/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.hardware.camera2; import android.annotation.NonNull; import android.annotation.Nullable; import android.hardware.camera2.impl.CameraMetadataNative; import android.hardware.camera2.impl.CaptureResultExtras; import android.hardware.camera2.impl.PublicKey; import android.hardware.camera2.impl.SyntheticKey; import android.hardware.camera2.utils.TypeReference; import android.util.Log; import android.util.Rational; import java.util.List; /** *

The subset of the results of a single image capture from the image sensor.

* *

Contains a subset of the final configuration for the capture hardware (sensor, lens, * flash), the processing pipeline, the control algorithms, and the output * buffers.

* *

CaptureResults are produced by a {@link CameraDevice} after processing a * {@link CaptureRequest}. All properties listed for capture requests can also * be queried on the capture result, to determine the final values used for * capture. The result also includes additional metadata about the state of the * camera device during the capture.

* *

Not all properties returned by {@link CameraCharacteristics#getAvailableCaptureResultKeys()} * are necessarily available. Some results are {@link CaptureResult partial} and will * not have every key set. Only {@link TotalCaptureResult total} results are guaranteed to have * every key available that was enabled by the request.

* *

{@link CaptureResult} objects are immutable.

* */ public class CaptureResult extends CameraMetadata> { private static final String TAG = "CaptureResult"; private static final boolean VERBOSE = false; /** * A {@code Key} is used to do capture result field lookups with * {@link CaptureResult#get}. * *

For example, to get the timestamp corresponding to the exposure of the first row: *

     * long timestamp = captureResult.get(CaptureResult.SENSOR_TIMESTAMP);
     * 
*

* *

To enumerate over all possible keys for {@link CaptureResult}, see * {@link CameraCharacteristics#getAvailableCaptureResultKeys}.

* * @see CaptureResult#get * @see CameraCharacteristics#getAvailableCaptureResultKeys */ public final static class Key { private final CameraMetadataNative.Key mKey; /** * Visible for testing and vendor extensions only. * * @hide */ public Key(String name, Class type, long vendorId) { mKey = new CameraMetadataNative.Key(name, type, vendorId); } /** * Visible for testing and vendor extensions only. * * @hide */ public Key(String name, Class type) { mKey = new CameraMetadataNative.Key(name, type); } /** * Visible for testing and vendor extensions only. * * @hide */ public Key(String name, TypeReference typeReference) { mKey = new CameraMetadataNative.Key(name, typeReference); } /** * Return a camelCase, period separated name formatted like: * {@code "root.section[.subsections].name"}. * *

Built-in keys exposed by the Android SDK are always prefixed with {@code "android."}; * keys that are device/platform-specific are prefixed with {@code "com."}.

* *

For example, {@code CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP} would * have a name of {@code "android.scaler.streamConfigurationMap"}; whereas a device * specific key might look like {@code "com.google.nexus.data.private"}.

* * @return String representation of the key name */ @NonNull public String getName() { return mKey.getName(); } /** * Return vendor tag id. * * @hide */ public long getVendorId() { return mKey.getVendorId(); } /** * {@inheritDoc} */ @Override public final int hashCode() { return mKey.hashCode(); } /** * {@inheritDoc} */ @SuppressWarnings("unchecked") @Override public final boolean equals(Object o) { return o instanceof Key && ((Key)o).mKey.equals(mKey); } /** * Return this {@link Key} as a string representation. * *

{@code "CaptureResult.Key(%s)"}, where {@code %s} represents * the name of this key as returned by {@link #getName}.

* * @return string representation of {@link Key} */ @NonNull @Override public String toString() { return String.format("CaptureResult.Key(%s)", mKey.getName()); } /** * Visible for CameraMetadataNative implementation only; do not use. * * TODO: Make this private or remove it altogether. * * @hide */ public CameraMetadataNative.Key getNativeKey() { return mKey; } @SuppressWarnings({ "unchecked" }) /*package*/ Key(CameraMetadataNative.Key nativeKey) { mKey = (CameraMetadataNative.Key) nativeKey; } } private final CameraMetadataNative mResults; private final CaptureRequest mRequest; private final int mSequenceId; private final long mFrameNumber; /** * Takes ownership of the passed-in properties object * *

For internal use only

* @hide */ public CaptureResult(CameraMetadataNative results, CaptureRequest parent, CaptureResultExtras extras) { if (results == null) { throw new IllegalArgumentException("results was null"); } if (parent == null) { throw new IllegalArgumentException("parent was null"); } if (extras == null) { throw new IllegalArgumentException("extras was null"); } mResults = CameraMetadataNative.move(results); if (mResults.isEmpty()) { throw new AssertionError("Results must not be empty"); } setNativeInstance(mResults); mRequest = parent; mSequenceId = extras.getRequestId(); mFrameNumber = extras.getFrameNumber(); } /** * Returns a copy of the underlying {@link CameraMetadataNative}. * @hide */ public CameraMetadataNative getNativeCopy() { return new CameraMetadataNative(mResults); } /** * Creates a request-less result. * *

For testing only.

* @hide */ public CaptureResult(CameraMetadataNative results, int sequenceId) { if (results == null) { throw new IllegalArgumentException("results was null"); } mResults = CameraMetadataNative.move(results); if (mResults.isEmpty()) { throw new AssertionError("Results must not be empty"); } setNativeInstance(mResults); mRequest = null; mSequenceId = sequenceId; mFrameNumber = -1; } /** * Get a capture result field value. * *

The field definitions can be found in {@link CaptureResult}.

* *

Querying the value for the same key more than once will return a value * which is equal to the previous queried value.

* * @throws IllegalArgumentException if the key was not valid * * @param key The result field to read. * @return The value of that key, or {@code null} if the field is not set. */ @Nullable public T get(Key key) { T value = mResults.get(key); if (VERBOSE) Log.v(TAG, "#get for Key = " + key.getName() + ", returned value = " + value); return value; } /** * {@inheritDoc} * @hide */ @SuppressWarnings("unchecked") @Override protected T getProtected(Key key) { return (T) mResults.get(key); } /** * {@inheritDoc} * @hide */ @SuppressWarnings("unchecked") @Override protected Class> getKeyClass() { Object thisClass = Key.class; return (Class>)thisClass; } /** * Dumps the native metadata contents to logcat. * *

Visibility for testing/debugging only. The results will not * include any synthesized keys, as they are invisible to the native layer.

* * @hide */ public void dumpToLog() { mResults.dumpToLog(); } /** * {@inheritDoc} */ @Override @NonNull public List> getKeys() { // Force the javadoc for this function to show up on the CaptureResult page return super.getKeys(); } /** * Get the request associated with this result. * *

Whenever a request has been fully or partially captured, with * {@link CameraCaptureSession.CaptureCallback#onCaptureCompleted} or * {@link CameraCaptureSession.CaptureCallback#onCaptureProgressed}, the {@code result}'s * {@code getRequest()} will return that {@code request}. *

* *

For example, *

cameraDevice.capture(someRequest, new CaptureCallback() {
     *     {@literal @}Override
     *     void onCaptureCompleted(CaptureRequest myRequest, CaptureResult myResult) {
     *         assert(myResult.getRequest.equals(myRequest) == true);
     *     }
     * }, null);
     * 
*

* * @return The request associated with this result. Never {@code null}. */ @NonNull public CaptureRequest getRequest() { return mRequest; } /** * Get the frame number associated with this result. * *

Whenever a request has been processed, regardless of failure or success, * it gets a unique frame number assigned to its future result/failure.

* *

For the same type of request (capturing from the camera device or reprocessing), this * value monotonically increments, starting with 0, for every new result or failure and the * scope is the lifetime of the {@link CameraDevice}. Between different types of requests, * the frame number may not monotonically increment. For example, the frame number of a newer * reprocess result may be smaller than the frame number of an older result of capturing new * images from the camera device, but the frame number of a newer reprocess result will never be * smaller than the frame number of an older reprocess result.

* * @return The frame number * * @see CameraDevice#createCaptureRequest * @see CameraDevice#createReprocessCaptureRequest */ public long getFrameNumber() { return mFrameNumber; } /** * The sequence ID for this failure that was returned by the * {@link CameraCaptureSession#capture} family of functions. * *

The sequence ID is a unique monotonically increasing value starting from 0, * incremented every time a new group of requests is submitted to the CameraDevice.

* * @return int The ID for the sequence of requests that this capture result is a part of * * @see CameraDevice.CaptureCallback#onCaptureSequenceCompleted * @see CameraDevice.CaptureCallback#onCaptureSequenceAborted */ public int getSequenceId() { return mSequenceId; } /*@O~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~ * The key entries below this point are generated from metadata * definitions in /system/media/camera/docs. Do not modify by hand or * modify the comment blocks at the start or end. *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~*/ /** *

The mode control selects how the image data is converted from the * sensor's native color into linear sRGB color.

*

When auto-white balance (AWB) is enabled with {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, this * control is overridden by the AWB routine. When AWB is disabled, the * application controls how the color mapping is performed.

*

We define the expected processing pipeline below. For consistency * across devices, this is always the case with TRANSFORM_MATRIX.

*

When either FULL or HIGH_QUALITY is used, the camera device may * do additional processing but {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} and * {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform} will still be provided by the * camera device (in the results) and be roughly correct.

*

Switching to TRANSFORM_MATRIX and using the data provided from * FAST or HIGH_QUALITY will yield a picture with the same white point * as what was produced by the camera device in the earlier frame.

*

The expected processing pipeline is as follows:

*

White balance processing pipeline

*

The white balance is encoded by two values, a 4-channel white-balance * gain vector (applied in the Bayer domain), and a 3x3 color transform * matrix (applied after demosaic).

*

The 4-channel white-balance gains are defined as:

*
{@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} = [ R G_even G_odd B ]
     * 
*

where G_even is the gain for green pixels on even rows of the * output, and G_odd is the gain for green pixels on the odd rows. * These may be identical for a given camera device implementation; if * the camera device does not support a separate gain for even/odd green * channels, it will use the G_even value, and write G_odd equal to * G_even in the output result metadata.

*

The matrices for color transforms are defined as a 9-entry vector:

*
{@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform} = [ I0 I1 I2 I3 I4 I5 I6 I7 I8 ]
     * 
*

which define a transform from input sensor colors, P_in = [ r g b ], * to output linear sRGB, P_out = [ r' g' b' ],

*

with colors as follows:

*
r' = I0r + I1g + I2b
     * g' = I3r + I4g + I5b
     * b' = I6r + I7g + I8b
     * 
*

Both the input and output value ranges must match. Overflow/underflow * values are clipped to fit within the range.

*

Possible values: *

    *
  • {@link #COLOR_CORRECTION_MODE_TRANSFORM_MATRIX TRANSFORM_MATRIX}
  • *
  • {@link #COLOR_CORRECTION_MODE_FAST FAST}
  • *
  • {@link #COLOR_CORRECTION_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#COLOR_CORRECTION_GAINS * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM * @see CaptureRequest#CONTROL_AWB_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #COLOR_CORRECTION_MODE_TRANSFORM_MATRIX * @see #COLOR_CORRECTION_MODE_FAST * @see #COLOR_CORRECTION_MODE_HIGH_QUALITY */ @PublicKey public static final Key COLOR_CORRECTION_MODE = new Key("android.colorCorrection.mode", int.class); /** *

A color transform matrix to use to transform * from sensor RGB color space to output linear sRGB color space.

*

This matrix is either set by the camera device when the request * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} is not TRANSFORM_MATRIX, or * directly by the application in the request when the * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} is TRANSFORM_MATRIX.

*

In the latter case, the camera device may round the matrix to account * for precision issues; the final rounded matrix should be reported back * in this matrix result metadata. The transform should keep the magnitude * of the output color values within [0, 1.0] (assuming input color * values is within the normalized range [0, 1.0]), or clipping may occur.

*

The valid range of each matrix element varies on different devices, but * values within [-1.5, 3.0] are guaranteed not to be clipped.

*

Units: Unitless scale factors

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#COLOR_CORRECTION_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL */ @PublicKey public static final Key COLOR_CORRECTION_TRANSFORM = new Key("android.colorCorrection.transform", android.hardware.camera2.params.ColorSpaceTransform.class); /** *

Gains applying to Bayer raw color channels for * white-balance.

*

These per-channel gains are either set by the camera device * when the request {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} is not * TRANSFORM_MATRIX, or directly by the application in the * request when the {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} is * TRANSFORM_MATRIX.

*

The gains in the result metadata are the gains actually * applied by the camera device to the current frame.

*

The valid range of gains varies on different devices, but gains * between [1.0, 3.0] are guaranteed not to be clipped. Even if a given * device allows gains below 1.0, this is usually not recommended because * this can create color artifacts.

*

Units: Unitless gain factors

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#COLOR_CORRECTION_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL */ @PublicKey public static final Key COLOR_CORRECTION_GAINS = new Key("android.colorCorrection.gains", android.hardware.camera2.params.RggbChannelVector.class); /** *

Mode of operation for the chromatic aberration correction algorithm.

*

Chromatic (color) aberration is caused by the fact that different wavelengths of light * can not focus on the same point after exiting from the lens. This metadata defines * the high level control of chromatic aberration correction algorithm, which aims to * minimize the chromatic artifacts that may occur along the object boundaries in an * image.

*

FAST/HIGH_QUALITY both mean that camera device determined aberration * correction will be applied. HIGH_QUALITY mode indicates that the camera device will * use the highest-quality aberration correction algorithms, even if it slows down * capture rate. FAST means the camera device will not slow down capture rate when * applying aberration correction.

*

LEGACY devices will always be in FAST mode.

*

Possible values: *

    *
  • {@link #COLOR_CORRECTION_ABERRATION_MODE_OFF OFF}
  • *
  • {@link #COLOR_CORRECTION_ABERRATION_MODE_FAST FAST}
  • *
  • {@link #COLOR_CORRECTION_ABERRATION_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES android.colorCorrection.availableAberrationModes}

*

This key is available on all devices.

* * @see CameraCharacteristics#COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES * @see #COLOR_CORRECTION_ABERRATION_MODE_OFF * @see #COLOR_CORRECTION_ABERRATION_MODE_FAST * @see #COLOR_CORRECTION_ABERRATION_MODE_HIGH_QUALITY */ @PublicKey public static final Key COLOR_CORRECTION_ABERRATION_MODE = new Key("android.colorCorrection.aberrationMode", int.class); /** *

The desired setting for the camera device's auto-exposure * algorithm's antibanding compensation.

*

Some kinds of lighting fixtures, such as some fluorescent * lights, flicker at the rate of the power supply frequency * (60Hz or 50Hz, depending on country). While this is * typically not noticeable to a person, it can be visible to * a camera device. If a camera sets its exposure time to the * wrong value, the flicker may become visible in the * viewfinder as flicker or in a final captured image, as a * set of variable-brightness bands across the image.

*

Therefore, the auto-exposure routines of camera devices * include antibanding routines that ensure that the chosen * exposure value will not cause such banding. The choice of * exposure time depends on the rate of flicker, which the * camera device can detect automatically, or the expected * rate can be selected by the application using this * control.

*

A given camera device may not support all of the possible * options for the antibanding mode. The * {@link CameraCharacteristics#CONTROL_AE_AVAILABLE_ANTIBANDING_MODES android.control.aeAvailableAntibandingModes} key contains * the available modes for a given camera device.

*

AUTO mode is the default if it is available on given * camera device. When AUTO mode is not available, the * default will be either 50HZ or 60HZ, and both 50HZ * and 60HZ will be available.

*

If manual exposure control is enabled (by setting * {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} or {@link CaptureRequest#CONTROL_MODE android.control.mode} to OFF), * then this setting has no effect, and the application must * ensure it selects exposure times that do not cause banding * issues. The {@link CaptureResult#STATISTICS_SCENE_FLICKER android.statistics.sceneFlicker} key can assist * the application in this.

*

Possible values: *

    *
  • {@link #CONTROL_AE_ANTIBANDING_MODE_OFF OFF}
  • *
  • {@link #CONTROL_AE_ANTIBANDING_MODE_50HZ 50HZ}
  • *
  • {@link #CONTROL_AE_ANTIBANDING_MODE_60HZ 60HZ}
  • *
  • {@link #CONTROL_AE_ANTIBANDING_MODE_AUTO AUTO}
  • *

*

Available values for this device:

*

{@link CameraCharacteristics#CONTROL_AE_AVAILABLE_ANTIBANDING_MODES android.control.aeAvailableAntibandingModes}

*

This key is available on all devices.

* * @see CameraCharacteristics#CONTROL_AE_AVAILABLE_ANTIBANDING_MODES * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CaptureResult#STATISTICS_SCENE_FLICKER * @see #CONTROL_AE_ANTIBANDING_MODE_OFF * @see #CONTROL_AE_ANTIBANDING_MODE_50HZ * @see #CONTROL_AE_ANTIBANDING_MODE_60HZ * @see #CONTROL_AE_ANTIBANDING_MODE_AUTO */ @PublicKey public static final Key CONTROL_AE_ANTIBANDING_MODE = new Key("android.control.aeAntibandingMode", int.class); /** *

Adjustment to auto-exposure (AE) target image * brightness.

*

The adjustment is measured as a count of steps, with the * step size defined by {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP android.control.aeCompensationStep} and the * allowed range by {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_RANGE android.control.aeCompensationRange}.

*

For example, if the exposure value (EV) step is 0.333, '6' * will mean an exposure compensation of +2 EV; -3 will mean an * exposure compensation of -1 EV. One EV represents a doubling * of image brightness. Note that this control will only be * effective if {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} != OFF. This control * will take effect even when {@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} == true.

*

In the event of exposure compensation value being changed, camera device * may take several frames to reach the newly requested exposure target. * During that time, {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} field will be in the SEARCHING * state. Once the new exposure target is reached, {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} will * change from SEARCHING to either CONVERGED, LOCKED (if AE lock is enabled), or * FLASH_REQUIRED (if the scene is too dark for still capture).

*

Units: Compensation steps

*

Range of valid values:
* {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_RANGE android.control.aeCompensationRange}

*

This key is available on all devices.

* * @see CameraCharacteristics#CONTROL_AE_COMPENSATION_RANGE * @see CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP * @see CaptureRequest#CONTROL_AE_LOCK * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureResult#CONTROL_AE_STATE */ @PublicKey public static final Key CONTROL_AE_EXPOSURE_COMPENSATION = new Key("android.control.aeExposureCompensation", int.class); /** *

Whether auto-exposure (AE) is currently locked to its latest * calculated values.

*

When set to true (ON), the AE algorithm is locked to its latest parameters, * and will not change exposure settings until the lock is set to false (OFF).

*

Note that even when AE is locked, the flash may be fired if * the {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is ON_AUTO_FLASH / * ON_ALWAYS_FLASH / ON_AUTO_FLASH_REDEYE.

*

When {@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation} is changed, even if the AE lock * is ON, the camera device will still adjust its exposure value.

*

If AE precapture is triggered (see {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}) * when AE is already locked, the camera device will not change the exposure time * ({@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}) and sensitivity ({@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}) * parameters. The flash may be fired if the {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} * is ON_AUTO_FLASH/ON_AUTO_FLASH_REDEYE and the scene is too dark. If the * {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is ON_ALWAYS_FLASH, the scene may become overexposed. * Similarly, AE precapture trigger CANCEL has no effect when AE is already locked.

*

When an AE precapture sequence is triggered, AE unlock will not be able to unlock * the AE if AE is locked by the camera device internally during precapture metering * sequence In other words, submitting requests with AE unlock has no effect for an * ongoing precapture metering sequence. Otherwise, the precapture metering sequence * will never succeed in a sequence of preview requests where AE lock is always set * to false.

*

Since the camera device has a pipeline of in-flight requests, the settings that * get locked do not necessarily correspond to the settings that were present in the * latest capture result received from the camera device, since additional captures * and AE updates may have occurred even before the result was sent out. If an * application is switching between automatic and manual control and wishes to eliminate * any flicker during the switch, the following procedure is recommended:

*
    *
  1. Starting in auto-AE mode:
  2. *
  3. Lock AE
  4. *
  5. Wait for the first result to be output that has the AE locked
  6. *
  7. Copy exposure settings from that result into a request, set the request to manual AE
  8. *
  9. Submit the capture request, proceed to run manual AE as desired.
  10. *
*

See {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} for AE lock related state transition details.

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER * @see CaptureResult#CONTROL_AE_STATE * @see CaptureRequest#SENSOR_EXPOSURE_TIME * @see CaptureRequest#SENSOR_SENSITIVITY */ @PublicKey public static final Key CONTROL_AE_LOCK = new Key("android.control.aeLock", boolean.class); /** *

The desired mode for the camera device's * auto-exposure routine.

*

This control is only effective if {@link CaptureRequest#CONTROL_MODE android.control.mode} is * AUTO.

*

When set to any of the ON modes, the camera device's * auto-exposure routine is enabled, overriding the * application's selected exposure time, sensor sensitivity, * and frame duration ({@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}, * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and * {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}). If one of the FLASH modes * is selected, the camera device's flash unit controls are * also overridden.

*

The FLASH modes are only available if the camera device * has a flash unit ({@link CameraCharacteristics#FLASH_INFO_AVAILABLE android.flash.info.available} is true).

*

If flash TORCH mode is desired, this field must be set to * ON or OFF, and {@link CaptureRequest#FLASH_MODE android.flash.mode} set to TORCH.

*

When set to any of the ON modes, the values chosen by the * camera device auto-exposure routine for the overridden * fields for a given capture will be available in its * CaptureResult.

*

Possible values: *

    *
  • {@link #CONTROL_AE_MODE_OFF OFF}
  • *
  • {@link #CONTROL_AE_MODE_ON ON}
  • *
  • {@link #CONTROL_AE_MODE_ON_AUTO_FLASH ON_AUTO_FLASH}
  • *
  • {@link #CONTROL_AE_MODE_ON_ALWAYS_FLASH ON_ALWAYS_FLASH}
  • *
  • {@link #CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE ON_AUTO_FLASH_REDEYE}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AE_AVAILABLE_MODES android.control.aeAvailableModes}

*

This key is available on all devices.

* * @see CameraCharacteristics#CONTROL_AE_AVAILABLE_MODES * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#FLASH_INFO_AVAILABLE * @see CaptureRequest#FLASH_MODE * @see CaptureRequest#SENSOR_EXPOSURE_TIME * @see CaptureRequest#SENSOR_FRAME_DURATION * @see CaptureRequest#SENSOR_SENSITIVITY * @see #CONTROL_AE_MODE_OFF * @see #CONTROL_AE_MODE_ON * @see #CONTROL_AE_MODE_ON_AUTO_FLASH * @see #CONTROL_AE_MODE_ON_ALWAYS_FLASH * @see #CONTROL_AE_MODE_ON_AUTO_FLASH_REDEYE */ @PublicKey public static final Key CONTROL_AE_MODE = new Key("android.control.aeMode", int.class); /** *

List of metering areas to use for auto-exposure adjustment.

*

Not available if {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AE android.control.maxRegionsAe} is 0. * Otherwise will always be present.

*

The maximum number of regions supported by the device is determined by the value * of {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AE android.control.maxRegionsAe}.

*

The coordinate system is based on the active pixel array, * with (0,0) being the top-left pixel in the active pixel array, and * ({@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.width - 1, * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.height - 1) being the * bottom-right pixel in the active pixel array.

*

The weight must be within [0, 1000], and represents a weight * for every pixel in the area. This means that a large metering area * with the same weight as a smaller area will have more effect in * the metering result. Metering areas can partially overlap and the * camera device will add the weights in the overlap region.

*

The weights are relative to weights of other exposure metering regions, so if only one * region is used, all non-zero weights will have the same effect. A region with 0 * weight is ignored.

*

If all regions have 0 weight, then no specific metering area needs to be used by the * camera device.

*

If the metering region is outside the used {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} returned in * capture result metadata, the camera device will ignore the sections outside the crop * region and output only the intersection rectangle as the metering region in the result * metadata. If the region is entirely outside the crop region, it will be ignored and * not reported in the result metadata.

*

Units: Pixel coordinates within {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Range of valid values:
* Coordinates must be between [(0,0), (width, height)) of * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#CONTROL_MAX_REGIONS_AE * @see CaptureRequest#SCALER_CROP_REGION * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key CONTROL_AE_REGIONS = new Key("android.control.aeRegions", android.hardware.camera2.params.MeteringRectangle[].class); /** *

Range over which the auto-exposure routine can * adjust the capture frame rate to maintain good * exposure.

*

Only constrains auto-exposure (AE) algorithm, not * manual control of {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime} and * {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration}.

*

Units: Frames per second (FPS)

*

Range of valid values:
* Any of the entries in {@link CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES android.control.aeAvailableTargetFpsRanges}

*

This key is available on all devices.

* * @see CameraCharacteristics#CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES * @see CaptureRequest#SENSOR_EXPOSURE_TIME * @see CaptureRequest#SENSOR_FRAME_DURATION */ @PublicKey public static final Key> CONTROL_AE_TARGET_FPS_RANGE = new Key>("android.control.aeTargetFpsRange", new TypeReference>() {{ }}); /** *

Whether the camera device will trigger a precapture * metering sequence when it processes this request.

*

This entry is normally set to IDLE, or is not * included at all in the request settings. When included and * set to START, the camera device will trigger the auto-exposure (AE) * precapture metering sequence.

*

When set to CANCEL, the camera device will cancel any active * precapture metering trigger, and return to its initial AE state. * If a precapture metering sequence is already completed, and the camera * device has implicitly locked the AE for subsequent still capture, the * CANCEL trigger will unlock the AE and return to its initial AE state.

*

The precapture sequence should be triggered before starting a * high-quality still capture for final metering decisions to * be made, and for firing pre-capture flash pulses to estimate * scene brightness and required final capture flash power, when * the flash is enabled.

*

Normally, this entry should be set to START for only a * single request, and the application should wait until the * sequence completes before starting a new one.

*

When a precapture metering sequence is finished, the camera device * may lock the auto-exposure routine internally to be able to accurately expose the * subsequent still capture image ({@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} == STILL_CAPTURE). * For this case, the AE may not resume normal scan if no subsequent still capture is * submitted. To ensure that the AE routine restarts normal scan, the application should * submit a request with {@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} == true, followed by a request * with {@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} == false, if the application decides not to submit a * still capture request after the precapture sequence completes. Alternatively, for * API level 23 or newer devices, the CANCEL can be used to unlock the camera device * internally locked AE if the application doesn't submit a still capture request after * the AE precapture trigger. Note that, the CANCEL was added in API level 23, and must not * be used in devices that have earlier API levels.

*

The exact effect of auto-exposure (AE) precapture trigger * depends on the current AE mode and state; see * {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} for AE precapture state transition * details.

*

On LEGACY-level devices, the precapture trigger is not supported; * capturing a high-resolution JPEG image will automatically trigger a * precapture sequence before the high-resolution capture, including * potentially firing a pre-capture flash.

*

Using the precapture trigger and the auto-focus trigger {@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger} * simultaneously is allowed. However, since these triggers often require cooperation between * the auto-focus and auto-exposure routines (for example, the may need to be enabled for a * focus sweep), the camera device may delay acting on a later trigger until the previous * trigger has been fully handled. This may lead to longer intervals between the trigger and * changes to {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} indicating the start of the precapture sequence, for * example.

*

If both the precapture and the auto-focus trigger are activated on the same request, then * the camera device will complete them in the optimal order for that device.

*

Possible values: *

    *
  • {@link #CONTROL_AE_PRECAPTURE_TRIGGER_IDLE IDLE}
  • *
  • {@link #CONTROL_AE_PRECAPTURE_TRIGGER_START START}
  • *
  • {@link #CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL CANCEL}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_LOCK * @see CaptureResult#CONTROL_AE_STATE * @see CaptureRequest#CONTROL_AF_TRIGGER * @see CaptureRequest#CONTROL_CAPTURE_INTENT * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #CONTROL_AE_PRECAPTURE_TRIGGER_IDLE * @see #CONTROL_AE_PRECAPTURE_TRIGGER_START * @see #CONTROL_AE_PRECAPTURE_TRIGGER_CANCEL */ @PublicKey public static final Key CONTROL_AE_PRECAPTURE_TRIGGER = new Key("android.control.aePrecaptureTrigger", int.class); /** *

Current state of the auto-exposure (AE) algorithm.

*

Switching between or enabling AE modes ({@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode}) always * resets the AE state to INACTIVE. Similarly, switching between {@link CaptureRequest#CONTROL_MODE android.control.mode}, * or {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} if {@link CaptureRequest#CONTROL_MODE android.control.mode} == USE_SCENE_MODE resets all * the algorithm states to INACTIVE.

*

The camera device can do several state transitions between two results, if it is * allowed by the state transition table. For example: INACTIVE may never actually be * seen in a result.

*

The state in the result is the state for this image (in sync with this image): if * AE state becomes CONVERGED, then the image data associated with this result should * be good to use.

*

Below are state transition tables for different AE modes.

* * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVEINACTIVECamera device auto exposure algorithm is disabled
*

When {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is AE_MODE_ON_*:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device initiates AE scanSEARCHINGValues changing
INACTIVE{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is ONLOCKEDValues locked
SEARCHINGCamera device finishes AE scanCONVERGEDGood values, not changing
SEARCHINGCamera device finishes AE scanFLASH_REQUIREDConverged but too dark w/o flash
SEARCHING{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is ONLOCKEDValues locked
CONVERGEDCamera device initiates AE scanSEARCHINGValues changing
CONVERGED{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is ONLOCKEDValues locked
FLASH_REQUIREDCamera device initiates AE scanSEARCHINGValues changing
FLASH_REQUIRED{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is ONLOCKEDValues locked
LOCKED{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is OFFSEARCHINGValues not good after unlock
LOCKED{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is OFFCONVERGEDValues good after unlock
LOCKED{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is OFFFLASH_REQUIREDExposure good, but too dark
PRECAPTURESequence done. {@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is OFFCONVERGEDReady for high-quality capture
PRECAPTURESequence done. {@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} is ONLOCKEDReady for high-quality capture
LOCKEDaeLock is ON and aePrecaptureTrigger is STARTLOCKEDPrecapture trigger is ignored when AE is already locked
LOCKEDaeLock is ON and aePrecaptureTrigger is CANCELLOCKEDPrecapture trigger is ignored when AE is already locked
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is STARTPRECAPTUREStart AE precapture metering sequence
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is CANCELINACTIVECurrently active precapture metering sequence is canceled
*

For the above table, the camera device may skip reporting any state changes that happen * without application intervention (i.e. mode switch, trigger, locking). Any state that * can be skipped in that manner is called a transient state.

*

For example, for above AE modes (AE_MODE_ON_*), in addition to the state transitions * listed in above table, it is also legal for the camera device to skip one or more * transient states between two results. See below table for examples:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device finished AE scanCONVERGEDValues are already good, transient states are skipped by camera device.
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is START, sequence doneFLASH_REQUIREDConverged but too dark w/o flash after a precapture sequence, transient states are skipped by camera device.
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is START, sequence doneCONVERGEDConverged after a precapture sequence, transient states are skipped by camera device.
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is CANCEL, convergedFLASH_REQUIREDConverged but too dark w/o flash after a precapture sequence is canceled, transient states are skipped by camera device.
Any state (excluding LOCKED){@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} is CANCEL, convergedCONVERGEDConverged after a precapture sequenceis canceled, transient states are skipped by camera device.
CONVERGEDCamera device finished AE scanFLASH_REQUIREDConverged but too dark w/o flash after a new scan, transient states are skipped by camera device.
FLASH_REQUIREDCamera device finished AE scanCONVERGEDConverged after a new scan, transient states are skipped by camera device.
*

Possible values: *

    *
  • {@link #CONTROL_AE_STATE_INACTIVE INACTIVE}
  • *
  • {@link #CONTROL_AE_STATE_SEARCHING SEARCHING}
  • *
  • {@link #CONTROL_AE_STATE_CONVERGED CONVERGED}
  • *
  • {@link #CONTROL_AE_STATE_LOCKED LOCKED}
  • *
  • {@link #CONTROL_AE_STATE_FLASH_REQUIRED FLASH_REQUIRED}
  • *
  • {@link #CONTROL_AE_STATE_PRECAPTURE PRECAPTURE}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_LOCK * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER * @see CaptureRequest#CONTROL_MODE * @see CaptureRequest#CONTROL_SCENE_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #CONTROL_AE_STATE_INACTIVE * @see #CONTROL_AE_STATE_SEARCHING * @see #CONTROL_AE_STATE_CONVERGED * @see #CONTROL_AE_STATE_LOCKED * @see #CONTROL_AE_STATE_FLASH_REQUIRED * @see #CONTROL_AE_STATE_PRECAPTURE */ @PublicKey public static final Key CONTROL_AE_STATE = new Key("android.control.aeState", int.class); /** *

Whether auto-focus (AF) is currently enabled, and what * mode it is set to.

*

Only effective if {@link CaptureRequest#CONTROL_MODE android.control.mode} = AUTO and the lens is not fixed focus * (i.e. {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance} > 0). Also note that * when {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is OFF, the behavior of AF is device * dependent. It is recommended to lock AF by using {@link CaptureRequest#CONTROL_AF_TRIGGER android.control.afTrigger} before * setting {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} to OFF, or set AF mode to OFF when AE is OFF.

*

If the lens is controlled by the camera device auto-focus algorithm, * the camera device will report the current AF status in {@link CaptureResult#CONTROL_AF_STATE android.control.afState} * in result metadata.

*

Possible values: *

    *
  • {@link #CONTROL_AF_MODE_OFF OFF}
  • *
  • {@link #CONTROL_AF_MODE_AUTO AUTO}
  • *
  • {@link #CONTROL_AF_MODE_MACRO MACRO}
  • *
  • {@link #CONTROL_AF_MODE_CONTINUOUS_VIDEO CONTINUOUS_VIDEO}
  • *
  • {@link #CONTROL_AF_MODE_CONTINUOUS_PICTURE CONTINUOUS_PICTURE}
  • *
  • {@link #CONTROL_AF_MODE_EDOF EDOF}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AF_AVAILABLE_MODES android.control.afAvailableModes}

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AE_MODE * @see CameraCharacteristics#CONTROL_AF_AVAILABLE_MODES * @see CaptureResult#CONTROL_AF_STATE * @see CaptureRequest#CONTROL_AF_TRIGGER * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE * @see #CONTROL_AF_MODE_OFF * @see #CONTROL_AF_MODE_AUTO * @see #CONTROL_AF_MODE_MACRO * @see #CONTROL_AF_MODE_CONTINUOUS_VIDEO * @see #CONTROL_AF_MODE_CONTINUOUS_PICTURE * @see #CONTROL_AF_MODE_EDOF */ @PublicKey public static final Key CONTROL_AF_MODE = new Key("android.control.afMode", int.class); /** *

List of metering areas to use for auto-focus.

*

Not available if {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AF android.control.maxRegionsAf} is 0. * Otherwise will always be present.

*

The maximum number of focus areas supported by the device is determined by the value * of {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AF android.control.maxRegionsAf}.

*

The coordinate system is based on the active pixel array, * with (0,0) being the top-left pixel in the active pixel array, and * ({@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.width - 1, * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.height - 1) being the * bottom-right pixel in the active pixel array.

*

The weight must be within [0, 1000], and represents a weight * for every pixel in the area. This means that a large metering area * with the same weight as a smaller area will have more effect in * the metering result. Metering areas can partially overlap and the * camera device will add the weights in the overlap region.

*

The weights are relative to weights of other metering regions, so if only one region * is used, all non-zero weights will have the same effect. A region with 0 weight is * ignored.

*

If all regions have 0 weight, then no specific metering area needs to be used by the * camera device.

*

If the metering region is outside the used {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} returned in * capture result metadata, the camera device will ignore the sections outside the crop * region and output only the intersection rectangle as the metering region in the result * metadata. If the region is entirely outside the crop region, it will be ignored and * not reported in the result metadata.

*

Units: Pixel coordinates within {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Range of valid values:
* Coordinates must be between [(0,0), (width, height)) of * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#CONTROL_MAX_REGIONS_AF * @see CaptureRequest#SCALER_CROP_REGION * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key CONTROL_AF_REGIONS = new Key("android.control.afRegions", android.hardware.camera2.params.MeteringRectangle[].class); /** *

Whether the camera device will trigger autofocus for this request.

*

This entry is normally set to IDLE, or is not * included at all in the request settings.

*

When included and set to START, the camera device will trigger the * autofocus algorithm. If autofocus is disabled, this trigger has no effect.

*

When set to CANCEL, the camera device will cancel any active trigger, * and return to its initial AF state.

*

Generally, applications should set this entry to START or CANCEL for only a * single capture, and then return it to IDLE (or not set at all). Specifying * START for multiple captures in a row means restarting the AF operation over * and over again.

*

See {@link CaptureResult#CONTROL_AF_STATE android.control.afState} for what the trigger means for each AF mode.

*

Using the autofocus trigger and the precapture trigger {@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger} * simultaneously is allowed. However, since these triggers often require cooperation between * the auto-focus and auto-exposure routines (for example, the may need to be enabled for a * focus sweep), the camera device may delay acting on a later trigger until the previous * trigger has been fully handled. This may lead to longer intervals between the trigger and * changes to {@link CaptureResult#CONTROL_AF_STATE android.control.afState}, for example.

*

Possible values: *

    *
  • {@link #CONTROL_AF_TRIGGER_IDLE IDLE}
  • *
  • {@link #CONTROL_AF_TRIGGER_START START}
  • *
  • {@link #CONTROL_AF_TRIGGER_CANCEL CANCEL}
  • *

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER * @see CaptureResult#CONTROL_AF_STATE * @see #CONTROL_AF_TRIGGER_IDLE * @see #CONTROL_AF_TRIGGER_START * @see #CONTROL_AF_TRIGGER_CANCEL */ @PublicKey public static final Key CONTROL_AF_TRIGGER = new Key("android.control.afTrigger", int.class); /** *

Current state of auto-focus (AF) algorithm.

*

Switching between or enabling AF modes ({@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}) always * resets the AF state to INACTIVE. Similarly, switching between {@link CaptureRequest#CONTROL_MODE android.control.mode}, * or {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} if {@link CaptureRequest#CONTROL_MODE android.control.mode} == USE_SCENE_MODE resets all * the algorithm states to INACTIVE.

*

The camera device can do several state transitions between two results, if it is * allowed by the state transition table. For example: INACTIVE may never actually be * seen in a result.

*

The state in the result is the state for this image (in sync with this image): if * AF state becomes FOCUSED, then the image data associated with this result should * be sharp.

*

Below are state transition tables for different AF modes.

*

When {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} is AF_MODE_OFF or AF_MODE_EDOF:

* * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVEINACTIVENever changes
*

When {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} is AF_MODE_AUTO or AF_MODE_MACRO:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVEAF_TRIGGERACTIVE_SCANStart AF sweep, Lens now moving
ACTIVE_SCANAF sweep doneFOCUSED_LOCKEDFocused, Lens now locked
ACTIVE_SCANAF sweep doneNOT_FOCUSED_LOCKEDNot focused, Lens now locked
ACTIVE_SCANAF_CANCELINACTIVECancel/reset AF, Lens now locked
FOCUSED_LOCKEDAF_CANCELINACTIVECancel/reset AF
FOCUSED_LOCKEDAF_TRIGGERACTIVE_SCANStart new sweep, Lens now moving
NOT_FOCUSED_LOCKEDAF_CANCELINACTIVECancel/reset AF
NOT_FOCUSED_LOCKEDAF_TRIGGERACTIVE_SCANStart new sweep, Lens now moving
Any stateMode changeINACTIVE
*

For the above table, the camera device may skip reporting any state changes that happen * without application intervention (i.e. mode switch, trigger, locking). Any state that * can be skipped in that manner is called a transient state.

*

For example, for these AF modes (AF_MODE_AUTO and AF_MODE_MACRO), in addition to the * state transitions listed in above table, it is also legal for the camera device to skip * one or more transient states between two results. See below table for examples:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVEAF_TRIGGERFOCUSED_LOCKEDFocus is already good or good after a scan, lens is now locked.
INACTIVEAF_TRIGGERNOT_FOCUSED_LOCKEDFocus failed after a scan, lens is now locked.
FOCUSED_LOCKEDAF_TRIGGERFOCUSED_LOCKEDFocus is already good or good after a scan, lens is now locked.
NOT_FOCUSED_LOCKEDAF_TRIGGERFOCUSED_LOCKEDFocus is good after a scan, lens is not locked.
*

When {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} is AF_MODE_CONTINUOUS_VIDEO:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
INACTIVEAF_TRIGGERNOT_FOCUSED_LOCKEDAF state query, Lens now locked
PASSIVE_SCANCamera device completes current scanPASSIVE_FOCUSEDEnd AF scan, Lens now locked
PASSIVE_SCANCamera device fails current scanPASSIVE_UNFOCUSEDEnd AF scan, Lens now locked
PASSIVE_SCANAF_TRIGGERFOCUSED_LOCKEDImmediate transition, if focus is good. Lens now locked
PASSIVE_SCANAF_TRIGGERNOT_FOCUSED_LOCKEDImmediate transition, if focus is bad. Lens now locked
PASSIVE_SCANAF_CANCELINACTIVEReset lens position, Lens now locked
PASSIVE_FOCUSEDCamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
PASSIVE_UNFOCUSEDCamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
PASSIVE_FOCUSEDAF_TRIGGERFOCUSED_LOCKEDImmediate transition, lens now locked
PASSIVE_UNFOCUSEDAF_TRIGGERNOT_FOCUSED_LOCKEDImmediate transition, lens now locked
FOCUSED_LOCKEDAF_TRIGGERFOCUSED_LOCKEDNo effect
FOCUSED_LOCKEDAF_CANCELINACTIVERestart AF scan
NOT_FOCUSED_LOCKEDAF_TRIGGERNOT_FOCUSED_LOCKEDNo effect
NOT_FOCUSED_LOCKEDAF_CANCELINACTIVERestart AF scan
*

When {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} is AF_MODE_CONTINUOUS_PICTURE:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
INACTIVEAF_TRIGGERNOT_FOCUSED_LOCKEDAF state query, Lens now locked
PASSIVE_SCANCamera device completes current scanPASSIVE_FOCUSEDEnd AF scan, Lens now locked
PASSIVE_SCANCamera device fails current scanPASSIVE_UNFOCUSEDEnd AF scan, Lens now locked
PASSIVE_SCANAF_TRIGGERFOCUSED_LOCKEDEventual transition once the focus is good. Lens now locked
PASSIVE_SCANAF_TRIGGERNOT_FOCUSED_LOCKEDEventual transition if cannot find focus. Lens now locked
PASSIVE_SCANAF_CANCELINACTIVEReset lens position, Lens now locked
PASSIVE_FOCUSEDCamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
PASSIVE_UNFOCUSEDCamera device initiates new scanPASSIVE_SCANStart AF scan, Lens now moving
PASSIVE_FOCUSEDAF_TRIGGERFOCUSED_LOCKEDImmediate trans. Lens now locked
PASSIVE_UNFOCUSEDAF_TRIGGERNOT_FOCUSED_LOCKEDImmediate trans. Lens now locked
FOCUSED_LOCKEDAF_TRIGGERFOCUSED_LOCKEDNo effect
FOCUSED_LOCKEDAF_CANCELINACTIVERestart AF scan
NOT_FOCUSED_LOCKEDAF_TRIGGERNOT_FOCUSED_LOCKEDNo effect
NOT_FOCUSED_LOCKEDAF_CANCELINACTIVERestart AF scan
*

When switch between AF_MODE_CONTINUOUS_* (CAF modes) and AF_MODE_AUTO/AF_MODE_MACRO * (AUTO modes), the initial INACTIVE or PASSIVE_SCAN states may be skipped by the * camera device. When a trigger is included in a mode switch request, the trigger * will be evaluated in the context of the new mode in the request. * See below table for examples:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
any stateCAF-->AUTO mode switchINACTIVEMode switch without trigger, initial state must be INACTIVE
any stateCAF-->AUTO mode switch with AF_TRIGGERtrigger-reachable states from INACTIVEMode switch with trigger, INACTIVE is skipped
any stateAUTO-->CAF mode switchpassively reachable states from INACTIVEMode switch without trigger, passive transient state is skipped
*

Possible values: *

    *
  • {@link #CONTROL_AF_STATE_INACTIVE INACTIVE}
  • *
  • {@link #CONTROL_AF_STATE_PASSIVE_SCAN PASSIVE_SCAN}
  • *
  • {@link #CONTROL_AF_STATE_PASSIVE_FOCUSED PASSIVE_FOCUSED}
  • *
  • {@link #CONTROL_AF_STATE_ACTIVE_SCAN ACTIVE_SCAN}
  • *
  • {@link #CONTROL_AF_STATE_FOCUSED_LOCKED FOCUSED_LOCKED}
  • *
  • {@link #CONTROL_AF_STATE_NOT_FOCUSED_LOCKED NOT_FOCUSED_LOCKED}
  • *
  • {@link #CONTROL_AF_STATE_PASSIVE_UNFOCUSED PASSIVE_UNFOCUSED}
  • *

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AF_MODE * @see CaptureRequest#CONTROL_MODE * @see CaptureRequest#CONTROL_SCENE_MODE * @see #CONTROL_AF_STATE_INACTIVE * @see #CONTROL_AF_STATE_PASSIVE_SCAN * @see #CONTROL_AF_STATE_PASSIVE_FOCUSED * @see #CONTROL_AF_STATE_ACTIVE_SCAN * @see #CONTROL_AF_STATE_FOCUSED_LOCKED * @see #CONTROL_AF_STATE_NOT_FOCUSED_LOCKED * @see #CONTROL_AF_STATE_PASSIVE_UNFOCUSED */ @PublicKey public static final Key CONTROL_AF_STATE = new Key("android.control.afState", int.class); /** *

Whether auto-white balance (AWB) is currently locked to its * latest calculated values.

*

When set to true (ON), the AWB algorithm is locked to its latest parameters, * and will not change color balance settings until the lock is set to false (OFF).

*

Since the camera device has a pipeline of in-flight requests, the settings that * get locked do not necessarily correspond to the settings that were present in the * latest capture result received from the camera device, since additional captures * and AWB updates may have occurred even before the result was sent out. If an * application is switching between automatic and manual control and wishes to eliminate * any flicker during the switch, the following procedure is recommended:

*
    *
  1. Starting in auto-AWB mode:
  2. *
  3. Lock AWB
  4. *
  5. Wait for the first result to be output that has the AWB locked
  6. *
  7. Copy AWB settings from that result into a request, set the request to manual AWB
  8. *
  9. Submit the capture request, proceed to run manual AWB as desired.
  10. *
*

Note that AWB lock is only meaningful when * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} is in the AUTO mode; in other modes, * AWB is already fixed to a specific setting.

*

Some LEGACY devices may not support ON; the value is then overridden to OFF.

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AWB_MODE */ @PublicKey public static final Key CONTROL_AWB_LOCK = new Key("android.control.awbLock", boolean.class); /** *

Whether auto-white balance (AWB) is currently setting the color * transform fields, and what its illumination target * is.

*

This control is only effective if {@link CaptureRequest#CONTROL_MODE android.control.mode} is AUTO.

*

When set to the ON mode, the camera device's auto-white balance * routine is enabled, overriding the application's selected * {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} and * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}. Note that when {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} * is OFF, the behavior of AWB is device dependent. It is recommened to * also set AWB mode to OFF or lock AWB by using {@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} before * setting AE mode to OFF.

*

When set to the OFF mode, the camera device's auto-white balance * routine is disabled. The application manually controls the white * balance by {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} * and {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode}.

*

When set to any other modes, the camera device's auto-white * balance routine is disabled. The camera device uses each * particular illumination target for white balance * adjustment. The application's values for * {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform}, * {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} and * {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} are ignored.

*

Possible values: *

    *
  • {@link #CONTROL_AWB_MODE_OFF OFF}
  • *
  • {@link #CONTROL_AWB_MODE_AUTO AUTO}
  • *
  • {@link #CONTROL_AWB_MODE_INCANDESCENT INCANDESCENT}
  • *
  • {@link #CONTROL_AWB_MODE_FLUORESCENT FLUORESCENT}
  • *
  • {@link #CONTROL_AWB_MODE_WARM_FLUORESCENT WARM_FLUORESCENT}
  • *
  • {@link #CONTROL_AWB_MODE_DAYLIGHT DAYLIGHT}
  • *
  • {@link #CONTROL_AWB_MODE_CLOUDY_DAYLIGHT CLOUDY_DAYLIGHT}
  • *
  • {@link #CONTROL_AWB_MODE_TWILIGHT TWILIGHT}
  • *
  • {@link #CONTROL_AWB_MODE_SHADE SHADE}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AWB_AVAILABLE_MODES android.control.awbAvailableModes}

*

This key is available on all devices.

* * @see CaptureRequest#COLOR_CORRECTION_GAINS * @see CaptureRequest#COLOR_CORRECTION_MODE * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM * @see CaptureRequest#CONTROL_AE_MODE * @see CameraCharacteristics#CONTROL_AWB_AVAILABLE_MODES * @see CaptureRequest#CONTROL_AWB_LOCK * @see CaptureRequest#CONTROL_MODE * @see #CONTROL_AWB_MODE_OFF * @see #CONTROL_AWB_MODE_AUTO * @see #CONTROL_AWB_MODE_INCANDESCENT * @see #CONTROL_AWB_MODE_FLUORESCENT * @see #CONTROL_AWB_MODE_WARM_FLUORESCENT * @see #CONTROL_AWB_MODE_DAYLIGHT * @see #CONTROL_AWB_MODE_CLOUDY_DAYLIGHT * @see #CONTROL_AWB_MODE_TWILIGHT * @see #CONTROL_AWB_MODE_SHADE */ @PublicKey public static final Key CONTROL_AWB_MODE = new Key("android.control.awbMode", int.class); /** *

List of metering areas to use for auto-white-balance illuminant * estimation.

*

Not available if {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AWB android.control.maxRegionsAwb} is 0. * Otherwise will always be present.

*

The maximum number of regions supported by the device is determined by the value * of {@link CameraCharacteristics#CONTROL_MAX_REGIONS_AWB android.control.maxRegionsAwb}.

*

The coordinate system is based on the active pixel array, * with (0,0) being the top-left pixel in the active pixel array, and * ({@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.width - 1, * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.height - 1) being the * bottom-right pixel in the active pixel array.

*

The weight must range from 0 to 1000, and represents a weight * for every pixel in the area. This means that a large metering area * with the same weight as a smaller area will have more effect in * the metering result. Metering areas can partially overlap and the * camera device will add the weights in the overlap region.

*

The weights are relative to weights of other white balance metering regions, so if * only one region is used, all non-zero weights will have the same effect. A region with * 0 weight is ignored.

*

If all regions have 0 weight, then no specific metering area needs to be used by the * camera device.

*

If the metering region is outside the used {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} returned in * capture result metadata, the camera device will ignore the sections outside the crop * region and output only the intersection rectangle as the metering region in the result * metadata. If the region is entirely outside the crop region, it will be ignored and * not reported in the result metadata.

*

Units: Pixel coordinates within {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Range of valid values:
* Coordinates must be between [(0,0), (width, height)) of * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#CONTROL_MAX_REGIONS_AWB * @see CaptureRequest#SCALER_CROP_REGION * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key CONTROL_AWB_REGIONS = new Key("android.control.awbRegions", android.hardware.camera2.params.MeteringRectangle[].class); /** *

Information to the camera device 3A (auto-exposure, * auto-focus, auto-white balance) routines about the purpose * of this capture, to help the camera device to decide optimal 3A * strategy.

*

This control (except for MANUAL) is only effective if * {@link CaptureRequest#CONTROL_MODE android.control.mode} != OFF and any 3A routine is active.

*

ZERO_SHUTTER_LAG will be supported if {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} * contains PRIVATE_REPROCESSING or YUV_REPROCESSING. MANUAL will be supported if * {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains MANUAL_SENSOR. Other intent values are * always supported.

*

Possible values: *

    *
  • {@link #CONTROL_CAPTURE_INTENT_CUSTOM CUSTOM}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_PREVIEW PREVIEW}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_STILL_CAPTURE STILL_CAPTURE}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_VIDEO_RECORD VIDEO_RECORD}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT VIDEO_SNAPSHOT}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG ZERO_SHUTTER_LAG}
  • *
  • {@link #CONTROL_CAPTURE_INTENT_MANUAL MANUAL}
  • *

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES * @see #CONTROL_CAPTURE_INTENT_CUSTOM * @see #CONTROL_CAPTURE_INTENT_PREVIEW * @see #CONTROL_CAPTURE_INTENT_STILL_CAPTURE * @see #CONTROL_CAPTURE_INTENT_VIDEO_RECORD * @see #CONTROL_CAPTURE_INTENT_VIDEO_SNAPSHOT * @see #CONTROL_CAPTURE_INTENT_ZERO_SHUTTER_LAG * @see #CONTROL_CAPTURE_INTENT_MANUAL */ @PublicKey public static final Key CONTROL_CAPTURE_INTENT = new Key("android.control.captureIntent", int.class); /** *

Current state of auto-white balance (AWB) algorithm.

*

Switching between or enabling AWB modes ({@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}) always * resets the AWB state to INACTIVE. Similarly, switching between {@link CaptureRequest#CONTROL_MODE android.control.mode}, * or {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} if {@link CaptureRequest#CONTROL_MODE android.control.mode} == USE_SCENE_MODE resets all * the algorithm states to INACTIVE.

*

The camera device can do several state transitions between two results, if it is * allowed by the state transition table. So INACTIVE may never actually be seen in * a result.

*

The state in the result is the state for this image (in sync with this image): if * AWB state becomes CONVERGED, then the image data associated with this result should * be good to use.

*

Below are state transition tables for different AWB modes.

*

When {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} != AWB_MODE_AUTO:

* * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVEINACTIVECamera device auto white balance algorithm is disabled
*

When {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} is AWB_MODE_AUTO:

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device initiates AWB scanSEARCHINGValues changing
INACTIVE{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} is ONLOCKEDValues locked
SEARCHINGCamera device finishes AWB scanCONVERGEDGood values, not changing
SEARCHING{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} is ONLOCKEDValues locked
CONVERGEDCamera device initiates AWB scanSEARCHINGValues changing
CONVERGED{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} is ONLOCKEDValues locked
LOCKED{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} is OFFSEARCHINGValues not good after unlock
*

For the above table, the camera device may skip reporting any state changes that happen * without application intervention (i.e. mode switch, trigger, locking). Any state that * can be skipped in that manner is called a transient state.

*

For example, for this AWB mode (AWB_MODE_AUTO), in addition to the state transitions * listed in above table, it is also legal for the camera device to skip one or more * transient states between two results. See below table for examples:

* * * * * * * * * * * * * * * * * * * * * * * *
StateTransition CauseNew StateNotes
INACTIVECamera device finished AWB scanCONVERGEDValues are already good, transient states are skipped by camera device.
LOCKED{@link CaptureRequest#CONTROL_AWB_LOCK android.control.awbLock} is OFFCONVERGEDValues good after unlock, transient states are skipped by camera device.
*

Possible values: *

    *
  • {@link #CONTROL_AWB_STATE_INACTIVE INACTIVE}
  • *
  • {@link #CONTROL_AWB_STATE_SEARCHING SEARCHING}
  • *
  • {@link #CONTROL_AWB_STATE_CONVERGED CONVERGED}
  • *
  • {@link #CONTROL_AWB_STATE_LOCKED LOCKED}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AWB_LOCK * @see CaptureRequest#CONTROL_AWB_MODE * @see CaptureRequest#CONTROL_MODE * @see CaptureRequest#CONTROL_SCENE_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #CONTROL_AWB_STATE_INACTIVE * @see #CONTROL_AWB_STATE_SEARCHING * @see #CONTROL_AWB_STATE_CONVERGED * @see #CONTROL_AWB_STATE_LOCKED */ @PublicKey public static final Key CONTROL_AWB_STATE = new Key("android.control.awbState", int.class); /** *

A special color effect to apply.

*

When this mode is set, a color effect will be applied * to images produced by the camera device. The interpretation * and implementation of these color effects is left to the * implementor of the camera device, and should not be * depended on to be consistent (or present) across all * devices.

*

Possible values: *

    *
  • {@link #CONTROL_EFFECT_MODE_OFF OFF}
  • *
  • {@link #CONTROL_EFFECT_MODE_MONO MONO}
  • *
  • {@link #CONTROL_EFFECT_MODE_NEGATIVE NEGATIVE}
  • *
  • {@link #CONTROL_EFFECT_MODE_SOLARIZE SOLARIZE}
  • *
  • {@link #CONTROL_EFFECT_MODE_SEPIA SEPIA}
  • *
  • {@link #CONTROL_EFFECT_MODE_POSTERIZE POSTERIZE}
  • *
  • {@link #CONTROL_EFFECT_MODE_WHITEBOARD WHITEBOARD}
  • *
  • {@link #CONTROL_EFFECT_MODE_BLACKBOARD BLACKBOARD}
  • *
  • {@link #CONTROL_EFFECT_MODE_AQUA AQUA}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AVAILABLE_EFFECTS android.control.availableEffects}

*

This key is available on all devices.

* * @see CameraCharacteristics#CONTROL_AVAILABLE_EFFECTS * @see #CONTROL_EFFECT_MODE_OFF * @see #CONTROL_EFFECT_MODE_MONO * @see #CONTROL_EFFECT_MODE_NEGATIVE * @see #CONTROL_EFFECT_MODE_SOLARIZE * @see #CONTROL_EFFECT_MODE_SEPIA * @see #CONTROL_EFFECT_MODE_POSTERIZE * @see #CONTROL_EFFECT_MODE_WHITEBOARD * @see #CONTROL_EFFECT_MODE_BLACKBOARD * @see #CONTROL_EFFECT_MODE_AQUA */ @PublicKey public static final Key CONTROL_EFFECT_MODE = new Key("android.control.effectMode", int.class); /** *

Overall mode of 3A (auto-exposure, auto-white-balance, auto-focus) control * routines.

*

This is a top-level 3A control switch. When set to OFF, all 3A control * by the camera device is disabled. The application must set the fields for * capture parameters itself.

*

When set to AUTO, the individual algorithm controls in * android.control.* are in effect, such as {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}.

*

When set to USE_SCENE_MODE, the individual controls in * android.control.* are mostly disabled, and the camera device implements * one of the scene mode settings (such as ACTION, SUNSET, or PARTY) * as it wishes. The camera device scene mode 3A settings are provided by * {@link android.hardware.camera2.CaptureResult capture results}.

*

When set to OFF_KEEP_STATE, it is similar to OFF mode, the only difference * is that this frame will not be used by camera device background 3A statistics * update, as if this frame is never captured. This mode can be used in the scenario * where the application doesn't want a 3A manual control capture to affect * the subsequent auto 3A capture results.

*

Possible values: *

    *
  • {@link #CONTROL_MODE_OFF OFF}
  • *
  • {@link #CONTROL_MODE_AUTO AUTO}
  • *
  • {@link #CONTROL_MODE_USE_SCENE_MODE USE_SCENE_MODE}
  • *
  • {@link #CONTROL_MODE_OFF_KEEP_STATE OFF_KEEP_STATE}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AVAILABLE_MODES android.control.availableModes}

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AF_MODE * @see CameraCharacteristics#CONTROL_AVAILABLE_MODES * @see #CONTROL_MODE_OFF * @see #CONTROL_MODE_AUTO * @see #CONTROL_MODE_USE_SCENE_MODE * @see #CONTROL_MODE_OFF_KEEP_STATE */ @PublicKey public static final Key CONTROL_MODE = new Key("android.control.mode", int.class); /** *

Control for which scene mode is currently active.

*

Scene modes are custom camera modes optimized for a certain set of conditions and * capture settings.

*

This is the mode that that is active when * {@link CaptureRequest#CONTROL_MODE android.control.mode} == USE_SCENE_MODE. Aside from FACE_PRIORITY, these modes will * disable {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode}, {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}, and {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} * while in use.

*

The interpretation and implementation of these scene modes is left * to the implementor of the camera device. Their behavior will not be * consistent across all devices, and any given device may only implement * a subset of these modes.

*

Possible values: *

    *
  • {@link #CONTROL_SCENE_MODE_DISABLED DISABLED}
  • *
  • {@link #CONTROL_SCENE_MODE_FACE_PRIORITY FACE_PRIORITY}
  • *
  • {@link #CONTROL_SCENE_MODE_ACTION ACTION}
  • *
  • {@link #CONTROL_SCENE_MODE_PORTRAIT PORTRAIT}
  • *
  • {@link #CONTROL_SCENE_MODE_LANDSCAPE LANDSCAPE}
  • *
  • {@link #CONTROL_SCENE_MODE_NIGHT NIGHT}
  • *
  • {@link #CONTROL_SCENE_MODE_NIGHT_PORTRAIT NIGHT_PORTRAIT}
  • *
  • {@link #CONTROL_SCENE_MODE_THEATRE THEATRE}
  • *
  • {@link #CONTROL_SCENE_MODE_BEACH BEACH}
  • *
  • {@link #CONTROL_SCENE_MODE_SNOW SNOW}
  • *
  • {@link #CONTROL_SCENE_MODE_SUNSET SUNSET}
  • *
  • {@link #CONTROL_SCENE_MODE_STEADYPHOTO STEADYPHOTO}
  • *
  • {@link #CONTROL_SCENE_MODE_FIREWORKS FIREWORKS}
  • *
  • {@link #CONTROL_SCENE_MODE_SPORTS SPORTS}
  • *
  • {@link #CONTROL_SCENE_MODE_PARTY PARTY}
  • *
  • {@link #CONTROL_SCENE_MODE_CANDLELIGHT CANDLELIGHT}
  • *
  • {@link #CONTROL_SCENE_MODE_BARCODE BARCODE}
  • *
  • {@link #CONTROL_SCENE_MODE_HIGH_SPEED_VIDEO HIGH_SPEED_VIDEO}
  • *
  • {@link #CONTROL_SCENE_MODE_HDR HDR}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES android.control.availableSceneModes}

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_AF_MODE * @see CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES * @see CaptureRequest#CONTROL_AWB_MODE * @see CaptureRequest#CONTROL_MODE * @see #CONTROL_SCENE_MODE_DISABLED * @see #CONTROL_SCENE_MODE_FACE_PRIORITY * @see #CONTROL_SCENE_MODE_ACTION * @see #CONTROL_SCENE_MODE_PORTRAIT * @see #CONTROL_SCENE_MODE_LANDSCAPE * @see #CONTROL_SCENE_MODE_NIGHT * @see #CONTROL_SCENE_MODE_NIGHT_PORTRAIT * @see #CONTROL_SCENE_MODE_THEATRE * @see #CONTROL_SCENE_MODE_BEACH * @see #CONTROL_SCENE_MODE_SNOW * @see #CONTROL_SCENE_MODE_SUNSET * @see #CONTROL_SCENE_MODE_STEADYPHOTO * @see #CONTROL_SCENE_MODE_FIREWORKS * @see #CONTROL_SCENE_MODE_SPORTS * @see #CONTROL_SCENE_MODE_PARTY * @see #CONTROL_SCENE_MODE_CANDLELIGHT * @see #CONTROL_SCENE_MODE_BARCODE * @see #CONTROL_SCENE_MODE_HIGH_SPEED_VIDEO * @see #CONTROL_SCENE_MODE_HDR */ @PublicKey public static final Key CONTROL_SCENE_MODE = new Key("android.control.sceneMode", int.class); /** *

Whether video stabilization is * active.

*

Video stabilization automatically warps images from * the camera in order to stabilize motion between consecutive frames.

*

If enabled, video stabilization can modify the * {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} to keep the video stream stabilized.

*

Switching between different video stabilization modes may take several * frames to initialize, the camera device will report the current mode * in capture result metadata. For example, When "ON" mode is requested, * the video stabilization modes in the first several capture results may * still be "OFF", and it will become "ON" when the initialization is * done.

*

In addition, not all recording sizes or frame rates may be supported for * stabilization by a device that reports stabilization support. It is guaranteed * that an output targeting a MediaRecorder or MediaCodec will be stabilized if * the recording resolution is less than or equal to 1920 x 1080 (width less than * or equal to 1920, height less than or equal to 1080), and the recording * frame rate is less than or equal to 30fps. At other sizes, the CaptureResult * {@link CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE android.control.videoStabilizationMode} field will return * OFF if the recording output is not stabilized, or if there are no output * Surface types that can be stabilized.

*

If a camera device supports both this mode and OIS * ({@link CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE android.lens.opticalStabilizationMode}), turning both modes on may * produce undesirable interaction, so it is recommended not to enable * both at the same time.

*

Possible values: *

    *
  • {@link #CONTROL_VIDEO_STABILIZATION_MODE_OFF OFF}
  • *
  • {@link #CONTROL_VIDEO_STABILIZATION_MODE_ON ON}
  • *

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE * @see CaptureRequest#SCALER_CROP_REGION * @see #CONTROL_VIDEO_STABILIZATION_MODE_OFF * @see #CONTROL_VIDEO_STABILIZATION_MODE_ON */ @PublicKey public static final Key CONTROL_VIDEO_STABILIZATION_MODE = new Key("android.control.videoStabilizationMode", int.class); /** *

The amount of additional sensitivity boost applied to output images * after RAW sensor data is captured.

*

Some camera devices support additional digital sensitivity boosting in the * camera processing pipeline after sensor RAW image is captured. * Such a boost will be applied to YUV/JPEG format output images but will not * have effect on RAW output formats like RAW_SENSOR, RAW10, RAW12 or RAW_OPAQUE.

*

This key will be null for devices that do not support any RAW format * outputs. For devices that do support RAW format outputs, this key will always * present, and if a device does not support post RAW sensitivity boost, it will * list 100 in this key.

*

If the camera device cannot apply the exact boost requested, it will reduce the * boost to the nearest supported value. * The final boost value used will be available in the output capture result.

*

For devices that support post RAW sensitivity boost, the YUV/JPEG output images * of such device will have the total sensitivity of * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity} * {@link CaptureRequest#CONTROL_POST_RAW_SENSITIVITY_BOOST android.control.postRawSensitivityBoost} / 100 * The sensitivity of RAW format images will always be {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}

*

This control is only effective if {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} or {@link CaptureRequest#CONTROL_MODE android.control.mode} is set to * OFF; otherwise the auto-exposure algorithm will override this value.

*

Units: ISO arithmetic units, the same as {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}

*

Range of valid values:
* {@link CameraCharacteristics#CONTROL_POST_RAW_SENSITIVITY_BOOST_RANGE android.control.postRawSensitivityBoostRange}

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CaptureRequest#CONTROL_POST_RAW_SENSITIVITY_BOOST * @see CameraCharacteristics#CONTROL_POST_RAW_SENSITIVITY_BOOST_RANGE * @see CaptureRequest#SENSOR_SENSITIVITY */ @PublicKey public static final Key CONTROL_POST_RAW_SENSITIVITY_BOOST = new Key("android.control.postRawSensitivityBoost", int.class); /** *

Allow camera device to enable zero-shutter-lag mode for requests with * {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} == STILL_CAPTURE.

*

If enableZsl is true, the camera device may enable zero-shutter-lag mode for requests with * STILL_CAPTURE capture intent. The camera device may use images captured in the past to * produce output images for a zero-shutter-lag request. The result metadata including the * {@link CaptureResult#SENSOR_TIMESTAMP android.sensor.timestamp} reflects the source frames used to produce output images. * Therefore, the contents of the output images and the result metadata may be out of order * compared to previous regular requests. enableZsl does not affect requests with other * capture intents.

*

For example, when requests are submitted in the following order: * Request A: enableZsl is ON, {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} is PREVIEW * Request B: enableZsl is ON, {@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} is STILL_CAPTURE

*

The output images for request B may have contents captured before the output images for * request A, and the result metadata for request B may be older than the result metadata for * request A.

*

Note that when enableZsl is true, it is not guaranteed to get output images captured in * the past for requests with STILL_CAPTURE capture intent.

*

For applications targeting SDK versions O and newer, the value of enableZsl in * TEMPLATE_STILL_CAPTURE template may be true. The value in other templates is always * false if present.

*

For applications targeting SDK versions older than O, the value of enableZsl in all * capture templates is always false if present.

*

For application-operated ZSL, use CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG template.

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#CONTROL_CAPTURE_INTENT * @see CaptureResult#SENSOR_TIMESTAMP */ @PublicKey public static final Key CONTROL_ENABLE_ZSL = new Key("android.control.enableZsl", boolean.class); /** *

Operation mode for edge * enhancement.

*

Edge enhancement improves sharpness and details in the captured image. OFF means * no enhancement will be applied by the camera device.

*

FAST/HIGH_QUALITY both mean camera device determined enhancement * will be applied. HIGH_QUALITY mode indicates that the * camera device will use the highest-quality enhancement algorithms, * even if it slows down capture rate. FAST means the camera device will * not slow down capture rate when applying edge enhancement. FAST may be the same as OFF if * edge enhancement will slow down capture rate. Every output stream will have a similar * amount of enhancement applied.

*

ZERO_SHUTTER_LAG is meant to be used by applications that maintain a continuous circular * buffer of high-resolution images during preview and reprocess image(s) from that buffer * into a final capture when triggered by the user. In this mode, the camera device applies * edge enhancement to low-resolution streams (below maximum recording resolution) to * maximize preview quality, but does not apply edge enhancement to high-resolution streams, * since those will be reprocessed later if necessary.

*

For YUV_REPROCESSING, these FAST/HIGH_QUALITY modes both mean that the camera * device will apply FAST/HIGH_QUALITY YUV-domain edge enhancement, respectively. * The camera device may adjust its internal edge enhancement parameters for best * image quality based on the {@link CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR android.reprocess.effectiveExposureFactor}, if it is set.

*

Possible values: *

    *
  • {@link #EDGE_MODE_OFF OFF}
  • *
  • {@link #EDGE_MODE_FAST FAST}
  • *
  • {@link #EDGE_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *
  • {@link #EDGE_MODE_ZERO_SHUTTER_LAG ZERO_SHUTTER_LAG}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES android.edge.availableEdgeModes}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#EDGE_AVAILABLE_EDGE_MODES * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR * @see #EDGE_MODE_OFF * @see #EDGE_MODE_FAST * @see #EDGE_MODE_HIGH_QUALITY * @see #EDGE_MODE_ZERO_SHUTTER_LAG */ @PublicKey public static final Key EDGE_MODE = new Key("android.edge.mode", int.class); /** *

The desired mode for for the camera device's flash control.

*

This control is only effective when flash unit is available * ({@link CameraCharacteristics#FLASH_INFO_AVAILABLE android.flash.info.available} == true).

*

When this control is used, the {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} must be set to ON or OFF. * Otherwise, the camera device auto-exposure related flash control (ON_AUTO_FLASH, * ON_ALWAYS_FLASH, or ON_AUTO_FLASH_REDEYE) will override this control.

*

When set to OFF, the camera device will not fire flash for this capture.

*

When set to SINGLE, the camera device will fire flash regardless of the camera * device's auto-exposure routine's result. When used in still capture case, this * control should be used along with auto-exposure (AE) precapture metering sequence * ({@link CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER android.control.aePrecaptureTrigger}), otherwise, the image may be incorrectly exposed.

*

When set to TORCH, the flash will be on continuously. This mode can be used * for use cases such as preview, auto-focus assist, still capture, or video recording.

*

The flash status will be reported by {@link CaptureResult#FLASH_STATE android.flash.state} in the capture result metadata.

*

Possible values: *

    *
  • {@link #FLASH_MODE_OFF OFF}
  • *
  • {@link #FLASH_MODE_SINGLE SINGLE}
  • *
  • {@link #FLASH_MODE_TORCH TORCH}
  • *

*

This key is available on all devices.

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_AE_PRECAPTURE_TRIGGER * @see CameraCharacteristics#FLASH_INFO_AVAILABLE * @see CaptureResult#FLASH_STATE * @see #FLASH_MODE_OFF * @see #FLASH_MODE_SINGLE * @see #FLASH_MODE_TORCH */ @PublicKey public static final Key FLASH_MODE = new Key("android.flash.mode", int.class); /** *

Current state of the flash * unit.

*

When the camera device doesn't have flash unit * (i.e. {@link CameraCharacteristics#FLASH_INFO_AVAILABLE android.flash.info.available} == false), this state will always be UNAVAILABLE. * Other states indicate the current flash status.

*

In certain conditions, this will be available on LEGACY devices:

*
    *
  • Flash-less cameras always return UNAVAILABLE.
  • *
  • Using {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} == ON_ALWAYS_FLASH * will always return FIRED.
  • *
  • Using {@link CaptureRequest#FLASH_MODE android.flash.mode} == TORCH * will always return FIRED.
  • *
*

In all other conditions the state will not be available on * LEGACY devices (i.e. it will be null).

*

Possible values: *

    *
  • {@link #FLASH_STATE_UNAVAILABLE UNAVAILABLE}
  • *
  • {@link #FLASH_STATE_CHARGING CHARGING}
  • *
  • {@link #FLASH_STATE_READY READY}
  • *
  • {@link #FLASH_STATE_FIRED FIRED}
  • *
  • {@link #FLASH_STATE_PARTIAL PARTIAL}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CameraCharacteristics#FLASH_INFO_AVAILABLE * @see CaptureRequest#FLASH_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #FLASH_STATE_UNAVAILABLE * @see #FLASH_STATE_CHARGING * @see #FLASH_STATE_READY * @see #FLASH_STATE_FIRED * @see #FLASH_STATE_PARTIAL */ @PublicKey public static final Key FLASH_STATE = new Key("android.flash.state", int.class); /** *

Operational mode for hot pixel correction.

*

Hotpixel correction interpolates out, or otherwise removes, pixels * that do not accurately measure the incoming light (i.e. pixels that * are stuck at an arbitrary value or are oversensitive).

*

Possible values: *

    *
  • {@link #HOT_PIXEL_MODE_OFF OFF}
  • *
  • {@link #HOT_PIXEL_MODE_FAST FAST}
  • *
  • {@link #HOT_PIXEL_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#HOT_PIXEL_AVAILABLE_HOT_PIXEL_MODES android.hotPixel.availableHotPixelModes}

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#HOT_PIXEL_AVAILABLE_HOT_PIXEL_MODES * @see #HOT_PIXEL_MODE_OFF * @see #HOT_PIXEL_MODE_FAST * @see #HOT_PIXEL_MODE_HIGH_QUALITY */ @PublicKey public static final Key HOT_PIXEL_MODE = new Key("android.hotPixel.mode", int.class); /** *

A location object to use when generating image GPS metadata.

*

Setting a location object in a request will include the GPS coordinates of the location * into any JPEG images captured based on the request. These coordinates can then be * viewed by anyone who receives the JPEG image.

*

This key is available on all devices.

*/ @PublicKey @SyntheticKey public static final Key JPEG_GPS_LOCATION = new Key("android.jpeg.gpsLocation", android.location.Location.class); /** *

GPS coordinates to include in output JPEG * EXIF.

*

Range of valid values:
* (-180 - 180], [-90,90], [-inf, inf]

*

This key is available on all devices.

* @hide */ public static final Key JPEG_GPS_COORDINATES = new Key("android.jpeg.gpsCoordinates", double[].class); /** *

32 characters describing GPS algorithm to * include in EXIF.

*

Units: UTF-8 null-terminated string

*

This key is available on all devices.

* @hide */ public static final Key JPEG_GPS_PROCESSING_METHOD = new Key("android.jpeg.gpsProcessingMethod", String.class); /** *

Time GPS fix was made to include in * EXIF.

*

Units: UTC in seconds since January 1, 1970

*

This key is available on all devices.

* @hide */ public static final Key JPEG_GPS_TIMESTAMP = new Key("android.jpeg.gpsTimestamp", long.class); /** *

The orientation for a JPEG image.

*

The clockwise rotation angle in degrees, relative to the orientation * to the camera, that the JPEG picture needs to be rotated by, to be viewed * upright.

*

Camera devices may either encode this value into the JPEG EXIF header, or * rotate the image data to match this orientation. When the image data is rotated, * the thumbnail data will also be rotated.

*

Note that this orientation is relative to the orientation of the camera sensor, given * by {@link CameraCharacteristics#SENSOR_ORIENTATION android.sensor.orientation}.

*

To translate from the device orientation given by the Android sensor APIs, the following * sample code may be used:

*
private int getJpegOrientation(CameraCharacteristics c, int deviceOrientation) {
     *     if (deviceOrientation == android.view.OrientationEventListener.ORIENTATION_UNKNOWN) return 0;
     *     int sensorOrientation = c.get(CameraCharacteristics.SENSOR_ORIENTATION);
     *
     *     // Round device orientation to a multiple of 90
     *     deviceOrientation = (deviceOrientation + 45) / 90 * 90;
     *
     *     // Reverse device orientation for front-facing cameras
     *     boolean facingFront = c.get(CameraCharacteristics.LENS_FACING) == CameraCharacteristics.LENS_FACING_FRONT;
     *     if (facingFront) deviceOrientation = -deviceOrientation;
     *
     *     // Calculate desired JPEG orientation relative to camera orientation to make
     *     // the image upright relative to the device orientation
     *     int jpegOrientation = (sensorOrientation + deviceOrientation + 360) % 360;
     *
     *     return jpegOrientation;
     * }
     * 
*

Units: Degrees in multiples of 90

*

Range of valid values:
* 0, 90, 180, 270

*

This key is available on all devices.

* * @see CameraCharacteristics#SENSOR_ORIENTATION */ @PublicKey public static final Key JPEG_ORIENTATION = new Key("android.jpeg.orientation", int.class); /** *

Compression quality of the final JPEG * image.

*

85-95 is typical usage range.

*

Range of valid values:
* 1-100; larger is higher quality

*

This key is available on all devices.

*/ @PublicKey public static final Key JPEG_QUALITY = new Key("android.jpeg.quality", byte.class); /** *

Compression quality of JPEG * thumbnail.

*

Range of valid values:
* 1-100; larger is higher quality

*

This key is available on all devices.

*/ @PublicKey public static final Key JPEG_THUMBNAIL_QUALITY = new Key("android.jpeg.thumbnailQuality", byte.class); /** *

Resolution of embedded JPEG thumbnail.

*

When set to (0, 0) value, the JPEG EXIF will not contain thumbnail, * but the captured JPEG will still be a valid image.

*

For best results, when issuing a request for a JPEG image, the thumbnail size selected * should have the same aspect ratio as the main JPEG output.

*

If the thumbnail image aspect ratio differs from the JPEG primary image aspect * ratio, the camera device creates the thumbnail by cropping it from the primary image. * For example, if the primary image has 4:3 aspect ratio, the thumbnail image has * 16:9 aspect ratio, the primary image will be cropped vertically (letterbox) to * generate the thumbnail image. The thumbnail image will always have a smaller Field * Of View (FOV) than the primary image when aspect ratios differ.

*

When an {@link CaptureRequest#JPEG_ORIENTATION android.jpeg.orientation} of non-zero degree is requested, * the camera device will handle thumbnail rotation in one of the following ways:

*
    *
  • Set the {@link android.media.ExifInterface#TAG_ORIENTATION EXIF orientation flag} * and keep jpeg and thumbnail image data unrotated.
  • *
  • Rotate the jpeg and thumbnail image data and not set * {@link android.media.ExifInterface#TAG_ORIENTATION EXIF orientation flag}. In this * case, LIMITED or FULL hardware level devices will report rotated thumnail size in * capture result, so the width and height will be interchanged if 90 or 270 degree * orientation is requested. LEGACY device will always report unrotated thumbnail * size.
  • *
*

Range of valid values:
* {@link CameraCharacteristics#JPEG_AVAILABLE_THUMBNAIL_SIZES android.jpeg.availableThumbnailSizes}

*

This key is available on all devices.

* * @see CameraCharacteristics#JPEG_AVAILABLE_THUMBNAIL_SIZES * @see CaptureRequest#JPEG_ORIENTATION */ @PublicKey public static final Key JPEG_THUMBNAIL_SIZE = new Key("android.jpeg.thumbnailSize", android.util.Size.class); /** *

The desired lens aperture size, as a ratio of lens focal length to the * effective aperture diameter.

*

Setting this value is only supported on the camera devices that have a variable * aperture lens.

*

When this is supported and {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is OFF, * this can be set along with {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime}, * {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}, and {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} * to achieve manual exposure control.

*

The requested aperture value may take several frames to reach the * requested value; the camera device will report the current (intermediate) * aperture size in capture result metadata while the aperture is changing. * While the aperture is still changing, {@link CaptureResult#LENS_STATE android.lens.state} will be set to MOVING.

*

When this is supported and {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} is one of * the ON modes, this will be overridden by the camera device * auto-exposure algorithm, the overridden values are then provided * back to the user in the corresponding result.

*

Units: The f-number (f/N)

*

Range of valid values:
* {@link CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES android.lens.info.availableApertures}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES * @see CaptureResult#LENS_STATE * @see CaptureRequest#SENSOR_EXPOSURE_TIME * @see CaptureRequest#SENSOR_FRAME_DURATION * @see CaptureRequest#SENSOR_SENSITIVITY */ @PublicKey public static final Key LENS_APERTURE = new Key("android.lens.aperture", float.class); /** *

The desired setting for the lens neutral density filter(s).

*

This control will not be supported on most camera devices.

*

Lens filters are typically used to lower the amount of light the * sensor is exposed to (measured in steps of EV). As used here, an EV * step is the standard logarithmic representation, which are * non-negative, and inversely proportional to the amount of light * hitting the sensor. For example, setting this to 0 would result * in no reduction of the incoming light, and setting this to 2 would * mean that the filter is set to reduce incoming light by two stops * (allowing 1/4 of the prior amount of light to the sensor).

*

It may take several frames before the lens filter density changes * to the requested value. While the filter density is still changing, * {@link CaptureResult#LENS_STATE android.lens.state} will be set to MOVING.

*

Units: Exposure Value (EV)

*

Range of valid values:
* {@link CameraCharacteristics#LENS_INFO_AVAILABLE_FILTER_DENSITIES android.lens.info.availableFilterDensities}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#LENS_INFO_AVAILABLE_FILTER_DENSITIES * @see CaptureResult#LENS_STATE */ @PublicKey public static final Key LENS_FILTER_DENSITY = new Key("android.lens.filterDensity", float.class); /** *

The desired lens focal length; used for optical zoom.

*

This setting controls the physical focal length of the camera * device's lens. Changing the focal length changes the field of * view of the camera device, and is usually used for optical zoom.

*

Like {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance} and {@link CaptureRequest#LENS_APERTURE android.lens.aperture}, this * setting won't be applied instantaneously, and it may take several * frames before the lens can change to the requested focal length. * While the focal length is still changing, {@link CaptureResult#LENS_STATE android.lens.state} will * be set to MOVING.

*

Optical zoom will not be supported on most devices.

*

Units: Millimeters

*

Range of valid values:
* {@link CameraCharacteristics#LENS_INFO_AVAILABLE_FOCAL_LENGTHS android.lens.info.availableFocalLengths}

*

This key is available on all devices.

* * @see CaptureRequest#LENS_APERTURE * @see CaptureRequest#LENS_FOCUS_DISTANCE * @see CameraCharacteristics#LENS_INFO_AVAILABLE_FOCAL_LENGTHS * @see CaptureResult#LENS_STATE */ @PublicKey public static final Key LENS_FOCAL_LENGTH = new Key("android.lens.focalLength", float.class); /** *

Desired distance to plane of sharpest focus, * measured from frontmost surface of the lens.

*

Should be zero for fixed-focus cameras

*

Units: See {@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} for details

*

Range of valid values:
* >= 0

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION */ @PublicKey public static final Key LENS_FOCUS_DISTANCE = new Key("android.lens.focusDistance", float.class); /** *

The range of scene distances that are in * sharp focus (depth of field).

*

If variable focus not supported, can still report * fixed depth of field range

*

Units: A pair of focus distances in diopters: (near, * far); see {@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} for details.

*

Range of valid values:
* >=0

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION */ @PublicKey public static final Key> LENS_FOCUS_RANGE = new Key>("android.lens.focusRange", new TypeReference>() {{ }}); /** *

Sets whether the camera device uses optical image stabilization (OIS) * when capturing images.

*

OIS is used to compensate for motion blur due to small * movements of the camera during capture. Unlike digital image * stabilization ({@link CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE android.control.videoStabilizationMode}), OIS * makes use of mechanical elements to stabilize the camera * sensor, and thus allows for longer exposure times before * camera shake becomes apparent.

*

Switching between different optical stabilization modes may take several * frames to initialize, the camera device will report the current mode in * capture result metadata. For example, When "ON" mode is requested, the * optical stabilization modes in the first several capture results may still * be "OFF", and it will become "ON" when the initialization is done.

*

If a camera device supports both OIS and digital image stabilization * ({@link CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE android.control.videoStabilizationMode}), turning both modes on may produce undesirable * interaction, so it is recommended not to enable both at the same time.

*

Not all devices will support OIS; see * {@link CameraCharacteristics#LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION android.lens.info.availableOpticalStabilization} for * available controls.

*

Possible values: *

    *
  • {@link #LENS_OPTICAL_STABILIZATION_MODE_OFF OFF}
  • *
  • {@link #LENS_OPTICAL_STABILIZATION_MODE_ON ON}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION android.lens.info.availableOpticalStabilization}

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION * @see #LENS_OPTICAL_STABILIZATION_MODE_OFF * @see #LENS_OPTICAL_STABILIZATION_MODE_ON */ @PublicKey public static final Key LENS_OPTICAL_STABILIZATION_MODE = new Key("android.lens.opticalStabilizationMode", int.class); /** *

Current lens status.

*

For lens parameters {@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength}, {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance}, * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} and {@link CaptureRequest#LENS_APERTURE android.lens.aperture}, when changes are requested, * they may take several frames to reach the requested values. This state indicates * the current status of the lens parameters.

*

When the state is STATIONARY, the lens parameters are not changing. This could be * either because the parameters are all fixed, or because the lens has had enough * time to reach the most recently-requested values. * If all these lens parameters are not changable for a camera device, as listed below:

*
    *
  • Fixed focus ({@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance} == 0), which means * {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance} parameter will always be 0.
  • *
  • Fixed focal length ({@link CameraCharacteristics#LENS_INFO_AVAILABLE_FOCAL_LENGTHS android.lens.info.availableFocalLengths} contains single value), * which means the optical zoom is not supported.
  • *
  • No ND filter ({@link CameraCharacteristics#LENS_INFO_AVAILABLE_FILTER_DENSITIES android.lens.info.availableFilterDensities} contains only 0).
  • *
  • Fixed aperture ({@link CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES android.lens.info.availableApertures} contains single value).
  • *
*

Then this state will always be STATIONARY.

*

When the state is MOVING, it indicates that at least one of the lens parameters * is changing.

*

Possible values: *

    *
  • {@link #LENS_STATE_STATIONARY STATIONARY}
  • *
  • {@link #LENS_STATE_MOVING MOVING}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CaptureRequest#LENS_APERTURE * @see CaptureRequest#LENS_FILTER_DENSITY * @see CaptureRequest#LENS_FOCAL_LENGTH * @see CaptureRequest#LENS_FOCUS_DISTANCE * @see CameraCharacteristics#LENS_INFO_AVAILABLE_APERTURES * @see CameraCharacteristics#LENS_INFO_AVAILABLE_FILTER_DENSITIES * @see CameraCharacteristics#LENS_INFO_AVAILABLE_FOCAL_LENGTHS * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE * @see #LENS_STATE_STATIONARY * @see #LENS_STATE_MOVING */ @PublicKey public static final Key LENS_STATE = new Key("android.lens.state", int.class); /** *

The orientation of the camera relative to the sensor * coordinate system.

*

The four coefficients that describe the quaternion * rotation from the Android sensor coordinate system to a * camera-aligned coordinate system where the X-axis is * aligned with the long side of the image sensor, the Y-axis * is aligned with the short side of the image sensor, and * the Z-axis is aligned with the optical axis of the sensor.

*

To convert from the quaternion coefficients (x,y,z,w) * to the axis of rotation (a_x, a_y, a_z) and rotation * amount theta, the following formulas can be used:

*
 theta = 2 * acos(w)
     * a_x = x / sin(theta/2)
     * a_y = y / sin(theta/2)
     * a_z = z / sin(theta/2)
     * 
*

To create a 3x3 rotation matrix that applies the rotation * defined by this quaternion, the following matrix can be * used:

*
R = [ 1 - 2y^2 - 2z^2,       2xy - 2zw,       2xz + 2yw,
     *            2xy + 2zw, 1 - 2x^2 - 2z^2,       2yz - 2xw,
     *            2xz - 2yw,       2yz + 2xw, 1 - 2x^2 - 2y^2 ]
     * 
*

This matrix can then be used to apply the rotation to a * column vector point with

*

p' = Rp

*

where p is in the device sensor coordinate system, and * p' is in the camera-oriented coordinate system.

*

Units: * Quaternion coefficients

*

Optional - This value may be {@code null} on some devices.

*/ @PublicKey public static final Key LENS_POSE_ROTATION = new Key("android.lens.poseRotation", float[].class); /** *

Position of the camera optical center.

*

The position of the camera device's lens optical center, * as a three-dimensional vector (x,y,z), relative to the * optical center of the largest camera device facing in the * same direction as this camera, in the {@link android.hardware.SensorEvent Android sensor coordinate * axes}. Note that only the axis definitions are shared with * the sensor coordinate system, but not the origin.

*

If this device is the largest or only camera device with a * given facing, then this position will be (0, 0, 0); a * camera device with a lens optical center located 3 cm from * the main sensor along the +X axis (to the right from the * user's perspective) will report (0.03, 0, 0).

*

To transform a pixel coordinates between two cameras * facing the same direction, first the source camera * {@link CameraCharacteristics#LENS_RADIAL_DISTORTION android.lens.radialDistortion} must be corrected for. Then * the source camera {@link CameraCharacteristics#LENS_INTRINSIC_CALIBRATION android.lens.intrinsicCalibration} needs * to be applied, followed by the {@link CameraCharacteristics#LENS_POSE_ROTATION android.lens.poseRotation} * of the source camera, the translation of the source camera * relative to the destination camera, the * {@link CameraCharacteristics#LENS_POSE_ROTATION android.lens.poseRotation} of the destination camera, and * finally the inverse of {@link CameraCharacteristics#LENS_INTRINSIC_CALIBRATION android.lens.intrinsicCalibration} * of the destination camera. This obtains a * radial-distortion-free coordinate in the destination * camera pixel coordinates.

*

To compare this against a real image from the destination * camera, the destination camera image then needs to be * corrected for radial distortion before comparison or * sampling.

*

Units: Meters

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#LENS_INTRINSIC_CALIBRATION * @see CameraCharacteristics#LENS_POSE_ROTATION * @see CameraCharacteristics#LENS_RADIAL_DISTORTION */ @PublicKey public static final Key LENS_POSE_TRANSLATION = new Key("android.lens.poseTranslation", float[].class); /** *

The parameters for this camera device's intrinsic * calibration.

*

The five calibration parameters that describe the * transform from camera-centric 3D coordinates to sensor * pixel coordinates:

*
[f_x, f_y, c_x, c_y, s]
     * 
*

Where f_x and f_y are the horizontal and vertical * focal lengths, [c_x, c_y] is the position of the optical * axis, and s is a skew parameter for the sensor plane not * being aligned with the lens plane.

*

These are typically used within a transformation matrix K:

*
K = [ f_x,   s, c_x,
     *        0, f_y, c_y,
     *        0    0,   1 ]
     * 
*

which can then be combined with the camera pose rotation * R and translation t ({@link CameraCharacteristics#LENS_POSE_ROTATION android.lens.poseRotation} and * {@link CameraCharacteristics#LENS_POSE_TRANSLATION android.lens.poseTranslation}, respective) to calculate the * complete transform from world coordinates to pixel * coordinates:

*
P = [ K 0   * [ R t
     *      0 1 ]     0 1 ]
     * 
*

and with p_w being a point in the world coordinate system * and p_s being a point in the camera active pixel array * coordinate system, and with the mapping including the * homogeneous division by z:

*
 p_h = (x_h, y_h, z_h) = P p_w
     * p_s = p_h / z_h
     * 
*

so [x_s, y_s] is the pixel coordinates of the world * point, z_s = 1, and w_s is a measurement of disparity * (depth) in pixel coordinates.

*

Note that the coordinate system for this transform is the * {@link CameraCharacteristics#SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE android.sensor.info.preCorrectionActiveArraySize} system, * where (0,0) is the top-left of the * preCorrectionActiveArraySize rectangle. Once the pose and * intrinsic calibration transforms have been applied to a * world point, then the {@link CameraCharacteristics#LENS_RADIAL_DISTORTION android.lens.radialDistortion} * transform needs to be applied, and the result adjusted to * be in the {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} coordinate * system (where (0, 0) is the top-left of the * activeArraySize rectangle), to determine the final pixel * coordinate of the world point for processed (non-RAW) * output buffers.

*

Units: * Pixels in the * {@link CameraCharacteristics#SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE android.sensor.info.preCorrectionActiveArraySize} * coordinate system.

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#LENS_POSE_ROTATION * @see CameraCharacteristics#LENS_POSE_TRANSLATION * @see CameraCharacteristics#LENS_RADIAL_DISTORTION * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE * @see CameraCharacteristics#SENSOR_INFO_PRE_CORRECTION_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key LENS_INTRINSIC_CALIBRATION = new Key("android.lens.intrinsicCalibration", float[].class); /** *

The correction coefficients to correct for this camera device's * radial and tangential lens distortion.

*

Four radial distortion coefficients [kappa_0, kappa_1, kappa_2, * kappa_3] and two tangential distortion coefficients * [kappa_4, kappa_5] that can be used to correct the * lens's geometric distortion with the mapping equations:

*
 x_c = x_i * ( kappa_0 + kappa_1 * r^2 + kappa_2 * r^4 + kappa_3 * r^6 ) +
     *        kappa_4 * (2 * x_i * y_i) + kappa_5 * ( r^2 + 2 * x_i^2 )
     *  y_c = y_i * ( kappa_0 + kappa_1 * r^2 + kappa_2 * r^4 + kappa_3 * r^6 ) +
     *        kappa_5 * (2 * x_i * y_i) + kappa_4 * ( r^2 + 2 * y_i^2 )
     * 
*

Here, [x_c, y_c] are the coordinates to sample in the * input image that correspond to the pixel values in the * corrected image at the coordinate [x_i, y_i]:

*
 correctedImage(x_i, y_i) = sample_at(x_c, y_c, inputImage)
     * 
*

The pixel coordinates are defined in a normalized * coordinate system related to the * {@link CameraCharacteristics#LENS_INTRINSIC_CALIBRATION android.lens.intrinsicCalibration} calibration fields. * Both [x_i, y_i] and [x_c, y_c] have (0,0) at the * lens optical center [c_x, c_y]. The maximum magnitudes * of both x and y coordinates are normalized to be 1 at the * edge further from the optical center, so the range * for both dimensions is -1 <= x <= 1.

*

Finally, r represents the radial distance from the * optical center, r^2 = x_i^2 + y_i^2, and its magnitude * is therefore no larger than |r| <= sqrt(2).

*

The distortion model used is the Brown-Conrady model.

*

Units: * Unitless coefficients.

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#LENS_INTRINSIC_CALIBRATION */ @PublicKey public static final Key LENS_RADIAL_DISTORTION = new Key("android.lens.radialDistortion", float[].class); /** *

Mode of operation for the noise reduction algorithm.

*

The noise reduction algorithm attempts to improve image quality by removing * excessive noise added by the capture process, especially in dark conditions.

*

OFF means no noise reduction will be applied by the camera device, for both raw and * YUV domain.

*

MINIMAL means that only sensor raw domain basic noise reduction is enabled ,to remove * demosaicing or other processing artifacts. For YUV_REPROCESSING, MINIMAL is same as OFF. * This mode is optional, may not be support by all devices. The application should check * {@link CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES android.noiseReduction.availableNoiseReductionModes} before using it.

*

FAST/HIGH_QUALITY both mean camera device determined noise filtering * will be applied. HIGH_QUALITY mode indicates that the camera device * will use the highest-quality noise filtering algorithms, * even if it slows down capture rate. FAST means the camera device will not * slow down capture rate when applying noise filtering. FAST may be the same as MINIMAL if * MINIMAL is listed, or the same as OFF if any noise filtering will slow down capture rate. * Every output stream will have a similar amount of enhancement applied.

*

ZERO_SHUTTER_LAG is meant to be used by applications that maintain a continuous circular * buffer of high-resolution images during preview and reprocess image(s) from that buffer * into a final capture when triggered by the user. In this mode, the camera device applies * noise reduction to low-resolution streams (below maximum recording resolution) to maximize * preview quality, but does not apply noise reduction to high-resolution streams, since * those will be reprocessed later if necessary.

*

For YUV_REPROCESSING, these FAST/HIGH_QUALITY modes both mean that the camera device * will apply FAST/HIGH_QUALITY YUV domain noise reduction, respectively. The camera device * may adjust the noise reduction parameters for best image quality based on the * {@link CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR android.reprocess.effectiveExposureFactor} if it is set.

*

Possible values: *

    *
  • {@link #NOISE_REDUCTION_MODE_OFF OFF}
  • *
  • {@link #NOISE_REDUCTION_MODE_FAST FAST}
  • *
  • {@link #NOISE_REDUCTION_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *
  • {@link #NOISE_REDUCTION_MODE_MINIMAL MINIMAL}
  • *
  • {@link #NOISE_REDUCTION_MODE_ZERO_SHUTTER_LAG ZERO_SHUTTER_LAG}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES android.noiseReduction.availableNoiseReductionModes}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES * @see CaptureRequest#REPROCESS_EFFECTIVE_EXPOSURE_FACTOR * @see #NOISE_REDUCTION_MODE_OFF * @see #NOISE_REDUCTION_MODE_FAST * @see #NOISE_REDUCTION_MODE_HIGH_QUALITY * @see #NOISE_REDUCTION_MODE_MINIMAL * @see #NOISE_REDUCTION_MODE_ZERO_SHUTTER_LAG */ @PublicKey public static final Key NOISE_REDUCTION_MODE = new Key("android.noiseReduction.mode", int.class); /** *

Whether a result given to the framework is the * final one for the capture, or only a partial that contains a * subset of the full set of dynamic metadata * values.

*

The entries in the result metadata buffers for a * single capture may not overlap, except for this entry. The * FINAL buffers must retain FIFO ordering relative to the * requests that generate them, so the FINAL buffer for frame 3 must * always be sent to the framework after the FINAL buffer for frame 2, and * before the FINAL buffer for frame 4. PARTIAL buffers may be returned * in any order relative to other frames, but all PARTIAL buffers for a given * capture must arrive before the FINAL buffer for that capture. This entry may * only be used by the camera device if quirks.usePartialResult is set to 1.

*

Range of valid values:
* Optional. Default value is FINAL.

*

Optional - This value may be {@code null} on some devices.

* @deprecated * @hide */ @Deprecated public static final Key QUIRKS_PARTIAL_RESULT = new Key("android.quirks.partialResult", boolean.class); /** *

A frame counter set by the framework. This value monotonically * increases with every new result (that is, each new result has a unique * frameCount value).

*

Reset on release()

*

Units: count of frames

*

Range of valid values:
* > 0

*

Optional - This value may be {@code null} on some devices.

* @deprecated * @hide */ @Deprecated public static final Key REQUEST_FRAME_COUNT = new Key("android.request.frameCount", int.class); /** *

An application-specified ID for the current * request. Must be maintained unchanged in output * frame

*

Units: arbitrary integer assigned by application

*

Range of valid values:
* Any int

*

Optional - This value may be {@code null} on some devices.

* @hide */ public static final Key REQUEST_ID = new Key("android.request.id", int.class); /** *

Specifies the number of pipeline stages the frame went * through from when it was exposed to when the final completed result * was available to the framework.

*

Depending on what settings are used in the request, and * what streams are configured, the data may undergo less processing, * and some pipeline stages skipped.

*

See {@link CameraCharacteristics#REQUEST_PIPELINE_MAX_DEPTH android.request.pipelineMaxDepth} for more details.

*

Range of valid values:
* <= {@link CameraCharacteristics#REQUEST_PIPELINE_MAX_DEPTH android.request.pipelineMaxDepth}

*

This key is available on all devices.

* * @see CameraCharacteristics#REQUEST_PIPELINE_MAX_DEPTH */ @PublicKey public static final Key REQUEST_PIPELINE_DEPTH = new Key("android.request.pipelineDepth", byte.class); /** *

The desired region of the sensor to read out for this capture.

*

This control can be used to implement digital zoom.

*

The crop region coordinate system is based off * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}, with (0, 0) being the * top-left corner of the sensor active array.

*

Output streams use this rectangle to produce their output, * cropping to a smaller region if necessary to maintain the * stream's aspect ratio, then scaling the sensor input to * match the output's configured resolution.

*

The crop region is applied after the RAW to other color * space (e.g. YUV) conversion. Since raw streams * (e.g. RAW16) don't have the conversion stage, they are not * croppable. The crop region will be ignored by raw streams.

*

For non-raw streams, any additional per-stream cropping will * be done to maximize the final pixel area of the stream.

*

For example, if the crop region is set to a 4:3 aspect * ratio, then 4:3 streams will use the exact crop * region. 16:9 streams will further crop vertically * (letterbox).

*

Conversely, if the crop region is set to a 16:9, then 4:3 * outputs will crop horizontally (pillarbox), and 16:9 * streams will match exactly. These additional crops will * be centered within the crop region.

*

The width and height of the crop region cannot * be set to be smaller than * floor( activeArraySize.width / {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom} ) and * floor( activeArraySize.height / {@link CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM android.scaler.availableMaxDigitalZoom} ), respectively.

*

The camera device may adjust the crop region to account * for rounding and other hardware requirements; the final * crop region used will be included in the output capture * result.

*

Units: Pixel coordinates relative to * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}

*

This key is available on all devices.

* * @see CameraCharacteristics#SCALER_AVAILABLE_MAX_DIGITAL_ZOOM * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key SCALER_CROP_REGION = new Key("android.scaler.cropRegion", android.graphics.Rect.class); /** *

Duration each pixel is exposed to * light.

*

If the sensor can't expose this exact duration, it will shorten the * duration exposed to the nearest possible value (rather than expose longer). * The final exposure time used will be available in the output capture result.

*

This control is only effective if {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} or {@link CaptureRequest#CONTROL_MODE android.control.mode} is set to * OFF; otherwise the auto-exposure algorithm will override this value.

*

Units: Nanoseconds

*

Range of valid values:
* {@link CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE android.sensor.info.exposureTimeRange}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE */ @PublicKey public static final Key SENSOR_EXPOSURE_TIME = new Key("android.sensor.exposureTime", long.class); /** *

Duration from start of frame exposure to * start of next frame exposure.

*

The maximum frame rate that can be supported by a camera subsystem is * a function of many factors:

*
    *
  • Requested resolutions of output image streams
  • *
  • Availability of binning / skipping modes on the imager
  • *
  • The bandwidth of the imager interface
  • *
  • The bandwidth of the various ISP processing blocks
  • *
*

Since these factors can vary greatly between different ISPs and * sensors, the camera abstraction tries to represent the bandwidth * restrictions with as simple a model as possible.

*

The model presented has the following characteristics:

*
    *
  • The image sensor is always configured to output the smallest * resolution possible given the application's requested output stream * sizes. The smallest resolution is defined as being at least as large * as the largest requested output stream size; the camera pipeline must * never digitally upsample sensor data when the crop region covers the * whole sensor. In general, this means that if only small output stream * resolutions are configured, the sensor can provide a higher frame * rate.
  • *
  • Since any request may use any or all the currently configured * output streams, the sensor and ISP must be configured to support * scaling a single capture to all the streams at the same time. This * means the camera pipeline must be ready to produce the largest * requested output size without any delay. Therefore, the overall * frame rate of a given configured stream set is governed only by the * largest requested stream resolution.
  • *
  • Using more than one output stream in a request does not affect the * frame duration.
  • *
  • Certain format-streams may need to do additional background processing * before data is consumed/produced by that stream. These processors * can run concurrently to the rest of the camera pipeline, but * cannot process more than 1 capture at a time.
  • *
*

The necessary information for the application, given the model above, * is provided via the {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap} field using * {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputMinFrameDuration }. * These are used to determine the maximum frame rate / minimum frame * duration that is possible for a given stream configuration.

*

Specifically, the application can use the following rules to * determine the minimum frame duration it can request from the camera * device:

*
    *
  1. Let the set of currently configured input/output streams * be called S.
  2. *
  3. Find the minimum frame durations for each stream in S, by looking * it up in {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap} using {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputMinFrameDuration } * (with its respective size/format). Let this set of frame durations be * called F.
  4. *
  5. For any given request R, the minimum frame duration allowed * for R is the maximum out of all values in F. Let the streams * used in R be called S_r.
  6. *
*

If none of the streams in S_r have a stall time (listed in {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputStallDuration } * using its respective size/format), then the frame duration in F * determines the steady state frame rate that the application will get * if it uses R as a repeating request. Let this special kind of * request be called Rsimple.

*

A repeating request Rsimple can be occasionally interleaved * by a single capture of a new request Rstall (which has at least * one in-use stream with a non-0 stall time) and if Rstall has the * same minimum frame duration this will not cause a frame rate loss * if all buffers from the previous Rstall have already been * delivered.

*

For more details about stalling, see * {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputStallDuration }.

*

This control is only effective if {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} or {@link CaptureRequest#CONTROL_MODE android.control.mode} is set to * OFF; otherwise the auto-exposure algorithm will override this value.

*

Units: Nanoseconds

*

Range of valid values:
* See {@link CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION android.sensor.info.maxFrameDuration}, * {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap}. The duration * is capped to max(duration, exposureTime + overhead).

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP * @see CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION */ @PublicKey public static final Key SENSOR_FRAME_DURATION = new Key("android.sensor.frameDuration", long.class); /** *

The amount of gain applied to sensor data * before processing.

*

The sensitivity is the standard ISO sensitivity value, * as defined in ISO 12232:2006.

*

The sensitivity must be within {@link CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE android.sensor.info.sensitivityRange}, and * if if it less than {@link CameraCharacteristics#SENSOR_MAX_ANALOG_SENSITIVITY android.sensor.maxAnalogSensitivity}, the camera device * is guaranteed to use only analog amplification for applying the gain.

*

If the camera device cannot apply the exact sensitivity * requested, it will reduce the gain to the nearest supported * value. The final sensitivity used will be available in the * output capture result.

*

This control is only effective if {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} or {@link CaptureRequest#CONTROL_MODE android.control.mode} is set to * OFF; otherwise the auto-exposure algorithm will override this value.

*

Units: ISO arithmetic units

*

Range of valid values:
* {@link CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE android.sensor.info.sensitivityRange}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SENSOR_INFO_SENSITIVITY_RANGE * @see CameraCharacteristics#SENSOR_MAX_ANALOG_SENSITIVITY */ @PublicKey public static final Key SENSOR_SENSITIVITY = new Key("android.sensor.sensitivity", int.class); /** *

Time at start of exposure of first * row of the image sensor active array, in nanoseconds.

*

The timestamps are also included in all image * buffers produced for the same capture, and will be identical * on all the outputs.

*

When {@link CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE android.sensor.info.timestampSource} == UNKNOWN, * the timestamps measure time since an unspecified starting point, * and are monotonically increasing. They can be compared with the * timestamps for other captures from the same camera device, but are * not guaranteed to be comparable to any other time source.

*

When {@link CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE android.sensor.info.timestampSource} == REALTIME, the * timestamps measure time in the same timebase as {@link android.os.SystemClock#elapsedRealtimeNanos }, and they can * be compared to other timestamps from other subsystems that * are using that base.

*

For reprocessing, the timestamp will match the start of exposure of * the input image, i.e. {@link CaptureResult#SENSOR_TIMESTAMP the * timestamp} in the TotalCaptureResult that was used to create the * reprocess capture request.

*

Units: Nanoseconds

*

Range of valid values:
* > 0

*

This key is available on all devices.

* * @see CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE */ @PublicKey public static final Key SENSOR_TIMESTAMP = new Key("android.sensor.timestamp", long.class); /** *

The estimated camera neutral color in the native sensor colorspace at * the time of capture.

*

This value gives the neutral color point encoded as an RGB value in the * native sensor color space. The neutral color point indicates the * currently estimated white point of the scene illumination. It can be * used to interpolate between the provided color transforms when * processing raw sensor data.

*

The order of the values is R, G, B; where R is in the lowest index.

*

Optional - This value may be {@code null} on some devices.

*/ @PublicKey public static final Key SENSOR_NEUTRAL_COLOR_POINT = new Key("android.sensor.neutralColorPoint", Rational[].class); /** *

Noise model coefficients for each CFA mosaic channel.

*

This key contains two noise model coefficients for each CFA channel * corresponding to the sensor amplification (S) and sensor readout * noise (O). These are given as pairs of coefficients for each channel * in the same order as channels listed for the CFA layout key * (see {@link CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT android.sensor.info.colorFilterArrangement}). This is * represented as an array of Pair<Double, Double>, where * the first member of the Pair at index n is the S coefficient and the * second member is the O coefficient for the nth color channel in the CFA.

*

These coefficients are used in a two parameter noise model to describe * the amount of noise present in the image for each CFA channel. The * noise model used here is:

*

N(x) = sqrt(Sx + O)

*

Where x represents the recorded signal of a CFA channel normalized to * the range [0, 1], and S and O are the noise model coeffiecients for * that channel.

*

A more detailed description of the noise model can be found in the * Adobe DNG specification for the NoiseProfile tag.

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT */ @PublicKey public static final Key[]> SENSOR_NOISE_PROFILE = new Key[]>("android.sensor.noiseProfile", new TypeReference[]>() {{ }}); /** *

The worst-case divergence between Bayer green channels.

*

This value is an estimate of the worst case split between the * Bayer green channels in the red and blue rows in the sensor color * filter array.

*

The green split is calculated as follows:

*
    *
  1. A 5x5 pixel (or larger) window W within the active sensor array is * chosen. The term 'pixel' here is taken to mean a group of 4 Bayer * mosaic channels (R, Gr, Gb, B). The location and size of the window * chosen is implementation defined, and should be chosen to provide a * green split estimate that is both representative of the entire image * for this camera sensor, and can be calculated quickly.
  2. *
  3. The arithmetic mean of the green channels from the red * rows (mean_Gr) within W is computed.
  4. *
  5. The arithmetic mean of the green channels from the blue * rows (mean_Gb) within W is computed.
  6. *
  7. The maximum ratio R of the two means is computed as follows: * R = max((mean_Gr + 1)/(mean_Gb + 1), (mean_Gb + 1)/(mean_Gr + 1))
  8. *
*

The ratio R is the green split divergence reported for this property, * which represents how much the green channels differ in the mosaic * pattern. This value is typically used to determine the treatment of * the green mosaic channels when demosaicing.

*

The green split value can be roughly interpreted as follows:

*
    *
  • R < 1.03 is a negligible split (<3% divergence).
  • *
  • 1.20 <= R >= 1.03 will require some software * correction to avoid demosaic errors (3-20% divergence).
  • *
  • R > 1.20 will require strong software correction to produce * a usuable image (>20% divergence).
  • *
*

Range of valid values:

*

>= 0

*

Optional - This value may be {@code null} on some devices.

*/ @PublicKey public static final Key SENSOR_GREEN_SPLIT = new Key("android.sensor.greenSplit", float.class); /** *

A pixel [R, G_even, G_odd, B] that supplies the test pattern * when {@link CaptureRequest#SENSOR_TEST_PATTERN_MODE android.sensor.testPatternMode} is SOLID_COLOR.

*

Each color channel is treated as an unsigned 32-bit integer. * The camera device then uses the most significant X bits * that correspond to how many bits are in its Bayer raw sensor * output.

*

For example, a sensor with RAW10 Bayer output would use the * 10 most significant bits from each color channel.

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE */ @PublicKey public static final Key SENSOR_TEST_PATTERN_DATA = new Key("android.sensor.testPatternData", int[].class); /** *

When enabled, the sensor sends a test pattern instead of * doing a real exposure from the camera.

*

When a test pattern is enabled, all manual sensor controls specified * by android.sensor.* will be ignored. All other controls should * work as normal.

*

For example, if manual flash is enabled, flash firing should still * occur (and that the test pattern remain unmodified, since the flash * would not actually affect it).

*

Defaults to OFF.

*

Possible values: *

    *
  • {@link #SENSOR_TEST_PATTERN_MODE_OFF OFF}
  • *
  • {@link #SENSOR_TEST_PATTERN_MODE_SOLID_COLOR SOLID_COLOR}
  • *
  • {@link #SENSOR_TEST_PATTERN_MODE_COLOR_BARS COLOR_BARS}
  • *
  • {@link #SENSOR_TEST_PATTERN_MODE_COLOR_BARS_FADE_TO_GRAY COLOR_BARS_FADE_TO_GRAY}
  • *
  • {@link #SENSOR_TEST_PATTERN_MODE_PN9 PN9}
  • *
  • {@link #SENSOR_TEST_PATTERN_MODE_CUSTOM1 CUSTOM1}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#SENSOR_AVAILABLE_TEST_PATTERN_MODES android.sensor.availableTestPatternModes}

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#SENSOR_AVAILABLE_TEST_PATTERN_MODES * @see #SENSOR_TEST_PATTERN_MODE_OFF * @see #SENSOR_TEST_PATTERN_MODE_SOLID_COLOR * @see #SENSOR_TEST_PATTERN_MODE_COLOR_BARS * @see #SENSOR_TEST_PATTERN_MODE_COLOR_BARS_FADE_TO_GRAY * @see #SENSOR_TEST_PATTERN_MODE_PN9 * @see #SENSOR_TEST_PATTERN_MODE_CUSTOM1 */ @PublicKey public static final Key SENSOR_TEST_PATTERN_MODE = new Key("android.sensor.testPatternMode", int.class); /** *

Duration between the start of first row exposure * and the start of last row exposure.

*

This is the exposure time skew between the first and last * row exposure start times. The first row and the last row are * the first and last rows inside of the * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.

*

For typical camera sensors that use rolling shutters, this is also equivalent * to the frame readout time.

*

Units: Nanoseconds

*

Range of valid values:
* >= 0 and < * {@link android.hardware.camera2.params.StreamConfigurationMap#getOutputMinFrameDuration }.

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE */ @PublicKey public static final Key SENSOR_ROLLING_SHUTTER_SKEW = new Key("android.sensor.rollingShutterSkew", long.class); /** *

A per-frame dynamic black level offset for each of the color filter * arrangement (CFA) mosaic channels.

*

Camera sensor black levels may vary dramatically for different * capture settings (e.g. {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}). The fixed black * level reported by {@link CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN android.sensor.blackLevelPattern} may be too * inaccurate to represent the actual value on a per-frame basis. The * camera device internal pipeline relies on reliable black level values * to process the raw images appropriately. To get the best image * quality, the camera device may choose to estimate the per frame black * level values either based on optically shielded black regions * ({@link CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS android.sensor.opticalBlackRegions}) or its internal model.

*

This key reports the camera device estimated per-frame zero light * value for each of the CFA mosaic channels in the camera sensor. The * {@link CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN android.sensor.blackLevelPattern} may only represent a coarse * approximation of the actual black level values. This value is the * black level used in camera device internal image processing pipeline * and generally more accurate than the fixed black level values. * However, since they are estimated values by the camera device, they * may not be as accurate as the black level values calculated from the * optical black pixels reported by {@link CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS android.sensor.opticalBlackRegions}.

*

The values are given in the same order as channels listed for the CFA * layout key (see {@link CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT android.sensor.info.colorFilterArrangement}), i.e. the * nth value given corresponds to the black level offset for the nth * color channel listed in the CFA.

*

This key will be available if {@link CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS android.sensor.opticalBlackRegions} is * available or the camera device advertises this key via * {@link android.hardware.camera2.CameraCharacteristics#getAvailableCaptureResultKeys }.

*

Range of valid values:
* >= 0 for each.

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT * @see CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS * @see CaptureRequest#SENSOR_SENSITIVITY */ @PublicKey public static final Key SENSOR_DYNAMIC_BLACK_LEVEL = new Key("android.sensor.dynamicBlackLevel", float[].class); /** *

Maximum raw value output by sensor for this frame.

*

Since the {@link CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN android.sensor.blackLevelPattern} may change for different * capture settings (e.g., {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity}), the white * level will change accordingly. This key is similar to * {@link CameraCharacteristics#SENSOR_INFO_WHITE_LEVEL android.sensor.info.whiteLevel}, but specifies the camera device * estimated white level for each frame.

*

This key will be available if {@link CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS android.sensor.opticalBlackRegions} is * available or the camera device advertises this key via * {@link android.hardware.camera2.CameraCharacteristics#getAvailableCaptureRequestKeys }.

*

Range of valid values:
* >= 0

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN * @see CameraCharacteristics#SENSOR_INFO_WHITE_LEVEL * @see CameraCharacteristics#SENSOR_OPTICAL_BLACK_REGIONS * @see CaptureRequest#SENSOR_SENSITIVITY */ @PublicKey public static final Key SENSOR_DYNAMIC_WHITE_LEVEL = new Key("android.sensor.dynamicWhiteLevel", int.class); /** *

Quality of lens shading correction applied * to the image data.

*

When set to OFF mode, no lens shading correction will be applied by the * camera device, and an identity lens shading map data will be provided * if {@link CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE android.statistics.lensShadingMapMode} == ON. For example, for lens * shading map with size of [ 4, 3 ], * the output {@link CaptureResult#STATISTICS_LENS_SHADING_CORRECTION_MAP android.statistics.lensShadingCorrectionMap} for this case will be an identity * map shown below:

*
[ 1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0,
     *  1.0, 1.0, 1.0, 1.0,  1.0, 1.0, 1.0, 1.0 ]
     * 
*

When set to other modes, lens shading correction will be applied by the camera * device. Applications can request lens shading map data by setting * {@link CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE android.statistics.lensShadingMapMode} to ON, and then the camera device will provide lens * shading map data in {@link CaptureResult#STATISTICS_LENS_SHADING_CORRECTION_MAP android.statistics.lensShadingCorrectionMap}; the returned shading map * data will be the one applied by the camera device for this capture request.

*

The shading map data may depend on the auto-exposure (AE) and AWB statistics, therefore * the reliability of the map data may be affected by the AE and AWB algorithms. When AE and * AWB are in AUTO modes({@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} != OFF and {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} != * OFF), to get best results, it is recommended that the applications wait for the AE and AWB * to be converged before using the returned shading map data.

*

Possible values: *

    *
  • {@link #SHADING_MODE_OFF OFF}
  • *
  • {@link #SHADING_MODE_FAST FAST}
  • *
  • {@link #SHADING_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#SHADING_AVAILABLE_MODES android.shading.availableModes}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_AWB_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SHADING_AVAILABLE_MODES * @see CaptureResult#STATISTICS_LENS_SHADING_CORRECTION_MAP * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE * @see #SHADING_MODE_OFF * @see #SHADING_MODE_FAST * @see #SHADING_MODE_HIGH_QUALITY */ @PublicKey public static final Key SHADING_MODE = new Key("android.shading.mode", int.class); /** *

Operating mode for the face detector * unit.

*

Whether face detection is enabled, and whether it * should output just the basic fields or the full set of * fields.

*

Possible values: *

    *
  • {@link #STATISTICS_FACE_DETECT_MODE_OFF OFF}
  • *
  • {@link #STATISTICS_FACE_DETECT_MODE_SIMPLE SIMPLE}
  • *
  • {@link #STATISTICS_FACE_DETECT_MODE_FULL FULL}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES android.statistics.info.availableFaceDetectModes}

*

This key is available on all devices.

* * @see CameraCharacteristics#STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES * @see #STATISTICS_FACE_DETECT_MODE_OFF * @see #STATISTICS_FACE_DETECT_MODE_SIMPLE * @see #STATISTICS_FACE_DETECT_MODE_FULL */ @PublicKey public static final Key STATISTICS_FACE_DETECT_MODE = new Key("android.statistics.faceDetectMode", int.class); /** *

List of unique IDs for detected faces.

*

Each detected face is given a unique ID that is valid for as long as the face is visible * to the camera device. A face that leaves the field of view and later returns may be * assigned a new ID.

*

Only available if {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} == FULL * This key is available on all devices.

* * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE * @hide */ public static final Key STATISTICS_FACE_IDS = new Key("android.statistics.faceIds", int[].class); /** *

List of landmarks for detected * faces.

*

The coordinate system is that of {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}, with * (0, 0) being the top-left pixel of the active array.

*

Only available if {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} == FULL * This key is available on all devices.

* * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE * @hide */ public static final Key STATISTICS_FACE_LANDMARKS = new Key("android.statistics.faceLandmarks", int[].class); /** *

List of the bounding rectangles for detected * faces.

*

The coordinate system is that of {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}, with * (0, 0) being the top-left pixel of the active array.

*

Only available if {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} != OFF * This key is available on all devices.

* * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE * @hide */ public static final Key STATISTICS_FACE_RECTANGLES = new Key("android.statistics.faceRectangles", android.graphics.Rect[].class); /** *

List of the face confidence scores for * detected faces

*

Only available if {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} != OFF.

*

Range of valid values:
* 1-100

*

This key is available on all devices.

* * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE * @hide */ public static final Key STATISTICS_FACE_SCORES = new Key("android.statistics.faceScores", byte[].class); /** *

List of the faces detected through camera face detection * in this capture.

*

Only available if {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} != OFF.

*

This key is available on all devices.

* * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE */ @PublicKey @SyntheticKey public static final Key STATISTICS_FACES = new Key("android.statistics.faces", android.hardware.camera2.params.Face[].class); /** *

The shading map is a low-resolution floating-point map * that lists the coefficients used to correct for vignetting, for each * Bayer color channel.

*

The map provided here is the same map that is used by the camera device to * correct both color shading and vignetting for output non-RAW images.

*

When there is no lens shading correction applied to RAW * output images ({@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied} == * false), this map is the complete lens shading correction * map; when there is some lens shading correction applied to * the RAW output image ({@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied}== true), this map reports the remaining lens shading * correction map that needs to be applied to get shading * corrected images that match the camera device's output for * non-RAW formats.

*

For a complete shading correction map, the least shaded * section of the image will have a gain factor of 1; all * other sections will have gains above 1.

*

When {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} = TRANSFORM_MATRIX, the map * will take into account the colorCorrection settings.

*

The shading map is for the entire active pixel array, and is not * affected by the crop region specified in the request. Each shading map * entry is the value of the shading compensation map over a specific * pixel on the sensor. Specifically, with a (N x M) resolution shading * map, and an active pixel array size (W x H), shading map entry * (x,y) ϵ (0 ... N-1, 0 ... M-1) is the value of the shading map at * pixel ( ((W-1)/(N-1)) * x, ((H-1)/(M-1)) * y) for the four color channels. * The map is assumed to be bilinearly interpolated between the sample points.

*

The channel order is [R, Geven, Godd, B], where Geven is the green * channel for the even rows of a Bayer pattern, and Godd is the odd rows. * The shading map is stored in a fully interleaved format.

*

The shading map will generally have on the order of 30-40 rows and columns, * and will be smaller than 64x64.

*

As an example, given a very small map defined as:

*
width,height = [ 4, 3 ]
     * values =
     * [ 1.3, 1.2, 1.15, 1.2,  1.2, 1.2, 1.15, 1.2,
     *     1.1, 1.2, 1.2, 1.2,  1.3, 1.2, 1.3, 1.3,
     *   1.2, 1.2, 1.25, 1.1,  1.1, 1.1, 1.1, 1.0,
     *     1.0, 1.0, 1.0, 1.0,  1.2, 1.3, 1.25, 1.2,
     *   1.3, 1.2, 1.2, 1.3,   1.2, 1.15, 1.1, 1.2,
     *     1.2, 1.1, 1.0, 1.2,  1.3, 1.15, 1.2, 1.3 ]
     * 
*

The low-resolution scaling map images for each channel are * (displayed using nearest-neighbor interpolation):

*

Red lens shading map * Green (even rows) lens shading map * Green (odd rows) lens shading map * Blue lens shading map

*

As a visualization only, inverting the full-color map to recover an * image of a gray wall (using bicubic interpolation for visual quality) as captured by the sensor gives:

*

Image of a uniform white wall (inverse shading map)

*

Range of valid values:
* Each gain factor is >= 1

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#COLOR_CORRECTION_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED */ @PublicKey public static final Key STATISTICS_LENS_SHADING_CORRECTION_MAP = new Key("android.statistics.lensShadingCorrectionMap", android.hardware.camera2.params.LensShadingMap.class); /** *

The shading map is a low-resolution floating-point map * that lists the coefficients used to correct for vignetting and color shading, * for each Bayer color channel of RAW image data.

*

The map provided here is the same map that is used by the camera device to * correct both color shading and vignetting for output non-RAW images.

*

When there is no lens shading correction applied to RAW * output images ({@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied} == * false), this map is the complete lens shading correction * map; when there is some lens shading correction applied to * the RAW output image ({@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied}== true), this map reports the remaining lens shading * correction map that needs to be applied to get shading * corrected images that match the camera device's output for * non-RAW formats.

*

For a complete shading correction map, the least shaded * section of the image will have a gain factor of 1; all * other sections will have gains above 1.

*

When {@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} = TRANSFORM_MATRIX, the map * will take into account the colorCorrection settings.

*

The shading map is for the entire active pixel array, and is not * affected by the crop region specified in the request. Each shading map * entry is the value of the shading compensation map over a specific * pixel on the sensor. Specifically, with a (N x M) resolution shading * map, and an active pixel array size (W x H), shading map entry * (x,y) ϵ (0 ... N-1, 0 ... M-1) is the value of the shading map at * pixel ( ((W-1)/(N-1)) * x, ((H-1)/(M-1)) * y) for the four color channels. * The map is assumed to be bilinearly interpolated between the sample points.

*

The channel order is [R, Geven, Godd, B], where Geven is the green * channel for the even rows of a Bayer pattern, and Godd is the odd rows. * The shading map is stored in a fully interleaved format, and its size * is provided in the camera static metadata by android.lens.info.shadingMapSize.

*

The shading map will generally have on the order of 30-40 rows and columns, * and will be smaller than 64x64.

*

As an example, given a very small map defined as:

*
android.lens.info.shadingMapSize = [ 4, 3 ]
     * android.statistics.lensShadingMap =
     * [ 1.3, 1.2, 1.15, 1.2,  1.2, 1.2, 1.15, 1.2,
     *     1.1, 1.2, 1.2, 1.2,  1.3, 1.2, 1.3, 1.3,
     *   1.2, 1.2, 1.25, 1.1,  1.1, 1.1, 1.1, 1.0,
     *     1.0, 1.0, 1.0, 1.0,  1.2, 1.3, 1.25, 1.2,
     *   1.3, 1.2, 1.2, 1.3,   1.2, 1.15, 1.1, 1.2,
     *     1.2, 1.1, 1.0, 1.2,  1.3, 1.15, 1.2, 1.3 ]
     * 
*

The low-resolution scaling map images for each channel are * (displayed using nearest-neighbor interpolation):

*

Red lens shading map * Green (even rows) lens shading map * Green (odd rows) lens shading map * Blue lens shading map

*

As a visualization only, inverting the full-color map to recover an * image of a gray wall (using bicubic interpolation for visual quality) * as captured by the sensor gives:

*

Image of a uniform white wall (inverse shading map)

*

Note that the RAW image data might be subject to lens shading * correction not reported on this map. Query * {@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied} to see if RAW image data has subject * to lens shading correction. If {@link CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED android.sensor.info.lensShadingApplied} * is TRUE, the RAW image data is subject to partial or full lens shading * correction. In the case full lens shading correction is applied to RAW * images, the gain factor map reported in this key will contain all 1.0 gains. * In other words, the map reported in this key is the remaining lens shading * that needs to be applied on the RAW image to get images without lens shading * artifacts. See {@link CameraCharacteristics#REQUEST_MAX_NUM_OUTPUT_RAW android.request.maxNumOutputRaw} for a list of RAW image * formats.

*

Range of valid values:
* Each gain factor is >= 1

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#COLOR_CORRECTION_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#REQUEST_MAX_NUM_OUTPUT_RAW * @see CameraCharacteristics#SENSOR_INFO_LENS_SHADING_APPLIED * @hide */ public static final Key STATISTICS_LENS_SHADING_MAP = new Key("android.statistics.lensShadingMap", float[].class); /** *

The best-fit color channel gains calculated * by the camera device's statistics units for the current output frame.

*

This may be different than the gains used for this frame, * since statistics processing on data from a new frame * typically completes after the transform has already been * applied to that frame.

*

The 4 channel gains are defined in Bayer domain, * see {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains} for details.

*

This value should always be calculated by the auto-white balance (AWB) block, * regardless of the android.control.* current values.

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#COLOR_CORRECTION_GAINS * @deprecated * @hide */ @Deprecated public static final Key STATISTICS_PREDICTED_COLOR_GAINS = new Key("android.statistics.predictedColorGains", float[].class); /** *

The best-fit color transform matrix estimate * calculated by the camera device's statistics units for the current * output frame.

*

The camera device will provide the estimate from its * statistics unit on the white balance transforms to use * for the next frame. These are the values the camera device believes * are the best fit for the current output frame. This may * be different than the transform used for this frame, since * statistics processing on data from a new frame typically * completes after the transform has already been applied to * that frame.

*

These estimates must be provided for all frames, even if * capture settings and color transforms are set by the application.

*

This value should always be calculated by the auto-white balance (AWB) block, * regardless of the android.control.* current values.

*

Optional - This value may be {@code null} on some devices.

* @deprecated * @hide */ @Deprecated public static final Key STATISTICS_PREDICTED_COLOR_TRANSFORM = new Key("android.statistics.predictedColorTransform", Rational[].class); /** *

The camera device estimated scene illumination lighting * frequency.

*

Many light sources, such as most fluorescent lights, flicker at a rate * that depends on the local utility power standards. This flicker must be * accounted for by auto-exposure routines to avoid artifacts in captured images. * The camera device uses this entry to tell the application what the scene * illuminant frequency is.

*

When manual exposure control is enabled * ({@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} == OFF or {@link CaptureRequest#CONTROL_MODE android.control.mode} == * OFF), the {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode} doesn't perform * antibanding, and the application can ensure it selects * exposure times that do not cause banding issues by looking * into this metadata field. See * {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode} for more details.

*

Reports NONE if there doesn't appear to be flickering illumination.

*

Possible values: *

    *
  • {@link #STATISTICS_SCENE_FLICKER_NONE NONE}
  • *
  • {@link #STATISTICS_SCENE_FLICKER_50HZ 50HZ}
  • *
  • {@link #STATISTICS_SCENE_FLICKER_60HZ 60HZ}
  • *

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE * @see CaptureRequest#CONTROL_AE_MODE * @see CaptureRequest#CONTROL_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #STATISTICS_SCENE_FLICKER_NONE * @see #STATISTICS_SCENE_FLICKER_50HZ * @see #STATISTICS_SCENE_FLICKER_60HZ */ @PublicKey public static final Key STATISTICS_SCENE_FLICKER = new Key("android.statistics.sceneFlicker", int.class); /** *

Operating mode for hot pixel map generation.

*

If set to true, a hot pixel map is returned in {@link CaptureResult#STATISTICS_HOT_PIXEL_MAP android.statistics.hotPixelMap}. * If set to false, no hot pixel map will be returned.

*

Range of valid values:
* {@link CameraCharacteristics#STATISTICS_INFO_AVAILABLE_HOT_PIXEL_MAP_MODES android.statistics.info.availableHotPixelMapModes}

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureResult#STATISTICS_HOT_PIXEL_MAP * @see CameraCharacteristics#STATISTICS_INFO_AVAILABLE_HOT_PIXEL_MAP_MODES */ @PublicKey public static final Key STATISTICS_HOT_PIXEL_MAP_MODE = new Key("android.statistics.hotPixelMapMode", boolean.class); /** *

List of (x, y) coordinates of hot/defective pixels on the sensor.

*

A coordinate (x, y) must lie between (0, 0), and * (width - 1, height - 1) (inclusive), which are the top-left and * bottom-right of the pixel array, respectively. The width and * height dimensions are given in {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}. * This may include hot pixels that lie outside of the active array * bounds given by {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}.

*

Range of valid values:

*

n <= number of pixels on the sensor. * The (x, y) coordinates must be bounded by * {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}.

*

Optional - This value may be {@code null} on some devices.

* * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE */ @PublicKey public static final Key STATISTICS_HOT_PIXEL_MAP = new Key("android.statistics.hotPixelMap", android.graphics.Point[].class); /** *

Whether the camera device will output the lens * shading map in output result metadata.

*

When set to ON, * android.statistics.lensShadingMap will be provided in * the output result metadata.

*

ON is always supported on devices with the RAW capability.

*

Possible values: *

    *
  • {@link #STATISTICS_LENS_SHADING_MAP_MODE_OFF OFF}
  • *
  • {@link #STATISTICS_LENS_SHADING_MAP_MODE_ON ON}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#STATISTICS_INFO_AVAILABLE_LENS_SHADING_MAP_MODES android.statistics.info.availableLensShadingMapModes}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#STATISTICS_INFO_AVAILABLE_LENS_SHADING_MAP_MODES * @see #STATISTICS_LENS_SHADING_MAP_MODE_OFF * @see #STATISTICS_LENS_SHADING_MAP_MODE_ON */ @PublicKey public static final Key STATISTICS_LENS_SHADING_MAP_MODE = new Key("android.statistics.lensShadingMapMode", int.class); /** *

Tonemapping / contrast / gamma curve for the blue * channel, to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * CONTRAST_CURVE.

*

See android.tonemap.curveRed for more details.

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CaptureRequest#TONEMAP_MODE * @hide */ public static final Key TONEMAP_CURVE_BLUE = new Key("android.tonemap.curveBlue", float[].class); /** *

Tonemapping / contrast / gamma curve for the green * channel, to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * CONTRAST_CURVE.

*

See android.tonemap.curveRed for more details.

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CaptureRequest#TONEMAP_MODE * @hide */ public static final Key TONEMAP_CURVE_GREEN = new Key("android.tonemap.curveGreen", float[].class); /** *

Tonemapping / contrast / gamma curve for the red * channel, to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * CONTRAST_CURVE.

*

Each channel's curve is defined by an array of control points:

*
android.tonemap.curveRed =
     *   [ P0in, P0out, P1in, P1out, P2in, P2out, P3in, P3out, ..., PNin, PNout ]
     * 2 <= N <= {@link CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS android.tonemap.maxCurvePoints}
*

These are sorted in order of increasing Pin; it is * required that input values 0.0 and 1.0 are included in the list to * define a complete mapping. For input values between control points, * the camera device must linearly interpolate between the control * points.

*

Each curve can have an independent number of points, and the number * of points can be less than max (that is, the request doesn't have to * always provide a curve with number of points equivalent to * {@link CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS android.tonemap.maxCurvePoints}).

*

A few examples, and their corresponding graphical mappings; these * only specify the red channel and the precision is limited to 4 * digits, for conciseness.

*

Linear mapping:

*
android.tonemap.curveRed = [ 0, 0, 1.0, 1.0 ]
     * 
*

Linear mapping curve

*

Invert mapping:

*
android.tonemap.curveRed = [ 0, 1.0, 1.0, 0 ]
     * 
*

Inverting mapping curve

*

Gamma 1/2.2 mapping, with 16 control points:

*
android.tonemap.curveRed = [
     *   0.0000, 0.0000, 0.0667, 0.2920, 0.1333, 0.4002, 0.2000, 0.4812,
     *   0.2667, 0.5484, 0.3333, 0.6069, 0.4000, 0.6594, 0.4667, 0.7072,
     *   0.5333, 0.7515, 0.6000, 0.7928, 0.6667, 0.8317, 0.7333, 0.8685,
     *   0.8000, 0.9035, 0.8667, 0.9370, 0.9333, 0.9691, 1.0000, 1.0000 ]
     * 
*

Gamma = 1/2.2 tonemapping curve

*

Standard sRGB gamma mapping, per IEC 61966-2-1:1999, with 16 control points:

*
android.tonemap.curveRed = [
     *   0.0000, 0.0000, 0.0667, 0.2864, 0.1333, 0.4007, 0.2000, 0.4845,
     *   0.2667, 0.5532, 0.3333, 0.6125, 0.4000, 0.6652, 0.4667, 0.7130,
     *   0.5333, 0.7569, 0.6000, 0.7977, 0.6667, 0.8360, 0.7333, 0.8721,
     *   0.8000, 0.9063, 0.8667, 0.9389, 0.9333, 0.9701, 1.0000, 1.0000 ]
     * 
*

sRGB tonemapping curve

*

Range of valid values:
* 0-1 on both input and output coordinates, normalized * as a floating-point value such that 0 == black and 1 == white.

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS * @see CaptureRequest#TONEMAP_MODE * @hide */ public static final Key TONEMAP_CURVE_RED = new Key("android.tonemap.curveRed", float[].class); /** *

Tonemapping / contrast / gamma curve to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} * is CONTRAST_CURVE.

*

The tonemapCurve consist of three curves for each of red, green, and blue * channels respectively. The following example uses the red channel as an * example. The same logic applies to green and blue channel. * Each channel's curve is defined by an array of control points:

*
curveRed =
     *   [ P0(in, out), P1(in, out), P2(in, out), P3(in, out), ..., PN(in, out) ]
     * 2 <= N <= {@link CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS android.tonemap.maxCurvePoints}
*

These are sorted in order of increasing Pin; it is always * guaranteed that input values 0.0 and 1.0 are included in the list to * define a complete mapping. For input values between control points, * the camera device must linearly interpolate between the control * points.

*

Each curve can have an independent number of points, and the number * of points can be less than max (that is, the request doesn't have to * always provide a curve with number of points equivalent to * {@link CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS android.tonemap.maxCurvePoints}).

*

A few examples, and their corresponding graphical mappings; these * only specify the red channel and the precision is limited to 4 * digits, for conciseness.

*

Linear mapping:

*
curveRed = [ (0, 0), (1.0, 1.0) ]
     * 
*

Linear mapping curve

*

Invert mapping:

*
curveRed = [ (0, 1.0), (1.0, 0) ]
     * 
*

Inverting mapping curve

*

Gamma 1/2.2 mapping, with 16 control points:

*
curveRed = [
     *   (0.0000, 0.0000), (0.0667, 0.2920), (0.1333, 0.4002), (0.2000, 0.4812),
     *   (0.2667, 0.5484), (0.3333, 0.6069), (0.4000, 0.6594), (0.4667, 0.7072),
     *   (0.5333, 0.7515), (0.6000, 0.7928), (0.6667, 0.8317), (0.7333, 0.8685),
     *   (0.8000, 0.9035), (0.8667, 0.9370), (0.9333, 0.9691), (1.0000, 1.0000) ]
     * 
*

Gamma = 1/2.2 tonemapping curve

*

Standard sRGB gamma mapping, per IEC 61966-2-1:1999, with 16 control points:

*
curveRed = [
     *   (0.0000, 0.0000), (0.0667, 0.2864), (0.1333, 0.4007), (0.2000, 0.4845),
     *   (0.2667, 0.5532), (0.3333, 0.6125), (0.4000, 0.6652), (0.4667, 0.7130),
     *   (0.5333, 0.7569), (0.6000, 0.7977), (0.6667, 0.8360), (0.7333, 0.8721),
     *   (0.8000, 0.9063), (0.8667, 0.9389), (0.9333, 0.9701), (1.0000, 1.0000) ]
     * 
*

sRGB tonemapping curve

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#TONEMAP_MAX_CURVE_POINTS * @see CaptureRequest#TONEMAP_MODE */ @PublicKey @SyntheticKey public static final Key TONEMAP_CURVE = new Key("android.tonemap.curve", android.hardware.camera2.params.TonemapCurve.class); /** *

High-level global contrast/gamma/tonemapping control.

*

When switching to an application-defined contrast curve by setting * {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} to CONTRAST_CURVE, the curve is defined * per-channel with a set of (in, out) points that specify the * mapping from input high-bit-depth pixel value to the output * low-bit-depth value. Since the actual pixel ranges of both input * and output may change depending on the camera pipeline, the values * are specified by normalized floating-point numbers.

*

More-complex color mapping operations such as 3D color look-up * tables, selective chroma enhancement, or other non-linear color * transforms will be disabled when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * CONTRAST_CURVE.

*

When using either FAST or HIGH_QUALITY, the camera device will * emit its own tonemap curve in {@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}. * These values are always available, and as close as possible to the * actually used nonlinear/nonglobal transforms.

*

If a request is sent with CONTRAST_CURVE with the camera device's * provided curve in FAST or HIGH_QUALITY, the image's tonemap will be * roughly the same.

*

Possible values: *

    *
  • {@link #TONEMAP_MODE_CONTRAST_CURVE CONTRAST_CURVE}
  • *
  • {@link #TONEMAP_MODE_FAST FAST}
  • *
  • {@link #TONEMAP_MODE_HIGH_QUALITY HIGH_QUALITY}
  • *
  • {@link #TONEMAP_MODE_GAMMA_VALUE GAMMA_VALUE}
  • *
  • {@link #TONEMAP_MODE_PRESET_CURVE PRESET_CURVE}
  • *

*

Available values for this device:
* {@link CameraCharacteristics#TONEMAP_AVAILABLE_TONE_MAP_MODES android.tonemap.availableToneMapModes}

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CameraCharacteristics#TONEMAP_AVAILABLE_TONE_MAP_MODES * @see CaptureRequest#TONEMAP_CURVE * @see CaptureRequest#TONEMAP_MODE * @see #TONEMAP_MODE_CONTRAST_CURVE * @see #TONEMAP_MODE_FAST * @see #TONEMAP_MODE_HIGH_QUALITY * @see #TONEMAP_MODE_GAMMA_VALUE * @see #TONEMAP_MODE_PRESET_CURVE */ @PublicKey public static final Key TONEMAP_MODE = new Key("android.tonemap.mode", int.class); /** *

Tonemapping curve to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * GAMMA_VALUE

*

The tonemap curve will be defined the following formula: * * OUT = pow(IN, 1.0 / gamma) * where IN and OUT is the input pixel value scaled to range [0.0, 1.0], * pow is the power function and gamma is the gamma value specified by this * key.

*

The same curve will be applied to all color channels. The camera device * may clip the input gamma value to its supported range. The actual applied * value will be returned in capture result.

*

The valid range of gamma value varies on different devices, but values * within [1.0, 5.0] are guaranteed not to be clipped.

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#TONEMAP_MODE */ @PublicKey public static final Key TONEMAP_GAMMA = new Key("android.tonemap.gamma", float.class); /** *

Tonemapping curve to use when {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} is * PRESET_CURVE

*

The tonemap curve will be defined by specified standard.

*

sRGB (approximated by 16 control points):

*

sRGB tonemapping curve

*

Rec. 709 (approximated by 16 control points):

*

Rec. 709 tonemapping curve

*

Note that above figures show a 16 control points approximation of preset * curves. Camera devices may apply a different approximation to the curve.

*

Possible values: *

    *
  • {@link #TONEMAP_PRESET_CURVE_SRGB SRGB}
  • *
  • {@link #TONEMAP_PRESET_CURVE_REC709 REC709}
  • *

*

Optional - This value may be {@code null} on some devices.

* * @see CaptureRequest#TONEMAP_MODE * @see #TONEMAP_PRESET_CURVE_SRGB * @see #TONEMAP_PRESET_CURVE_REC709 */ @PublicKey public static final Key TONEMAP_PRESET_CURVE = new Key("android.tonemap.presetCurve", int.class); /** *

This LED is nominally used to indicate to the user * that the camera is powered on and may be streaming images back to the * Application Processor. In certain rare circumstances, the OS may * disable this when video is processed locally and not transmitted to * any untrusted applications.

*

In particular, the LED must always be on when the data could be * transmitted off the device. The LED should always be on whenever * data is stored locally on the device.

*

The LED may be off if a trusted application is using the data that * doesn't violate the above rules.

*

Optional - This value may be {@code null} on some devices.

* @hide */ public static final Key LED_TRANSMIT = new Key("android.led.transmit", boolean.class); /** *

Whether black-level compensation is locked * to its current values, or is free to vary.

*

Whether the black level offset was locked for this frame. Should be * ON if {@link CaptureRequest#BLACK_LEVEL_LOCK android.blackLevel.lock} was ON in the capture request, unless * a change in other capture settings forced the camera device to * perform a black level reset.

*

Optional - This value may be {@code null} on some devices.

*

Full capability - * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#BLACK_LEVEL_LOCK * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL */ @PublicKey public static final Key BLACK_LEVEL_LOCK = new Key("android.blackLevel.lock", boolean.class); /** *

The frame number corresponding to the last request * with which the output result (metadata + buffers) has been fully * synchronized.

*

When a request is submitted to the camera device, there is usually a * delay of several frames before the controls get applied. A camera * device may either choose to account for this delay by implementing a * pipeline and carefully submit well-timed atomic control updates, or * it may start streaming control changes that span over several frame * boundaries.

*

In the latter case, whenever a request's settings change relative to * the previous submitted request, the full set of changes may take * multiple frame durations to fully take effect. Some settings may * take effect sooner (in less frame durations) than others.

*

While a set of control changes are being propagated, this value * will be CONVERGING.

*

Once it is fully known that a set of control changes have been * finished propagating, and the resulting updated control settings * have been read back by the camera device, this value will be set * to a non-negative frame number (corresponding to the request to * which the results have synchronized to).

*

Older camera device implementations may not have a way to detect * when all camera controls have been applied, and will always set this * value to UNKNOWN.

*

FULL capability devices will always have this value set to the * frame number of the request corresponding to this result.

*

Further details:

*
    *
  • Whenever a request differs from the last request, any future * results not yet returned may have this value set to CONVERGING (this * could include any in-progress captures not yet returned by the camera * device, for more details see pipeline considerations below).
  • *
  • Submitting a series of multiple requests that differ from the * previous request (e.g. r1, r2, r3 s.t. r1 != r2 != r3) * moves the new synchronization frame to the last non-repeating * request (using the smallest frame number from the contiguous list of * repeating requests).
  • *
  • Submitting the same request repeatedly will not change this value * to CONVERGING, if it was already a non-negative value.
  • *
  • When this value changes to non-negative, that means that all of the * metadata controls from the request have been applied, all of the * metadata controls from the camera device have been read to the * updated values (into the result), and all of the graphics buffers * corresponding to this result are also synchronized to the request.
  • *
*

Pipeline considerations:

*

Submitting a request with updated controls relative to the previously * submitted requests may also invalidate the synchronization state * of all the results corresponding to currently in-flight requests.

*

In other words, results for this current request and up to * {@link CameraCharacteristics#REQUEST_PIPELINE_MAX_DEPTH android.request.pipelineMaxDepth} prior requests may have their * android.sync.frameNumber change to CONVERGING.

*

Possible values: *

    *
  • {@link #SYNC_FRAME_NUMBER_CONVERGING CONVERGING}
  • *
  • {@link #SYNC_FRAME_NUMBER_UNKNOWN UNKNOWN}
  • *

*

Available values for this device:
* Either a non-negative value corresponding to a * frame_number, or one of the two enums (CONVERGING / UNKNOWN).

*

This key is available on all devices.

* * @see CameraCharacteristics#REQUEST_PIPELINE_MAX_DEPTH * @see #SYNC_FRAME_NUMBER_CONVERGING * @see #SYNC_FRAME_NUMBER_UNKNOWN * @hide */ public static final Key SYNC_FRAME_NUMBER = new Key("android.sync.frameNumber", long.class); /** *

The amount of exposure time increase factor applied to the original output * frame by the application processing before sending for reprocessing.

*

This is optional, and will be supported if the camera device supports YUV_REPROCESSING * capability ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains YUV_REPROCESSING).

*

For some YUV reprocessing use cases, the application may choose to filter the original * output frames to effectively reduce the noise to the same level as a frame that was * captured with longer exposure time. To be more specific, assuming the original captured * images were captured with a sensitivity of S and an exposure time of T, the model in * the camera device is that the amount of noise in the image would be approximately what * would be expected if the original capture parameters had been a sensitivity of * S/effectiveExposureFactor and an exposure time of T*effectiveExposureFactor, rather * than S and T respectively. If the captured images were processed by the application * before being sent for reprocessing, then the application may have used image processing * algorithms and/or multi-frame image fusion to reduce the noise in the * application-processed images (input images). By using the effectiveExposureFactor * control, the application can communicate to the camera device the actual noise level * improvement in the application-processed image. With this information, the camera * device can select appropriate noise reduction and edge enhancement parameters to avoid * excessive noise reduction ({@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode}) and insufficient edge * enhancement ({@link CaptureRequest#EDGE_MODE android.edge.mode}) being applied to the reprocessed frames.

*

For example, for multi-frame image fusion use case, the application may fuse * multiple output frames together to a final frame for reprocessing. When N image are * fused into 1 image for reprocessing, the exposure time increase factor could be up to * square root of N (based on a simple photon shot noise model). The camera device will * adjust the reprocessing noise reduction and edge enhancement parameters accordingly to * produce the best quality images.

*

This is relative factor, 1.0 indicates the application hasn't processed the input * buffer in a way that affects its effective exposure time.

*

This control is only effective for YUV reprocessing capture request. For noise * reduction reprocessing, it is only effective when {@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode} != OFF. * Similarly, for edge enhancement reprocessing, it is only effective when * {@link CaptureRequest#EDGE_MODE android.edge.mode} != OFF.

*

Units: Relative exposure time increase factor.

*

Range of valid values:
* >= 1.0

*

Optional - This value may be {@code null} on some devices.

*

Limited capability - * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key

* * @see CaptureRequest#EDGE_MODE * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see CaptureRequest#NOISE_REDUCTION_MODE * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES */ @PublicKey public static final Key REPROCESS_EFFECTIVE_EXPOSURE_FACTOR = new Key("android.reprocess.effectiveExposureFactor", float.class); /*~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~ * End generated code *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~O@*/ }