1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.documentsui.inspector; 17 18 import static com.android.internal.util.Preconditions.checkNotNull; 19 20 import android.media.ExifInterface; 21 import android.os.Bundle; 22 import android.provider.DocumentsContract; 23 24 import com.android.documentsui.base.Shared; 25 26 import javax.annotation.Nullable; 27 28 final class MetadataUtils { 29 MetadataUtils()30 private MetadataUtils() {} 31 hasGeoCoordinates(@ullable Bundle metadata)32 static boolean hasGeoCoordinates(@Nullable Bundle metadata) { 33 if (metadata == null) { 34 return false; 35 } 36 return hasVideoCoordinates(metadata.getBundle(Shared.METADATA_KEY_VIDEO)) 37 || hasExifGpsFields(metadata.getBundle(DocumentsContract.METADATA_EXIF)); 38 } 39 hasVideoCoordinates(@ullable Bundle data)40 static boolean hasVideoCoordinates(@Nullable Bundle data) { 41 return data != null && (data.containsKey(Shared.METADATA_VIDEO_LATITUDE) 42 && data.containsKey(Shared.METADATA_VIDEO_LONGITUTE)); 43 } 44 hasExifGpsFields(@ullable Bundle exif)45 static boolean hasExifGpsFields(@Nullable Bundle exif) { 46 return exif != null && (exif.containsKey(ExifInterface.TAG_GPS_LATITUDE) 47 && exif.containsKey(ExifInterface.TAG_GPS_LONGITUDE) 48 && exif.containsKey(ExifInterface.TAG_GPS_LATITUDE_REF) 49 && exif.containsKey(ExifInterface.TAG_GPS_LONGITUDE_REF)); 50 } 51 getGeoCoordinates(Bundle metadata)52 static float[] getGeoCoordinates(Bundle metadata) { 53 assert hasGeoCoordinates(metadata); 54 checkNotNull(metadata); 55 56 Bundle bundle = metadata.getBundle(DocumentsContract.METADATA_EXIF); 57 if (hasExifGpsFields(bundle)) { 58 return getExifGpsCoords(bundle); 59 } 60 61 bundle = metadata.getBundle(Shared.METADATA_KEY_VIDEO); 62 if (hasVideoCoordinates(bundle)) { 63 return getVideoCoords(bundle); 64 } 65 66 // This should never happen, because callers should always check w/ hasGeoCoordinates first. 67 throw new IllegalArgumentException("Invalid metadata bundle: " + metadata); 68 } 69 getExifGpsCoords(Bundle exif)70 static float[] getExifGpsCoords(Bundle exif) { 71 assert hasExifGpsFields(exif); 72 73 String lat = exif.getString(ExifInterface.TAG_GPS_LATITUDE); 74 String lon = exif.getString(ExifInterface.TAG_GPS_LONGITUDE); 75 String latRef = exif.getString(ExifInterface.TAG_GPS_LATITUDE_REF); 76 String lonRef = exif.getString(ExifInterface.TAG_GPS_LONGITUDE_REF); 77 78 return new float[] { 79 ExifInterface.convertRationalLatLonToFloat(lat, latRef), 80 ExifInterface.convertRationalLatLonToFloat(lon, lonRef) 81 }; 82 } 83 getVideoCoords(Bundle data)84 static float[] getVideoCoords(Bundle data) { 85 assert hasVideoCoordinates(data); 86 return new float[] { 87 data.getFloat(Shared.METADATA_VIDEO_LATITUDE), 88 data.getFloat(Shared.METADATA_VIDEO_LONGITUTE) 89 }; 90 } 91 } 92