csogg.Page.granulepos C# (CSharp) Method

        public long granulepos()
        {
            long foo = header_base[header+13]&0xff;
            foo = (foo<<8) | (uint)(header_base[header+12]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+11]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+10]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+9]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+8]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+7]&0xff);
            foo = (foo<<8) | (uint)(header_base[header+6]&0xff);
            return(foo);
        }

        // add the incoming page to the stream state; we decompose the page
        // into packet segments here as well.
        public int pagein(Page og)
        {
            byte[] header_base=og.header_base;
            int header=og.header;
            byte[] body_base=og.body_base;
            int body=og.body;
            int bodysize=og.body_len;
            int segptr=0;

            int version=og.version();
            int continued=og.continued();
            int bos=og.bos();
            int eos=og.eos();
            long granulepos=og.granulepos();
            int _serialno=og.serialno();
            int _pageno=og.pageno();
            int segments=header_base[header+26]&0xff;

            // clean up 'returned data'
            {
            int lr=lacing_returned;
            int br=body_returned;

            // body data

            //System.out.println("br="+br+", body_fill="+body_fill);

            if(br!=0)
            {
                body_fill-=br;
                if(body_fill!=0)
                {
                    Array.Copy(body_data, br, body_data, 0, body_fill);
                }
                body_returned=0;
            }

            //System.out.println("?? br="+br+", body_fill="+body_fill+" body_returned="+body_returned);

            if(lr!=0)
            {
                // segment table
                if((lacing_fill-lr)!=0)
                {
                    Array.Copy(lacing_vals, lr, lacing_vals, 0, lacing_fill-lr);
                    Array.Copy(granule_vals, lr, granule_vals, 0, lacing_fill-lr);
                }
                lacing_fill-=lr;
                lacing_packet-=lr;
                lacing_returned=0;
            }
            }

            // check the serial number
            if(_serialno!=serialno)return(-1);
            if(version>0)return(-1);

            lacing_expand(segments+1);

            // are we in sequence?
            if(_pageno!=pageno)
            {
                int i;

                // unroll previous partial packet (if any)
                for(i=lacing_packet;i<lacing_fill;i++)
                {
                    body_fill-=lacing_vals[i]&0xff;
                    //System.out.println("??");
                }
                lacing_fill=lacing_packet;

                // make a note of dropped data in segment table
                if(pageno!=-1)
                {
                    lacing_vals[lacing_fill++]=0x400;
                    lacing_packet++;
                }

                // are we a 'continued packet' page?  If so, we'll need to skip
                // some segments
                if(continued!=0)
                {
                    bos=0;
                    for(;segptr<segments;segptr++)
                    {
                        int val=(header_base[header+27+segptr]&0xff);
                        body+=val;
                        bodysize-=val;
                        if(val<255)
                        {
                            segptr++;
                            break;
                        }
                    }
                }
            }

            //System.out.println("bodysize="+bodysize);

            if(bodysize!=0)
            {
                body_expand(bodysize);
                Array.Copy(body_base, body, body_data, body_fill, bodysize);
                body_fill+=bodysize;
            }

            //System.out.println("bodyfill="+body_fill);

            {
            int saved=-1;
            while(segptr<segments)
            {
                int val=(header_base[header+27+segptr]&0xff);
                lacing_vals[lacing_fill]=val;
                granule_vals[lacing_fill]=-1;

                if(bos!=0)
                {
                    lacing_vals[lacing_fill]|=0x100;
                    bos=0;
                }

                if(val<255)saved=lacing_fill;

                lacing_fill++;
                segptr++;

                if(val<255)lacing_packet=lacing_fill;
            }

            /* set the granulepos on the last pcmval of the last full packet */
            if(saved!=-1)
            {
                granule_vals[saved]=granulepos;
            }
            }

            if(eos!=0)
            {
                e_o_s=1;
                if(lacing_fill>0)
                    lacing_vals[lacing_fill-1]|=0x200;
            }

            pageno=_pageno+1;
            return(0);
        }