private static IConvertible GetConvertibleObject([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
var convertible = o as IConvertible;
if (convertible != null)
{
return(convertible);
}
var array = o as Array;
if (array != null && array.Length == 1 && array.Rank == 1)
{
return(array.GetValue(0) as IConvertible);
}
return(null);
}
public static bool TryGetRational([NotNull] this Directory directory, int tagType, out Rational value)
{
var o = directory.GetObject(tagType);
if (o == null)
{
value = default(Rational);
return(false);
}
if (o is Rational r)
{
value = r;
return(true);
}
if (o is int i)
{
value = new Rational(i, 1);
return(true);
}
if (o is long l)
{
value = new Rational(l, 1);
return(true);
}
// NOTE not doing conversions for real number types
value = default(Rational);
return(false);
}
public static bool TryGetRational(this Directory directory, int tagType, out Rational value)
{
var o = directory.GetObject(tagType);
if (o == null)
{
value = default(Rational);
return(false);
}
if (o is Rational)
{
value = (Rational)o;
return(true);
}
if (o is int?)
{
value = new Rational((int)o, 1);
return(true);
}
if (o is long?)
{
value = new Rational((long)o, 1);
return(true);
}
// NOTE not doing conversions for real number types
value = default(Rational);
return(false);
}
public static StringValue GetStringValue(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o is StringValue value)
{
return(value);
}
return(default);
public static StringValue GetStringValue([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o is StringValue)
{
return((StringValue)o);
}
return(default(StringValue));
}
private static T ThrowValueNotPossible <T>([NotNull] Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
throw new MetadataException($"No value exists for tag {directory.GetTagName(tagType)}.");
}
throw new MetadataException($"Tag {tagType} cannot be converted to {typeof(T).Name}. It is of type {o.GetType()} with value: {o}");
}
private void AddQuickTimeMetaCreationDate(MetadataExtractor.Directory quickTimeMeta, Photo photo)
{
var tag = quickTimeMeta.Tags.SingleOrDefault(t => t.Name == QuickTimeMetaDataCreationDateTag);
if (tag != null)
{
var tagValue = (StringValue)quickTimeMeta.GetObject(tag.Type);
if (DateTime.TryParse(tagValue.ToString(), out DateTime creationDate))
{
photo.TakenDate = creationDate;
}
}
}
private static void AddQuickTimeMetaCreationDate(MetadataExtractor.Directory quickTimeMeta, Photo photo)
{
var tag = quickTimeMeta.Tags.SingleOrDefault(t => t.Name == "mdta.com.apple.quicktime.creationdate");
if (tag != null)
{
var tagValue = quickTimeMeta.GetObject(tag.Type) as QuickTimeMetadataValue;
if (DateTime.TryParse(tagValue.Value, out DateTime creationDate))
{
photo.TakenDate = creationDate;
}
}
}
public static bool TryGetDateTime([NotNull] this Directory directory, int tagType /*, [CanBeNull] TimeZoneInfo timeZone = null*/, out DateTime dateTime)
{
var o = directory.GetObject(tagType);
if (o == null)
{
dateTime = default(DateTime);
return(false);
}
if (o is DateTime)
{
dateTime = (DateTime)o;
return(true);
}
var s = o as string;
if (o is StringValue)
{
s = ((StringValue)o).ToString();
}
if (s != null)
{
if (DateTime.TryParseExact(s, _datePatterns, null, DateTimeStyles.AllowWhiteSpaces, out dateTime))
{
return(true);
}
dateTime = default(DateTime);
return(false);
}
var convertible = o as IConvertible;
if (convertible != null)
{
try
{
dateTime = convertible.ToDateTime(null);
return(true);
}
catch (FormatException)
{ }
}
dateTime = default(DateTime);
return(false);
}
public static bool TryGetDateTime(this Directory directory, int tagType /*, TimeZoneInfo? timeZone = null*/, out DateTime dateTime)
{
var o = directory.GetObject(tagType);
if (o == null)
{
dateTime = default;
return(false);
}
if (o is DateTime dt)
{
dateTime = dt;
return(true);
}
var s = o as string;
if (o is StringValue sv)
{
s = sv.ToString();
}
if (s != null)
{
if (DateTime.TryParseExact(s, _datePatterns, null, DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AdjustToUniversal, out dateTime))
{
return(true);
}
dateTime = default;
return(false);
}
if (o is IConvertible convertible)
{
try
{
dateTime = convertible.ToDateTime(null);
return(true);
}
catch (FormatException)
{ }
}
dateTime = default;
return(false);
}
/// <summary>Attempts to return the specified tag's value as a DateTime.</summary>
/// <remarks>If the underlying value is a <see cref="string"/>, then attempts will be made to parse it.</remarks>
/// <returns><c>true</c> if a DateTime was returned, otherwise <c>false</c>.</returns>
public static bool TryGetDateTime(this Directory directory, int tagType /*, [CanBeNull] TimeZoneInfo timeZone = null*/, out DateTime dateTime)
{
var o = directory.GetObject(tagType);
if (o == null)
{
dateTime = default(DateTime);
return(false);
}
if (o is DateTime)
{
dateTime = (DateTime)o;
return(true);
}
var s = o as string;
if (s == null)
{
dateTime = default(DateTime);
return(false);
}
// This seems to cover all known Exif date strings
// Note that " : : : : " is a valid date string according to the Exif spec (which means 'unknown date'): http://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif/datetimeoriginal.html
var datePatterns = new[] { "yyyy:MM:dd HH:mm:ss", "yyyy:MM:dd HH:mm", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm" };
foreach (var datePattern in datePatterns)
{
if (DateTime.TryParseExact(s, datePattern, null, DateTimeStyles.AllowWhiteSpaces, out dateTime))
{
return(true);
}
}
if (o is IConvertible)
{
dateTime = ((IConvertible)o).ToDateTime(null);
return(true);
}
dateTime = default(DateTime);
return(false);
}
public static StringValue[] GetStringValueArray([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is StringValue[] stringValues)
{
return(stringValues);
}
if (o is StringValue sv)
{
return new [] { sv }
}
;
return(null);
}
public static string GetString([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is Rational r)
{
return(r.ToSimpleString());
}
if (o is DateTime dt)
{
return(dt.ToString(
dt.Kind != DateTimeKind.Unspecified
? "ddd MMM dd HH:mm:ss zzz yyyy"
: "ddd MMM dd HH:mm:ss yyyy"));
}
if (o is bool b)
{
return(b ? "true" : "false");
}
// handle arrays of objects and primitives
if (o is Array array)
{
var componentType = array.GetType().GetElementType();
var str = new StringBuilder();
if (componentType == typeof(float))
{
var vals = (float[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(double))
{
var vals = (double[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(int))
{
var vals = (int[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(uint))
{
var vals = (uint[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(short))
{
var vals = (short[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(ushort))
{
var vals = (ushort[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(byte))
{
var vals = (byte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(sbyte))
{
var vals = (sbyte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(Rational))
{
var vals = (Rational[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(string))
{
var vals = (string[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType.IsByRef)
{
var vals = (object[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else
{
for (var i = 0; i < array.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(array.GetValue(i));
}
}
return(str.ToString());
}
if (o is IEnumerable <string> strings)
{
#if NET35
var sb = new StringBuilder();
foreach (var s in strings)
{
if (sb.Length != 0)
{
sb.Append(' ');
}
sb.Append(s);
}
return(sb.ToString());
#else
return(string.Join(" ", strings));
#endif
}
if (o is double d)
{
return(d.ToString("0.###"));
}
if (o is float f)
{
return(f.ToString("0.###"));
}
// Note that several cameras leave trailing spaces (Olympus, Nikon) but this library is intended to show
// the actual data within the file. It is not inconceivable that whitespace may be significant here, so we
// do not trim. Also, if support is added for writing data back to files, this may cause issues.
// We leave trimming to the presentation layer.
return(o.ToString());
}
public static Rational[] GetRationalArray([NotNull] this Directory directory, int tagType)
{
return(directory.GetObject(tagType) as Rational[]);
}
public static string?GetString(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is Rational r)
{
return(r.ToSimpleString());
}
if (o is DateTime dt)
{
return(dt.ToString(
dt.Kind != DateTimeKind.Unspecified
? "ddd MMM dd HH:mm:ss zzz yyyy"
: "ddd MMM dd HH:mm:ss yyyy"));
}
if (o is bool b)
{
return(b ? "true" : "false");
}
// handle arrays of objects and primitives
if (o is Array array)
{
var componentType = array.GetType().GetElementType();
var str = new StringBuilder();
if (componentType == typeof(float))
{
var vals = (float[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(double))
{
var vals = (double[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(int))
{
var vals = (int[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(uint))
{
var vals = (uint[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(short))
{
var vals = (short[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(ushort))
{
var vals = (ushort[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(byte))
{
var vals = (byte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(sbyte))
{
var vals = (sbyte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(Rational))
{
var vals = (Rational[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(string))
{
var vals = (string[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType is { IsByRef : true })
public static byte[] GetByteArray([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is StringValue value)
{
return(value.Bytes);
}
byte[] bytes;
if (o is Rational[] rationals)
{
bytes = new byte[rationals.Length];
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] = rationals[i].ToByte();
}
return(bytes);
}
bytes = o as byte[];
if (bytes != null)
{
return(bytes);
}
if (o is int[] ints)
{
bytes = new byte[ints.Length];
for (var i = 0; i < ints.Length; i++)
{
bytes[i] = unchecked ((byte)ints[i]);
}
return(bytes);
}
if (o is short[] shorts)
{
bytes = new byte[shorts.Length];
for (var i = 0; i < shorts.Length; i++)
{
bytes[i] = unchecked ((byte)shorts[i]);
}
return(bytes);
}
if (o is string str)
{
bytes = new byte[str.Length];
for (var i = 0; i < str.Length; i++)
{
bytes[i] = unchecked ((byte)str[i]);
}
return(bytes);
}
var nullableInt = o as int?;
if (nullableInt != null)
{
return new[] { (byte)nullableInt.Value }
}
;
return(null);
}
public static int[] GetInt32Array([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is int[] ints)
{
return(ints);
}
if (o is Rational[] rationals)
{
ints = new int[rationals.Length];
for (var i = 0; i < ints.Length; i++)
{
ints[i] = rationals[i].ToInt32();
}
return(ints);
}
if (o is short[] shorts)
{
ints = new int[shorts.Length];
for (var i = 0; i < shorts.Length; i++)
{
ints[i] = shorts[i];
}
return(ints);
}
if (o is sbyte[] sbytes)
{
ints = new int[sbytes.Length];
for (var i = 0; i < sbytes.Length; i++)
{
ints[i] = sbytes[i];
}
return(ints);
}
if (o is byte[] bytes)
{
ints = new int[bytes.Length];
for (var i = 0; i < bytes.Length; i++)
{
ints[i] = bytes[i];
}
return(ints);
}
if (o is string str)
{
ints = new int[str.Length];
for (var i = 0; i < str.Length; i++)
{
ints[i] = str[i];
}
return(ints);
}
var nullableInt = o as int?;
if (nullableInt != null)
{
return new[] { (int)o }
}
;
return(null);
}
public static string[] GetStringArray([NotNull] this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is string[] strings)
{
return(strings);
}
if (o is string s)
{
return new[] { s }
}
;
if (o is StringValue)
{
return new[] { o.ToString() }
}
;
if (o is StringValue[] stringValues)
{
var strs = new string[stringValues.Length];
for (var i = 0; i < strs.Length; i++)
{
strs[i] = stringValues[i].ToString();
}
return(strs);
}
if (o is int[] ints)
{
strings = new string[ints.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = ints[i].ToString();
}
return(strings);
}
if (o is byte[] bytes)
{
strings = new string[bytes.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = ((int)bytes[i]).ToString();
}
return(strings);
}
if (o is Rational[] rationals)
{
strings = new string[rationals.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = rationals[i].ToSimpleString(false);
}
return(strings);
}
return(null);
}
public static string[] GetStringArray(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
var strings = o as string[];
if (strings != null)
{
return(strings);
}
var s = o as string;
if (s != null)
{
return new[] { s }
}
;
var ints = o as int[];
if (ints != null)
{
strings = new string[ints.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = ints[i].ToString();
}
return(strings);
}
var bytes = o as byte[];
if (bytes != null)
{
strings = new string[bytes.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = ((int)bytes[i]).ToString();
}
return(strings);
}
var rationals = o as Rational[];
if (rationals != null)
{
strings = new string[rationals.Length];
for (var i = 0; i < strings.Length; i++)
{
strings[i] = rationals[i].ToSimpleString(false);
}
return(strings);
}
return(null);
}
public static int[] GetInt32Array(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
var ints = o as int[];
if (ints != null)
{
return(ints);
}
var rationals = o as Rational[];
if (rationals != null)
{
ints = new int[rationals.Length];
for (var i = 0; i < ints.Length; i++)
{
ints[i] = rationals[i].ToInt32();
}
return(ints);
}
var shorts = o as short[];
if (shorts != null)
{
ints = new int[shorts.Length];
for (var i = 0; i < shorts.Length; i++)
{
ints[i] = shorts[i];
}
return(ints);
}
if (o.GetType() == typeof(sbyte[]))
{
var bytes = (sbyte[])o;
ints = new int[bytes.Length];
for (var i = 0; i < bytes.Length; i++)
{
ints[i] = bytes[i];
}
return(ints);
}
if (o.GetType() == typeof(byte[]))
{
var bytes = (byte[])o;
ints = new int[bytes.Length];
for (var i = 0; i < bytes.Length; i++)
{
ints[i] = bytes[i];
}
return(ints);
}
var str = o as string;
if (str != null)
{
ints = new int[str.Length];
for (var i = 0; i < str.Length; i++)
{
ints[i] = str[i];
}
return(ints);
}
var nullableInt = o as int?;
if (nullableInt != null)
{
return new[] { (int)o }
}
;
return(null);
}
public static byte[] GetByteArray(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
byte[] bytes;
var rationals = o as Rational[];
if (rationals != null)
{
bytes = new byte[rationals.Length];
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] = rationals[i].ToByte();
}
return(bytes);
}
bytes = o as byte[];
if (bytes != null)
{
return(bytes);
}
var ints = o as int[];
if (ints != null)
{
bytes = new byte[ints.Length];
for (var i = 0; i < ints.Length; i++)
{
bytes[i] = unchecked ((byte)ints[i]);
}
return(bytes);
}
var shorts = o as short[];
if (shorts != null)
{
bytes = new byte[shorts.Length];
for (var i = 0; i < shorts.Length; i++)
{
bytes[i] = unchecked ((byte)shorts[i]);
}
return(bytes);
}
var str = o as string;
if (str != null)
{
bytes = new byte[str.Length];
for (var i = 0; i < str.Length; i++)
{
bytes[i] = unchecked ((byte)str[i]);
}
return(bytes);
}
var nullableInt = o as int?;
if (nullableInt != null)
{
return new[] { (byte)nullableInt.Value }
}
;
return(null);
}
public static string GetString(this Directory directory, int tagType)
{
var o = directory.GetObject(tagType);
if (o == null)
{
return(null);
}
if (o is Rational)
{
return(((Rational)o).ToSimpleString());
}
if (o is DateTime)
{
var dateTime = (DateTime)o;
return(dateTime.ToString(
dateTime.Kind == DateTimeKind.Utc
? "ddd MMM dd HH:mm:ss yyyy"
: "ddd MMM dd HH:mm:ss zzz yyyy"));
}
if (o is bool)
{
return((bool)o ? "true" : "false");
}
// handle arrays of objects and primitives
var array = o as Array;
if (array != null)
{
var componentType = array.GetType().GetElementType();
var str = new StringBuilder();
if (componentType == typeof(float))
{
var vals = (float[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(double))
{
var vals = (double[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.AppendFormat("{0:0.###}", vals[i]);
}
}
else if (componentType == typeof(int))
{
var vals = (int[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(uint))
{
var vals = (uint[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(short))
{
var vals = (short[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(ushort))
{
var vals = (ushort[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(byte))
{
var vals = (byte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(sbyte))
{
var vals = (sbyte[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(Rational))
{
var vals = (Rational[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType == typeof(string))
{
var vals = (string[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else if (componentType.IsByRef)
{
var vals = (object[])array;
for (var i = 0; i < vals.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(vals[i]);
}
}
else
{
for (var i = 0; i < array.Length; i++)
{
if (i != 0)
{
str.Append(' ');
}
str.Append(array.GetValue(i));
}
}
return(str.ToString());
}
if (o is double)
{
return(((double)o).ToString("0.###"));
}
if (o is float)
{
return(((float)o).ToString("0.###"));
}
// Note that several cameras leave trailing spaces (Olympus, Nikon) but this library is intended to show
// the actual data within the file. It is not inconceivable that whitespace may be significant here, so we
// do not trim. Also, if support is added for writing data back to files, this may cause issues.
// We leave trimming to the presentation layer.
return(o.ToString());
}