CSJ2K.j2k.codestream.reader.HeaderDecoder.readSIZ C# (CSharp) Method

        private void readSIZ(System.IO.BinaryReader ehs)
        {
            HeaderInfo.SIZ ms = hi.NewSIZ;
            hi.sizValue = ms;

            // Read the length of SIZ marker segment (Lsiz)
            ms.lsiz = ehs.ReadUInt16();

            // Read the capability of the codestream (Rsiz)
            ms.rsiz = ehs.ReadUInt16();
            if (ms.rsiz > 2)
            {
                throw new System.InvalidOperationException("Codestream capabiities not JPEG 2000 - Part I" + " compliant");
            }

            // Read image size
            ms.xsiz = ehs.ReadInt32();
            ms.ysiz = ehs.ReadInt32();
            if (ms.xsiz <= 0 || ms.ysiz <= 0)
            {
                throw new System.IO.IOException("JJ2000 does not support images whose " + "width and/or height not in the " + "range: 1 -- (2^31)-1");
            }

            // Read image offset
            ms.x0siz = ehs.ReadInt32();
            ms.y0siz = ehs.ReadInt32();
            if (ms.x0siz < 0 || ms.y0siz < 0)
            {
                throw new System.IO.IOException("JJ2000 does not support images offset " + "not in the range: 0 -- (2^31)-1");
            }

            // Read size of tile
            ms.xtsiz = ehs.ReadInt32();
            ms.ytsiz = ehs.ReadInt32();
            if (ms.xtsiz <= 0 || ms.ytsiz <= 0)
            {
                throw new System.IO.IOException("JJ2000 does not support tiles whose " + "width and/or height are not in  " + "the range: 1 -- (2^31)-1");
            }

            // Read upper-left tile offset
            ms.xt0siz = ehs.ReadInt32();
            ms.yt0siz = ehs.ReadInt32();
            if (ms.xt0siz < 0 || ms.yt0siz < 0)
            {
                throw new System.IO.IOException("JJ2000 does not support tiles whose " + "offset is not in  " + "the range: 0 -- (2^31)-1");
            }

            // Read number of components and initialize related arrays
            nComp = ms.csiz = ehs.ReadUInt16();
            if (nComp < 1 || nComp > 16384)
            {
                throw new System.ArgumentException("Number of component out of " + "range 1--16384: " + nComp);
            }

            ms.ssiz = new int[nComp];
            ms.xrsiz = new int[nComp];
            ms.yrsiz = new int[nComp];

            // Read bit-depth and down-sampling factors of each component
            for (int i = 0; i < nComp; i++)
            {
                ms.ssiz[i] = ehs.ReadByte();
                ms.xrsiz[i] = ehs.ReadByte();
                ms.yrsiz[i] = ehs.ReadByte();
            }

            // Check marker length
            checkMarkerLength(ehs, "SIZ marker");

            // Create needed ModuleSpec
            nTiles = ms.NumTiles;

            // Finish initialization of decSpec
            decSpec = new DecoderSpecs(nTiles, nComp);
        }