std::map<id_timecode_t, uint64_t>
cues_c::calculate_block_positions(KaxCluster &cluster)
const {
std::map<id_timecode_t, uint64_t> positions;
for (auto child : cluster) {
auto simple_block = dynamic_cast<KaxSimpleBlock *>(child);
if (simple_block) {
simple_block->SetParent(cluster);
positions[ id_timecode_t{ simple_block->TrackNum(), simple_block->GlobalTimecode() } ] = simple_block->GetElementPosition();
continue;
}
auto block_group = dynamic_cast<KaxBlockGroup *>(child);
if (!block_group)
continue;
auto block = FindChild<KaxBlock>(block_group);
if (!block)
continue;
block->SetParent(cluster);
positions[ id_timecode_t{ block->TrackNum(), block->GlobalTimecode() } ] = block->GetElementPosition();
}
return positions;
}
uint64 KaxCluster::GetBlockGlobalTimecode(int16 GlobalSavedTimecode)
{
if (!bFirstFrameInside) {
KaxClusterTimecode * Timecode = static_cast<KaxClusterTimecode *>(this->FindElt(EBML_INFO(KaxClusterTimecode)));
assert (bFirstFrameInside); // use the InitTimecode() hack for now
MinTimecode = MaxTimecode = PreviousTimecode = *static_cast<EbmlUInteger *>(Timecode);
bFirstFrameInside = true;
bPreviousTimecodeIsSet = true;
}
return int64(GlobalSavedTimecode * GlobalTimecodeScale()) + GlobalTimecode();
}
/*!
\brief retrieve the relative
\todo !!! We need a way to know the TimecodeScale
*/
int16 KaxCluster::GetBlockLocalTimecode(uint64 aGlobalTimecode) const
{
int64 TimecodeDelay = (int64(aGlobalTimecode) - int64(GlobalTimecode())) / int64(GlobalTimecodeScale());
assert(TimecodeDelay >= int16(0x8000) && TimecodeDelay <= int16(0x7FFF));
return int16(TimecodeDelay);
}
/*!
\todo only put the Blocks written in the cue entries
*/
filepos_t KaxCluster::Render(IOCallback & output, KaxCues & CueToUpdate, bool bSaveDefault)
{
filepos_t Result = 0;
size_t Index;
EBML_MASTER_ITERATOR TrkItr, Itr;
// update the Timecode of the Cluster before writing
KaxClusterTimecode * Timecode = static_cast<KaxClusterTimecode *>(this->FindElt(EBML_INFO(KaxClusterTimecode)));
*static_cast<EbmlUInteger *>(Timecode) = GlobalTimecode() / GlobalTimecodeScale();
if (Blobs.size() == 0) {
// old-school direct KaxBlockGroup
// SilentTracks handling
// check the parent cluster for existing tracks and see if they are contained in this cluster or not
if (bSilentTracksUsed) {
KaxTracks & MyTracks = *static_cast<KaxTracks *>(ParentSegment->FindElt(EBML_INFO(KaxTracks)));
for (TrkItr = MyTracks.begin(); TrkItr != MyTracks.end(); ++TrkItr) {
if (EbmlId(*(*TrkItr)) == EBML_ID(KaxTrackEntry)) {
KaxTrackEntry & entry = *static_cast<KaxTrackEntry *>(*TrkItr);
uint32 tracknum = entry.TrackNumber();
for (Itr = begin(); Itr != end(); ++Itr) {
if (EbmlId(*(*Itr)) == EBML_ID(KaxBlockGroup)) {
KaxBlockGroup & group = *static_cast<KaxBlockGroup *>(*Itr);
if (group.TrackNumber() == tracknum)
break; // this track is used
}
}
// the track wasn't found in this cluster
if (Itr == end()) {
KaxClusterSilentTracks * SilentTracks = static_cast<KaxClusterSilentTracks *>(this->FindFirstElt(EBML_INFO(KaxClusterSilentTracks)));
assert(SilentTracks != NULL); // the flag bSilentTracksUsed should be set when creating the Cluster
KaxClusterSilentTrackNumber * trackelt = static_cast<KaxClusterSilentTrackNumber *>(SilentTracks->AddNewElt(EBML_INFO(KaxClusterSilentTrackNumber)));
*static_cast<EbmlUInteger *>(trackelt) = tracknum;
}
}
}
}
Result = EbmlMaster::Render(output, bSaveDefault);
// For all Blocks add their position on the CueEntry
for (Itr = begin(); Itr != end(); ++Itr) {
if (EbmlId(*(*Itr)) == EBML_ID(KaxBlockGroup)) {
CueToUpdate.PositionSet(*static_cast<const KaxBlockGroup *>(*Itr));
}
}
} else {
// new school, using KaxBlockBlob
for (Index = 0; Index<Blobs.size(); Index++) {
#if MATROSKA_VERSION >= 2
if (Blobs[Index]->IsSimpleBlock())
PushElement( (KaxSimpleBlock&) *Blobs[Index] );
else
#endif
PushElement( (KaxBlockGroup&) *Blobs[Index] );
}
// SilentTracks handling
// check the parent cluster for existing tracks and see if they are contained in this cluster or not
if (bSilentTracksUsed) {
KaxTracks & MyTracks = *static_cast<KaxTracks *>(ParentSegment->FindElt(EBML_INFO(KaxTracks)));
for (TrkItr = MyTracks.begin(); TrkItr != MyTracks.end(); ++TrkItr) {
if (EbmlId(*(*TrkItr)) == EBML_ID(KaxTrackEntry)) {
KaxTrackEntry & entry = *static_cast<KaxTrackEntry *>(*TrkItr);
uint32 tracknum = entry.TrackNumber();
for (Index = 0; Index<Blobs.size(); Index++) {
if (((KaxInternalBlock&)*Blobs[Index]).TrackNum() == tracknum)
break; // this track is used
}
// the track wasn't found in this cluster
if (Index == ListSize()) {
KaxClusterSilentTracks * SilentTracks = static_cast<KaxClusterSilentTracks *>(this->FindFirstElt(EBML_INFO(KaxClusterSilentTracks)));
assert(SilentTracks != NULL); // the flag bSilentTracksUsed should be set when creating the Cluster
KaxClusterSilentTrackNumber * trackelt = static_cast<KaxClusterSilentTrackNumber *>(SilentTracks->AddNewElt(EBML_INFO(KaxClusterSilentTrackNumber)));
*static_cast<EbmlUInteger *>(trackelt) = tracknum;
}
}
}
}
Result = EbmlMaster::Render(output, bSaveDefault);
// For all Blocks add their position on the CueEntry
for (Index = 0; Index<Blobs.size(); Index++) {
CueToUpdate.PositionSet(*Blobs[Index]);
}
Blobs.clear();
}
return Result;
}
