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|
/*****************************************************************
|
| AP4 - moov Atoms
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4MoovAtom.h"
#include "Ap4TrakAtom.h"
#include "Ap4PsshAtom.h"
#include "Ap4AtomFactory.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_MoovAtom)
/*----------------------------------------------------------------------
| AP4_AtomCollector
+---------------------------------------------------------------------*/
class AP4_AtomCollector : public AP4_List<AP4_Atom>::Item::Operator
{
public:
AP4_AtomCollector(AP4_List<AP4_TrakAtom>* track_atoms, AP4_List<AP4_PsshAtom>* pssh_atoms) :
m_TrakAtoms(track_atoms), m_PsshAtoms(pssh_atoms) {}
AP4_Result Action(AP4_Atom* atom) const {
if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
if (trak) {
m_TrakAtoms->Add(trak);
}
}
else if (atom->GetType() == AP4_ATOM_TYPE_PSSH) {
AP4_PsshAtom* pssh = AP4_DYNAMIC_CAST(AP4_PsshAtom, atom);
if (pssh) {
m_PsshAtoms->Add(pssh);
}
}
return AP4_SUCCESS;
}
private:
AP4_List<AP4_TrakAtom>* m_TrakAtoms;
AP4_List<AP4_PsshAtom>* m_PsshAtoms;
};
/*----------------------------------------------------------------------
| AP4_MoovAtom::AP4_MoovAtom
+---------------------------------------------------------------------*/
AP4_MoovAtom::AP4_MoovAtom() :
AP4_ContainerAtom(AP4_ATOM_TYPE_MOOV),
m_TimeScale(0)
{
}
/*----------------------------------------------------------------------
| AP4_MoovAtom::AP4_MoovAtom
+---------------------------------------------------------------------*/
AP4_MoovAtom::AP4_MoovAtom(AP4_UI32 size,
AP4_ByteStream& stream,
AP4_AtomFactory& atom_factory) :
AP4_ContainerAtom(AP4_ATOM_TYPE_MOOV, size, false, stream, atom_factory),
m_TimeScale(0)
{
// collect all trak atoms
m_Children.Apply(AP4_AtomCollector(&m_TrakAtoms, &m_PsshAtoms));
}
/*----------------------------------------------------------------------
| AP4_MoovAtom::AdjustChunkOffsets
+---------------------------------------------------------------------*/
AP4_Result
AP4_MoovAtom::AdjustChunkOffsets(AP4_SI64 offset)
{
for (AP4_List<AP4_TrakAtom>::Item* item = m_TrakAtoms.FirstItem();
item;
item = item->GetNext()) {
AP4_TrakAtom* trak = item->GetData();
trak->AdjustChunkOffsets(offset);
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_MoovAtom::AddTrakAtoms
+---------------------------------------------------------------------*/
AP4_Result
AP4_MoovAtom::AddTrakAtoms(AP4_List<AP4_TrakAtom>& atoms, AP4_List<AP4_TrakAtom>::Item* &first_item)
{
//find the insert position (behind last existing track)
int current=0, insertPos = GetChildren().ItemCount();
for (AP4_List<AP4_Atom>::Item* item = GetChildren().FirstItem(); item; item = item->GetNext(), ++current)
if (item->GetData()->GetType() == AP4_ATOM_TYPE_TRAK)
insertPos = current + 1;
current = m_TrakAtoms.ItemCount();
for (AP4_List<AP4_TrakAtom>::Item *item(atoms.FirstItem()); item; item = item->GetNext())
AddChild(AP4_DYNAMIC_CAST(AP4_Atom, item->GetData())->Clone(),insertPos++);
for (first_item = m_TrakAtoms.FirstItem(); current; first_item = first_item->GetNext(), --current);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_MoovAtom::OnChildAdded
+---------------------------------------------------------------------*/
void
AP4_MoovAtom::OnChildAdded(AP4_Atom* atom)
{
// keep the atom in the list of trak atoms
if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
if (trak) {
m_TrakAtoms.Add(trak);
}
}
// keep the atom in the list of pssh atoms
if (atom->GetType() == AP4_ATOM_TYPE_PSSH) {
AP4_PsshAtom* pssh = AP4_DYNAMIC_CAST(AP4_PsshAtom, atom);
if (pssh) {
m_PsshAtoms.Add(pssh);
}
}
// call the base class implementation
AP4_ContainerAtom::OnChildAdded(atom);
}
/*----------------------------------------------------------------------
| AP4_MoovAtom::OnChildRemoved
+---------------------------------------------------------------------*/
void
AP4_MoovAtom::OnChildRemoved(AP4_Atom* atom)
{
// remove the atom from the list of trak atoms
if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
if (trak) {
m_TrakAtoms.Remove(trak);
}
}
// remove the atom from the list of pssh atoms
if (atom->GetType() == AP4_ATOM_TYPE_PSSH) {
AP4_PsshAtom* pssh = AP4_DYNAMIC_CAST(AP4_PsshAtom, atom);
if (pssh) {
m_PsshAtoms.Remove(pssh);
}
}
// call the base class implementation
AP4_ContainerAtom::OnChildRemoved(atom);
}
|
