public virtual void TestGetThumbnailData()
{
ExifThumbnailDirectory directory = ExifReaderTest.ProcessBytes <ExifThumbnailDirectory>("Tests/Data/withExif.jpg.app1");
sbyte[] thumbData = directory.GetThumbnailData();
NUnit.Framework.Assert.IsNotNull(thumbData);
try
{
// attempt to read the thumbnail -- it should be a legal Jpeg file
JpegSegmentReader.ReadSegments(new SequentialByteArrayReader(thumbData), null);
}
catch (JpegProcessingException)
{
NUnit.Framework.Assert.Fail("Unable to construct JpegSegmentReader from thumbnail data");
}
}
public static IList <Directory> Read(Stream stream)
{
if (stream.Position != 0)
{
stream.Position = 0;
}
var segmentTypes = _exifReader.SegmentTypes;
var segments = JpegSegmentReader.ReadSegments(new SequentialStreamReader(stream), segmentTypes);
var directories = new List <Directory>();
var readerSegmentTypes = _exifReader.SegmentTypes;
var readerSegments = segments.Where(s => readerSegmentTypes.Contains(s.Type));
directories.AddRange(_exifReader.ReadJpegSegments(readerSegments));
return(directories);
}
public static void Main(string[] args)
{
if (args.Length < 1)
{
PrintUsage();
Environment.Exit(1);
}
var filePath = args[0];
if (!File.Exists(filePath))
{
Console.Error.WriteLine("File does not exist");
PrintUsage();
Environment.Exit(1);
}
ICollection <JpegSegmentType> segmentTypes = new HashSet <JpegSegmentType>();
for (var i = 1; i < args.Length; i++)
{
var segmentType = (JpegSegmentType)Enum.Parse(typeof(JpegSegmentType), args[i], ignoreCase: true);
if (!segmentType.CanContainMetadata())
{
Console.Error.WriteLine("WARNING: Segment type {0} cannot contain metadata so it may not be necessary to extract it", segmentType);
}
segmentTypes.Add(segmentType);
}
if (segmentTypes.Count == 0)
{
// If none specified, use all that could reasonably contain metadata
foreach (var segmentType in JpegSegmentTypeExtensions.CanContainMetadataTypes)
{
segmentTypes.Add(segmentType);
}
}
Console.Out.WriteLine("Reading: {0}", filePath);
using (var stream = File.OpenRead(filePath))
{
var segmentData = JpegSegmentReader.ReadSegments(new SequentialStreamReader(stream), segmentTypes);
SaveSegmentFiles(filePath, segmentData);
}
}
public void TestReadAllSegments()
{
var segmentData = JpegSegmentReader.ReadSegments("Tests/Data/withExifAndIptc.jpg", null);
Assert.Equal(1, segmentData.GetSegmentCount(JpegSegmentType.App0));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.app0"), segmentData.GetSegment(JpegSegmentType.App0));
Assert.Null(segmentData.GetSegment(JpegSegmentType.App0, 1));
Assert.Equal(2, segmentData.GetSegmentCount(JpegSegmentType.App1));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.app1.0"), segmentData.GetSegment(JpegSegmentType.App1));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.app1.1"), segmentData.GetSegment(JpegSegmentType.App1, occurrence: 1));
Assert.Null(segmentData.GetSegment(JpegSegmentType.App1, 2));
Assert.Equal(1, segmentData.GetSegmentCount(JpegSegmentType.App2));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.app2"), segmentData.GetSegment(JpegSegmentType.App2));
Assert.Null(segmentData.GetSegment(JpegSegmentType.App2, 1));
Assert.Equal(1, segmentData.GetSegmentCount(JpegSegmentType.AppD));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.appd"), segmentData.GetSegment(JpegSegmentType.AppD));
Assert.Null(segmentData.GetSegment(JpegSegmentType.AppD, 1));
Assert.Equal(1, segmentData.GetSegmentCount(JpegSegmentType.AppE));
Assert.Equal(File.ReadAllBytes("Tests/Data/withExifAndIptc.jpg.appe"), segmentData.GetSegment(JpegSegmentType.AppE));
Assert.Null(segmentData.GetSegment(JpegSegmentType.AppE, 1));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App3));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App4));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App5));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App6));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App7));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App8));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.App9));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.AppA));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.AppB));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.AppC));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.AppF));
Assert.Equal(0, segmentData.GetSegmentCount(JpegSegmentType.Com));
Assert.Equal(4, segmentData.GetSegmentCount(JpegSegmentType.Dht));
Assert.Equal(2, segmentData.GetSegmentCount(JpegSegmentType.Dqt));
Assert.Equal(1, segmentData.GetSegmentCount(JpegSegmentType.Sof0));
Assert.Null(segmentData.GetSegment(JpegSegmentType.App3));
}
/// <exception cref="System.IO.IOException"/>
/// <exception cref="Com.Drew.Imaging.Jpeg.JpegProcessingException"/>
public static void Main(string[] args)
{
if (args.Length < 1)
{
PrintUsage();
System.Environment.Exit(1);
}
string filePath = args[0];
if (!new FilePath(filePath).Exists())
{
System.Console.Error.Println("File does not exist");
PrintUsage();
System.Environment.Exit(1);
}
ICollection <JpegSegmentType> segmentTypes = new HashSet <JpegSegmentType>();
for (int i = 1; i < args.Length; i++)
{
JpegSegmentType segmentType = JpegSegmentType.ValueOf(args[i].ToUpper());
if (!segmentType.canContainMetadata)
{
System.Console.Error.Printf("WARNING: Segment type %s cannot contain metadata so it may not be necessary to extract it%n", segmentType);
}
segmentTypes.Add(segmentType);
}
if (segmentTypes.Count == 0)
{
// If none specified, use all that could reasonably contain metadata
Sharpen.Collections.AddAll(segmentTypes, JpegSegmentType.canContainMetadataTypes);
}
System.Console.Out.Println("Reading: " + filePath);
JpegSegmentData segmentData = JpegSegmentReader.ReadSegments(new FilePath(filePath), segmentTypes.AsIterable());
SaveSegmentFiles(filePath, segmentData);
}
private static IReadOnlyList <JpegSegment> ReadSegments(string fileName, ICollection <JpegSegmentType>?segmentTypes = null)
{
using var stream = TestDataUtil.OpenRead(fileName);
return(JpegSegmentReader.ReadSegments(new SequentialStreamReader(stream), segmentTypes).ToList());
}
private static IReadOnlyList <JpegSegment> ReadSegments(string fileName, ICollection <JpegSegmentType> segmentTypes = null)
{
using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
return(JpegSegmentReader.ReadSegments(new SequentialStreamReader(stream), segmentTypes).ToList());
}
public override FileMetadata AnalyzeFile()
{
try
{
this.foundMetadata = new FileMetadata();
IReadOnlyList <MetadataExtractor.Directory> directories = MetadataExtractor.ImageMetadataReader.ReadMetadata(this.fileStream);
foreach (MetadataExtractor.Directory currentDir in directories.Where(p => !IgnoredExifDirectories.Contains(p.Name)))
{
if (currentDir is MetadataExtractor.Formats.Exif.ExifThumbnailDirectory)
{
try
{
uint offset = (uint)currentDir.GetObject(MetadataExtractor.Formats.Exif.ExifThumbnailDirectory.TagThumbnailOffset) + (uint)MetadataExtractor.Formats.Exif.ExifReader.JpegSegmentPreamble.Length;
uint length = (uint)currentDir.GetObject(MetadataExtractor.Formats.Exif.ExifThumbnailDirectory.TagThumbnailLength);
long currentPosition = this.fileStream.Position;
this.fileStream.Seek(0, SeekOrigin.Begin);
JpegSegment app1Segment = JpegSegmentReader.ReadSegments(new MetadataExtractor.IO.SequentialStreamReader(this.fileStream), new[] { JpegSegmentType.App1 }).FirstOrDefault();
if (app1Segment != null)
{
byte[] thumb = new byte[length];
Array.Copy(app1Segment.Bytes, offset, thumb, 0, length);
this.foundMetadata.Thumbnail = thumb;
}
this.fileStream.Seek(currentPosition, SeekOrigin.Begin);
}
catch (Exception)
{
}
}
else if (currentDir is MetadataExtractor.Formats.Exif.GpsDirectory gps)
{
if (this.foundMetadata.GPS == null)
{
MetadataExtractor.GeoLocation gpsLocation = gps.GetGeoLocation();
if (gpsLocation != null)
{
this.foundMetadata.GPS = new GeoLocation(gpsLocation.ToDmsString(), gpsLocation.Longitude, gpsLocation.Latitude);
if (gps.ContainsTag(MetadataExtractor.Formats.Exif.GpsDirectory.TagAltitude))
{
this.foundMetadata.GPS.Altitude = $"{gps.GetDescription(MetadataExtractor.Formats.Exif.GpsDirectory.TagAltitude)} ({gps.GetDescription(MetadataExtractor.Formats.Exif.GpsDirectory.TagAltitudeRef)})";;
}
}
}
}
else
{
Dictionary <string, string> dicTags = new Dictionary <string, string>();
foreach (MetadataExtractor.Tag tag in currentDir.Tags)
{
string lcDescription = tag.Description?.Trim();
string lcName = tag.Name?.Trim();
if (!String.IsNullOrWhiteSpace(lcName) && !String.IsNullOrWhiteSpace(lcDescription) &&
!lcName.StartsWith("unknown", StringComparison.OrdinalIgnoreCase) && !lcDescription.ToLower().StartsWith("unknown", StringComparison.OrdinalIgnoreCase))
{
lcName = Functions.RemoveAccentsWithNormalization(lcName);
lcDescription = Functions.RemoveAccentsWithNormalization(lcDescription);
switch (tag.Type)
{
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagWinAuthor:
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagArtist:
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagCameraOwnerName:
this.foundMetadata.Add(new User(lcDescription, false, "EXIF"));
break;
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagSoftware:
string strSoftware = Analysis.ApplicationAnalysis.GetApplicationsFromString(lcDescription);
if (!String.IsNullOrEmpty(strSoftware))
{
this.foundMetadata.Add(new Application(strSoftware));
}
break;
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagDateTime:
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagDateTimeDigitized:
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagDateTimeOriginal:
if (DateTime.TryParseExact(lcDescription, "yyyy:MM:dd HH:mm:ss", CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime date) &&
date > DateTime.MinValue && (!foundMetadata.Dates.CreationDate.HasValue || this.foundMetadata.Dates.CreationDate > date))
{
this.foundMetadata.Dates.CreationDate = date;
}
break;
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagModel:
this.foundMetadata.Model = lcDescription;
break;
case MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagHostComputer:
this.foundMetadata.OperatingSystem = lcDescription;
break;
default:
break;
}
if (!dicTags.ContainsKey(lcName))
{
dicTags.Add(lcName, lcDescription);
}
}
}
if (dicTags.Count > 0)
{
string makerKey = currentDir.Name;
int i = 1;
while (foundMetadata.Makernotes.ContainsKey(makerKey))
{
makerKey = $"{currentDir.Name} ({i})";
i++;
}
foundMetadata.Makernotes.Add(makerKey, dicTags);
}
}
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine($"Error analizing EXIF metadata ({e.ToString()})");
}
return(this.foundMetadata);
}
public void TestWithNonJpegFile()
{
Assert.Throws <JpegProcessingException>(() => JpegSegmentReader.ReadSegments("MetadataExtractor.Tests.dll", null));
}
public void TestLoadJpegWithoutExifDataReturnsNull()
{
var segmentData = JpegSegmentReader.ReadSegments("Tests/Data/noExif.jpg", null);
Assert.Null(segmentData.GetSegment(JpegSegmentType.App1));
}
