void ParseSamples(const Indices& samples, Builder& builder) const
{
Dbg("Samples: %1% to parse", samples.Count());
const std::size_t samplesTable = fromLE(Source.SamplesOffset);
for (Indices::Iterator it = samples.Items(); it; ++it)
{
const uint_t samIdx = *it;
Dbg("Parse sample %1%", samIdx);
const std::size_t samOffset = ReadWord(samplesTable, samIdx);
Sample result;
ParseSample(samOffset, result);
builder.SetSample(samIdx, result);
}
}
HRESULT CHdmvSub::ParseSample(IMediaSample* pSample)
{
CheckPointer(pSample, E_POINTER);
HRESULT hr;
REFERENCE_TIME rtStart = INVALID_TIME, rtStop = INVALID_TIME;
BYTE* pData = NULL;
int lSampleLen;
hr = pSample->GetPointer(&pData);
if (FAILED(hr) || pData == NULL) {
return hr;
}
lSampleLen = pSample->GetActualDataLength();
pSample->GetTime(&rtStart, &rtStop);
return ParseSample(pData, lSampleLen, rtStart, rtStop);
}
void CPGSSubFile::ParseFile(CString fn)
{
CFile f;
if (!f.Open(fn, CFile::modeRead | CFile::shareDenyWrite)) {
return;
}
// Header: Sync code | start time | stop time | segment type | segment size
std::array < BYTE, 2 + 2 * 4 + 1 + 2 > header;
const int nExtraSize = 1 + 2; // segment type + segment size
std::vector<BYTE> segBuff;
while (!m_bStopParsing && f.Read(header.data(), (UINT)header.size()) == header.size()) {
// Parse the header
CGolombBuffer headerBuffer(header.data(), (int)header.size());
if (WORD(headerBuffer.ReadShort()) != PGS_SYNC_CODE) {
break;
}
REFERENCE_TIME rtStart = REFERENCE_TIME(headerBuffer.ReadDword()) * 1000 / 9;
REFERENCE_TIME rtStop = REFERENCE_TIME(headerBuffer.ReadDword()) * 1000 / 9;
headerBuffer.ReadByte(); // segment type
WORD wLenSegment = (WORD)headerBuffer.ReadShort();
// Leave some room to add the segment type and size
int nLenData = nExtraSize + wLenSegment;
segBuff.resize(nLenData);
memcpy(segBuff.data(), &header[header.size() - nExtraSize], nExtraSize);
// Read the segment
if (wLenSegment && f.Read(&segBuff[nExtraSize], wLenSegment) != wLenSegment) {
break;
}
// Parse the data (even if the segment size is 0 because the header itself is important)
TRACE_PGSSUB(_T("--------- CPGSSubFile::ParseFile rtStart=%s, rtStop=%s, len=%d ---------\n"),
ReftimeToString(rtStart), ReftimeToString(rtStop), nLenData);
ParseSample(rtStart, rtStop, segBuff.data(), nLenData);
}
}
HRESULT CPGSSub::ParseSample(IMediaSample* pSample)
{
CheckPointer(pSample, E_POINTER);
BYTE* pData = nullptr;
HRESULT hr = pSample->GetPointer(&pData);
if (FAILED(hr) || !pData) {
return hr;
}
int lSampleLen = pSample->GetActualDataLength();
REFERENCE_TIME rtStart = INVALID_TIME, rtStop = INVALID_TIME;
hr = pSample->GetTime(&rtStart, &rtStop);
if (FAILED(hr)) {
return hr;
}
TRACE_PGSSUB(_T("--------- CPGSSub::ParseSample rtStart=%s, rtStop=%s, len=%d ---------\n"),
ReftimeToString(rtStart + m_rtCurrentSegmentStart), ReftimeToString(rtStop + m_rtCurrentSegmentStart), lSampleLen);
return ParseSample(rtStart, rtStop, pData, lSampleLen);
}