| /* |
| * 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.core; |
| |
| import android.graphics.Rect; |
| import android.media.Image; |
| |
| import androidx.annotation.GuardedBy; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * An {@link ImageProxy} which forwards all calls to another {@link ImageProxy}. |
| * |
| * <p>This class enables subclasses to override a few methods to achieve a custom behavior, while |
| * still delegating calls on the remaining methods to a wrapped {@link ImageProxy} instance. |
| * |
| * <p>Listeners for the image close call can be added. When the image is closed, the listeners will |
| * be notified. |
| */ |
| abstract class ForwardingImageProxy implements ImageProxy { |
| @GuardedBy("this") |
| protected final ImageProxy mImage; |
| |
| @GuardedBy("this") |
| private final Set<OnImageCloseListener> mOnImageCloseListeners = new HashSet<>(); |
| |
| /** |
| * Creates a new instance which wraps the given image. |
| * |
| * @param image to wrap |
| * @return new {@link AndroidImageProxy} instance |
| */ |
| protected ForwardingImageProxy(ImageProxy image) { |
| mImage = image; |
| } |
| |
| @Override |
| public synchronized void close() { |
| mImage.close(); |
| notifyOnImageCloseListeners(); |
| } |
| |
| @Override |
| public synchronized Rect getCropRect() { |
| return mImage.getCropRect(); |
| } |
| |
| @Override |
| public synchronized void setCropRect(Rect rect) { |
| mImage.setCropRect(rect); |
| } |
| |
| @Override |
| public synchronized int getFormat() { |
| return mImage.getFormat(); |
| } |
| |
| @Override |
| public synchronized int getHeight() { |
| return mImage.getHeight(); |
| } |
| |
| @Override |
| public synchronized int getWidth() { |
| return mImage.getWidth(); |
| } |
| |
| @Override |
| public synchronized long getTimestamp() { |
| return mImage.getTimestamp(); |
| } |
| |
| @Override |
| public synchronized void setTimestamp(long timestamp) { |
| mImage.setTimestamp(timestamp); |
| } |
| |
| @Override |
| public synchronized ImageProxy.PlaneProxy[] getPlanes() { |
| return mImage.getPlanes(); |
| } |
| |
| @Override |
| public synchronized ImageInfo getImageInfo() { |
| return mImage.getImageInfo(); |
| } |
| |
| @Override |
| public synchronized Image getImage() { |
| return mImage.getImage(); |
| } |
| |
| /** |
| * Adds a listener for close calls on this image. |
| * |
| * @param listener to add |
| */ |
| synchronized void addOnImageCloseListener(OnImageCloseListener listener) { |
| mOnImageCloseListeners.add(listener); |
| } |
| |
| /** Notifies the listeners that this image has been closed. */ |
| protected synchronized void notifyOnImageCloseListeners() { |
| for (OnImageCloseListener listener : mOnImageCloseListeners) { |
| listener.onImageClose(this); |
| } |
| } |
| |
| /** Listener for the image close event. */ |
| interface OnImageCloseListener { |
| /** |
| * Callback for image close. |
| * |
| * @param image which is closed |
| */ |
| void onImageClose(ImageProxy image); |
| } |
| } |