| /* |
| * Copyright (C) 2014 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 com.android.camera.one.v2.sharedimagereader.metadatasynchronizer; |
| |
| import android.hardware.camera2.CaptureResult; |
| |
| import com.android.camera.async.Futures2; |
| import com.android.camera.async.Updatable; |
| import com.android.camera.one.v2.camera2proxy.TotalCaptureResultProxy; |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.util.concurrent.FutureCallback; |
| import com.google.common.util.concurrent.Futures; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.common.util.concurrent.MoreExecutors; |
| import com.google.common.util.concurrent.SettableFuture; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.ParametersAreNonnullByDefault; |
| import javax.annotation.concurrent.GuardedBy; |
| |
| @ParametersAreNonnullByDefault |
| public class MetadataPoolImpl implements Updatable<TotalCaptureResultProxy>, MetadataPool { |
| @GuardedBy("mLock") |
| private final Map<Long, SettableFuture<TotalCaptureResultProxy>> mMetadataFutures; |
| private final Object mLock; |
| |
| public MetadataPoolImpl() { |
| mMetadataFutures = new HashMap<>(); |
| mLock = new Object(); |
| } |
| |
| @VisibleForTesting |
| public int getMapSize() { |
| synchronized (mLock) { |
| return mMetadataFutures.size(); |
| } |
| } |
| |
| private SettableFuture<TotalCaptureResultProxy> getOrCreateFuture(long timestamp) { |
| SettableFuture<TotalCaptureResultProxy> metadataFuture; |
| synchronized (mLock) { |
| if (!mMetadataFutures.containsKey(timestamp)) { |
| mMetadataFutures.put(timestamp, SettableFuture.<TotalCaptureResultProxy> create()); |
| } |
| |
| metadataFuture = mMetadataFutures.get(timestamp); |
| } |
| return metadataFuture; |
| } |
| |
| @Nonnull |
| @Override |
| public ListenableFuture<TotalCaptureResultProxy> removeMetadataFuture(final long timestamp) { |
| ListenableFuture<TotalCaptureResultProxy> future = getOrCreateFuture(timestamp); |
| // Remove the future from the map when it is done to free the memory. |
| Futures.addCallback(future, new FutureCallback<TotalCaptureResultProxy>() { |
| @Override |
| public void onSuccess(TotalCaptureResultProxy totalCaptureResultProxy) { |
| synchronized (mLock) { |
| mMetadataFutures.remove(timestamp); |
| } |
| } |
| |
| @Override |
| public void onFailure(Throwable throwable) { |
| throw new UnsupportedOperationException(); |
| } |
| }, MoreExecutors.directExecutor()); |
| return Futures2.nonCancellationPropagating(future); |
| } |
| |
| @Override |
| public void update(@Nonnull TotalCaptureResultProxy metadata) { |
| long timestamp = metadata.get(CaptureResult.SENSOR_TIMESTAMP); |
| SettableFuture<TotalCaptureResultProxy> future = getOrCreateFuture(timestamp); |
| future.set(metadata); |
| } |
| } |