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/*
* Copyright (C) 2011 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.gallery3d.data;
import android.content.Context;
import android.graphics.Rect;
import com.android.gallery3d.R;
import com.android.gallery3d.picasasource.PicasaSource;
import java.util.ArrayList;
import java.util.TreeMap;
public class FaceClustering extends Clustering {
@SuppressWarnings("unused")
private static final String TAG = "FaceClustering";
private FaceCluster[] mClusters;
private String mUntaggedString;
private Context mContext;
private class FaceCluster {
ArrayList<Path> mPaths = new ArrayList<Path>();
String mName;
MediaItem mCoverItem;
Rect mCoverRegion;
int mCoverFaceIndex;
public FaceCluster(String name) {
mName = name;
}
public void add(MediaItem item, int faceIndex) {
Path path = item.getPath();
mPaths.add(path);
Face[] faces = item.getFaces();
if (faces != null) {
Face face = faces[faceIndex];
if (mCoverItem == null) {
mCoverItem = item;
mCoverRegion = face.getPosition();
mCoverFaceIndex = faceIndex;
} else {
Rect region = face.getPosition();
if (mCoverRegion.width() < region.width() &&
mCoverRegion.height() < region.height()) {
mCoverItem = item;
mCoverRegion = face.getPosition();
mCoverFaceIndex = faceIndex;
}
}
}
}
public int size() {
return mPaths.size();
}
public MediaItem getCover() {
if (mCoverItem != null) {
if (PicasaSource.isPicasaImage(mCoverItem)) {
return PicasaSource.getFaceItem(mContext, mCoverItem, mCoverFaceIndex);
} else {
return mCoverItem;
}
}
return null;
}
}
public FaceClustering(Context context) {
mUntaggedString = context.getResources().getString(R.string.no_faces);
mContext = context;
}
@Override
public void run(MediaSet baseSet) {
final TreeMap<Face, FaceCluster> map =
new TreeMap<Face, FaceCluster>();
final FaceCluster untagged = new FaceCluster(mUntaggedString);
baseSet.enumerateTotalMediaItems(new MediaSet.ItemConsumer() {
@Override
public void consume(int index, MediaItem item) {
Face[] faces = item.getFaces();
if (faces == null || faces.length == 0) {
untagged.add(item, -1);
return;
}
for (int j = 0; j < faces.length; j++) {
Face face = faces[j];
FaceCluster cluster = map.get(face);
if (cluster == null) {
cluster = new FaceCluster(face.getName());
map.put(face, cluster);
}
cluster.add(item, j);
}
}
});
int m = map.size();
mClusters = map.values().toArray(new FaceCluster[m + ((untagged.size() > 0) ? 1 : 0)]);
if (untagged.size() > 0) {
mClusters[m] = untagged;
}
}
@Override
public int getNumberOfClusters() {
return mClusters.length;
}
@Override
public ArrayList<Path> getCluster(int index) {
return mClusters[index].mPaths;
}
@Override
public String getClusterName(int index) {
return mClusters[index].mName;
}
@Override
public MediaItem getClusterCover(int index) {
return mClusters[index].getCover();
}
}
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