ExtensionCameraIdFilter.java
/*
* Copyright 2019 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;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.camera.core.impl.CameraIdFilter;
import androidx.camera.extensions.impl.ImageCaptureExtenderImpl;
import androidx.camera.extensions.impl.PreviewExtenderImpl;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* Filter camera id by extender implementation. If the implementation is null, all the camera ids
* will be considered available.
*/
public final class ExtensionCameraIdFilter implements CameraIdFilter {
private PreviewExtenderImpl mPreviewExtenderImpl;
private ImageCaptureExtenderImpl mImageCaptureExtenderImpl;
ExtensionCameraIdFilter(@Nullable PreviewExtenderImpl previewExtenderImpl) {
mPreviewExtenderImpl = previewExtenderImpl;
mImageCaptureExtenderImpl = null;
}
ExtensionCameraIdFilter(@Nullable ImageCaptureExtenderImpl imageCaptureExtenderImpl) {
mPreviewExtenderImpl = null;
mImageCaptureExtenderImpl = imageCaptureExtenderImpl;
}
ExtensionCameraIdFilter(@Nullable PreviewExtenderImpl previewExtenderImpl,
@Nullable ImageCaptureExtenderImpl imageCaptureExtenderImpl) {
mPreviewExtenderImpl = previewExtenderImpl;
mImageCaptureExtenderImpl = imageCaptureExtenderImpl;
}
@Override
@NonNull
public Set<String> filter(@NonNull Set<String> cameraIdSet) {
Set<String> resultCameraIdSet = new LinkedHashSet<>();
for (String cameraId : cameraIdSet) {
boolean available = true;
// If preview extender impl isn't null, check if the camera id is supported.
if (mPreviewExtenderImpl != null) {
available = mPreviewExtenderImpl.isExtensionAvailable(cameraId,
CameraUtil.getCameraCharacteristics(cameraId));
}
// If image capture extender impl isn't null, check if the camera id is supported.
if (mImageCaptureExtenderImpl != null) {
available = mImageCaptureExtenderImpl.isExtensionAvailable(cameraId,
CameraUtil.getCameraCharacteristics(cameraId));
}
// If the camera id is supported, add it to the result set.
if (available) {
resultCameraIdSet.add(cameraId);
}
}
return resultCameraIdSet;
}
}