/// <summary>
/// Attempts to extract the media properties of the main
/// photo.
/// </summary>
/// <returns>
/// A <see cref="Properties" /> object with a best effort guess
/// at the right values. When no guess at all can be made,
/// <see langword="null" /> is returned.
/// </returns>
private Properties ExtractProperties()
{
int width = 0, height = 0;
IFDTag tag = GetTag(TagTypes.TiffIFD) as IFDTag;
IFDStructure structure = tag.Structure;
width = (int)(structure.GetLongValue(0, 0x07) ?? 0);
height = (int)(structure.GetLongValue(0, 0x06) ?? 0);
var vendor = ImageTag.Make;
if (vendor == "LEICA")
{
vendor = "Leica";
}
var desc = String.Format("{0} RAW File", vendor);
if (width > 0 && height > 0)
{
return(new Properties(TimeSpan.Zero, new Codec(width, height, desc)));
}
return(null);
}
protected override Properties ExtractProperties()
{
int width = 0, height = 0;
IFDTag tag = GetTag(TagTypes.TiffIFD)
as IFDTag;
IFDStructure structure = tag.Structure;
var sub_ifds = structure.GetEntry(0, (ushort)IFDEntryTag.SubIFDs)
as SubIFDArrayEntry;
if (sub_ifds == null)
{
return(base.ExtractProperties());
}
foreach (var entry in sub_ifds.Entries)
{
var type = entry.GetLongValue(0, (ushort)IFDEntryTag.NewSubfileType);
if (type == 0)
{
width = (int)(entry.GetLongValue(0, (ushort)IFDEntryTag.ImageWidth) ?? 0);
height = (int)(entry.GetLongValue(0, (ushort)IFDEntryTag.ImageLength) ?? 0);
break;
}
}
if (width > 0 && height > 0)
{
return(new Properties(TimeSpan.Zero, CreateCodec(width, height)));
}
return(base.ExtractProperties());
}
/// <summary>
/// Construcor.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="type">
/// A <see cref="System.UInt16"/> with the type of the IFD entry.
/// </param>
/// <param name="count">
/// A <see cref="System.UInt32"/> with the count of the IFD entry.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> to be stored
/// </param>
public SubIFDEntry (ushort tag, ushort type, uint count, IFDStructure structure)
{
Tag = tag;
Type = type;
Count = count;
Structure = structure;
}
/// <summary>
/// Try to parse the given IFD entry, used to discover format-specific entries.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag of the entry.
/// </param>
/// <param name="type">
/// A <see cref="System.UInt16"/> with the type of the entry.
/// </param>
/// <param name="count">
/// A <see cref="System.UInt32"/> with the data count of the entry.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> with the base offset which every offsets in the
/// IFD are relative to.
/// </param>
/// <param name="offset">
/// A <see cref="System.UInt32"/> with the offset of the entry.
/// </param>
/// <returns>
/// A <see cref="IFDEntry"/> with the given parameters, or null if none was parsed, after
/// which the normal TIFF parsing is used.
/// </returns>
protected override IFDEntry ParseIFDEntry(ushort tag, ushort type, uint count, long base_offset, uint offset)
{
if (tag == (ushort)Nikon3MakerNoteEntryTag.Preview)
{
// SubIFD with Preview Image
// The entry itself is usually a long
// 2TODO: handle JPEGInterchangeFormat and JPEGInterchangeFormatLength correctly
// The preview field contains a long with an offset to an IFD
// that contains the preview image. We need to be careful
// though: this IFD does not contain a valid next-offset
// pointer. For this reason, we only read the first IFD and
// ignore the rest (which is preview image data, directly
// starting after the IFD entries).
type = (ushort)IFDEntryType.IFD;
IFDStructure ifd_structure = new IFDStructure();
IFDReader reader = CreateSubIFDReader(file, is_bigendian, ifd_structure, base_offset, offset, max_offset);
reader.Read(1);
return(new SubIFDEntry(tag, type, (uint)ifd_structure.Directories.Length, ifd_structure));
}
return(base.ParseIFDEntry(tag, type, count, base_offset, offset));
}
/// <summary>
/// Construcor.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="type">
/// A <see cref="System.UInt16"/> with the type of the IFD entry.
/// </param>
/// <param name="count">
/// A <see cref="System.UInt32"/> with the count of the IFD entry.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> to be stored
/// </param>
public SubIFDEntry(ushort tag, ushort type, uint count, IFDStructure structure)
{
Tag = tag;
Type = type;
Count = count;
Structure = structure;
}
/// <summary>
/// Attempts to extract the media properties of the main
/// photo.
/// </summary>
/// <returns>
/// A <see cref="Properties" /> object with a best effort guess
/// at the right values. When no guess at all can be made,
/// <see langword="null" /> is returned.
/// </returns>
protected override Properties ExtractProperties()
{
int width = 0, height = 0;
IFDTag tag = GetTag(TagTypes.TiffIFD) as IFDTag;
IFDStructure structure = tag.Structure;
// DNG uses SubIFDs for images, the one with SubfileType = 0 is the RAW data.
var sub_ifds = structure.GetEntry(0, (ushort)IFDEntryTag.SubIFDs) as SubIFDArrayEntry;
if (sub_ifds == null)
{
return(base.ExtractProperties());
}
foreach (var entry in sub_ifds.Entries)
{
var type = entry.GetLongValue(0, (ushort)IFDEntryTag.NewSubfileType);
if (type == 0)
{
width = (int)(entry.GetLongValue(0, (ushort)IFDEntryTag.ImageWidth) ?? 0);
height = (int)(entry.GetLongValue(0, (ushort)IFDEntryTag.ImageLength) ?? 0);
break; // No need to iterate the other SubIFDs
}
}
if (width > 0 && height > 0)
{
return(new Properties(TimeSpan.Zero, CreateCodec(width, height)));
}
// Fall back to normal detection.
return(base.ExtractProperties());
}
/// <summary>
/// Construcor.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> with the IFD structure, which is stored by this
/// instance
/// </param>
/// <param name="makernoteType">
/// A <see cref="MakernoteType"/> with the type of the makernote.
/// </param>
/// <param name="prefix">
/// A <see cref="ByteVector"/> containing the prefix, which should be rendered
/// before the real IFD.
/// </param>
/// <param name="ifdOffset">
/// A <see cref="System.UInt32"/> with the offset in addition to the relative
/// offsets in the IFD
/// </param>
/// <param name="absoluteOffset">
/// A <see cref="System.Boolean"/> indicating if the offsets of the IFD are relative
/// to the <paramref name="ifdOffset"/>, or absolut to the base offset of the
/// surrounding IFD.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Nullable"/> indicating if the current IFD is encoded in
/// big- or little endian. It it is <see langword="null"/>, the endianess of the
/// surrounding IFD is used.
/// </param>
public MakernoteIFDEntry(ushort tag, IFDStructure structure, MakernoteType makernoteType, ByteVector prefix, uint ifdOffset, bool absoluteOffset, bool?is_bigendian)
{
Tag = tag;
Structure = structure;
MakernoteType = makernoteType;
this.prefix = prefix;
this.ifd_offset = ifdOffset;
this.absolute_offset = absoluteOffset;
this.is_bigendian = is_bigendian;
}
protected override IFDEntry ParseIFDEntry(ushort tag, ushort type, uint count, long base_offset, uint offset)
{
if (tag == (ushort)Nikon3MakerNoteEntryTag.Preview)
{
type = (ushort)IFDEntryType.IFD;
IFDStructure ifd_structure = new IFDStructure();
IFDReader reader = CreateSubIFDReader(file, is_bigendian, ifd_structure, base_offset, offset, max_offset);
reader.Read(1);
return(new SubIFDEntry(tag, type, (uint)ifd_structure.Directories.Length, ifd_structure));
}
return(base.ParseIFDEntry(tag, type, count, base_offset, offset));
}
protected virtual Properties ExtractProperties()
{
int width = 0, height = 0;
IFDTag tag = GetTag(TagTypes.TiffIFD)
as IFDTag;
IFDStructure structure = tag.Structure;
width = (int)(structure.GetLongValue(0, (ushort)IFDEntryTag.ImageWidth) ?? 0);
height = (int)(structure.GetLongValue(0, (ushort)IFDEntryTag.ImageLength) ?? 0);
if (width > 0 && height > 0)
{
return(new Properties(TimeSpan.Zero, CreateCodec(width, height)));
}
return(null);
}
/// <summary>
/// Creates an IFD reader to parse the file.
/// </summary>
/// <param name="file">
/// A <see cref="File"/> to read from.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Boolean"/>, it must be true, if the data of the IFD should be
/// read as bigendian, otherwise false.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> that will be populated.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> value describing the base were the IFD offsets
/// refer to. E.g. in Jpegs the IFD are located in an Segment and the offsets
/// inside the IFD refer from the beginning of this segment. So <paramref
/// name="base_offset"/> must contain the beginning of the segment.
/// </param>
/// <param name="ifd_offset">
/// A <see cref="System.UInt32"/> value with the beginning of the IFD relative to
/// <paramref name="base_offset"/>.
/// </param>
/// <param name="max_offset">
/// A <see cref="System.UInt32"/> value with maximal possible offset. This is to limit
/// the size of the possible data;
/// </param>
protected virtual IFDReader CreateIFDReader(BaseTiffFile file, bool is_bigendian, IFDStructure structure, long base_offset, uint ifd_offset, uint max_offset)
{
return(new IFDReader(file, is_bigendian, structure, base_offset, ifd_offset, max_offset));
}
/// <summary>
/// Constructor. Creates a makernote instance just containing an IFD and
/// without any special prefix or offset behavior.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> with the IFD structure, which is stored by this
/// instance
/// </param>
/// <param name="makernote_type">
/// A <see cref="MakernoteType"/> with the type of the makernote.
/// </param>
public MakernoteIFDEntry(ushort tag, IFDStructure structure, MakernoteType makernote_type)
: this(tag, structure, makernote_type, null, 0, true, null)
{
}
static string structDumper(IFDStructure st, ushort tagParentCode, StringBuilder blsExt = null, int recurse = 0)
{
//Encoding enc = Encoding.GetEncoding(1251);
Encoding enc = Encoding.Unicode;
string pref = string.Empty;
if (recurse > 0)
{
for (int i = 0; i < recurse; ++i)
{
pref += "\t";
}
}
System.Text.StringBuilder bld = blsExt ?? new System.Text.StringBuilder();
bld.AppendFormat("{0}Directories Count = {1}\r\n", pref, st.Directories.Length);
Type enumFldType = typeof(IFDEntryTag);
if (tagParentCode != 0)
{
if (tagParentCode == (ushort)IFDEntryTag.ExifIFD)
{
enumFldType = typeof(ExifEntryTag);
}
else if (tagParentCode == (ushort)IFDEntryTag.GPSIFD)
{
enumFldType = typeof(GPSEntryTag);
}
else if (tagParentCode == (ushort)IFDEntryTag.OPIProxy)
{
enumFldType = typeof(IOPEntryTag);
}
}
int cnt = 1;
foreach (IFDDirectory dir in st.Directories)
{
bld.AppendFormat("{0}Dir {1}:\r\n", pref, cnt++);
foreach (var kv in dir)
{
string tagName = null;
try { tagName = Enum.GetName(enumFldType, kv.Key); }
catch { };
if (string.IsNullOrEmpty(tagName))
{
tagName = kv.Key.ToString();
}
bld.AppendFormat("{0}{1}/{2}: ", pref, tagName, kv.Value.GetType().Name);
if (kv.Value.GetType().GetProperty("Value") != null)
{
dynamic d = kv.Value;
bld.Append(d.Value);
}
if (kv.Value is ByteVectorIFDEntry)
{
ByteVectorIFDEntry bv = (ByteVectorIFDEntry)kv.Value;
bld.AppendFormat(" len = {0}, [{1}]", bv.Data.Data.Length, enc.GetString(bv.Data.Data));
}
else if (kv.Value is UndefinedIFDEntry)
{
UndefinedIFDEntry ue = (UndefinedIFDEntry)kv.Value;
bld.AppendFormat(" len = {0}, [{1}]", ue.Data.Data.Length, enc.GetString(ue.Data.Data));
}
else if (kv.Value is SubIFDEntry)
{
SubIFDEntry sub = (SubIFDEntry)kv.Value;
structDumper(sub.Structure, sub.Tag, bld, recurse + 1);
}
bld.AppendLine();
}
}
return(blsExt == null?bld.ToString() : string.Empty);
}
/// <summary>
/// Try to parse the given IFD entry, used to discover format-specific entries.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag of the entry.
/// </param>
/// <param name="type">
/// A <see cref="System.UInt16"/> with the type of the entry.
/// </param>
/// <param name="count">
/// A <see cref="System.UInt32"/> with the data count of the entry.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> with the base offset which every offsets in the
/// IFD are relative to.
/// </param>
/// <param name="offset">
/// A <see cref="System.UInt32"/> with the offset of the entry.
/// </param>
/// <returns>
/// A <see cref="IFDEntry"/> with the given parameters, or null if none was parsed, after
/// which the normal TIFF parsing is used.
/// </returns>
protected override IFDEntry ParseIFDEntry (ushort tag, ushort type, uint count, long base_offset, uint offset)
{
if (tag == (ushort) Nikon3MakerNoteEntryTag.Preview) {
// SubIFD with Preview Image
// The entry itself is usually a long
// TODO: handle JPEGInterchangeFormat and JPEGInterchangeFormatLength correctly
// The preview field contains a long with an offset to an IFD
// that contains the preview image. We need to be careful
// though: this IFD does not contain a valid next-offset
// pointer. For this reason, we only read the first IFD and
// ignore the rest (which is preview image data, directly
// starting after the IFD entries).
type = (ushort) IFDEntryType.IFD;
IFDStructure ifd_structure = new IFDStructure ();
IFDReader reader = CreateSubIFDReader (file, is_bigendian, ifd_structure, base_offset, offset, max_offset);
reader.Read (1);
return new SubIFDEntry (tag, type, (uint) ifd_structure.Directories.Length, ifd_structure);
}
return base.ParseIFDEntry (tag, type, count, base_offset, offset);
}
/// <summary>
/// Constructor. Reads an IFD from given file, using the given endianness.
/// </summary>
/// <param name="file">
/// A <see cref="File"/> to read from.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Boolean"/>, it must be true, if the data of the IFD should be
/// read as bigendian, otherwise false.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> that will be populated.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> value describing the base were the IFD offsets
/// refer to. E.g. in Jpegs the IFD are located in an Segment and the offsets
/// inside the IFD refer from the beginning of this segment. So <paramref
/// name="base_offset"/> must contain the beginning of the segment.
/// </param>
/// <param name="ifd_offset">
/// A <see cref="System.UInt32"/> value with the beginning of the IFD relative to
/// <paramref name="base_offset"/>.
/// </param>
/// <param name="max_offset">
/// A <see cref="System.UInt32"/> value with maximal possible offset. This is to limit
/// the size of the possible data;
/// </param>
public Nikon3MakernoteReader (File file, bool is_bigendian, IFDStructure structure, long base_offset, uint ifd_offset, uint max_offset) :
base (file, is_bigendian, structure, base_offset, ifd_offset, max_offset)
{
}
/// <summary>
/// Constructor. Reads an IFD from given file, using the given endianness.
/// </summary>
/// <param name="file">
/// A <see cref="File"/> to read from.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Boolean"/>, it must be true, if the data of the IFD should be
/// read as bigendian, otherwise false.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> that will be populated.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> value describing the base were the IFD offsets
/// refer to. E.g. in Jpegs the IFD are located in an Segment and the offsets
/// inside the IFD refer from the beginning of this segment. So <paramref
/// name="base_offset"/> must contain the beginning of the segment.
/// </param>
/// <param name="ifd_offset">
/// A <see cref="System.UInt32"/> value with the beginning of the IFD relative to
/// <paramref name="base_offset"/>.
/// </param>
/// <param name="max_offset">
/// A <see cref="System.UInt32"/> value with maximal possible offset. This is to limit
/// the size of the possible data;
/// </param>
public IFDReader(BaseTiffFile file, bool is_bigendian, IFDStructure structure, long base_offset, uint ifd_offset, uint max_offset) :
base(file, is_bigendian, structure, base_offset, ifd_offset, max_offset)
{
}
/// <summary>
/// Constructor. Reads an IFD from given file, using the given endianness.
/// </summary>
/// <param name="file">
/// A <see cref="File"/> to read from.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Boolean"/>, it must be true, if the data of the IFD should be
/// read as bigendian, otherwise false.
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> that will be populated.
/// </param>
/// <param name="base_offset">
/// A <see cref="System.Int64"/> value describing the base were the IFD offsets
/// refer to. E.g. in Jpegs the IFD are located in an Segment and the offsets
/// inside the IFD refer from the beginning of this segment. So <paramref
/// name="base_offset"/> must contain the beginning of the segment.
/// </param>
/// <param name="ifd_offset">
/// A <see cref="System.UInt32"/> value with the beginning of the IFD relative to
/// <paramref name="base_offset"/>.
/// </param>
/// <param name="max_offset">
/// A <see cref="System.UInt32"/> value with maximal possible offset. This is to limit
/// the size of the possible data;
/// </param>
public Nikon3MakernoteReader(File file, bool is_bigendian, IFDStructure structure, long base_offset, uint ifd_offset, uint max_offset) :
base(file, is_bigendian, structure, base_offset, ifd_offset, max_offset)
{
}
/// <summary>
/// Construcor.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> with the IFD structure, which is stored by this
/// instance
/// </param>
/// <param name="makernote_type">
/// A <see cref="MakernoteType"/> with the type of the makernote.
/// </param>
/// <param name="prefix">
/// A <see cref="ByteVector"/> containing the prefix, which should be rendered
/// before the real IFD.
/// </param>
/// <param name="ifd_offset">
/// A <see cref="System.UInt32"/> with the offset in addition to the relative
/// offsets in the IFD
/// </param>
/// <param name="absolute_offset">
/// A <see cref="System.Boolean"/> indicating if the offsets of the IFD are relative
/// to the <paramref name="ifd_offset"/>, or absolut to the base offset of the
/// surrounding IFD.
/// </param>
/// <param name="is_bigendian">
/// A <see cref="System.Nullable"/> indicating if the current IFD is encoded in
/// big- or little endian. It it is <see langword="null"/>, the endianess of the
/// surrounding IFD is used.
/// </param>
public MakernoteIFDEntry (ushort tag, IFDStructure structure, MakernoteType makernote_type, ByteVector prefix, uint ifd_offset, bool absolute_offset, bool? is_bigendian)
{
Tag = tag;
Structure = structure;
MakernoteType = makernote_type;
this.prefix = prefix;
this.ifd_offset = ifd_offset;
this.absolute_offset = absolute_offset;
this.is_bigendian = is_bigendian;
}
/// <summary>
/// Constructor. Creates a makernote instance just containing an IFD and
/// without any special prefix or offset behavior.
/// </summary>
/// <param name="tag">
/// A <see cref="System.UInt16"/> with the tag ID of the entry this instance
/// represents
/// </param>
/// <param name="structure">
/// A <see cref="IFDStructure"/> with the IFD structure, which is stored by this
/// instance
/// </param>
/// <param name="makernote_type">
/// A <see cref="MakernoteType"/> with the type of the makernote.
/// </param>
public MakernoteIFDEntry (ushort tag, IFDStructure structure, MakernoteType makernote_type)
: this (tag, structure, makernote_type, null, 0, true, null) {}
static void ParsePhoto(string path)
{
TagLib.File file = null;
try {
file = TagLib.File.Create(path);
} catch (TagLib.UnsupportedFormatException) {
Console.WriteLine("UNSUPPORTED FILE: " + path);
Console.WriteLine(String.Empty);
Console.WriteLine("---------------------------------------");
Console.WriteLine(String.Empty);
return;
}
var image = file as TagLib.Image.File;
if (file == null)
{
Console.WriteLine("NOT AN IMAGE FILE: " + path);
Console.WriteLine(String.Empty);
Console.WriteLine("---------------------------------------");
Console.WriteLine(String.Empty);
return;
}
Console.WriteLine(String.Empty);
Console.WriteLine(path);
Console.WriteLine(String.Empty);
Console.WriteLine("Tags in object : " + image.TagTypes);
Console.WriteLine(String.Empty);
Console.WriteLine("Comment : " + image.ImageTag.Comment);
Console.Write("Keywords : ");
foreach (var keyword in image.ImageTag.Keywords)
{
Console.Write(keyword + " ");
}
Console.WriteLine(String.Empty);
Console.WriteLine("Title : " + image.ImageTag.Title);
Console.WriteLine("Copyright : " + image.ImageTag.Copyright);
Console.WriteLine();
Console.WriteLine("Rating : " + image.ImageTag.Rating);
Console.WriteLine("DateTime : " + image.ImageTag.DateTime);
Console.WriteLine("Orientation : " + image.ImageTag.Orientation);
Console.WriteLine("Software : " + image.ImageTag.Software);
Console.WriteLine("ExposureTime : " + image.ImageTag.ExposureTime);
Console.WriteLine("FNumber : " + image.ImageTag.FNumber);
Console.WriteLine("ISOSpeedRatings : " + image.ImageTag.ISOSpeedRatings);
Console.WriteLine("FocalLength : " + image.ImageTag.FocalLength);
Console.WriteLine("FocalLength35mm : " + image.ImageTag.FocalLengthIn35mmFilm);
Console.WriteLine("Make : " + image.ImageTag.Make);
Console.WriteLine("Model : " + image.ImageTag.Model);
if (image.Properties != null)
{
Console.WriteLine("Width : " + image.Properties.PhotoWidth);
Console.WriteLine("Height : " + image.Properties.PhotoHeight);
Console.WriteLine("Type : " + image.Properties.Description);
}
Console.WriteLine();
Console.WriteLine("Writable? : " + image.Writeable.ToString());
Console.WriteLine("Corrupt? : " + image.PossiblyCorrupt.ToString());
if (image.PossiblyCorrupt)
{
foreach (string reason in image.CorruptionReasons)
{
Console.WriteLine(" * " + reason);
}
}
Console.WriteLine("tag types = " + file.TagTypes);
string lens = image.ImageTag.Xmp.GetLangAltNode("http://ns.adobe.com/exif/1.0/aux/", "Lens");
Console.WriteLine("Lens = " + lens);
IFDTag tag = file.GetTag(TagTypes.TiffIFD) as IFDTag;
IFDStructure struc = tag.Structure;
Console.WriteLine(structDumper(struc, (ushort)0));
/*SubIFDEntry sub = struc.GetEntry(0, (ushort)IFDEntryTag.ExifIFD) as SubIFDEntry;
* IFDStructure exif_structure = sub.Structure;
* MakernoteIFDEntry makernote = exif_structure.GetEntry(0, (ushort)ExifEntryTag.MakerNote) as MakernoteIFDEntry;
* makernote = struc.GetEntry(0, (ushort)ExifEntryTag.MakerNote) as MakernoteIFDEntry;
* IFDStructure makernote_struct = makernote.Structure;
* IFDEntry entry = makernote_struct.GetEntry(0, (ushort)CanonMakerNoteEntryTag.LensModel);
* Console.WriteLine("Lens : " + (entry as StringIFDEntry).Value);*/
Console.WriteLine("---------------------------------------");
}