/*----------------------------------------------------------------------
| AP4_FragmentSampleTable::AP4_FragmentSampleTable
+---------------------------------------------------------------------*/
AP4_FragmentSampleTable::AP4_FragmentSampleTable(AP4_ContainerAtom* traf,
AP4_TrexAtom* trex,
AP4_Cardinal internal_track_id,
AP4_ByteStream* sample_stream,
AP4_Position moof_offset,
AP4_Position mdat_payload_offset,
AP4_UI64 dts_origin)
:m_InternalTrackId(internal_track_id)
{
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD));
if (tfhd == NULL) return;
// count all the samples and reserve space for them
unsigned int sample_count = 0;
for (AP4_List<AP4_Atom>::Item* item = traf->GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, atom);
if (trun) sample_count += trun->GetEntries().ItemCount();
}
}
m_Samples.EnsureCapacity(sample_count);
// check if we have a timecode base
AP4_TfdtAtom* tfdt = AP4_DYNAMIC_CAST(AP4_TfdtAtom, traf->GetChild(AP4_ATOM_TYPE_TFDT));
if (tfdt) {
dts_origin = tfdt->GetBaseMediaDecodeTime();
}
// process all the trun atoms
for (AP4_List<AP4_Atom>::Item* item = traf->GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, atom);
if (trun) {
AP4_Result result = AddTrun(trun,
tfhd,
trex,
sample_stream,
moof_offset,
mdat_payload_offset,
dts_origin);
if (AP4_FAILED(result)) return;
}
}
}
}
/*----------------------------------------------------------------------
| AP4_Movie::ProcessMoof
+---------------------------------------------------------------------*/
void
AP4_Movie::ProcessMoof(AP4_ContainerAtom* moof, AP4_ByteStream& stream)
{
if (moof) {
AP4_Offset offset = 0;
stream.Tell(offset);
AP4_Offset moof_offset = offset - moof->GetSize();
AP4_Offset mdat_payload_offset = offset + 8;
AP4_MfhdAtom* mfhd = AP4_DYNAMIC_CAST(AP4_MfhdAtom, moof->GetChild(AP4_ATOM_TYPE_MFHD));
if (mfhd) {
for (AP4_List<AP4_Atom>::Item* item = moof->GetChildren().FirstItem();
item;
item = item->GetNext()) {
AP4_Atom* atom = item->GetData();
if (atom->GetType() == AP4_ATOM_TYPE_TRAF) {
AP4_ContainerAtom* traf = AP4_DYNAMIC_CAST(AP4_ContainerAtom, atom);
if (traf) {
AP4_TfhdAtom* tfhd = AP4_DYNAMIC_CAST(AP4_TfhdAtom, traf->GetChild(AP4_ATOM_TYPE_TFHD));
if (!tfhd) {
continue;
}
AP4_Track* track = GetTrack(tfhd->GetTrackId());
if (!track) {
continue;
}
AP4_TfdtAtom* tfdt = AP4_DYNAMIC_CAST(AP4_TfdtAtom, traf->GetChild(AP4_ATOM_TYPE_TFDT));
AP4_TrexAtom* trex = NULL;
AP4_ContainerAtom* mvex = AP4_DYNAMIC_CAST(AP4_ContainerAtom, m_MoovAtom->GetChild(AP4_ATOM_TYPE_MVEX));
if (mvex) {
for (AP4_List<AP4_Atom>::Item* child_item = mvex->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TREX) {
trex = AP4_DYNAMIC_CAST(AP4_TrexAtom, child_atom);
if (trex && trex->GetTrackId() == tfhd->GetTrackId()) break;
trex = NULL;
}
}
}
AP4_FragmentSampleTable* sampleTable = track->GetFragmentSampleTable();
AP4_Cardinal sample_count = 0;
for (AP4_List<AP4_Atom>::Item* child_item = traf->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, child_atom);
if (trun) {
sample_count += trun->GetEntries().ItemCount();
}
}
}
if (!sample_count) {
return;
}
if (sampleTable->GetSampleCount() == 0) {
track->CreateFragmentFromStdSamples();
}
if (AP4_FAILED(sampleTable->EnsureCapacity(sample_count + sampleTable->GetSampleCount()))) {
return;
}
AP4_UI64 dts_origin = tfdt ? tfdt->GetBaseMediaDecodeTime() : 0;
for (AP4_List<AP4_Atom>::Item* child_item = traf->GetChildren().FirstItem();
child_item;
child_item = child_item->GetNext()) {
AP4_Atom* child_atom = child_item->GetData();
if (child_atom->GetType() == AP4_ATOM_TYPE_TRUN) {
AP4_TrunAtom* trun = AP4_DYNAMIC_CAST(AP4_TrunAtom, child_atom);
if (trun) {
sampleTable->AddTrun(trun, tfhd, trex, stream, dts_origin, moof_offset, mdat_payload_offset);
}
}
}
}
}
}
}
}
}