /**
     * Return a list of all the Key<?> that are declared as a field inside of the class
     * {@code type}.
     *
     * <p>
     * Optionally, if {@code instance} is not null, then filter out any keys with null values.
     * </p>
     */
    /*package*/ static ArrayList<Key<?>> getKeysStatic(Class<? extends CameraMetadata> type,
            CameraMetadata instance) {
        ArrayList<Key<?>> keyList = new ArrayList<Key<?>>();

        Field[] fields = type.getDeclaredFields();
        for (Field field : fields) {
            // Filter for Keys that are public
            if (field.getType().isAssignableFrom(Key.class) &&
                    (field.getModifiers() & Modifier.PUBLIC) != 0) {
                Key<?> key;
                try {
                    key = (Key<?>) field.get(instance);
                } catch (IllegalAccessException e) {
                    throw new AssertionError("Can't get IllegalAccessException", e);
                } catch (IllegalArgumentException e) {
                    throw new AssertionError("Can't get IllegalArgumentException", e);
                }
                if (instance == null || instance.get(key) != null) {
                    keyList.add(key);
                }
            }
        }

        return keyList;
    }

    public static class Key<T> {

        private boolean mHasTag;
        private int mTag;
        private final Class<T> mType;
        private final String mName;

        /**
         * @hide
         */
        public Key(String name, Class<T> type) {
            if (name == null) {
                throw new NullPointerException("Key needs a valid name");
            } else if (type == null) {
                throw new NullPointerException("Type needs to be non-null");
            }
            mName = name;
            mType = type;
        }

        public final String getName() {
            return mName;
        }

        @Override
        public final int hashCode() {
            return mName.hashCode();
        }

        @Override
        @SuppressWarnings("unchecked")
        public final boolean equals(Object o) {
            if (this == o) {
                return true;
            }

            if (!(o instanceof Key)) {
                return false;
            }

            Key lhs = (Key) o;

            return mName.equals(lhs.mName);
        }

        /**
         * <p>
         * Get the tag corresponding to this key. This enables insertion into the
         * native metadata.
         * </p>
         *
         * <p>This value is looked up the first time, and cached subsequently.</p>
         *
         * @return The tag numeric value corresponding to the string
         *
         * @hide
         */
        public final int getTag() {
            if (!mHasTag) {
                mTag = CameraMetadataNative.getTag(mName);
                mHasTag = true;
            }
            return mTag;
        }

        /**
         * @hide
         */
        public final Class<T> getType() {
            return mType;
        }
    }

    /*@O~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
     * The enum values below this point are generated from metadata
     * definitions in /system/media/camera/docs. Do not modify by hand or
     * modify the comment blocks at the start or end.
     *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~*/

    //
    // Enumeration values for CameraCharacteristics#LENS_FACING
    //

    /**
     * @see CameraCharacteristics#LENS_FACING
     */
    public static final int LENS_FACING_FRONT = 0;

    /**
     * @see CameraCharacteristics#LENS_FACING
     */
    public static final int LENS_FACING_BACK = 1;

    //
    // Enumeration values for CameraCharacteristics#LED_AVAILABLE_LEDS
    //

    /**
     * <p>
     * android.led.transmit control is used
     * </p>
     * @see CameraCharacteristics#LED_AVAILABLE_LEDS
     * @hide
     */
    public static final int LED_AVAILABLE_LEDS_TRANSMIT = 0;

    //
    // Enumeration values for CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
    //

    /**
     * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
     */
    public static final int INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED = 0;

    /**
     * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
     */
    public static final int INFO_SUPPORTED_HARDWARE_LEVEL_FULL = 1;

    //
    // Enumeration values for CaptureRequest#COLOR_CORRECTION_MODE
    //

    /**
     * <p>
     * Use the android.colorCorrection.transform matrix
     * and android.colorCorrection.gains to do color conversion
     * </p>
     * @see CaptureRequest#COLOR_CORRECTION_MODE
     */
    public static final int COLOR_CORRECTION_MODE_TRANSFORM_MATRIX = 0;

    /**
     * <p>
     * Must not slow down frame rate relative to raw
     * bayer output
     * </p>
     * @see CaptureRequest#COLOR_CORRECTION_MODE
     */
    public static final int COLOR_CORRECTION_MODE_FAST = 1;

    /**
     * <p>
     * Frame rate may be reduced by high
     * quality
     * </p>
     * @see CaptureRequest#COLOR_CORRECTION_MODE
     */
    public static final int COLOR_CORRECTION_MODE_HIGH_QUALITY = 2;

    //
    // Enumeration values for CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
    //

    /**
     * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
     */
    public static final int CONTROL_AE_ANTIBANDING_MODE_OFF = 0;

    /**
     * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
     */
    public static final int CONTROL_AE_ANTIBANDING_MODE_50HZ = 1;

    /**
     * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
     */
    public static final int CONTROL_AE_ANTIBANDING_MODE_60HZ = 2;

    /**
     * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
     */
    public static final int CONTROL_AE_ANTIBANDING_MODE_AUTO = 3;

    //
    // Enumeration values for CaptureRequest#CONTROL_AE_MODE
    //

    /**
     * <p>
     * Autoexposure is disabled; sensor.exposureTime,
     * sensor.sensitivity and sensor.frameDuration are used
     * </p>
     * @see CaptureRequest#CONTROL_AE_MODE
     */
    public static final int CONTROL_AE_MODE_OFF = 0;

    /**
     * <p>
     * Autoexposure is active, no flash
     * control
     * </p>
     * @see CaptureRequest#CONTROL_AE_MODE
     */
    public static final int CONTROL_AE_MODE_ON = 1;

    /**
     * <p>
     * if flash exists Autoexposure is active, auto
     * flash control; flash may be fired when precapture
     * trigger is activated, and for captures for which
     * captureIntent = STILL_CAPTURE
     * </p>
     * @see CaptureRequest#CONTROL_AE_MODE
     */
    public static final int CONTROL_AE_MODE_ON_AUTO_FLASH = 2;

    /**
     * <p>
     * if flash exists Autoexposure is active, auto
     * flash control for precapture trigger and always flash
     * when captureIntent = STILL_CAPTURE
     * </p>
     * @see CaptureRequest#CONTROL_AE_MODE
     */
    public static final int CONTROL_AE_MODE_ON_ALWAYS_FLASH = 3;

    /**
     * <p>
     * optional Automatic red eye reduction with flash.
     * If deemed necessary, red eye reduction sequence should
     * fire when precapture trigger is activated, and final
     * flash should fire when captureIntent =
     * STILL_CAPTURE
     * </p>
     * @see CaptureRequest#CONTROL_AE_MODE
     */
    public static final int CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE = 4;

    //
    // Enumeration values for CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
    //

    /**
     * <p>
     * The trigger is idle.
     * </p>
     * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
     */
    public static final int CONTROL_AE_PRECAPTURE_TRIGGER_IDLE = 0;

    /**
     * <p>
     * The precapture metering sequence
     * must be started. The exact effect of the precapture
     * trigger depends on the current AE mode and
     * state.
     * </p>
     * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
     */
    public static final int CONTROL_AE_PRECAPTURE_TRIGGER_START = 1;

    //
    // Enumeration values for CaptureRequest#CONTROL_AF_MODE
    //

    /**
     * <p>
     * The 3A routines do not control the lens;
     * android.lens.focusDistance is controlled by the
     * application
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_OFF = 0;

    /**
     * <p>
     * if lens is not fixed focus.
     * </p><p>
     * Use android.lens.minimumFocusDistance to determine if lens
     * is fixed focus In this mode, the lens does not move unless
     * the autofocus trigger action is called. When that trigger
     * is activated, AF must transition to ACTIVE_SCAN, then to
     * the outcome of the scan (FOCUSED or
     * NOT_FOCUSED).
     * </p><p>
     * Triggering cancel AF resets the lens position to default,
     * and sets the AF state to INACTIVE.
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_AUTO = 1;

    /**
     * <p>
     * In this mode, the lens does not move unless the
     * autofocus trigger action is called.
     * </p><p>
     * When that trigger is activated, AF must transition to
     * ACTIVE_SCAN, then to the outcome of the scan (FOCUSED or
     * NOT_FOCUSED).  Triggering cancel AF resets the lens
     * position to default, and sets the AF state to
     * INACTIVE.
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_MACRO = 2;

    /**
     * <p>
     * In this mode, the AF algorithm modifies the lens
     * position continually to attempt to provide a
     * constantly-in-focus image stream.
     * </p><p>
     * The focusing behavior should be suitable for good quality
     * video recording; typically this means slower focus
     * movement and no overshoots. When the AF trigger is not
     * involved, the AF algorithm should start in INACTIVE state,
     * and then transition into PASSIVE_SCAN and PASSIVE_FOCUSED
     * states as appropriate. When the AF trigger is activated,
     * the algorithm should immediately transition into
     * AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the
     * lens position until a cancel AF trigger is received.
     * </p><p>
     * Once cancel is received, the algorithm should transition
     * back to INACTIVE and resume passive scan. Note that this
     * behavior is not identical to CONTINUOUS_PICTURE, since an
     * ongoing PASSIVE_SCAN must immediately be
     * canceled.
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_CONTINUOUS_VIDEO = 3;

    /**
     * <p>
     * In this mode, the AF algorithm modifies the lens
     * position continually to attempt to provide a
     * constantly-in-focus image stream.
     * </p><p>
     * The focusing behavior should be suitable for still image
     * capture; typically this means focusing as fast as
     * possible. When the AF trigger is not involved, the AF
     * algorithm should start in INACTIVE state, and then
     * transition into PASSIVE_SCAN and PASSIVE_FOCUSED states as
     * appropriate as it attempts to maintain focus. When the AF
     * trigger is activated, the algorithm should finish its
     * PASSIVE_SCAN if active, and then transition into
     * AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the
     * lens position until a cancel AF trigger is received.
     * </p><p>
     * When the AF cancel trigger is activated, the algorithm
     * should transition back to INACTIVE and then act as if it
     * has just been started.
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_CONTINUOUS_PICTURE = 4;

    /**
     * <p>
     * Extended depth of field (digital focus). AF
     * trigger is ignored, AF state should always be
     * INACTIVE.
     * </p>
     * @see CaptureRequest#CONTROL_AF_MODE
     */
    public static final int CONTROL_AF_MODE_EDOF = 5;

    //
    // Enumeration values for CaptureRequest#CONTROL_AF_TRIGGER
    //

    /**
     * <p>
     * The trigger is idle.
     * </p>
     * @see CaptureRequest#CONTROL_AF_TRIGGER
     */
    public static final int CONTROL_AF_TRIGGER_IDLE = 0;

    /**
     * <p>
     * Autofocus must trigger now.
     * </p>
     * @see CaptureRequest#CONTROL_AF_TRIGGER
     */
    public static final int CONTROL_AF_TRIGGER_START = 1;

    /**
     * <p>
     * Autofocus must return to initial
     * state, and cancel any active trigger.
     * </p>
     * @see CaptureRequest#CONTROL_AF_TRIGGER
     */
    public static final int CONTROL_AF_TRIGGER_CANCEL = 2;

    //
    // Enumeration values for CaptureRequest#CONTROL_AWB_MODE
    //

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_OFF = 0;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_AUTO = 1;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_INCANDESCENT = 2;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_FLUORESCENT = 3;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_WARM_FLUORESCENT = 4;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_DAYLIGHT = 5;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_CLOUDY_DAYLIGHT = 6;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_TWILIGHT = 7;

    /**
     * @see CaptureRequest#CONTROL_AWB_MODE
     */
    public static final int CONTROL_AWB_MODE_SHADE = 8;

    //
    // Enumeration values for CaptureRequest#CONTROL_CAPTURE_INTENT
    //

    /**
     * <p>
     * This request doesn't fall into the other
     * categories. Default to preview-like
     * behavior.
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_CUSTOM = 0;

    /**
     * <p>
     * This request is for a preview-like usecase. The
     * precapture trigger may be used to start off a metering
     * w/flash sequence
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_PREVIEW = 1;

    /**
     * <p>
     * This request is for a still capture-type
     * usecase.
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_STILL_CAPTURE = 2;

    /**
     * <p>
     * This request is for a video recording
     * usecase.
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_VIDEO_RECORD = 3;

    /**
     * <p>
     * This request is for a video snapshot (still
     * image while recording video) usecase
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT = 4;

    /**
     * <p>
     * This request is for a ZSL usecase; the
     * application will stream full-resolution images and
     * reprocess one or several later for a final
     * capture
     * </p>
     * @see CaptureRequest#CONTROL_CAPTURE_INTENT
     */
    public static final int CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG = 5;

    //
    // Enumeration values for CaptureRequest#CONTROL_EFFECT_MODE
    //

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_OFF = 0;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_MONO = 1;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_NEGATIVE = 2;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_SOLARIZE = 3;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_SEPIA = 4;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_POSTERIZE = 5;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_WHITEBOARD = 6;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_BLACKBOARD = 7;

    /**
     * @see CaptureRequest#CONTROL_EFFECT_MODE
     */
    public static final int CONTROL_EFFECT_MODE_AQUA = 8;

    //
    // Enumeration values for CaptureRequest#CONTROL_MODE
    //

    /**
     * <p>
     * Full application control of pipeline. All 3A
     * routines are disabled, no other settings in
     * android.control.* have any effect
     * </p>
     * @see CaptureRequest#CONTROL_MODE
     */
    public static final int CONTROL_MODE_OFF = 0;

    /**
     * <p>
     * Use settings for each individual 3A routine.
     * Manual control of capture parameters is disabled. All
     * controls in android.control.* besides sceneMode take
     * effect
     * </p>
     * @see CaptureRequest#CONTROL_MODE
     */
    public static final int CONTROL_MODE_AUTO = 1;

    /**
     * <p>
     * Use specific scene mode. Enabling this disables
     * control.aeMode, control.awbMode and control.afMode
     * controls; the HAL must ignore those settings while
     * USE_SCENE_MODE is active (except for FACE_PRIORITY
     * scene mode). Other control entries are still active.
     * This setting can only be used if availableSceneModes !=
     * UNSUPPORTED
     * </p>
     * @see CaptureRequest#CONTROL_MODE
     */
    public static final int CONTROL_MODE_USE_SCENE_MODE = 2;

    //
    // Enumeration values for CaptureRequest#CONTROL_SCENE_MODE
    //

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_UNSUPPORTED = 0;

    /**
     * <p>
     * if face detection support exists Use face
     * detection data to drive 3A routines. If face detection
     * statistics are disabled, should still operate correctly
     * (but not return face detection statistics to the
     * framework).
     * </p><p>
     * Unlike the other scene modes, aeMode, awbMode, and afMode
     * remain active when FACE_PRIORITY is set. This is due to
     * compatibility concerns with the old camera
     * API
     * </p>
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_FACE_PRIORITY = 1;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_ACTION = 2;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_PORTRAIT = 3;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_LANDSCAPE = 4;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_NIGHT = 5;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_NIGHT_PORTRAIT = 6;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_THEATRE = 7;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_BEACH = 8;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_SNOW = 9;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_SUNSET = 10;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_STEADYPHOTO = 11;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_FIREWORKS = 12;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_SPORTS = 13;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_PARTY = 14;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_CANDLELIGHT = 15;

    /**
     * @see CaptureRequest#CONTROL_SCENE_MODE
     */
    public static final int CONTROL_SCENE_MODE_BARCODE = 16;

    //
    // Enumeration values for CaptureRequest#EDGE_MODE
    //

    /**
     * <p>
     * No edge enhancement is applied
     * </p>
     * @see CaptureRequest#EDGE_MODE
     */
    public static final int EDGE_MODE_OFF = 0;

    /**
     * <p>
     * Must not slow down frame rate relative to raw
     * bayer output
     * </p>
     * @see CaptureRequest#EDGE_MODE
     */
    public static final int EDGE_MODE_FAST = 1;

    /**
     * <p>
     * Frame rate may be reduced by high
     * quality
     * </p>
     * @see CaptureRequest#EDGE_MODE
     */
    public static final int EDGE_MODE_HIGH_QUALITY = 2;

    //
    // Enumeration values for CaptureRequest#FLASH_MODE
    //

    /**
     * <p>
     * Do not fire the flash for this
     * capture
     * </p>
     * @see CaptureRequest#FLASH_MODE
     */
    public static final int FLASH_MODE_OFF = 0;

    /**
     * <p>
     * if android.flash.available is true Fire flash
     * for this capture based on firingPower,
     * firingTime.
     * </p>
     * @see CaptureRequest#FLASH_MODE
     */
    public static final int FLASH_MODE_SINGLE = 1;

    /**
     * <p>
     * if android.flash.available is true Flash
     * continuously on, power set by
     * firingPower
     * </p>
     * @see CaptureRequest#FLASH_MODE
     */
    public static final int FLASH_MODE_TORCH = 2;

    //
    // Enumeration values for CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
    //

    /**
     * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
     */
    public static final int LENS_OPTICAL_STABILIZATION_MODE_OFF = 0;

    /**
     * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
     */
    public static final int LENS_OPTICAL_STABILIZATION_MODE_ON = 1;

    //
    // Enumeration values for CaptureRequest#NOISE_REDUCTION_MODE
    //

    /**
     * <p>
     * No noise reduction is applied
     * </p>
     * @see CaptureRequest#NOISE_REDUCTION_MODE
     */
    public static final int NOISE_REDUCTION_MODE_OFF = 0;

    /**
     * <p>
     * Must not slow down frame rate relative to raw
     * bayer output
     * </p>
     * @see CaptureRequest#NOISE_REDUCTION_MODE
     */
    public static final int NOISE_REDUCTION_MODE_FAST = 1;

    /**
     * <p>
     * May slow down frame rate to provide highest
     * quality
     * </p>
     * @see CaptureRequest#NOISE_REDUCTION_MODE
     */
    public static final int NOISE_REDUCTION_MODE_HIGH_QUALITY = 2;

    //
    // Enumeration values for CaptureRequest#STATISTICS_FACE_DETECT_MODE
    //

    /**
     * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
     */
    public static final int STATISTICS_FACE_DETECT_MODE_OFF = 0;

    /**
     * <p>
     * Optional Return rectangle and confidence
     * only
     * </p>
     * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
     */
    public static final int STATISTICS_FACE_DETECT_MODE_SIMPLE = 1;

    /**
     * <p>
     * Optional Return all face
     * metadata
     * </p>
     * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
     */
    public static final int STATISTICS_FACE_DETECT_MODE_FULL = 2;

    //
    // Enumeration values for CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
    //

    /**
     * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
     */
    public static final int STATISTICS_LENS_SHADING_MAP_MODE_OFF = 0;

    /**
     * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
     */
    public static final int STATISTICS_LENS_SHADING_MAP_MODE_ON = 1;

    //
    // Enumeration values for CaptureRequest#TONEMAP_MODE
    //

    /**
     * <p>
     * Use the tone mapping curve specified in
     * android.tonemap.curve
     * </p>
     * @see CaptureRequest#TONEMAP_MODE
     */
    public static final int TONEMAP_MODE_CONTRAST_CURVE = 0;

    /**
     * <p>
     * Must not slow down frame rate relative to raw
     * bayer output
     * </p>
     * @see CaptureRequest#TONEMAP_MODE
     */
    public static final int TONEMAP_MODE_FAST = 1;

    /**
     * <p>
     * Frame rate may be reduced by high
     * quality
     * </p>
     * @see CaptureRequest#TONEMAP_MODE
     */
    public static final int TONEMAP_MODE_HIGH_QUALITY = 2;

    //
    // Enumeration values for CaptureResult#CONTROL_AE_STATE
    //

    /**
     * <p>
     * AE is off.  When a camera device is opened, it starts in
     * this state.
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_INACTIVE = 0;

    /**
     * <p>
     * AE doesn't yet have a good set of control values
     * for the current scene
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_SEARCHING = 1;

    /**
     * <p>
     * AE has a good set of control values for the
     * current scene
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_CONVERGED = 2;

    /**
     * <p>
     * AE has been locked (aeMode =
     * LOCKED)
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_LOCKED = 3;

    /**
     * <p>
     * AE has a good set of control values, but flash
     * needs to be fired for good quality still
     * capture
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_FLASH_REQUIRED = 4;

    /**
     * <p>
     * AE has been asked to do a precapture sequence
     * (through the
     * trigger_action(CAMERA2_TRIGGER_PRECAPTURE_METERING)
     * call), and is currently executing it. Once PRECAPTURE
     * completes, AE will transition to CONVERGED or
     * FLASH_REQUIRED as appropriate
     * </p>
     * @see CaptureResult#CONTROL_AE_STATE
     */
    public static final int CONTROL_AE_STATE_PRECAPTURE = 5;

    //
    // Enumeration values for CaptureResult#CONTROL_AF_STATE
    //

    /**
     * <p>
     * AF off or has not yet tried to scan/been asked
     * to scan.  When a camera device is opened, it starts in
     * this state.
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_INACTIVE = 0;

    /**
     * <p>
     * if CONTINUOUS_* modes are supported. AF is
     * currently doing an AF scan initiated by a continuous
     * autofocus mode
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_PASSIVE_SCAN = 1;

    /**
     * <p>
     * if CONTINUOUS_* modes are supported. AF currently
     * believes it is in focus, but may restart scanning at
     * any time.
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_PASSIVE_FOCUSED = 2;

    /**
     * <p>
     * if AUTO or MACRO modes are supported. AF is doing
     * an AF scan because it was triggered by AF
     * trigger
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_ACTIVE_SCAN = 3;

    /**
     * <p>
     * if any AF mode besides OFF is supported. AF
     * believes it is focused correctly and is
     * locked
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_FOCUSED_LOCKED = 4;

    /**
     * <p>
     * if any AF mode besides OFF is supported. AF has
     * failed to focus successfully and is
     * locked
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_NOT_FOCUSED_LOCKED = 5;

    /**
     * <p>
     * if CONTINUOUS_* modes are supported. AF finished a
     * passive scan without finding focus, and may restart
     * scanning at any time.
     * </p>
     * @see CaptureResult#CONTROL_AF_STATE
     */
    public static final int CONTROL_AF_STATE_PASSIVE_UNFOCUSED = 6;

    //
    // Enumeration values for CaptureResult#CONTROL_AWB_STATE
    //

    /**
     * <p>
     * AWB is not in auto mode.  When a camera device is opened, it
     * starts in this state.
     * </p>
     * @see CaptureResult#CONTROL_AWB_STATE
     */
    public static final int CONTROL_AWB_STATE_INACTIVE = 0;

    /**
     * <p>
     * AWB doesn't yet have a good set of control
     * values for the current scene
     * </p>
     * @see CaptureResult#CONTROL_AWB_STATE
     */
    public static final int CONTROL_AWB_STATE_SEARCHING = 1;

    /**
     * <p>
     * AWB has a good set of control values for the
     * current scene
     * </p>
     * @see CaptureResult#CONTROL_AWB_STATE
     */
    public static final int CONTROL_AWB_STATE_CONVERGED = 2;

    /**
     * <p>
     * AE has been locked (aeMode =
     * LOCKED)
     * </p>
     * @see CaptureResult#CONTROL_AWB_STATE
     */
    public static final int CONTROL_AWB_STATE_LOCKED = 3;

    //
    // Enumeration values for CaptureResult#FLASH_STATE
    //

    /**
     * <p>
     * No flash on camera
     * </p>
     * @see CaptureResult#FLASH_STATE
     */
    public static final int FLASH_STATE_UNAVAILABLE = 0;

    /**
     * <p>
     * if android.flash.available is true Flash is
     * charging and cannot be fired
     * </p>
     * @see CaptureResult#FLASH_STATE
     */
    public static final int FLASH_STATE_CHARGING = 1;

    /**
     * <p>
     * if android.flash.available is true Flash is
     * ready to fire
     * </p>
     * @see CaptureResult#FLASH_STATE
     */
    public static final int FLASH_STATE_READY = 2;

    /**
     * <p>
     * if android.flash.available is true Flash fired
     * for this capture
     * </p>
     * @see CaptureResult#FLASH_STATE
     */
    public static final int FLASH_STATE_FIRED = 3;

    //
    // Enumeration values for CaptureResult#LENS_STATE
    //

    /**
     * @see CaptureResult#LENS_STATE
     */
    public static final int LENS_STATE_STATIONARY = 0;

    /**
     * @see CaptureResult#LENS_STATE
     */
    public static final int LENS_STATE_MOVING = 1;

    //
    // Enumeration values for CaptureResult#STATISTICS_SCENE_FLICKER
    //

    /**
     * @see CaptureResult#STATISTICS_SCENE_FLICKER
     */
    public static final int STATISTICS_SCENE_FLICKER_NONE = 0;

    /**
     * @see CaptureResult#STATISTICS_SCENE_FLICKER
     */
    public static final int STATISTICS_SCENE_FLICKER_50HZ = 1;

    /**
     * @see CaptureResult#STATISTICS_SCENE_FLICKER
     */
    public static final int STATISTICS_SCENE_FLICKER_60HZ = 2;

    /*~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
     * End generated code
     *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~O@*/

}