public void parseData() { if (stream.Length < 16) { throw new TiffParserException("Not a TIFF file (size too small)"); } Endianness endian = Endianness.little; byte[] data = new byte[5]; stream.Position = 0; stream.Read(data, 0, 4); if (data[0] == 0x4D || data[1] == 0x4D) { //open binaryreader reader = new TIFFBinaryReaderRE(stream); endian = Endianness.big; if (data[3] != 42 && data[2] != 0x4f) // ORF sometimes has 0x4f, Lovely! { throw new TiffParserException("Not a TIFF file (magic 42)"); } } else if (data[0] == 0x49 || data[1] == 0x49) { reader = new TIFFBinaryReader(stream); if (data[2] != 42 && data[2] != 0x52 && data[2] != 0x55) // ORF has 0x52, RW2 0x55 - Brillant! { throw new TiffParserException("Not a TIFF file (magic 42)"); } } else { throw new TiffParserException("Not a TIFF file (ID)"); } UInt32 nextIFD; reader.Position = 4; nextIFD = reader.ReadUInt32(); rootIFD = new IFD(reader, nextIFD, endian, 0); nextIFD = rootIFD.nextOffset; while (nextIFD != 0) { rootIFD.subIFD.Add(new IFD(reader, nextIFD, endian, 0)); if (rootIFD.subIFD.Count > 100) { throw new TiffParserException("TIFF file has too many SubIFDs, probably broken"); } nextIFD = (rootIFD.subIFD[rootIFD.subIFD.Count - 1]).nextOffset; } }
public IFD(TIFFBinaryReader fileStream, uint offset, Endianness endian) { this.endian = endian; fileStream.Position = offset; tagNumber = fileStream.ReadUInt16(); tags = new Dictionary <TagType, Tag>(); for (int i = 0; i < tagNumber; i++) { Tag temp = new Tag(); temp.tagId = (TagType)fileStream.ReadUInt16(); //add the displayname temp.displayName = null; temp.dataType = (TiffDataType)fileStream.ReadUInt16(); temp.dataCount = fileStream.ReadUInt32(); //IF makernote, do not parse data //if (temp.tagId == TagType.MAKERNOTE || temp.tagId == TagType.MAKERNOTE_ALT) temp.dataCount = 0; temp.dataOffset = 0; if (((temp.dataCount * temp.getTypeSize(temp.dataType) > 4))) { temp.dataOffset = fileStream.ReadUInt32(); } //Get the tag data temp.data = new Object[temp.dataCount]; long firstPosition = fileStream.Position; if (temp.dataOffset > 1) { fileStream.Position = temp.dataOffset; //todo check if correct } if (temp.tagId != TagType.MAKERNOTE && temp.tagId != TagType.MAKERNOTE_ALT) { for (int j = 0; j < temp.dataCount; j++) { switch (temp.dataType) { case TiffDataType.BYTE: case TiffDataType.UNDEFINED: case TiffDataType.ASCII: case TiffDataType.OFFSET: temp.data[j] = fileStream.ReadByte(); break; case TiffDataType.SHORT: temp.data[j] = fileStream.ReadUInt16(); break; case TiffDataType.LONG: temp.data[j] = fileStream.ReadUInt32(); break; case TiffDataType.RATIONAL: temp.data[j] = fileStream.ReadDouble(); break; case TiffDataType.SBYTE: temp.data[j] = fileStream.ReadSByte(); break; case TiffDataType.SSHORT: temp.data[j] = fileStream.ReadInt16(); //if (temp.dataOffset == 0 && temp.dataCount == 1) fileStream.ReadInt16(); break; case TiffDataType.SLONG: temp.data[j] = fileStream.ReadInt32(); break; case TiffDataType.SRATIONAL: //Because the nikonmakernote is broken with the tag 0x19 wich is double but offset of zero. //TODO remove this Fix if (temp.dataOffset == 0) { temp.data[j] = .0; } else { temp.data[j] = fileStream.ReadDouble(); } break; case TiffDataType.FLOAT: temp.data[j] = fileStream.ReadSingle(); break; case TiffDataType.DOUBLE: temp.data[j] = fileStream.ReadDouble(); break; } } }//Special tag switch (temp.tagId) { case TagType.DNGPRIVATEDATA: { try { IFD maker_ifd = parseDngPrivateData(temp); if (maker_ifd != null) { subIFD.Add(maker_ifd); } temp.data = null; } catch (TiffParserException) { // Unparsable private data are added as entries } catch (IOException) { // Unparsable private data are added as entries } } break; case TagType.MAKERNOTE: case TagType.MAKERNOTE_ALT: { try { //save current position long pos = fileStream.Position; IFD makernote = parseMakerNote(fileStream, temp.dataOffset, endian); if (makernote != null) { subIFD.Add(makernote); } //correct here fileStream.BaseStream.Position = pos; //return to current position } catch (TiffParserException) { // Unparsable makernotes are added as entries } catch (IOException) { // Unparsable makernotes are added as entries } } break; case TagType.FUJI_RAW_IFD: if (temp.dataType == TiffDataType.OFFSET) // FUJI - correct type { temp.dataType = TiffDataType.LONG; } goto case TagType.SUBIFDS; case TagType.SUBIFDS: case TagType.EXIFIFDPOINTER: case TagType.NIKONTHUMB: long p = fileStream.Position; try { for (Int32 k = 0; k < temp.dataCount; k++) { subIFD.Add(new IFD(fileStream, Convert.ToUInt32(temp.data[k]), endian, depth)); } } catch (TiffParserException) { // Unparsable subifds are added as entries } catch (IOException) { // Unparsable subifds are added as entries } fileStream.BaseStream.Position = p; break; } //transform data ToString if (temp.dataType == TiffDataType.ASCII) { //remove \0 if any if ((byte)temp.data[temp.dataCount - 1] == 0) { temp.data[temp.dataCount - 1] = (byte)' '; } string t = Encoding.ASCII.GetString(temp.data.Cast <byte>().ToArray()); temp.data = new Object[1]; temp.data[0] = t; } if (temp.dataOffset > 1) { fileStream.BaseStream.Position = firstPosition; } else if (temp.dataOffset == 0) { int k = (int)temp.dataCount * temp.getTypeSize(temp.dataType); if (k < 4) { fileStream.ReadBytes(4 - k); } } /*else * { * temp.dataCount = 0; * temp.data = null; * }*/ if (!tags.ContainsKey(temp.tagId)) { tags.Add(temp.tagId, temp); } else { Debug.WriteLine("tags already exist"); } } nextOffset = fileStream.ReadUInt16(); }