diff options
Diffstat (limited to 'core/java/android/hardware/camera2/CaptureRequest.java')
| -rw-r--r-- | core/java/android/hardware/camera2/CaptureRequest.java | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/core/java/android/hardware/camera2/CaptureRequest.java b/core/java/android/hardware/camera2/CaptureRequest.java index 0849df8..b417496 100644 --- a/core/java/android/hardware/camera2/CaptureRequest.java +++ b/core/java/android/hardware/camera2/CaptureRequest.java @@ -867,9 +867,9 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>> * metering sequence when it processes this request.</p> * <p>This entry is normally set to IDLE, or is not * included at all in the request settings. When included and - * set to START, the camera device will trigger the autoexposure + * set to START, the camera device will trigger the auto-exposure (AE) * precapture metering sequence.</p> - * <p>The precapture sequence should triggered before starting a + * <p>The precapture sequence should be triggered before starting a * high-quality still capture for final metering decisions to * be made, and for firing pre-capture flash pulses to estimate * scene brightness and required final capture flash power, when @@ -877,6 +877,14 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>> * <p>Normally, this entry should be set to START for only a * single request, and the application should wait until the * sequence completes before starting a new one.</p> + * <p>When a precapture metering sequence is finished, the camera device + * may lock the auto-exposure routine internally to be able to accurately expose the + * subsequent still capture image (<code>{@link CaptureRequest#CONTROL_CAPTURE_INTENT android.control.captureIntent} == STILL_CAPTURE</code>). + * For this case, the AE may not resume normal scan if no subsequent still capture is + * submitted. To ensure that the AE routine restarts normal scan, the application should + * submit a request with <code>{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} == true</code>, followed by a request + * with <code>{@link CaptureRequest#CONTROL_AE_LOCK android.control.aeLock} == false</code>, if the application decides not to submit a + * still capture request after the precapture sequence completes.</p> * <p>The exact effect of auto-exposure (AE) precapture trigger * depends on the current AE mode and state; see * {@link CaptureResult#CONTROL_AE_STATE android.control.aeState} for AE precapture state transition @@ -895,7 +903,9 @@ public final class CaptureRequest extends CameraMetadata<CaptureRequest.Key<?>> * 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 CaptureRequest#CONTROL_AE_LOCK * @see CaptureResult#CONTROL_AE_STATE + * @see CaptureRequest#CONTROL_CAPTURE_INTENT * @see CameraCharacteristics#INFO_SUPPORTED_HARDWARE_LEVEL * @see #CONTROL_AE_PRECAPTURE_TRIGGER_IDLE * @see #CONTROL_AE_PRECAPTURE_TRIGGER_START |