diff options
Diffstat (limited to 'tests/src/com/android/gallery3d/exif/ExifXmlReader.java')
-rw-r--r-- | tests/src/com/android/gallery3d/exif/ExifXmlReader.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/tests/src/com/android/gallery3d/exif/ExifXmlReader.java b/tests/src/com/android/gallery3d/exif/ExifXmlReader.java new file mode 100644 index 000000000..12e9cf77e --- /dev/null +++ b/tests/src/com/android/gallery3d/exif/ExifXmlReader.java @@ -0,0 +1,125 @@ +/* + * Copyright (C) 2012 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.exif; + +import org.xmlpull.v1.XmlPullParser; +import org.xmlpull.v1.XmlPullParserException; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +public class ExifXmlReader { + private static final String TAG_EXIF = "exif"; + private static final String TAG_TAG = "tag"; + + private static final String IFD0 = "IFD0"; + private static final String EXIF_IFD = "ExifIFD"; + private static final String GPS_IFD = "GPS"; + private static final String IFD1 = "IFD1"; + private static final String INTEROP_IFD = "InteropIFD"; + + private static final String ATTR_ID = "id"; + private static final String ATTR_IFD = "ifd"; + + private static final String NO_VALUE = "NO_VALUE"; + + /** + * This function read the ground truth XML. + * + * @throws XmlPullParserException + * @throws IOException + */ + static public List<Map<Short, List<String>>> readXml(XmlPullParser parser) + throws XmlPullParserException, IOException { + + List<Map<Short, List<String>>> exifData = + new ArrayList<Map<Short, List<String>>>(IfdId.TYPE_IFD_COUNT); + for (int i = 0; i < IfdId.TYPE_IFD_COUNT; i++) { + exifData.add(new HashMap<Short, List<String>>()); + } + + while (parser.next() != XmlPullParser.END_DOCUMENT) { + if (parser.getEventType() == XmlPullParser.START_TAG) { + break; + } + } + parser.require(XmlPullParser.START_TAG, null, TAG_EXIF); + + while (parser.next() != XmlPullParser.END_TAG) { + if (parser.getEventType() != XmlPullParser.START_TAG) { + continue; + } + + parser.require(XmlPullParser.START_TAG, null, TAG_TAG); + + int ifdId = getIfdIdFromString(parser.getAttributeValue(null, ATTR_IFD)); + short id = Integer.decode(parser.getAttributeValue(null, ATTR_ID)).shortValue(); + + String value = ""; + if (parser.next() == XmlPullParser.TEXT) { + value = parser.getText(); + parser.next(); + } + + if (ifdId < 0) { + // TODO: the MarkerNote segment. + } else { + List<String> tagData = exifData.get(ifdId).get(id); + if (tagData == null) { + tagData = new ArrayList<String>(); + exifData.get(ifdId).put(id, tagData); + } + if (NO_VALUE.equals(value)) { + tagData.add(null); + } else { + tagData.add(value.trim()); + } + } + + parser.require(XmlPullParser.END_TAG, null, null); + } + return exifData; + } + + static private int getIfdIdFromString(String prefix) { + if (IFD0.equals(prefix)) { + return IfdId.TYPE_IFD_0; + } else if (EXIF_IFD.equals(prefix)) { + return IfdId.TYPE_IFD_EXIF; + } else if (GPS_IFD.equals(prefix)) { + return IfdId.TYPE_IFD_GPS; + } else if (IFD1.equals(prefix)) { + return IfdId.TYPE_IFD_1; + } else if (INTEROP_IFD.equals(prefix)) { + return IfdId.TYPE_IFD_INTEROPERABILITY; + } else { + assert (false); + return -1; + } + } + + static public int getTrueTagNumber(Map<Short, List<String>> ifdData) { + int size = 0; + for (List<String> tag : ifdData.values()) { + size += tag.size(); + } + return size; + } +} |