/// <summary>
/// Gets a directory regarding its type
/// </summary>
/// <param name="aTypeStr">the type you are looking for</param>
/// <returns>the directory found</returns>
/// <exception cref="ArgumentException">if aType is not a Directory like class</exception>
public AbstractDirectory GetDirectory(string aTypeStr)
{
Type aType = Type.GetType(aTypeStr);
if (!Type.GetType("com.drew.metadata.AbstractDirectory").IsAssignableFrom(aType))
{
throw new ArgumentException("Class type passed to GetDirectory must be an implementation of com.drew.metadata.AbstractDirectory");
}
// check if we've already issued this type of directory
if (this.ContainsDirectory(aType))
{
return(directoryMap[aType]);
}
AbstractDirectory lcDirectory = null;
try
{
ConstructorInfo[] lcConstructor = aType.GetConstructors();
lcDirectory = (AbstractDirectory)lcConstructor[0].Invoke(null);
}
catch (Exception e)
{
throw new SystemException(
"Cannot instantiate provided Directory type: "
+ aType, e);
}
// store the directory in case it'str requested later
this.directoryMap.Add(aType, lcDirectory);
return(lcDirectory);
}
/// <summary>
/// Creates a new Directory.
/// </summary>
/// <param name="aBundleName">bundle name for this directory</param>
protected AbstractDirectory(string aBundleName)
: this()
{
this.BundleName = aBundleName;
// Load the bundle
IResourceBundle bundle = ResourceBundleFactory.CreateDefaultBundle(aBundleName);
AbstractDirectory.tagNameMap[this.GetType()] = AbstractDirectory.FillTagMap(this.GetType(), bundle);
}
/// <summary>
/// Returns the specified tag value as a date, if possible.
/// </summary>
/// <param name="aTagType">the specified tag type</param>
/// <returns>the specified tag value as a date, if possible.</returns>
public DateTime GetDate(int aTagType)
{
object lcObj = GetObject(aTagType);
if (lcObj == null)
{
throw new MetadataException(
"Tag "
+ GetTagName(aTagType)
+ " has not been set -- check using containsTag() first");
}
else if (lcObj is DateTime)
{
return((DateTime)lcObj);
}
else if (lcObj is string)
{
string lcDateString = (string)lcObj;
try
{
DateTime res = DateTime.Today;
if (DateTime.TryParse(lcDateString, out res))
{
return(res);
}
// Was not able to parse date using standard format
// We try the following format
DateTime resu = AbstractDirectory.ParseDate(lcDateString);
if (resu == DateTime.Today)
{
Trace.TraceWarning("Was not able to parse date '" + lcDateString + "'");
}
return(resu);
}
catch { }
}
throw new MetadataException("Obj is :" + lcObj.GetType() + " and look like:" + lcObj.ToString());
}
/// <summary>
/// Creates a directory tag.
///
/// Examples :
/// <pre>
/// <directory name="Exif">
/// <tag>
/// ...
/// </tag>
/// <tag>
/// ...
/// </tag>
/// </directory>
/// </pre>
/// </summary>
/// <param name="aBuff">where to put info</param>
/// <param name="aDirectory">the information to add</param>
protected virtual void CreateDirectory(StringBuilder aBuff, AbstractDirectory aDirectory)
{
if (aDirectory != null)
{
Open(aBuff, "directory name=\"" + aDirectory.GetName() + "\"", true);
foreach(Tag lcTag in aDirectory) {
CreateTag(aBuff, lcTag);
}
Close(aBuff, "directory", true);
}
}
/// <summary>
/// Creates a directory tag.
/// </summary>
/// <param name="aBuff">where to put info</param>
/// <param name="aDirectory">the information to add</param>
protected virtual void CreateDirectory(StringBuilder aBuff, AbstractDirectory aDirectory)
{
if (aDirectory != null)
{
aBuff.Append("--| ").Append(aDirectory.GetName()).Append(" |--");
aBuff.AppendLine();
foreach(Tag lcTag in aDirectory) {
CreateTag(aBuff, lcTag);
}
}
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public KyoceraDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public CasioType1Descriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="directory">a directory</param>
public JpegDescriptor(AbstractDirectory directory)
: base(directory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="base.directory">a base.directory</param>
public ExifInteropDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Creates a directory tag.
///
/// Examples :
/// <pre>
/// <directory name="Exif">
/// <tag>
/// ...
/// </tag>
/// <tag>
/// ...
/// </tag>
/// </directory>
/// </pre>
/// </summary>
/// <param name="aBuff">where to put info</param>
/// <param name="aDirectory">the information to add</param>
protected virtual void CreateDirectory(StringBuilder aBuff, AbstractDirectory aDirectory)
{
if (aDirectory != null)
{
this.Open(aBuff, "directory", "name", aDirectory.GetName(),"class", aDirectory.GetType(), true);
foreach(Tag lcTag in aDirectory){
this.CreateTag(aBuff, lcTag);
}
this.Close(aBuff, "directory", true);
}
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public PanasonicDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Will stock the thumbnail into exif directory if available.
/// </summary>
/// <param name="exifDirectory">where to stock the thumbnail</param>
/// <param name="tiffHeaderOffset">the tiff lcHeader lcOffset value</param>
private void StoreThumbnailBytes(AbstractDirectory exifDirectory, int tiffHeaderOffset)
{
if (!exifDirectory.ContainsTag(ExifDirectory.TAG_COMPRESSION))
{
return;
}
if (!exifDirectory.ContainsTag(ExifDirectory.TAG_THUMBNAIL_LENGTH) ||
!exifDirectory.ContainsTag(ExifDirectory.TAG_THUMBNAIL_OFFSET))
{
return;
}
try
{
int offset = exifDirectory.GetInt(ExifDirectory.TAG_THUMBNAIL_OFFSET);
int length = exifDirectory.GetInt(ExifDirectory.TAG_THUMBNAIL_LENGTH);
byte[] result = new byte[length];
for (int i = 0; i < result.Length; i++)
{
result[i] = base.data[tiffHeaderOffset + offset + i];
}
exifDirectory.SetObject(ExifDirectory.TAG_THUMBNAIL_DATA, result);
}
catch (Exception e)
{
exifDirectory.HasError = true;
Trace.TraceError("Unable to extract thumbnail: " + e.Message);
}
}
/// <summary>
/// Processes tag
/// </summary>
/// <param name="directory">the directory</param>
/// <param name="aTagType">the tag type</param>
/// <param name="tagValueOffset">the lcOffset value</param>
/// <param name="componentCount">the component count</param>
/// <param name="formatCode">the format code</param>
private void ProcessTag(
AbstractDirectory directory,
int tagType,
int tagValueOffset,
int componentCount,
int formatCode)
{
// Directory simply stores raw values
// The display side uses a Descriptor class per directory to turn the raw values into 'pretty' descriptions
switch (formatCode)
{
case FMT_UNDEFINED:
Debug.Write("Found a tag made of bytes");
// this includes exif user comments
byte[] tagBytes = new byte[componentCount];
int byteCount = componentCount * BYTES_PER_FORMAT[formatCode];
for (int i = 0; i < byteCount; i++)
{
tagBytes[i] = base.data[tagValueOffset + i];
}
directory.SetObject(tagType, tagBytes);
break;
case FMT_STRING:
Debug.Write("Found a tag made of string");
string lcStr = null;
if (tagType == ExifDirectory.TAG_USER_COMMENT)
{
lcStr =
ReadCommentString(
tagValueOffset,
componentCount,
formatCode);
}
else
{
lcStr = ReadString(tagValueOffset, componentCount);
}
directory.SetObject(tagType, lcStr);
break;
case FMT_SRATIONAL: //goto case FMT_URATIONAL;
case FMT_URATIONAL:
if (componentCount == 1)
{
Debug.Write("Found a tag made of rational");
Rational rational = new Rational(Get32Bits(tagValueOffset), Get32Bits(tagValueOffset + 4));
directory.SetObject(tagType, rational);
}
else
{
Debug.Write("Found a tag made of rationals");
Rational[] rationals = new Rational[componentCount];
for (int i = 0; i < componentCount; i++)
{
rationals[i] = new Rational(Get32Bits(tagValueOffset + (8 * i)), Get32Bits(tagValueOffset + 4 + (8 * i)));
}
directory.SetObject(tagType, rationals);
}
break;
case FMT_SBYTE: //goto case FMT_BYTE;
case FMT_BYTE:
if (componentCount == 1)
{
Debug.Write("Found a tag made of byte");
// this may need to be a byte, but I think casting to int is fine
int b = base.data[tagValueOffset];
directory.SetObject(tagType, b);
}
else
{
Debug.Write("Found a tag made of bytes but will use ints");
int[] bytes = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
bytes[i] = base.data[tagValueOffset + i];
}
directory.SetIntArray(tagType, bytes);
}
break;
case FMT_SINGLE: //goto case FMT_DOUBLE;
case FMT_DOUBLE:
if (componentCount == 1)
{
Debug.Write("Found a tag made of double but will use int");
int i = base.data[tagValueOffset];
directory.SetObject(tagType, i);
}
else
{
Debug.Write("Found a tag made of doubles but will use ints");
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = base.data[tagValueOffset + i];
}
directory.SetIntArray(tagType, ints);
}
break;
case FMT_USHORT: //goto case FMT_SSHORT;
case FMT_SSHORT:
if (componentCount == 1)
{
Debug.Write("Found a tag made of short but will use int");
int i = Get16Bits(tagValueOffset);
directory.SetObject(tagType, i);
}
else
{
Debug.Write("Found a tag made of shorts but will use ints");
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = Get16Bits(tagValueOffset + (i * 2));
}
directory.SetIntArray(tagType, ints);
}
break;
case FMT_SLONG: //goto case FMT_ULONG;
case FMT_ULONG:
if (componentCount == 1)
{
Debug.Write("Found a tag made of long but will use int");
int i = Get32Bits(tagValueOffset);
directory.SetObject(tagType, i);
}
else
{
Debug.Write("Found a tag made of longs but will use ints");
int[] ints = new int[componentCount];
for (int i = 0; i < componentCount; i++)
{
ints[i] = Get32Bits(tagValueOffset + (i * 4));
}
directory.SetIntArray(tagType, ints);
}
break;
default:
Trace.TraceWarning("Unknown format code " + formatCode + " for tag " + tagType);
break;
}
}
/// <summary>
/// Process one of the nested Tiff IFD directories.
/// 2 bytes: number of tags for each tag
/// 2 bytes: tag type
/// 2 bytes: format code
/// 4 bytes: component count
/// </summary>
/// <param name="directory">the directory</param>
/// <param name="dirStartOffSet">where to start</param>
private void ProcessDirectory(AbstractDirectory directory, IDictionary<int, string> processedDirectoryOffsets, int dirStartOffset, int tiffHeaderOffset)
{
// check for directories we've already visited to avoid stack overflows when recursive/cyclic directory structures exist
if (processedDirectoryOffsets.ContainsKey(dirStartOffset))
{
return;
}
// remember that we've visited this directory so that we don't visit it again later
processedDirectoryOffsets.Add(dirStartOffset, MARK_AS_PROCESSED);
if (dirStartOffset >= base.data.Length || dirStartOffset < 0)
{
directory.HasError = true;
Trace.TraceError("Ignored directory marked to start outside data segement");
return;
}
if (!IsDirectoryLengthValid(dirStartOffset, tiffHeaderOffset))
{
directory.HasError = true;
Trace.TraceError("Illegally sized directory");
return;
}
// First two bytes in the IFD are the tag count
int dirTagCount = Get16Bits(dirStartOffset);
// Handle each tag in this directory
for (int tagNumber = 0; tagNumber < dirTagCount; tagNumber++)
{
int tagOffset = CalculateTagOffset(dirStartOffset, tagNumber);
// 2 bytes for the tag type
int tagType = Get16Bits(tagOffset);
// 2 bytes for the format code
int formatCode = Get16Bits(tagOffset + 2);
if (formatCode < 1 || formatCode > MAX_FORMAT_CODE)
{
directory.HasError = true;
Trace.TraceError("Invalid format code: " + formatCode);
continue;
}
// 4 bytes dictate the number of components in this tag'lcStr data
int componentCount = Get32Bits(tagOffset + 4);
if (componentCount < 0)
{
directory.HasError = true;
Trace.TraceError("Negative component count in EXIF");
continue;
}
// each component may have more than one byte... calculate the total number of bytes
int byteCount = componentCount * BYTES_PER_FORMAT[formatCode];
int tagValueOffset = CalculateTagValueOffset(byteCount, tagOffset, tiffHeaderOffset);
if (tagValueOffset < 0 || tagValueOffset > base.data.Length)
{
directory.HasError = true;
Trace.TraceError("Illegal pointer offset value in EXIF");
continue;
}
// Check that this tag isn't going to allocate outside the bounds of the data array.
// This addresses an uncommon OutOfMemoryError.
if (byteCount < 0 || tagValueOffset + byteCount > base.data.Length)
{
directory.HasError = true;
Trace.TraceError("Illegal number of bytes: " + byteCount);
continue;
}
// Calculate the value as an lcOffset for cases where the tag represents directory
int subdirOffset = tiffHeaderOffset + Get32Bits(tagValueOffset);
switch (tagType)
{
case TAG_EXIF_OFFSET:
ProcessDirectory(this.metadata.GetDirectory("com.drew.metadata.exif.ExifDirectory"), processedDirectoryOffsets, subdirOffset, tiffHeaderOffset);
continue;
case TAG_INTEROP_OFFSET:
ProcessDirectory(this.metadata.GetDirectory("com.drew.metadata.exif.ExifInteropDirectory"), processedDirectoryOffsets, subdirOffset, tiffHeaderOffset);
continue;
case TAG_GPS_INFO_OFFSET:
ProcessDirectory(this.metadata.GetDirectory("com.drew.metadata.exif.GpsDirectory"), processedDirectoryOffsets, subdirOffset, tiffHeaderOffset);
continue;
case TAG_MAKER_NOTE:
ProcessMakerNote(tagValueOffset, processedDirectoryOffsets, tiffHeaderOffset);
continue;
default:
ProcessTag(directory, tagType, tagValueOffset, componentCount, formatCode);
break;
}
} // End of for
// at the end of each IFD is an optional link to the next IFD
int finalTagOffset = CalculateTagOffset(dirStartOffset, dirTagCount);
int nextDirectoryOffset = Get32Bits(finalTagOffset);
if (nextDirectoryOffset != 0)
{
nextDirectoryOffset += tiffHeaderOffset;
if (nextDirectoryOffset >= base.data.Length)
{
Trace.TraceWarning("Last 4 bytes of IFD reference another IFD with an address that is out of bounds\nNote this could have been caused by jhead 1.3 cropping too much");
return;
}
else if (nextDirectoryOffset < dirStartOffset)
{
Trace.TraceWarning("Last 4 bytes of IFD reference another IFD with an address that is before the start of this directory");
return;
}
// the next directory is of same type as this one
ProcessDirectory(directory, processedDirectoryOffsets, nextDirectoryOffset, tiffHeaderOffset);
}
}
/// <summary>
/// Creates a directory tag.
/// </summary>
/// <param name="aBuff">where to put info</param>
/// <param name="aDirectory">the information to add</param>
protected virtual void CreateDirectory(StringBuilder aBuff, AbstractDirectory aDirectory)
{
if (aDirectory != null)
{
aBuff.Append("--| ").Append(aDirectory.GetName()).Append(" |--");
aBuff.AppendLine();
IEnumerator<Tag> lcTagsEnum = aDirectory.GetTagIterator();
while (lcTagsEnum.MoveNext())
{
Tag lcTag = lcTagsEnum.Current;
CreateTag(aBuff, lcTag);
lcTag = null;
}
}
}
/// <summary>
/// This method serves as marsheller of objects for dataset.
/// It converts from IPTC octets to relevant java object.
/// </summary>
/// <param name="aDirectory">the directory</param>
/// <param name="aDirectoryType">the directory type</param>
/// <param name="aTagType">the tag type</param>
/// <param name="anOffset">the lcOffset</param>
/// <param name="aTagByteCount">the tag byte count</param>
private void ProcessTag(
AbstractDirectory aDirectory,
int aDirectoryType,
int aTagType,
int anOffset,
int aTagByteCount)
{
int tagIdentifier = aTagType | (aDirectoryType << 8);
switch (tagIdentifier)
{
case IptcDirectory.TAG_RECORD_VERSION:
// short
short shortValue = (short)((base.data[anOffset] << 8) | base.data[anOffset + 1]);
aDirectory.SetObject(tagIdentifier, shortValue);
return;
case IptcDirectory.TAG_URGENCY:
// byte
aDirectory.SetObject(tagIdentifier, base.data[anOffset]);
return;
case IptcDirectory.TAG_RELEASE_DATE:
case IptcDirectory.TAG_DATE_CREATED:
// Date object
if (aTagByteCount >= 8)
{
string dateStr = Utils.Decode(base.data, anOffset, aTagByteCount, false);
try
{
int year = Convert.ToInt32(dateStr.Substring(0, 4));
int month = Convert.ToInt32(dateStr.Substring(4, 2)); //No -1 here;
int day = Convert.ToInt32(dateStr.Substring(6, 2));
DateTime date = new DateTime(year, month, day);
aDirectory.SetObject(tagIdentifier, date);
return;
}
catch (Exception)
{
// fall through and we'll store whatever was there as a String
}
}
break; // Added for .Net compiler
//case IptcDirectory.TAG_RELEASE_TIME:
//case IptcDirectory.TAG_TIME_CREATED:
}
// If no special handling by now, treat it as a string
string str = null;
if (aTagByteCount < 1)
{
str = "";
}
else
{
str = Utils.Decode(base.data, anOffset, aTagByteCount, false);
}
if (aDirectory.ContainsTag(tagIdentifier))
{
string[] oldStrings;
string[] newStrings;
try
{
oldStrings = aDirectory.GetStringArray(tagIdentifier);
}
catch (MetadataException)
{
oldStrings = null;
}
if (oldStrings == null)
{
newStrings = new String[1];
}
else
{
newStrings = new string[oldStrings.Length + 1];
for (int i = 0; i < oldStrings.Length; i++)
{
newStrings[i] = oldStrings[i];
}
}
newStrings[newStrings.Length - 1] = str;
aDirectory.SetObject(tagIdentifier, newStrings);
}
else
{
aDirectory.SetObject(tagIdentifier, str);
}
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a directory</param>
public AbstractTagDescriptor(AbstractDirectory aDirectory) : base()
{
this.directory = aDirectory;
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public NikonType1Descriptor(AbstractDirectory aDirectory) : base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public FujifilmDescriptor(AbstractDirectory aDirectory) : base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a directory</param>
public AbstractTagDescriptor(AbstractDirectory aDirectory)
: base()
{
this.directory = aDirectory;
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aTagType">the type of this tag</param>
/// <param name="aDirectory">the directory of this tag</param>
public Tag(int aTagType, AbstractDirectory aDirectory) : base()
{
this.tagType = aTagType;
this.directory = aDirectory;
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public GpsDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Creates a directory tag.
///
/// Examples :
/// <pre>
/// <directory name="Exif">
/// <tag>
/// ...
/// </tag>
/// <tag>
/// ...
/// </tag>
/// </directory>
/// </pre>
/// </summary>
/// <param name="aBuff">where to put info</param>
/// <param name="aDirectory">the information to add</param>
protected virtual void CreateDirectory(StringBuilder aBuff, AbstractDirectory aDirectory)
{
if (aDirectory != null)
{
Open(aBuff, "directory name=\"" + aDirectory.GetName() + "\"", true);
IEnumerator<Tag> lcTagsEnum = aDirectory.GetTagIterator();
while (lcTagsEnum.MoveNext())
{
Tag lcTag = lcTagsEnum.Current;
CreateTag(aBuff, lcTag);
lcTag = null;
}
Close(aBuff, "directory", true);
}
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public IptcDescriptor(AbstractDirectory aDirectory) : base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="directory">a directory</param>
public SonyDescriptor(AbstractDirectory directory)
: base(directory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a directory</param>
public CanonDescriptor(AbstractDirectory aDirectory) : base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aTagType">the type of this tag</param>
/// <param name="aDirectory">the directory of this tag</param>
public Tag(int aTagType, AbstractDirectory aDirectory) : base()
{
this.tagType = aTagType;
this.directory = aDirectory;
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="directory">a directory</param>
public KodakDescriptor(AbstractDirectory directory)
: base(directory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="directory">a directory</param>
public ExifDescriptor(AbstractDirectory directory)
: base(directory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="aDirectory">a base.directory</param>
public OlympusDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
/// <summary>
/// Constructor of the object
/// </summary>
/// <param name="base.directory">a base.directory</param>
public PentaxDescriptor(AbstractDirectory aDirectory)
: base(aDirectory)
{
}
