HRESULT CStreamParser::ParsePlanarPCM(Packet *pPacket)
{
CMediaType mt = m_pPin->GetActiveMediaType();
WORD nChannels = 0, nBPS = 0, nBlockAlign = 0;
audioFormatTypeHandler(mt.Format(), mt.FormatType(), nullptr, &nChannels, &nBPS, &nBlockAlign, nullptr);
// Mono needs no special handling
if (nChannels == 1)
return Queue(pPacket);
Packet *out = new Packet();
out->CopyProperties(pPacket);
out->SetDataSize(pPacket->GetDataSize());
int nBytesPerChannel = nBPS / 8;
int nAudioBlocks = pPacket->GetDataSize() / nChannels;
BYTE *out_data = out->GetData();
const BYTE *in_data = pPacket->GetData();
for (int i = 0; i < nAudioBlocks; i += nBytesPerChannel) {
// interleave the channels into audio blocks
for (int c = 0; c < nChannels; c++) {
memcpy(out_data + (c * nBytesPerChannel), in_data + (nAudioBlocks * c), nBytesPerChannel);
}
// Skip to the next output block
out_data += nChannels * nBytesPerChannel;
// skip to the next input sample
in_data += nBytesPerChannel;
}
return Queue(out);
}
Packet* CClip::GenerateSparseVideo(REFERENCE_TIME rtStart)
{
Packet * ret = NULL;
if (!SparseVideoAvailable() && m_vecClipVideoPackets.size()==0) return ret;
if (m_pSparseVideoPacket != NULL)
{
if (m_vecClipVideoPackets.size()>0)
{
Packet * pBDPacket = m_vecClipVideoPackets[0];
if (m_pSparseVideoPacket->rtStart + ONE_SECOND > pBDPacket->rtStart)
{
ivecVideoBuffers it = m_vecClipVideoPackets.begin();
if ((*it)->rtStart !=Packet::INVALID_TIME)
{
delete m_pSparseVideoPacket;
m_pSparseVideoPacket=*it;
it=m_vecClipVideoPackets.erase(it);
}
else
{
it=m_vecClipVideoPackets.erase(it);
if (!m_vecClipVideoPackets.size()) sparseVideo = false;
return *it;
}
}
else
{
m_pSparseVideoPacket->rtStart += HALF_SECOND/5;
m_pSparseVideoPacket->rtStop += HALF_SECOND/5;
m_pSparseVideoPacket->bFakeData = true;
}
}
else
{
m_pSparseVideoPacket->rtStart += HALF_SECOND/5;
m_pSparseVideoPacket->rtStop += HALF_SECOND/5;
m_pSparseVideoPacket->bFakeData = true;
}
ret = new Packet();
ret->SetData(m_pSparseVideoPacket->GetData(),m_pSparseVideoPacket->GetDataSize());
ret->CopyProperties(*m_pSparseVideoPacket);
}
else
{
if (m_vecClipVideoPackets.size()>0)
{
ivecVideoBuffers it = m_vecClipVideoPackets.begin();
if ((*it)->rtStart !=Packet::INVALID_TIME)
{
m_pSparseVideoPacket=*it;
it=m_vecClipVideoPackets.erase(it);
ret = new Packet();
ret->SetData(m_pSparseVideoPacket->GetData(),m_pSparseVideoPacket->GetDataSize());
ret->CopyProperties(*m_pSparseVideoPacket);
}
else
{
it=m_vecClipVideoPackets.erase(it);
if (!m_vecClipVideoPackets.size()) sparseVideo = false;
return *it;
}
}
}
return ret;
}