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Split PRS1DataChunk::ReadHeader into ReadHeader/ReadWaveformHeader.

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This commit is contained in:
sawinglogz 2019-05-15 10:26:31 -04:00
parent e07c4ce63c
commit d3c6d6445b
2 changed files with 63 additions and 42 deletions
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101
oscar/SleepLib/loader_plugins/prs1_loader.cpp
View File

@ -3561,50 +3561,11 @@ bool PRS1DataChunk::ReadHeader(QFile & f)
}
this->m_headerblock = headerB2;
} else { // Waveform Chunk
QByteArray extra = f.read(5);
if (extra.size() != 5) {
qWarning() << this->m_path << "read error in waveform header";
} else { // Waveform Chunk
bool hdr_ok = ReadWaveformHeader(f);
if (!hdr_ok) {
break;
}
this->m_header.append(extra);
// Get the header address again to be safe
header = (unsigned char *)this->m_header.data();
this->duration = header[0x0f] | header[0x10] << 8;
int always_1 = header[0x11];
if (always_1 != 1) {
qWarning() << this->m_path << always_1 << "!= 1";
//break; // don't break to avoid changing behavior (for now)
}
quint16 wvfm_signals = header[0x12] | header[0x13] << 8;
int ws_size = (this->fileVersion == 3) ? 4 : 3;
int sbsize = wvfm_signals * ws_size;
extra = f.read(sbsize);
if (extra.size() != sbsize) {
qWarning() << this->m_path << "read error in waveform header 2";
break;
}
this->m_header.append(extra);
header = (unsigned char *)this->m_header.data();
// Read the waveform information in reverse. // TODO: Double-check this, always seems to be flow then pressure.
int pos = 0x14 + (wvfm_signals - 1) * ws_size;
for (int i = 0; i < wvfm_signals; ++i) {
quint16 interleave = header[pos] | header[pos + 1] << 8; // samples per block (Usually 05 00)
if (this->fileVersion == 2) {
quint8 sample_format = header[pos + 2]; // TODO: sample_format seems to be unused anywhere else in the loader.
this->waveformInfo.push_back(PRS1Waveform(interleave, sample_format));
pos -= 3;
} else if (this->fileVersion == 3) {
//quint16 sample_size = header[pos + 2] | header[pos + 3] << 8; // size in bits?? (08 00)
// Possibly this is size in bits, and sign bit for the other byte?
this->waveformInfo.push_back(PRS1Waveform(interleave, 0));
pos -= 4;
}
}
}
// The 8bit checksum comes at the end.
@ -3634,6 +3595,62 @@ bool PRS1DataChunk::ReadHeader(QFile & f)
}
bool PRS1DataChunk::ReadWaveformHeader(QFile & f)
{
bool ok = false;
unsigned char * header;
do {
QByteArray extra = f.read(5);
if (extra.size() != 5) {
qWarning() << this->m_path << "read error in waveform header";
break;
}
this->m_header.append(extra);
// Get the header address again to be safe
header = (unsigned char *)this->m_header.data();
this->duration = header[0x0f] | header[0x10] << 8;
int always_1 = header[0x11];
if (always_1 != 1) {
qWarning() << this->m_path << always_1 << "!= 1";
//break; // don't break to avoid changing behavior (for now)
}
quint16 wvfm_signals = header[0x12] | header[0x13] << 8;
int ws_size = (this->fileVersion == 3) ? 4 : 3;
int sbsize = wvfm_signals * ws_size;
extra = f.read(sbsize);
if (extra.size() != sbsize) {
qWarning() << this->m_path << "read error in waveform header 2";
break;
}
this->m_header.append(extra);
header = (unsigned char *)this->m_header.data();
// Read the waveform information in reverse. // TODO: Double-check this, always seems to be flow then pressure.
int pos = 0x14 + (wvfm_signals - 1) * ws_size;
for (int i = 0; i < wvfm_signals; ++i) {
quint16 interleave = header[pos] | header[pos + 1] << 8; // samples per block (Usually 05 00)
if (this->fileVersion == 2) {
quint8 sample_format = header[pos + 2]; // TODO: sample_format seems to be unused anywhere else in the loader.
this->waveformInfo.push_back(PRS1Waveform(interleave, sample_format));
pos -= 3;
} else if (this->fileVersion == 3) {
//quint16 sample_size = header[pos + 2] | header[pos + 3] << 8; // size in bits?? (08 00)
// Possibly this is size in bits, and sign bit for the other byte?
this->waveformInfo.push_back(PRS1Waveform(interleave, 0));
pos -= 4;
}
}
ok = true;
} while (false);
return ok;
}
bool PRS1DataChunk::ReadData(QFile & f)
{
bool ok = false;

4
oscar/SleepLib/loader_plugins/prs1_loader.h
View File

@ -115,6 +115,10 @@ public:
//! \brief Read the chunk's data from a PRS1 file and calculate its CRC, must be called after ReadHeader
bool ReadData(class QFile & f);
protected:
//! \brief Read and parse the waveform-specific header data from a PRS1 file
bool ReadWaveformHeader(class QFile & f);
};
class PRS1Loader;