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Support additional Exif tags #447

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Merged
merged 1 commit into from
May 23, 2025
Merged

Support additional Exif tags #447

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60 changes: 60 additions & 0 deletions MetadataExtractor/Formats/Exif/ExifDescriptorBase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,12 @@ public abstract class ExifDescriptorBase<T>(T directory)
TagInteropVersion => GetInteropVersionDescription(),
TagOrientation => GetOrientationDescription(),
TagResolutionUnit => GetResolutionDescription(),
TagTemperature => GetTemperatureDescription(),
TagHumidity => GetHumidityDescription(),
TagPressure => GetPressureDescription(),
TagWaterDepth => GetWaterDepthDescription(),
TagAcceleration => GetAccelerationDescription(),
TagCameraElevationAngle => GetCameraElevationAngleDescription(),
TagYCbCrPositioning => GetYCbCrPositioningDescription(),
TagXResolution => GetXResolutionDescription(),
TagYResolution => GetYResolutionDescription(),
Expand Down Expand Up @@ -164,6 +170,60 @@ public abstract class ExifDescriptorBase<T>(T directory)
"cm");
}

public string? GetTemperatureDescription()
{
if (!Directory.TryGetRational(TagTemperature, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.0} �C";
}

public string? GetHumidityDescription()
{
if (!Directory.TryGetRational(TagHumidity, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.0} %";
}

public string? GetPressureDescription()
{
if (!Directory.TryGetRational(TagPressure, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.0} hPa";
}

public string? GetWaterDepthDescription()
{
if (!Directory.TryGetRational(TagWaterDepth, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.0##} metres";
}

public string? GetAccelerationDescription()
{
if (!Directory.TryGetRational(TagAcceleration, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.0##} mGal";
}

public string? GetCameraElevationAngleDescription()
{
if (!Directory.TryGetRational(TagCameraElevationAngle, out Rational value))
return null;
if (value.Denominator == 0xFFFFFFFFL)
return "Unknown";
return $"{value.ToDouble():0.##} degrees";
}

/// <summary>The Windows specific tags uses plain Unicode.</summary>
private string? GetUnicodeDescription(int tag)
{
Expand Down
13 changes: 13 additions & 0 deletions MetadataExtractor/Formats/Exif/ExifDirectoryBase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -437,6 +437,13 @@ public abstract class ExifDirectoryBase : Directory

public const int TagSubsecondTimeDigitized = 0x9292;

public const int TagTemperature = 0x9400;
public const int TagHumidity = 0x9401;
public const int TagPressure = 0x9402;
public const int TagWaterDepth = 0x9403;
public const int TagAcceleration = 0x9404;
public const int TagCameraElevationAngle = 0x9405;

/// <summary>The image title, as used by Windows XP.</summary>
public const int TagWinTitle = 0x9C9B;

Expand Down Expand Up @@ -862,6 +869,12 @@ protected static void AddExifTagNames(Dictionary<int, string> map)
map[TagSubsecondTime] = "Sub-Sec Time";
map[TagSubsecondTimeOriginal] = "Sub-Sec Time Original";
map[TagSubsecondTimeDigitized] = "Sub-Sec Time Digitized";
map[TagTemperature] = "Temperature";
map[TagHumidity] = "Humidity";
map[TagPressure] = "Pressure";
map[TagWaterDepth] = "Water Depth";
map[TagAcceleration] = "Acceleration";
map[TagCameraElevationAngle] = "Camera Elevation Angle";
map[TagWinTitle] = "Windows XP Title";
map[TagWinComment] = "Windows XP Comment";
map[TagWinAuthor] = "Windows XP Author";
Expand Down
12 changes: 12 additions & 0 deletions MetadataExtractor/PublicAPI/net8.0/PublicAPI.Unshipped.txt
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Original file line number Diff line number Diff line change
@@ -1,6 +1,12 @@
#nullable enable
abstract MetadataExtractor.IO.IndexedReader.GetBytes(int index, System.Span<byte> bytes) -> void
abstract MetadataExtractor.IO.SequentialReader.GetBytes(System.Span<byte> bytes) -> void
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagAcceleration = 37892 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagCameraElevationAngle = 37893 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagHumidity = 37889 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagPressure = 37890 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagTemperature = 37888 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagWaterDepth = 37891 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEAverage = 6 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEMatrix = 2 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEStable = 4 -> int
Expand Down Expand Up @@ -75,6 +81,12 @@ MetadataExtractor.Formats.Apple.BplistReader.BplistReader() -> void
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.Get(byte key) -> object!
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.GetTopObject() -> System.Collections.Generic.Dictionary<byte, byte>?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetAccelerationDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetCameraElevationAngleDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetHumidityDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetPressureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetTemperatureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetWaterDepthDescription() -> string?
MetadataExtractor.Formats.Exif.GpsDirectory.TryGetGeoLocation(out MetadataExtractor.GeoLocation geoLocation) -> bool
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAEStableDescription() -> string?
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAFStableDescription() -> string?
Expand Down
12 changes: 12 additions & 0 deletions MetadataExtractor/PublicAPI/netstandard2.0/PublicAPI.Unshipped.txt
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Original file line number Diff line number Diff line change
@@ -1,6 +1,12 @@
#nullable enable
abstract MetadataExtractor.IO.IndexedReader.GetBytes(int index, System.Span<byte> bytes) -> void
abstract MetadataExtractor.IO.SequentialReader.GetBytes(System.Span<byte> bytes) -> void
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagAcceleration = 37892 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagCameraElevationAngle = 37893 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagHumidity = 37889 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagPressure = 37890 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagTemperature = 37888 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagWaterDepth = 37891 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEAverage = 6 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEMatrix = 2 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEStable = 4 -> int
Expand Down Expand Up @@ -76,6 +82,12 @@ MetadataExtractor.Formats.Apple.BplistReader.BplistReader() -> void
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.Get(byte key) -> object!
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.GetTopObject() -> System.Collections.Generic.Dictionary<byte, byte>?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetAccelerationDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetCameraElevationAngleDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetHumidityDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetPressureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetTemperatureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetWaterDepthDescription() -> string?
MetadataExtractor.Formats.Exif.GpsDirectory.TryGetGeoLocation(out MetadataExtractor.GeoLocation geoLocation) -> bool
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAEStableDescription() -> string?
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAFStableDescription() -> string?
Expand Down
12 changes: 12 additions & 0 deletions MetadataExtractor/PublicAPI/netstandard2.1/PublicAPI.Unshipped.txt
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Original file line number Diff line number Diff line change
@@ -1,6 +1,12 @@
#nullable enable
abstract MetadataExtractor.IO.IndexedReader.GetBytes(int index, System.Span<byte> bytes) -> void
abstract MetadataExtractor.IO.SequentialReader.GetBytes(System.Span<byte> bytes) -> void
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagAcceleration = 37892 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagCameraElevationAngle = 37893 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagHumidity = 37889 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagPressure = 37890 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagTemperature = 37888 -> int
const MetadataExtractor.Formats.Exif.ExifDirectoryBase.TagWaterDepth = 37891 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEAverage = 6 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEMatrix = 2 -> int
const MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDirectory.TagAEStable = 4 -> int
Expand Down Expand Up @@ -75,6 +81,12 @@ MetadataExtractor.Formats.Apple.BplistReader.BplistReader() -> void
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.Get(byte key) -> object!
MetadataExtractor.Formats.Apple.BplistReader.PropertyListResults.GetTopObject() -> System.Collections.Generic.Dictionary<byte, byte>?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetAccelerationDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetCameraElevationAngleDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetHumidityDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetPressureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetTemperatureDescription() -> string?
MetadataExtractor.Formats.Exif.ExifDescriptorBase<T>.GetWaterDepthDescription() -> string?
MetadataExtractor.Formats.Exif.GpsDirectory.TryGetGeoLocation(out MetadataExtractor.GeoLocation geoLocation) -> bool
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAEStableDescription() -> string?
MetadataExtractor.Formats.Exif.Makernotes.AppleMakernoteDescriptor.GetAFStableDescription() -> string?
Expand Down