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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.hardware.camera2;
     18 
     19 import android.annotation.NonNull;
     20 import android.hardware.camera2.impl.CameraMetadataNative;
     21 import android.hardware.camera2.impl.PublicKey;
     22 import android.hardware.camera2.impl.SyntheticKey;
     23 import android.util.Log;
     24 
     25 import java.lang.reflect.Field;
     26 import java.lang.reflect.Modifier;
     27 import java.util.ArrayList;
     28 import java.util.Arrays;
     29 import java.util.Collections;
     30 import java.util.List;
     31 
     32 /**
     33  * The base class for camera controls and information.
     34  *
     35  * <p>
     36  * This class defines the basic key/value map used for querying for camera
     37  * characteristics or capture results, and for setting camera request
     38  * parameters.
     39  * </p>
     40  *
     41  * <p>
     42  * All instances of CameraMetadata are immutable. The list of keys with {@link #getKeys()}
     43  * never changes, nor do the values returned by any key with {@code #get} throughout
     44  * the lifetime of the object.
     45  * </p>
     46  *
     47  * @see CameraDevice
     48  * @see CameraManager
     49  * @see CameraCharacteristics
     50  **/
     51 public abstract class CameraMetadata<TKey> {
     52 
     53     private static final String TAG = "CameraMetadataAb";
     54     private static final boolean DEBUG = false;
     55 
     56     /**
     57      * Set a camera metadata field to a value. The field definitions can be
     58      * found in {@link CameraCharacteristics}, {@link CaptureResult}, and
     59      * {@link CaptureRequest}.
     60      *
     61      * @param key The metadata field to write.
     62      * @param value The value to set the field to, which must be of a matching
     63      * type to the key.
     64      *
     65      * @hide
     66      */
     67     protected CameraMetadata() {
     68     }
     69 
     70     /**
     71      * Get a camera metadata field value.
     72      *
     73      * <p>The field definitions can be
     74      * found in {@link CameraCharacteristics}, {@link CaptureResult}, and
     75      * {@link CaptureRequest}.</p>
     76      *
     77      * <p>Querying the value for the same key more than once will return a value
     78      * which is equal to the previous queried value.</p>
     79      *
     80      * @throws IllegalArgumentException if the key was not valid
     81      *
     82      * @param key The metadata field to read.
     83      * @return The value of that key, or {@code null} if the field is not set.
     84      *
     85      * @hide
     86      */
     87      protected abstract <T> T getProtected(TKey key);
     88 
     89      /**
     90       * @hide
     91       */
     92      protected abstract Class<TKey> getKeyClass();
     93 
     94     /**
     95      * Returns a list of the keys contained in this map.
     96      *
     97      * <p>The list returned is not modifiable, so any attempts to modify it will throw
     98      * a {@code UnsupportedOperationException}.</p>
     99      *
    100      * <p>All values retrieved by a key from this list with {@code #get} are guaranteed to be
    101      * non-{@code null}. Each key is only listed once in the list. The order of the keys
    102      * is undefined.</p>
    103      *
    104      * @return List of the keys contained in this map.
    105      */
    106     @SuppressWarnings("unchecked")
    107     @NonNull
    108     public List<TKey> getKeys() {
    109         Class<CameraMetadata<TKey>> thisClass = (Class<CameraMetadata<TKey>>) getClass();
    110         return Collections.unmodifiableList(
    111                 getKeysStatic(thisClass, getKeyClass(), this, /*filterTags*/null));
    112     }
    113 
    114     /**
    115      * Return a list of all the Key<?> that are declared as a field inside of the class
    116      * {@code type}.
    117      *
    118      * <p>
    119      * Optionally, if {@code instance} is not null, then filter out any keys with null values.
    120      * </p>
    121      *
    122      * <p>
    123      * Optionally, if {@code filterTags} is not {@code null}, then filter out any keys
    124      * whose native {@code tag} is not in {@code filterTags}. The {@code filterTags} array will be
    125      * sorted as a side effect.
    126      * </p>
    127      */
    128      /*package*/ @SuppressWarnings("unchecked")
    129     static <TKey> ArrayList<TKey> getKeysStatic(
    130              Class<?> type, Class<TKey> keyClass,
    131              CameraMetadata<TKey> instance,
    132              int[] filterTags) {
    133 
    134         if (DEBUG) Log.v(TAG, "getKeysStatic for " + type);
    135 
    136         // TotalCaptureResult does not have any of the keys on it, use CaptureResult instead
    137         if (type.equals(TotalCaptureResult.class)) {
    138             type = CaptureResult.class;
    139         }
    140 
    141         if (filterTags != null) {
    142             Arrays.sort(filterTags);
    143         }
    144 
    145         ArrayList<TKey> keyList = new ArrayList<TKey>();
    146 
    147         Field[] fields = type.getDeclaredFields();
    148         for (Field field : fields) {
    149             // Filter for Keys that are public
    150             if (field.getType().isAssignableFrom(keyClass) &&
    151                     (field.getModifiers() & Modifier.PUBLIC) != 0) {
    152 
    153                 TKey key;
    154                 try {
    155                     key = (TKey) field.get(instance);
    156                 } catch (IllegalAccessException e) {
    157                     throw new AssertionError("Can't get IllegalAccessException", e);
    158                 } catch (IllegalArgumentException e) {
    159                     throw new AssertionError("Can't get IllegalArgumentException", e);
    160                 }
    161 
    162                 if (instance == null || instance.getProtected(key) != null) {
    163                     if (shouldKeyBeAdded(key, field, filterTags)) {
    164                         keyList.add(key);
    165 
    166                         if (DEBUG) {
    167                             Log.v(TAG, "getKeysStatic - key was added - " + key);
    168                         }
    169                     } else if (DEBUG) {
    170                         Log.v(TAG, "getKeysStatic - key was filtered - " + key);
    171                     }
    172                 }
    173             }
    174         }
    175 
    176         ArrayList<TKey> vendorKeys = CameraMetadataNative.getAllVendorKeys(keyClass);
    177 
    178         if (vendorKeys != null) {
    179             for (TKey k : vendorKeys) {
    180                 String keyName;
    181                 if (k instanceof CaptureRequest.Key<?>) {
    182                     keyName = ((CaptureRequest.Key<?>) k).getName();
    183                 } else if (k instanceof CaptureResult.Key<?>) {
    184                     keyName = ((CaptureResult.Key<?>) k).getName();
    185                 } else if (k instanceof CameraCharacteristics.Key<?>) {
    186                     keyName = ((CameraCharacteristics.Key<?>) k).getName();
    187                 } else {
    188                     continue;
    189                 }
    190 
    191                 if (filterTags == null || Arrays.binarySearch(filterTags,
    192                         CameraMetadataNative.getTag(keyName)) >= 0) {
    193                     keyList.add(k);
    194                 }
    195             }
    196         }
    197 
    198         return keyList;
    199     }
    200 
    201     @SuppressWarnings("rawtypes")
    202     private static <TKey> boolean shouldKeyBeAdded(TKey key, Field field, int[] filterTags) {
    203         if (key == null) {
    204             throw new NullPointerException("key must not be null");
    205         }
    206 
    207         CameraMetadataNative.Key nativeKey;
    208 
    209         /*
    210          * Get the native key from the public api key
    211          */
    212         if (key instanceof CameraCharacteristics.Key) {
    213             nativeKey = ((CameraCharacteristics.Key)key).getNativeKey();
    214         } else if (key instanceof CaptureResult.Key) {
    215             nativeKey = ((CaptureResult.Key)key).getNativeKey();
    216         } else if (key instanceof CaptureRequest.Key) {
    217             nativeKey = ((CaptureRequest.Key)key).getNativeKey();
    218         } else {
    219             // Reject fields that aren't a key
    220             throw new IllegalArgumentException("key type must be that of a metadata key");
    221         }
    222 
    223         if (field.getAnnotation(PublicKey.class) == null) {
    224             // Never expose @hide keys up to the API user
    225             return false;
    226         }
    227 
    228         // No filtering necessary
    229         if (filterTags == null) {
    230             return true;
    231         }
    232 
    233         if (field.getAnnotation(SyntheticKey.class) != null) {
    234             // This key is synthetic, so calling #getTag will throw IAE
    235 
    236             // TODO: don't just assume all public+synthetic keys are always available
    237             return true;
    238         }
    239 
    240         /*
    241          * Regular key: look up it's native tag and see if it's in filterTags
    242          */
    243 
    244         int keyTag = nativeKey.getTag();
    245 
    246         // non-negative result is returned iff the value is in the array
    247         return Arrays.binarySearch(filterTags, keyTag) >= 0;
    248     }
    249 
    250     /*@O~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
    251      * The enum values below this point are generated from metadata
    252      * definitions in /system/media/camera/docs. Do not modify by hand or
    253      * modify the comment blocks at the start or end.
    254      *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~*/
    255 
    256     //
    257     // Enumeration values for CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
    258     //
    259 
    260     /**
    261      * <p>The lens focus distance is not accurate, and the units used for
    262      * {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance} do not correspond to any physical units.</p>
    263      * <p>Setting the lens to the same focus distance on separate occasions may
    264      * result in a different real focus distance, depending on factors such
    265      * as the orientation of the device, the age of the focusing mechanism,
    266      * and the device temperature. The focus distance value will still be
    267      * in the range of <code>[0, {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance}]</code>, where 0
    268      * represents the farthest focus.</p>
    269      *
    270      * @see CaptureRequest#LENS_FOCUS_DISTANCE
    271      * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE
    272      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
    273      */
    274     public static final int LENS_INFO_FOCUS_DISTANCE_CALIBRATION_UNCALIBRATED = 0;
    275 
    276     /**
    277      * <p>The lens focus distance is measured in diopters.</p>
    278      * <p>However, setting the lens to the same focus distance
    279      * on separate occasions may result in a different real
    280      * focus distance, depending on factors such as the
    281      * orientation of the device, the age of the focusing
    282      * mechanism, and the device temperature.</p>
    283      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
    284      */
    285     public static final int LENS_INFO_FOCUS_DISTANCE_CALIBRATION_APPROXIMATE = 1;
    286 
    287     /**
    288      * <p>The lens focus distance is measured in diopters, and
    289      * is calibrated.</p>
    290      * <p>The lens mechanism is calibrated so that setting the
    291      * same focus distance is repeatable on multiple
    292      * occasions with good accuracy, and the focus distance
    293      * corresponds to the real physical distance to the plane
    294      * of best focus.</p>
    295      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
    296      */
    297     public static final int LENS_INFO_FOCUS_DISTANCE_CALIBRATION_CALIBRATED = 2;
    298 
    299     //
    300     // Enumeration values for CameraCharacteristics#LENS_FACING
    301     //
    302 
    303     /**
    304      * <p>The camera device faces the same direction as the device's screen.</p>
    305      * @see CameraCharacteristics#LENS_FACING
    306      */
    307     public static final int LENS_FACING_FRONT = 0;
    308 
    309     /**
    310      * <p>The camera device faces the opposite direction as the device's screen.</p>
    311      * @see CameraCharacteristics#LENS_FACING
    312      */
    313     public static final int LENS_FACING_BACK = 1;
    314 
    315     /**
    316      * <p>The camera device is an external camera, and has no fixed facing relative to the
    317      * device's screen.</p>
    318      * @see CameraCharacteristics#LENS_FACING
    319      */
    320     public static final int LENS_FACING_EXTERNAL = 2;
    321 
    322     //
    323     // Enumeration values for CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    324     //
    325 
    326     /**
    327      * <p>The minimal set of capabilities that every camera
    328      * device (regardless of {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel})
    329      * supports.</p>
    330      * <p>This capability is listed by all normal devices, and
    331      * indicates that the camera device has a feature set
    332      * that's comparable to the baseline requirements for the
    333      * older android.hardware.Camera API.</p>
    334      * <p>Devices with the DEPTH_OUTPUT capability might not list this
    335      * capability, indicating that they support only depth measurement,
    336      * not standard color output.</p>
    337      *
    338      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
    339      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    340      */
    341     public static final int REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE = 0;
    342 
    343     /**
    344      * <p>The camera device can be manually controlled (3A algorithms such
    345      * as auto-exposure, and auto-focus can be bypassed).
    346      * The camera device supports basic manual control of the sensor image
    347      * acquisition related stages. This means the following controls are
    348      * guaranteed to be supported:</p>
    349      * <ul>
    350      * <li>Manual frame duration control<ul>
    351      * <li>{@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}</li>
    352      * <li>{@link CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION android.sensor.info.maxFrameDuration}</li>
    353      * </ul>
    354      * </li>
    355      * <li>Manual exposure control<ul>
    356      * <li>{@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}</li>
    357      * <li>{@link CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE android.sensor.info.exposureTimeRange}</li>
    358      * </ul>
    359      * </li>
    360      * <li>Manual sensitivity control<ul>
    361      * <li>{@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}</li>
    362      * <li>{@link CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE android.sensor.info.sensitivityRange}</li>
    363      * </ul>
    364      * </li>
    365      * <li>Manual lens control (if the lens is adjustable)<ul>
    366      * <li>android.lens.*</li>
    367      * </ul>
    368      * </li>
    369      * <li>Manual flash control (if a flash unit is present)<ul>
    370      * <li>android.flash.*</li>
    371      * </ul>
    372      * </li>
    373      * <li>Manual black level locking<ul>
    374      * <li>{@link CaptureRequest#BLACK_LEVEL_LOCK android.blackLevel.lock}</li>
    375      * </ul>
    376      * </li>
    377      * <li>Auto exposure lock<ul>
    378      * <li>{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock}</li>
    379      * </ul>
    380      * </li>
    381      * </ul>
    382      * <p>If any of the above 3A algorithms are enabled, then the camera
    383      * device will accurately report the values applied by 3A in the
    384      * result.</p>
    385      * <p>A given camera device may also support additional manual sensor controls,
    386      * but this capability only covers the above list of controls.</p>
    387      * <p>If this is supported, {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap} will
    388      * additionally return a min frame duration that is greater than
    389      * zero for each supported size-format combination.</p>
    390      *
    391      * @see CaptureRequest#BLACK_LEVEL_LOCK
    392      * @see CaptureRequest#CONTROL_AE_LOCK
    393      * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP
    394      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
    395      * @see CaptureRequest#SENSOR_FRAME_DURATION
    396      * @see CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE
    397      * @see CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION
    398      * @see CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE
    399      * @see CaptureRequest#SENSOR_SENSITIVITY
    400      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    401      */
    402     public static final int REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR = 1;
    403 
    404     /**
    405      * <p>The camera device post-processing stages can be manually controlled.
    406      * The camera device supports basic manual control of the image post-processing
    407      * stages. This means the following controls are guaranteed to be supported:</p>
    408      * <ul>
    409      * <li>
    410      * <p>Manual tonemap control</p>
    411      * <ul>
    412      * <li>{@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}</li>
    413      * <li>{@link CaptureRequest#TONEMAP_MODE android.tonemap.mode}</li>
    414      * <li>{@link CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS android.tonemap.maxCurvePoints}</li>
    415      * <li>{@link CaptureRequest#TONEMAP_GAMMA android.tonemap.gamma}</li>
    416      * <li>{@link CaptureRequest#TONEMAP_PRESET_CURVE android.tonemap.presetCurve}</li>
    417      * </ul>
    418      * </li>
    419      * <li>
    420      * <p>Manual white balance control</p>
    421      * <ul>
    422      * <li>{@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}</li>
    423      * <li>{@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains}</li>
    424      * </ul>
    425      * </li>
    426      * <li>Manual lens shading map control<ul>
    427      * <li>{@link CaptureRequest#SHADING_MODE android.shading.mode}</li>
    428      * <li>{@link CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE android.statistics.lensShadingMapMode}</li>
    429      * <li>android.statistics.lensShadingMap</li>
    430      * <li>android.lens.info.shadingMapSize</li>
    431      * </ul>
    432      * </li>
    433      * <li>Manual aberration correction control (if aberration correction is supported)<ul>
    434      * <li>{@link CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE android.colorCorrection.aberrationMode}</li>
    435      * <li>{@link CameraCharacteristics#COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES android.colorCorrection.availableAberrationModes}</li>
    436      * </ul>
    437      * </li>
    438      * <li>Auto white balance lock<ul>
    439      * <li>{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock}</li>
    440      * </ul>
    441      * </li>
    442      * </ul>
    443      * <p>If auto white balance is enabled, then the camera device
    444      * will accurately report the values applied by AWB in the result.</p>
    445      * <p>A given camera device may also support additional post-processing
    446      * controls, but this capability only covers the above list of controls.</p>
    447      *
    448      * @see CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
    449      * @see CameraCharacteristics#COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES
    450      * @see CaptureRequest#COLOR_CORRECTION_GAINS
    451      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
    452      * @see CaptureRequest#CONTROL_AWB_LOCK
    453      * @see CaptureRequest#SHADING_MODE
    454      * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
    455      * @see CaptureRequest#TONEMAP_CURVE
    456      * @see CaptureRequest#TONEMAP_GAMMA
    457      * @see CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS
    458      * @see CaptureRequest#TONEMAP_MODE
    459      * @see CaptureRequest#TONEMAP_PRESET_CURVE
    460      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    461      */
    462     public static final int REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING = 2;
    463 
    464     /**
    465      * <p>The camera device supports outputting RAW buffers and
    466      * metadata for interpreting them.</p>
    467      * <p>Devices supporting the RAW capability allow both for
    468      * saving DNG files, and for direct application processing of
    469      * raw sensor images.</p>
    470      * <ul>
    471      * <li>RAW_SENSOR is supported as an output format.</li>
    472      * <li>The maximum available resolution for RAW_SENSOR streams
    473      *   will match either the value in
    474      *   {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize} or
    475      *   {@link CameraCharacteristics#SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE android.sensor.info.preCorrectionActiveArraySize}.</li>
    476      * <li>All DNG-related optional metadata entries are provided
    477      *   by the camera device.</li>
    478      * </ul>
    479      *
    480      * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE
    481      * @see CameraCharacteristics#SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE
    482      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    483      */
    484     public static final int REQUEST_AVAILABLE_CAPABILITIES_RAW = 3;
    485 
    486     /**
    487      * <p>The camera device supports the Zero Shutter Lag reprocessing use case.</p>
    488      * <ul>
    489      * <li>One input stream is supported, that is, <code>{@link CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS android.request.maxNumInputStreams} == 1</code>.</li>
    490      * <li>{@link android.graphics.ImageFormat#PRIVATE } is supported as an output/input format,
    491      *   that is, {@link android.graphics.ImageFormat#PRIVATE } is included in the lists of
    492      *   formats returned by {@link android.hardware.camera2.params.StreamConfigurationMap#getInputFormats } and {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputFormats }.</li>
    493      * <li>{@link android.hardware.camera2.params.StreamConfigurationMap#getValidOutputFormatsForInput }
    494      *   returns non empty int[] for each supported input format returned by {@link android.hardware.camera2.params.StreamConfigurationMap#getInputFormats }.</li>
    495      * <li>Each size returned by {@link android.hardware.camera2.params.StreamConfigurationMap#getInputSizes getInputSizes(ImageFormat.PRIVATE)} is also included in {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputSizes getOutputSizes(ImageFormat.PRIVATE)}</li>
    496      * <li>Using {@link android.graphics.ImageFormat#PRIVATE } does not cause a frame rate drop
    497      *   relative to the sensor's maximum capture rate (at that resolution).</li>
    498      * <li>{@link android.graphics.ImageFormat#PRIVATE } will be reprocessable into both
    499      *   {@link android.graphics.ImageFormat#YUV_420_888 } and
    500      *   {@link android.graphics.ImageFormat#JPEG } formats.</li>
    501      * <li>The maximum available resolution for PRIVATE streams
    502      *   (both input/output) will match the maximum available
    503      *   resolution of JPEG streams.</li>
    504      * <li>Static metadata {@link CameraCharacteristics#REPROCESS_MAX_CAPTURE_STALL android.reprocess.maxCaptureStall}.</li>
    505      * <li>Only below controls are effective for reprocessing requests and
    506      *   will be present in capture results, other controls in reprocess
    507      *   requests will be ignored by the camera device.<ul>
    508      * <li>android.jpeg.*</li>
    509      * <li>{@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode}</li>
    510      * <li>{@link CaptureRequest#EDGE_MODE android.edge.mode}</li>
    511      * </ul>
    512      * </li>
    513      * <li>{@link CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES android.noiseReduction.availableNoiseReductionModes} and
    514      *   {@link CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES android.edge.availableEdgeModes} will both list ZERO_SHUTTER_LAG as a supported mode.</li>
    515      * </ul>
    516      *
    517      * @see CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES
    518      * @see CaptureRequest#EDGE_MODE
    519      * @see CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES
    520      * @see CaptureRequest#NOISE_REDUCTION_MODE
    521      * @see CameraCharacteristics#REPROCESS_MAX_CAPTURE_STALL
    522      * @see CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS
    523      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    524      */
    525     public static final int REQUEST_AVAILABLE_CAPABILITIES_PRIVATE_REPROCESSING = 4;
    526 
    527     /**
    528      * <p>The camera device supports accurately reporting the sensor settings for many of
    529      * the sensor controls while the built-in 3A algorithm is running.  This allows
    530      * reporting of sensor settings even when these settings cannot be manually changed.</p>
    531      * <p>The values reported for the following controls are guaranteed to be available
    532      * in the CaptureResult, including when 3A is enabled:</p>
    533      * <ul>
    534      * <li>Exposure control<ul>
    535      * <li>{@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}</li>
    536      * </ul>
    537      * </li>
    538      * <li>Sensitivity control<ul>
    539      * <li>{@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}</li>
    540      * </ul>
    541      * </li>
    542      * <li>Lens controls (if the lens is adjustable)<ul>
    543      * <li>{@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance}</li>
    544      * <li>{@link CaptureRequest#LENS_APERTURE android.lens.aperture}</li>
    545      * </ul>
    546      * </li>
    547      * </ul>
    548      * <p>This capability is a subset of the MANUAL_SENSOR control capability, and will
    549      * always be included if the MANUAL_SENSOR capability is available.</p>
    550      *
    551      * @see CaptureRequest#LENS_APERTURE
    552      * @see CaptureRequest#LENS_FOCUS_DISTANCE
    553      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
    554      * @see CaptureRequest#SENSOR_SENSITIVITY
    555      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    556      */
    557     public static final int REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS = 5;
    558 
    559     /**
    560      * <p>The camera device supports capturing high-resolution images at &gt;= 20 frames per
    561      * second, in at least the uncompressed YUV format, when post-processing settings are set
    562      * to FAST. Additionally, maximum-resolution images can be captured at &gt;= 10 frames
    563      * per second.  Here, 'high resolution' means at least 8 megapixels, or the maximum
    564      * resolution of the device, whichever is smaller.</p>
    565      * <p>More specifically, this means that a size matching the camera device's active array
    566      * size is listed as a supported size for the {@link android.graphics.ImageFormat#YUV_420_888 } format in either {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputSizes } or {@link android.hardware.camera2.params.StreamConfigurationMap#getHighResolutionOutputSizes },
    567      * with a minimum frame duration for that format and size of either &lt;= 1/20 s, or
    568      * &lt;= 1/10 s, respectively; and the {@link CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES android.control.aeAvailableTargetFpsRanges} entry
    569      * lists at least one FPS range where the minimum FPS is &gt;= 1 / minimumFrameDuration
    570      * for the maximum-size YUV_420_888 format.  If that maximum size is listed in {@link android.hardware.camera2.params.StreamConfigurationMap#getHighResolutionOutputSizes },
    571      * then the list of resolutions for YUV_420_888 from {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputSizes } contains at
    572      * least one resolution &gt;= 8 megapixels, with a minimum frame duration of &lt;= 1/20
    573      * s.</p>
    574      * <p>If the device supports the {@link android.graphics.ImageFormat#RAW10 }, {@link android.graphics.ImageFormat#RAW12 }, then those can also be captured at the same rate
    575      * as the maximum-size YUV_420_888 resolution is.</p>
    576      * <p>If the device supports the PRIVATE_REPROCESSING capability, then the same guarantees
    577      * as for the YUV_420_888 format also apply to the {@link android.graphics.ImageFormat#PRIVATE } format.</p>
    578      * <p>In addition, the {@link CameraCharacteristics#SYNC_MAX_LATENCY android.sync.maxLatency} field is guaranted to have a value between 0
    579      * and 4, inclusive. {@link CameraCharacteristics#CONTROL_AE_LOCK_AVAILABLE android.control.aeLockAvailable} and {@link CameraCharacteristics#CONTROL_AWB_LOCK_AVAILABLE android.control.awbLockAvailable}
    580      * are also guaranteed to be <code>true</code> so burst capture with these two locks ON yields
    581      * consistent image output.</p>
    582      *
    583      * @see CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES
    584      * @see CameraCharacteristics#CONTROL_AE_LOCK_AVAILABLE
    585      * @see CameraCharacteristics#CONTROL_AWB_LOCK_AVAILABLE
    586      * @see CameraCharacteristics#SYNC_MAX_LATENCY
    587      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    588      */
    589     public static final int REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE = 6;
    590 
    591     /**
    592      * <p>The camera device supports the YUV_420_888 reprocessing use case, similar as
    593      * PRIVATE_REPROCESSING, This capability requires the camera device to support the
    594      * following:</p>
    595      * <ul>
    596      * <li>One input stream is supported, that is, <code>{@link CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS android.request.maxNumInputStreams} == 1</code>.</li>
    597      * <li>{@link android.graphics.ImageFormat#YUV_420_888 } is supported as an output/input format, that is,
    598      *   YUV_420_888 is included in the lists of formats returned by
    599      *   {@link android.hardware.camera2.params.StreamConfigurationMap#getInputFormats } and
    600      *   {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputFormats }.</li>
    601      * <li>{@link android.hardware.camera2.params.StreamConfigurationMap#getValidOutputFormatsForInput }
    602      *   returns non-empty int[] for each supported input format returned by {@link android.hardware.camera2.params.StreamConfigurationMap#getInputFormats }.</li>
    603      * <li>Each size returned by {@link android.hardware.camera2.params.StreamConfigurationMap#getInputSizes getInputSizes(YUV_420_888)} is also included in {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputSizes getOutputSizes(YUV_420_888)}</li>
    604      * <li>Using {@link android.graphics.ImageFormat#YUV_420_888 } does not cause a frame rate drop
    605      *   relative to the sensor's maximum capture rate (at that resolution).</li>
    606      * <li>{@link android.graphics.ImageFormat#YUV_420_888 } will be reprocessable into both
    607      *   {@link android.graphics.ImageFormat#YUV_420_888 } and {@link android.graphics.ImageFormat#JPEG } formats.</li>
    608      * <li>The maximum available resolution for {@link android.graphics.ImageFormat#YUV_420_888 } streams (both input/output) will match the
    609      *   maximum available resolution of {@link android.graphics.ImageFormat#JPEG } streams.</li>
    610      * <li>Static metadata {@link CameraCharacteristics#REPROCESS_MAX_CAPTURE_STALL android.reprocess.maxCaptureStall}.</li>
    611      * <li>Only the below controls are effective for reprocessing requests and will be present
    612      *   in capture results. The reprocess requests are from the original capture results that
    613      *   are associated with the intermediate {@link android.graphics.ImageFormat#YUV_420_888 }
    614      *   output buffers.  All other controls in the reprocess requests will be ignored by the
    615      *   camera device.<ul>
    616      * <li>android.jpeg.*</li>
    617      * <li>{@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode}</li>
    618      * <li>{@link CaptureRequest#EDGE_MODE android.edge.mode}</li>
    619      * <li>{@link CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR android.reprocess.effectiveExposureFactor}</li>
    620      * </ul>
    621      * </li>
    622      * <li>{@link CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES android.noiseReduction.availableNoiseReductionModes} and
    623      *   {@link CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES android.edge.availableEdgeModes} will both list ZERO_SHUTTER_LAG as a supported mode.</li>
    624      * </ul>
    625      *
    626      * @see CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES
    627      * @see CaptureRequest#EDGE_MODE
    628      * @see CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES
    629      * @see CaptureRequest#NOISE_REDUCTION_MODE
    630      * @see CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR
    631      * @see CameraCharacteristics#REPROCESS_MAX_CAPTURE_STALL
    632      * @see CameraCharacteristics#REQUEST_MAX_NUM_INPUT_STREAMS
    633      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    634      */
    635     public static final int REQUEST_AVAILABLE_CAPABILITIES_YUV_REPROCESSING = 7;
    636 
    637     /**
    638      * <p>The camera device can produce depth measurements from its field of view.</p>
    639      * <p>This capability requires the camera device to support the following:</p>
    640      * <ul>
    641      * <li>{@link android.graphics.ImageFormat#DEPTH16 } is supported as an output format.</li>
    642      * <li>{@link android.graphics.ImageFormat#DEPTH_POINT_CLOUD } is optionally supported as an
    643      *   output format.</li>
    644      * <li>This camera device, and all camera devices with the same {@link CameraCharacteristics#LENS_FACING android.lens.facing},
    645      *   will list the following calibration entries in both
    646      *   {@link android.hardware.camera2.CameraCharacteristics } and
    647      *   {@link android.hardware.camera2.CaptureResult }:<ul>
    648      * <li>{@link CameraCharacteristics#LENS_POSE_TRANSLATION android.lens.poseTranslation}</li>
    649      * <li>{@link CameraCharacteristics#LENS_POSE_ROTATION android.lens.poseRotation}</li>
    650      * <li>{@link CameraCharacteristics#LENS_INTRINSIC_CALIBRATION android.lens.intrinsicCalibration}</li>
    651      * <li>{@link CameraCharacteristics#LENS_RADIAL_DISTORTION android.lens.radialDistortion}</li>
    652      * </ul>
    653      * </li>
    654      * <li>The {@link CameraCharacteristics#DEPTH_DEPTH_IS_EXCLUSIVE android.depth.depthIsExclusive} entry is listed by this device.</li>
    655      * <li>A LIMITED camera with only the DEPTH_OUTPUT capability does not have to support
    656      *   normal YUV_420_888, JPEG, and PRIV-format outputs. It only has to support the DEPTH16
    657      *   format.</li>
    658      * </ul>
    659      * <p>Generally, depth output operates at a slower frame rate than standard color capture,
    660      * so the DEPTH16 and DEPTH_POINT_CLOUD formats will commonly have a stall duration that
    661      * should be accounted for (see
    662      * {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputStallDuration }).
    663      * On a device that supports both depth and color-based output, to enable smooth preview,
    664      * using a repeating burst is recommended, where a depth-output target is only included
    665      * once every N frames, where N is the ratio between preview output rate and depth output
    666      * rate, including depth stall time.</p>
    667      *
    668      * @see CameraCharacteristics#DEPTH_DEPTH_IS_EXCLUSIVE
    669      * @see CameraCharacteristics#LENS_FACING
    670      * @see CameraCharacteristics#LENS_INTRINSIC_CALIBRATION
    671      * @see CameraCharacteristics#LENS_POSE_ROTATION
    672      * @see CameraCharacteristics#LENS_POSE_TRANSLATION
    673      * @see CameraCharacteristics#LENS_RADIAL_DISTORTION
    674      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    675      */
    676     public static final int REQUEST_AVAILABLE_CAPABILITIES_DEPTH_OUTPUT = 8;
    677 
    678     /**
    679      * <p>The device supports constrained high speed video recording (frame rate &gt;=120fps)
    680      * use case. The camera device will support high speed capture session created by
    681      * {@link android.hardware.camera2.CameraDevice#createConstrainedHighSpeedCaptureSession }, which
    682      * only accepts high speed request lists created by
    683      * {@link android.hardware.camera2.CameraConstrainedHighSpeedCaptureSession#createHighSpeedRequestList }.</p>
    684      * <p>A camera device can still support high speed video streaming by advertising the high speed
    685      * FPS ranges in {@link CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES android.control.aeAvailableTargetFpsRanges}. For this case, all normal
    686      * capture request per frame control and synchronization requirements will apply to
    687      * the high speed fps ranges, the same as all other fps ranges. This capability describes
    688      * the capability of a specialized operating mode with many limitations (see below), which
    689      * is only targeted at high speed video recording.</p>
    690      * <p>The supported high speed video sizes and fps ranges are specified in
    691      * {@link android.hardware.camera2.params.StreamConfigurationMap#getHighSpeedVideoFpsRanges }.
    692      * To get desired output frame rates, the application is only allowed to select video size
    693      * and FPS range combinations provided by
    694      * {@link android.hardware.camera2.params.StreamConfigurationMap#getHighSpeedVideoSizes }.
    695      * The fps range can be controlled via {@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange}.</p>
    696      * <p>In this capability, the camera device will override aeMode, awbMode, and afMode to
    697      * ON, AUTO, and CONTINUOUS_VIDEO, respectively. All post-processing block mode
    698      * controls will be overridden to be FAST. Therefore, no manual control of capture
    699      * and post-processing parameters is possible. All other controls operate the
    700      * same as when {@link CaptureRequest#CONTROL_MODE android.control.mode} == AUTO. This means that all other
    701      * android.control.* fields continue to work, such as</p>
    702      * <ul>
    703      * <li>{@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange}</li>
    704      * <li>{@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation}</li>
    705      * <li>{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock}</li>
    706      * <li>{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock}</li>
    707      * <li>{@link CaptureRequest#CONTROL_EFFECT_MODE android.control.effectMode}</li>
    708      * <li>{@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}</li>
    709      * <li>{@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions}</li>
    710      * <li>{@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions}</li>
    711      * <li>{@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}</li>
    712      * <li>{@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}</li>
    713      * </ul>
    714      * <p>Outside of android.control.*, the following controls will work:</p>
    715      * <ul>
    716      * <li>{@link CaptureRequest#FLASH_MODE android.flash.mode} (TORCH mode only, automatic flash for still capture will not
    717      * work since aeMode is ON)</li>
    718      * <li>{@link CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE android.lens.opticalStabilizationMode} (if it is supported)</li>
    719      * <li>{@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}</li>
    720      * <li>{@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} (if it is supported)</li>
    721      * </ul>
    722      * <p>For high speed recording use case, the actual maximum supported frame rate may
    723      * be lower than what camera can output, depending on the destination Surfaces for
    724      * the image data. For example, if the destination surface is from video encoder,
    725      * the application need check if the video encoder is capable of supporting the
    726      * high frame rate for a given video size, or it will end up with lower recording
    727      * frame rate. If the destination surface is from preview window, the actual preview frame
    728      * rate will be bounded by the screen refresh rate.</p>
    729      * <p>The camera device will only support up to 2 high speed simultaneous output surfaces
    730      * (preview and recording surfaces)
    731      * in this mode. Above controls will be effective only if all of below conditions are true:</p>
    732      * <ul>
    733      * <li>The application creates a camera capture session with no more than 2 surfaces via
    734      * {@link android.hardware.camera2.CameraDevice#createConstrainedHighSpeedCaptureSession }. The
    735      * targeted surfaces must be preview surface (either from
    736      * {@link android.view.SurfaceView } or {@link android.graphics.SurfaceTexture }) or
    737      * recording surface(either from {@link android.media.MediaRecorder#getSurface } or
    738      * {@link android.media.MediaCodec#createInputSurface }).</li>
    739      * <li>The stream sizes are selected from the sizes reported by
    740      * {@link android.hardware.camera2.params.StreamConfigurationMap#getHighSpeedVideoSizes }.</li>
    741      * <li>The FPS ranges are selected from
    742      * {@link android.hardware.camera2.params.StreamConfigurationMap#getHighSpeedVideoFpsRanges }.</li>
    743      * </ul>
    744      * <p>When above conditions are NOT satistied,
    745      * {@link android.hardware.camera2.CameraDevice#createConstrainedHighSpeedCaptureSession }
    746      * will fail.</p>
    747      * <p>Switching to a FPS range that has different maximum FPS may trigger some camera device
    748      * reconfigurations, which may introduce extra latency. It is recommended that
    749      * the application avoids unnecessary maximum target FPS changes as much as possible
    750      * during high speed streaming.</p>
    751      *
    752      * @see CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES
    753      * @see CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION
    754      * @see CaptureRequest#CONTROL_AE_LOCK
    755      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
    756      * @see CaptureRequest#CONTROL_AE_REGIONS
    757      * @see CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE
    758      * @see CaptureRequest#CONTROL_AF_REGIONS
    759      * @see CaptureRequest#CONTROL_AF_TRIGGER
    760      * @see CaptureRequest#CONTROL_AWB_LOCK
    761      * @see CaptureRequest#CONTROL_AWB_REGIONS
    762      * @see CaptureRequest#CONTROL_EFFECT_MODE
    763      * @see CaptureRequest#CONTROL_MODE
    764      * @see CaptureRequest#FLASH_MODE
    765      * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
    766      * @see CaptureRequest#SCALER_CROP_REGION
    767      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
    768      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    769      */
    770     public static final int REQUEST_AVAILABLE_CAPABILITIES_CONSTRAINED_HIGH_SPEED_VIDEO = 9;
    771 
    772     //
    773     // Enumeration values for CameraCharacteristics#SCALER_CROPPING_TYPE
    774     //
    775 
    776     /**
    777      * <p>The camera device only supports centered crop regions.</p>
    778      * @see CameraCharacteristics#SCALER_CROPPING_TYPE
    779      */
    780     public static final int SCALER_CROPPING_TYPE_CENTER_ONLY = 0;
    781 
    782     /**
    783      * <p>The camera device supports arbitrarily chosen crop regions.</p>
    784      * @see CameraCharacteristics#SCALER_CROPPING_TYPE
    785      */
    786     public static final int SCALER_CROPPING_TYPE_FREEFORM = 1;
    787 
    788     //
    789     // Enumeration values for CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    790     //
    791 
    792     /**
    793      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    794      */
    795     public static final int SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGGB = 0;
    796 
    797     /**
    798      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    799      */
    800     public static final int SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GRBG = 1;
    801 
    802     /**
    803      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    804      */
    805     public static final int SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GBRG = 2;
    806 
    807     /**
    808      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    809      */
    810     public static final int SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_BGGR = 3;
    811 
    812     /**
    813      * <p>Sensor is not Bayer; output has 3 16-bit
    814      * values for each pixel, instead of just 1 16-bit value
    815      * per pixel.</p>
    816      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
    817      */
    818     public static final int SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGB = 4;
    819 
    820     //
    821     // Enumeration values for CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE
    822     //
    823 
    824     /**
    825      * <p>Timestamps from {@link CaptureResult#SENSOR_TIMESTAMP android.sensor.timestamp} are in nanoseconds and monotonic,
    826      * but can not be compared to timestamps from other subsystems
    827      * (e.g. accelerometer, gyro etc.), or other instances of the same or different
    828      * camera devices in the same system. Timestamps between streams and results for
    829      * a single camera instance are comparable, and the timestamps for all buffers
    830      * and the result metadata generated by a single capture are identical.</p>
    831      *
    832      * @see CaptureResult#SENSOR_TIMESTAMP
    833      * @see CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE
    834      */
    835     public static final int SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN = 0;
    836 
    837     /**
    838      * <p>Timestamps from {@link CaptureResult#SENSOR_TIMESTAMP android.sensor.timestamp} are in the same timebase as
    839      * {@link android.os.SystemClock#elapsedRealtimeNanos },
    840      * and they can be compared to other timestamps using that base.</p>
    841      *
    842      * @see CaptureResult#SENSOR_TIMESTAMP
    843      * @see CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE
    844      */
    845     public static final int SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME = 1;
    846 
    847     //
    848     // Enumeration values for CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    849     //
    850 
    851     /**
    852      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    853      */
    854     public static final int SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT = 1;
    855 
    856     /**
    857      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    858      */
    859     public static final int SENSOR_REFERENCE_ILLUMINANT1_FLUORESCENT = 2;
    860 
    861     /**
    862      * <p>Incandescent light</p>
    863      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    864      */
    865     public static final int SENSOR_REFERENCE_ILLUMINANT1_TUNGSTEN = 3;
    866 
    867     /**
    868      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    869      */
    870     public static final int SENSOR_REFERENCE_ILLUMINANT1_FLASH = 4;
    871 
    872     /**
    873      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    874      */
    875     public static final int SENSOR_REFERENCE_ILLUMINANT1_FINE_WEATHER = 9;
    876 
    877     /**
    878      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    879      */
    880     public static final int SENSOR_REFERENCE_ILLUMINANT1_CLOUDY_WEATHER = 10;
    881 
    882     /**
    883      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    884      */
    885     public static final int SENSOR_REFERENCE_ILLUMINANT1_SHADE = 11;
    886 
    887     /**
    888      * <p>D 5700 - 7100K</p>
    889      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    890      */
    891     public static final int SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT_FLUORESCENT = 12;
    892 
    893     /**
    894      * <p>N 4600 - 5400K</p>
    895      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    896      */
    897     public static final int SENSOR_REFERENCE_ILLUMINANT1_DAY_WHITE_FLUORESCENT = 13;
    898 
    899     /**
    900      * <p>W 3900 - 4500K</p>
    901      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    902      */
    903     public static final int SENSOR_REFERENCE_ILLUMINANT1_COOL_WHITE_FLUORESCENT = 14;
    904 
    905     /**
    906      * <p>WW 3200 - 3700K</p>
    907      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    908      */
    909     public static final int SENSOR_REFERENCE_ILLUMINANT1_WHITE_FLUORESCENT = 15;
    910 
    911     /**
    912      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    913      */
    914     public static final int SENSOR_REFERENCE_ILLUMINANT1_STANDARD_A = 17;
    915 
    916     /**
    917      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    918      */
    919     public static final int SENSOR_REFERENCE_ILLUMINANT1_STANDARD_B = 18;
    920 
    921     /**
    922      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    923      */
    924     public static final int SENSOR_REFERENCE_ILLUMINANT1_STANDARD_C = 19;
    925 
    926     /**
    927      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    928      */
    929     public static final int SENSOR_REFERENCE_ILLUMINANT1_D55 = 20;
    930 
    931     /**
    932      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    933      */
    934     public static final int SENSOR_REFERENCE_ILLUMINANT1_D65 = 21;
    935 
    936     /**
    937      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    938      */
    939     public static final int SENSOR_REFERENCE_ILLUMINANT1_D75 = 22;
    940 
    941     /**
    942      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    943      */
    944     public static final int SENSOR_REFERENCE_ILLUMINANT1_D50 = 23;
    945 
    946     /**
    947      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
    948      */
    949     public static final int SENSOR_REFERENCE_ILLUMINANT1_ISO_STUDIO_TUNGSTEN = 24;
    950 
    951     //
    952     // Enumeration values for CameraCharacteristics#LED_AVAILABLE_LEDS
    953     //
    954 
    955     /**
    956      * <p>android.led.transmit control is used.</p>
    957      * @see CameraCharacteristics#LED_AVAILABLE_LEDS
    958      * @hide
    959      */
    960     public static final int LED_AVAILABLE_LEDS_TRANSMIT = 0;
    961 
    962     //
    963     // Enumeration values for CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
    964     //
    965 
    966     /**
    967      * <p>This camera device does not have enough capabilities to qualify as a <code>FULL</code> device or
    968      * better.</p>
    969      * <p>Only the stream configurations listed in the <code>LEGACY</code> and <code>LIMITED</code> tables in the
    970      * {@link android.hardware.camera2.CameraDevice#createCaptureSession createCaptureSession} documentation are guaranteed to be supported.</p>
    971      * <p>All <code>LIMITED</code> devices support the <code>BACKWARDS_COMPATIBLE</code> capability, indicating basic
    972      * support for color image capture. The only exception is that the device may
    973      * alternatively support only the <code>DEPTH_OUTPUT</code> capability, if it can only output depth
    974      * measurements and not color images.</p>
    975      * <p><code>LIMITED</code> devices and above require the use of {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}
    976      * to lock exposure metering (and calculate flash power, for cameras with flash) before
    977      * capturing a high-quality still image.</p>
    978      * <p>A <code>LIMITED</code> device that only lists the <code>BACKWARDS_COMPATIBLE</code> capability is only
    979      * required to support full-automatic operation and post-processing (<code>OFF</code> is not
    980      * supported for {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode}, {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}, or
    981      * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode})</p>
    982      * <p>Additional capabilities may optionally be supported by a <code>LIMITED</code>-level device, and
    983      * can be checked for in {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}.</p>
    984      *
    985      * @see CaptureRequest#CONTROL_AE_MODE
    986      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
    987      * @see CaptureRequest#CONTROL_AF_MODE
    988      * @see CaptureRequest#CONTROL_AWB_MODE
    989      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
    990      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
    991      */
    992     public static final int INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED = 0;
    993 
    994     /**
    995      * <p>This camera device is capable of supporting advanced imaging applications.</p>
    996      * <p>The stream configurations listed in the <code>FULL</code>, <code>LEGACY</code> and <code>LIMITED</code> tables in the
    997      * {@link android.hardware.camera2.CameraDevice#createCaptureSession createCaptureSession} documentation are guaranteed to be supported.</p>
    998      * <p>A <code>FULL</code> device will support below capabilities:</p>
    999      * <ul>
   1000      * <li><code>BURST_CAPTURE</code> capability ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains
   1001      *   <code>BURST_CAPTURE</code>)</li>
   1002      * <li>Per frame control ({@link CameraCharacteristics#SYNC_MAX_LATENCY android.sync.maxLatency} <code>==</code> PER_FRAME_CONTROL)</li>
   1003      * <li>Manual sensor control ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains <code>MANUAL_SENSOR</code>)</li>
   1004      * <li>Manual post-processing control ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains
   1005      *   <code>MANUAL_POST_PROCESSING</code>)</li>
   1006      * <li>The required exposure time range defined in {@link CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE android.sensor.info.exposureTimeRange}</li>
   1007      * <li>The required maxFrameDuration defined in {@link CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION android.sensor.info.maxFrameDuration}</li>
   1008      * </ul>
   1009      * <p>Note:
   1010      * Pre-API level 23, FULL devices also supported arbitrary cropping region
   1011      * ({@link CameraCharacteristics#SCALER_CROPPING_TYPE android.scaler.croppingType} <code>== FREEFORM</code>); this requirement was relaxed in API level
   1012      * 23, and <code>FULL</code> devices may only support <code>CENTERED</code> cropping.</p>
   1013      *
   1014      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
   1015      * @see CameraCharacteristics#SCALER_CROPPING_TYPE
   1016      * @see CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE
   1017      * @see CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION
   1018      * @see CameraCharacteristics#SYNC_MAX_LATENCY
   1019      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
   1020      */
   1021     public static final int INFO_SUPPORTED_HARDWARE_LEVEL_FULL = 1;
   1022 
   1023     /**
   1024      * <p>This camera device is running in backward compatibility mode.</p>
   1025      * <p>Only the stream configurations listed in the <code>LEGACY</code> table in the {@link android.hardware.camera2.CameraDevice#createCaptureSession createCaptureSession}
   1026      * documentation are supported.</p>
   1027      * <p>A <code>LEGACY</code> device does not support per-frame control, manual sensor control, manual
   1028      * post-processing, arbitrary cropping regions, and has relaxed performance constraints.
   1029      * No additional capabilities beyond <code>BACKWARD_COMPATIBLE</code> will ever be listed by a
   1030      * <code>LEGACY</code> device in {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}.</p>
   1031      * <p>In addition, the {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is not functional on <code>LEGACY</code>
   1032      * devices. Instead, every request that includes a JPEG-format output target is treated
   1033      * as triggering a still capture, internally executing a precapture trigger.  This may
   1034      * fire the flash for flash power metering during precapture, and then fire the flash
   1035      * for the final capture, if a flash is available on the device and the AE mode is set to
   1036      * enable the flash.</p>
   1037      *
   1038      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1039      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
   1040      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
   1041      */
   1042     public static final int INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY = 2;
   1043 
   1044     /**
   1045      * <p>This camera device is capable of YUV reprocessing and RAW data capture, in addition to
   1046      * FULL-level capabilities.</p>
   1047      * <p>The stream configurations listed in the <code>LEVEL_3</code>, <code>RAW</code>, <code>FULL</code>, <code>LEGACY</code> and
   1048      * <code>LIMITED</code> tables in the {@link android.hardware.camera2.CameraDevice#createCaptureSession createCaptureSession}
   1049      * documentation are guaranteed to be supported.</p>
   1050      * <p>The following additional capabilities are guaranteed to be supported:</p>
   1051      * <ul>
   1052      * <li><code>YUV_REPROCESSING</code> capability ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains
   1053      *   <code>YUV_REPROCESSING</code>)</li>
   1054      * <li><code>RAW</code> capability ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains
   1055      *   <code>RAW</code>)</li>
   1056      * </ul>
   1057      *
   1058      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
   1059      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
   1060      */
   1061     public static final int INFO_SUPPORTED_HARDWARE_LEVEL_3 = 3;
   1062 
   1063     //
   1064     // Enumeration values for CameraCharacteristics#SYNC_MAX_LATENCY
   1065     //
   1066 
   1067     /**
   1068      * <p>Every frame has the requests immediately applied.</p>
   1069      * <p>Changing controls over multiple requests one after another will
   1070      * produce results that have those controls applied atomically
   1071      * each frame.</p>
   1072      * <p>All FULL capability devices will have this as their maxLatency.</p>
   1073      * @see CameraCharacteristics#SYNC_MAX_LATENCY
   1074      */
   1075     public static final int SYNC_MAX_LATENCY_PER_FRAME_CONTROL = 0;
   1076 
   1077     /**
   1078      * <p>Each new frame has some subset (potentially the entire set)
   1079      * of the past requests applied to the camera settings.</p>
   1080      * <p>By submitting a series of identical requests, the camera device
   1081      * will eventually have the camera settings applied, but it is
   1082      * unknown when that exact point will be.</p>
   1083      * <p>All LEGACY capability devices will have this as their maxLatency.</p>
   1084      * @see CameraCharacteristics#SYNC_MAX_LATENCY
   1085      */
   1086     public static final int SYNC_MAX_LATENCY_UNKNOWN = -1;
   1087 
   1088     //
   1089     // Enumeration values for CaptureRequest#COLOR_CORRECTION_MODE
   1090     //
   1091 
   1092     /**
   1093      * <p>Use the {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform} matrix
   1094      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} to do color conversion.</p>
   1095      * <p>All advanced white balance adjustments (not specified
   1096      * by our white balance pipeline) must be disabled.</p>
   1097      * <p>If AWB is enabled with <code>{@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} != OFF</code>, then
   1098      * TRANSFORM_MATRIX is ignored. The camera device will override
   1099      * this value to either FAST or HIGH_QUALITY.</p>
   1100      *
   1101      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1102      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1103      * @see CaptureRequest#CONTROL_AWB_MODE
   1104      * @see CaptureRequest#COLOR_CORRECTION_MODE
   1105      */
   1106     public static final int COLOR_CORRECTION_MODE_TRANSFORM_MATRIX = 0;
   1107 
   1108     /**
   1109      * <p>Color correction processing must not slow down
   1110      * capture rate relative to sensor raw output.</p>
   1111      * <p>Advanced white balance adjustments above and beyond
   1112      * the specified white balance pipeline may be applied.</p>
   1113      * <p>If AWB is enabled with <code>{@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} != OFF</code>, then
   1114      * the camera device uses the last frame's AWB values
   1115      * (or defaults if AWB has never been run).</p>
   1116      *
   1117      * @see CaptureRequest#CONTROL_AWB_MODE
   1118      * @see CaptureRequest#COLOR_CORRECTION_MODE
   1119      */
   1120     public static final int COLOR_CORRECTION_MODE_FAST = 1;
   1121 
   1122     /**
   1123      * <p>Color correction processing operates at improved
   1124      * quality but the capture rate might be reduced (relative to sensor
   1125      * raw output rate)</p>
   1126      * <p>Advanced white balance adjustments above and beyond
   1127      * the specified white balance pipeline may be applied.</p>
   1128      * <p>If AWB is enabled with <code>{@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} != OFF</code>, then
   1129      * the camera device uses the last frame's AWB values
   1130      * (or defaults if AWB has never been run).</p>
   1131      *
   1132      * @see CaptureRequest#CONTROL_AWB_MODE
   1133      * @see CaptureRequest#COLOR_CORRECTION_MODE
   1134      */
   1135     public static final int COLOR_CORRECTION_MODE_HIGH_QUALITY = 2;
   1136 
   1137     //
   1138     // Enumeration values for CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
   1139     //
   1140 
   1141     /**
   1142      * <p>No aberration correction is applied.</p>
   1143      * @see CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
   1144      */
   1145     public static final int COLOR_CORRECTION_ABERRATION_MODE_OFF = 0;
   1146 
   1147     /**
   1148      * <p>Aberration correction will not slow down capture rate
   1149      * relative to sensor raw output.</p>
   1150      * @see CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
   1151      */
   1152     public static final int COLOR_CORRECTION_ABERRATION_MODE_FAST = 1;
   1153 
   1154     /**
   1155      * <p>Aberration correction operates at improved quality but the capture rate might be
   1156      * reduced (relative to sensor raw output rate)</p>
   1157      * @see CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
   1158      */
   1159     public static final int COLOR_CORRECTION_ABERRATION_MODE_HIGH_QUALITY = 2;
   1160 
   1161     //
   1162     // Enumeration values for CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
   1163     //
   1164 
   1165     /**
   1166      * <p>The camera device will not adjust exposure duration to
   1167      * avoid banding problems.</p>
   1168      * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
   1169      */
   1170     public static final int CONTROL_AE_ANTIBANDING_MODE_OFF = 0;
   1171 
   1172     /**
   1173      * <p>The camera device will adjust exposure duration to
   1174      * avoid banding problems with 50Hz illumination sources.</p>
   1175      * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
   1176      */
   1177     public static final int CONTROL_AE_ANTIBANDING_MODE_50HZ = 1;
   1178 
   1179     /**
   1180      * <p>The camera device will adjust exposure duration to
   1181      * avoid banding problems with 60Hz illumination
   1182      * sources.</p>
   1183      * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
   1184      */
   1185     public static final int CONTROL_AE_ANTIBANDING_MODE_60HZ = 2;
   1186 
   1187     /**
   1188      * <p>The camera device will automatically adapt its
   1189      * antibanding routine to the current illumination
   1190      * condition. This is the default mode if AUTO is
   1191      * available on given camera device.</p>
   1192      * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
   1193      */
   1194     public static final int CONTROL_AE_ANTIBANDING_MODE_AUTO = 3;
   1195 
   1196     //
   1197     // Enumeration values for CaptureRequest#CONTROL_AE_MODE
   1198     //
   1199 
   1200     /**
   1201      * <p>The camera device's autoexposure routine is disabled.</p>
   1202      * <p>The application-selected {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime},
   1203      * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity} and
   1204      * {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} are used by the camera
   1205      * device, along with android.flash.* fields, if there's
   1206      * a flash unit for this camera device.</p>
   1207      * <p>Note that auto-white balance (AWB) and auto-focus (AF)
   1208      * behavior is device dependent when AE is in OFF mode.
   1209      * To have consistent behavior across different devices,
   1210      * it is recommended to either set AWB and AF to OFF mode
   1211      * or lock AWB and AF before setting AE to OFF.
   1212      * See {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode},
   1213      * {@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock}, and {@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}
   1214      * for more details.</p>
   1215      * <p>LEGACY devices do not support the OFF mode and will
   1216      * override attempts to use this value to ON.</p>
   1217      *
   1218      * @see CaptureRequest#CONTROL_AF_MODE
   1219      * @see CaptureRequest#CONTROL_AF_TRIGGER
   1220      * @see CaptureRequest#CONTROL_AWB_LOCK
   1221      * @see CaptureRequest#CONTROL_AWB_MODE
   1222      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
   1223      * @see CaptureRequest#SENSOR_FRAME_DURATION
   1224      * @see CaptureRequest#SENSOR_SENSITIVITY
   1225      * @see CaptureRequest#CONTROL_AE_MODE
   1226      */
   1227     public static final int CONTROL_AE_MODE_OFF = 0;
   1228 
   1229     /**
   1230      * <p>The camera device's autoexposure routine is active,
   1231      * with no flash control.</p>
   1232      * <p>The application's values for
   1233      * {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime},
   1234      * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and
   1235      * {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} are ignored. The
   1236      * application has control over the various
   1237      * android.flash.* fields.</p>
   1238      *
   1239      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
   1240      * @see CaptureRequest#SENSOR_FRAME_DURATION
   1241      * @see CaptureRequest#SENSOR_SENSITIVITY
   1242      * @see CaptureRequest#CONTROL_AE_MODE
   1243      */
   1244     public static final int CONTROL_AE_MODE_ON = 1;
   1245 
   1246     /**
   1247      * <p>Like ON, except that the camera device also controls
   1248      * the camera's flash unit, firing it in low-light
   1249      * conditions.</p>
   1250      * <p>The flash may be fired during a precapture sequence
   1251      * (triggered by {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}) and
   1252      * may be fired for captures for which the
   1253      * {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} field is set to
   1254      * STILL_CAPTURE</p>
   1255      *
   1256      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1257      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1258      * @see CaptureRequest#CONTROL_AE_MODE
   1259      */
   1260     public static final int CONTROL_AE_MODE_ON_AUTO_FLASH = 2;
   1261 
   1262     /**
   1263      * <p>Like ON, except that the camera device also controls
   1264      * the camera's flash unit, always firing it for still
   1265      * captures.</p>
   1266      * <p>The flash may be fired during a precapture sequence
   1267      * (triggered by {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}) and
   1268      * will always be fired for captures for which the
   1269      * {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} field is set to
   1270      * STILL_CAPTURE</p>
   1271      *
   1272      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1273      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1274      * @see CaptureRequest#CONTROL_AE_MODE
   1275      */
   1276     public static final int CONTROL_AE_MODE_ON_ALWAYS_FLASH = 3;
   1277 
   1278     /**
   1279      * <p>Like ON_AUTO_FLASH, but with automatic red eye
   1280      * reduction.</p>
   1281      * <p>If deemed necessary by the camera device, a red eye
   1282      * reduction flash will fire during the precapture
   1283      * sequence.</p>
   1284      * @see CaptureRequest#CONTROL_AE_MODE
   1285      */
   1286     public static final int CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE = 4;
   1287 
   1288     //
   1289     // Enumeration values for CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1290     //
   1291 
   1292     /**
   1293      * <p>The trigger is idle.</p>
   1294      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1295      */
   1296     public static final int CONTROL_AE_PRECAPTURE_TRIGGER_IDLE = 0;
   1297 
   1298     /**
   1299      * <p>The precapture metering sequence will be started
   1300      * by the camera device.</p>
   1301      * <p>The exact effect of the precapture trigger depends on
   1302      * the current AE mode and state.</p>
   1303      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1304      */
   1305     public static final int CONTROL_AE_PRECAPTURE_TRIGGER_START = 1;
   1306 
   1307     /**
   1308      * <p>The camera device will cancel any currently active or completed
   1309      * precapture metering sequence, the auto-exposure routine will return to its
   1310      * initial state.</p>
   1311      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1312      */
   1313     public static final int CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL = 2;
   1314 
   1315     //
   1316     // Enumeration values for CaptureRequest#CONTROL_AF_MODE
   1317     //
   1318 
   1319     /**
   1320      * <p>The auto-focus routine does not control the lens;
   1321      * {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance} is controlled by the
   1322      * application.</p>
   1323      *
   1324      * @see CaptureRequest#LENS_FOCUS_DISTANCE
   1325      * @see CaptureRequest#CONTROL_AF_MODE
   1326      */
   1327     public static final int CONTROL_AF_MODE_OFF = 0;
   1328 
   1329     /**
   1330      * <p>Basic automatic focus mode.</p>
   1331      * <p>In this mode, the lens does not move unless
   1332      * the autofocus trigger action is called. When that trigger
   1333      * is activated, AF will transition to ACTIVE_SCAN, then to
   1334      * the outcome of the scan (FOCUSED or NOT_FOCUSED).</p>
   1335      * <p>Always supported if lens is not fixed focus.</p>
   1336      * <p>Use {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance} to determine if lens
   1337      * is fixed-focus.</p>
   1338      * <p>Triggering AF_CANCEL resets the lens position to default,
   1339      * and sets the AF state to INACTIVE.</p>
   1340      *
   1341      * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE
   1342      * @see CaptureRequest#CONTROL_AF_MODE
   1343      */
   1344     public static final int CONTROL_AF_MODE_AUTO = 1;
   1345 
   1346     /**
   1347      * <p>Close-up focusing mode.</p>
   1348      * <p>In this mode, the lens does not move unless the
   1349      * autofocus trigger action is called. When that trigger is
   1350      * activated, AF will transition to ACTIVE_SCAN, then to
   1351      * the outcome of the scan (FOCUSED or NOT_FOCUSED). This
   1352      * mode is optimized for focusing on objects very close to
   1353      * the camera.</p>
   1354      * <p>When that trigger is activated, AF will transition to
   1355      * ACTIVE_SCAN, then to the outcome of the scan (FOCUSED or
   1356      * NOT_FOCUSED). Triggering cancel AF resets the lens
   1357      * position to default, and sets the AF state to
   1358      * INACTIVE.</p>
   1359      * @see CaptureRequest#CONTROL_AF_MODE
   1360      */
   1361     public static final int CONTROL_AF_MODE_MACRO = 2;
   1362 
   1363     /**
   1364      * <p>In this mode, the AF algorithm modifies the lens
   1365      * position continually to attempt to provide a
   1366      * constantly-in-focus image stream.</p>
   1367      * <p>The focusing behavior should be suitable for good quality
   1368      * video recording; typically this means slower focus
   1369      * movement and no overshoots. When the AF trigger is not
   1370      * involved, the AF algorithm should start in INACTIVE state,
   1371      * and then transition into PASSIVE_SCAN and PASSIVE_FOCUSED
   1372      * states as appropriate. When the AF trigger is activated,
   1373      * the algorithm should immediately transition into
   1374      * AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the
   1375      * lens position until a cancel AF trigger is received.</p>
   1376      * <p>Once cancel is received, the algorithm should transition
   1377      * back to INACTIVE and resume passive scan. Note that this
   1378      * behavior is not identical to CONTINUOUS_PICTURE, since an
   1379      * ongoing PASSIVE_SCAN must immediately be
   1380      * canceled.</p>
   1381      * @see CaptureRequest#CONTROL_AF_MODE
   1382      */
   1383     public static final int CONTROL_AF_MODE_CONTINUOUS_VIDEO = 3;
   1384 
   1385     /**
   1386      * <p>In this mode, the AF algorithm modifies the lens
   1387      * position continually to attempt to provide a
   1388      * constantly-in-focus image stream.</p>
   1389      * <p>The focusing behavior should be suitable for still image
   1390      * capture; typically this means focusing as fast as
   1391      * possible. When the AF trigger is not involved, the AF
   1392      * algorithm should start in INACTIVE state, and then
   1393      * transition into PASSIVE_SCAN and PASSIVE_FOCUSED states as
   1394      * appropriate as it attempts to maintain focus. When the AF
   1395      * trigger is activated, the algorithm should finish its
   1396      * PASSIVE_SCAN if active, and then transition into
   1397      * AF_FOCUSED or AF_NOT_FOCUSED as appropriate, and lock the
   1398      * lens position until a cancel AF trigger is received.</p>
   1399      * <p>When the AF cancel trigger is activated, the algorithm
   1400      * should transition back to INACTIVE and then act as if it
   1401      * has just been started.</p>
   1402      * @see CaptureRequest#CONTROL_AF_MODE
   1403      */
   1404     public static final int CONTROL_AF_MODE_CONTINUOUS_PICTURE = 4;
   1405 
   1406     /**
   1407      * <p>Extended depth of field (digital focus) mode.</p>
   1408      * <p>The camera device will produce images with an extended
   1409      * depth of field automatically; no special focusing
   1410      * operations need to be done before taking a picture.</p>
   1411      * <p>AF triggers are ignored, and the AF state will always be
   1412      * INACTIVE.</p>
   1413      * @see CaptureRequest#CONTROL_AF_MODE
   1414      */
   1415     public static final int CONTROL_AF_MODE_EDOF = 5;
   1416 
   1417     //
   1418     // Enumeration values for CaptureRequest#CONTROL_AF_TRIGGER
   1419     //
   1420 
   1421     /**
   1422      * <p>The trigger is idle.</p>
   1423      * @see CaptureRequest#CONTROL_AF_TRIGGER
   1424      */
   1425     public static final int CONTROL_AF_TRIGGER_IDLE = 0;
   1426 
   1427     /**
   1428      * <p>Autofocus will trigger now.</p>
   1429      * @see CaptureRequest#CONTROL_AF_TRIGGER
   1430      */
   1431     public static final int CONTROL_AF_TRIGGER_START = 1;
   1432 
   1433     /**
   1434      * <p>Autofocus will return to its initial
   1435      * state, and cancel any currently active trigger.</p>
   1436      * @see CaptureRequest#CONTROL_AF_TRIGGER
   1437      */
   1438     public static final int CONTROL_AF_TRIGGER_CANCEL = 2;
   1439 
   1440     //
   1441     // Enumeration values for CaptureRequest#CONTROL_AWB_MODE
   1442     //
   1443 
   1444     /**
   1445      * <p>The camera device's auto-white balance routine is disabled.</p>
   1446      * <p>The application-selected color transform matrix
   1447      * ({@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}) and gains
   1448      * ({@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains}) are used by the camera
   1449      * device for manual white balance control.</p>
   1450      *
   1451      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1452      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1453      * @see CaptureRequest#CONTROL_AWB_MODE
   1454      */
   1455     public static final int CONTROL_AWB_MODE_OFF = 0;
   1456 
   1457     /**
   1458      * <p>The camera device's auto-white balance routine is active.</p>
   1459      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1460      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1461      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1462      * values used by the camera device for the transform and gains
   1463      * will be available in the capture result for this request.</p>
   1464      *
   1465      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1466      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1467      * @see CaptureRequest#CONTROL_AWB_MODE
   1468      */
   1469     public static final int CONTROL_AWB_MODE_AUTO = 1;
   1470 
   1471     /**
   1472      * <p>The camera device's auto-white balance routine is disabled;
   1473      * the camera device uses incandescent light as the assumed scene
   1474      * illumination for white balance.</p>
   1475      * <p>While the exact white balance transforms are up to the
   1476      * camera device, they will approximately match the CIE
   1477      * standard illuminant A.</p>
   1478      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1479      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1480      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1481      * values used by the camera device for the transform and gains
   1482      * will be available in the capture result for this request.</p>
   1483      *
   1484      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1485      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1486      * @see CaptureRequest#CONTROL_AWB_MODE
   1487      */
   1488     public static final int CONTROL_AWB_MODE_INCANDESCENT = 2;
   1489 
   1490     /**
   1491      * <p>The camera device's auto-white balance routine is disabled;
   1492      * the camera device uses fluorescent light as the assumed scene
   1493      * illumination for white balance.</p>
   1494      * <p>While the exact white balance transforms are up to the
   1495      * camera device, they will approximately match the CIE
   1496      * standard illuminant F2.</p>
   1497      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1498      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1499      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1500      * values used by the camera device for the transform and gains
   1501      * will be available in the capture result for this request.</p>
   1502      *
   1503      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1504      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1505      * @see CaptureRequest#CONTROL_AWB_MODE
   1506      */
   1507     public static final int CONTROL_AWB_MODE_FLUORESCENT = 3;
   1508 
   1509     /**
   1510      * <p>The camera device's auto-white balance routine is disabled;
   1511      * the camera device uses warm fluorescent light as the assumed scene
   1512      * illumination for white balance.</p>
   1513      * <p>While the exact white balance transforms are up to the
   1514      * camera device, they will approximately match the CIE
   1515      * standard illuminant F4.</p>
   1516      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1517      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1518      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1519      * values used by the camera device for the transform and gains
   1520      * will be available in the capture result for this request.</p>
   1521      *
   1522      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1523      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1524      * @see CaptureRequest#CONTROL_AWB_MODE
   1525      */
   1526     public static final int CONTROL_AWB_MODE_WARM_FLUORESCENT = 4;
   1527 
   1528     /**
   1529      * <p>The camera device's auto-white balance routine is disabled;
   1530      * the camera device uses daylight light as the assumed scene
   1531      * illumination for white balance.</p>
   1532      * <p>While the exact white balance transforms are up to the
   1533      * camera device, they will approximately match the CIE
   1534      * standard illuminant D65.</p>
   1535      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1536      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1537      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1538      * values used by the camera device for the transform and gains
   1539      * will be available in the capture result for this request.</p>
   1540      *
   1541      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1542      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1543      * @see CaptureRequest#CONTROL_AWB_MODE
   1544      */
   1545     public static final int CONTROL_AWB_MODE_DAYLIGHT = 5;
   1546 
   1547     /**
   1548      * <p>The camera device's auto-white balance routine is disabled;
   1549      * the camera device uses cloudy daylight light as the assumed scene
   1550      * illumination for white balance.</p>
   1551      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1552      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1553      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1554      * values used by the camera device for the transform and gains
   1555      * will be available in the capture result for this request.</p>
   1556      *
   1557      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1558      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1559      * @see CaptureRequest#CONTROL_AWB_MODE
   1560      */
   1561     public static final int CONTROL_AWB_MODE_CLOUDY_DAYLIGHT = 6;
   1562 
   1563     /**
   1564      * <p>The camera device's auto-white balance routine is disabled;
   1565      * the camera device uses twilight light as the assumed scene
   1566      * illumination for white balance.</p>
   1567      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1568      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1569      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1570      * values used by the camera device for the transform and gains
   1571      * will be available in the capture result for this request.</p>
   1572      *
   1573      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1574      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1575      * @see CaptureRequest#CONTROL_AWB_MODE
   1576      */
   1577     public static final int CONTROL_AWB_MODE_TWILIGHT = 7;
   1578 
   1579     /**
   1580      * <p>The camera device's auto-white balance routine is disabled;
   1581      * the camera device uses shade light as the assumed scene
   1582      * illumination for white balance.</p>
   1583      * <p>The application's values for {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}
   1584      * and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} are ignored.
   1585      * For devices that support the MANUAL_POST_PROCESSING capability, the
   1586      * values used by the camera device for the transform and gains
   1587      * will be available in the capture result for this request.</p>
   1588      *
   1589      * @see CaptureRequest#COLOR_CORRECTION_GAINS
   1590      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
   1591      * @see CaptureRequest#CONTROL_AWB_MODE
   1592      */
   1593     public static final int CONTROL_AWB_MODE_SHADE = 8;
   1594 
   1595     //
   1596     // Enumeration values for CaptureRequest#CONTROL_CAPTURE_INTENT
   1597     //
   1598 
   1599     /**
   1600      * <p>The goal of this request doesn't fall into the other
   1601      * categories. The camera device will default to preview-like
   1602      * behavior.</p>
   1603      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1604      */
   1605     public static final int CONTROL_CAPTURE_INTENT_CUSTOM = 0;
   1606 
   1607     /**
   1608      * <p>This request is for a preview-like use case.</p>
   1609      * <p>The precapture trigger may be used to start off a metering
   1610      * w/flash sequence.</p>
   1611      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1612      */
   1613     public static final int CONTROL_CAPTURE_INTENT_PREVIEW = 1;
   1614 
   1615     /**
   1616      * <p>This request is for a still capture-type
   1617      * use case.</p>
   1618      * <p>If the flash unit is under automatic control, it may fire as needed.</p>
   1619      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1620      */
   1621     public static final int CONTROL_CAPTURE_INTENT_STILL_CAPTURE = 2;
   1622 
   1623     /**
   1624      * <p>This request is for a video recording
   1625      * use case.</p>
   1626      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1627      */
   1628     public static final int CONTROL_CAPTURE_INTENT_VIDEO_RECORD = 3;
   1629 
   1630     /**
   1631      * <p>This request is for a video snapshot (still
   1632      * image while recording video) use case.</p>
   1633      * <p>The camera device should take the highest-quality image
   1634      * possible (given the other settings) without disrupting the
   1635      * frame rate of video recording.  </p>
   1636      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1637      */
   1638     public static final int CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT = 4;
   1639 
   1640     /**
   1641      * <p>This request is for a ZSL usecase; the
   1642      * application will stream full-resolution images and
   1643      * reprocess one or several later for a final
   1644      * capture.</p>
   1645      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1646      */
   1647     public static final int CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG = 5;
   1648 
   1649     /**
   1650      * <p>This request is for manual capture use case where
   1651      * the applications want to directly control the capture parameters.</p>
   1652      * <p>For example, the application may wish to manually control
   1653      * {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}, {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, etc.</p>
   1654      *
   1655      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
   1656      * @see CaptureRequest#SENSOR_SENSITIVITY
   1657      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1658      */
   1659     public static final int CONTROL_CAPTURE_INTENT_MANUAL = 6;
   1660 
   1661     //
   1662     // Enumeration values for CaptureRequest#CONTROL_EFFECT_MODE
   1663     //
   1664 
   1665     /**
   1666      * <p>No color effect will be applied.</p>
   1667      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1668      */
   1669     public static final int CONTROL_EFFECT_MODE_OFF = 0;
   1670 
   1671     /**
   1672      * <p>A "monocolor" effect where the image is mapped into
   1673      * a single color.</p>
   1674      * <p>This will typically be grayscale.</p>
   1675      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1676      */
   1677     public static final int CONTROL_EFFECT_MODE_MONO = 1;
   1678 
   1679     /**
   1680      * <p>A "photo-negative" effect where the image's colors
   1681      * are inverted.</p>
   1682      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1683      */
   1684     public static final int CONTROL_EFFECT_MODE_NEGATIVE = 2;
   1685 
   1686     /**
   1687      * <p>A "solarisation" effect (Sabattier effect) where the
   1688      * image is wholly or partially reversed in
   1689      * tone.</p>
   1690      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1691      */
   1692     public static final int CONTROL_EFFECT_MODE_SOLARIZE = 3;
   1693 
   1694     /**
   1695      * <p>A "sepia" effect where the image is mapped into warm
   1696      * gray, red, and brown tones.</p>
   1697      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1698      */
   1699     public static final int CONTROL_EFFECT_MODE_SEPIA = 4;
   1700 
   1701     /**
   1702      * <p>A "posterization" effect where the image uses
   1703      * discrete regions of tone rather than a continuous
   1704      * gradient of tones.</p>
   1705      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1706      */
   1707     public static final int CONTROL_EFFECT_MODE_POSTERIZE = 5;
   1708 
   1709     /**
   1710      * <p>A "whiteboard" effect where the image is typically displayed
   1711      * as regions of white, with black or grey details.</p>
   1712      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1713      */
   1714     public static final int CONTROL_EFFECT_MODE_WHITEBOARD = 6;
   1715 
   1716     /**
   1717      * <p>A "blackboard" effect where the image is typically displayed
   1718      * as regions of black, with white or grey details.</p>
   1719      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1720      */
   1721     public static final int CONTROL_EFFECT_MODE_BLACKBOARD = 7;
   1722 
   1723     /**
   1724      * <p>An "aqua" effect where a blue hue is added to the image.</p>
   1725      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1726      */
   1727     public static final int CONTROL_EFFECT_MODE_AQUA = 8;
   1728 
   1729     //
   1730     // Enumeration values for CaptureRequest#CONTROL_MODE
   1731     //
   1732 
   1733     /**
   1734      * <p>Full application control of pipeline.</p>
   1735      * <p>All control by the device's metering and focusing (3A)
   1736      * routines is disabled, and no other settings in
   1737      * android.control.* have any effect, except that
   1738      * {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} may be used by the camera
   1739      * device to select post-processing values for processing
   1740      * blocks that do not allow for manual control, or are not
   1741      * exposed by the camera API.</p>
   1742      * <p>However, the camera device's 3A routines may continue to
   1743      * collect statistics and update their internal state so that
   1744      * when control is switched to AUTO mode, good control values
   1745      * can be immediately applied.</p>
   1746      *
   1747      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   1748      * @see CaptureRequest#CONTROL_MODE
   1749      */
   1750     public static final int CONTROL_MODE_OFF = 0;
   1751 
   1752     /**
   1753      * <p>Use settings for each individual 3A routine.</p>
   1754      * <p>Manual control of capture parameters is disabled. All
   1755      * controls in android.control.* besides sceneMode take
   1756      * effect.</p>
   1757      * @see CaptureRequest#CONTROL_MODE
   1758      */
   1759     public static final int CONTROL_MODE_AUTO = 1;
   1760 
   1761     /**
   1762      * <p>Use a specific scene mode.</p>
   1763      * <p>Enabling this disables control.aeMode, control.awbMode and
   1764      * control.afMode controls; the camera device will ignore
   1765      * those settings while USE_SCENE_MODE is active (except for
   1766      * FACE_PRIORITY scene mode). Other control entries are still active.
   1767      * This setting can only be used if scene mode is supported (i.e.
   1768      * {@link CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES android.control.availableSceneModes}
   1769      * contain some modes other than DISABLED).</p>
   1770      *
   1771      * @see CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES
   1772      * @see CaptureRequest#CONTROL_MODE
   1773      */
   1774     public static final int CONTROL_MODE_USE_SCENE_MODE = 2;
   1775 
   1776     /**
   1777      * <p>Same as OFF mode, except that this capture will not be
   1778      * used by camera device background auto-exposure, auto-white balance and
   1779      * auto-focus algorithms (3A) to update their statistics.</p>
   1780      * <p>Specifically, the 3A routines are locked to the last
   1781      * values set from a request with AUTO, OFF, or
   1782      * USE_SCENE_MODE, and any statistics or state updates
   1783      * collected from manual captures with OFF_KEEP_STATE will be
   1784      * discarded by the camera device.</p>
   1785      * @see CaptureRequest#CONTROL_MODE
   1786      */
   1787     public static final int CONTROL_MODE_OFF_KEEP_STATE = 3;
   1788 
   1789     //
   1790     // Enumeration values for CaptureRequest#CONTROL_SCENE_MODE
   1791     //
   1792 
   1793     /**
   1794      * <p>Indicates that no scene modes are set for a given capture request.</p>
   1795      * @see CaptureRequest#CONTROL_SCENE_MODE
   1796      */
   1797     public static final int CONTROL_SCENE_MODE_DISABLED = 0;
   1798 
   1799     /**
   1800      * <p>If face detection support exists, use face
   1801      * detection data for auto-focus, auto-white balance, and
   1802      * auto-exposure routines.</p>
   1803      * <p>If face detection statistics are disabled
   1804      * (i.e. {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} is set to OFF),
   1805      * this should still operate correctly (but will not return
   1806      * face detection statistics to the framework).</p>
   1807      * <p>Unlike the other scene modes, {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode},
   1808      * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, and {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}
   1809      * remain active when FACE_PRIORITY is set.</p>
   1810      *
   1811      * @see CaptureRequest#CONTROL_AE_MODE
   1812      * @see CaptureRequest#CONTROL_AF_MODE
   1813      * @see CaptureRequest#CONTROL_AWB_MODE
   1814      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
   1815      * @see CaptureRequest#CONTROL_SCENE_MODE
   1816      */
   1817     public static final int CONTROL_SCENE_MODE_FACE_PRIORITY = 1;
   1818 
   1819     /**
   1820      * <p>Optimized for photos of quickly moving objects.</p>
   1821      * <p>Similar to SPORTS.</p>
   1822      * @see CaptureRequest#CONTROL_SCENE_MODE
   1823      */
   1824     public static final int CONTROL_SCENE_MODE_ACTION = 2;
   1825 
   1826     /**
   1827      * <p>Optimized for still photos of people.</p>
   1828      * @see CaptureRequest#CONTROL_SCENE_MODE
   1829      */
   1830     public static final int CONTROL_SCENE_MODE_PORTRAIT = 3;
   1831 
   1832     /**
   1833      * <p>Optimized for photos of distant macroscopic objects.</p>
   1834      * @see CaptureRequest#CONTROL_SCENE_MODE
   1835      */
   1836     public static final int CONTROL_SCENE_MODE_LANDSCAPE = 4;
   1837 
   1838     /**
   1839      * <p>Optimized for low-light settings.</p>
   1840      * @see CaptureRequest#CONTROL_SCENE_MODE
   1841      */
   1842     public static final int CONTROL_SCENE_MODE_NIGHT = 5;
   1843 
   1844     /**
   1845      * <p>Optimized for still photos of people in low-light
   1846      * settings.</p>
   1847      * @see CaptureRequest#CONTROL_SCENE_MODE
   1848      */
   1849     public static final int CONTROL_SCENE_MODE_NIGHT_PORTRAIT = 6;
   1850 
   1851     /**
   1852      * <p>Optimized for dim, indoor settings where flash must
   1853      * remain off.</p>
   1854      * @see CaptureRequest#CONTROL_SCENE_MODE
   1855      */
   1856     public static final int CONTROL_SCENE_MODE_THEATRE = 7;
   1857 
   1858     /**
   1859      * <p>Optimized for bright, outdoor beach settings.</p>
   1860      * @see CaptureRequest#CONTROL_SCENE_MODE
   1861      */
   1862     public static final int CONTROL_SCENE_MODE_BEACH = 8;
   1863 
   1864     /**
   1865      * <p>Optimized for bright, outdoor settings containing snow.</p>
   1866      * @see CaptureRequest#CONTROL_SCENE_MODE
   1867      */
   1868     public static final int CONTROL_SCENE_MODE_SNOW = 9;
   1869 
   1870     /**
   1871      * <p>Optimized for scenes of the setting sun.</p>
   1872      * @see CaptureRequest#CONTROL_SCENE_MODE
   1873      */
   1874     public static final int CONTROL_SCENE_MODE_SUNSET = 10;
   1875 
   1876     /**
   1877      * <p>Optimized to avoid blurry photos due to small amounts of
   1878      * device motion (for example: due to hand shake).</p>
   1879      * @see CaptureRequest#CONTROL_SCENE_MODE
   1880      */
   1881     public static final int CONTROL_SCENE_MODE_STEADYPHOTO = 11;
   1882 
   1883     /**
   1884      * <p>Optimized for nighttime photos of fireworks.</p>
   1885      * @see CaptureRequest#CONTROL_SCENE_MODE
   1886      */
   1887     public static final int CONTROL_SCENE_MODE_FIREWORKS = 12;
   1888 
   1889     /**
   1890      * <p>Optimized for photos of quickly moving people.</p>
   1891      * <p>Similar to ACTION.</p>
   1892      * @see CaptureRequest#CONTROL_SCENE_MODE
   1893      */
   1894     public static final int CONTROL_SCENE_MODE_SPORTS = 13;
   1895 
   1896     /**
   1897      * <p>Optimized for dim, indoor settings with multiple moving
   1898      * people.</p>
   1899      * @see CaptureRequest#CONTROL_SCENE_MODE
   1900      */
   1901     public static final int CONTROL_SCENE_MODE_PARTY = 14;
   1902 
   1903     /**
   1904      * <p>Optimized for dim settings where the main light source
   1905      * is a flame.</p>
   1906      * @see CaptureRequest#CONTROL_SCENE_MODE
   1907      */
   1908     public static final int CONTROL_SCENE_MODE_CANDLELIGHT = 15;
   1909 
   1910     /**
   1911      * <p>Optimized for accurately capturing a photo of barcode
   1912      * for use by camera applications that wish to read the
   1913      * barcode value.</p>
   1914      * @see CaptureRequest#CONTROL_SCENE_MODE
   1915      */
   1916     public static final int CONTROL_SCENE_MODE_BARCODE = 16;
   1917 
   1918     /**
   1919      * <p>This is deprecated, please use {@link android.hardware.camera2.CameraDevice#createConstrainedHighSpeedCaptureSession }
   1920      * and {@link android.hardware.camera2.CameraConstrainedHighSpeedCaptureSession#createHighSpeedRequestList }
   1921      * for high speed video recording.</p>
   1922      * <p>Optimized for high speed video recording (frame rate &gt;=60fps) use case.</p>
   1923      * <p>The supported high speed video sizes and fps ranges are specified in
   1924      * android.control.availableHighSpeedVideoConfigurations. To get desired
   1925      * output frame rates, the application is only allowed to select video size
   1926      * and fps range combinations listed in this static metadata. The fps range
   1927      * can be control via {@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange}.</p>
   1928      * <p>In this mode, the camera device will override aeMode, awbMode, and afMode to
   1929      * ON, ON, and CONTINUOUS_VIDEO, respectively. All post-processing block mode
   1930      * controls will be overridden to be FAST. Therefore, no manual control of capture
   1931      * and post-processing parameters is possible. All other controls operate the
   1932      * same as when {@link CaptureRequest#CONTROL_MODE android.control.mode} == AUTO. This means that all other
   1933      * android.control.* fields continue to work, such as</p>
   1934      * <ul>
   1935      * <li>{@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange}</li>
   1936      * <li>{@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation}</li>
   1937      * <li>{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock}</li>
   1938      * <li>{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock}</li>
   1939      * <li>{@link CaptureRequest#CONTROL_EFFECT_MODE android.control.effectMode}</li>
   1940      * <li>{@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}</li>
   1941      * <li>{@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions}</li>
   1942      * <li>{@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions}</li>
   1943      * <li>{@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}</li>
   1944      * <li>{@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}</li>
   1945      * </ul>
   1946      * <p>Outside of android.control.*, the following controls will work:</p>
   1947      * <ul>
   1948      * <li>{@link CaptureRequest#FLASH_MODE android.flash.mode} (automatic flash for still capture will not work since aeMode is ON)</li>
   1949      * <li>{@link CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE android.lens.opticalStabilizationMode} (if it is supported)</li>
   1950      * <li>{@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}</li>
   1951      * <li>{@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode}</li>
   1952      * </ul>
   1953      * <p>For high speed recording use case, the actual maximum supported frame rate may
   1954      * be lower than what camera can output, depending on the destination Surfaces for
   1955      * the image data. For example, if the destination surface is from video encoder,
   1956      * the application need check if the video encoder is capable of supporting the
   1957      * high frame rate for a given video size, or it will end up with lower recording
   1958      * frame rate. If the destination surface is from preview window, the preview frame
   1959      * rate will be bounded by the screen refresh rate.</p>
   1960      * <p>The camera device will only support up to 2 output high speed streams
   1961      * (processed non-stalling format defined in android.request.maxNumOutputStreams)
   1962      * in this mode. This control will be effective only if all of below conditions are true:</p>
   1963      * <ul>
   1964      * <li>The application created no more than maxNumHighSpeedStreams processed non-stalling
   1965      * format output streams, where maxNumHighSpeedStreams is calculated as
   1966      * min(2, android.request.maxNumOutputStreams[Processed (but not-stalling)]).</li>
   1967      * <li>The stream sizes are selected from the sizes reported by
   1968      * android.control.availableHighSpeedVideoConfigurations.</li>
   1969      * <li>No processed non-stalling or raw streams are configured.</li>
   1970      * </ul>
   1971      * <p>When above conditions are NOT satistied, the controls of this mode and
   1972      * {@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange} will be ignored by the camera device,
   1973      * the camera device will fall back to {@link CaptureRequest#CONTROL_MODE android.control.mode} <code>==</code> AUTO,
   1974      * and the returned capture result metadata will give the fps range choosen
   1975      * by the camera device.</p>
   1976      * <p>Switching into or out of this mode may trigger some camera ISP/sensor
   1977      * reconfigurations, which may introduce extra latency. It is recommended that
   1978      * the application avoids unnecessary scene mode switch as much as possible.</p>
   1979      *
   1980      * @see CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION
   1981      * @see CaptureRequest#CONTROL_AE_LOCK
   1982      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   1983      * @see CaptureRequest#CONTROL_AE_REGIONS
   1984      * @see CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE
   1985      * @see CaptureRequest#CONTROL_AF_REGIONS
   1986      * @see CaptureRequest#CONTROL_AF_TRIGGER
   1987      * @see CaptureRequest#CONTROL_AWB_LOCK
   1988      * @see CaptureRequest#CONTROL_AWB_REGIONS
   1989      * @see CaptureRequest#CONTROL_EFFECT_MODE
   1990      * @see CaptureRequest#CONTROL_MODE
   1991      * @see CaptureRequest#FLASH_MODE
   1992      * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
   1993      * @see CaptureRequest#SCALER_CROP_REGION
   1994      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
   1995      * @see CaptureRequest#CONTROL_SCENE_MODE
   1996      * @deprecated Please refer to this API documentation to find the alternatives
   1997      */
   1998     public static final int CONTROL_SCENE_MODE_HIGH_SPEED_VIDEO = 17;
   1999 
   2000     /**
   2001      * <p>Turn on a device-specific high dynamic range (HDR) mode.</p>
   2002      * <p>In this scene mode, the camera device captures images
   2003      * that keep a larger range of scene illumination levels
   2004      * visible in the final image. For example, when taking a
   2005      * picture of a object in front of a bright window, both
   2006      * the object and the scene through the window may be
   2007      * visible when using HDR mode, while in normal AUTO mode,
   2008      * one or the other may be poorly exposed. As a tradeoff,
   2009      * HDR mode generally takes much longer to capture a single
   2010      * image, has no user control, and may have other artifacts
   2011      * depending on the HDR method used.</p>
   2012      * <p>Therefore, HDR captures operate at a much slower rate
   2013      * than regular captures.</p>
   2014      * <p>In this mode, on LIMITED or FULL devices, when a request
   2015      * is made with a {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} of
   2016      * STILL_CAPTURE, the camera device will capture an image
   2017      * using a high dynamic range capture technique.  On LEGACY
   2018      * devices, captures that target a JPEG-format output will
   2019      * be captured with HDR, and the capture intent is not
   2020      * relevant.</p>
   2021      * <p>The HDR capture may involve the device capturing a burst
   2022      * of images internally and combining them into one, or it
   2023      * may involve the device using specialized high dynamic
   2024      * range capture hardware. In all cases, a single image is
   2025      * produced in response to a capture request submitted
   2026      * while in HDR mode.</p>
   2027      * <p>Since substantial post-processing is generally needed to
   2028      * produce an HDR image, only YUV, PRIVATE, and JPEG
   2029      * outputs are supported for LIMITED/FULL device HDR
   2030      * captures, and only JPEG outputs are supported for LEGACY
   2031      * HDR captures. Using a RAW output for HDR capture is not
   2032      * supported.</p>
   2033      * <p>Some devices may also support always-on HDR, which
   2034      * applies HDR processing at full frame rate.  For these
   2035      * devices, intents other than STILL_CAPTURE will also
   2036      * produce an HDR output with no frame rate impact compared
   2037      * to normal operation, though the quality may be lower
   2038      * than for STILL_CAPTURE intents.</p>
   2039      * <p>If SCENE_MODE_HDR is used with unsupported output types
   2040      * or capture intents, the images captured will be as if
   2041      * the SCENE_MODE was not enabled at all.</p>
   2042      *
   2043      * @see CaptureRequest#CONTROL_CAPTURE_INTENT
   2044      * @see CaptureRequest#CONTROL_SCENE_MODE
   2045      */
   2046     public static final int CONTROL_SCENE_MODE_HDR = 18;
   2047 
   2048     /**
   2049      * <p>Same as FACE_PRIORITY scene mode, except that the camera
   2050      * device will choose higher sensitivity values ({@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity})
   2051      * under low light conditions.</p>
   2052      * <p>The camera device may be tuned to expose the images in a reduced
   2053      * sensitivity range to produce the best quality images. For example,
   2054      * if the {@link CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE android.sensor.info.sensitivityRange} gives range of [100, 1600],
   2055      * the camera device auto-exposure routine tuning process may limit the actual
   2056      * exposure sensitivity range to [100, 1200] to ensure that the noise level isn't
   2057      * exessive in order to preserve the image quality. Under this situation, the image under
   2058      * low light may be under-exposed when the sensor max exposure time (bounded by the
   2059      * {@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange} when {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is one of the
   2060      * ON_* modes) and effective max sensitivity are reached. This scene mode allows the
   2061      * camera device auto-exposure routine to increase the sensitivity up to the max
   2062      * sensitivity specified by {@link CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE android.sensor.info.sensitivityRange} when the scene is too
   2063      * dark and the max exposure time is reached. The captured images may be noisier
   2064      * compared with the images captured in normal FACE_PRIORITY mode; therefore, it is
   2065      * recommended that the application only use this scene mode when it is capable of
   2066      * reducing the noise level of the captured images.</p>
   2067      * <p>Unlike the other scene modes, {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode},
   2068      * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, and {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}
   2069      * remain active when FACE_PRIORITY_LOW_LIGHT is set.</p>
   2070      *
   2071      * @see CaptureRequest#CONTROL_AE_MODE
   2072      * @see CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE
   2073      * @see CaptureRequest#CONTROL_AF_MODE
   2074      * @see CaptureRequest#CONTROL_AWB_MODE
   2075      * @see CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE
   2076      * @see CaptureRequest#SENSOR_SENSITIVITY
   2077      * @see CaptureRequest#CONTROL_SCENE_MODE
   2078      * @hide
   2079      */
   2080     public static final int CONTROL_SCENE_MODE_FACE_PRIORITY_LOW_LIGHT = 19;
   2081 
   2082     /**
   2083      * <p>Scene mode values within the range of
   2084      * <code>[DEVICE_CUSTOM_START, DEVICE_CUSTOM_END]</code> are reserved for device specific
   2085      * customized scene modes.</p>
   2086      * @see CaptureRequest#CONTROL_SCENE_MODE
   2087      * @hide
   2088      */
   2089     public static final int CONTROL_SCENE_MODE_DEVICE_CUSTOM_START = 100;
   2090 
   2091     /**
   2092      * <p>Scene mode values within the range of
   2093      * <code>[DEVICE_CUSTOM_START, DEVICE_CUSTOM_END]</code> are reserved for device specific
   2094      * customized scene modes.</p>
   2095      * @see CaptureRequest#CONTROL_SCENE_MODE
   2096      * @hide
   2097      */
   2098     public static final int CONTROL_SCENE_MODE_DEVICE_CUSTOM_END = 127;
   2099 
   2100     //
   2101     // Enumeration values for CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE
   2102     //
   2103 
   2104     /**
   2105      * <p>Video stabilization is disabled.</p>
   2106      * @see CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE
   2107      */
   2108     public static final int CONTROL_VIDEO_STABILIZATION_MODE_OFF = 0;
   2109 
   2110     /**
   2111      * <p>Video stabilization is enabled.</p>
   2112      * @see CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE
   2113      */
   2114     public static final int CONTROL_VIDEO_STABILIZATION_MODE_ON = 1;
   2115 
   2116     //
   2117     // Enumeration values for CaptureRequest#EDGE_MODE
   2118     //
   2119 
   2120     /**
   2121      * <p>No edge enhancement is applied.</p>
   2122      * @see CaptureRequest#EDGE_MODE
   2123      */
   2124     public static final int EDGE_MODE_OFF = 0;
   2125 
   2126     /**
   2127      * <p>Apply edge enhancement at a quality level that does not slow down frame rate
   2128      * relative to sensor output. It may be the same as OFF if edge enhancement will
   2129      * slow down frame rate relative to sensor.</p>
   2130      * @see CaptureRequest#EDGE_MODE
   2131      */
   2132     public static final int EDGE_MODE_FAST = 1;
   2133 
   2134     /**
   2135      * <p>Apply high-quality edge enhancement, at a cost of possibly reduced output frame rate.</p>
   2136      * @see CaptureRequest#EDGE_MODE
   2137      */
   2138     public static final int EDGE_MODE_HIGH_QUALITY = 2;
   2139 
   2140     /**
   2141      * <p>Edge enhancement is applied at different levels for different output streams,
   2142      * based on resolution. Streams at maximum recording resolution (see {@link android.hardware.camera2.CameraDevice#createCaptureSession }) or below have
   2143      * edge enhancement applied, while higher-resolution streams have no edge enhancement
   2144      * applied. The level of edge enhancement for low-resolution streams is tuned so that
   2145      * frame rate is not impacted, and the quality is equal to or better than FAST (since it
   2146      * is only applied to lower-resolution outputs, quality may improve from FAST).</p>
   2147      * <p>This mode is intended to be used by applications operating in a zero-shutter-lag mode
   2148      * with YUV or PRIVATE reprocessing, where the application continuously captures
   2149      * high-resolution intermediate buffers into a circular buffer, from which a final image is
   2150      * produced via reprocessing when a user takes a picture.  For such a use case, the
   2151      * high-resolution buffers must not have edge enhancement applied to maximize efficiency of
   2152      * preview and to avoid double-applying enhancement when reprocessed, while low-resolution
   2153      * buffers (used for recording or preview, generally) need edge enhancement applied for
   2154      * reasonable preview quality.</p>
   2155      * <p>This mode is guaranteed to be supported by devices that support either the
   2156      * YUV_REPROCESSING or PRIVATE_REPROCESSING capabilities
   2157      * ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} lists either of those capabilities) and it will
   2158      * be the default mode for CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.</p>
   2159      *
   2160      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
   2161      * @see CaptureRequest#EDGE_MODE
   2162      */
   2163     public static final int EDGE_MODE_ZERO_SHUTTER_LAG = 3;
   2164 
   2165     //
   2166     // Enumeration values for CaptureRequest#FLASH_MODE
   2167     //
   2168 
   2169     /**
   2170      * <p>Do not fire the flash for this capture.</p>
   2171      * @see CaptureRequest#FLASH_MODE
   2172      */
   2173     public static final int FLASH_MODE_OFF = 0;
   2174 
   2175     /**
   2176      * <p>If the flash is available and charged, fire flash
   2177      * for this capture.</p>
   2178      * @see CaptureRequest#FLASH_MODE
   2179      */
   2180     public static final int FLASH_MODE_SINGLE = 1;
   2181 
   2182     /**
   2183      * <p>Transition flash to continuously on.</p>
   2184      * @see CaptureRequest#FLASH_MODE
   2185      */
   2186     public static final int FLASH_MODE_TORCH = 2;
   2187 
   2188     //
   2189     // Enumeration values for CaptureRequest#HOT_PIXEL_MODE
   2190     //
   2191 
   2192     /**
   2193      * <p>No hot pixel correction is applied.</p>
   2194      * <p>The frame rate must not be reduced relative to sensor raw output
   2195      * for this option.</p>
   2196      * <p>The hotpixel map may be returned in {@link CaptureResult#STATISTICS_HOT_PIXEL_MAP android.statistics.hotPixelMap}.</p>
   2197      *
   2198      * @see CaptureResult#STATISTICS_HOT_PIXEL_MAP
   2199      * @see CaptureRequest#HOT_PIXEL_MODE
   2200      */
   2201     public static final int HOT_PIXEL_MODE_OFF = 0;
   2202 
   2203     /**
   2204      * <p>Hot pixel correction is applied, without reducing frame
   2205      * rate relative to sensor raw output.</p>
   2206      * <p>The hotpixel map may be returned in {@link CaptureResult#STATISTICS_HOT_PIXEL_MAP android.statistics.hotPixelMap}.</p>
   2207      *
   2208      * @see CaptureResult#STATISTICS_HOT_PIXEL_MAP
   2209      * @see CaptureRequest#HOT_PIXEL_MODE
   2210      */
   2211     public static final int HOT_PIXEL_MODE_FAST = 1;
   2212 
   2213     /**
   2214      * <p>High-quality hot pixel correction is applied, at a cost
   2215      * of possibly reduced frame rate relative to sensor raw output.</p>
   2216      * <p>The hotpixel map may be returned in {@link CaptureResult#STATISTICS_HOT_PIXEL_MAP android.statistics.hotPixelMap}.</p>
   2217      *
   2218      * @see CaptureResult#STATISTICS_HOT_PIXEL_MAP
   2219      * @see CaptureRequest#HOT_PIXEL_MODE
   2220      */
   2221     public static final int HOT_PIXEL_MODE_HIGH_QUALITY = 2;
   2222 
   2223     //
   2224     // Enumeration values for CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
   2225     //
   2226 
   2227     /**
   2228      * <p>Optical stabilization is unavailable.</p>
   2229      * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
   2230      */
   2231     public static final int LENS_OPTICAL_STABILIZATION_MODE_OFF = 0;
   2232 
   2233     /**
   2234      * <p>Optical stabilization is enabled.</p>
   2235      * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
   2236      */
   2237     public static final int LENS_OPTICAL_STABILIZATION_MODE_ON = 1;
   2238 
   2239     //
   2240     // Enumeration values for CaptureRequest#NOISE_REDUCTION_MODE
   2241     //
   2242 
   2243     /**
   2244      * <p>No noise reduction is applied.</p>
   2245      * @see CaptureRequest#NOISE_REDUCTION_MODE
   2246      */
   2247     public static final int NOISE_REDUCTION_MODE_OFF = 0;
   2248 
   2249     /**
   2250      * <p>Noise reduction is applied without reducing frame rate relative to sensor
   2251      * output. It may be the same as OFF if noise reduction will reduce frame rate
   2252      * relative to sensor.</p>
   2253      * @see CaptureRequest#NOISE_REDUCTION_MODE
   2254      */
   2255     public static final int NOISE_REDUCTION_MODE_FAST = 1;
   2256 
   2257     /**
   2258      * <p>High-quality noise reduction is applied, at the cost of possibly reduced frame
   2259      * rate relative to sensor output.</p>
   2260      * @see CaptureRequest#NOISE_REDUCTION_MODE
   2261      */
   2262     public static final int NOISE_REDUCTION_MODE_HIGH_QUALITY = 2;
   2263 
   2264     /**
   2265      * <p>MINIMAL noise reduction is applied without reducing frame rate relative to
   2266      * sensor output. </p>
   2267      * @see CaptureRequest#NOISE_REDUCTION_MODE
   2268      */
   2269     public static final int NOISE_REDUCTION_MODE_MINIMAL = 3;
   2270 
   2271     /**
   2272      * <p>Noise reduction is applied at different levels for different output streams,
   2273      * based on resolution. Streams at maximum recording resolution (see {@link android.hardware.camera2.CameraDevice#createCaptureSession }) or below have noise
   2274      * reduction applied, while higher-resolution streams have MINIMAL (if supported) or no
   2275      * noise reduction applied (if MINIMAL is not supported.) The degree of noise reduction
   2276      * for low-resolution streams is tuned so that frame rate is not impacted, and the quality
   2277      * is equal to or better than FAST (since it is only applied to lower-resolution outputs,
   2278      * quality may improve from FAST).</p>
   2279      * <p>This mode is intended to be used by applications operating in a zero-shutter-lag mode
   2280      * with YUV or PRIVATE reprocessing, where the application continuously captures
   2281      * high-resolution intermediate buffers into a circular buffer, from which a final image is
   2282      * produced via reprocessing when a user takes a picture.  For such a use case, the
   2283      * high-resolution buffers must not have noise reduction applied to maximize efficiency of
   2284      * preview and to avoid over-applying noise filtering when reprocessing, while
   2285      * low-resolution buffers (used for recording or preview, generally) need noise reduction
   2286      * applied for reasonable preview quality.</p>
   2287      * <p>This mode is guaranteed to be supported by devices that support either the
   2288      * YUV_REPROCESSING or PRIVATE_REPROCESSING capabilities
   2289      * ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} lists either of those capabilities) and it will
   2290      * be the default mode for CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.</p>
   2291      *
   2292      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
   2293      * @see CaptureRequest#NOISE_REDUCTION_MODE
   2294      */
   2295     public static final int NOISE_REDUCTION_MODE_ZERO_SHUTTER_LAG = 4;
   2296 
   2297     //
   2298     // Enumeration values for CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2299     //
   2300 
   2301     /**
   2302      * <p>No test pattern mode is used, and the camera
   2303      * device returns captures from the image sensor.</p>
   2304      * <p>This is the default if the key is not set.</p>
   2305      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2306      */
   2307     public static final int SENSOR_TEST_PATTERN_MODE_OFF = 0;
   2308 
   2309     /**
   2310      * <p>Each pixel in <code>[R, G_even, G_odd, B]</code> is replaced by its
   2311      * respective color channel provided in
   2312      * {@link CaptureRequest#SENSOR_TEST_PATTERN_DATA android.sensor.testPatternData}.</p>
   2313      * <p>For example:</p>
   2314      * <pre><code>android.testPatternData = [0, 0xFFFFFFFF, 0xFFFFFFFF, 0]
   2315      * </code></pre>
   2316      * <p>All green pixels are 100% green. All red/blue pixels are black.</p>
   2317      * <pre><code>android.testPatternData = [0xFFFFFFFF, 0, 0xFFFFFFFF, 0]
   2318      * </code></pre>
   2319      * <p>All red pixels are 100% red. Only the odd green pixels
   2320      * are 100% green. All blue pixels are 100% black.</p>
   2321      *
   2322      * @see CaptureRequest#SENSOR_TEST_PATTERN_DATA
   2323      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2324      */
   2325     public static final int SENSOR_TEST_PATTERN_MODE_SOLID_COLOR = 1;
   2326 
   2327     /**
   2328      * <p>All pixel data is replaced with an 8-bar color pattern.</p>
   2329      * <p>The vertical bars (left-to-right) are as follows:</p>
   2330      * <ul>
   2331      * <li>100% white</li>
   2332      * <li>yellow</li>
   2333      * <li>cyan</li>
   2334      * <li>green</li>
   2335      * <li>magenta</li>
   2336      * <li>red</li>
   2337      * <li>blue</li>
   2338      * <li>black</li>
   2339      * </ul>
   2340      * <p>In general the image would look like the following:</p>
   2341      * <pre><code>W Y C G M R B K
   2342      * W Y C G M R B K
   2343      * W Y C G M R B K
   2344      * W Y C G M R B K
   2345      * W Y C G M R B K
   2346      * . . . . . . . .
   2347      * . . . . . . . .
   2348      * . . . . . . . .
   2349      *
   2350      * (B = Blue, K = Black)
   2351      * </code></pre>
   2352      * <p>Each bar should take up 1/8 of the sensor pixel array width.
   2353      * When this is not possible, the bar size should be rounded
   2354      * down to the nearest integer and the pattern can repeat
   2355      * on the right side.</p>
   2356      * <p>Each bar's height must always take up the full sensor
   2357      * pixel array height.</p>
   2358      * <p>Each pixel in this test pattern must be set to either
   2359      * 0% intensity or 100% intensity.</p>
   2360      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2361      */
   2362     public static final int SENSOR_TEST_PATTERN_MODE_COLOR_BARS = 2;
   2363 
   2364     /**
   2365      * <p>The test pattern is similar to COLOR_BARS, except that
   2366      * each bar should start at its specified color at the top,
   2367      * and fade to gray at the bottom.</p>
   2368      * <p>Furthermore each bar is further subdivided into a left and
   2369      * right half. The left half should have a smooth gradient,
   2370      * and the right half should have a quantized gradient.</p>
   2371      * <p>In particular, the right half's should consist of blocks of the
   2372      * same color for 1/16th active sensor pixel array width.</p>
   2373      * <p>The least significant bits in the quantized gradient should
   2374      * be copied from the most significant bits of the smooth gradient.</p>
   2375      * <p>The height of each bar should always be a multiple of 128.
   2376      * When this is not the case, the pattern should repeat at the bottom
   2377      * of the image.</p>
   2378      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2379      */
   2380     public static final int SENSOR_TEST_PATTERN_MODE_COLOR_BARS_FADE_TO_GRAY = 3;
   2381 
   2382     /**
   2383      * <p>All pixel data is replaced by a pseudo-random sequence
   2384      * generated from a PN9 512-bit sequence (typically implemented
   2385      * in hardware with a linear feedback shift register).</p>
   2386      * <p>The generator should be reset at the beginning of each frame,
   2387      * and thus each subsequent raw frame with this test pattern should
   2388      * be exactly the same as the last.</p>
   2389      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2390      */
   2391     public static final int SENSOR_TEST_PATTERN_MODE_PN9 = 4;
   2392 
   2393     /**
   2394      * <p>The first custom test pattern. All custom patterns that are
   2395      * available only on this camera device are at least this numeric
   2396      * value.</p>
   2397      * <p>All of the custom test patterns will be static
   2398      * (that is the raw image must not vary from frame to frame).</p>
   2399      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
   2400      */
   2401     public static final int SENSOR_TEST_PATTERN_MODE_CUSTOM1 = 256;
   2402 
   2403     //
   2404     // Enumeration values for CaptureRequest#SHADING_MODE
   2405     //
   2406 
   2407     /**
   2408      * <p>No lens shading correction is applied.</p>
   2409      * @see CaptureRequest#SHADING_MODE
   2410      */
   2411     public static final int SHADING_MODE_OFF = 0;
   2412 
   2413     /**
   2414      * <p>Apply lens shading corrections, without slowing
   2415      * frame rate relative to sensor raw output</p>
   2416      * @see CaptureRequest#SHADING_MODE
   2417      */
   2418     public static final int SHADING_MODE_FAST = 1;
   2419 
   2420     /**
   2421      * <p>Apply high-quality lens shading correction, at the
   2422      * cost of possibly reduced frame rate.</p>
   2423      * @see CaptureRequest#SHADING_MODE
   2424      */
   2425     public static final int SHADING_MODE_HIGH_QUALITY = 2;
   2426 
   2427     //
   2428     // Enumeration values for CaptureRequest#STATISTICS_FACE_DETECT_MODE
   2429     //
   2430 
   2431     /**
   2432      * <p>Do not include face detection statistics in capture
   2433      * results.</p>
   2434      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
   2435      */
   2436     public static final int STATISTICS_FACE_DETECT_MODE_OFF = 0;
   2437 
   2438     /**
   2439      * <p>Return face rectangle and confidence values only.</p>
   2440      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
   2441      */
   2442     public static final int STATISTICS_FACE_DETECT_MODE_SIMPLE = 1;
   2443 
   2444     /**
   2445      * <p>Return all face
   2446      * metadata.</p>
   2447      * <p>In this mode, face rectangles, scores, landmarks, and face IDs are all valid.</p>
   2448      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
   2449      */
   2450     public static final int STATISTICS_FACE_DETECT_MODE_FULL = 2;
   2451 
   2452     //
   2453     // Enumeration values for CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
   2454     //
   2455 
   2456     /**
   2457      * <p>Do not include a lens shading map in the capture result.</p>
   2458      * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
   2459      */
   2460     public static final int STATISTICS_LENS_SHADING_MAP_MODE_OFF = 0;
   2461 
   2462     /**
   2463      * <p>Include a lens shading map in the capture result.</p>
   2464      * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
   2465      */
   2466     public static final int STATISTICS_LENS_SHADING_MAP_MODE_ON = 1;
   2467 
   2468     //
   2469     // Enumeration values for CaptureRequest#TONEMAP_MODE
   2470     //
   2471 
   2472     /**
   2473      * <p>Use the tone mapping curve specified in
   2474      * the {@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}* entries.</p>
   2475      * <p>All color enhancement and tonemapping must be disabled, except
   2476      * for applying the tonemapping curve specified by
   2477      * {@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}.</p>
   2478      * <p>Must not slow down frame rate relative to raw
   2479      * sensor output.</p>
   2480      *
   2481      * @see CaptureRequest#TONEMAP_CURVE
   2482      * @see CaptureRequest#TONEMAP_MODE
   2483      */
   2484     public static final int TONEMAP_MODE_CONTRAST_CURVE = 0;
   2485 
   2486     /**
   2487      * <p>Advanced gamma mapping and color enhancement may be applied, without
   2488      * reducing frame rate compared to raw sensor output.</p>
   2489      * @see CaptureRequest#TONEMAP_MODE
   2490      */
   2491     public static final int TONEMAP_MODE_FAST = 1;
   2492 
   2493     /**
   2494      * <p>High-quality gamma mapping and color enhancement will be applied, at
   2495      * the cost of possibly reduced frame rate compared to raw sensor output.</p>
   2496      * @see CaptureRequest#TONEMAP_MODE
   2497      */
   2498     public static final int TONEMAP_MODE_HIGH_QUALITY = 2;
   2499 
   2500     /**
   2501      * <p>Use the gamma value specified in {@link CaptureRequest#TONEMAP_GAMMA android.tonemap.gamma} to peform
   2502      * tonemapping.</p>
   2503      * <p>All color enhancement and tonemapping must be disabled, except
   2504      * for applying the tonemapping curve specified by {@link CaptureRequest#TONEMAP_GAMMA android.tonemap.gamma}.</p>
   2505      * <p>Must not slow down frame rate relative to raw sensor output.</p>
   2506      *
   2507      * @see CaptureRequest#TONEMAP_GAMMA
   2508      * @see CaptureRequest#TONEMAP_MODE
   2509      */
   2510     public static final int TONEMAP_MODE_GAMMA_VALUE = 3;
   2511 
   2512     /**
   2513      * <p>Use the preset tonemapping curve specified in
   2514      * {@link CaptureRequest#TONEMAP_PRESET_CURVE android.tonemap.presetCurve} to peform tonemapping.</p>
   2515      * <p>All color enhancement and tonemapping must be disabled, except
   2516      * for applying the tonemapping curve specified by
   2517      * {@link CaptureRequest#TONEMAP_PRESET_CURVE android.tonemap.presetCurve}.</p>
   2518      * <p>Must not slow down frame rate relative to raw sensor output.</p>
   2519      *
   2520      * @see CaptureRequest#TONEMAP_PRESET_CURVE
   2521      * @see CaptureRequest#TONEMAP_MODE
   2522      */
   2523     public static final int TONEMAP_MODE_PRESET_CURVE = 4;
   2524 
   2525     //
   2526     // Enumeration values for CaptureRequest#TONEMAP_PRESET_CURVE
   2527     //
   2528 
   2529     /**
   2530      * <p>Tonemapping curve is defined by sRGB</p>
   2531      * @see CaptureRequest#TONEMAP_PRESET_CURVE
   2532      */
   2533     public static final int TONEMAP_PRESET_CURVE_SRGB = 0;
   2534 
   2535     /**
   2536      * <p>Tonemapping curve is defined by ITU-R BT.709</p>
   2537      * @see CaptureRequest#TONEMAP_PRESET_CURVE
   2538      */
   2539     public static final int TONEMAP_PRESET_CURVE_REC709 = 1;
   2540 
   2541     //
   2542     // Enumeration values for CaptureResult#CONTROL_AE_STATE
   2543     //
   2544 
   2545     /**
   2546      * <p>AE is off or recently reset.</p>
   2547      * <p>When a camera device is opened, it starts in
   2548      * this state. This is a transient state, the camera device may skip reporting
   2549      * this state in capture result.</p>
   2550      * @see CaptureResult#CONTROL_AE_STATE
   2551      */
   2552     public static final int CONTROL_AE_STATE_INACTIVE = 0;
   2553 
   2554     /**
   2555      * <p>AE doesn't yet have a good set of control values
   2556      * for the current scene.</p>
   2557      * <p>This is a transient state, the camera device may skip
   2558      * reporting this state in capture result.</p>
   2559      * @see CaptureResult#CONTROL_AE_STATE
   2560      */
   2561     public static final int CONTROL_AE_STATE_SEARCHING = 1;
   2562 
   2563     /**
   2564      * <p>AE has a good set of control values for the
   2565      * current scene.</p>
   2566      * @see CaptureResult#CONTROL_AE_STATE
   2567      */
   2568     public static final int CONTROL_AE_STATE_CONVERGED = 2;
   2569 
   2570     /**
   2571      * <p>AE has been locked.</p>
   2572      * @see CaptureResult#CONTROL_AE_STATE
   2573      */
   2574     public static final int CONTROL_AE_STATE_LOCKED = 3;
   2575 
   2576     /**
   2577      * <p>AE has a good set of control values, but flash
   2578      * needs to be fired for good quality still
   2579      * capture.</p>
   2580      * @see CaptureResult#CONTROL_AE_STATE
   2581      */
   2582     public static final int CONTROL_AE_STATE_FLASH_REQUIRED = 4;
   2583 
   2584     /**
   2585      * <p>AE has been asked to do a precapture sequence
   2586      * and is currently executing it.</p>
   2587      * <p>Precapture can be triggered through setting
   2588      * {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} to START. Currently
   2589      * active and completed (if it causes camera device internal AE lock) precapture
   2590      * metering sequence can be canceled through setting
   2591      * {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} to CANCEL.</p>
   2592      * <p>Once PRECAPTURE completes, AE will transition to CONVERGED
   2593      * or FLASH_REQUIRED as appropriate. This is a transient
   2594      * state, the camera device may skip reporting this state in
   2595      * capture result.</p>
   2596      *
   2597      * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER
   2598      * @see CaptureResult#CONTROL_AE_STATE
   2599      */
   2600     public static final int CONTROL_AE_STATE_PRECAPTURE = 5;
   2601 
   2602     //
   2603     // Enumeration values for CaptureResult#CONTROL_AF_STATE
   2604     //
   2605 
   2606     /**
   2607      * <p>AF is off or has not yet tried to scan/been asked
   2608      * to scan.</p>
   2609      * <p>When a camera device is opened, it starts in this
   2610      * state. This is a transient state, the camera device may
   2611      * skip reporting this state in capture
   2612      * result.</p>
   2613      * @see CaptureResult#CONTROL_AF_STATE
   2614      */
   2615     public static final int CONTROL_AF_STATE_INACTIVE = 0;
   2616 
   2617     /**
   2618      * <p>AF is currently performing an AF scan initiated the
   2619      * camera device in a continuous autofocus mode.</p>
   2620      * <p>Only used by CONTINUOUS_* AF modes. This is a transient
   2621      * state, the camera device may skip reporting this state in
   2622      * capture result.</p>
   2623      * @see CaptureResult#CONTROL_AF_STATE
   2624      */
   2625     public static final int CONTROL_AF_STATE_PASSIVE_SCAN = 1;
   2626 
   2627     /**
   2628      * <p>AF currently believes it is in focus, but may
   2629      * restart scanning at any time.</p>
   2630      * <p>Only used by CONTINUOUS_* AF modes. This is a transient
   2631      * state, the camera device may skip reporting this state in
   2632      * capture result.</p>
   2633      * @see CaptureResult#CONTROL_AF_STATE
   2634      */
   2635     public static final int CONTROL_AF_STATE_PASSIVE_FOCUSED = 2;
   2636 
   2637     /**
   2638      * <p>AF is performing an AF scan because it was
   2639      * triggered by AF trigger.</p>
   2640      * <p>Only used by AUTO or MACRO AF modes. This is a transient
   2641      * state, the camera device may skip reporting this state in
   2642      * capture result.</p>
   2643      * @see CaptureResult#CONTROL_AF_STATE
   2644      */
   2645     public static final int CONTROL_AF_STATE_ACTIVE_SCAN = 3;
   2646 
   2647     /**
   2648      * <p>AF believes it is focused correctly and has locked
   2649      * focus.</p>
   2650      * <p>This state is reached only after an explicit START AF trigger has been
   2651      * sent ({@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}), when good focus has been obtained.</p>
   2652      * <p>The lens will remain stationary until the AF mode ({@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}) is changed or
   2653      * a new AF trigger is sent to the camera device ({@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}).</p>
   2654      *
   2655      * @see CaptureRequest#CONTROL_AF_MODE
   2656      * @see CaptureRequest#CONTROL_AF_TRIGGER
   2657      * @see CaptureResult#CONTROL_AF_STATE
   2658      */
   2659     public static final int CONTROL_AF_STATE_FOCUSED_LOCKED = 4;
   2660 
   2661     /**
   2662      * <p>AF has failed to focus successfully and has locked
   2663      * focus.</p>
   2664      * <p>This state is reached only after an explicit START AF trigger has been
   2665      * sent ({@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}), when good focus cannot be obtained.</p>
   2666      * <p>The lens will remain stationary until the AF mode ({@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}) is changed or
   2667      * a new AF trigger is sent to the camera device ({@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger}).</p>
   2668      *
   2669      * @see CaptureRequest#CONTROL_AF_MODE
   2670      * @see CaptureRequest#CONTROL_AF_TRIGGER
   2671      * @see CaptureResult#CONTROL_AF_STATE
   2672      */
   2673     public static final int CONTROL_AF_STATE_NOT_FOCUSED_LOCKED = 5;
   2674 
   2675     /**
   2676      * <p>AF finished a passive scan without finding focus,
   2677      * and may restart scanning at any time.</p>
   2678      * <p>Only used by CONTINUOUS_* AF modes. This is a transient state, the camera
   2679      * device may skip reporting this state in capture result.</p>
   2680      * <p>LEGACY camera devices do not support this state. When a passive
   2681      * scan has finished, it will always go to PASSIVE_FOCUSED.</p>
   2682      * @see CaptureResult#CONTROL_AF_STATE
   2683      */
   2684     public static final int CONTROL_AF_STATE_PASSIVE_UNFOCUSED = 6;
   2685 
   2686     //
   2687     // Enumeration values for CaptureResult#CONTROL_AWB_STATE
   2688     //
   2689 
   2690     /**
   2691      * <p>AWB is not in auto mode, or has not yet started metering.</p>
   2692      * <p>When a camera device is opened, it starts in this
   2693      * state. This is a transient state, the camera device may
   2694      * skip reporting this state in capture
   2695      * result.</p>
   2696      * @see CaptureResult#CONTROL_AWB_STATE
   2697      */
   2698     public static final int CONTROL_AWB_STATE_INACTIVE = 0;
   2699 
   2700     /**
   2701      * <p>AWB doesn't yet have a good set of control
   2702      * values for the current scene.</p>
   2703      * <p>This is a transient state, the camera device
   2704      * may skip reporting this state in capture result.</p>
   2705      * @see CaptureResult#CONTROL_AWB_STATE
   2706      */
   2707     public static final int CONTROL_AWB_STATE_SEARCHING = 1;
   2708 
   2709     /**
   2710      * <p>AWB has a good set of control values for the
   2711      * current scene.</p>
   2712      * @see CaptureResult#CONTROL_AWB_STATE
   2713      */
   2714     public static final int CONTROL_AWB_STATE_CONVERGED = 2;
   2715 
   2716     /**
   2717      * <p>AWB has been locked.</p>
   2718      * @see CaptureResult#CONTROL_AWB_STATE
   2719      */
   2720     public static final int CONTROL_AWB_STATE_LOCKED = 3;
   2721 
   2722     //
   2723     // Enumeration values for CaptureResult#FLASH_STATE
   2724     //
   2725 
   2726     /**
   2727      * <p>No flash on camera.</p>
   2728      * @see CaptureResult#FLASH_STATE
   2729      */
   2730     public static final int FLASH_STATE_UNAVAILABLE = 0;
   2731 
   2732     /**
   2733      * <p>Flash is charging and cannot be fired.</p>
   2734      * @see CaptureResult#FLASH_STATE
   2735      */
   2736     public static final int FLASH_STATE_CHARGING = 1;
   2737 
   2738     /**
   2739      * <p>Flash is ready to fire.</p>
   2740      * @see CaptureResult#FLASH_STATE
   2741      */
   2742     public static final int FLASH_STATE_READY = 2;
   2743 
   2744     /**
   2745      * <p>Flash fired for this capture.</p>
   2746      * @see CaptureResult#FLASH_STATE
   2747      */
   2748     public static final int FLASH_STATE_FIRED = 3;
   2749 
   2750     /**
   2751      * <p>Flash partially illuminated this frame.</p>
   2752      * <p>This is usually due to the next or previous frame having
   2753      * the flash fire, and the flash spilling into this capture
   2754      * due to hardware limitations.</p>
   2755      * @see CaptureResult#FLASH_STATE
   2756      */
   2757     public static final int FLASH_STATE_PARTIAL = 4;
   2758 
   2759     //
   2760     // Enumeration values for CaptureResult#LENS_STATE
   2761     //
   2762 
   2763     /**
   2764      * <p>The lens parameters ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance},
   2765      * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} and {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) are not changing.</p>
   2766      *
   2767      * @see CaptureRequest#LENS_APERTURE
   2768      * @see CaptureRequest#LENS_FILTER_DENSITY
   2769      * @see CaptureRequest#LENS_FOCAL_LENGTH
   2770      * @see CaptureRequest#LENS_FOCUS_DISTANCE
   2771      * @see CaptureResult#LENS_STATE
   2772      */
   2773     public static final int LENS_STATE_STATIONARY = 0;
   2774 
   2775     /**
   2776      * <p>One or several of the lens parameters
   2777      * ({@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance},
   2778      * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} or {@link CaptureRequest#LENS_APERTURE android.lens.aperture}) is
   2779      * currently changing.</p>
   2780      *
   2781      * @see CaptureRequest#LENS_APERTURE
   2782      * @see CaptureRequest#LENS_FILTER_DENSITY
   2783      * @see CaptureRequest#LENS_FOCAL_LENGTH
   2784      * @see CaptureRequest#LENS_FOCUS_DISTANCE
   2785      * @see CaptureResult#LENS_STATE
   2786      */
   2787     public static final int LENS_STATE_MOVING = 1;
   2788 
   2789     //
   2790     // Enumeration values for CaptureResult#STATISTICS_SCENE_FLICKER
   2791     //
   2792 
   2793     /**
   2794      * <p>The camera device does not detect any flickering illumination
   2795      * in the current scene.</p>
   2796      * @see CaptureResult#STATISTICS_SCENE_FLICKER
   2797      */
   2798     public static final int STATISTICS_SCENE_FLICKER_NONE = 0;
   2799 
   2800     /**
   2801      * <p>The camera device detects illumination flickering at 50Hz
   2802      * in the current scene.</p>
   2803      * @see CaptureResult#STATISTICS_SCENE_FLICKER
   2804      */
   2805     public static final int STATISTICS_SCENE_FLICKER_50HZ = 1;
   2806 
   2807     /**
   2808      * <p>The camera device detects illumination flickering at 60Hz
   2809      * in the current scene.</p>
   2810      * @see CaptureResult#STATISTICS_SCENE_FLICKER
   2811      */
   2812     public static final int STATISTICS_SCENE_FLICKER_60HZ = 2;
   2813 
   2814     //
   2815     // Enumeration values for CaptureResult#SYNC_FRAME_NUMBER
   2816     //
   2817 
   2818     /**
   2819      * <p>The current result is not yet fully synchronized to any request.</p>
   2820      * <p>Synchronization is in progress, and reading metadata from this
   2821      * result may include a mix of data that have taken effect since the
   2822      * last synchronization time.</p>
   2823      * <p>In some future result, within {@link CameraCharacteristics#SYNC_MAX_LATENCY android.sync.maxLatency} frames,
   2824      * this value will update to the actual frame number frame number
   2825      * the result is guaranteed to be synchronized to (as long as the
   2826      * request settings remain constant).</p>
   2827      *
   2828      * @see CameraCharacteristics#SYNC_MAX_LATENCY
   2829      * @see CaptureResult#SYNC_FRAME_NUMBER
   2830      * @hide
   2831      */
   2832     public static final int SYNC_FRAME_NUMBER_CONVERGING = -1;
   2833 
   2834     /**
   2835      * <p>The current result's synchronization status is unknown.</p>
   2836      * <p>The result may have already converged, or it may be in
   2837      * progress.  Reading from this result may include some mix
   2838      * of settings from past requests.</p>
   2839      * <p>After a settings change, the new settings will eventually all
   2840      * take effect for the output buffers and results. However, this
   2841      * value will not change when that happens. Altering settings
   2842      * rapidly may provide outcomes using mixes of settings from recent
   2843      * requests.</p>
   2844      * <p>This value is intended primarily for backwards compatibility with
   2845      * the older camera implementations (for android.hardware.Camera).</p>
   2846      * @see CaptureResult#SYNC_FRAME_NUMBER
   2847      * @hide
   2848      */
   2849     public static final int SYNC_FRAME_NUMBER_UNKNOWN = -2;
   2850 
   2851     /*~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
   2852      * End generated code
   2853      *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~O@*/
   2854 
   2855 }
   2856