1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.hardware.camera2;
18 
19 import android.hardware.camera2.impl.CameraMetadataNative;
20 import android.hardware.camera2.impl.PublicKey;
21 import android.hardware.camera2.impl.SyntheticKey;
22 import android.hardware.camera2.utils.TypeReference;
23 import android.util.Rational;
24 
25 import java.util.Collections;
26 import java.util.List;
27 
28 /**
29  * <p>The properties describing a
30  * {@link CameraDevice CameraDevice}.</p>
31  *
32  * <p>These properties are fixed for a given CameraDevice, and can be queried
33  * through the {@link CameraManager CameraManager}
34  * interface with {@link CameraManager#getCameraCharacteristics}.</p>
35  *
36  * <p>{@link CameraCharacteristics} objects are immutable.</p>
37  *
38  * @see CameraDevice
39  * @see CameraManager
40  */
41 public final class CameraCharacteristics extends CameraMetadata<CameraCharacteristics.Key<?>> {
42 
43     /**
44      * A {@code Key} is used to do camera characteristics field lookups with
45      * {@link CameraCharacteristics#get}.
46      *
47      * <p>For example, to get the stream configuration map:
48      * <code><pre>
49      * StreamConfigurationMap map = cameraCharacteristics.get(
50      *      CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
51      * </pre></code>
52      * </p>
53      *
54      * <p>To enumerate over all possible keys for {@link CameraCharacteristics}, see
55      * {@link CameraCharacteristics#getKeys()}.</p>
56      *
57      * @see CameraCharacteristics#get
58      * @see CameraCharacteristics#getKeys()
59      */
60     public static final class Key<T> {
61         private final CameraMetadataNative.Key<T> mKey;
62 
63         /**
64          * Visible for testing and vendor extensions only.
65          *
66          * @hide
67          */
Key(String name, Class<T> type)68         public Key(String name, Class<T> type) {
69             mKey = new CameraMetadataNative.Key<T>(name,  type);
70         }
71 
72         /**
73          * Visible for testing and vendor extensions only.
74          *
75          * @hide
76          */
Key(String name, TypeReference<T> typeReference)77         public Key(String name, TypeReference<T> typeReference) {
78             mKey = new CameraMetadataNative.Key<T>(name,  typeReference);
79         }
80 
81         /**
82          * Return a camelCase, period separated name formatted like:
83          * {@code "root.section[.subsections].name"}.
84          *
85          * <p>Built-in keys exposed by the Android SDK are always prefixed with {@code "android."};
86          * keys that are device/platform-specific are prefixed with {@code "com."}.</p>
87          *
88          * <p>For example, {@code CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP} would
89          * have a name of {@code "android.scaler.streamConfigurationMap"}; whereas a device
90          * specific key might look like {@code "com.google.nexus.data.private"}.</p>
91          *
92          * @return String representation of the key name
93          */
getName()94         public String getName() {
95             return mKey.getName();
96         }
97 
98         /**
99          * {@inheritDoc}
100          */
101         @Override
hashCode()102         public final int hashCode() {
103             return mKey.hashCode();
104         }
105 
106         /**
107          * {@inheritDoc}
108          */
109         @SuppressWarnings("unchecked")
110         @Override
equals(Object o)111         public final boolean equals(Object o) {
112             return o instanceof Key && ((Key<T>)o).mKey.equals(mKey);
113         }
114 
115         /**
116          * Visible for CameraMetadataNative implementation only; do not use.
117          *
118          * TODO: Make this private or remove it altogether.
119          *
120          * @hide
121          */
getNativeKey()122         public CameraMetadataNative.Key<T> getNativeKey() {
123             return mKey;
124         }
125 
126         @SuppressWarnings({
127                 "unused", "unchecked"
128         })
Key(CameraMetadataNative.Key<?> nativeKey)129         private Key(CameraMetadataNative.Key<?> nativeKey) {
130             mKey = (CameraMetadataNative.Key<T>) nativeKey;
131         }
132     }
133 
134     private final CameraMetadataNative mProperties;
135     private List<CameraCharacteristics.Key<?>> mKeys;
136     private List<CaptureRequest.Key<?>> mAvailableRequestKeys;
137     private List<CaptureResult.Key<?>> mAvailableResultKeys;
138 
139     /**
140      * Takes ownership of the passed-in properties object
141      * @hide
142      */
CameraCharacteristics(CameraMetadataNative properties)143     public CameraCharacteristics(CameraMetadataNative properties) {
144         mProperties = CameraMetadataNative.move(properties);
145     }
146 
147     /**
148      * Returns a copy of the underlying {@link CameraMetadataNative}.
149      * @hide
150      */
getNativeCopy()151     public CameraMetadataNative getNativeCopy() {
152         return new CameraMetadataNative(mProperties);
153     }
154 
155     /**
156      * Get a camera characteristics field value.
157      *
158      * <p>The field definitions can be
159      * found in {@link CameraCharacteristics}.</p>
160      *
161      * <p>Querying the value for the same key more than once will return a value
162      * which is equal to the previous queried value.</p>
163      *
164      * @throws IllegalArgumentException if the key was not valid
165      *
166      * @param key The characteristics field to read.
167      * @return The value of that key, or {@code null} if the field is not set.
168      */
get(Key<T> key)169     public <T> T get(Key<T> key) {
170         return mProperties.get(key);
171     }
172 
173     /**
174      * {@inheritDoc}
175      * @hide
176      */
177     @SuppressWarnings("unchecked")
178     @Override
getProtected(Key<?> key)179     protected <T> T getProtected(Key<?> key) {
180         return (T) mProperties.get(key);
181     }
182 
183     /**
184      * {@inheritDoc}
185      * @hide
186      */
187     @SuppressWarnings("unchecked")
188     @Override
getKeyClass()189     protected Class<Key<?>> getKeyClass() {
190         Object thisClass = Key.class;
191         return (Class<Key<?>>)thisClass;
192     }
193 
194     /**
195      * {@inheritDoc}
196      */
197     @Override
getKeys()198     public List<Key<?>> getKeys() {
199         // List of keys is immutable; cache the results after we calculate them
200         if (mKeys != null) {
201             return mKeys;
202         }
203 
204         int[] filterTags = get(REQUEST_AVAILABLE_CHARACTERISTICS_KEYS);
205         if (filterTags == null) {
206             throw new AssertionError("android.request.availableCharacteristicsKeys must be non-null"
207                     + " in the characteristics");
208         }
209 
210         mKeys = Collections.unmodifiableList(
211                 getKeysStatic(getClass(), getKeyClass(), this, filterTags));
212         return mKeys;
213     }
214 
215     /**
216      * Returns the list of keys supported by this {@link CameraDevice} for querying
217      * with a {@link CaptureRequest}.
218      *
219      * <p>The list returned is not modifiable, so any attempts to modify it will throw
220      * a {@code UnsupportedOperationException}.</p>
221      *
222      * <p>Each key is only listed once in the list. The order of the keys is undefined.</p>
223      *
224      * <p>Note that there is no {@code getAvailableCameraCharacteristicsKeys()} -- use
225      * {@link #getKeys()} instead.</p>
226      *
227      * @return List of keys supported by this CameraDevice for CaptureRequests.
228      */
229     @SuppressWarnings({"unchecked"})
getAvailableCaptureRequestKeys()230     public List<CaptureRequest.Key<?>> getAvailableCaptureRequestKeys() {
231         if (mAvailableRequestKeys == null) {
232             Object crKey = CaptureRequest.Key.class;
233             Class<CaptureRequest.Key<?>> crKeyTyped = (Class<CaptureRequest.Key<?>>)crKey;
234 
235             int[] filterTags = get(REQUEST_AVAILABLE_REQUEST_KEYS);
236             if (filterTags == null) {
237                 throw new AssertionError("android.request.availableRequestKeys must be non-null "
238                         + "in the characteristics");
239             }
240             mAvailableRequestKeys =
241                     getAvailableKeyList(CaptureRequest.class, crKeyTyped, filterTags);
242         }
243         return mAvailableRequestKeys;
244     }
245 
246     /**
247      * Returns the list of keys supported by this {@link CameraDevice} for querying
248      * with a {@link CaptureResult}.
249      *
250      * <p>The list returned is not modifiable, so any attempts to modify it will throw
251      * a {@code UnsupportedOperationException}.</p>
252      *
253      * <p>Each key is only listed once in the list. The order of the keys is undefined.</p>
254      *
255      * <p>Note that there is no {@code getAvailableCameraCharacteristicsKeys()} -- use
256      * {@link #getKeys()} instead.</p>
257      *
258      * @return List of keys supported by this CameraDevice for CaptureResults.
259      */
260     @SuppressWarnings({"unchecked"})
getAvailableCaptureResultKeys()261     public List<CaptureResult.Key<?>> getAvailableCaptureResultKeys() {
262         if (mAvailableResultKeys == null) {
263             Object crKey = CaptureResult.Key.class;
264             Class<CaptureResult.Key<?>> crKeyTyped = (Class<CaptureResult.Key<?>>)crKey;
265 
266             int[] filterTags = get(REQUEST_AVAILABLE_RESULT_KEYS);
267             if (filterTags == null) {
268                 throw new AssertionError("android.request.availableResultKeys must be non-null "
269                         + "in the characteristics");
270             }
271             mAvailableResultKeys = getAvailableKeyList(CaptureResult.class, crKeyTyped, filterTags);
272         }
273         return mAvailableResultKeys;
274     }
275 
276     /**
277      * Returns the list of keys supported by this {@link CameraDevice} by metadataClass.
278      *
279      * <p>The list returned is not modifiable, so any attempts to modify it will throw
280      * a {@code UnsupportedOperationException}.</p>
281      *
282      * <p>Each key is only listed once in the list. The order of the keys is undefined.</p>
283      *
284      * @param metadataClass The subclass of CameraMetadata that you want to get the keys for.
285      * @param keyClass The class of the metadata key, e.g. CaptureRequest.Key.class
286      *
287      * @return List of keys supported by this CameraDevice for metadataClass.
288      *
289      * @throws IllegalArgumentException if metadataClass is not a subclass of CameraMetadata
290      */
291     private <TKey> List<TKey>
getAvailableKeyList(Class<?> metadataClass, Class<TKey> keyClass, int[] filterTags)292     getAvailableKeyList(Class<?> metadataClass, Class<TKey> keyClass, int[] filterTags) {
293 
294         if (metadataClass.equals(CameraMetadata.class)) {
295             throw new AssertionError(
296                     "metadataClass must be a strict subclass of CameraMetadata");
297         } else if (!CameraMetadata.class.isAssignableFrom(metadataClass)) {
298             throw new AssertionError(
299                     "metadataClass must be a subclass of CameraMetadata");
300         }
301 
302         List<TKey> staticKeyList = CameraCharacteristics.<TKey>getKeysStatic(
303                 metadataClass, keyClass, /*instance*/null, filterTags);
304         return Collections.unmodifiableList(staticKeyList);
305     }
306 
307     /*@O~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
308      * The key entries below this point are generated from metadata
309      * definitions in /system/media/camera/docs. Do not modify by hand or
310      * modify the comment blocks at the start or end.
311      *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~*/
312 
313     /**
314      * <p>List of aberration correction modes for {@link CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE android.colorCorrection.aberrationMode} that are
315      * supported by this camera device.</p>
316      * <p>This key lists the valid modes for {@link CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE android.colorCorrection.aberrationMode}.  If no
317      * aberration correction modes are available for a device, this list will solely include
318      * OFF mode. All camera devices will support either OFF or FAST mode.</p>
319      * <p>Camera devices that support the MANUAL_POST_PROCESSING capability will always list
320      * OFF mode. This includes all FULL level devices.</p>
321      * <p>LEGACY devices will always only support FAST mode.</p>
322      * <p><b>Range of valid values:</b><br>
323      * Any value listed in {@link CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE android.colorCorrection.aberrationMode}</p>
324      * <p>This key is available on all devices.</p>
325      *
326      * @see CaptureRequest#COLOR_CORRECTION_ABERRATION_MODE
327      */
328     @PublicKey
329     public static final Key<int[]> COLOR_CORRECTION_AVAILABLE_ABERRATION_MODES =
330             new Key<int[]>("android.colorCorrection.availableAberrationModes", int[].class);
331 
332     /**
333      * <p>List of auto-exposure antibanding modes for {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode} that are
334      * supported by this camera device.</p>
335      * <p>Not all of the auto-exposure anti-banding modes may be
336      * supported by a given camera device. This field lists the
337      * valid anti-banding modes that the application may request
338      * for this camera device with the
339      * {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode} control.</p>
340      * <p><b>Range of valid values:</b><br>
341      * Any value listed in {@link CaptureRequest#CONTROL_AE_ANTIBANDING_MODE android.control.aeAntibandingMode}</p>
342      * <p>This key is available on all devices.</p>
343      *
344      * @see CaptureRequest#CONTROL_AE_ANTIBANDING_MODE
345      */
346     @PublicKey
347     public static final Key<int[]> CONTROL_AE_AVAILABLE_ANTIBANDING_MODES =
348             new Key<int[]>("android.control.aeAvailableAntibandingModes", int[].class);
349 
350     /**
351      * <p>List of auto-exposure modes for {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} that are supported by this camera
352      * device.</p>
353      * <p>Not all the auto-exposure modes may be supported by a
354      * given camera device, especially if no flash unit is
355      * available. This entry lists the valid modes for
356      * {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode} for this camera device.</p>
357      * <p>All camera devices support ON, and all camera devices with flash
358      * units support ON_AUTO_FLASH and ON_ALWAYS_FLASH.</p>
359      * <p>FULL mode camera devices always support OFF mode,
360      * which enables application control of camera exposure time,
361      * sensitivity, and frame duration.</p>
362      * <p>LEGACY mode camera devices never support OFF mode.
363      * LIMITED mode devices support OFF if they support the MANUAL_SENSOR
364      * capability.</p>
365      * <p><b>Range of valid values:</b><br>
366      * Any value listed in {@link CaptureRequest#CONTROL_AE_MODE android.control.aeMode}</p>
367      * <p>This key is available on all devices.</p>
368      *
369      * @see CaptureRequest#CONTROL_AE_MODE
370      */
371     @PublicKey
372     public static final Key<int[]> CONTROL_AE_AVAILABLE_MODES =
373             new Key<int[]>("android.control.aeAvailableModes", int[].class);
374 
375     /**
376      * <p>List of frame rate ranges for {@link CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE android.control.aeTargetFpsRange} supported by
377      * this camera device.</p>
378      * <p>For devices at the LIMITED level or above, this list will include at least (30, 30) for
379      * constant-framerate recording.</p>
380      * <p><b>Units</b>: Frames per second (FPS)</p>
381      * <p>This key is available on all devices.</p>
382      *
383      * @see CaptureRequest#CONTROL_AE_TARGET_FPS_RANGE
384      */
385     @PublicKey
386     public static final Key<android.util.Range<Integer>[]> CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES =
387             new Key<android.util.Range<Integer>[]>("android.control.aeAvailableTargetFpsRanges", new TypeReference<android.util.Range<Integer>[]>() {{ }});
388 
389     /**
390      * <p>Maximum and minimum exposure compensation values for
391      * {@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation}, in counts of {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP android.control.aeCompensationStep},
392      * that are supported by this camera device.</p>
393      * <p><b>Range of valid values:</b><br></p>
394      * <p>Range [0,0] indicates that exposure compensation is not supported.</p>
395      * <p>For LIMITED and FULL devices, range must follow below requirements if exposure
396      * compensation is supported (<code>range != [0, 0]</code>):</p>
397      * <p><code>Min.exposure compensation * {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP android.control.aeCompensationStep} &lt;= -2 EV</code></p>
398      * <p><code>Max.exposure compensation * {@link CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP android.control.aeCompensationStep} &gt;= 2 EV</code></p>
399      * <p>LEGACY devices may support a smaller range than this.</p>
400      * <p>This key is available on all devices.</p>
401      *
402      * @see CameraCharacteristics#CONTROL_AE_COMPENSATION_STEP
403      * @see CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION
404      */
405     @PublicKey
406     public static final Key<android.util.Range<Integer>> CONTROL_AE_COMPENSATION_RANGE =
407             new Key<android.util.Range<Integer>>("android.control.aeCompensationRange", new TypeReference<android.util.Range<Integer>>() {{ }});
408 
409     /**
410      * <p>Smallest step by which the exposure compensation
411      * can be changed.</p>
412      * <p>This is the unit for {@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation}. For example, if this key has
413      * a value of <code>1/2</code>, then a setting of <code>-2</code> for {@link CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION android.control.aeExposureCompensation} means
414      * that the target EV offset for the auto-exposure routine is -1 EV.</p>
415      * <p>One unit of EV compensation changes the brightness of the captured image by a factor
416      * of two. +1 EV doubles the image brightness, while -1 EV halves the image brightness.</p>
417      * <p><b>Units</b>: Exposure Value (EV)</p>
418      * <p>This key is available on all devices.</p>
419      *
420      * @see CaptureRequest#CONTROL_AE_EXPOSURE_COMPENSATION
421      */
422     @PublicKey
423     public static final Key<Rational> CONTROL_AE_COMPENSATION_STEP =
424             new Key<Rational>("android.control.aeCompensationStep", Rational.class);
425 
426     /**
427      * <p>List of auto-focus (AF) modes for {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} that are
428      * supported by this camera device.</p>
429      * <p>Not all the auto-focus modes may be supported by a
430      * given camera device. This entry lists the valid modes for
431      * {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode} for this camera device.</p>
432      * <p>All LIMITED and FULL mode camera devices will support OFF mode, and all
433      * camera devices with adjustable focuser units
434      * (<code>{@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance} &gt; 0</code>) will support AUTO mode.</p>
435      * <p>LEGACY devices will support OFF mode only if they support
436      * focusing to infinity (by also setting {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance} to
437      * <code>0.0f</code>).</p>
438      * <p><b>Range of valid values:</b><br>
439      * Any value listed in {@link CaptureRequest#CONTROL_AF_MODE android.control.afMode}</p>
440      * <p>This key is available on all devices.</p>
441      *
442      * @see CaptureRequest#CONTROL_AF_MODE
443      * @see CaptureRequest#LENS_FOCUS_DISTANCE
444      * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE
445      */
446     @PublicKey
447     public static final Key<int[]> CONTROL_AF_AVAILABLE_MODES =
448             new Key<int[]>("android.control.afAvailableModes", int[].class);
449 
450     /**
451      * <p>List of color effects for {@link CaptureRequest#CONTROL_EFFECT_MODE android.control.effectMode} that are supported by this camera
452      * device.</p>
453      * <p>This list contains the color effect modes that can be applied to
454      * images produced by the camera device.
455      * Implementations are not expected to be consistent across all devices.
456      * If no color effect modes are available for a device, this will only list
457      * OFF.</p>
458      * <p>A color effect will only be applied if
459      * {@link CaptureRequest#CONTROL_MODE android.control.mode} != OFF.  OFF is always included in this list.</p>
460      * <p>This control has no effect on the operation of other control routines such
461      * as auto-exposure, white balance, or focus.</p>
462      * <p><b>Range of valid values:</b><br>
463      * Any value listed in {@link CaptureRequest#CONTROL_EFFECT_MODE android.control.effectMode}</p>
464      * <p>This key is available on all devices.</p>
465      *
466      * @see CaptureRequest#CONTROL_EFFECT_MODE
467      * @see CaptureRequest#CONTROL_MODE
468      */
469     @PublicKey
470     public static final Key<int[]> CONTROL_AVAILABLE_EFFECTS =
471             new Key<int[]>("android.control.availableEffects", int[].class);
472 
473     /**
474      * <p>List of scene modes for {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} that are supported by this camera
475      * device.</p>
476      * <p>This list contains scene modes that can be set for the camera device.
477      * Only scene modes that have been fully implemented for the
478      * camera device may be included here. Implementations are not expected
479      * to be consistent across all devices.</p>
480      * <p>If no scene modes are supported by the camera device, this
481      * will be set to DISABLED. Otherwise DISABLED will not be listed.</p>
482      * <p>FACE_PRIORITY is always listed if face detection is
483      * supported (i.e.<code>{@link CameraCharacteristics#STATISTICS_INFO_MAX_FACE_COUNT android.statistics.info.maxFaceCount} &gt;
484      * 0</code>).</p>
485      * <p><b>Range of valid values:</b><br>
486      * Any value listed in {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode}</p>
487      * <p>This key is available on all devices.</p>
488      *
489      * @see CaptureRequest#CONTROL_SCENE_MODE
490      * @see CameraCharacteristics#STATISTICS_INFO_MAX_FACE_COUNT
491      */
492     @PublicKey
493     public static final Key<int[]> CONTROL_AVAILABLE_SCENE_MODES =
494             new Key<int[]>("android.control.availableSceneModes", int[].class);
495 
496     /**
497      * <p>List of video stabilization modes for {@link CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE android.control.videoStabilizationMode}
498      * that are supported by this camera device.</p>
499      * <p>OFF will always be listed.</p>
500      * <p><b>Range of valid values:</b><br>
501      * Any value listed in {@link CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE android.control.videoStabilizationMode}</p>
502      * <p>This key is available on all devices.</p>
503      *
504      * @see CaptureRequest#CONTROL_VIDEO_STABILIZATION_MODE
505      */
506     @PublicKey
507     public static final Key<int[]> CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES =
508             new Key<int[]>("android.control.availableVideoStabilizationModes", int[].class);
509 
510     /**
511      * <p>List of auto-white-balance modes for {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} that are supported by this
512      * camera device.</p>
513      * <p>Not all the auto-white-balance modes may be supported by a
514      * given camera device. This entry lists the valid modes for
515      * {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode} for this camera device.</p>
516      * <p>All camera devices will support ON mode.</p>
517      * <p>Camera devices that support the MANUAL_POST_PROCESSING capability will always support OFF
518      * mode, which enables application control of white balance, by using
519      * {@link CaptureRequest#COLOR_CORRECTION_TRANSFORM android.colorCorrection.transform} and {@link CaptureRequest#COLOR_CORRECTION_GAINS android.colorCorrection.gains}({@link CaptureRequest#COLOR_CORRECTION_MODE android.colorCorrection.mode} must be set to TRANSFORM_MATRIX). This includes all FULL
520      * mode camera devices.</p>
521      * <p><b>Range of valid values:</b><br>
522      * Any value listed in {@link CaptureRequest#CONTROL_AWB_MODE android.control.awbMode}</p>
523      * <p>This key is available on all devices.</p>
524      *
525      * @see CaptureRequest#COLOR_CORRECTION_GAINS
526      * @see CaptureRequest#COLOR_CORRECTION_MODE
527      * @see CaptureRequest#COLOR_CORRECTION_TRANSFORM
528      * @see CaptureRequest#CONTROL_AWB_MODE
529      */
530     @PublicKey
531     public static final Key<int[]> CONTROL_AWB_AVAILABLE_MODES =
532             new Key<int[]>("android.control.awbAvailableModes", int[].class);
533 
534     /**
535      * <p>List of the maximum number of regions that can be used for metering in
536      * auto-exposure (AE), auto-white balance (AWB), and auto-focus (AF);
537      * this corresponds to the the maximum number of elements in
538      * {@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}, {@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions},
539      * and {@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions}.</p>
540      * <p><b>Range of valid values:</b><br></p>
541      * <p>Value must be &gt;= 0 for each element. For full-capability devices
542      * this value must be &gt;= 1 for AE and AF. The order of the elements is:
543      * <code>(AE, AWB, AF)</code>.</p>
544      * <p>This key is available on all devices.</p>
545      *
546      * @see CaptureRequest#CONTROL_AE_REGIONS
547      * @see CaptureRequest#CONTROL_AF_REGIONS
548      * @see CaptureRequest#CONTROL_AWB_REGIONS
549      * @hide
550      */
551     public static final Key<int[]> CONTROL_MAX_REGIONS =
552             new Key<int[]>("android.control.maxRegions", int[].class);
553 
554     /**
555      * <p>The maximum number of metering regions that can be used by the auto-exposure (AE)
556      * routine.</p>
557      * <p>This corresponds to the the maximum allowed number of elements in
558      * {@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}.</p>
559      * <p><b>Range of valid values:</b><br>
560      * Value will be &gt;= 0. For FULL-capability devices, this
561      * value will be &gt;= 1.</p>
562      * <p>This key is available on all devices.</p>
563      *
564      * @see CaptureRequest#CONTROL_AE_REGIONS
565      */
566     @PublicKey
567     @SyntheticKey
568     public static final Key<Integer> CONTROL_MAX_REGIONS_AE =
569             new Key<Integer>("android.control.maxRegionsAe", int.class);
570 
571     /**
572      * <p>The maximum number of metering regions that can be used by the auto-white balance (AWB)
573      * routine.</p>
574      * <p>This corresponds to the the maximum allowed number of elements in
575      * {@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions}.</p>
576      * <p><b>Range of valid values:</b><br>
577      * Value will be &gt;= 0.</p>
578      * <p>This key is available on all devices.</p>
579      *
580      * @see CaptureRequest#CONTROL_AWB_REGIONS
581      */
582     @PublicKey
583     @SyntheticKey
584     public static final Key<Integer> CONTROL_MAX_REGIONS_AWB =
585             new Key<Integer>("android.control.maxRegionsAwb", int.class);
586 
587     /**
588      * <p>The maximum number of metering regions that can be used by the auto-focus (AF) routine.</p>
589      * <p>This corresponds to the the maximum allowed number of elements in
590      * {@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions}.</p>
591      * <p><b>Range of valid values:</b><br>
592      * Value will be &gt;= 0. For FULL-capability devices, this
593      * value will be &gt;= 1.</p>
594      * <p>This key is available on all devices.</p>
595      *
596      * @see CaptureRequest#CONTROL_AF_REGIONS
597      */
598     @PublicKey
599     @SyntheticKey
600     public static final Key<Integer> CONTROL_MAX_REGIONS_AF =
601             new Key<Integer>("android.control.maxRegionsAf", int.class);
602 
603     /**
604      * <p>List of available high speed video size and fps range configurations
605      * supported by the camera device, in the format of (width, height, fps_min, fps_max).</p>
606      * <p>When HIGH_SPEED_VIDEO is supported in {@link CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES android.control.availableSceneModes},
607      * this metadata will list the supported high speed video size and fps range
608      * configurations. All the sizes listed in this configuration will be a subset
609      * of the sizes reported by StreamConfigurationMap#getOutputSizes for processed
610      * non-stalling formats.</p>
611      * <p>For the high speed video use case, where the application will set
612      * {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} to HIGH_SPEED_VIDEO in capture requests, the application must
613      * select the video size and fps range from this metadata to configure the recording and
614      * preview streams and setup the recording requests. For example, if the application intends
615      * to do high speed recording, it can select the maximum size reported by this metadata to
616      * configure output streams. Once the size is selected, application can filter this metadata
617      * by selected size and get the supported fps ranges, and use these fps ranges to setup the
618      * recording requests. Note that for the use case of multiple output streams, application
619      * must select one unique size from this metadata to use. Otherwise a request error might
620      * occur.</p>
621      * <p>For normal video recording use case, where some application will NOT set
622      * {@link CaptureRequest#CONTROL_SCENE_MODE android.control.sceneMode} to HIGH_SPEED_VIDEO in capture requests, the fps ranges
623      * reported in this metadata must not be used to setup capture requests, or it will cause
624      * request error.</p>
625      * <p><b>Range of valid values:</b><br></p>
626      * <p>For each configuration, the fps_max &gt;= 60fps.</p>
627      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
628      * <p><b>Limited capability</b> -
629      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
630      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
631      *
632      * @see CameraCharacteristics#CONTROL_AVAILABLE_SCENE_MODES
633      * @see CaptureRequest#CONTROL_SCENE_MODE
634      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
635      * @hide
636      */
637     public static final Key<android.hardware.camera2.params.HighSpeedVideoConfiguration[]> CONTROL_AVAILABLE_HIGH_SPEED_VIDEO_CONFIGURATIONS =
638             new Key<android.hardware.camera2.params.HighSpeedVideoConfiguration[]>("android.control.availableHighSpeedVideoConfigurations", android.hardware.camera2.params.HighSpeedVideoConfiguration[].class);
639 
640     /**
641      * <p>List of edge enhancement modes for {@link CaptureRequest#EDGE_MODE android.edge.mode} that are supported by this camera
642      * device.</p>
643      * <p>Full-capability camera devices must always support OFF; all devices will list FAST.</p>
644      * <p><b>Range of valid values:</b><br>
645      * Any value listed in {@link CaptureRequest#EDGE_MODE android.edge.mode}</p>
646      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
647      * <p><b>Full capability</b> -
648      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
649      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
650      *
651      * @see CaptureRequest#EDGE_MODE
652      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
653      */
654     @PublicKey
655     public static final Key<int[]> EDGE_AVAILABLE_EDGE_MODES =
656             new Key<int[]>("android.edge.availableEdgeModes", int[].class);
657 
658     /**
659      * <p>Whether this camera device has a
660      * flash unit.</p>
661      * <p>Will be <code>false</code> if no flash is available.</p>
662      * <p>If there is no flash unit, none of the flash controls do
663      * anything.
664      * This key is available on all devices.</p>
665      */
666     @PublicKey
667     public static final Key<Boolean> FLASH_INFO_AVAILABLE =
668             new Key<Boolean>("android.flash.info.available", boolean.class);
669 
670     /**
671      * <p>List of hot pixel correction modes for {@link CaptureRequest#HOT_PIXEL_MODE android.hotPixel.mode} that are supported by this
672      * camera device.</p>
673      * <p>FULL mode camera devices will always support FAST.</p>
674      * <p><b>Range of valid values:</b><br>
675      * Any value listed in {@link CaptureRequest#HOT_PIXEL_MODE android.hotPixel.mode}</p>
676      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
677      *
678      * @see CaptureRequest#HOT_PIXEL_MODE
679      */
680     @PublicKey
681     public static final Key<int[]> HOT_PIXEL_AVAILABLE_HOT_PIXEL_MODES =
682             new Key<int[]>("android.hotPixel.availableHotPixelModes", int[].class);
683 
684     /**
685      * <p>List of JPEG thumbnail sizes for {@link CaptureRequest#JPEG_THUMBNAIL_SIZE android.jpeg.thumbnailSize} supported by this
686      * camera device.</p>
687      * <p>This list will include at least one non-zero resolution, plus <code>(0,0)</code> for indicating no
688      * thumbnail should be generated.</p>
689      * <p>Below condiditions will be satisfied for this size list:</p>
690      * <ul>
691      * <li>The sizes will be sorted by increasing pixel area (width x height).
692      * If several resolutions have the same area, they will be sorted by increasing width.</li>
693      * <li>The aspect ratio of the largest thumbnail size will be same as the
694      * aspect ratio of largest JPEG output size in android.scaler.availableStreamConfigurations.
695      * The largest size is defined as the size that has the largest pixel area
696      * in a given size list.</li>
697      * <li>Each output JPEG size in android.scaler.availableStreamConfigurations will have at least
698      * one corresponding size that has the same aspect ratio in availableThumbnailSizes,
699      * and vice versa.</li>
700      * <li>All non-<code>(0, 0)</code> sizes will have non-zero widths and heights.
701      * This key is available on all devices.</li>
702      * </ul>
703      *
704      * @see CaptureRequest#JPEG_THUMBNAIL_SIZE
705      */
706     @PublicKey
707     public static final Key<android.util.Size[]> JPEG_AVAILABLE_THUMBNAIL_SIZES =
708             new Key<android.util.Size[]>("android.jpeg.availableThumbnailSizes", android.util.Size[].class);
709 
710     /**
711      * <p>List of aperture size values for {@link CaptureRequest#LENS_APERTURE android.lens.aperture} that are
712      * supported by this camera device.</p>
713      * <p>If the camera device doesn't support a variable lens aperture,
714      * this list will contain only one value, which is the fixed aperture size.</p>
715      * <p>If the camera device supports a variable aperture, the aperture values
716      * in this list will be sorted in ascending order.</p>
717      * <p><b>Units</b>: The aperture f-number</p>
718      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
719      * <p><b>Full capability</b> -
720      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
721      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
722      *
723      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
724      * @see CaptureRequest#LENS_APERTURE
725      */
726     @PublicKey
727     public static final Key<float[]> LENS_INFO_AVAILABLE_APERTURES =
728             new Key<float[]>("android.lens.info.availableApertures", float[].class);
729 
730     /**
731      * <p>List of neutral density filter values for
732      * {@link CaptureRequest#LENS_FILTER_DENSITY android.lens.filterDensity} that are supported by this camera device.</p>
733      * <p>If a neutral density filter is not supported by this camera device,
734      * this list will contain only 0. Otherwise, this list will include every
735      * filter density supported by the camera device, in ascending order.</p>
736      * <p><b>Units</b>: Exposure value (EV)</p>
737      * <p><b>Range of valid values:</b><br></p>
738      * <p>Values are &gt;= 0</p>
739      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
740      * <p><b>Full capability</b> -
741      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
742      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
743      *
744      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
745      * @see CaptureRequest#LENS_FILTER_DENSITY
746      */
747     @PublicKey
748     public static final Key<float[]> LENS_INFO_AVAILABLE_FILTER_DENSITIES =
749             new Key<float[]>("android.lens.info.availableFilterDensities", float[].class);
750 
751     /**
752      * <p>List of focal lengths for {@link CaptureRequest#LENS_FOCAL_LENGTH android.lens.focalLength} that are supported by this camera
753      * device.</p>
754      * <p>If optical zoom is not supported, this list will only contain
755      * a single value corresponding to the fixed focal length of the
756      * device. Otherwise, this list will include every focal length supported
757      * by the camera device, in ascending order.</p>
758      * <p><b>Units</b>: Millimeters</p>
759      * <p><b>Range of valid values:</b><br></p>
760      * <p>Values are &gt; 0</p>
761      * <p>This key is available on all devices.</p>
762      *
763      * @see CaptureRequest#LENS_FOCAL_LENGTH
764      */
765     @PublicKey
766     public static final Key<float[]> LENS_INFO_AVAILABLE_FOCAL_LENGTHS =
767             new Key<float[]>("android.lens.info.availableFocalLengths", float[].class);
768 
769     /**
770      * <p>List of optical image stabilization (OIS) modes for
771      * {@link CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE android.lens.opticalStabilizationMode} that are supported by this camera device.</p>
772      * <p>If OIS is not supported by a given camera device, this list will
773      * contain only OFF.</p>
774      * <p><b>Range of valid values:</b><br>
775      * Any value listed in {@link CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE android.lens.opticalStabilizationMode}</p>
776      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
777      * <p><b>Limited capability</b> -
778      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
779      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
780      *
781      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
782      * @see CaptureRequest#LENS_OPTICAL_STABILIZATION_MODE
783      */
784     @PublicKey
785     public static final Key<int[]> LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION =
786             new Key<int[]>("android.lens.info.availableOpticalStabilization", int[].class);
787 
788     /**
789      * <p>Hyperfocal distance for this lens.</p>
790      * <p>If the lens is not fixed focus, the camera device will report this
791      * field when {@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} is APPROXIMATE or CALIBRATED.</p>
792      * <p><b>Units</b>: See {@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} for details</p>
793      * <p><b>Range of valid values:</b><br>
794      * If lens is fixed focus, &gt;= 0. If lens has focuser unit, the value is
795      * within <code>(0.0f, {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance}]</code></p>
796      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
797      * <p><b>Limited capability</b> -
798      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
799      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
800      *
801      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
802      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
803      * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE
804      */
805     @PublicKey
806     public static final Key<Float> LENS_INFO_HYPERFOCAL_DISTANCE =
807             new Key<Float>("android.lens.info.hyperfocalDistance", float.class);
808 
809     /**
810      * <p>Shortest distance from frontmost surface
811      * of the lens that can be brought into sharp focus.</p>
812      * <p>If the lens is fixed-focus, this will be
813      * 0.</p>
814      * <p><b>Units</b>: See {@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} for details</p>
815      * <p><b>Range of valid values:</b><br>
816      * &gt;= 0</p>
817      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
818      * <p><b>Limited capability</b> -
819      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
820      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
821      *
822      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
823      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
824      */
825     @PublicKey
826     public static final Key<Float> LENS_INFO_MINIMUM_FOCUS_DISTANCE =
827             new Key<Float>("android.lens.info.minimumFocusDistance", float.class);
828 
829     /**
830      * <p>Dimensions of lens shading map.</p>
831      * <p>The map should be on the order of 30-40 rows and columns, and
832      * must be smaller than 64x64.</p>
833      * <p><b>Range of valid values:</b><br>
834      * Both values &gt;= 1</p>
835      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
836      * <p><b>Full capability</b> -
837      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
838      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
839      *
840      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
841      * @hide
842      */
843     public static final Key<android.util.Size> LENS_INFO_SHADING_MAP_SIZE =
844             new Key<android.util.Size>("android.lens.info.shadingMapSize", android.util.Size.class);
845 
846     /**
847      * <p>The lens focus distance calibration quality.</p>
848      * <p>The lens focus distance calibration quality determines the reliability of
849      * focus related metadata entries, i.e. {@link CaptureRequest#LENS_FOCUS_DISTANCE android.lens.focusDistance},
850      * {@link CaptureResult#LENS_FOCUS_RANGE android.lens.focusRange}, {@link CameraCharacteristics#LENS_INFO_HYPERFOCAL_DISTANCE android.lens.info.hyperfocalDistance}, and
851      * {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance}.</p>
852      * <p>APPROXIMATE and CALIBRATED devices report the focus metadata in
853      * units of diopters (1/meter), so <code>0.0f</code> represents focusing at infinity,
854      * and increasing positive numbers represent focusing closer and closer
855      * to the camera device. The focus distance control also uses diopters
856      * on these devices.</p>
857      * <p>UNCALIBRATED devices do not use units that are directly comparable
858      * to any real physical measurement, but <code>0.0f</code> still represents farthest
859      * focus, and {@link CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE android.lens.info.minimumFocusDistance} represents the
860      * nearest focus the device can achieve.</p>
861      * <p><b>Possible values:</b>
862      * <ul>
863      *   <li>{@link #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_UNCALIBRATED UNCALIBRATED}</li>
864      *   <li>{@link #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_APPROXIMATE APPROXIMATE}</li>
865      *   <li>{@link #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_CALIBRATED CALIBRATED}</li>
866      * </ul></p>
867      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
868      * <p><b>Limited capability</b> -
869      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
870      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
871      *
872      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
873      * @see CaptureRequest#LENS_FOCUS_DISTANCE
874      * @see CaptureResult#LENS_FOCUS_RANGE
875      * @see CameraCharacteristics#LENS_INFO_HYPERFOCAL_DISTANCE
876      * @see CameraCharacteristics#LENS_INFO_MINIMUM_FOCUS_DISTANCE
877      * @see #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_UNCALIBRATED
878      * @see #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_APPROXIMATE
879      * @see #LENS_INFO_FOCUS_DISTANCE_CALIBRATION_CALIBRATED
880      */
881     @PublicKey
882     public static final Key<Integer> LENS_INFO_FOCUS_DISTANCE_CALIBRATION =
883             new Key<Integer>("android.lens.info.focusDistanceCalibration", int.class);
884 
885     /**
886      * <p>Direction the camera faces relative to
887      * device screen.</p>
888      * <p><b>Possible values:</b>
889      * <ul>
890      *   <li>{@link #LENS_FACING_FRONT FRONT}</li>
891      *   <li>{@link #LENS_FACING_BACK BACK}</li>
892      * </ul></p>
893      * <p>This key is available on all devices.</p>
894      * @see #LENS_FACING_FRONT
895      * @see #LENS_FACING_BACK
896      */
897     @PublicKey
898     public static final Key<Integer> LENS_FACING =
899             new Key<Integer>("android.lens.facing", int.class);
900 
901     /**
902      * <p>List of noise reduction modes for {@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode} that are supported
903      * by this camera device.</p>
904      * <p>Full-capability camera devices will always support OFF and FAST.</p>
905      * <p>Legacy-capability camera devices will only support FAST mode.</p>
906      * <p><b>Range of valid values:</b><br>
907      * Any value listed in {@link CaptureRequest#NOISE_REDUCTION_MODE android.noiseReduction.mode}</p>
908      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
909      * <p><b>Limited capability</b> -
910      * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
911      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
912      *
913      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
914      * @see CaptureRequest#NOISE_REDUCTION_MODE
915      */
916     @PublicKey
917     public static final Key<int[]> NOISE_REDUCTION_AVAILABLE_NOISE_REDUCTION_MODES =
918             new Key<int[]>("android.noiseReduction.availableNoiseReductionModes", int[].class);
919 
920     /**
921      * <p>If set to 1, the HAL will always split result
922      * metadata for a single capture into multiple buffers,
923      * returned using multiple process_capture_result calls.</p>
924      * <p>Does not need to be listed in static
925      * metadata. Support for partial results will be reworked in
926      * future versions of camera service. This quirk will stop
927      * working at that point; DO NOT USE without careful
928      * consideration of future support.</p>
929      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
930      * @deprecated
931      * @hide
932      */
933     @Deprecated
934     public static final Key<Byte> QUIRKS_USE_PARTIAL_RESULT =
935             new Key<Byte>("android.quirks.usePartialResult", byte.class);
936 
937     /**
938      * <p>The maximum numbers of different types of output streams
939      * that can be configured and used simultaneously by a camera device.</p>
940      * <p>This is a 3 element tuple that contains the max number of output simultaneous
941      * streams for raw sensor, processed (but not stalling), and processed (and stalling)
942      * formats respectively. For example, assuming that JPEG is typically a processed and
943      * stalling stream, if max raw sensor format output stream number is 1, max YUV streams
944      * number is 3, and max JPEG stream number is 2, then this tuple should be <code>(1, 3, 2)</code>.</p>
945      * <p>This lists the upper bound of the number of output streams supported by
946      * the camera device. Using more streams simultaneously may require more hardware and
947      * CPU resources that will consume more power. The image format for an output stream can
948      * be any supported format provided by android.scaler.availableStreamConfigurations.
949      * The formats defined in android.scaler.availableStreamConfigurations can be catergorized
950      * into the 3 stream types as below:</p>
951      * <ul>
952      * <li>Processed (but stalling): any non-RAW format with a stallDurations &gt; 0.
953      * Typically JPEG format (ImageFormat#JPEG).</li>
954      * <li>Raw formats: ImageFormat#RAW_SENSOR, ImageFormat#RAW10 and ImageFormat#RAW_OPAQUE.</li>
955      * <li>Processed (but not-stalling): any non-RAW format without a stall duration.
956      * Typically ImageFormat#YUV_420_888, ImageFormat#NV21, ImageFormat#YV12.</li>
957      * </ul>
958      * <p><b>Range of valid values:</b><br></p>
959      * <p>For processed (and stalling) format streams, &gt;= 1.</p>
960      * <p>For Raw format (either stalling or non-stalling) streams, &gt;= 0.</p>
961      * <p>For processed (but not stalling) format streams, &gt;= 3
962      * for FULL mode devices (<code>{@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == FULL</code>);
963      * &gt;= 2 for LIMITED mode devices (<code>{@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == LIMITED</code>).</p>
964      * <p>This key is available on all devices.</p>
965      *
966      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
967      * @hide
968      */
969     public static final Key<int[]> REQUEST_MAX_NUM_OUTPUT_STREAMS =
970             new Key<int[]>("android.request.maxNumOutputStreams", int[].class);
971 
972     /**
973      * <p>The maximum numbers of different types of output streams
974      * that can be configured and used simultaneously by a camera device
975      * for any <code>RAW</code> formats.</p>
976      * <p>This value contains the max number of output simultaneous
977      * streams from the raw sensor.</p>
978      * <p>This lists the upper bound of the number of output streams supported by
979      * the camera device. Using more streams simultaneously may require more hardware and
980      * CPU resources that will consume more power. The image format for this kind of an output stream can
981      * be any <code>RAW</code> and supported format provided by {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap}.</p>
982      * <p>In particular, a <code>RAW</code> format is typically one of:</p>
983      * <ul>
984      * <li>ImageFormat#RAW_SENSOR</li>
985      * <li>ImageFormat#RAW10</li>
986      * <li>Opaque <code>RAW</code></li>
987      * </ul>
988      * <p>LEGACY mode devices ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} <code>==</code> LEGACY)
989      * never support raw streams.</p>
990      * <p><b>Range of valid values:</b><br></p>
991      * <p>&gt;= 0</p>
992      * <p>This key is available on all devices.</p>
993      *
994      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
995      * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP
996      */
997     @PublicKey
998     @SyntheticKey
999     public static final Key<Integer> REQUEST_MAX_NUM_OUTPUT_RAW =
1000             new Key<Integer>("android.request.maxNumOutputRaw", int.class);
1001 
1002     /**
1003      * <p>The maximum numbers of different types of output streams
1004      * that can be configured and used simultaneously by a camera device
1005      * for any processed (but not-stalling) formats.</p>
1006      * <p>This value contains the max number of output simultaneous
1007      * streams for any processed (but not-stalling) formats.</p>
1008      * <p>This lists the upper bound of the number of output streams supported by
1009      * the camera device. Using more streams simultaneously may require more hardware and
1010      * CPU resources that will consume more power. The image format for this kind of an output stream can
1011      * be any non-<code>RAW</code> and supported format provided by {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap}.</p>
1012      * <p>Processed (but not-stalling) is defined as any non-RAW format without a stall duration.
1013      * Typically:</p>
1014      * <ul>
1015      * <li>ImageFormat#YUV_420_888</li>
1016      * <li>ImageFormat#NV21</li>
1017      * <li>ImageFormat#YV12</li>
1018      * <li>Implementation-defined formats, i.e. StreamConfiguration#isOutputSupportedFor(Class)</li>
1019      * </ul>
1020      * <p>For full guarantees, query StreamConfigurationMap#getOutputStallDuration with
1021      * a processed format -- it will return 0 for a non-stalling stream.</p>
1022      * <p>LEGACY devices will support at least 2 processing/non-stalling streams.</p>
1023      * <p><b>Range of valid values:</b><br></p>
1024      * <p>&gt;= 3
1025      * for FULL mode devices (<code>{@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == FULL</code>);
1026      * &gt;= 2 for LIMITED mode devices (<code>{@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == LIMITED</code>).</p>
1027      * <p>This key is available on all devices.</p>
1028      *
1029      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1030      * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP
1031      */
1032     @PublicKey
1033     @SyntheticKey
1034     public static final Key<Integer> REQUEST_MAX_NUM_OUTPUT_PROC =
1035             new Key<Integer>("android.request.maxNumOutputProc", int.class);
1036 
1037     /**
1038      * <p>The maximum numbers of different types of output streams
1039      * that can be configured and used simultaneously by a camera device
1040      * for any processed (and stalling) formats.</p>
1041      * <p>This value contains the max number of output simultaneous
1042      * streams for any processed (but not-stalling) formats.</p>
1043      * <p>This lists the upper bound of the number of output streams supported by
1044      * the camera device. Using more streams simultaneously may require more hardware and
1045      * CPU resources that will consume more power. The image format for this kind of an output stream can
1046      * be any non-<code>RAW</code> and supported format provided by {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap}.</p>
1047      * <p>A processed and stalling format is defined as any non-RAW format with a stallDurations &gt; 0.
1048      * Typically only the <code>JPEG</code> format (ImageFormat#JPEG) is a stalling format.</p>
1049      * <p>For full guarantees, query StreamConfigurationMap#getOutputStallDuration with
1050      * a processed format -- it will return a non-0 value for a stalling stream.</p>
1051      * <p>LEGACY devices will support up to 1 processing/stalling stream.</p>
1052      * <p><b>Range of valid values:</b><br></p>
1053      * <p>&gt;= 1</p>
1054      * <p>This key is available on all devices.</p>
1055      *
1056      * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP
1057      */
1058     @PublicKey
1059     @SyntheticKey
1060     public static final Key<Integer> REQUEST_MAX_NUM_OUTPUT_PROC_STALLING =
1061             new Key<Integer>("android.request.maxNumOutputProcStalling", int.class);
1062 
1063     /**
1064      * <p>The maximum numbers of any type of input streams
1065      * that can be configured and used simultaneously by a camera device.</p>
1066      * <p>When set to 0, it means no input stream is supported.</p>
1067      * <p>The image format for a input stream can be any supported
1068      * format provided by
1069      * android.scaler.availableInputOutputFormatsMap. When using an
1070      * input stream, there must be at least one output stream
1071      * configured to to receive the reprocessed images.</p>
1072      * <p>For example, for Zero Shutter Lag (ZSL) still capture use case, the input
1073      * stream image format will be RAW_OPAQUE, the associated output stream image format
1074      * should be JPEG.</p>
1075      * <p><b>Range of valid values:</b><br></p>
1076      * <p>0 or 1.</p>
1077      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1078      * <p><b>Full capability</b> -
1079      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1080      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1081      *
1082      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1083      * @hide
1084      */
1085     public static final Key<Integer> REQUEST_MAX_NUM_INPUT_STREAMS =
1086             new Key<Integer>("android.request.maxNumInputStreams", int.class);
1087 
1088     /**
1089      * <p>Specifies the number of maximum pipeline stages a frame
1090      * has to go through from when it's exposed to when it's available
1091      * to the framework.</p>
1092      * <p>A typical minimum value for this is 2 (one stage to expose,
1093      * one stage to readout) from the sensor. The ISP then usually adds
1094      * its own stages to do custom HW processing. Further stages may be
1095      * added by SW processing.</p>
1096      * <p>Depending on what settings are used (e.g. YUV, JPEG) and what
1097      * processing is enabled (e.g. face detection), the actual pipeline
1098      * depth (specified by {@link CaptureResult#REQUEST_PIPELINE_DEPTH android.request.pipelineDepth}) may be less than
1099      * the max pipeline depth.</p>
1100      * <p>A pipeline depth of X stages is equivalent to a pipeline latency of
1101      * X frame intervals.</p>
1102      * <p>This value will be 8 or less.</p>
1103      * <p>This key is available on all devices.</p>
1104      *
1105      * @see CaptureResult#REQUEST_PIPELINE_DEPTH
1106      */
1107     @PublicKey
1108     public static final Key<Byte> REQUEST_PIPELINE_MAX_DEPTH =
1109             new Key<Byte>("android.request.pipelineMaxDepth", byte.class);
1110 
1111     /**
1112      * <p>Defines how many sub-components
1113      * a result will be composed of.</p>
1114      * <p>In order to combat the pipeline latency, partial results
1115      * may be delivered to the application layer from the camera device as
1116      * soon as they are available.</p>
1117      * <p>Optional; defaults to 1. A value of 1 means that partial
1118      * results are not supported, and only the final TotalCaptureResult will
1119      * be produced by the camera device.</p>
1120      * <p>A typical use case for this might be: after requesting an
1121      * auto-focus (AF) lock the new AF state might be available 50%
1122      * of the way through the pipeline.  The camera device could
1123      * then immediately dispatch this state via a partial result to
1124      * the application, and the rest of the metadata via later
1125      * partial results.</p>
1126      * <p><b>Range of valid values:</b><br>
1127      * &gt;= 1</p>
1128      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1129      */
1130     @PublicKey
1131     public static final Key<Integer> REQUEST_PARTIAL_RESULT_COUNT =
1132             new Key<Integer>("android.request.partialResultCount", int.class);
1133 
1134     /**
1135      * <p>List of capabilities that this camera device
1136      * advertises as fully supporting.</p>
1137      * <p>A capability is a contract that the camera device makes in order
1138      * to be able to satisfy one or more use cases.</p>
1139      * <p>Listing a capability guarantees that the whole set of features
1140      * required to support a common use will all be available.</p>
1141      * <p>Using a subset of the functionality provided by an unsupported
1142      * capability may be possible on a specific camera device implementation;
1143      * to do this query each of android.request.availableRequestKeys,
1144      * android.request.availableResultKeys,
1145      * android.request.availableCharacteristicsKeys.</p>
1146      * <p>The following capabilities are guaranteed to be available on
1147      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} <code>==</code> FULL devices:</p>
1148      * <ul>
1149      * <li>MANUAL_SENSOR</li>
1150      * <li>MANUAL_POST_PROCESSING</li>
1151      * </ul>
1152      * <p>Other capabilities may be available on either FULL or LIMITED
1153      * devices, but the application should query this key to be sure.</p>
1154      * <p><b>Possible values:</b>
1155      * <ul>
1156      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE BACKWARD_COMPATIBLE}</li>
1157      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR MANUAL_SENSOR}</li>
1158      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING MANUAL_POST_PROCESSING}</li>
1159      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_RAW RAW}</li>
1160      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS READ_SENSOR_SETTINGS}</li>
1161      *   <li>{@link #REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE BURST_CAPTURE}</li>
1162      * </ul></p>
1163      * <p>This key is available on all devices.</p>
1164      *
1165      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1166      * @see #REQUEST_AVAILABLE_CAPABILITIES_BACKWARD_COMPATIBLE
1167      * @see #REQUEST_AVAILABLE_CAPABILITIES_MANUAL_SENSOR
1168      * @see #REQUEST_AVAILABLE_CAPABILITIES_MANUAL_POST_PROCESSING
1169      * @see #REQUEST_AVAILABLE_CAPABILITIES_RAW
1170      * @see #REQUEST_AVAILABLE_CAPABILITIES_READ_SENSOR_SETTINGS
1171      * @see #REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE
1172      */
1173     @PublicKey
1174     public static final Key<int[]> REQUEST_AVAILABLE_CAPABILITIES =
1175             new Key<int[]>("android.request.availableCapabilities", int[].class);
1176 
1177     /**
1178      * <p>A list of all keys that the camera device has available
1179      * to use with CaptureRequest.</p>
1180      * <p>Attempting to set a key into a CaptureRequest that is not
1181      * listed here will result in an invalid request and will be rejected
1182      * by the camera device.</p>
1183      * <p>This field can be used to query the feature set of a camera device
1184      * at a more granular level than capabilities. This is especially
1185      * important for optional keys that are not listed under any capability
1186      * in {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}.</p>
1187      * <p>This key is available on all devices.</p>
1188      *
1189      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
1190      * @hide
1191      */
1192     public static final Key<int[]> REQUEST_AVAILABLE_REQUEST_KEYS =
1193             new Key<int[]>("android.request.availableRequestKeys", int[].class);
1194 
1195     /**
1196      * <p>A list of all keys that the camera device has available
1197      * to use with CaptureResult.</p>
1198      * <p>Attempting to get a key from a CaptureResult that is not
1199      * listed here will always return a <code>null</code> value. Getting a key from
1200      * a CaptureResult that is listed here will generally never return a <code>null</code>
1201      * value.</p>
1202      * <p>The following keys may return <code>null</code> unless they are enabled:</p>
1203      * <ul>
1204      * <li>android.statistics.lensShadingMap (non-null iff {@link CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE android.statistics.lensShadingMapMode} == ON)</li>
1205      * </ul>
1206      * <p>(Those sometimes-null keys will nevertheless be listed here
1207      * if they are available.)</p>
1208      * <p>This field can be used to query the feature set of a camera device
1209      * at a more granular level than capabilities. This is especially
1210      * important for optional keys that are not listed under any capability
1211      * in {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}.</p>
1212      * <p>This key is available on all devices.</p>
1213      *
1214      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
1215      * @see CaptureRequest#STATISTICS_LENS_SHADING_MAP_MODE
1216      * @hide
1217      */
1218     public static final Key<int[]> REQUEST_AVAILABLE_RESULT_KEYS =
1219             new Key<int[]>("android.request.availableResultKeys", int[].class);
1220 
1221     /**
1222      * <p>A list of all keys that the camera device has available
1223      * to use with CameraCharacteristics.</p>
1224      * <p>This entry follows the same rules as
1225      * android.request.availableResultKeys (except that it applies for
1226      * CameraCharacteristics instead of CaptureResult). See above for more
1227      * details.</p>
1228      * <p>This key is available on all devices.</p>
1229      * @hide
1230      */
1231     public static final Key<int[]> REQUEST_AVAILABLE_CHARACTERISTICS_KEYS =
1232             new Key<int[]>("android.request.availableCharacteristicsKeys", int[].class);
1233 
1234     /**
1235      * <p>The list of image formats that are supported by this
1236      * camera device for output streams.</p>
1237      * <p>All camera devices will support JPEG and YUV_420_888 formats.</p>
1238      * <p>When set to YUV_420_888, application can access the YUV420 data directly.</p>
1239      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1240      * @deprecated
1241      * @hide
1242      */
1243     @Deprecated
1244     public static final Key<int[]> SCALER_AVAILABLE_FORMATS =
1245             new Key<int[]>("android.scaler.availableFormats", int[].class);
1246 
1247     /**
1248      * <p>The minimum frame duration that is supported
1249      * for each resolution in android.scaler.availableJpegSizes.</p>
1250      * <p>This corresponds to the minimum steady-state frame duration when only
1251      * that JPEG stream is active and captured in a burst, with all
1252      * processing (typically in android.*.mode) set to FAST.</p>
1253      * <p>When multiple streams are configured, the minimum
1254      * frame duration will be &gt;= max(individual stream min
1255      * durations)</p>
1256      * <p><b>Units</b>: Nanoseconds</p>
1257      * <p><b>Range of valid values:</b><br>
1258      * TODO: Remove property.</p>
1259      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1260      * @deprecated
1261      * @hide
1262      */
1263     @Deprecated
1264     public static final Key<long[]> SCALER_AVAILABLE_JPEG_MIN_DURATIONS =
1265             new Key<long[]>("android.scaler.availableJpegMinDurations", long[].class);
1266 
1267     /**
1268      * <p>The JPEG resolutions that are supported by this camera device.</p>
1269      * <p>The resolutions are listed as <code>(width, height)</code> pairs. All camera devices will support
1270      * sensor maximum resolution (defined by {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}).</p>
1271      * <p><b>Range of valid values:</b><br>
1272      * TODO: Remove property.</p>
1273      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1274      *
1275      * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
1276      * @deprecated
1277      * @hide
1278      */
1279     @Deprecated
1280     public static final Key<android.util.Size[]> SCALER_AVAILABLE_JPEG_SIZES =
1281             new Key<android.util.Size[]>("android.scaler.availableJpegSizes", android.util.Size[].class);
1282 
1283     /**
1284      * <p>The maximum ratio between both active area width
1285      * and crop region width, and active area height and
1286      * crop region height, for {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}.</p>
1287      * <p>This represents the maximum amount of zooming possible by
1288      * the camera device, or equivalently, the minimum cropping
1289      * window size.</p>
1290      * <p>Crop regions that have a width or height that is smaller
1291      * than this ratio allows will be rounded up to the minimum
1292      * allowed size by the camera device.</p>
1293      * <p><b>Units</b>: Zoom scale factor</p>
1294      * <p><b>Range of valid values:</b><br>
1295      * &gt;=1</p>
1296      * <p>This key is available on all devices.</p>
1297      *
1298      * @see CaptureRequest#SCALER_CROP_REGION
1299      */
1300     @PublicKey
1301     public static final Key<Float> SCALER_AVAILABLE_MAX_DIGITAL_ZOOM =
1302             new Key<Float>("android.scaler.availableMaxDigitalZoom", float.class);
1303 
1304     /**
1305      * <p>For each available processed output size (defined in
1306      * android.scaler.availableProcessedSizes), this property lists the
1307      * minimum supportable frame duration for that size.</p>
1308      * <p>This should correspond to the frame duration when only that processed
1309      * stream is active, with all processing (typically in android.*.mode)
1310      * set to FAST.</p>
1311      * <p>When multiple streams are configured, the minimum frame duration will
1312      * be &gt;= max(individual stream min durations).</p>
1313      * <p><b>Units</b>: Nanoseconds</p>
1314      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1315      * @deprecated
1316      * @hide
1317      */
1318     @Deprecated
1319     public static final Key<long[]> SCALER_AVAILABLE_PROCESSED_MIN_DURATIONS =
1320             new Key<long[]>("android.scaler.availableProcessedMinDurations", long[].class);
1321 
1322     /**
1323      * <p>The resolutions available for use with
1324      * processed output streams, such as YV12, NV12, and
1325      * platform opaque YUV/RGB streams to the GPU or video
1326      * encoders.</p>
1327      * <p>The resolutions are listed as <code>(width, height)</code> pairs.</p>
1328      * <p>For a given use case, the actual maximum supported resolution
1329      * may be lower than what is listed here, depending on the destination
1330      * Surface for the image data. For example, for recording video,
1331      * the video encoder chosen may have a maximum size limit (e.g. 1080p)
1332      * smaller than what the camera (e.g. maximum resolution is 3264x2448)
1333      * can provide.</p>
1334      * <p>Please reference the documentation for the image data destination to
1335      * check if it limits the maximum size for image data.</p>
1336      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1337      * @deprecated
1338      * @hide
1339      */
1340     @Deprecated
1341     public static final Key<android.util.Size[]> SCALER_AVAILABLE_PROCESSED_SIZES =
1342             new Key<android.util.Size[]>("android.scaler.availableProcessedSizes", android.util.Size[].class);
1343 
1344     /**
1345      * <p>The mapping of image formats that are supported by this
1346      * camera device for input streams, to their corresponding output formats.</p>
1347      * <p>All camera devices with at least 1
1348      * android.request.maxNumInputStreams will have at least one
1349      * available input format.</p>
1350      * <p>The camera device will support the following map of formats,
1351      * if its dependent capability is supported:</p>
1352      * <table>
1353      * <thead>
1354      * <tr>
1355      * <th align="left">Input Format</th>
1356      * <th align="left">Output Format</th>
1357      * <th align="left">Capability</th>
1358      * </tr>
1359      * </thead>
1360      * <tbody>
1361      * <tr>
1362      * <td align="left">RAW_OPAQUE</td>
1363      * <td align="left">JPEG</td>
1364      * <td align="left">ZSL</td>
1365      * </tr>
1366      * <tr>
1367      * <td align="left">RAW_OPAQUE</td>
1368      * <td align="left">YUV_420_888</td>
1369      * <td align="left">ZSL</td>
1370      * </tr>
1371      * <tr>
1372      * <td align="left">RAW_OPAQUE</td>
1373      * <td align="left">RAW16</td>
1374      * <td align="left">RAW</td>
1375      * </tr>
1376      * <tr>
1377      * <td align="left">RAW16</td>
1378      * <td align="left">YUV_420_888</td>
1379      * <td align="left">RAW</td>
1380      * </tr>
1381      * <tr>
1382      * <td align="left">RAW16</td>
1383      * <td align="left">JPEG</td>
1384      * <td align="left">RAW</td>
1385      * </tr>
1386      * </tbody>
1387      * </table>
1388      * <p>For ZSL-capable camera devices, using the RAW_OPAQUE format
1389      * as either input or output will never hurt maximum frame rate (i.e.
1390      * StreamConfigurationMap#getOutputStallDuration(int,Size)
1391      * for a <code>format =</code> RAW_OPAQUE is always 0).</p>
1392      * <p>Attempting to configure an input stream with output streams not
1393      * listed as available in this map is not valid.</p>
1394      * <p>TODO: typedef to ReprocessFormatMap</p>
1395      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1396      * <p><b>Full capability</b> -
1397      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1398      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1399      *
1400      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1401      * @hide
1402      */
1403     public static final Key<int[]> SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP =
1404             new Key<int[]>("android.scaler.availableInputOutputFormatsMap", int[].class);
1405 
1406     /**
1407      * <p>The available stream configurations that this
1408      * camera device supports
1409      * (i.e. format, width, height, output/input stream).</p>
1410      * <p>The configurations are listed as <code>(format, width, height, input?)</code>
1411      * tuples.</p>
1412      * <p>For a given use case, the actual maximum supported resolution
1413      * may be lower than what is listed here, depending on the destination
1414      * Surface for the image data. For example, for recording video,
1415      * the video encoder chosen may have a maximum size limit (e.g. 1080p)
1416      * smaller than what the camera (e.g. maximum resolution is 3264x2448)
1417      * can provide.</p>
1418      * <p>Please reference the documentation for the image data destination to
1419      * check if it limits the maximum size for image data.</p>
1420      * <p>Not all output formats may be supported in a configuration with
1421      * an input stream of a particular format. For more details, see
1422      * android.scaler.availableInputOutputFormatsMap.</p>
1423      * <p>The following table describes the minimum required output stream
1424      * configurations based on the hardware level
1425      * ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel}):</p>
1426      * <table>
1427      * <thead>
1428      * <tr>
1429      * <th align="center">Format</th>
1430      * <th align="center">Size</th>
1431      * <th align="center">Hardware Level</th>
1432      * <th align="center">Notes</th>
1433      * </tr>
1434      * </thead>
1435      * <tbody>
1436      * <tr>
1437      * <td align="center">JPEG</td>
1438      * <td align="center">{@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}</td>
1439      * <td align="center">Any</td>
1440      * <td align="center"></td>
1441      * </tr>
1442      * <tr>
1443      * <td align="center">JPEG</td>
1444      * <td align="center">1920x1080 (1080p)</td>
1445      * <td align="center">Any</td>
1446      * <td align="center">if 1080p &lt;= activeArraySize</td>
1447      * </tr>
1448      * <tr>
1449      * <td align="center">JPEG</td>
1450      * <td align="center">1280x720 (720)</td>
1451      * <td align="center">Any</td>
1452      * <td align="center">if 720p &lt;= activeArraySize</td>
1453      * </tr>
1454      * <tr>
1455      * <td align="center">JPEG</td>
1456      * <td align="center">640x480 (480p)</td>
1457      * <td align="center">Any</td>
1458      * <td align="center">if 480p &lt;= activeArraySize</td>
1459      * </tr>
1460      * <tr>
1461      * <td align="center">JPEG</td>
1462      * <td align="center">320x240 (240p)</td>
1463      * <td align="center">Any</td>
1464      * <td align="center">if 240p &lt;= activeArraySize</td>
1465      * </tr>
1466      * <tr>
1467      * <td align="center">YUV_420_888</td>
1468      * <td align="center">all output sizes available for JPEG</td>
1469      * <td align="center">FULL</td>
1470      * <td align="center"></td>
1471      * </tr>
1472      * <tr>
1473      * <td align="center">YUV_420_888</td>
1474      * <td align="center">all output sizes available for JPEG, up to the maximum video size</td>
1475      * <td align="center">LIMITED</td>
1476      * <td align="center"></td>
1477      * </tr>
1478      * <tr>
1479      * <td align="center">IMPLEMENTATION_DEFINED</td>
1480      * <td align="center">same as YUV_420_888</td>
1481      * <td align="center">Any</td>
1482      * <td align="center"></td>
1483      * </tr>
1484      * </tbody>
1485      * </table>
1486      * <p>Refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} for additional
1487      * mandatory stream configurations on a per-capability basis.</p>
1488      * <p>This key is available on all devices.</p>
1489      *
1490      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1491      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
1492      * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
1493      * @hide
1494      */
1495     public static final Key<android.hardware.camera2.params.StreamConfiguration[]> SCALER_AVAILABLE_STREAM_CONFIGURATIONS =
1496             new Key<android.hardware.camera2.params.StreamConfiguration[]>("android.scaler.availableStreamConfigurations", android.hardware.camera2.params.StreamConfiguration[].class);
1497 
1498     /**
1499      * <p>This lists the minimum frame duration for each
1500      * format/size combination.</p>
1501      * <p>This should correspond to the frame duration when only that
1502      * stream is active, with all processing (typically in android.*.mode)
1503      * set to either OFF or FAST.</p>
1504      * <p>When multiple streams are used in a request, the minimum frame
1505      * duration will be max(individual stream min durations).</p>
1506      * <p>The minimum frame duration of a stream (of a particular format, size)
1507      * is the same regardless of whether the stream is input or output.</p>
1508      * <p>See {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} and
1509      * android.scaler.availableStallDurations for more details about
1510      * calculating the max frame rate.</p>
1511      * <p>(Keep in sync with
1512      * StreamConfigurationMap#getOutputMinFrameDuration)</p>
1513      * <p><b>Units</b>: (format, width, height, ns) x n</p>
1514      * <p>This key is available on all devices.</p>
1515      *
1516      * @see CaptureRequest#SENSOR_FRAME_DURATION
1517      * @hide
1518      */
1519     public static final Key<android.hardware.camera2.params.StreamConfigurationDuration[]> SCALER_AVAILABLE_MIN_FRAME_DURATIONS =
1520             new Key<android.hardware.camera2.params.StreamConfigurationDuration[]>("android.scaler.availableMinFrameDurations", android.hardware.camera2.params.StreamConfigurationDuration[].class);
1521 
1522     /**
1523      * <p>This lists the maximum stall duration for each
1524      * format/size combination.</p>
1525      * <p>A stall duration is how much extra time would get added
1526      * to the normal minimum frame duration for a repeating request
1527      * that has streams with non-zero stall.</p>
1528      * <p>For example, consider JPEG captures which have the following
1529      * characteristics:</p>
1530      * <ul>
1531      * <li>JPEG streams act like processed YUV streams in requests for which
1532      * they are not included; in requests in which they are directly
1533      * referenced, they act as JPEG streams. This is because supporting a
1534      * JPEG stream requires the underlying YUV data to always be ready for
1535      * use by a JPEG encoder, but the encoder will only be used (and impact
1536      * frame duration) on requests that actually reference a JPEG stream.</li>
1537      * <li>The JPEG processor can run concurrently to the rest of the camera
1538      * pipeline, but cannot process more than 1 capture at a time.</li>
1539      * </ul>
1540      * <p>In other words, using a repeating YUV request would result
1541      * in a steady frame rate (let's say it's 30 FPS). If a single
1542      * JPEG request is submitted periodically, the frame rate will stay
1543      * at 30 FPS (as long as we wait for the previous JPEG to return each
1544      * time). If we try to submit a repeating YUV + JPEG request, then
1545      * the frame rate will drop from 30 FPS.</p>
1546      * <p>In general, submitting a new request with a non-0 stall time
1547      * stream will <em>not</em> cause a frame rate drop unless there are still
1548      * outstanding buffers for that stream from previous requests.</p>
1549      * <p>Submitting a repeating request with streams (call this <code>S</code>)
1550      * is the same as setting the minimum frame duration from
1551      * the normal minimum frame duration corresponding to <code>S</code>, added with
1552      * the maximum stall duration for <code>S</code>.</p>
1553      * <p>If interleaving requests with and without a stall duration,
1554      * a request will stall by the maximum of the remaining times
1555      * for each can-stall stream with outstanding buffers.</p>
1556      * <p>This means that a stalling request will not have an exposure start
1557      * until the stall has completed.</p>
1558      * <p>This should correspond to the stall duration when only that stream is
1559      * active, with all processing (typically in android.*.mode) set to FAST
1560      * or OFF. Setting any of the processing modes to HIGH_QUALITY
1561      * effectively results in an indeterminate stall duration for all
1562      * streams in a request (the regular stall calculation rules are
1563      * ignored).</p>
1564      * <p>The following formats may always have a stall duration:</p>
1565      * <ul>
1566      * <li>ImageFormat#JPEG</li>
1567      * <li>ImageFormat#RAW_SENSOR</li>
1568      * </ul>
1569      * <p>The following formats will never have a stall duration:</p>
1570      * <ul>
1571      * <li>ImageFormat#YUV_420_888</li>
1572      * </ul>
1573      * <p>All other formats may or may not have an allowed stall duration on
1574      * a per-capability basis; refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}
1575      * for more details.</p>
1576      * <p>See {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} for more information about
1577      * calculating the max frame rate (absent stalls).</p>
1578      * <p>(Keep up to date with
1579      * StreamConfigurationMap#getOutputStallDuration(int, Size) )</p>
1580      * <p><b>Units</b>: (format, width, height, ns) x n</p>
1581      * <p>This key is available on all devices.</p>
1582      *
1583      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
1584      * @see CaptureRequest#SENSOR_FRAME_DURATION
1585      * @hide
1586      */
1587     public static final Key<android.hardware.camera2.params.StreamConfigurationDuration[]> SCALER_AVAILABLE_STALL_DURATIONS =
1588             new Key<android.hardware.camera2.params.StreamConfigurationDuration[]>("android.scaler.availableStallDurations", android.hardware.camera2.params.StreamConfigurationDuration[].class);
1589 
1590     /**
1591      * <p>The available stream configurations that this
1592      * camera device supports; also includes the minimum frame durations
1593      * and the stall durations for each format/size combination.</p>
1594      * <p>All camera devices will support sensor maximum resolution (defined by
1595      * {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}) for the JPEG format.</p>
1596      * <p>For a given use case, the actual maximum supported resolution
1597      * may be lower than what is listed here, depending on the destination
1598      * Surface for the image data. For example, for recording video,
1599      * the video encoder chosen may have a maximum size limit (e.g. 1080p)
1600      * smaller than what the camera (e.g. maximum resolution is 3264x2448)
1601      * can provide.</p>
1602      * <p>Please reference the documentation for the image data destination to
1603      * check if it limits the maximum size for image data.</p>
1604      * <p>The following table describes the minimum required output stream
1605      * configurations based on the hardware level
1606      * ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel}):</p>
1607      * <table>
1608      * <thead>
1609      * <tr>
1610      * <th align="center">Format</th>
1611      * <th align="center">Size</th>
1612      * <th align="center">Hardware Level</th>
1613      * <th align="center">Notes</th>
1614      * </tr>
1615      * </thead>
1616      * <tbody>
1617      * <tr>
1618      * <td align="center">JPEG</td>
1619      * <td align="center">{@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize}</td>
1620      * <td align="center">Any</td>
1621      * <td align="center"></td>
1622      * </tr>
1623      * <tr>
1624      * <td align="center">JPEG</td>
1625      * <td align="center">1920x1080 (1080p)</td>
1626      * <td align="center">Any</td>
1627      * <td align="center">if 1080p &lt;= activeArraySize</td>
1628      * </tr>
1629      * <tr>
1630      * <td align="center">JPEG</td>
1631      * <td align="center">1280x720 (720)</td>
1632      * <td align="center">Any</td>
1633      * <td align="center">if 720p &lt;= activeArraySize</td>
1634      * </tr>
1635      * <tr>
1636      * <td align="center">JPEG</td>
1637      * <td align="center">640x480 (480p)</td>
1638      * <td align="center">Any</td>
1639      * <td align="center">if 480p &lt;= activeArraySize</td>
1640      * </tr>
1641      * <tr>
1642      * <td align="center">JPEG</td>
1643      * <td align="center">320x240 (240p)</td>
1644      * <td align="center">Any</td>
1645      * <td align="center">if 240p &lt;= activeArraySize</td>
1646      * </tr>
1647      * <tr>
1648      * <td align="center">YUV_420_888</td>
1649      * <td align="center">all output sizes available for JPEG</td>
1650      * <td align="center">FULL</td>
1651      * <td align="center"></td>
1652      * </tr>
1653      * <tr>
1654      * <td align="center">YUV_420_888</td>
1655      * <td align="center">all output sizes available for JPEG, up to the maximum video size</td>
1656      * <td align="center">LIMITED</td>
1657      * <td align="center"></td>
1658      * </tr>
1659      * <tr>
1660      * <td align="center">IMPLEMENTATION_DEFINED</td>
1661      * <td align="center">same as YUV_420_888</td>
1662      * <td align="center">Any</td>
1663      * <td align="center"></td>
1664      * </tr>
1665      * </tbody>
1666      * </table>
1667      * <p>Refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} for additional
1668      * mandatory stream configurations on a per-capability basis.</p>
1669      * <p>This key is available on all devices.</p>
1670      *
1671      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1672      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
1673      * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
1674      */
1675     @PublicKey
1676     @SyntheticKey
1677     public static final Key<android.hardware.camera2.params.StreamConfigurationMap> SCALER_STREAM_CONFIGURATION_MAP =
1678             new Key<android.hardware.camera2.params.StreamConfigurationMap>("android.scaler.streamConfigurationMap", android.hardware.camera2.params.StreamConfigurationMap.class);
1679 
1680     /**
1681      * <p>The crop type that this camera device supports.</p>
1682      * <p>When passing a non-centered crop region ({@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}) to a camera
1683      * device that only supports CENTER_ONLY cropping, the camera device will move the
1684      * crop region to the center of the sensor active array ({@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize})
1685      * and keep the crop region width and height unchanged. The camera device will return the
1686      * final used crop region in metadata result {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}.</p>
1687      * <p>Camera devices that support FREEFORM cropping will support any crop region that
1688      * is inside of the active array. The camera device will apply the same crop region and
1689      * return the final used crop region in capture result metadata {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}.</p>
1690      * <p>FULL capability devices ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} <code>==</code> FULL) will support
1691      * FREEFORM cropping. LEGACY capability devices will only support CENTER_ONLY cropping.</p>
1692      * <p><b>Possible values:</b>
1693      * <ul>
1694      *   <li>{@link #SCALER_CROPPING_TYPE_CENTER_ONLY CENTER_ONLY}</li>
1695      *   <li>{@link #SCALER_CROPPING_TYPE_FREEFORM FREEFORM}</li>
1696      * </ul></p>
1697      * <p>This key is available on all devices.</p>
1698      *
1699      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1700      * @see CaptureRequest#SCALER_CROP_REGION
1701      * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
1702      * @see #SCALER_CROPPING_TYPE_CENTER_ONLY
1703      * @see #SCALER_CROPPING_TYPE_FREEFORM
1704      */
1705     @PublicKey
1706     public static final Key<Integer> SCALER_CROPPING_TYPE =
1707             new Key<Integer>("android.scaler.croppingType", int.class);
1708 
1709     /**
1710      * <p>The area of the image sensor which corresponds to
1711      * active pixels.</p>
1712      * <p>This is the region of the sensor that actually receives light from the scene.
1713      * Therefore, the size of this region determines the maximum field of view and the maximum
1714      * number of pixels that an image from this sensor can contain.</p>
1715      * <p>The rectangle is defined in terms of the full pixel array; (0,0) is the top-left of the
1716      * full pixel array, and the size of the full pixel array is given by
1717      * {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}.</p>
1718      * <p>Most other keys listing pixel coordinates have their coordinate systems based on the
1719      * active array, with <code>(0, 0)</code> being the top-left of the active array rectangle.</p>
1720      * <p>The active array may be smaller than the full pixel array, since the full array may
1721      * include black calibration pixels or other inactive regions.</p>
1722      * <p><b>Units</b>: Pixel coordinates on the image sensor</p>
1723      * <p><b>Range of valid values:</b><br></p>
1724      * <p>This key is available on all devices.</p>
1725      *
1726      * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE
1727      */
1728     @PublicKey
1729     public static final Key<android.graphics.Rect> SENSOR_INFO_ACTIVE_ARRAY_SIZE =
1730             new Key<android.graphics.Rect>("android.sensor.info.activeArraySize", android.graphics.Rect.class);
1731 
1732     /**
1733      * <p>Range of sensitivities for {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity} supported by this
1734      * camera device.</p>
1735      * <p>The values are the standard ISO sensitivity values,
1736      * as defined in ISO 12232:2006.</p>
1737      * <p><b>Range of valid values:</b><br>
1738      * Min &lt;= 100, Max &gt;= 800</p>
1739      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1740      * <p><b>Full capability</b> -
1741      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1742      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1743      *
1744      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1745      * @see CaptureRequest#SENSOR_SENSITIVITY
1746      */
1747     @PublicKey
1748     public static final Key<android.util.Range<Integer>> SENSOR_INFO_SENSITIVITY_RANGE =
1749             new Key<android.util.Range<Integer>>("android.sensor.info.sensitivityRange", new TypeReference<android.util.Range<Integer>>() {{ }});
1750 
1751     /**
1752      * <p>The arrangement of color filters on sensor;
1753      * represents the colors in the top-left 2x2 section of
1754      * the sensor, in reading order.</p>
1755      * <p><b>Possible values:</b>
1756      * <ul>
1757      *   <li>{@link #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGGB RGGB}</li>
1758      *   <li>{@link #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GRBG GRBG}</li>
1759      *   <li>{@link #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GBRG GBRG}</li>
1760      *   <li>{@link #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_BGGR BGGR}</li>
1761      *   <li>{@link #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGB RGB}</li>
1762      * </ul></p>
1763      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1764      * <p><b>Full capability</b> -
1765      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1766      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1767      *
1768      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1769      * @see #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGGB
1770      * @see #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GRBG
1771      * @see #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_GBRG
1772      * @see #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_BGGR
1773      * @see #SENSOR_INFO_COLOR_FILTER_ARRANGEMENT_RGB
1774      */
1775     @PublicKey
1776     public static final Key<Integer> SENSOR_INFO_COLOR_FILTER_ARRANGEMENT =
1777             new Key<Integer>("android.sensor.info.colorFilterArrangement", int.class);
1778 
1779     /**
1780      * <p>The range of image exposure times for {@link CaptureRequest#SENSOR_EXPOSURE_TIME android.sensor.exposureTime} supported
1781      * by this camera device.</p>
1782      * <p><b>Units</b>: Nanoseconds</p>
1783      * <p><b>Range of valid values:</b><br>
1784      * The minimum exposure time will be less than 100 us. For FULL
1785      * capability devices ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == FULL),
1786      * the maximum exposure time will be greater than 100ms.</p>
1787      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1788      * <p><b>Full capability</b> -
1789      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1790      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1791      *
1792      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1793      * @see CaptureRequest#SENSOR_EXPOSURE_TIME
1794      */
1795     @PublicKey
1796     public static final Key<android.util.Range<Long>> SENSOR_INFO_EXPOSURE_TIME_RANGE =
1797             new Key<android.util.Range<Long>>("android.sensor.info.exposureTimeRange", new TypeReference<android.util.Range<Long>>() {{ }});
1798 
1799     /**
1800      * <p>The maximum possible frame duration (minimum frame rate) for
1801      * {@link CaptureRequest#SENSOR_FRAME_DURATION android.sensor.frameDuration} that is supported this camera device.</p>
1802      * <p>Attempting to use frame durations beyond the maximum will result in the frame
1803      * duration being clipped to the maximum. See that control for a full definition of frame
1804      * durations.</p>
1805      * <p>Refer to StreamConfigurationMap#getOutputMinFrameDuration(int,Size) for the minimum
1806      * frame duration values.</p>
1807      * <p><b>Units</b>: Nanoseconds</p>
1808      * <p><b>Range of valid values:</b><br>
1809      * For FULL capability devices
1810      * ({@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} == FULL), at least 100ms.</p>
1811      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1812      * <p><b>Full capability</b> -
1813      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
1814      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
1815      *
1816      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
1817      * @see CaptureRequest#SENSOR_FRAME_DURATION
1818      */
1819     @PublicKey
1820     public static final Key<Long> SENSOR_INFO_MAX_FRAME_DURATION =
1821             new Key<Long>("android.sensor.info.maxFrameDuration", long.class);
1822 
1823     /**
1824      * <p>The physical dimensions of the full pixel
1825      * array.</p>
1826      * <p>This is the physical size of the sensor pixel
1827      * array defined by {@link CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE android.sensor.info.pixelArraySize}.</p>
1828      * <p><b>Units</b>: Millimeters</p>
1829      * <p>This key is available on all devices.</p>
1830      *
1831      * @see CameraCharacteristics#SENSOR_INFO_PIXEL_ARRAY_SIZE
1832      */
1833     @PublicKey
1834     public static final Key<android.util.SizeF> SENSOR_INFO_PHYSICAL_SIZE =
1835             new Key<android.util.SizeF>("android.sensor.info.physicalSize", android.util.SizeF.class);
1836 
1837     /**
1838      * <p>Dimensions of the full pixel array, possibly
1839      * including black calibration pixels.</p>
1840      * <p>The pixel count of the full pixel array,
1841      * which covers {@link CameraCharacteristics#SENSOR_INFO_PHYSICAL_SIZE android.sensor.info.physicalSize} area.</p>
1842      * <p>If a camera device supports raw sensor formats, either this
1843      * or {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} is the maximum output
1844      * raw size listed in {@link CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP android.scaler.streamConfigurationMap}.
1845      * If a size corresponding to pixelArraySize is listed, the resulting
1846      * raw sensor image will include black pixels.</p>
1847      * <p>Some parts of the full pixel array may not receive light from the scene,
1848      * or are otherwise inactive.  The {@link CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE android.sensor.info.activeArraySize} key
1849      * defines the rectangle of active pixels that actually forms an image.</p>
1850      * <p><b>Units</b>: Pixels</p>
1851      * <p>This key is available on all devices.</p>
1852      *
1853      * @see CameraCharacteristics#SCALER_STREAM_CONFIGURATION_MAP
1854      * @see CameraCharacteristics#SENSOR_INFO_ACTIVE_ARRAY_SIZE
1855      * @see CameraCharacteristics#SENSOR_INFO_PHYSICAL_SIZE
1856      */
1857     @PublicKey
1858     public static final Key<android.util.Size> SENSOR_INFO_PIXEL_ARRAY_SIZE =
1859             new Key<android.util.Size>("android.sensor.info.pixelArraySize", android.util.Size.class);
1860 
1861     /**
1862      * <p>Maximum raw value output by sensor.</p>
1863      * <p>This specifies the fully-saturated encoding level for the raw
1864      * sample values from the sensor.  This is typically caused by the
1865      * sensor becoming highly non-linear or clipping. The minimum for
1866      * each channel is specified by the offset in the
1867      * {@link CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN android.sensor.blackLevelPattern} key.</p>
1868      * <p>The white level is typically determined either by sensor bit depth
1869      * (8-14 bits is expected), or by the point where the sensor response
1870      * becomes too non-linear to be useful.  The default value for this is
1871      * maximum representable value for a 16-bit raw sample (2^16 - 1).</p>
1872      * <p><b>Range of valid values:</b><br>
1873      * &gt; 255 (8-bit output)</p>
1874      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1875      *
1876      * @see CameraCharacteristics#SENSOR_BLACK_LEVEL_PATTERN
1877      */
1878     @PublicKey
1879     public static final Key<Integer> SENSOR_INFO_WHITE_LEVEL =
1880             new Key<Integer>("android.sensor.info.whiteLevel", int.class);
1881 
1882     /**
1883      * <p>The time base source for sensor capture start timestamps.</p>
1884      * <p>The timestamps provided for captures are always in nanoseconds and monotonic, but
1885      * may not based on a time source that can be compared to other system time sources.</p>
1886      * <p>This characteristic defines the source for the timestamps, and therefore whether they
1887      * can be compared against other system time sources/timestamps.</p>
1888      * <p><b>Possible values:</b>
1889      * <ul>
1890      *   <li>{@link #SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN UNKNOWN}</li>
1891      *   <li>{@link #SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME REALTIME}</li>
1892      * </ul></p>
1893      * <p>This key is available on all devices.</p>
1894      * @see #SENSOR_INFO_TIMESTAMP_SOURCE_UNKNOWN
1895      * @see #SENSOR_INFO_TIMESTAMP_SOURCE_REALTIME
1896      */
1897     @PublicKey
1898     public static final Key<Integer> SENSOR_INFO_TIMESTAMP_SOURCE =
1899             new Key<Integer>("android.sensor.info.timestampSource", int.class);
1900 
1901     /**
1902      * <p>The standard reference illuminant used as the scene light source when
1903      * calculating the {@link CameraCharacteristics#SENSOR_COLOR_TRANSFORM1 android.sensor.colorTransform1},
1904      * {@link CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM1 android.sensor.calibrationTransform1}, and
1905      * {@link CameraCharacteristics#SENSOR_FORWARD_MATRIX1 android.sensor.forwardMatrix1} matrices.</p>
1906      * <p>The values in this key correspond to the values defined for the
1907      * EXIF LightSource tag. These illuminants are standard light sources
1908      * that are often used calibrating camera devices.</p>
1909      * <p>If this key is present, then {@link CameraCharacteristics#SENSOR_COLOR_TRANSFORM1 android.sensor.colorTransform1},
1910      * {@link CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM1 android.sensor.calibrationTransform1}, and
1911      * {@link CameraCharacteristics#SENSOR_FORWARD_MATRIX1 android.sensor.forwardMatrix1} will also be present.</p>
1912      * <p>Some devices may choose to provide a second set of calibration
1913      * information for improved quality, including
1914      * {@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2 android.sensor.referenceIlluminant2} and its corresponding matrices.</p>
1915      * <p><b>Possible values:</b>
1916      * <ul>
1917      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT DAYLIGHT}</li>
1918      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_FLUORESCENT FLUORESCENT}</li>
1919      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_TUNGSTEN TUNGSTEN}</li>
1920      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_FLASH FLASH}</li>
1921      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_FINE_WEATHER FINE_WEATHER}</li>
1922      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_CLOUDY_WEATHER CLOUDY_WEATHER}</li>
1923      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_SHADE SHADE}</li>
1924      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT_FLUORESCENT DAYLIGHT_FLUORESCENT}</li>
1925      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_DAY_WHITE_FLUORESCENT DAY_WHITE_FLUORESCENT}</li>
1926      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_COOL_WHITE_FLUORESCENT COOL_WHITE_FLUORESCENT}</li>
1927      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_WHITE_FLUORESCENT WHITE_FLUORESCENT}</li>
1928      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_A STANDARD_A}</li>
1929      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_B STANDARD_B}</li>
1930      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_C STANDARD_C}</li>
1931      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_D55 D55}</li>
1932      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_D65 D65}</li>
1933      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_D75 D75}</li>
1934      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_D50 D50}</li>
1935      *   <li>{@link #SENSOR_REFERENCE_ILLUMINANT1_ISO_STUDIO_TUNGSTEN ISO_STUDIO_TUNGSTEN}</li>
1936      * </ul></p>
1937      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1938      *
1939      * @see CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM1
1940      * @see CameraCharacteristics#SENSOR_COLOR_TRANSFORM1
1941      * @see CameraCharacteristics#SENSOR_FORWARD_MATRIX1
1942      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2
1943      * @see #SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT
1944      * @see #SENSOR_REFERENCE_ILLUMINANT1_FLUORESCENT
1945      * @see #SENSOR_REFERENCE_ILLUMINANT1_TUNGSTEN
1946      * @see #SENSOR_REFERENCE_ILLUMINANT1_FLASH
1947      * @see #SENSOR_REFERENCE_ILLUMINANT1_FINE_WEATHER
1948      * @see #SENSOR_REFERENCE_ILLUMINANT1_CLOUDY_WEATHER
1949      * @see #SENSOR_REFERENCE_ILLUMINANT1_SHADE
1950      * @see #SENSOR_REFERENCE_ILLUMINANT1_DAYLIGHT_FLUORESCENT
1951      * @see #SENSOR_REFERENCE_ILLUMINANT1_DAY_WHITE_FLUORESCENT
1952      * @see #SENSOR_REFERENCE_ILLUMINANT1_COOL_WHITE_FLUORESCENT
1953      * @see #SENSOR_REFERENCE_ILLUMINANT1_WHITE_FLUORESCENT
1954      * @see #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_A
1955      * @see #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_B
1956      * @see #SENSOR_REFERENCE_ILLUMINANT1_STANDARD_C
1957      * @see #SENSOR_REFERENCE_ILLUMINANT1_D55
1958      * @see #SENSOR_REFERENCE_ILLUMINANT1_D65
1959      * @see #SENSOR_REFERENCE_ILLUMINANT1_D75
1960      * @see #SENSOR_REFERENCE_ILLUMINANT1_D50
1961      * @see #SENSOR_REFERENCE_ILLUMINANT1_ISO_STUDIO_TUNGSTEN
1962      */
1963     @PublicKey
1964     public static final Key<Integer> SENSOR_REFERENCE_ILLUMINANT1 =
1965             new Key<Integer>("android.sensor.referenceIlluminant1", int.class);
1966 
1967     /**
1968      * <p>The standard reference illuminant used as the scene light source when
1969      * calculating the {@link CameraCharacteristics#SENSOR_COLOR_TRANSFORM2 android.sensor.colorTransform2},
1970      * {@link CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM2 android.sensor.calibrationTransform2}, and
1971      * {@link CameraCharacteristics#SENSOR_FORWARD_MATRIX2 android.sensor.forwardMatrix2} matrices.</p>
1972      * <p>See {@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1 android.sensor.referenceIlluminant1} for more details.</p>
1973      * <p>If this key is present, then {@link CameraCharacteristics#SENSOR_COLOR_TRANSFORM2 android.sensor.colorTransform2},
1974      * {@link CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM2 android.sensor.calibrationTransform2}, and
1975      * {@link CameraCharacteristics#SENSOR_FORWARD_MATRIX2 android.sensor.forwardMatrix2} will also be present.</p>
1976      * <p><b>Range of valid values:</b><br>
1977      * Any value listed in {@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1 android.sensor.referenceIlluminant1}</p>
1978      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
1979      *
1980      * @see CameraCharacteristics#SENSOR_CALIBRATION_TRANSFORM2
1981      * @see CameraCharacteristics#SENSOR_COLOR_TRANSFORM2
1982      * @see CameraCharacteristics#SENSOR_FORWARD_MATRIX2
1983      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
1984      */
1985     @PublicKey
1986     public static final Key<Byte> SENSOR_REFERENCE_ILLUMINANT2 =
1987             new Key<Byte>("android.sensor.referenceIlluminant2", byte.class);
1988 
1989     /**
1990      * <p>A per-device calibration transform matrix that maps from the
1991      * reference sensor colorspace to the actual device sensor colorspace.</p>
1992      * <p>This matrix is used to correct for per-device variations in the
1993      * sensor colorspace, and is used for processing raw buffer data.</p>
1994      * <p>The matrix is expressed as a 3x3 matrix in row-major-order, and
1995      * contains a per-device calibration transform that maps colors
1996      * from reference sensor color space (i.e. the "golden module"
1997      * colorspace) into this camera device's native sensor color
1998      * space under the first reference illuminant
1999      * ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1 android.sensor.referenceIlluminant1}).</p>
2000      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2001      *
2002      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
2003      */
2004     @PublicKey
2005     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_CALIBRATION_TRANSFORM1 =
2006             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.calibrationTransform1", android.hardware.camera2.params.ColorSpaceTransform.class);
2007 
2008     /**
2009      * <p>A per-device calibration transform matrix that maps from the
2010      * reference sensor colorspace to the actual device sensor colorspace
2011      * (this is the colorspace of the raw buffer data).</p>
2012      * <p>This matrix is used to correct for per-device variations in the
2013      * sensor colorspace, and is used for processing raw buffer data.</p>
2014      * <p>The matrix is expressed as a 3x3 matrix in row-major-order, and
2015      * contains a per-device calibration transform that maps colors
2016      * from reference sensor color space (i.e. the "golden module"
2017      * colorspace) into this camera device's native sensor color
2018      * space under the second reference illuminant
2019      * ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2 android.sensor.referenceIlluminant2}).</p>
2020      * <p>This matrix will only be present if the second reference
2021      * illuminant is present.</p>
2022      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2023      *
2024      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2
2025      */
2026     @PublicKey
2027     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_CALIBRATION_TRANSFORM2 =
2028             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.calibrationTransform2", android.hardware.camera2.params.ColorSpaceTransform.class);
2029 
2030     /**
2031      * <p>A matrix that transforms color values from CIE XYZ color space to
2032      * reference sensor color space.</p>
2033      * <p>This matrix is used to convert from the standard CIE XYZ color
2034      * space to the reference sensor colorspace, and is used when processing
2035      * raw buffer data.</p>
2036      * <p>The matrix is expressed as a 3x3 matrix in row-major-order, and
2037      * contains a color transform matrix that maps colors from the CIE
2038      * XYZ color space to the reference sensor color space (i.e. the
2039      * "golden module" colorspace) under the first reference illuminant
2040      * ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1 android.sensor.referenceIlluminant1}).</p>
2041      * <p>The white points chosen in both the reference sensor color space
2042      * and the CIE XYZ colorspace when calculating this transform will
2043      * match the standard white point for the first reference illuminant
2044      * (i.e. no chromatic adaptation will be applied by this transform).</p>
2045      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2046      *
2047      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
2048      */
2049     @PublicKey
2050     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_COLOR_TRANSFORM1 =
2051             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.colorTransform1", android.hardware.camera2.params.ColorSpaceTransform.class);
2052 
2053     /**
2054      * <p>A matrix that transforms color values from CIE XYZ color space to
2055      * reference sensor color space.</p>
2056      * <p>This matrix is used to convert from the standard CIE XYZ color
2057      * space to the reference sensor colorspace, and is used when processing
2058      * raw buffer data.</p>
2059      * <p>The matrix is expressed as a 3x3 matrix in row-major-order, and
2060      * contains a color transform matrix that maps colors from the CIE
2061      * XYZ color space to the reference sensor color space (i.e. the
2062      * "golden module" colorspace) under the second reference illuminant
2063      * ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2 android.sensor.referenceIlluminant2}).</p>
2064      * <p>The white points chosen in both the reference sensor color space
2065      * and the CIE XYZ colorspace when calculating this transform will
2066      * match the standard white point for the second reference illuminant
2067      * (i.e. no chromatic adaptation will be applied by this transform).</p>
2068      * <p>This matrix will only be present if the second reference
2069      * illuminant is present.</p>
2070      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2071      *
2072      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2
2073      */
2074     @PublicKey
2075     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_COLOR_TRANSFORM2 =
2076             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.colorTransform2", android.hardware.camera2.params.ColorSpaceTransform.class);
2077 
2078     /**
2079      * <p>A matrix that transforms white balanced camera colors from the reference
2080      * sensor colorspace to the CIE XYZ colorspace with a D50 whitepoint.</p>
2081      * <p>This matrix is used to convert to the standard CIE XYZ colorspace, and
2082      * is used when processing raw buffer data.</p>
2083      * <p>This matrix is expressed as a 3x3 matrix in row-major-order, and contains
2084      * a color transform matrix that maps white balanced colors from the
2085      * reference sensor color space to the CIE XYZ color space with a D50 white
2086      * point.</p>
2087      * <p>Under the first reference illuminant ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1 android.sensor.referenceIlluminant1})
2088      * this matrix is chosen so that the standard white point for this reference
2089      * illuminant in the reference sensor colorspace is mapped to D50 in the
2090      * CIE XYZ colorspace.</p>
2091      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2092      *
2093      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT1
2094      */
2095     @PublicKey
2096     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_FORWARD_MATRIX1 =
2097             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.forwardMatrix1", android.hardware.camera2.params.ColorSpaceTransform.class);
2098 
2099     /**
2100      * <p>A matrix that transforms white balanced camera colors from the reference
2101      * sensor colorspace to the CIE XYZ colorspace with a D50 whitepoint.</p>
2102      * <p>This matrix is used to convert to the standard CIE XYZ colorspace, and
2103      * is used when processing raw buffer data.</p>
2104      * <p>This matrix is expressed as a 3x3 matrix in row-major-order, and contains
2105      * a color transform matrix that maps white balanced colors from the
2106      * reference sensor color space to the CIE XYZ color space with a D50 white
2107      * point.</p>
2108      * <p>Under the second reference illuminant ({@link CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2 android.sensor.referenceIlluminant2})
2109      * this matrix is chosen so that the standard white point for this reference
2110      * illuminant in the reference sensor colorspace is mapped to D50 in the
2111      * CIE XYZ colorspace.</p>
2112      * <p>This matrix will only be present if the second reference
2113      * illuminant is present.</p>
2114      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2115      *
2116      * @see CameraCharacteristics#SENSOR_REFERENCE_ILLUMINANT2
2117      */
2118     @PublicKey
2119     public static final Key<android.hardware.camera2.params.ColorSpaceTransform> SENSOR_FORWARD_MATRIX2 =
2120             new Key<android.hardware.camera2.params.ColorSpaceTransform>("android.sensor.forwardMatrix2", android.hardware.camera2.params.ColorSpaceTransform.class);
2121 
2122     /**
2123      * <p>A fixed black level offset for each of the color filter arrangement
2124      * (CFA) mosaic channels.</p>
2125      * <p>This key specifies the zero light value for each of the CFA mosaic
2126      * channels in the camera sensor.  The maximal value output by the
2127      * sensor is represented by the value in {@link CameraCharacteristics#SENSOR_INFO_WHITE_LEVEL android.sensor.info.whiteLevel}.</p>
2128      * <p>The values are given in the same order as channels listed for the CFA
2129      * layout key (see {@link CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT android.sensor.info.colorFilterArrangement}), i.e. the
2130      * nth value given corresponds to the black level offset for the nth
2131      * color channel listed in the CFA.</p>
2132      * <p><b>Range of valid values:</b><br>
2133      * &gt;= 0 for each.</p>
2134      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2135      *
2136      * @see CameraCharacteristics#SENSOR_INFO_COLOR_FILTER_ARRANGEMENT
2137      * @see CameraCharacteristics#SENSOR_INFO_WHITE_LEVEL
2138      */
2139     @PublicKey
2140     public static final Key<android.hardware.camera2.params.BlackLevelPattern> SENSOR_BLACK_LEVEL_PATTERN =
2141             new Key<android.hardware.camera2.params.BlackLevelPattern>("android.sensor.blackLevelPattern", android.hardware.camera2.params.BlackLevelPattern.class);
2142 
2143     /**
2144      * <p>Maximum sensitivity that is implemented
2145      * purely through analog gain.</p>
2146      * <p>For {@link CaptureRequest#SENSOR_SENSITIVITY android.sensor.sensitivity} values less than or
2147      * equal to this, all applied gain must be analog. For
2148      * values above this, the gain applied can be a mix of analog and
2149      * digital.</p>
2150      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2151      * <p><b>Full capability</b> -
2152      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
2153      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
2154      *
2155      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
2156      * @see CaptureRequest#SENSOR_SENSITIVITY
2157      */
2158     @PublicKey
2159     public static final Key<Integer> SENSOR_MAX_ANALOG_SENSITIVITY =
2160             new Key<Integer>("android.sensor.maxAnalogSensitivity", int.class);
2161 
2162     /**
2163      * <p>Clockwise angle through which the output image needs to be rotated to be
2164      * upright on the device screen in its native orientation.</p>
2165      * <p>Also defines the direction of rolling shutter readout, which is from top to bottom in
2166      * the sensor's coordinate system.</p>
2167      * <p><b>Units</b>: Degrees of clockwise rotation; always a multiple of
2168      * 90</p>
2169      * <p><b>Range of valid values:</b><br>
2170      * 0, 90, 180, 270</p>
2171      * <p>This key is available on all devices.</p>
2172      */
2173     @PublicKey
2174     public static final Key<Integer> SENSOR_ORIENTATION =
2175             new Key<Integer>("android.sensor.orientation", int.class);
2176 
2177     /**
2178      * <p>List of sensor test pattern modes for {@link CaptureRequest#SENSOR_TEST_PATTERN_MODE android.sensor.testPatternMode}
2179      * supported by this camera device.</p>
2180      * <p>Defaults to OFF, and always includes OFF if defined.</p>
2181      * <p><b>Range of valid values:</b><br>
2182      * Any value listed in {@link CaptureRequest#SENSOR_TEST_PATTERN_MODE android.sensor.testPatternMode}</p>
2183      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2184      *
2185      * @see CaptureRequest#SENSOR_TEST_PATTERN_MODE
2186      */
2187     @PublicKey
2188     public static final Key<int[]> SENSOR_AVAILABLE_TEST_PATTERN_MODES =
2189             new Key<int[]>("android.sensor.availableTestPatternModes", int[].class);
2190 
2191     /**
2192      * <p>List of face detection modes for {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode} that are
2193      * supported by this camera device.</p>
2194      * <p>OFF is always supported.</p>
2195      * <p><b>Range of valid values:</b><br>
2196      * Any value listed in {@link CaptureRequest#STATISTICS_FACE_DETECT_MODE android.statistics.faceDetectMode}</p>
2197      * <p>This key is available on all devices.</p>
2198      *
2199      * @see CaptureRequest#STATISTICS_FACE_DETECT_MODE
2200      */
2201     @PublicKey
2202     public static final Key<int[]> STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES =
2203             new Key<int[]>("android.statistics.info.availableFaceDetectModes", int[].class);
2204 
2205     /**
2206      * <p>The maximum number of simultaneously detectable
2207      * faces.</p>
2208      * <p><b>Range of valid values:</b><br>
2209      * 0 for cameras without available face detection; otherwise:
2210      * <code>&gt;=4</code> for LIMITED or FULL hwlevel devices or
2211      * <code>&gt;0</code> for LEGACY devices.</p>
2212      * <p>This key is available on all devices.</p>
2213      */
2214     @PublicKey
2215     public static final Key<Integer> STATISTICS_INFO_MAX_FACE_COUNT =
2216             new Key<Integer>("android.statistics.info.maxFaceCount", int.class);
2217 
2218     /**
2219      * <p>List of hot pixel map output modes for {@link CaptureRequest#STATISTICS_HOT_PIXEL_MAP_MODE android.statistics.hotPixelMapMode} that are
2220      * supported by this camera device.</p>
2221      * <p>If no hotpixel map output is available for this camera device, this will contain only
2222      * <code>false</code>.</p>
2223      * <p>ON is always supported on devices with the RAW capability.</p>
2224      * <p><b>Range of valid values:</b><br>
2225      * Any value listed in {@link CaptureRequest#STATISTICS_HOT_PIXEL_MAP_MODE android.statistics.hotPixelMapMode}</p>
2226      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2227      *
2228      * @see CaptureRequest#STATISTICS_HOT_PIXEL_MAP_MODE
2229      */
2230     @PublicKey
2231     public static final Key<boolean[]> STATISTICS_INFO_AVAILABLE_HOT_PIXEL_MAP_MODES =
2232             new Key<boolean[]>("android.statistics.info.availableHotPixelMapModes", boolean[].class);
2233 
2234     /**
2235      * <p>Maximum number of supported points in the
2236      * tonemap curve that can be used for {@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}.</p>
2237      * <p>If the actual number of points provided by the application (in {@link CaptureRequest#TONEMAP_CURVE android.tonemap.curve}*) is
2238      * less than this maximum, the camera device will resample the curve to its internal
2239      * representation, using linear interpolation.</p>
2240      * <p>The output curves in the result metadata may have a different number
2241      * of points than the input curves, and will represent the actual
2242      * hardware curves used as closely as possible when linearly interpolated.</p>
2243      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2244      * <p><b>Full capability</b> -
2245      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
2246      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
2247      *
2248      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
2249      * @see CaptureRequest#TONEMAP_CURVE
2250      */
2251     @PublicKey
2252     public static final Key<Integer> TONEMAP_MAX_CURVE_POINTS =
2253             new Key<Integer>("android.tonemap.maxCurvePoints", int.class);
2254 
2255     /**
2256      * <p>List of tonemapping modes for {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode} that are supported by this camera
2257      * device.</p>
2258      * <p>Camera devices that support the MANUAL_POST_PROCESSING capability will always list
2259      * CONTRAST_CURVE and FAST. This includes all FULL level devices.</p>
2260      * <p><b>Range of valid values:</b><br>
2261      * Any value listed in {@link CaptureRequest#TONEMAP_MODE android.tonemap.mode}</p>
2262      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2263      * <p><b>Full capability</b> -
2264      * Present on all camera devices that report being {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_FULL HARDWARE_LEVEL_FULL} devices in the
2265      * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
2266      *
2267      * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
2268      * @see CaptureRequest#TONEMAP_MODE
2269      */
2270     @PublicKey
2271     public static final Key<int[]> TONEMAP_AVAILABLE_TONE_MAP_MODES =
2272             new Key<int[]>("android.tonemap.availableToneMapModes", int[].class);
2273 
2274     /**
2275      * <p>A list of camera LEDs that are available on this system.</p>
2276      * <p><b>Possible values:</b>
2277      * <ul>
2278      *   <li>{@link #LED_AVAILABLE_LEDS_TRANSMIT TRANSMIT}</li>
2279      * </ul></p>
2280      * <p><b>Optional</b> - This value may be {@code null} on some devices.</p>
2281      * @see #LED_AVAILABLE_LEDS_TRANSMIT
2282      * @hide
2283      */
2284     public static final Key<int[]> LED_AVAILABLE_LEDS =
2285             new Key<int[]>("android.led.availableLeds", int[].class);
2286 
2287     /**
2288      * <p>Generally classifies the overall set of the camera device functionality.</p>
2289      * <p>Camera devices will come in three flavors: LEGACY, LIMITED and FULL.</p>
2290      * <p>A FULL device will support below capabilities:</p>
2291      * <ul>
2292      * <li>30fps operation at maximum resolution (== sensor resolution) is preferred, more than
2293      *   20fps is required, for at least uncompressed YUV
2294      *   output. ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains BURST_CAPTURE)</li>
2295      * <li>Per frame control ({@link CameraCharacteristics#SYNC_MAX_LATENCY android.sync.maxLatency} <code>==</code> PER_FRAME_CONTROL)</li>
2296      * <li>Manual sensor control ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains MANUAL_SENSOR)</li>
2297      * <li>Manual post-processing control ({@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities} contains
2298      *   MANUAL_POST_PROCESSING)</li>
2299      * <li>Arbitrary cropping region ({@link CameraCharacteristics#SCALER_CROPPING_TYPE android.scaler.croppingType} <code>==</code> FREEFORM)</li>
2300      * <li>At least 3 processed (but not stalling) format output streams
2301      *   ({@link CameraCharacteristics#REQUEST_MAX_NUM_OUTPUT_PROC android.request.maxNumOutputProc} <code>&gt;=</code> 3)</li>
2302      * <li>The required stream configuration defined in android.scaler.availableStreamConfigurations</li>
2303      * <li>The required exposure time range defined in {@link CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE android.sensor.info.exposureTimeRange}</li>
2304      * <li>The required maxFrameDuration defined in {@link CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION android.sensor.info.maxFrameDuration}</li>
2305      * </ul>
2306      * <p>A LIMITED device may have some or none of the above characteristics.
2307      * To find out more refer to {@link CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES android.request.availableCapabilities}.</p>
2308      * <p>Some features are not part of any particular hardware level or capability and must be
2309      * queried separately. These include:</p>
2310      * <ul>
2311      * <li>Calibrated timestamps ({@link CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE android.sensor.info.timestampSource} <code>==</code> REALTIME)</li>
2312      * <li>Precision lens control ({@link CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION android.lens.info.focusDistanceCalibration} <code>==</code> CALIBRATED)</li>
2313      * <li>Face detection ({@link CameraCharacteristics#STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES android.statistics.info.availableFaceDetectModes})</li>
2314      * <li>Optical or electrical image stabilization
2315      *   ({@link CameraCharacteristics#LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION android.lens.info.availableOpticalStabilization},
2316      *    {@link CameraCharacteristics#CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES android.control.availableVideoStabilizationModes})</li>
2317      * </ul>
2318      * <p>A LEGACY device does not support per-frame control, manual sensor control, manual
2319      * post-processing, arbitrary cropping regions, and has relaxed performance constraints.</p>
2320      * <p>Each higher level supports everything the lower level supports
2321      * in this order: FULL <code>&gt;</code> LIMITED <code>&gt;</code> LEGACY.</p>
2322      * <p><b>Possible values:</b>
2323      * <ul>
2324      *   <li>{@link #INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED LIMITED}</li>
2325      *   <li>{@link #INFO_SUPPORTED_HARDWARE_LEVEL_FULL FULL}</li>
2326      *   <li>{@link #INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY LEGACY}</li>
2327      * </ul></p>
2328      * <p>This key is available on all devices.</p>
2329      *
2330      * @see CameraCharacteristics#CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES
2331      * @see CameraCharacteristics#LENS_INFO_AVAILABLE_OPTICAL_STABILIZATION
2332      * @see CameraCharacteristics#LENS_INFO_FOCUS_DISTANCE_CALIBRATION
2333      * @see CameraCharacteristics#REQUEST_AVAILABLE_CAPABILITIES
2334      * @see CameraCharacteristics#REQUEST_MAX_NUM_OUTPUT_PROC
2335      * @see CameraCharacteristics#SCALER_CROPPING_TYPE
2336      * @see CameraCharacteristics#SENSOR_INFO_EXPOSURE_TIME_RANGE
2337      * @see CameraCharacteristics#SENSOR_INFO_MAX_FRAME_DURATION
2338      * @see CameraCharacteristics#SENSOR_INFO_TIMESTAMP_SOURCE
2339      * @see CameraCharacteristics#STATISTICS_INFO_AVAILABLE_FACE_DETECT_MODES
2340      * @see CameraCharacteristics#SYNC_MAX_LATENCY
2341      * @see #INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
2342      * @see #INFO_SUPPORTED_HARDWARE_LEVEL_FULL
2343      * @see #INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY
2344      */
2345     @PublicKey
2346     public static final Key<Integer> INFO_SUPPORTED_HARDWARE_LEVEL =
2347             new Key<Integer>("android.info.supportedHardwareLevel", int.class);
2348 
2349     /**
2350      * <p>The maximum number of frames that can occur after a request
2351      * (different than the previous) has been submitted, and before the
2352      * result's state becomes synchronized (by setting
2353      * android.sync.frameNumber to a non-negative value).</p>
2354      * <p>This defines the maximum distance (in number of metadata results),
2355      * between android.sync.frameNumber and the equivalent
2356      * frame number for that result.</p>
2357      * <p>In other words this acts as an upper boundary for how many frames
2358      * must occur before the camera device knows for a fact that the new
2359      * submitted camera settings have been applied in outgoing frames.</p>
2360      * <p>For example if the distance was 2,</p>
2361      * <pre><code>initial request = X (repeating)
2362      * request1 = X
2363      * request2 = Y
2364      * request3 = Y
2365      * request4 = Y
2366      *
2367      * where requestN has frameNumber N, and the first of the repeating
2368      * initial request's has frameNumber F (and F &lt; 1).
2369      *
2370      * initial result = X' + { android.sync.frameNumber == F }
2371      * result1 = X' + { android.sync.frameNumber == F }
2372      * result2 = X' + { android.sync.frameNumber == CONVERGING }
2373      * result3 = X' + { android.sync.frameNumber == CONVERGING }
2374      * result4 = X' + { android.sync.frameNumber == 2 }
2375      *
2376      * where resultN has frameNumber N.
2377      * </code></pre>
2378      * <p>Since <code>result4</code> has a <code>frameNumber == 4</code> and
2379      * <code>android.sync.frameNumber == 2</code>, the distance is clearly
2380      * <code>4 - 2 = 2</code>.</p>
2381      * <p><b>Units</b>: Frame counts</p>
2382      * <p><b>Possible values:</b>
2383      * <ul>
2384      *   <li>{@link #SYNC_MAX_LATENCY_PER_FRAME_CONTROL PER_FRAME_CONTROL}</li>
2385      *   <li>{@link #SYNC_MAX_LATENCY_UNKNOWN UNKNOWN}</li>
2386      * </ul></p>
2387      * <p><b>Available values for this device:</b><br>
2388      * A positive value, PER_FRAME_CONTROL, or UNKNOWN.</p>
2389      * <p>This key is available on all devices.</p>
2390      * @see #SYNC_MAX_LATENCY_PER_FRAME_CONTROL
2391      * @see #SYNC_MAX_LATENCY_UNKNOWN
2392      */
2393     @PublicKey
2394     public static final Key<Integer> SYNC_MAX_LATENCY =
2395             new Key<Integer>("android.sync.maxLatency", int.class);
2396 
2397     /*~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~
2398      * End generated code
2399      *~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~@~O@*/
2400 
2401 
2402 
2403 }
2404