BokehPreviewExtender.java
/*
* Copyright (C) 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.camera.core.CameraSelector;
import androidx.camera.core.Logger;
import androidx.camera.core.Preview;
import androidx.camera.extensions.ExtensionsManager.EffectMode;
import androidx.camera.extensions.impl.BokehPreviewExtenderImpl;
/**
* Load the OEM extension Preview implementation for bokeh effect type.
*/
public class BokehPreviewExtender extends PreviewExtender {
private static final String TAG = "BokehPreviewExtender";
/**
* Create a new instance of the bokeh extender.
*
* @param builder Builder that will be used to create the configurations for the
* {@link androidx.camera.core.Preview}.
*/
@NonNull
public static BokehPreviewExtender create(@NonNull Preview.Builder builder) {
if (ExtensionVersion.isExtensionVersionSupported()) {
try {
return new VendorBokehPreviewExtender(builder);
} catch (NoClassDefFoundError e) {
Logger.d(TAG, "No bokeh preview extender found. Falling back to default.");
}
}
return new DefaultBokehPreviewExtender();
}
/** Empty implementation of bokeh extender which does nothing. */
private static class DefaultBokehPreviewExtender extends BokehPreviewExtender {
DefaultBokehPreviewExtender() {
}
@Override
public boolean isExtensionAvailable(@NonNull CameraSelector selector) {
return false;
}
@Override
public void enableExtension(@NonNull CameraSelector selector) {
}
}
/** Bokeh extender that calls into the vendor provided implementation. */
private static class VendorBokehPreviewExtender extends BokehPreviewExtender {
private final BokehPreviewExtenderImpl mImpl;
VendorBokehPreviewExtender(Preview.Builder builder) {
mImpl = new BokehPreviewExtenderImpl();
init(builder, mImpl, EffectMode.BOKEH);
}
}
private BokehPreviewExtender() {
}
}