mirror of
https://github.com/axiomatic-systems/Bento4.git
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137 lines
4.6 KiB
C++
137 lines
4.6 KiB
C++
/*****************************************************************
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| AP4 - moov Atoms
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| Copyright 2002-2008 Axiomatic Systems, LLC
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| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
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| Unless you have obtained Bento4 under a difference license,
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| this version of Bento4 is Bento4|GPL.
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| Bento4|GPL is free software; you can redistribute it and/or modify
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| it under the terms of the GNU General Public License as published by
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| the Free Software Foundation; either version 2, or (at your option)
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| any later version.
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| Bento4|GPL is distributed in the hope that it will be useful,
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| but WITHOUT ANY WARRANTY; without even the implied warranty of
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| GNU General Public License for more details.
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| You should have received a copy of the GNU General Public License
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| along with Bento4|GPL; see the file COPYING. If not, write to the
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| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 02111-1307, USA.
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****************************************************************/
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/*----------------------------------------------------------------------
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| includes
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+---------------------------------------------------------------------*/
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#include "Ap4MoovAtom.h"
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#include "Ap4TrakAtom.h"
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#include "Ap4AtomFactory.h"
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/*----------------------------------------------------------------------
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| dynamic cast support
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+---------------------------------------------------------------------*/
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AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_MoovAtom)
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/*----------------------------------------------------------------------
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| AP4_TrakAtomCollector
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+---------------------------------------------------------------------*/
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class AP4_TrakAtomCollector : public AP4_List<AP4_Atom>::Item::Operator
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{
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public:
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AP4_TrakAtomCollector(AP4_List<AP4_TrakAtom>* track_atoms) :
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m_TrakAtoms(track_atoms) {}
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AP4_Result Action(AP4_Atom* atom) const {
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if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
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AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
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if (trak) {
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m_TrakAtoms->Add(trak);
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}
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}
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return AP4_SUCCESS;
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}
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private:
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AP4_List<AP4_TrakAtom>* m_TrakAtoms;
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};
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/*----------------------------------------------------------------------
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| AP4_MoovAtom::AP4_MoovAtom
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+---------------------------------------------------------------------*/
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AP4_MoovAtom::AP4_MoovAtom() :
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AP4_ContainerAtom(AP4_ATOM_TYPE_MOOV),
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m_TimeScale(0)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_MoovAtom::AP4_MoovAtom
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+---------------------------------------------------------------------*/
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AP4_MoovAtom::AP4_MoovAtom(AP4_UI32 size,
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AP4_ByteStream& stream,
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AP4_AtomFactory& atom_factory) :
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AP4_ContainerAtom(AP4_ATOM_TYPE_MOOV, size, false, stream, atom_factory),
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m_TimeScale(0)
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{
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// collect all trak atoms
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m_Children.Apply(AP4_TrakAtomCollector(&m_TrakAtoms));
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}
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/*----------------------------------------------------------------------
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| AP4_MoovAtom::AdjustChunkOffsets
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_MoovAtom::AdjustChunkOffsets(AP4_SI64 offset)
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{
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for (AP4_List<AP4_TrakAtom>::Item* item = m_TrakAtoms.FirstItem();
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item;
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item = item->GetNext()) {
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AP4_TrakAtom* trak = item->GetData();
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trak->AdjustChunkOffsets(offset);
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_MoovAtom::OnChildAdded
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+---------------------------------------------------------------------*/
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void
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AP4_MoovAtom::OnChildAdded(AP4_Atom* atom)
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{
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// keep the atom in the list of trak atoms
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if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
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AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
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if (trak) {
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m_TrakAtoms.Add(trak);
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}
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}
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// call the base class implementation
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AP4_ContainerAtom::OnChildAdded(atom);
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}
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/*----------------------------------------------------------------------
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| AP4_MoovAtom::OnChildRemoved
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+---------------------------------------------------------------------*/
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void
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AP4_MoovAtom::OnChildRemoved(AP4_Atom* atom)
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{
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// remove the atom from the list of trak atoms
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if (atom->GetType() == AP4_ATOM_TYPE_TRAK) {
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AP4_TrakAtom* trak = AP4_DYNAMIC_CAST(AP4_TrakAtom, atom);
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if (trak) {
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m_TrakAtoms.Remove(trak);
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}
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}
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// call the base class implementation
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AP4_ContainerAtom::OnChildRemoved(atom);
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}
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