AvailableKeysRetriever.java
/*
* Copyright 2023 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 androidx.camera.extensions.internal.compat.workaround;
import android.content.Context;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CaptureRequest;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.extensions.impl.ImageCaptureExtenderImpl;
import androidx.camera.extensions.internal.compat.quirk.DeviceQuirks;
import androidx.camera.extensions.internal.compat.quirk.GetAvailableKeysNeedsOnInit;
import java.util.List;
/**
* A workaround for getting the available CaptureRequest keys safely.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public class AvailableKeysRetriever {
boolean mShouldInvokeOnInit;
/**
* Default constructor.
*/
public AvailableKeysRetriever() {
mShouldInvokeOnInit = DeviceQuirks.get(GetAvailableKeysNeedsOnInit.class) != null;
}
/**
* Get available CaptureRequest keys from the given {@link ImageCaptureExtenderImpl}. The
* cameraId, cameraCharacteristics and the context is needed for invoking onInit whenever
* necessary.
*/
@NonNull
public List<CaptureRequest.Key> getAvailableCaptureRequestKeys(
@NonNull ImageCaptureExtenderImpl imageCaptureExtender,
@NonNull String cameraId,
@NonNull CameraCharacteristics cameraCharacteristics,
@NonNull Context context) {
if (mShouldInvokeOnInit) {
imageCaptureExtender.onInit(cameraId, cameraCharacteristics, context);
}
try {
return imageCaptureExtender.getAvailableCaptureRequestKeys();
} finally {
if (mShouldInvokeOnInit) {
imageCaptureExtender.onDeInit();
}
}
}
}