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/*
* Copyright (C) 2010 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 com.android.gallery3d.app.GalleryApp;
import android.hardware.usb.UsbDevice;
import android.mtp.MtpConstants;
import android.mtp.MtpObjectInfo;
import android.mtp.MtpStorageInfo;
import android.net.Uri;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
public class MtpDevice extends MediaSet {
private static final String TAG = "MtpDevice";
private final GalleryApp mApplication;
private final int mDeviceId;
private final String mDeviceName;
private final DataManager mDataManager;
private final MtpContext mMtpContext;
private final String mName;
private final ChangeNotifier mNotifier;
private final Path mItemPath;
private List<MtpObjectInfo> mJpegChildren;
public MtpDevice(Path path, GalleryApp application, int deviceId,
String name, MtpContext mtpContext) {
super(path, nextVersionNumber());
mApplication = application;
mDeviceId = deviceId;
mDeviceName = UsbDevice.getDeviceName(deviceId);
mDataManager = application.getDataManager();
mMtpContext = mtpContext;
mName = name;
mNotifier = new ChangeNotifier(this, Uri.parse("mtp://"), application);
mItemPath = Path.fromString("/mtp/item/" + String.valueOf(deviceId));
mJpegChildren = new ArrayList<MtpObjectInfo>();
}
public MtpDevice(Path path, GalleryApp application, int deviceId,
MtpContext mtpContext) {
this(path, application, deviceId,
MtpDeviceSet.getDeviceName(mtpContext, deviceId), mtpContext);
}
private List<MtpObjectInfo> loadItems() {
ArrayList<MtpObjectInfo> result = new ArrayList<MtpObjectInfo>();
List<MtpStorageInfo> storageList = mMtpContext.getMtpClient()
.getStorageList(mDeviceName);
if (storageList == null) return result;
for (MtpStorageInfo info : storageList) {
collectJpegChildren(info.getStorageId(), 0, result);
}
return result;
}
private void collectJpegChildren(int storageId, int objectId,
ArrayList<MtpObjectInfo> result) {
ArrayList<MtpObjectInfo> dirChildren = new ArrayList<MtpObjectInfo>();
queryChildren(storageId, objectId, result, dirChildren);
for (int i = 0, n = dirChildren.size(); i < n; i++) {
MtpObjectInfo info = dirChildren.get(i);
collectJpegChildren(storageId, info.getObjectHandle(), result);
}
}
private void queryChildren(int storageId, int objectId,
ArrayList<MtpObjectInfo> jpeg, ArrayList<MtpObjectInfo> dir) {
List<MtpObjectInfo> children = mMtpContext.getMtpClient().getObjectList(
mDeviceName, storageId, objectId);
if (children == null) return;
for (MtpObjectInfo obj : children) {
int format = obj.getFormat();
switch (format) {
case MtpConstants.FORMAT_JFIF:
case MtpConstants.FORMAT_EXIF_JPEG:
jpeg.add(obj);
break;
case MtpConstants.FORMAT_ASSOCIATION:
dir.add(obj);
break;
default:
Log.w(TAG, "other type: name = " + obj.getName()
+ ", format = " + format);
}
}
}
public static MtpObjectInfo getObjectInfo(MtpContext mtpContext, int deviceId,
int objectId) {
String deviceName = UsbDevice.getDeviceName(deviceId);
return mtpContext.getMtpClient().getObjectInfo(deviceName, objectId);
}
@Override
public ArrayList<MediaItem> getMediaItem(int start, int count) {
ArrayList<MediaItem> result = new ArrayList<MediaItem>();
int begin = start;
int end = Math.min(start + count, mJpegChildren.size());
DataManager dataManager = mApplication.getDataManager();
for (int i = begin; i < end; i++) {
MtpObjectInfo child = mJpegChildren.get(i);
Path childPath = mItemPath.getChild(child.getObjectHandle());
MtpImage image = (MtpImage) dataManager.peekMediaObject(childPath);
if (image == null) {
image = new MtpImage(
childPath, mApplication, mDeviceId, child, mMtpContext);
} else {
image.updateContent(child);
}
result.add(image);
}
return result;
}
@Override
public int getMediaItemCount() {
return mJpegChildren.size();
}
@Override
public String getName() {
return mName;
}
@Override
public long reload() {
if (mNotifier.isDirty()) {
mDataVersion = nextVersionNumber();
mJpegChildren = loadItems();
}
return mDataVersion;
}
@Override
public int getSupportedOperations() {
return SUPPORT_IMPORT;
}
@Override
public boolean Import() {
return mMtpContext.copyAlbum(mDeviceName, mName, mJpegChildren);
}
@Override
public boolean isLeafAlbum() {
return true;
}
}
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