Camera: Add request settings Override API

The new API can be used to speed up applying certain capture request
settings. Auto-generated files from changes in metadata_definitions.xml

Bug: 239822823
Test: Successful build
Change-Id: Idaf38603582e6ce78252d55edb39d56b02b248bb
diff --git a/core/api/current.txt b/core/api/current.txt
index 18d8fc7..102deb6 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -17593,6 +17593,7 @@
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<android.hardware.camera2.params.Capability[]> CONTROL_AVAILABLE_EXTENDED_SCENE_MODE_CAPABILITIES;
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<int[]> CONTROL_AVAILABLE_MODES;
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<int[]> CONTROL_AVAILABLE_SCENE_MODES;
+    field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<int[]> CONTROL_AVAILABLE_SETTINGS_OVERRIDES;
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<int[]> CONTROL_AVAILABLE_VIDEO_STABILIZATION_MODES;
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<int[]> CONTROL_AWB_AVAILABLE_MODES;
     field @NonNull public static final android.hardware.camera2.CameraCharacteristics.Key<java.lang.Boolean> CONTROL_AWB_LOCK_AVAILABLE;
@@ -17947,6 +17948,8 @@
     field public static final int CONTROL_SCENE_MODE_STEADYPHOTO = 11; // 0xb
     field public static final int CONTROL_SCENE_MODE_SUNSET = 10; // 0xa
     field public static final int CONTROL_SCENE_MODE_THEATRE = 7; // 0x7
+    field public static final int CONTROL_SETTINGS_OVERRIDE_OFF = 0; // 0x0
+    field public static final int CONTROL_SETTINGS_OVERRIDE_ZOOM = 1; // 0x1
     field public static final int CONTROL_VIDEO_STABILIZATION_MODE_OFF = 0; // 0x0
     field public static final int CONTROL_VIDEO_STABILIZATION_MODE_ON = 1; // 0x1
     field public static final int CONTROL_VIDEO_STABILIZATION_MODE_PREVIEW_STABILIZATION = 2; // 0x2
@@ -18145,6 +18148,7 @@
     field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Integer> CONTROL_MODE;
     field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Integer> CONTROL_POST_RAW_SENSITIVITY_BOOST;
     field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Integer> CONTROL_SCENE_MODE;
+    field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Integer> CONTROL_SETTINGS_OVERRIDE;
     field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Integer> CONTROL_VIDEO_STABILIZATION_MODE;
     field @NonNull public static final android.hardware.camera2.CaptureRequest.Key<java.lang.Float> CONTROL_ZOOM_RATIO;
     field @NonNull public static final android.os.Parcelable.Creator<android.hardware.camera2.CaptureRequest> CREATOR;
@@ -18235,6 +18239,7 @@
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> CONTROL_MODE;
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> CONTROL_POST_RAW_SENSITIVITY_BOOST;
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> CONTROL_SCENE_MODE;
+    field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> CONTROL_SETTINGS_OVERRIDE;
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> CONTROL_VIDEO_STABILIZATION_MODE;
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Float> CONTROL_ZOOM_RATIO;
     field @NonNull public static final android.hardware.camera2.CaptureResult.Key<java.lang.Integer> DISTORTION_CORRECTION_MODE;
diff --git a/core/java/android/hardware/camera2/CameraCharacteristics.java b/core/java/android/hardware/camera2/CameraCharacteristics.java
index f634726..d3cb59d 100644
--- a/core/java/android/hardware/camera2/CameraCharacteristics.java
+++ b/core/java/android/hardware/camera2/CameraCharacteristics.java
@@ -1286,6 +1286,30 @@
             new Key<android.hardware.camera2.params.HighSpeedVideoConfiguration[]>("android.control.availableHighSpeedVideoConfigurationsMaximumResolution", android.hardware.camera2.params.HighSpeedVideoConfiguration[].class);
 
     /**
+     * <p>List of available settings overrides supported by the camera device that can
+     * be used to speed up certain controls.</p>
+     * <p>When not all controls within a CaptureRequest are required to take effect
+     * at the same time on the outputs, the camera device may apply certain request keys sooner
+     * to improve latency. This list contains such supported settings overrides. Each settings
+     * override corresponds to a set of CaptureRequest keys that can be sped up when applying.</p>
+     * <p>A supported settings override can be passed in via
+     * {@link android.hardware.camera2.CaptureRequest#CONTROL_SETTINGS_OVERRIDE }, and the
+     * CaptureRequest keys corresponding to the override are applied as soon as possible, not
+     * bound by per-frame synchronization. See {@link CaptureRequest#CONTROL_SETTINGS_OVERRIDE android.control.settingsOverride} for the
+     * CaptureRequest keys for each override.</p>
+     * <p>OFF is always included in this list.</p>
+     * <p><b>Range of valid values:</b><br>
+     * Any value listed in {@link CaptureRequest#CONTROL_SETTINGS_OVERRIDE android.control.settingsOverride}</p>
+     * <p><b>Optional</b> - The value for this key may be {@code null} on some devices.</p>
+     *
+     * @see CaptureRequest#CONTROL_SETTINGS_OVERRIDE
+     */
+    @PublicKey
+    @NonNull
+    public static final Key<int[]> CONTROL_AVAILABLE_SETTINGS_OVERRIDES =
+            new Key<int[]>("android.control.availableSettingsOverrides", int[].class);
+
+    /**
      * <p>List of edge enhancement modes for {@link CaptureRequest#EDGE_MODE android.edge.mode} that are supported by this camera
      * device.</p>
      * <p>Full-capability camera devices must always support OFF; camera devices that support
diff --git a/core/java/android/hardware/camera2/CameraMetadata.java b/core/java/android/hardware/camera2/CameraMetadata.java
index 1e1d443..545aa8f 100644
--- a/core/java/android/hardware/camera2/CameraMetadata.java
+++ b/core/java/android/hardware/camera2/CameraMetadata.java
@@ -3201,6 +3201,49 @@
     public static final int CONTROL_EXTENDED_SCENE_MODE_VENDOR_START = 0x40;
 
     //
+    // Enumeration values for CaptureRequest#CONTROL_SETTINGS_OVERRIDE
+    //
+
+    /**
+     * <p>No keys are applied sooner than the other keys when applying CaptureRequest
+     * settings to the camera device. This is the default value.</p>
+     * @see CaptureRequest#CONTROL_SETTINGS_OVERRIDE
+     */
+    public static final int CONTROL_SETTINGS_OVERRIDE_OFF = 0;
+
+    /**
+     * <p>Zoom related keys are applied sooner than the other keys in the CaptureRequest. The
+     * zoom related keys are:</p>
+     * <ul>
+     * <li>{@link CaptureRequest#CONTROL_ZOOM_RATIO android.control.zoomRatio}</li>
+     * <li>{@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion}</li>
+     * <li>{@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}</li>
+     * <li>{@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions}</li>
+     * <li>{@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions}</li>
+     * </ul>
+     * <p>Even though {@link CaptureRequest#CONTROL_AE_REGIONS android.control.aeRegions}, {@link CaptureRequest#CONTROL_AWB_REGIONS android.control.awbRegions},
+     * and {@link CaptureRequest#CONTROL_AF_REGIONS android.control.afRegions} are not directly zoom related, applications
+     * typically scale these regions together with {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} to have a
+     * consistent mapping within the current field of view. In this aspect, they are
+     * related to {@link CaptureRequest#SCALER_CROP_REGION android.scaler.cropRegion} and {@link CaptureRequest#CONTROL_ZOOM_RATIO android.control.zoomRatio}.</p>
+     *
+     * @see CaptureRequest#CONTROL_AE_REGIONS
+     * @see CaptureRequest#CONTROL_AF_REGIONS
+     * @see CaptureRequest#CONTROL_AWB_REGIONS
+     * @see CaptureRequest#CONTROL_ZOOM_RATIO
+     * @see CaptureRequest#SCALER_CROP_REGION
+     * @see CaptureRequest#CONTROL_SETTINGS_OVERRIDE
+     */
+    public static final int CONTROL_SETTINGS_OVERRIDE_ZOOM = 1;
+
+    /**
+     * <p>Vendor defined settingsOverride. These depend on vendor implementation.</p>
+     * @see CaptureRequest#CONTROL_SETTINGS_OVERRIDE
+     * @hide
+     */
+    public static final int CONTROL_SETTINGS_OVERRIDE_VENDOR_START = 0x4000;
+
+    //
     // Enumeration values for CaptureRequest#EDGE_MODE
     //
 
diff --git a/core/java/android/hardware/camera2/CaptureRequest.java b/core/java/android/hardware/camera2/CaptureRequest.java
index c5cf0f6..407ea07 100644
--- a/core/java/android/hardware/camera2/CaptureRequest.java
+++ b/core/java/android/hardware/camera2/CaptureRequest.java
@@ -2429,6 +2429,90 @@
             new Key<Boolean>("android.control.awbRegionsSet", boolean.class);
 
     /**
+     * <p>The desired CaptureRequest settings override with which certain keys are
+     * applied earlier so that they can take effect sooner.</p>
+     * <p>There are some CaptureRequest keys which can be applied earlier than others
+     * when controls within a CaptureRequest aren't required to take effect at the same time.
+     * One such example is zoom. Zoom can be applied at a later stage of the camera pipeline.
+     * As soon as the camera device receives the CaptureRequest, it can apply the requested
+     * zoom value onto an earlier request that's already in the pipeline, thus improves zoom
+     * latency.</p>
+     * <p>This key's value in the capture result reflects whether the controls for this capture
+     * are overridden "by" a newer request. This means that if a capture request turns on
+     * settings override, the capture result of an earlier request will contain the key value
+     * of ZOOM. On the other hand, if a capture request has settings override turned on,
+     * but all newer requests have it turned off, the key's value in the capture result will
+     * be OFF because this capture isn't overridden by a newer capture. In the two examples
+     * below, the capture results columns illustrate the settingsOverride values in different
+     * scenarios.</p>
+     * <p>Assuming the zoom settings override can speed up by 1 frame, below example illustrates
+     * the speed-up at the start of capture session:</p>
+     * <pre><code>Camera session created
+     * Request 1 (zoom=1.0x, override=ZOOM) -&gt;
+     * Request 2 (zoom=1.2x, override=ZOOM) -&gt;
+     * Request 3 (zoom=1.4x, override=ZOOM) -&gt;  Result 1 (zoom=1.2x, override=ZOOM)
+     * Request 4 (zoom=1.6x, override=ZOOM) -&gt;  Result 2 (zoom=1.4x, override=ZOOM)
+     * Request 5 (zoom=1.8x, override=ZOOM) -&gt;  Result 3 (zoom=1.6x, override=ZOOM)
+     *                                      -&gt;  Result 4 (zoom=1.8x, override=ZOOM)
+     *                                      -&gt;  Result 5 (zoom=1.8x, override=OFF)
+     * </code></pre>
+     * <p>The application can turn on settings override and use zoom as normal. The example
+     * shows that the later zoom values (1.2x, 1.4x, 1.6x, and 1.8x) overwrite the zoom
+     * values (1.0x, 1.2x, 1.4x, and 1.8x) of earlier requests (#1, #2, #3, and #4).</p>
+     * <p>The application must make sure the settings override doesn't interfere with user
+     * journeys requiring simultaneous application of all controls in CaptureRequest on the
+     * requested output targets. For example, if the application takes a still capture using
+     * CameraCaptureSession#capture, and the repeating request immediately sets a different
+     * zoom value using override, the inflight still capture could have its zoom value
+     * overwritten unexpectedly.</p>
+     * <p>So the application is strongly recommended to turn off settingsOverride when taking
+     * still/burst captures, and turn it back on when there is only repeating viewfinder
+     * request and no inflight still/burst captures.</p>
+     * <p>Below is the example demonstrating the transitions in and out of the
+     * settings override:</p>
+     * <pre><code>Request 1 (zoom=1.0x, override=OFF)
+     * Request 2 (zoom=1.2x, override=OFF)
+     * Request 3 (zoom=1.4x, override=ZOOM)  -&gt; Result 1 (zoom=1.0x, override=OFF)
+     * Request 4 (zoom=1.6x, override=ZOOM)  -&gt; Result 2 (zoom=1.4x, override=ZOOM)
+     * Request 5 (zoom=1.8x, override=OFF)   -&gt; Result 3 (zoom=1.6x, override=ZOOM)
+     *                                       -&gt; Result 4 (zoom=1.6x, override=OFF)
+     *                                       -&gt; Result 5 (zoom=1.8x, override=OFF)
+     * </code></pre>
+     * <p>This example shows that:</p>
+     * <ul>
+     * <li>The application "ramps in" settings override by setting the control to ZOOM.
+     * In the example, request #3 enables zoom settings override. Because the camera device
+     * can speed up applying zoom by 1 frame, the outputs of request #2 has 1.4x zoom, the
+     * value specified in request #3.</li>
+     * <li>The application "ramps out" of settings override by setting the control to OFF. In
+     * the example, request #5 changes the override to OFF. Because request #4's zoom
+     * takes effect in result #3, result #4's zoom remains the same until new value takes
+     * effect in result #5.</li>
+     * </ul>
+     * <p><b>Possible values:</b></p>
+     * <ul>
+     *   <li>{@link #CONTROL_SETTINGS_OVERRIDE_OFF OFF}</li>
+     *   <li>{@link #CONTROL_SETTINGS_OVERRIDE_ZOOM ZOOM}</li>
+     * </ul>
+     *
+     * <p><b>Available values for this device:</b><br>
+     * {@link CameraCharacteristics#CONTROL_AVAILABLE_SETTINGS_OVERRIDES android.control.availableSettingsOverrides}</p>
+     * <p><b>Optional</b> - The value for this key may be {@code null} on some devices.</p>
+     * <p><b>Limited capability</b> -
+     * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
+     * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
+     *
+     * @see CameraCharacteristics#CONTROL_AVAILABLE_SETTINGS_OVERRIDES
+     * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
+     * @see #CONTROL_SETTINGS_OVERRIDE_OFF
+     * @see #CONTROL_SETTINGS_OVERRIDE_ZOOM
+     */
+    @PublicKey
+    @NonNull
+    public static final Key<Integer> CONTROL_SETTINGS_OVERRIDE =
+            new Key<Integer>("android.control.settingsOverride", int.class);
+
+    /**
      * <p>Operation mode for edge
      * enhancement.</p>
      * <p>Edge enhancement improves sharpness and details in the captured image. OFF means
diff --git a/core/java/android/hardware/camera2/CaptureResult.java b/core/java/android/hardware/camera2/CaptureResult.java
index 1a15596..c4f0cab 100644
--- a/core/java/android/hardware/camera2/CaptureResult.java
+++ b/core/java/android/hardware/camera2/CaptureResult.java
@@ -2633,6 +2633,90 @@
             new Key<Float>("android.control.zoomRatio", float.class);
 
     /**
+     * <p>The desired CaptureRequest settings override with which certain keys are
+     * applied earlier so that they can take effect sooner.</p>
+     * <p>There are some CaptureRequest keys which can be applied earlier than others
+     * when controls within a CaptureRequest aren't required to take effect at the same time.
+     * One such example is zoom. Zoom can be applied at a later stage of the camera pipeline.
+     * As soon as the camera device receives the CaptureRequest, it can apply the requested
+     * zoom value onto an earlier request that's already in the pipeline, thus improves zoom
+     * latency.</p>
+     * <p>This key's value in the capture result reflects whether the controls for this capture
+     * are overridden "by" a newer request. This means that if a capture request turns on
+     * settings override, the capture result of an earlier request will contain the key value
+     * of ZOOM. On the other hand, if a capture request has settings override turned on,
+     * but all newer requests have it turned off, the key's value in the capture result will
+     * be OFF because this capture isn't overridden by a newer capture. In the two examples
+     * below, the capture results columns illustrate the settingsOverride values in different
+     * scenarios.</p>
+     * <p>Assuming the zoom settings override can speed up by 1 frame, below example illustrates
+     * the speed-up at the start of capture session:</p>
+     * <pre><code>Camera session created
+     * Request 1 (zoom=1.0x, override=ZOOM) -&gt;
+     * Request 2 (zoom=1.2x, override=ZOOM) -&gt;
+     * Request 3 (zoom=1.4x, override=ZOOM) -&gt;  Result 1 (zoom=1.2x, override=ZOOM)
+     * Request 4 (zoom=1.6x, override=ZOOM) -&gt;  Result 2 (zoom=1.4x, override=ZOOM)
+     * Request 5 (zoom=1.8x, override=ZOOM) -&gt;  Result 3 (zoom=1.6x, override=ZOOM)
+     *                                      -&gt;  Result 4 (zoom=1.8x, override=ZOOM)
+     *                                      -&gt;  Result 5 (zoom=1.8x, override=OFF)
+     * </code></pre>
+     * <p>The application can turn on settings override and use zoom as normal. The example
+     * shows that the later zoom values (1.2x, 1.4x, 1.6x, and 1.8x) overwrite the zoom
+     * values (1.0x, 1.2x, 1.4x, and 1.8x) of earlier requests (#1, #2, #3, and #4).</p>
+     * <p>The application must make sure the settings override doesn't interfere with user
+     * journeys requiring simultaneous application of all controls in CaptureRequest on the
+     * requested output targets. For example, if the application takes a still capture using
+     * CameraCaptureSession#capture, and the repeating request immediately sets a different
+     * zoom value using override, the inflight still capture could have its zoom value
+     * overwritten unexpectedly.</p>
+     * <p>So the application is strongly recommended to turn off settingsOverride when taking
+     * still/burst captures, and turn it back on when there is only repeating viewfinder
+     * request and no inflight still/burst captures.</p>
+     * <p>Below is the example demonstrating the transitions in and out of the
+     * settings override:</p>
+     * <pre><code>Request 1 (zoom=1.0x, override=OFF)
+     * Request 2 (zoom=1.2x, override=OFF)
+     * Request 3 (zoom=1.4x, override=ZOOM)  -&gt; Result 1 (zoom=1.0x, override=OFF)
+     * Request 4 (zoom=1.6x, override=ZOOM)  -&gt; Result 2 (zoom=1.4x, override=ZOOM)
+     * Request 5 (zoom=1.8x, override=OFF)   -&gt; Result 3 (zoom=1.6x, override=ZOOM)
+     *                                       -&gt; Result 4 (zoom=1.6x, override=OFF)
+     *                                       -&gt; Result 5 (zoom=1.8x, override=OFF)
+     * </code></pre>
+     * <p>This example shows that:</p>
+     * <ul>
+     * <li>The application "ramps in" settings override by setting the control to ZOOM.
+     * In the example, request #3 enables zoom settings override. Because the camera device
+     * can speed up applying zoom by 1 frame, the outputs of request #2 has 1.4x zoom, the
+     * value specified in request #3.</li>
+     * <li>The application "ramps out" of settings override by setting the control to OFF. In
+     * the example, request #5 changes the override to OFF. Because request #4's zoom
+     * takes effect in result #3, result #4's zoom remains the same until new value takes
+     * effect in result #5.</li>
+     * </ul>
+     * <p><b>Possible values:</b></p>
+     * <ul>
+     *   <li>{@link #CONTROL_SETTINGS_OVERRIDE_OFF OFF}</li>
+     *   <li>{@link #CONTROL_SETTINGS_OVERRIDE_ZOOM ZOOM}</li>
+     * </ul>
+     *
+     * <p><b>Available values for this device:</b><br>
+     * {@link CameraCharacteristics#CONTROL_AVAILABLE_SETTINGS_OVERRIDES android.control.availableSettingsOverrides}</p>
+     * <p><b>Optional</b> - The value for this key may be {@code null} on some devices.</p>
+     * <p><b>Limited capability</b> -
+     * Present on all camera devices that report being at least {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED HARDWARE_LEVEL_LIMITED} devices in the
+     * {@link CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL android.info.supportedHardwareLevel} key</p>
+     *
+     * @see CameraCharacteristics#CONTROL_AVAILABLE_SETTINGS_OVERRIDES
+     * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL
+     * @see #CONTROL_SETTINGS_OVERRIDE_OFF
+     * @see #CONTROL_SETTINGS_OVERRIDE_ZOOM
+     */
+    @PublicKey
+    @NonNull
+    public static final Key<Integer> CONTROL_SETTINGS_OVERRIDE =
+            new Key<Integer>("android.control.settingsOverride", int.class);
+
+    /**
      * <p>Operation mode for edge
      * enhancement.</p>
      * <p>Edge enhancement improves sharpness and details in the captured image. OFF means