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Rewrite of PRS1 Waveform Loader

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This commit is contained in:
Mark Watkins 2011-07-21 21:02:23 +10:00
parent 542791c150
commit 537f42953a
5 changed files with 200 additions and 17 deletions
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2
SleepLib/event.h
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@ -10,7 +10,7 @@
#include <QDateTime>
#include "machine_common.h"
typedef double EventDataType;
typedef float EventDataType;
class Event
{

206
SleepLib/loader_plugins/prs1_loader.cpp
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@ -889,7 +889,181 @@ bool PRS1Loader::OpenEvents(Session *session,QString filename)
return true;
}
struct WaveHeaderList {
quint16 interleave;
quint8 sample_format;
WaveHeaderList(quint16 i,quint8 f){ interleave=i; sample_format=f; }
};
bool PRS1Loader::OpenWaveforms(Session *session,QString filename)
{
//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;
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;
quint32 timestamp,lasttimestamp;
pos=0;
int block=0;
lasttimestamp=start;
duration=0;
int corrupt=0;
char waveform[num_signals][500000];
int wlength[num_signals];
int wdur[num_signals];
for (int i=0;i<num_signals;i++) {
wlength[i]=0;
wdur[i]=0;
//waveform[i].resize(500000);
}
SampleFormat *wf[num_signals];
MachineCode 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=(lasttimestamp+duration)-timestamp;
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 || corrupt) {
qDebug() << "Timestamp restarts" << diff << corrupt << duration;
for (int i=0;i<num_signals;i++) {
wf[i]=new SampleFormat [wlength[i]];
for (int j=0;j<wlength[i];j++) {
if (whl[i].sample_format)
wf[i][j]=((unsigned char*)waveform[i])[j];
else
wf[i][j]=(waveform[i])[j];
}
Waveform *w=new Waveform(qint64(start)*1000L,wc[i],wf[i],wlength[i],qint64(wdur[i])*1000L,-128,128); //FlowRate
session->AddWaveform(w);
wlength[i]=0;
wdur[i]=0;
}
start=timestamp;
corrupt=0;
}
}
pos+=hl+1;
//qDebug() << (duration*num_signals*whl[0].interleave) << length-(hl+3);
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++) {
wf[i]=new SampleFormat [wlength[i]];
for (int j=0;j<wlength[i];j++) {
if (whl[i].sample_format)
wf[i][j]=((unsigned char*)waveform[i])[j];
else
wf[i][j]=(waveform[i])[j];
}
Waveform *w=new Waveform(qint64(start)*1000L,wc[i],wf[i],wlength[i],qint64(wdur[i])*1000L,-128,128); //FlowRate
session->AddWaveform(w);
}
int froog=3;
/* file.read(headerbytes,sizeof(PRS1Header));
file.read(waveheaderbytes,sizeof(PRS1Header));
int ns=waveheader.num_signals;
WaveHeaderList ws[ns];
char * wsc=&ws[0];
file.read(wsc,waveheader.num_signals*3);
chksum8=0;
for (int i=0;i<15;i++) chksum8+=headerbytes[i];
for (int i=0;i<5;i++) chksum8+=waveheaderbytes[i];
for (int i=0;i<waveheader.num_signals*3;i++) {
char *a=wsc;
chksum8+=a[i];
}
file.read((char *)&t8,1);
if (t8!=chksum8) {
qDebug() << "Mr T says \"Checksum doesn't match fool!\"";
}
qDebug() << "Reading Waveform " << header.sequence << header.extension << ":" << waveheader.duration << "seconds";
for (int i=0;i<ns;i++) {
qDebug() << ns << "signals" << "interleave=" << ws[i].interleave << ws[i].sample_format;
}
//file.read(m_buffer,
} while (!file.atEnd()); */
return true;
}
/*bool PRS1Loader::OldOpenWaveforms(Session *session,QString filename)
{
int size,sequence,seconds,br,htype,version,numsignals;
unsigned cnt=0;
@ -1014,25 +1188,29 @@ bool PRS1Loader::OpenWaveforms(Session *session,QString filename)
//qDebug() << "Wave: " << cnt << seconds;
} else {
qint32 diff=timestamp-expected_timestamp;
if (diff<0) {
if (duration>abs(diff)) {
duration+=diff; // really Subtracting..
samples+=diff*5;
} else {
qWarning() << "Waveform out of sync beyond the first entry" << sequence << duration << diff;
if (version==5) {
qWarning() << "ASV Waveform out of sync" << sequence << duration << diff << timestamp-lastts;
} else {
if (diff<0) {
if (duration>abs(diff)) {
duration+=diff; // really Subtracting..
samples+=diff*5;
} else {
qWarning() << "Waveform out of sync beyond the first entry" << sequence << duration << diff;
}
} else if (diff>0) {
qDebug() << "Fixing up Waveform sync" << sequence;
for (int i=0;i<diff*5;i++) {
buffer[samples++]=0;
}
duration+=diff;
}
} else if (diff>0) {
qDebug() << "Fixing up Waveform sync" << sequence;
for (int i=0;i<diff*5;i++) {
buffer[samples++]=0;
}
duration+=diff;
}
//qDebug() << "Wave: " << cnt << seconds << diff;
}
expected_timestamp=timestamp+seconds;
expected_timestamp=timestamp+seconds*numsignals;
if (ext!=PRS1_WAVEFORM_FILE) {
if (cnt==0)
@ -1126,7 +1304,7 @@ bool PRS1Loader::OpenWaveforms(Session *session,QString filename)
}
return true;
}
*/
void InitModelMap()
{
ModelMap[34]="RemStar Pro with C-Flex+";

7
SleepLib/session.cpp
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@ -610,6 +610,7 @@ bool Session::LoadEvents(QString filename)
bool Session::StoreWaveforms(QString filename)
{
QFile file(filename);
file.open(QIODevice::WriteOnly);
@ -633,12 +634,15 @@ bool Session::StoreWaveforms(QString filename)
map<MachineCode,vector<Waveform *> >::iterator i;
vector<Waveform *>::iterator j;
int zz=0;
for (i=waveforms.begin(); i!=waveforms.end(); i++) {
qDebug() << "Storing Waveform" << zz++ << filename;
out << (quint16)i->first; // Machine Code
t16=i->second.size();
out << t16; // Number of (hopefully non-linear) waveform chunks
int chnk=0;
for (j=i->second.begin(); j!=i->second.end(); j++) {
qDebug() << "Storing Waveform Chunk" << chnk++;
Waveform &w=*(*j);
// 64bit number..
@ -656,6 +660,7 @@ bool Session::StoreWaveforms(QString filename)
//t8=0; // 0=signed, 1=unsigned, 2=float
// followed by sample data.
qDebug() << "Writing " << (*j)->samples() << "samples";
for (int k=0; k<(*j)->samples(); k++) out << w[k];
}
}

BIN
docs/PRS1 Data Format.odt
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2
mainwindow.cpp
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@ -79,7 +79,7 @@ MainWindow::MainWindow(QWidget *parent) :
if (!pref.Exists("LinkGraphMovement")) pref["LinkGraphMovement"]=true;
else ui->action_Link_Graphs->setChecked(pref["LinkGraphMovement"].toBool());
if (!pref.Exists("ShowDebug")) pref["ShowDebug"]=false;
if (!pref.Exists("ShowDebug")) pref["ShowDebug"]=true;
else ui->actionDebug->setChecked(pref["ShowDebug"].toBool());
if (!pref["ShowDebug"].toBool()) {