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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware.camera2;
import android.annotation.NonNull;
import android.annotation.IntDef;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* A report of failed capture for a single image capture from the image sensor.
*
* <p>CaptureFailures are produced by a {@link CameraDevice} if processing a
* {@link CaptureRequest} fails, either partially or fully. Use {@link #getReason}
* to determine the specific nature of the failed capture.</p>
*
* <p>Receiving a CaptureFailure means that the metadata associated with that frame number
* has been dropped -- no {@link CaptureResult} with the same frame number will be
* produced.</p>
*/
public class CaptureFailure {
/**
* The {@link CaptureResult} has been dropped this frame only due to an error
* in the framework.
*
* @see #getReason()
*/
public static final int REASON_ERROR = 0;
/**
* The capture has failed due to a {@link CameraCaptureSession#abortCaptures} call from the
* application.
*
* @see #getReason()
*/
public static final int REASON_FLUSHED = 1;
/** @hide */
@Retention(RetentionPolicy.SOURCE)
@IntDef(prefix = {"REASON_"}, value =
{REASON_ERROR,
REASON_FLUSHED })
public @interface FailureReason {};
private final CaptureRequest mRequest;
private final int mReason;
private final boolean mDropped;
private final int mSequenceId;
private final long mFrameNumber;
/**
* @hide
*/
public CaptureFailure(CaptureRequest request, int reason,
boolean dropped, int sequenceId, long frameNumber) {
mRequest = request;
mReason = reason;
mDropped = dropped;
mSequenceId = sequenceId;
mFrameNumber = frameNumber;
}
/**
* Get the request associated with this failed capture.
*
* <p>Whenever a request is unsuccessfully captured, with
* {@link CameraCaptureSession.CaptureCallback#onCaptureFailed},
* the {@code failed capture}'s {@code getRequest()} will return that {@code request}.
* </p>
*
* <p>In particular,
* <code><pre>cameraDevice.capture(someRequest, new CaptureCallback() {
* {@literal @}Override
* void onCaptureFailed(CaptureRequest myRequest, CaptureFailure myFailure) {
* assert(myFailure.getRequest.equals(myRequest) == true);
* }
* };
* </code></pre>
* </p>
*
* @return The request associated with this failed capture. Never {@code null}.
*/
@NonNull
public CaptureRequest getRequest() {
return mRequest;
}
/**
* Get the frame number associated with this failed capture.
*
* <p>Whenever a request has been processed, regardless of failed capture or success,
* it gets a unique frame number assigned to its future result/failed capture.</p>
*
* <p>This value monotonically increments, starting with 0,
* for every new result or failure; and the scope is the lifetime of the
* {@link CameraDevice}.</p>
*
* @return long frame number
*/
public long getFrameNumber() {
return mFrameNumber;
}
/**
* Determine why the request was dropped, whether due to an error or to a user
* action.
*
* @return int The reason code.
*
* @see #REASON_ERROR
* @see #REASON_FLUSHED
*/
@FailureReason
public int getReason() {
return mReason;
}
/**
* Determine if the image was captured from the camera.
*
* <p>If the image was not captured, no image buffers will be available.
* If the image was captured, then image buffers may be available.</p>
*
* @return boolean True if the image was captured, false otherwise.
*/
public boolean wasImageCaptured() {
return !mDropped;
}
/**
* The sequence ID for this failed capture that was returned by the
* {@link CameraCaptureSession#capture} family of functions.
*
* <p>The sequence ID is a unique monotonically increasing value starting from 0,
* incremented every time a new group of requests is submitted to the CameraDevice.</p>
*
* @return int The ID for the sequence of requests that this capture failure is the result of
*
* @see CameraDevice.CaptureCallback#onCaptureSequenceCompleted
*/
public int getSequenceId() {
return mSequenceId;
}
}
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