/// <exception cref="System.IO.IOException"/>
public override bool CustomProcessTag(int tagOffset, ICollection <int> processedIfdOffsets, int tiffHeaderOffset, IndexedReader reader, int tagId, int byteCount)
{
// Custom processing for the Makernote tag
if (tagId == ExifDirectoryBase.TagMakernote && CurrentDirectory is ExifSubIfdDirectory)
{
return(ProcessMakernote(tagOffset, processedIfdOffsets, tiffHeaderOffset, reader));
}
// Custom processing for embedded IPTC data
if (tagId == ExifDirectoryBase.TagIptcNaa && CurrentDirectory is ExifIfd0Directory)
{
// NOTE Adobe sets type 4 for IPTC instead of 7
if (reader.GetSByte(tagOffset) == 0x1c)
{
var iptcBytes = reader.GetBytes(tagOffset, byteCount);
Directories.Add(new IptcReader().Extract(new SequentialByteArrayReader(iptcBytes), iptcBytes.Length));
return(true);
}
return(false);
}
return(false);
}
private static void ProcessKodakMakernote([NotNull] KodakMakernoteDirectory directory, int tagValueOffset, [NotNull] IndexedReader reader)
{
// Kodak's makernote is not in IFD format. It has values at fixed offsets.
var dataOffset = tagValueOffset + 8;
try
{
directory.Set(KodakMakernoteDirectory.TagKodakModel, reader.GetString(dataOffset, 8));
directory.Set(KodakMakernoteDirectory.TagQuality, reader.GetByte(dataOffset + 9));
directory.Set(KodakMakernoteDirectory.TagBurstMode, reader.GetByte(dataOffset + 10));
directory.Set(KodakMakernoteDirectory.TagImageWidth, reader.GetUInt16(dataOffset + 12));
directory.Set(KodakMakernoteDirectory.TagImageHeight, reader.GetUInt16(dataOffset + 14));
directory.Set(KodakMakernoteDirectory.TagYearCreated, reader.GetUInt16(dataOffset + 16));
directory.Set(KodakMakernoteDirectory.TagMonthDayCreated, reader.GetBytes(dataOffset + 18, 2));
directory.Set(KodakMakernoteDirectory.TagTimeCreated, reader.GetBytes(dataOffset + 20, 4));
directory.Set(KodakMakernoteDirectory.TagBurstMode2, reader.GetUInt16(dataOffset + 24));
directory.Set(KodakMakernoteDirectory.TagShutterMode, reader.GetByte(dataOffset + 27));
directory.Set(KodakMakernoteDirectory.TagMeteringMode, reader.GetByte(dataOffset + 28));
directory.Set(KodakMakernoteDirectory.TagSequenceNumber, reader.GetByte(dataOffset + 29));
directory.Set(KodakMakernoteDirectory.TagFNumber, reader.GetUInt16(dataOffset + 30));
directory.Set(KodakMakernoteDirectory.TagExposureTime, reader.GetUInt32(dataOffset + 32));
directory.Set(KodakMakernoteDirectory.TagExposureCompensation, reader.GetInt16(dataOffset + 36));
directory.Set(KodakMakernoteDirectory.TagFocusMode, reader.GetByte(dataOffset + 56));
directory.Set(KodakMakernoteDirectory.TagWhiteBalance, reader.GetByte(dataOffset + 64));
directory.Set(KodakMakernoteDirectory.TagFlashMode, reader.GetByte(dataOffset + 92));
directory.Set(KodakMakernoteDirectory.TagFlashFired, reader.GetByte(dataOffset + 93));
directory.Set(KodakMakernoteDirectory.TagIsoSetting, reader.GetUInt16(dataOffset + 94));
directory.Set(KodakMakernoteDirectory.TagIso, reader.GetUInt16(dataOffset + 96));
directory.Set(KodakMakernoteDirectory.TagTotalZoom, reader.GetUInt16(dataOffset + 98));
directory.Set(KodakMakernoteDirectory.TagDateTimeStamp, reader.GetUInt16(dataOffset + 100));
directory.Set(KodakMakernoteDirectory.TagColorMode, reader.GetUInt16(dataOffset + 102));
directory.Set(KodakMakernoteDirectory.TagDigitalZoom, reader.GetUInt16(dataOffset + 104));
directory.Set(KodakMakernoteDirectory.TagSharpness, reader.GetSByte(dataOffset + 107));
}
catch (IOException ex)
{
directory.AddError("Error processing Kodak makernote data: " + ex.Message);
}
}
/// <exception cref="System.IO.IOException"/>
private static void ProcessTag(ITiffHandler handler, int tagId, int tagValueOffset, int componentCount, TiffDataFormatCode formatCode, IndexedReader reader)
{
switch (formatCode)
{
case TiffDataFormatCode.Undefined:
{
// this includes exif user comments
handler.SetByteArray(tagId, reader.GetBytes(tagValueOffset, componentCount));
break;
}
case TiffDataFormatCode.String:
{
handler.SetString(tagId, reader.GetNullTerminatedStringValue(tagValueOffset, componentCount));
break;
}
case TiffDataFormatCode.RationalS:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetInt32(tagValueOffset), reader.GetInt32(tagValueOffset + 4)));
}
else if (componentCount > 1)
{
var array = new Rational[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = new Rational(reader.GetInt32(tagValueOffset + 8 * i), reader.GetInt32(tagValueOffset + 4 + 8 * i));
}
handler.SetRationalArray(tagId, array);
}
break;
}
case TiffDataFormatCode.RationalU:
{
if (componentCount == 1)
{
handler.SetRational(tagId, new Rational(reader.GetUInt32(tagValueOffset), reader.GetUInt32(tagValueOffset + 4)));
}
else if (componentCount > 1)
{
var array = new Rational[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = new Rational(reader.GetUInt32(tagValueOffset + 8 * i), reader.GetUInt32(tagValueOffset + 4 + 8 * i));
}
handler.SetRationalArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Single:
{
if (componentCount == 1)
{
handler.SetFloat(tagId, reader.GetFloat32(tagValueOffset));
}
else
{
var array = new float[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetFloat32(tagValueOffset + i * 4);
}
handler.SetFloatArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Double:
{
if (componentCount == 1)
{
handler.SetDouble(tagId, reader.GetDouble64(tagValueOffset));
}
else
{
var array = new double[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetDouble64(tagValueOffset + i * 4);
}
handler.SetDoubleArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int8S:
{
if (componentCount == 1)
{
handler.SetInt8S(tagId, reader.GetSByte(tagValueOffset));
}
else
{
var array = new sbyte[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetSByte(tagValueOffset + i);
}
handler.SetInt8SArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int8U:
{
if (componentCount == 1)
{
handler.SetInt8U(tagId, reader.GetByte(tagValueOffset));
}
else
{
var array = new byte[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetByte(tagValueOffset + i);
}
handler.SetInt8UArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int16S:
{
if (componentCount == 1)
{
handler.SetInt16S(tagId, reader.GetInt16(tagValueOffset));
}
else
{
var array = new short[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt16(tagValueOffset + i * 2);
}
handler.SetInt16SArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int16U:
{
if (componentCount == 1)
{
handler.SetInt16U(tagId, reader.GetUInt16(tagValueOffset));
}
else
{
var array = new ushort[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt16(tagValueOffset + i * 2);
}
handler.SetInt16UArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int32S:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32S(tagId, reader.GetInt32(tagValueOffset));
}
else
{
var array = new int[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetInt32(tagValueOffset + i * 4);
}
handler.SetInt32SArray(tagId, array);
}
break;
}
case TiffDataFormatCode.Int32U:
{
// NOTE 'long' in this case means 32 bit, not 64
if (componentCount == 1)
{
handler.SetInt32U(tagId, reader.GetUInt32(tagValueOffset));
}
else
{
var array = new uint[componentCount];
for (var i = 0; i < componentCount; i++)
{
array[i] = reader.GetUInt32(tagValueOffset + i * 4);
}
handler.SetInt32UArray(tagId, array);
}
break;
}
default:
{
handler.Error($"Invalid TIFF tag format code {formatCode} for tag 0x{tagId:X4}");
break;
}
}
}
public override bool CustomProcessTag(int tagOffset, ICollection <int> processedIfdOffsets, IndexedReader reader, int tagId, int byteCount)
{
// Some 0x0000 tags have a 0 byteCount. Determine whether it's bad.
if (tagId == 0)
{
if (CurrentDirectory.ContainsTag(tagId))
{
// Let it go through for now. Some directories handle it, some don't.
return(false);
}
// Skip over 0x0000 tags that don't have any associated bytes. No idea what it contains in this case, if anything.
if (byteCount == 0)
{
return(true);
}
}
// Custom processing for the Makernote tag
if (tagId == ExifDirectoryBase.TagMakernote && CurrentDirectory is ExifSubIfdDirectory)
{
return(ProcessMakernote(tagOffset, processedIfdOffsets, reader));
}
// Custom processing for embedded IPTC data
if (tagId == ExifDirectoryBase.TagIptcNaa && CurrentDirectory is ExifIfd0Directory)
{
// NOTE Adobe sets type 4 for IPTC instead of 7
if (reader.GetSByte(tagOffset) == 0x1c)
{
var iptcBytes = reader.GetBytes(tagOffset, byteCount);
var iptcDirectory = new IptcReader().Extract(new SequentialByteArrayReader(iptcBytes), iptcBytes.Length);
iptcDirectory.Parent = CurrentDirectory;
Directories.Add(iptcDirectory);
return(true);
}
return(false);
}
// Custom processing for embedded XMP data
if (tagId == ExifDirectoryBase.TagApplicationNotes && CurrentDirectory is ExifIfd0Directory)
{
var xmpDirectory = new XmpReader().Extract(reader.GetNullTerminatedBytes(tagOffset, byteCount));
xmpDirectory.Parent = CurrentDirectory;
Directories.Add(xmpDirectory);
return(true);
}
if (HandlePrintIM(CurrentDirectory, tagId))
{
var dirPrintIm = new PrintIMDirectory();
dirPrintIm.Parent = CurrentDirectory;
Directories.Add(dirPrintIm);
ProcessPrintIM(dirPrintIm, tagOffset, reader, byteCount);
return(true);
}
// Note: these also appear in TryEnterSubIfd because some are IFD pointers while others begin immediately
// for the same directories
if (CurrentDirectory is OlympusMakernoteDirectory)
{
switch (tagId)
{
case OlympusMakernoteDirectory.TagEquipment:
PushDirectory(new OlympusEquipmentMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagCameraSettings:
PushDirectory(new OlympusCameraSettingsMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagRawDevelopment:
PushDirectory(new OlympusRawDevelopmentMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagRawDevelopment2:
PushDirectory(new OlympusRawDevelopment2MakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagImageProcessing:
PushDirectory(new OlympusImageProcessingMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagFocusInfo:
PushDirectory(new OlympusFocusInfoMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagRawInfo:
PushDirectory(new OlympusRawInfoMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
case OlympusMakernoteDirectory.TagMainInfo:
PushDirectory(new OlympusMakernoteDirectory());
TiffReader.ProcessIfd(this, reader, processedIfdOffsets, tagOffset);
return(true);
}
}
if (CurrentDirectory is PanasonicRawIfd0Directory)
{
// these contain binary data with specific offsets, and can't be processed as regular ifd's.
// The binary data is broken into 'fake' tags and there is a pattern.
switch (tagId)
{
case PanasonicRawIfd0Directory.TagWbInfo:
var dirWbInfo = new PanasonicRawWbInfoDirectory();
dirWbInfo.Parent = CurrentDirectory;
Directories.Add(dirWbInfo);
ProcessBinary(dirWbInfo, tagOffset, reader, byteCount, false, 2);
return(true);
case PanasonicRawIfd0Directory.TagWbInfo2:
var dirWbInfo2 = new PanasonicRawWbInfo2Directory();
dirWbInfo2.Parent = CurrentDirectory;
Directories.Add(dirWbInfo2);
ProcessBinary(dirWbInfo2, tagOffset, reader, byteCount, false, 3);
return(true);
case PanasonicRawIfd0Directory.TagDistortionInfo:
var dirDistort = new PanasonicRawDistortionDirectory();
dirDistort.Parent = CurrentDirectory;
Directories.Add(dirDistort);
ProcessBinary(dirDistort, tagOffset, reader, byteCount);
return(true);
}
}
// Panasonic RAW sometimes contains an embedded version of the data as a JPG file.
if (tagId == PanasonicRawIfd0Directory.TagJpgFromRaw && CurrentDirectory is PanasonicRawIfd0Directory)
{
var jpegrawbytes = reader.GetBytes(tagOffset, byteCount);
// Extract information from embedded image since it is metadata-rich
var jpegmem = new MemoryStream(jpegrawbytes);
var jpegDirectory = Jpeg.JpegMetadataReader.ReadMetadata(jpegmem);
foreach (var dir in jpegDirectory)
{
dir.Parent = CurrentDirectory;
Directories.Add(dir);
}
return(true);
}
return(false);
}