/
Ap4SaioAtom.cpp
180 lines (166 loc) · 6.32 KB
/
Ap4SaioAtom.cpp
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/*****************************************************************
|
| AP4 - saio Atoms
|
| Copyright 2002-2011 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 "Ap4SaioAtom.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_SaioAtom)
/*----------------------------------------------------------------------
| AP4_SaioAtom::Create
+---------------------------------------------------------------------*/
AP4_SaioAtom*
AP4_SaioAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
AP4_UI08 version;
AP4_UI32 flags;
if (size < AP4_FULL_ATOM_HEADER_SIZE) return NULL;
if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
if (version > 1) return NULL;
return new AP4_SaioAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::AP4_SaioAtom
+---------------------------------------------------------------------*/
AP4_SaioAtom::AP4_SaioAtom() :
AP4_Atom(AP4_ATOM_TYPE_SAIO, AP4_FULL_ATOM_HEADER_SIZE+4, 0, 0),
m_AuxInfoType(0),
m_AuxInfoTypeParameter(0)
{
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::AddEntry
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaioAtom::AddEntry(AP4_UI64 offset)
{
m_Entries.Append(offset);
unsigned int extra = (m_Flags&1)?8:0;
SetSize(AP4_FULL_ATOM_HEADER_SIZE+extra+4+m_Entries.ItemCount()*(m_Version==0?4:8));
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::SetEntry
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaioAtom::SetEntry(AP4_Ordinal entry_index, AP4_UI64 offset)
{
if (m_Entries.ItemCount() <= entry_index) return AP4_ERROR_OUT_OF_RANGE;
m_Entries[entry_index] = offset;
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::AP4_SaioAtom
+---------------------------------------------------------------------*/
AP4_SaioAtom::AP4_SaioAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_SAIO, size, version, flags),
m_AuxInfoType(0),
m_AuxInfoTypeParameter(0)
{
AP4_SI32 remains = size-AP4_FULL_ATOM_HEADER_SIZE;
if (flags & 1) {
if (remains < 8) return;
stream.ReadUI32(m_AuxInfoType);
stream.ReadUI32(m_AuxInfoTypeParameter);
remains -= 8;
}
if (remains < 4) return;
AP4_UI32 entry_count = 0;
AP4_Result result = stream.ReadUI32(entry_count);
if (AP4_FAILED(result)) return;
remains -= 4;
if (remains < (AP4_UI64)entry_count*(m_Version==0?4:8)) {
return;
}
m_Entries.SetItemCount(entry_count);
for (unsigned int i=0; i<entry_count; i++) {
if (m_Version == 0) {
AP4_UI32 entry = 0;
result = stream.ReadUI32(entry);
if (AP4_FAILED(result)) return;
m_Entries[i] = entry;
} else {
AP4_UI64 entry = 0;
result = stream.ReadUI64(entry);
if (AP4_FAILED(result)) return;
m_Entries[i] = entry;
}
}
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaioAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
if (m_Flags&1) {
result = stream.WriteUI32(m_AuxInfoType);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_AuxInfoTypeParameter);
if (AP4_FAILED(result)) return result;
}
result = stream.WriteUI32(m_Entries.ItemCount());
if (AP4_FAILED(result)) return result;
for (unsigned int i=0; i<m_Entries.ItemCount(); i++) {
if (m_Version == 0) {
result = stream.WriteUI32((AP4_UI32)m_Entries[i]);
if (AP4_FAILED(result)) return result;
} else {
result = stream.WriteUI64(m_Entries[i]);
if (AP4_FAILED(result)) return result;
}
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_SaioAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_SaioAtom::InspectFields(AP4_AtomInspector& inspector)
{
if (m_Flags&1) {
inspector.AddField("aux info type", m_AuxInfoType, AP4_AtomInspector::HINT_HEX);
inspector.AddField("aux info type parameter", m_AuxInfoTypeParameter, AP4_AtomInspector::HINT_HEX);
}
inspector.AddField("entry_count", m_Entries.ItemCount());
if (inspector.GetVerbosity() >= 2) {
inspector.StartArray("entries", m_Entries.ItemCount());
for (AP4_Ordinal i=0; i<m_Entries.ItemCount(); i++) {
inspector.AddField(NULL, m_Entries[i]);
}
inspector.EndArray();
}
return AP4_SUCCESS;
}