/// <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));
}
/// <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);
}