/// <summary>
/// RSブロックのデータコード語数を返します。
/// </summary>
/// <param name="ecLevel">誤り訂正レベル</param>
/// <param name="version">型番</param>
/// <param name="preceding">RSブロック前半部分は true を指定します。</param>
public static int GetNumberDataCodewords(
ErrorCorrectionLevel ecLevel, int version, bool preceding)
{
int numDataCodewords = DataCodeword.GetTotalNumber(ecLevel, version);
int numRSBlocks = _totalNumbers[(int)ecLevel][version];
int numPreBlockCodewords = numDataCodewords / numRSBlocks;
if (preceding)
{
return(numPreBlockCodewords);
}
else
{
int numPreBlocks = GetTotalNumber(ecLevel, version, true);
int numFolBlocks = GetTotalNumber(ecLevel, version, false);
if (numFolBlocks > 0)
{
return((numDataCodewords - numPreBlockCodewords * numPreBlocks) / numFolBlocks);
}
else
{
return(0);
}
}
}
/// <summary>
/// RSブロックの誤り訂正コード語数を返します。
/// </summary>
/// <param name="ecLevel">誤り訂正レベル</param>
/// <param name="version">型番</param>
public static int GetNumberECCodewords(
ErrorCorrectionLevel ecLevel, int version)
{
int numDataCodewords = DataCodeword.GetTotalNumber(ecLevel, version);
int numRSBlocks = _totalNumbers[(int)ecLevel][version];
return((Codeword.GetTotalNumber(version) / numRSBlocks) -
(numDataCodewords / numRSBlocks));
}
/// <summary>
/// RSブロック数を返します。
/// </summary>
/// <param name="ecLevel">誤り訂正レベル</param>
/// <param name="version">型番</param>
/// <param name="preceding">RSブロック前半部分は true を指定します。</param>
public static int GetTotalNumber(
ErrorCorrectionLevel ecLevel, int version, bool preceding)
{
int numDataCodewords = DataCodeword.GetTotalNumber(ecLevel, version);
int numRSBlocks = _totalNumbers[(int)ecLevel][version];
int numFolBlocks = numDataCodewords % numRSBlocks;
if (preceding)
{
return(numRSBlocks - numFolBlocks);
}
else
{
return(numFolBlocks);
}
}
