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#include "TH1.h"
#include "TH2.h"
#include "TGraph.h"
#include "TCanvas.h"
#include "TStyle.h"
#include "TLegend.h"
//#include "TROOT.h"

#include <stdio.h>
#include <time.h>

#define DATA_PATH  "./data/"
#define CFRAC 0.4
#define DWIDTH 1024
#define NCH 4
#include "drs.h"

ClassImp (drs)

drs::drs( const char *FileName, int nch, DrsChannel* d, int trgch, int nev, int updfrq)
{
        int debug=0;
        int i,ich,iev;
        int stat;
        char histname[128];
//  char FileName[300]="./data/n2.dat";
        FILE *fin;

        char recid[5]="SAMO";
        unsigned short *srecid = (unsigned short *) &recid[0];

        struct evrec {
                unsigned long evn;
                unsigned short tYear,tMonth,tDay,tHour,tMin,tSec,tmSec,rc;
        } evrec;

        float dtdata[NCH][DWIDTH];
        float tcdata[NCH][DWIDTH];
        float tccalib[NCH];
        float scaler[NCH];
        float *t;
        float *y;
        float *ay;

        short lwfm[NCH];
        int nwfm[NCH];
        int board;
        int version;


        unsigned short ichdat[NCH][DWIDTH];
        float chdat[NCH][DWIDTH];
        float achdat[NCH][DWIDTH];
        float chmax[NCH][2];
        float chmin[NCH][2];
        float letime[NCH],cftime[NCH],qdc[NCH];


//  gROOT->Reset();

        gStyle->SetOptStat(1111111);
//  gStyle->SetPalette(52);

        TH1F *h1_chmax[NCH];
        TH1F *h1_chmaxt[NCH];
        TH1F *h1_chmin[NCH];
        TH1F *h1_chmint[NCH];
        TH1F *h1_letime[NCH];
        TH1F *h1_cftime[NCH];
        TH1F *h1_cftdif[NCH];
        TH1F *h1_qdc[NCH];
        TH2F *h2_dpo[NCH];
        TH2F *h2_tdcadc[NCH];
        TH2F *h2_ctdcadc[NCH];
        TH2F *h2_ctalk;
        TGraph *gr_wfm[NCH];
        TCanvas *c_wfm= new TCanvas("c_wfm","WFM",50,50,700,700);
        TLegend *leg = new TLegend(0.8, 0.8, 1, 1);
        c_wfm->Divide(1,1);
        c_wfm->cd(1);

        for (i=0; i<nch; i++) {
                sprintf(histname,"chmax_%02d",i);
                h1_chmax[i]=new TH1F(histname,histname,1100,-0.55,0.55);
                sprintf(histname,"chmaxt_%02d",i);
                h1_chmaxt[i]=new TH1F(histname,histname,DWIDTH,-0.1,204.7);
                sprintf(histname,"chmin_%02d",i);
                h1_chmin[i]=new TH1F(histname,histname,1100,-0.55,0.55);
                sprintf(histname,"chmint_%02d",i);
                h1_chmint[i]=new TH1F(histname,histname,DWIDTH,-0.1,204.7);
                sprintf(histname,"letime_%02d",i);
                h1_letime[i]=new TH1F(histname,histname,500,d[i].twin[0],d[i].twin[1]);
                sprintf(histname,"cftime_%02d",i);
                h1_cftime[i]=new TH1F(histname,histname,500,d[i].twin[0],d[i].twin[1]);
                sprintf(histname,"cftdif_%02d",i);
                h1_cftdif[i]=new TH1F(histname,histname,2000,d[i].twin[0]-d[trgch].twin[0],d[i].twin[1]-d[trgch].twin[0]);
                sprintf(histname,"qdc_%02d",i);
                h1_qdc[i]=new TH1F(histname,histname,500,-0.5,4.5);
                sprintf(histname,"dpo_%02d",i);
                h2_dpo[i]=new TH2F(histname,histname,DWIDTH,-0.1,204.7,1100,-0.55,0.55);
                sprintf(histname,"tdcadc_%02d",i);
                h2_tdcadc[i]=new TH2F(histname,histname,250,-0.1,0.5,400,d[i].twin[0]-d[trgch].twin[0],d[i].twin[1]-d[trgch].twin[0]);
                sprintf(histname,"ctdcadc_%02d",i);
                h2_ctdcadc[i]=new TH2F(histname,histname,250,-0.1,0.5,400,d[i].twin[0]-d[trgch].twin[0],d[i].twin[1]-d[trgch].twin[0]);
                gr_wfm[i]=new TGraph(DWIDTH);
                gr_wfm[i]->SetMinimum(-0.55);
                gr_wfm[i]->SetMaximum(0.55);
                gr_wfm[i]->SetLineColor(i+1);
                gr_wfm[i]->SetMarkerColor(i+1);
                sprintf(histname,"ch %d",i);
                leg->AddEntry(gr_wfm[i], histname, "l");
                if (i) gr_wfm[i]->Draw("LP"); else gr_wfm[i]->Draw("ALP");
                gr_wfm[i]->GetHistogram()->SetTitle("WaveForms");
        }

        leg->Draw();
        h2_ctalk=new TH2F("ctalk","ctalk",250,0.,0.5,250,0.,0.5);

        fin=fopen(FileName,"rb");
        if (fin==NULL) {
                printf("Error opening file %s\n",FileName);
                return;
        }
        printf("%s, %lu\n",recid,sizeof(evrec));


        for (ich=0; ich<nch; ich++) {
                nwfm[ich]=0;
                for (i=0; i<DWIDTH; i++) {
                        achdat[ich][i]=0;
                }
        }
        unsigned int trgcell = 0;
        int event = -1;

        iev=0;
        time_t t0,told;
        time(&t0);
        told=t0-1;
        while(!feof(fin)) {
                if (iev>=nev) break;
                stat=fread(recid,1,4,fin);
                if (debug) {
                        if (recid[1]=='#') printf("%c%c%u\n",recid[0],recid[1],srecid[1]);
                        else printf("%s\n",recid );
                }
                switch (recid[0]) {
                case 'D': // DRS
                        version = atoi(&recid[3]);
                        break;
                case 'T': // TIME
                        switch (recid[1]) {
                        case 'I':
                                event=0;
                                if (version ==0) version++;
                                break;
                        case '#': trgcell = srecid[1]; break;
                        }
                        break;
                case 'B':
                        board = srecid[1];
                        break;
                case 'C':
                        sscanf(recid,"C%d",&ich);
                        ich=ich-1;
                        if (event) {
                                if (version>1) stat=fread(&scaler[ich],1,sizeof(float),fin);
                                stat=fread(ichdat[ich],1,sizeof(ichdat[ich]),fin);
                        } else {

                                stat=fread(dtdata[ich],1,sizeof(float)*DWIDTH,fin);

                        }
                        break;
                case 'E':
                        stat=fread(&evrec.evn,1,sizeof(evrec),fin);
                        iev++;
                        if (!version)  {
                                stat=fread(dtdata[0],1,sizeof(float)*DWIDTH,fin);
                        }
                        event=1;
                        break;
                default:
                        printf("Unknown header! %s\n", recid);
                        break;
                }


                if (recid[0] == 'E') {
                        for ( i=0; i<nch; i++) {
                                if (!lwfm[i]) continue;
                                                                double pulseheight =  (d[i].edge)? chmax[i][0]: chmin[i][0];
                                                                        
                                                                if ((pulseheight >d[i].vcut[0])&&
                                                                    (pulseheight <d[i].vcut[1]) ) { 
                                                                    
                                        h1_cftdif[i]->Fill(cftime[i]-cftime[trgch]);
                                }
                                if (!d[i].edge) pulseheight = - pulseheight; 
                                h2_tdcadc[i] ->Fill(pulseheight,letime[i]-cftime[trgch]);
                                h2_ctdcadc[i]->Fill(pulseheight,cftime[i]-cftime[trgch]);
                                                                
                                                                //if (i==1) printf("ph=%f %f\n", pulseheight, letime[i]-cftime[trgch]);
                        }
                                                double ph0 =  (d[0].edge)? chmax[0][0]: -chmin[0][0];
                                                double ph1 =  (d[1].edge)? chmax[1][0]: -chmin[1][0];
                        h2_ctalk->Fill(ph0,ph1);
                }
                if (event<1) continue;
                if (recid[0]!='C') continue;
                if (ich>=nch) continue;

                lwfm[ich]=0;
                qdc[ich]=0;
                chmax[ich][0]=-1; chmax[ich][1]=-1;
                chmin[ich][0]=1; chmin[ich][1]=-1;
                letime[ich]=-1.; letime[ich]=-1.;
                cftime[ich]=-1.; cftime[ich]=-1.;


                lwfm[ich]=1;
                nwfm[ich]+=1;



                t  = &tcdata[ich][0];
                y  = &chdat[ich][0];
                ay = &achdat[ich][0];

                float sum=0;
                for (i=0; i<DWIDTH; i++) {
                        sum+= dtdata[ich][(i+trgcell)%DWIDTH];
                        if (version) t[i]=sum;
                        else t[i]=dtdata[0][i]; // old format
                }
                tccalib[ich]=t[(DWIDTH-trgcell)%DWIDTH];

                for (i=0; i<DWIDTH; i++) {
                        if (version) t[i]-=(tccalib[ich]-tccalib[0]); // assume ich 0 is connected and always first in the data
                        y[i]=-0.5+(float)ichdat[ich][i]/0xFFFF;
                        if (version) y[i]+=evrec.rc;
                        h2_dpo[ich]->Fill(t[i],y[i]);
                        gr_wfm[ich]->SetPoint(i,t[i],y[i]+0.05*(ich-1));
                }


                for (i=0; i<DWIDTH; i++) {
                        // accumulated waveforms
                        ay[i]+=y[i];

                        // signal minumum
                        if (y[i]>chmax[ich][0]) {
                                chmax[ich][0]=y[i];
                                chmax[ich][1]=t[i];
                        }

                        // signal maximum
                        if (y[i]<chmin[ich][0]) {
                                chmin[ich][0]=y[i];
                                chmin[ich][1]=t[i];
                        }
                        float t0  = t[i];
                        float t0p = t[i+1];
                        float t0n = t[i-1];
                        // charge in the range
                        if ((t0>d[ich].adcgate[0])&&(t0<d[ich].adcgate[1])) {
                                float sign =  (d[ich].edge)? 1: -1;
                                                                qdc[ich]+=sign*y[i]*(t0p-t0n)/2.;
                        }
                }

                for (i=1; i<DWIDTH-1; i++) {
                        float t0  = t[i];
                        float t0p = t[i+1];
                        float t0n = t[i-1];
                        // leading edge in the range
                        if ((t0>d[ich].twin[0])&&(t0<d[ich].twin[1])) {
                                if ( ((!d[ich].edge)&&(y[i]<d[ich].threshold) ||
                                      ( d[ich].edge)&&(y[i]>d[ich].threshold ) )
                                     &&(letime[ich]<0.)) {
                                        letime[ich]=t0n+(t0-t0n)*(d[ich].threshold-y[i-1])/(y[i]-y[i-1]);
                                }
                                // constant fraction time in the range
                                if ( ( ((!d[ich].edge) && (chmin[ich][0]<d[ich].threshold)&&(y[i]<chmin[ich][0]*d[ich].cfrac)) ||
                                       (( d[ich].edge) && (chmax[ich][0]>d[ich].threshold)&&(y[i]>chmax[ich][0]*d[ich].cfrac)) )
                                     &&(cftime[ich]<0.)

                                     ) {
                                        cftime[ich]=t0n+(t0-t0n)*(chmin[ich][0]*d[ich].cfrac-y[i-1])/(y[i]-y[i-1]);
                                }
                        }
                }

                if ((chmax[ich][1]>d[ich].twin[0])&&(chmax[ich][1]<d[ich].twin[1])) {
                        h1_chmax[ich]->Fill(chmax[ich][0]);
                        if (chmax[ich][0]>d[ich].threshold) h1_chmaxt[ich]->Fill(chmax[ich][1]);
                }
                if ((chmin[ich][1]>d[ich].twin[0])&&(chmin[ich][1]<d[ich].twin[1])) {
                        h1_chmin[ich]->Fill(chmin[ich][0]);
                        if (chmin[ich][0]<d[ich].threshold) h1_chmint[ich]->Fill(chmin[ich][1]);
                }
                h1_qdc[ich]->Fill(qdc[ich]);
                h1_letime[ich]->Fill(letime[ich]);
                h1_cftime[ich]->Fill(cftime[ich]);
                time(&t0);

                if ((t0!=told) || ((updfrq>0)&&(!(iev%updfrq) ) ) ) {
                        c_wfm->Update();
                        for (i=0; i<DWIDTH; i++) {
                                ay[i]/=nwfm[ich];
                                gr_wfm[ich]->SetPoint(i,t[i],ay[i]+0.00*(ich-1));
                        }
                        printf("processing event %d\n",iev);
                        told=t0;
                }
        }

        printf("number of events: %d\n",iev);
        fclose(fin);

        TCanvas* c_dpo= new TCanvas("c_dpo","DPO",750,50,700,700);
        c_dpo->Divide(2,2);
        for (i=0; i<nch; i++) {c_dpo->cd(i+1); h2_dpo[i]->Draw("colz");}

        TCanvas* c_cftdif= new TCanvas("c_cftdif","DPO",750,50,700,700);
        c_cftdif->Divide(2,2);
        for (i=0; i<nch; i++) {c_cftdif->cd(i+1); h1_cftdif[i]->Draw();}
        return;
}


void drsana(int nev=1000, int updfrq=20, char *FileName="./data/x1.dat", int trgch=0){

//  float threshold[nch][2]={{0.,-0.02},{0.,0.},{0.,0.},{0.,-0.25}};
//  float twin[nch][2]={{120.,130.},{100.,150.},{100.,150.},{70.,90.}};
//  float adcgate[nch][2]={{12nch.,136.},{120.,140.},{120.,140.},{70.,90.}};
//  float threshold[4][2]={{0.,-0.05},{0.,-0.05},{0.,-0.25},{0.,-0.25}};
//  float twin[4][2]={{80.,100.},{80.,100.},{90.,110.},{50.,70.}};
//  float adcgate[4][2]={{80.,110.},{80.,110.},{90.,110.},{50.,70.}};
        double threshold[4][2]={{0.,-0.05},{0.,-0.05},{0.,-0.25},{0.,-0.25}};
        float twin[4][2]={{100.,120.},{100.,120.},{110.,130.},{60.,80.}};
        float adcgate[4][2]={{105.,125.},{105.,125.},{110.,130.},{60.,80.}};
        double vcut[4][2]={{-0.49,-0.07},{-1,1},{-1,1},{-1,1}};
        int edge[4]={1,1,1,1};// 0 -- rising, 1 -- falling

        DrsChannel c[2];

        c[0].cfrac = CFRAC;
        c[0].threshold = threshold[0][0];
        c[0].twin[0] = twin[0][0];
        c[0].twin[1] = twin[0][1];

        c[0].adcgate[0] = adcgate[0][0];
        c[0].adcgate[1] = adcgate[0][1];

        c[0].vcut[0] = vcut[0][0];
        c[0].vcut[1] = vcut[0][1];

        c[0].edge = edge[0];


        c[1].cfrac = CFRAC;
        c[1].threshold = threshold[1][0];
        c[1].twin[0] = twin[1][0];
        c[1].twin[1] = twin[1][1];

        c[1].adcgate[0] = adcgate[1][0];
        c[1].adcgate[1] = adcgate[1][1];

        c[1].vcut[0] = vcut[1][0];
        c[1].vcut[1] = vcut[1][1];

        c[1].edge = edge[1];
        drs * d = new drs(FileName, 2, c, trgch, nev, updfrq );
}