/// <summary>
/// MPヘッダを読みだす
/// </summary>
/// <param name="buffer"></param>
/// <param name="o">オフセット</param>
/// <returns></returns>
private MPHeader DecodeMPHeader(byte[] buffer, int o)
{
Endian endian = GetEndian(buffer, o);
uint firstIFDOffset = BitConverterEx.ToUInt32(buffer, o + 4, endian);
return(new MPHeader(endian, firstIFDOffset));
}
public MPEntryValue(byte[] bytes, int startIndex, Endian endian)
{
ImageAttr = (uint)BitConverterEx.ToInt32(bytes, startIndex + 0, endian);
ImageSize = (uint)BitConverterEx.ToInt32(bytes, startIndex + 4, endian);
ImageDataOffset = (uint)BitConverterEx.ToInt32(bytes, startIndex + 8, endian);
DependentImage1 = (ushort)BitConverterEx.ToInt16(bytes, startIndex + 12, endian);
DependentImage2 = (ushort)BitConverterEx.ToInt16(bytes, startIndex + 14, endian);
}
/// <summary>
/// MP個別情報IFDの読み出し
/// </summary>
/// <param name="buffer"></param>
/// <param name="o">オフセット</param>
/// <param name="offsetStart">オフセット基準位置</param>
/// <param name="endian"></param>
/// <returns></returns>
private MPIndividualAttributesIFD DecodeMPIndAttrIFD(byte[] buffer, int o, int offsetStart, Endian endian)
{
// バイト列からIFDのフィールド個数を読み込み
MPIndividualAttributesIFD indAttr = new MPIndividualAttributesIFD
{
Count = BitConverterEx.ToUInt16(buffer, o + 0, endian),
};
// count個分フィールドを読み込み、Tagの値に従って適当なプロパティに設定
for (int i = 0; i < indAttr.Count; i++)
{
int offset = o + 2 * (12 * i);
IFD ifd = new IFD(buffer, o + 2 + (12 * i), offsetStart, endian);
switch (ifd.Tag)
{
case 45056: indAttr.MPFVersion = ifd; break;
case 45313: indAttr.MPIndividualNum = ifd; break;
case 45569: indAttr.PanOrientation = ifd; break;
case 45570: indAttr.PanOverlap_H = ifd; break;
case 45571: indAttr.PanOverlap_V = ifd; break;
case 45572: indAttr.BaseViewpointNum = ifd; break;
case 45573: indAttr.ConvergenceAngle = ifd; break;
case 45574: indAttr.BaselineLength = ifd; break;
case 45575: indAttr.VerticalDivergence = ifd; break;
case 45576: indAttr.AxisDistance_X = ifd; break;
case 45577: indAttr.AxisDistance_Y = ifd; break;
case 45578: indAttr.AxisDistance_Z = ifd; break;
case 45579: indAttr.YawAngle = ifd; break;
case 45580: indAttr.PitchAngle = ifd; break;
case 45581: indAttr.RollAngle = ifd; break;
default:
throw new Exception(string.Format("無効なMP個別情報IFDのTag({0})です", ifd.Tag));
}
}
// 普通は0
indAttr.NextIFDOffset = BitConverterEx.ToUInt32(this.buffer, o + 2 + (12 * indAttr.Count), endian);
return(indAttr);
}
/// <summary>
/// MPインデックスIFDの読み出し
/// </summary>
/// <param name="buffer"></param>
/// <param name="o">オフセット</param>
/// <param name="endian"></param>
/// <returns></returns>
private MPIndexIFD DecodeMPIndexIFD(byte[] buffer, int o, int offsetStart, Endian endian)
{
// バイト列から読み込み
MPIndexIFD index = new MPIndexIFD
{
Count = BitConverterEx.ToUInt16(buffer, o, endian),
MPFVersion = new IFD(buffer, o + 2, offsetStart, endian),
NumberOfImages = new IFD(buffer, o + 14, offsetStart, endian),
MPEntry = new IFD(buffer, o + 26, offsetStart, endian),
};
// タグ番号をチェック
if (index.MPFVersion.Tag != 45056)
{
throw new Exception("MPFVersionのデコードに失敗しました");
}
if (index.NumberOfImages.Tag != 45057)
{
throw new Exception("NumberOfImagesのデコードに失敗しました");
}
if (index.MPEntry.Tag != 45058)
{
throw new Exception("MPEntryのデコードに失敗しました");
}
// 個別画像ユニークIDリスト以下は省略されて存在しないかもしれない
if (index.Count > 3)
{
index.ImageUIDList = new IFD(buffer, o + 38, offsetStart, endian);
index.TotalFrames = new IFD(this.buffer, o + 50, offsetStart, endian);
index.NextIFDOffset = BitConverterEx.ToUInt32(buffer, o + 62, endian);
}
else if (index.Count == 3)
{
index.ImageUIDList = null;
index.TotalFrames = null;
index.NextIFDOffset = BitConverterEx.ToUInt32(buffer, o + 38, endian);
}
else
{
throw new InvalidOperationException("MPインデックスIFDの解析に失敗しました");
}
return(index);
}
public IFD(byte[] bytes, int o, int offsetStart, Endian endian)
{
Tag = (ushort)BitConverterEx.ToInt16(bytes, o + 0, endian);
Type = (IFDType)BitConverterEx.ToInt16(bytes, o + 2, endian);
Count = (uint)BitConverterEx.ToInt32(bytes, o + 4, endian);
Offset = new byte[4];
Array.Copy(bytes, o + 8, Offset, 0, Offset.Length);
if (BitConverter.IsLittleEndian ^ endian == Endian.Little)
{
Array.Reverse(Offset);
}
// 長さが4バイトを超えるときは、Valueをオフセットとして扱う
int typeSize = GetSizeOf(Type);
if (typeSize * Count > 4)
{
Value = new byte[typeSize * Count];
Array.Copy(bytes, offsetStart + OffsetUInt32, Value, 0, Value.Length);
}
//Value = (uint)BitConverterEx.ToInt32(bytes, startIndex + 8, endian);
}
/// <summary>
/// バイト配列内の指定位置にあるバイト列から構造体に変換する
/// </summary>
/// <param name="value">バイト配列</param>
/// <param name="startIndex">value 内の開始位置</param>
/// <param name="endian">エンディアン</param>
/// <returns></returns>
public static object ToStruct(byte[] value, int startIndex, Endian endian, Type type)
{
if (!type.IsValueType)
{
throw new ArgumentException();
}
// プリミティブ型は専用メソッドへ飛ばす
TypeCode code = Type.GetTypeCode(type);
switch (code)
{
case TypeCode.Boolean:
return(ToBoolean(value, startIndex, endian));
case TypeCode.Byte:
return(value[startIndex]);
case TypeCode.Char:
return(ToChar(value, startIndex, endian));
case TypeCode.Double:
return(ToDouble(value, startIndex, endian));
case TypeCode.Int16:
return(ToInt16(value, startIndex, endian));
case TypeCode.Int32:
return(ToInt32(value, startIndex, endian));
case TypeCode.Int64:
return(ToInt64(value, startIndex, endian));
case TypeCode.SByte:
return(value[startIndex]);
case TypeCode.Single:
return(ToSingle(value, startIndex, endian));
case TypeCode.UInt16:
return(ToUInt16(value, startIndex, endian));
case TypeCode.UInt32:
return(ToUInt32(value, startIndex, endian));
case TypeCode.UInt64:
return(ToUInt64(value, startIndex, endian));
default:
break; // 多分その他のstructなので以下処理する
}
// 構造体の全フィールドを取得
FieldInfo[] fields = type.GetFields(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
// 型情報から新規インスタンスを生成 (返却値)
object obj = Activator.CreateInstance(type);
int offset = 0;
foreach (FieldInfo info in fields)
{
// フィールドの値をバイト列から1つ取得し、objの同じフィールドに設定
Type fieldType = info.FieldType;
if (!fieldType.IsValueType)
{
throw new InvalidOperationException();
}
object fieldValue = BitConverterEx.ToStruct(value, startIndex + offset, endian, fieldType);
info.SetValue(obj, fieldValue);
// 次のフィールド値を見るためフィールドのバイトサイズ分進める
offset += Marshal.SizeOf(fieldType);
}
return(obj);
}
