/*

SleepLib PRS1 Loader Implementation

Author: Mark Watkins <jedimark64@users.sourceforge.net>
License: GPL
*/

#include <QApplication>
#include <QString>
#include <QDateTime>
#include <QDir>
#include <QFile>
#include <QMessageBox>
#include <QProgressBar>
#include <QDebug>
#include <cmath>
#include "SleepLib/schema.h"
#include "prs1_loader.h"
#include "SleepLib/session.h"
#include "SleepLib/calcs.h"


const int PRS1_MAGIC_NUMBER=2;
const int PRS1_SUMMARY_FILE=1;
const int PRS1_EVENT_FILE=2;
const int PRS1_WAVEFORM_FILE=5;


//********************************************************************************************
/// IMPORTANT!!!
//********************************************************************************************
// Please INCREMENT the prs1_data_version in prs1_loader.h when making changes to this loader
// that change loader behaviour or modify channels.
//********************************************************************************************


extern QProgressBar *qprogress;

QHash<int,QString> ModelMap;

#define PRS1_CRC_CHECK
#ifdef PRS1_CRC_CHECK
typedef quint16 crc_t;

static const crc_t crc_table[256] = {
    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
    0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
    0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
    0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
    0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
    0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
    0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
    0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
    0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
    0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
    0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
    0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
    0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
    0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
    0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
    0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
    0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
    0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
    0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
    0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
    0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
    0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
    0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
    0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
    0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
    0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
    0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
    0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
    0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
    0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
    0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
    0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};

crc_t CRC16(const unsigned char *data, size_t data_len)
{
    crc_t crc=0;
    unsigned int tbl_idx;

    while (data_len--) {
        tbl_idx = (crc ^ *data) & 0xff;
        crc = (crc_table[tbl_idx] ^ (crc >> 8)) & 0xffff;

        data++;
    }
    return crc & 0xffff;
}
#endif

PRS1::PRS1(Profile *p,MachineID id):CPAP(p,id)
{
    m_class=prs1_class_name;
    properties[STR_PROP_Brand]="Philips Respironics";
    properties[STR_PROP_Model]="System One";

}
PRS1::~PRS1()
{

}


/*! \struct WaveHeaderList
    \brief Used in PRS1 Waveform Parsing */
struct WaveHeaderList {
    quint16 interleave;
    quint8  sample_format;
    WaveHeaderList(quint16 i,quint8 f){ interleave=i; sample_format=f; }
};


PRS1Loader::PRS1Loader()
{
    //genCRCTable();
    m_buffer=NULL;
}

PRS1Loader::~PRS1Loader()
{
    for (QHash<QString,Machine *>::iterator i=PRS1List.begin(); i!=PRS1List.end(); i++) {
        delete i.value();
    }
}
Machine *PRS1Loader::CreateMachine(QString serial,Profile *profile)
{
    if (!profile)
        return NULL;
    qDebug() << "Create Machine " << serial;

    QList<Machine *> ml=profile->GetMachines(MT_CPAP);
    bool found=false;
    QList<Machine *>::iterator i;
    for (i=ml.begin(); i!=ml.end(); i++) {
        if (((*i)->GetClass()==STR_MACH_PRS1) && ((*i)->properties[STR_PROP_Serial]==serial)) {
            PRS1List[serial]=*i; //static_cast<CPAP *>(*i);
            found=true;
            break;
        }
    }
    if (found) return *i;

    //assert(PRS1List.find(serial)==PRS1List.end())
    Machine *m=new PRS1(profile,0);

    PRS1List[serial]=m;
    profile->AddMachine(m);

    m->properties[STR_PROP_Serial]=serial;
    m->properties[STR_PROP_Path]="{"+STR_GEN_DataFolder+"}/"+m->GetClass()+"_"+serial+"/";;

    return m;
}
bool isdigit(QChar c)
{
    if ((c>='0') && (c<='9')) return true;
    return false;
}
int PRS1Loader::Open(QString & path,Profile *profile)
{
    QString newpath,pseries="P-Series";
    qDebug() << "PRS1Loader::Open path=" << newpath;
    if (path.endsWith(QDir::separator()+pseries)) {
        newpath=path;
    } else {
        newpath=path+QDir::separator()+pseries;
    }

    QDir dir(newpath);

    if ((!dir.exists() || !dir.isReadable()))
        return 0;

    dir.setFilter(QDir::NoDotAndDotDot | QDir::Dirs | QDir::Files | QDir::Hidden | QDir::NoSymLinks);
    dir.setSorting(QDir::Name);
    QFileInfoList flist=dir.entryInfoList();

    QList<QString> SerialNumbers;
    QList<QString>::iterator sn;

    for (int i=0;i<flist.size();i++) {
        QFileInfo fi=flist.at(i);
        QString filename=fi.fileName();

        if ((filename[0]=='P') && (isdigit(filename[1])) && (isdigit(filename[2]))) {
            SerialNumbers.push_back(filename);
        } else if (filename.toLower()=="last.txt") { // last.txt points to the current serial number
            QString file=fi.canonicalFilePath();
            QFile f(file);
            if (!fi.isReadable()) {
                qDebug() << "PRS1Loader: last.txt exists but I couldn't read it!";
                continue;
            }
            if (!f.open(QIODevice::ReadOnly)) {
                qDebug() << "PRS1Loader: last.txt exists but I couldn't open it!";
                continue;
            }
            last=f.readLine(64);
            last=last.trimmed();
            f.close();
        }
    }

    if (SerialNumbers.empty()) return 0;

    m_buffer=new unsigned char [max_load_buffer_size]; //allocate once and reuse.
    Machine *m;
    for (sn=SerialNumbers.begin(); sn!=SerialNumbers.end(); sn++) {
        QString s=*sn;
        m=CreateMachine(s,profile);
        try {
            if (m) OpenMachine(m,newpath+QDir::separator()+(*sn),profile);
        } catch(OneTypePerDay e) {
            profile->DelMachine(m);
            PRS1List.erase(PRS1List.find(s));
            QMessageBox::warning(NULL,"Import Error","This Machine Record cannot be imported in this profile.\nThe Day records overlap with already existing content.",QMessageBox::Ok);
            delete m;
        }
    }
    delete [] m_buffer;
    return PRS1List.size();
}

bool PRS1Loader::ParseProperties(Machine *m,QString filename)
{
    QFile f(filename);
    if (!f.open(QIODevice::ReadOnly))
        return false;

    QString line;
    QHash<QString,QString> prop;

    QString s=f.readLine();
    QChar sep='=';
    QString key,value;

    while (!f.atEnd()) {
        key=s.section(sep,0,0); //BeforeFirst(sep);
        if (key==s) continue;
        value=s.section(sep,1).trimmed(); //AfterFirst(sep).Strip();
        if (value==s) continue;
        prop[key]=value;
        s=f.readLine();
    }
    bool ok;
    QString pt=prop["ProductType"];
    int i=pt.toInt(&ok,16);
    if (ok) {
        if (ModelMap.find(i)!=ModelMap.end()) {
            m->properties[STR_PROP_SubModel]=ModelMap[i];
        }
    }
    if (prop["SerialNumber"]!=m->properties[STR_PROP_Serial]) {
        qDebug() << "Serial Number in PRS1 properties.txt doesn't match directory structure";
    } else prop.erase(prop.find("SerialNumber")); // already got it stored.

    for (QHash<QString,QString>::iterator i=prop.begin(); i!=prop.end(); i++) {
        m->properties[i.key()]=i.value();
    }

    f.close();
    return true;
}

int PRS1Loader::OpenMachine(Machine *m,QString path,Profile *profile)
{

    qDebug() << "Opening PRS1 " << path;
    QDir dir(path);
    if (!dir.exists() || (!dir.isReadable()))
         return false;


    dir.setFilter(QDir::NoDotAndDotDot | QDir::Dirs | QDir::Files | QDir::Hidden | QDir::NoSymLinks);
    dir.setSorting(QDir::Name);
    QFileInfoList flist=dir.entryInfoList();

    QString filename;
    if (qprogress) qprogress->setValue(0);

    QList<QString> paths;
    for (int i=0;i<flist.size();i++) {
        QFileInfo fi=flist.at(i);
        filename=fi.fileName();

         if ((filename[0].toLower()=='p') && (isdigit(filename[1]))) {
            paths.push_back(fi.canonicalFilePath());
        } else if (filename.toLower()=="properties.txt") {
            ParseProperties(m,fi.canonicalFilePath());
        } else if (filename.toLower()=="e") {
            // don't really give a crap about .004 files yet.
        }
        //if (qprogress) qprogress->Pulse();
    }

    SessionID sid;
    long ext;
    QHash<SessionID, QStringList> sessfiles;
    int size=paths.size();
    int cnt=0;
    bool ok;

    new_sessions.clear();
    for (QList<QString>::iterator p=paths.begin(); p!=paths.end(); p++) {
        dir.setPath(*p);
        if (!dir.exists() || !dir.isReadable()) continue;
        flist=dir.entryInfoList();

        for (int i=0;i<flist.size();i++) {
            QFileInfo fi=flist.at(i);
            QString ext_s=fi.fileName().section(".",-1);
            QString session_s=fi.fileName().section(".",0,-2);

            ext=ext_s.toLong(&ok);
            if (!ok) continue;
            sid=session_s.toLong(&ok);
            if (!ok) continue;

            if (m->SessionExists(sid)) continue; // could skip this and error check data by reloading summary.

            //if (sessfiles[session].capacity()==0) sessfiles[session].resize(3);

            if ((ext==1) || (ext==0)) {
                OpenFile(m,fi.canonicalFilePath()); // Open just the summary files first round
            } else {
                sessfiles[sid].push_back(fi.canonicalFilePath()); // and keep the rest of the names
            }
            //cnt++;

            //if (qprogress) qprogress->setValue((float(cnt)/float(size)*33.0));
            //QApplication::processEvents();

        }
    }
    cnt=0;
    size=new_sessions.size();
    for (QHash<SessionID, Session *>::iterator it=new_sessions.begin();it!=new_sessions.end();it++) {
        sid=it.key();

        if (sessfiles.contains(sid)) {
            for (int j=0;j<sessfiles[sid].size();j++) {
                QString name=sessfiles[sid][j];
                if (name.endsWith(".002")) {
                    OpenFile(m,name);
                } else if (name.endsWith(".005")) {
                    //OpenFile(m,name);
                    OpenWaveforms(sid,name);
                }
            }
        }
        // sessions are fully loaded here..

        cnt++;
        if (qprogress) qprogress->setValue(0.0+(float(cnt)/float(size)*100.0));
        QApplication::processEvents();
    }
    // strictly can do this in the above loop, but this is cautionary
    cnt=0;
    //QVector<SessionID> KillList;
    for (QHash<SessionID, Session *>::iterator it=new_sessions.begin();it!=new_sessions.end();it++) {
        Session *sess=it.value();

        if ((sess->length()) == 0) {
        //const double ignore_thresh=300.0/3600.0;// Ignore useless sessions under 5 minute
        //if (sess->hours()<=ignore_thresh) {
            qDebug() << "Ignoring empty session" << sess->session();
            SessionID id=sess->session();
            delete sess;
            new_sessions[id]=NULL;
            //KillList.push_back(id);
            continue;
        }

        if (sess->count(CPAP_IPAP)>0) {
            //sess->summaryCPAP_Mode]!=MODE_ASV)
            sess->settings[CPAP_Mode]=MODE_BIPAP;

            if (sess->settings[PRS1_FlexMode].toInt()!=PR_NONE) {
                sess->settings[PRS1_FlexMode]=PR_BIFLEX;
            }

            sess->setAvg(CPAP_Pressure,(sess->avg(CPAP_EPAP)+sess->avg(CPAP_IPAP))/2.0);
            sess->setWavg(CPAP_Pressure,(sess->wavg(CPAP_EPAP)+sess->wavg(CPAP_IPAP))/2.0);
            sess->setMin(CPAP_Pressure,sess->Min(CPAP_EPAP));
            sess->setMax(CPAP_Pressure,sess->Max(CPAP_IPAP));
            sess->set90p(CPAP_Pressure,(sess->p90(CPAP_IPAP)+sess->p90(CPAP_EPAP))/2.0);
            //sess->p90(CPAP_EPAP);
            //sess->p90(CPAP_IPAP);
        } else {
            //sess->avg(CPAP_Pressure);
            //sess->wavg(CPAP_Pressure);
            //sess->p90(CPAP_Pressure);
            //sess->Min(CPAP_Pressure);
            //sess->Max(CPAP_Pressure);
            //sess->cph(CPAP_Pressure);

            if (!sess->settings.contains(CPAP_PressureMin)) {
                sess->settings[CPAP_BrokenSummary]=true;
                //sess->set_last(sess->first());
                if (sess->Min(CPAP_Pressure)==sess->Max(CPAP_Pressure)) {
                    sess->settings[CPAP_Mode]=MODE_CPAP; // no ramp
                } else {
                    sess->settings[CPAP_Mode]=MODE_UNKNOWN;
                }
                //sess->Set("FlexMode",PR_UNKNOWN);
            }

        }
        if (sess->settings[CPAP_Mode]==MODE_CPAP) {
            //sess->settings[CPAP_PressureMax]=sess->settings[CPAP_PressureMin];
        }

        sess->SetChanged(true);
        m->AddSession(sess,profile);
        cnt++;
        if (qprogress) qprogress->setValue(33.0+(float(cnt)/float(size)*33.0));
        QApplication::processEvents();

    }

    m->properties[STR_PROP_DataVersion]=QString().sprintf("%i",prs1_data_version);
    m->properties["LastImported"]=QDateTime::currentDateTime().toString(Qt::ISODate);
    m->Save(); // Save any new sessions to disk in our format
    if (qprogress) qprogress->setValue(100);

    return cnt;
}

//struct PRS1SummaryR5 {
//    quint8 unknown1;
//    quint8 unknown2;
//    quint8 unknown3;
//    quint8 pressure_min;
//    quint8 pressure_max;
//    quint8 unknown;

//    quint32 flags;


//};// __attribute__((packed));

bool PRS1Loader::ParseSummary(Machine *mach, qint32 sequence, quint32 timestamp, unsigned char *data, quint16 size, char version)
{
    if (mach->SessionExists(sequence))
        return false;

    if (size<44-16)
        return false;

    Session *session=new Session(mach,sequence);
    session->really_set_first(qint64(timestamp)*1000L);
    EventDataType max,min;

    min=float(data[0x03])/10.0;
    session->settings[CPAP_PressureMin]=(double)min;
    //min=session->settings[CPAP_PressureMin].toDouble();
    max=float(data[0x04])/10.0;
    session->settings[CPAP_PressureMax]=(double)max;
    int offset=0;
    if (version==5) { //data[0x05]!=0) { // This is a time value for ASV stuff
        offset=4;   // non zero adds 4 extra fields..
    }

    session->settings[CPAP_RampTime]=(int)data[offset+0x06]; // Minutes. Convert to seconds/hours here?
    session->settings[CPAP_RampPressure]=(EventDataType)data[offset+0x07]/10.0;

    if (max>0) { // Ignoring bipap until I see some more data.
        session->settings[CPAP_Mode]=(int)MODE_APAP;
    } else session->settings[CPAP_Mode]=(int)MODE_CPAP;

    // This is incorrect..
    if (data[offset+0x08] & 0x80) { // Flex Setting
        if (data[offset+0x08] & 0x08) {
            if (max>0) session->settings[PRS1_FlexMode]=(int)PR_AFLEX;
            else session->settings[PRS1_FlexMode]=(int)PR_CFLEXPLUS;
        } else session->settings[PRS1_FlexMode]=(int)PR_CFLEX;
    } else session->settings[PRS1_FlexMode]=(int)PR_NONE;

    session->settings[PRS1_FlexSet]=(int)(data[offset+0x08] & 3);
    session->settings[PRS1_HumidSetting]=(int)data[offset+0x09]&0x0f;
    session->settings[PRS1_HumidStatus]=(data[offset+0x09]&0x80)==0x80;
    session->settings[PRS1_SysLock]=(data[offset+0x0a]&0x80)==0x80;
    session->settings[PRS1_SysOneResistStat]=(data[offset+0x0a]&0x40)==0x40;
    session->settings[PRS1_SysOneResistSet]=(int)data[offset+0x0a]&7;
    session->settings[PRS1_HoseDiam]=((data[offset+0x0a]&0x08)?"15mm":"22mm");
    session->settings[PRS1_AutoOff]=(data[offset+0x0c]&0x10)==0x10;
    session->settings[PRS1_MaskAlert]=(data[offset+0x0c]&0x08)==0x08;
    session->settings[PRS1_ShowAHI]=(data[offset+0x0c]&0x04)==0x04;


    unsigned duration;

    // up to this point appears to becorrect for 0x01 & 0x00
    if (size<59) {
        duration=data[offset+0x12] | (data[0x13] << 8);
        duration*=2;
        session->really_set_last(qint64(timestamp+duration)*1000L);
        if (max>0) {
            session->setMin(CPAP_Pressure,min);
            session->setMax(CPAP_Pressure,max);
        }
        session->setWavg(CPAP_Pressure,min);
    } else {
        // 0X28 & 0X29 is length on r5

        duration=data[offset+0x14] | (data[0x15] << 8);
        if (!duration) {
            delete session;
            return false;
        }

        session->really_set_last(qint64(timestamp+duration)*1000L);
        float hours=float(duration)/3600.0;

        // Not using these because sometimes this summary is broken.
        EventDataType minp,maxp,avgp,p90p;

        minp=float(data[offset+0x16])/10.0;
        maxp=float(data[offset+0x17])/10.0;
        p90p=float(data[offset+0x18])/10.0;
        avgp=float(data[offset+0x19])/10.0;

        if (minp>0) session->setMin(CPAP_Pressure,minp); else session->setMin(CPAP_Pressure,min);
        if (maxp>0) session->setMax(CPAP_Pressure,maxp); else session->setMax(CPAP_Pressure,min);
        if (avgp>0) session->setWavg(CPAP_Pressure,avgp); else session->setWavg(CPAP_Pressure,min);
        if (p90p>0) session->set90p(CPAP_Pressure,p90p); else session->set90p(CPAP_Pressure,min);



        int oc, cc, hc, rc, fc;
        session->setCount(CPAP_Obstructive,oc=(int)data[offset+0x1C] | (data[offset+0x1D] << 8));
        session->setCount(CPAP_ClearAirway,cc=(int)data[offset+0x20] | (data[offset+0x21] << 8));
        session->setCount(CPAP_Hypopnea,hc=(int)data[offset+0x2A] | (data[offset+0x2B] << 8));
        session->setCount(CPAP_RERA,rc=(int)data[offset+0x2E] | (data[offset+0x2F] << 8));
        session->setCount(CPAP_FlowLimit,fc=(int)data[offset+0x30] | (data[offset+0x31] << 8));

        session->setCph(CPAP_Obstructive,float(oc/hours));
        session->setCph(CPAP_ClearAirway,float(cc/hours));
        session->setCph(CPAP_Hypopnea,float(hc/hours));
        session->setCph(CPAP_RERA,float(rc/hours));
        session->setCph(CPAP_FlowLimit,float(fc/hours));
    }
    new_sessions[sequence]=session;
    return true;
}
bool PRS1Loader::Parse002v5(qint32 sequence, quint32 timestamp, unsigned char *buffer, quint16 size)
{
    if (!new_sessions.contains(sequence))
        return false;
    Session *session=new_sessions[sequence];

    ChannelID Codes[]={
        PRS1_00, PRS1_01, CPAP_Pressure, CPAP_EPAP, CPAP_PressurePulse, CPAP_Obstructive,
        CPAP_ClearAirway, CPAP_Hypopnea, PRS1_08,  CPAP_FlowLimit, PRS1_0A, CPAP_CSR,
        PRS1_0C, CPAP_VSnore, PRS1_0E, PRS1_0F, PRS1_10,
        CPAP_LeakTotal, PRS1_12
    };

    int ncodes=sizeof(Codes)/sizeof(QString);
    EventList * Code[0x20]={NULL};

    EventDataType data[10],tmp;


    //qint64 start=timestamp;
    qint64 t=qint64(timestamp)*1000L;
    session->updateFirst(t);
    qint64 tt;
    int pos=0;
    int cnt=0;
    short delta;//,duration;
    QDateTime d;
    bool badcode=false;

    while (pos<size) {
        unsigned char code=buffer[pos++];
        if (code>=ncodes) {
            qDebug() << "Illegal PRS1 code " << hex << int(code) << " appeared at " << hex << pos;
            return false;
        }
        if (code==0) {
        } else
        if (code!=0x12) {
            delta=buffer[pos];
            //duration=buffer[pos+1];
            //delta=buffer[pos+1] << 8 | buffer[pos];
            pos+=2;
            t+=qint64(delta)*1000L;
        }
        ChannelID cpapcode=Codes[(int)code];
        //EventDataType PS;
        tt=t;
        cnt++;
        int fc=0;

        switch (code) {
        case 0x00: // Unknown (ASV Pressure value)
            // offset?
            data[0]=buffer[pos++];
            fc++;
            if (!buffer[pos-1]) {   // WTH???
                data[1]=buffer[pos++];
                fc++;
            }
            if (!buffer[pos-1]) {
                data[2]=buffer[pos++];
                fc++;
            }
            break;
        case 0x01: // Unknown
            if (!Code[1]) {
                if (!(Code[1]=session->AddEventList(cpapcode,EVL_Event,0.1))) return false;
            }
            Code[1]->AddEvent(t,0);
            break;

        case 0x02: // Pressure
            data[0]=buffer[pos++];
            if (!Code[2]) {
                if (!(Code[2]=session->AddEventList(cpapcode,EVL_Event,0.1))) return false;
            }
            Code[2]->AddEvent(t,data[0]);
            break;
        case 0x04: // Pressure Pulse
            data[0]=buffer[pos++];
            if (!Code[3]) {
                if (!(Code[3]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[3]->AddEvent(t,data[0]);
            break;

        case 0x05:
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[4]) {
                if (!(Code[4]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[4]->AddEvent(tt,data[0]);
            break;

        case 0x06:
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[5]) {
                if (!(Code[5]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[5]->AddEvent(tt,data[0]);
            break;
        case 0x07:
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[6]) {
                if (!(Code[6]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[6]->AddEvent(tt,data[0]);
            break;
        case 0x08: // ASV Codes
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[10]) {
                if (!(Code[10]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[10]->AddEvent(tt,data[0]);
            break;
        case 0x09: // ASV Codes
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[11]) {
                if (!(Code[11]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[11]->AddEvent(tt,data[0]);

            break;

        case 0x0a:
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[7]) {
                if (!(Code[7]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[7]->AddEvent(tt,data[0]);
            break;

        case 0x0c:
            data[0]=buffer[pos++];
            tt-=qint64(data[0])*1000L; // Subtract Time Offset
            if (!Code[8]) {
                if (!(Code[8]=session->AddEventList(cpapcode,EVL_Event))) return false;
            }
            Code[8]->AddEvent(tt,data[0]);
            break;


        case 0x0b: // Cheyne Stokes
            data[0]=((unsigned char *)buffer)[pos+1]<<8 | ((unsigned char *)buffer)[pos];
            //data[0]*=2;
            pos+=2;
            data[1]=((unsigned char *)buffer)[pos]; //|buffer[pos+1] << 8
            pos+=1;
            //tt-=delta;
            tt-=qint64(data[1])*1000L;
            if (!Code[9]) {
                if (!(Code[9]=session->AddEventList(cpapcode,EVL_Event)))
                    return false;
            }
            Code[9]->AddEvent(tt,data[0]);
            //session->AddEvent(new Event(tt,cpapcode, data[0], data, 2));
            break;
        case 0x0d: // All the other ASV graph stuff.
            if (!Code[12]) {
                if (!(Code[12]=session->AddEventList(CPAP_IPAP,EVL_Event,0.1))) return false;
                if (!(Code[13]=session->AddEventList(CPAP_IPAPLo,EVL_Event,0.1))) return false;
                if (!(Code[14]=session->AddEventList(CPAP_IPAPHi,EVL_Event,0.1))) return false;
                if (!(Code[15]=session->AddEventList(CPAP_LeakTotal,EVL_Event))) return false;
                if (!(Code[16]=session->AddEventList(CPAP_RespRate,EVL_Event))) return false;
                if (!(Code[17]=session->AddEventList(CPAP_PTB,EVL_Event))) return false;

                if (!(Code[18]=session->AddEventList(CPAP_MinuteVent,EVL_Event))) return false;
                if (!(Code[19]=session->AddEventList(CPAP_TidalVolume,EVL_Event))) return false;
                if (!(Code[20]=session->AddEventList(CPAP_Snore,EVL_Event))) return false;
                if (!(Code[22]=session->AddEventList(CPAP_EPAP,EVL_Event,0.1))) return false;
                if (!(Code[23]=session->AddEventList(CPAP_PS,EVL_Event))) return false;
            }
            Code[12]->AddEvent(t,data[0]=buffer[pos++]); // IAP
            Code[13]->AddEvent(t,buffer[pos++]); // IAP Low
            Code[14]->AddEvent(t,buffer[pos++]); // IAP High
            Code[15]->AddEvent(t,buffer[pos++]); // LEAK
            Code[16]->AddEvent(t,buffer[pos++]); // Breaths Per Minute
            Code[17]->AddEvent(t,buffer[pos++]); // Patient Triggered Breaths
            Code[18]->AddEvent(t,buffer[pos++]); // Minute Ventilation
            tmp=buffer[pos++]*10.0;
            Code[19]->AddEvent(t,tmp); // Tidal Volume
            Code[20]->AddEvent(t,data[2]=buffer[pos++]); // Snore
            if (data[2]>0) {
                if (!Code[21]) {
                    if (!(Code[21]=session->AddEventList(CPAP_VSnore,EVL_Event)))
                        return false;
                }
                Code[21]->AddEvent(t,0); //data[2]); // VSnore
            }
            Code[22]->AddEvent(t,data[1]=buffer[pos++]); // EPAP
            Code[23]->AddEvent(t,data[0]-data[1]);      // Pressure Support
            break;
        case 0x03: // BIPAP Pressure
            qDebug() << "0x03 Observed in ASV data!!????";

            data[0]=buffer[pos++];
            data[1]=buffer[pos++];
//            data[0]/=10.0;
//            data[1]/=10.0;
//            session->AddEvent(new Event(t,CPAP_EAP, 0, data, 1));
//            session->AddEvent(new Event(t,CPAP_IAP, 0, &data[1], 1));
            break;
        case 0x11: // Not Leak Rate
            qDebug() << "0x11 Observed in ASV data!!????";
            //if (!Code[24]) {
             //   Code[24]=new EventList(cpapcode,EVL_Event);
            //}
            //Code[24]->AddEvent(t,buffer[pos++]);
            break;
        case 0x0e: // Unknown
            qDebug() << "0x0E Observed in ASV data!!????";
            data[0]=buffer[pos++]; // << 8) | buffer[pos];
            //session->AddEvent(new Event(t,cpapcode, 0, data, 1));
            break;

        case 0x10: // Unknown
            qDebug() << "0x10 Observed in ASV data!!????";
            data[0]=buffer[pos++]; // << 8) | buffer[pos];
            data[1]=buffer[pos++];
            data[2]=buffer[pos++];
            //session->AddEvent(new Event(t,cpapcode, 0, data, 3));
            break;
        case 0x0f:
            qDebug() << "0x0f Observed in ASV data!!????";

            data[0]=buffer[pos+1]<<8 | buffer[pos];
            pos+=2;
            data[1]=buffer[pos]; //|buffer[pos+1] << 8
            pos+=1;
            tt-=qint64(data[1])*1000L;
            //session->AddEvent(new Event(tt,cpapcode, 0, data, 2));
            break;
        case 0x12: // Summary
            qDebug() << "0x12 Observed in ASV data!!????";
            data[0]=buffer[pos++];
            data[1]=buffer[pos++];
            data[2]=buffer[pos+1]<<8 | buffer[pos];
            pos+=2;
            //session->AddEvent(new Event(t,cpapcode, 0, data,3));
            break;
        default:  // ERROR!!!
            qWarning() << "Some new fandangled PRS1 code detected " << hex << int(code) << " at " << pos-1;
            badcode=true;
            break;
        }
        if (badcode) {
            break;
        }
    }
    session->updateLast(t);
    session->m_cnt.clear();
    session->m_cph.clear();
    return true;

}

bool PRS1Loader::Parse002(qint32 sequence, quint32 timestamp, unsigned char *buffer, quint16 size)
{
    if (!new_sessions.contains(sequence))
        return false;

    unsigned char code;
    EventList * Code[0x20]={0};
    EventDataType data[10];
    int cnt=0;
    short delta;
    int tdata;
    quint64 pos;
    qint64 t=qint64(timestamp)*1000L,tt;

    Session *session=new_sessions[sequence];
    session->updateFirst(t);

    for (pos=0;pos<size;) {
        code=buffer[pos++];
        if (code>0x12) {
            qDebug() << "Illegal PRS1 code in" << sequence << hex << int(code) << " appeared at " << hex << pos;
            return false;
        }
        if (code!=0x12) {
            delta=buffer[pos+1] << 8 | buffer[pos];
            pos+=2;
            t+=qint64(delta)*1000L;
            tt=t;
        }
        cnt++;
        switch (code) {

        case 0x00: // Unknown 00
            if (!Code[0]) {
                if (!(Code[0]=session->AddEventList(PRS1_00,EVL_Event))) return false;
            }
            Code[0]->AddEvent(t,buffer[pos++]);
            break;
        case 0x01: // Unknown
            if (!Code[1]) {
                if (!(Code[1]=session->AddEventList(PRS1_01,EVL_Event))) return false;
            }
            Code[1]->AddEvent(t,0);
            break;
        case 0x02: // Pressure
            if (!Code[2]) {
                Code[2]=session->AddEventList(CPAP_Pressure,EVL_Event,0.1);
                if (!Code[2]) return false;
            }
            Code[2]->AddEvent(t,buffer[pos++]);
            break;
        case 0x03: // BIPAP Pressure
            if (!Code[3]) {
                if (!(Code[3]=session->AddEventList(CPAP_EPAP,EVL_Event,0.1))) return false;
                if (!(Code[4]=session->AddEventList(CPAP_IPAP,EVL_Event,0.1))) return false;
                if (!(Code[5]=session->AddEventList(CPAP_PS,EVL_Event,0.1))) return false;
            }
            Code[3]->AddEvent(t,data[0]=buffer[pos++]);
            Code[4]->AddEvent(t,data[1]=buffer[pos++]);
            Code[5]->AddEvent(t,data[1]-data[0]);
            break;
        case 0x04: // Pressure Pulse
            if (!Code[6]) {
                if (!(Code[6]=session->AddEventList(CPAP_PressurePulse,EVL_Event))) return false;
            }
            Code[6]->AddEvent(t,buffer[pos++]);
            //qDebug() << hex << data[0];
            break;
        case 0x05: // RERA
            data[0]=buffer[pos++];
            tt=t-(qint64(data[0])*1000L);
            if (!Code[7]) {
                if (!(Code[7]=session->AddEventList(CPAP_RERA,EVL_Event))) return false;
            }
            Code[7]->AddEvent(tt,data[0]);
            break;

        case 0x06: // Obstructive Apoanea
            data[0]=buffer[pos++];
            tt=t-(qint64(data[0])*1000L);
            if (!Code[8]) {
                if (!(Code[8]=session->AddEventList(CPAP_Obstructive,EVL_Event))) return false;
            }
            Code[8]->AddEvent(tt,data[0]);
            break;
        case 0x07: // Clear Airway
            data[0]=buffer[pos++];
            tt=t-(qint64(data[0])*1000L);
            if (!Code[9]) {
                if (!(Code[9]=session->AddEventList(CPAP_ClearAirway,EVL_Event))) return false;
            }
            Code[9]->AddEvent(tt,data[0]);
            break;
        case 0x0a: // Hypopnea
            data[0]=buffer[pos++];
            tt=t-(qint64(data[0])*1000L);
            if (!Code[10]) {
                if (!(Code[10]=session->AddEventList(CPAP_Hypopnea,EVL_Event))) return false;
            }
            Code[10]->AddEvent(tt,data[0]);
            break;
        case 0x0c: // Flow Limitation
            data[0]=buffer[pos++];
            tt=t-(qint64(data[0])*1000L);
            if (!Code[11]) {
                if (!(Code[11]=session->AddEventList(CPAP_FlowLimit,EVL_Event))) return false;
            }
            Code[11]->AddEvent(tt,data[0]);
            break;

        case 0x0b: // Hypopnea related code
            data[0]=buffer[pos++];
            data[1]=buffer[pos++];
            if (!Code[12]) {
                if (!(Code[12]=session->AddEventList(PRS1_0B,EVL_Event))) return false;
            }
            // FIXME
            Code[12]->AddEvent(t,data[0]);
            break;
        case 0x0d: // Vibratory Snore
            if (!Code[13]) {
                if (!(Code[13]=session->AddEventList(CPAP_VSnore,EVL_Event))) return false;
            }
            Code[13]->AddEvent(t,0);
            break;
        case 0x11: // Leak Rate & Snore Graphs
            data[0]=buffer[pos++];
            data[1]=buffer[pos++];
            if (!Code[14]) {
                if (!(Code[14]=session->AddEventList(CPAP_LeakTotal,EVL_Event))) return false;
                if (!(Code[15]=session->AddEventList(CPAP_Snore,EVL_Event))) return false;
            }
            Code[14]->AddEvent(t,data[0]);
            Code[15]->AddEvent(t,data[1]);
            if (data[1]>0) {
                if (!Code[16]) {
                    if (!(Code[16]=session->AddEventList(CPAP_VSnore2,EVL_Event))) return false;
                }
                Code[16]->AddEvent(t,data[1]);
            }
            break;
        case 0x0e: // Unknown
            data[0]=((char *)buffer)[pos++];
            data[1]=buffer[pos++]; //(buffer[pos+1] << 8) | buffer[pos];
            //data[0]/=10.0;
            //pos+=2;
            data[2]=buffer[pos++];

            if (!Code[17]) {
                if (!(Code[17]=session->AddEventList(PRS1_0E,EVL_Event))) return false;
            }
            tdata=unsigned(data[1]) << 8 | unsigned(data[0]);
            Code[17]->AddEvent(t,tdata);
            //qDebug() << hex << data[0] << data[1] << data[2];
            //session->AddEvent(new Event(t,cpapcode, 0, data, 3));
            //tt-=data[1]*1000;
            //session->AddEvent(new Event(t,CPAP_CSR, data, 2));
            break;
        case 0x10: // Unknown
            data[0]=buffer[pos++]; // << 8) | buffer[pos];
            data[1]=buffer[pos++];
            data[2]=buffer[pos++];
            if (!Code[20]) {
                if (!(Code[20]=session->AddEventList(PRS1_10,EVL_Event))) return false;
            }
            Code[20]->AddEvent(t,data[0]);
            break;
        case 0x0f: // Cheyne Stokes Respiration
            data[0]=buffer[pos+1]<<8 | buffer[pos];
            pos+=2;
            data[1]=buffer[pos++];
            tt=t-qint64(data[1])*1000L;
            if (!Code[23]) {
                if (!(Code[23]=session->AddEventList(CPAP_CSR,EVL_Event))) return false;
            }
            Code[23]->AddEvent(tt,data[0]);
            break;
        case 0x12: // Summary
            data[0]=buffer[pos++];
            data[1]=buffer[pos++];
            data[2]=buffer[pos+1]<<8 | buffer[pos];
            pos+=2;
            if (!Code[24]) {
                if (!(Code[24]=session->AddEventList(PRS1_12,EVL_Event))) return false;
            }
            Code[24]->AddEvent(t,data[0]);
            break;
        default:
            // ERROR!!!
            qWarning() << "Some new fandangled PRS1 code detected in" << sequence << hex << int(code) << " at " << pos-1;
            return false;
        }
    }
    session->updateLast(t);
    session->m_cnt.clear();
    session->m_cph.clear();
    session->m_lastchan.clear();
    session->m_firstchan.clear();
    return true;
}


bool PRS1Loader::ParseWaveform(qint32 sequence, quint32 timestamp, unsigned char *data, quint16 size, quint16 duration, quint16 num_signals, quint16 interleave, quint8 sample_format)
{
    if (!new_sessions.contains(sequence))
        return false;

    qint64 t=qint64(timestamp)*1000L;

    Session *session=new_sessions[sequence];

    if (num_signals==1) {
        session->updateFirst(t);
        double d=duration*1000;
        EventDataType rate=d / EventDataType(size);
        EventList *ev=session->AddEventList(CPAP_FlowRate,EVL_Waveform,1.0,0.00,0,0,rate);
        ev->AddWaveform(t,(char *)data,size,qint64(duration)*1000L);
        session->updateLast(t+qint64(duration)*1000L);

    }

    return true;
}

bool PRS1Loader::OpenFile(Machine *mach, QString filename)
{
    int sequence,version;
    quint32 timestamp;
    qint64 pos;
    unsigned char ext,htype,sum;
    unsigned char *header,*data;
    int chunk,hl;
    quint16 size,datasize,c16,crc;

    // waveform stuff
    vector<WaveHeaderList> whl;
    quint16 interleave,duration,num_signals;
    quint8  sample_format;

    QFile f(filename);
    if (!f.exists())
        return false;

    if (!f.open(QIODevice::ReadOnly))
        return false;

    qint64 filesize=f.size();
    if (f.read((char *)m_buffer,filesize)<filesize) {
        qDebug() << "Couldn't read full file" << filename;
        return false;
    }
    pos=0;
    bool wasfaulty=false, faulty=false;
    for (chunk=0;pos<filesize;++chunk, pos+=size) {
        header=&m_buffer[pos];
        if (header[0]!=PRS1_MAGIC_NUMBER) {
            if (chunk==0)
                return false;
            break;
        }

        size=(header[2] << 8) | header[1];
        htype=header[3]; // 00 = normal // 01=waveform // could be a bool?
        version=header[4]; // == 5
        ext=header[6];
        sequence=(header[10] << 24) | (header[9] << 16) | (header[8] << 8) | header[7];
        timestamp=(header[14] << 24) | (header[13] << 16) | (header[12] << 8) | header[11];

        if (ext==5) {
            duration=header[0xf] | header[0x10] << 8;    // block duration in seconds
            num_signals=header[0x12] | header[0x13] << 8;
            if (num_signals>2) {
                qWarning() << "More than 2 Waveforms in " << filename;
                return false;
            }
            long pos2=0x14+(num_signals-1)*3;
            // add the in reverse...
            for (int i=0;i<num_signals;i++) {
                interleave=header[pos2] | header[pos2+1] << 8;
                sample_format=header[pos2+2];
                whl.push_back(WaveHeaderList(interleave,sample_format));
                pos2-=3;
            }
            hl=15+6+(num_signals*3);

        } else hl=16;

        wasfaulty=faulty;
        sum=0;
        for (int i=0; i<hl-1; i++) sum+=header[i];
        unsigned char c8=header[hl-1];
        if (sum!=c8) {
            if (chunk==0) {
                qDebug() << "File" << filename << "has faulty header at" << pos;
                if ((size>0) && (pos+size<filesize) && (header[size]==2)) {
                    faulty=true;
                    continue;
                }

                return (chunk!=0);
            }
            break;
        }
        datasize=size-hl-2;

        data=&header[hl];

#ifdef PRS1_CRC_CHECK
        c16=CRC16(data,datasize);
        crc=(data[datasize+1] << 8) | data[datasize];
        if (crc!=c16) {
            qDebug() << "File" << filename << "failed CRC check at chunk" << chunk << "wanted" << crc << "got" << c16;
            faulty=true;
            continue;
        }
#endif

        if (wasfaulty) {
            qDebug() << "Managed to continue with next block";
        }


        //qDebug() << "Loading" << filename << sequence << timestamp << size;
        //if (ext==0) ParseCompliance(data,size);
        if (ext<=1) {
            ParseSummary(mach,sequence,timestamp,data,datasize,version);
        } else if (ext==2) {
            if (version==5) {
               Parse002v5(sequence,timestamp,data,datasize);
            } else {
               Parse002(sequence,timestamp,data,datasize);
            }
        } else if (ext==5) {
            //ParseWaveform(mach,sequence,timestamp,data,datasize,duration,num_signals,interleave,sample_format);
        }
    }
    return true;
}




/*// v2 event parser.
bool PRS1Loader::Parse002(Session *session,unsigned char *buffer,int size,qint64 timestamp,long fpos)
{
//    ChannelID Codes[]={
//        PRS1_Unknown00, PRS1_Unknown01, CPAP_Pressure, CPAP_EPAP, CPAP_PressurePulse, CPAP_RERA, CPAP_Obstructive, CPAP_ClearAirway,
//        PRS1_Unknown08, PRS1_Unknown09, CPAP_Hypopnea, PRS1_Unknown0B, CPAP_FlowLimit, CPAP_VSnore, PRS1_Unknown0E, CPAP_CSR, PRS1_Unknown10,
//        CPAP_LeakTotal, PRS1_Unknown12
//    };
//    int ncodes=sizeof(Codes)/sizeof(ChannelID);

    //QHash<ChannelID,EventList *> Code;
    EventList * Code[0x20]={NULL};

    EventDataType data[10];

    session->updateFirst(timestamp);
    //qint64 start=timestamp;
    qint64 t=timestamp;
    qint64 tt;
    int pos=0;
    while (pos<size) {
        unsigned char code=buffer[pos++];
        if (code>0x12) {
        }
        delta=0;
        if (code!=0x12) {
            delta=buffer[pos+1] << 8 | buffer[pos];
            pos+=2;
            t+=qint64(delta)*1000L;
            tt=t;
        }

    session->updateLast(t);

    return true;
}

bool PRS1Loader::Parse002ASV(Session *session,unsigned char *buffer,int size,qint64 timestamp,long fpos)
{
}

bool PRS1Loader::OpenSummary(Session *session,QString filename) // Read .001/.000 file
{
    int size,seconds,br,htype,version,sequence;
    qint64 timestamp;
    unsigned char header[24];
    unsigned char ext,sum;

    //qDebug() << "Opening PRS1 Summary " << filename;
    QFile f(filename);

    if (!f.open(QIODevice::ReadOnly))
          return false;

    if (!f.exists())
        return false;

    int hl=16;

    br=f.read((char *)header,hl);

    if (header[0]!=PRS1_MAGIC_NUMBER)
        return false;

    sequence=size=timestamp=seconds=ext=0;
    sequence=(header[10] << 24) | (header[9] << 16) | (header[8] << 8) | header[7];
    timestamp=(header[14] << 24) | (header[13] << 16) | (header[12] << 8) | header[11];
    size=(header[2] << 8) | header[1];
    ext=header[6]; // 0 = compliance only, 1 = has data

    htype=header[3]; // 00 = normal // 01=waveform // could be a bool?
    version=header[4];
    sequence=sequence;
    version=version; // don't need it here?

    htype=htype; // shut the warning up.. this is useless.

    if (ext!=PRS1_SUMMARY_FILE)
        return false;

    size-=(hl+2);

    // Calculate header checksum and compare to verify header
    sum=0;
    for (int i=0; i<hl-1; i++) sum+=header[i];
    if (sum!=header[hl-1])
        return false;

    if (size<=19) {
      //  qDebug() << "Ignoring short session file " << filename;
        return false;
    }

    qint64 date=timestamp*1000;


    //memset(m_buffer,0,size);
    unsigned char * buffer=m_buffer;
    br=f.read((char *)buffer,size);
    if (br<size) {
        return false;
    }

    unsigned char crcbytes[2];
    if (f.read((char *)crcbytes,2)!=2) {
        qDebug() << "No ending CRC bytes in" << filename;
    }
    quint16 crc=(crcbytes[1] << 8) | crcbytes[0];
    quint16 c16=CRC16(buffer,size);
    if (crc!=c16) {
        qDebug() << "Summary CRC check failed, wanted" << crc << "got" << c16;
    }

    if ((ext==1) && size<0x30)
        return true;

    session->set_first(date);

    double max;
    session->settings[CPAP_PressureMin]=(EventDataType)buffer[0x03]/10.0;
    session->settings[CPAP_PressureMax]=max=(EventDataType)buffer[0x04]/10.0;
    int offset=0;
    if (buffer[0x05]!=0) { // This is a time value for ASV stuff
        // non zero adds extra fields..
        offset=4;
    }

    session->settings[CPAP_RampTime]=(int)buffer[offset+0x06]; // Minutes. Convert to seconds/hours here?
    session->settings[CPAP_RampPressure]=(EventDataType)buffer[offset+0x07]/10.0;

    if (max>0) { // Ignoring bipap until I see some more data.
        session->settings[CPAP_Mode]=(int)MODE_APAP;
    } else session->settings[CPAP_Mode]=(int)MODE_CPAP;

    // This is incorrect..
    if (buffer[offset+0x08] & 0x80) { // Flex Setting
        if (buffer[offset+0x08] & 0x08) {
            if (max>0) session->settings[PRS1_FlexMode]=(int)PR_AFLEX;
            else session->settings[PRS1_FlexMode]=(int)PR_CFLEXPLUS;
        } else session->settings[PRS1_FlexMode]=(int)PR_CFLEX;
    } else session->settings[PRS1_FlexMode]=(int)PR_NONE;

    session->settings["FlexSet"]=(int)buffer[offset+0x08] & 3;
    session->settings["HumidSet"]=(int)buffer[offset+0x09]&0x0f;
    session->settings["HumidStat"]=(buffer[offset+0x09]&0x80)==0x80;
    session->settings["SysLock"]=(buffer[offset+0x0a]&0x80)==0x80;
    session->settings["SysOneResistStat"]=(buffer[offset+0x0a]&0x40)==0x40;
    session->settings["SysOneResistSet"]=(int)buffer[offset+0x0a]&7;
    session->settings["HoseDiam"]=((buffer[offset+0x0a]&0x08)?"15mm":"22mm");
    session->settings["AutoOff"]=(buffer[offset+0x0c]&0x10)==0x10;
    session->settings["MaskAlert"]=(buffer[offset+0x0c]&0x08)==0x08;
    session->settings["ShowAHI"]=(buffer[offset+0x0c]&0x04)==0x04;

    unsigned duration=buffer[offset+0x14] | (buffer[0x15] << 8);
    //session->settings[CPAP_Duration]=(int)duration;
    //qDebug() << "ID: " << session->session() << " " << duration;
    //float hours=float(duration)/3600.0;
    //session->set_hours(hours);
    if (!duration)
        return false;

    session->set_last(date+qint64(duration)*1000L);
    //session->settings[PRS1_PressureMinAchieved]=buffer[offset+0x16]/10.0;
    //session->settings[PRS1_PressureMaxAchieved]=buffer[offset+0x17]/10.0;
    //session->settings[PRS1_PressureAvg]=buffer[offset+0x18]/10.0;
    //session->settings[PRS1_Pressure90]=buffer[offset+0x19]/10.0;

    if (max==0) {
      //  session->settings[PRS1_PressureAvg]=session->settings[PRS1_PressureMin];
    }




//   if (size==0x4d) {

//        session->settings[CPAP_Obstructive]=(int)buffer[offset+0x1C] | (buffer[offset+0x1D] << 8);
//        session->settings[CPAP_ClearAirway]=(int)buffer[offset+0x20] | (buffer[offset+0x21] << 8);
//        session->settings[CPAP_Hypopnea]=(int)buffer[offset+0x2A] | (buffer[offset+0x2B] << 8);
//        session->settings[CPAP_RERA]=(int)buffer[offset+0x2E] | (buffer[offset+0x2F] << 8);
//        session->settings[CPAP_FlowLimit]=(int)buffer[offset+0x30] | (buffer[offset+0x31] << 8);
//    }
    return true;
}

bool PRS1Loader::OpenEvents(Session *session,QString filename)
{
    int size,sequence,seconds,br,version;
    qint64 timestamp;
    unsigned char header[24]; // use m_buffer?
    unsigned char ext,htype;

    QFile f(filename);
    if (!f.open(QIODevice::ReadOnly))
        return false;

    int hl=16;
    int chunk=0;

    // Who'd of thought this chunked.. it does on certain ASV machines..

    long pos=0;
    do {
        br=f.read((char *)header,hl);

        if (header[0]!=PRS1_MAGIC_NUMBER) {
            if (chunk==0)
                return false;
            break;
        }
        sequence=size=timestamp=seconds=ext=0;
        sequence=(header[10] << 24) | (header[9] << 16) | (header[8] << 8) | header[7];
        timestamp=(header[14] << 24) | (header[13] << 16) | (header[12] << 8) | header[11];
        size=(header[2] << 8) | header[1];
        ext=header[6];
        htype=header[3]; // 00 = normal // 01=waveform // could be a bool?
        version=header[4];// == 5

        htype=htype;
        sequence=sequence;
        if (ext!=PRS1_EVENT_FILE) { // 2 == Event file
            if (chunk==0)
                return false;
            break; // just end and take what we got..
        }

        //size|=(header[3]<<16) | (header[4]<<24); // the jury is still out on the 32bitness of one. doesn't matter here anyway.

        size-=(hl+2);

        unsigned char sum=0;
        for (int i=0; i<hl-1; i++) sum+=header[i];
        if (sum!=header[hl-1]) {
            if (chunk==0)
                return false;
            break;
        }
        pos+=hl;

        unsigned char *buffer=(unsigned char *)m_buffer;
        br=f.read((char *)buffer,size);
        if (br<size) {
            if (chunk==0)
                return false;
            break;
        }
        unsigned char crcbytes[2];
        if (f.read((char *)crcbytes,2)!=2) {
            qDebug() << "No ending CRC bytes in" << filename;
        }
        quint16 crc=(crcbytes[1] << 8) | crcbytes[0];
        quint16 c16=CRC16(buffer,size);
        if (crc!=c16) {
            qDebug() << "CRC check failed, wanted" << crc << "got" << c16;
        }


        if (version==0) {
            if (!Parse002(session,buffer,size,timestamp*1000L,pos)) {
                qDebug() << "Couldn't Parse chunk" << chunk << "of PRS1 Event File " << filename;
            }
        } else if (version==5) {
            if (!Parse002ASV(session,buffer,size,timestamp*1000L,pos)) {
                qDebug() << "Couldn't Parse chunk" << chunk << "PRS1 (ASV) Event File " << filename;
            }
        }
        pos+=size+2;
        chunk++;
    } while(1);
    return true;
} */


bool PRS1Loader::OpenWaveforms(SessionID sid, QString filename)
{
    Session * session=new_sessions[sid];
    //int sequence,seconds,br,htype,version,numsignals;
    QFile file(filename);
    if (!file.open(QIODevice::ReadOnly)) {
        qWarning() << "Couldn't open waveform file" << filename;
        return false;
    }

    int pos,br,size=file.size();
    if (size>max_load_buffer_size) {
        qWarning() << "Waveform too big, increase max_load_buffer_size in PRS1Loader sourcecode" << filename;
        return false;
    }

    br=file.read((char *)m_buffer,size);
    if (br<size) {
        qWarning() << "Couldn't read waveform data.. Disk error?" << filename;
        return false;
    }

    // Look at the initial header and assume this header size for the lot.
    if ((m_buffer[0]!=2) || (m_buffer[6]!=0x05)) {
        qWarning() << "Not correct waveform format" << filename;
        return false;
    }
    //quint8 version=m_buffer[4];
    quint32 start=m_buffer[0xb] | m_buffer[0xc] << 8 | m_buffer[0xd] << 16 | m_buffer[0x0e] << 24;

    session->updateFirst(qint64(start)*1000L);

    quint16 num_signals=m_buffer[0x12] | m_buffer[0x13] << 8;
    if (num_signals>2) {
        qWarning() << "More than 2 Waveforms in " << filename;
        return false;
    }
    pos=0x14+(num_signals-1)*3;
    vector<WaveHeaderList> whl;
    // add the in reverse...
    for (int i=0;i<num_signals;i++) {
        quint16 interleave=m_buffer[pos] | m_buffer[pos+1] << 8;
        quint8  sample_format=m_buffer[pos+2];
        whl.push_back(WaveHeaderList(interleave,sample_format));
        pos-=3;
    }
    int hl=15+5+(num_signals*3);
    quint16 duration,length=0;
    quint32 timestamp,lasttimestamp;


    pos=0;
    int block=0;
    lasttimestamp=start;
    duration=0;
    int corrupt=0;
    char waveform[2][500000];
    int wlength[2];
    qint64 wdur[2];
    //EventList *evl[num_signals];
    for (int i=0;i<num_signals;i++) {
        wlength[i]=0;
        wdur[i]=0;
        //evl[i]=NULL;

        //waveform[i].resize(500000);
    }
    //SampleFormat *wf[num_signals];
    //EventList *FlowData=EventList(CPAP_FlowRate, EVL_Waveform,1,0,-128,128);
    //EventList *MaskData=EventList(CPAP_MaskPressure, EVL_Waveform,1,0,-128,128);

    //QString FlowRate=CPAP_FlowRate;
    //QString MaskPressure="MaskPressure";
    ChannelID wc[2]={CPAP_FlowRate,CPAP_MaskPressure};
    do {
        timestamp=m_buffer[pos+0xb] | m_buffer[pos+0xc] << 8 | m_buffer[pos+0xd] << 16 | m_buffer[pos+0x0e] << 24;
        register unsigned char sum8=0;
        for (int i=0;i<hl;i++) sum8+=m_buffer[pos+i];
        if (m_buffer[pos+hl]!=sum8) {
            if (block==0) {
                qDebug() << "Faulty Header Checksum, aborting" << filename;
                return false;
            }
            if (++corrupt>3) {
                qDebug() << "3 Faulty Waveform Headers in a row.. Aborting" << filename;
                return false;
            }
            qDebug() << "Faulty Header Checksum, skipping block" << block;
            pos+=length;
            continue;
        } else {
            int diff=timestamp-(lasttimestamp+duration);
            if (block==1) {
                if (diff>0)
                    start-=diff;
            }
            length=m_buffer[pos+0x1] | m_buffer[pos+0x2] << 8;      // block length in bytes
            duration=m_buffer[pos+0xf] | m_buffer[pos+0x10] << 8;    // block duration in seconds
            if (diff<0) {
                qDebug() << "Padding waveform to keep sync" << block;
                //diff=qAbs(diff);
                for (int i=0;i<num_signals;i++) {
                    for (int j=0;j<diff;j++) {
                        for (int k=0;k<whl[i].interleave;k++)
                            waveform[i][wlength[i]++]=0;
                    }
                    wdur[i]+=diff;
                }

            } else
            if (diff>0 && wlength[0]>0)  {
                qDebug() << "Timestamp resync" << block << diff << corrupt << duration << timestamp-lasttimestamp << filename;


                for (int i=0;i<num_signals;i++) {
                    double rate=(double(wdur[i])*1000.0)/double(wlength[i]);
                    double gain;
                    if (i==1) gain=0.1; else gain=1;
                    EventList *a=session->AddEventList(wc[i],EVL_Waveform,gain,0,0,0,rate);
                    //EventList *a=new EventList(wc[i],EVL_Waveform,gain,0,0,0,rate);
                    //session->machine()->registerChannel(wc[i]);
                    if (whl[i].sample_format)
                        a->AddWaveform(qint64(start)*1000L,(unsigned char *)waveform[i],wlength[i],qint64(wdur[i])*1000L);
                    else {
                        a->AddWaveform(qint64(start)*1000L,(char *)waveform[i],wlength[i],qint64(wdur[i])*1000L);
                    }
                    if (wc[i]==CPAP_FlowRate) {
                        a->setMax(120);
                        a->setMin(-120);
                    } else if (wc[i]==CPAP_MaskPressure) {
//                       int v=ceil(a->Max()/5);
//                        a->setMax(v*5);
//                        v=floor(a->Min()/5);
//                        a->setMin(v*5);
                    }

                    session->updateLast(start+(qint64(wdur[i])*1000L));
                    wlength[i]=0;
                    wdur[i]=0;
                }
                start=timestamp;
                corrupt=0;
            }
        }

        pos+=hl+1;
        //qDebug() <<  (duration*num_signals*whl[0].interleave) << duration;
        if (num_signals==1) { // no interleave.. this is much quicker.
            int bs=duration*whl[0].interleave;
            memcpy((char *)&(waveform[0])[wlength[0]],(char *)&m_buffer[pos],bs);

            wlength[0]+=bs;

            pos+=bs;
        } else {
            for (int i=0;i<duration;i++) {
                for (int s=0;s<num_signals;s++) {
                    memcpy((char *)&(waveform[s])[wlength[s]],(char *)&m_buffer[pos],whl[s].interleave);
                    wlength[s]+=whl[s].interleave;
                    pos+=whl[s].interleave;
                }
            }
        }
        for (int i=0;i<num_signals;i++) wdur[i]+=duration;
        pos+=2;
        block++;
        lasttimestamp=timestamp;
    } while (pos<size);

    for (int i=0;i<num_signals;i++) {
        double rate=(double(wdur[i])*1000.0)/double(wlength[i]);
        double gain;
        if (i==1) gain=0.1; else gain=1;
        EventList *a=session->AddEventList(wc[i],EVL_Waveform,gain,0,0,0,rate);

        if (whl[i].sample_format)
            a->AddWaveform(qint64(start)*1000L,(unsigned char *)waveform[i],wlength[i],qint64(wdur[i])*1000L);
        else {
            a->AddWaveform(qint64(start)*1000L,(char *)waveform[i],wlength[i],qint64(wdur[i])*1000L);
        }
        if (wc[i]==CPAP_FlowRate) {
            a->setMax(120);
            a->setMin(-120);
        } else if (wc[i]==CPAP_MaskPressure) {
        }
        session->updateLast(start+qint64(wdur[i])*1000L);
    }
    // lousy family 5 check to see if already has RespRate
    return true;
}

void InitModelMap()
{
    ModelMap[0x34]="RemStar Pro with C-Flex+";
    ModelMap[0x35]="RemStar Auto with A-Flex";
    ModelMap[0x36]="RemStar BiPAP Pro with Bi-Flex";
    ModelMap[0x37]="RemStar BiPAP Auto with Bi-Flex";
    ModelMap[0x38]="RemStar Plus :(";
    ModelMap[0x41]="BiPAP autoSV Advanced";
}

bool initialized=false;
void PRS1Loader::Register()
{
    if (initialized) return;
    qDebug() << "Registering PRS1Loader";
    RegisterLoader(new PRS1Loader());
    InitModelMap();
    initialized=true;
}



