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|
/*****************************************************************
|
| AP4 - pdin 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 "Ap4PdinAtom.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| AP4_PdinAtom::Create
+---------------------------------------------------------------------*/
AP4_PdinAtom*
AP4_PdinAtom::Create(AP4_Size size, AP4_ByteStream& stream)
{
AP4_UI08 version;
AP4_UI32 flags;
if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
if (version > 1) return NULL;
return new AP4_PdinAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_PdinAtom::AP4_PdinAtom
+---------------------------------------------------------------------*/
AP4_PdinAtom::AP4_PdinAtom() :
AP4_Atom(AP4_ATOM_TYPE_PDIN, AP4_FULL_ATOM_HEADER_SIZE, 0, 0)
{
}
/*----------------------------------------------------------------------
| AP4_PdinAtom::AddEntry
+---------------------------------------------------------------------*/
AP4_Result
AP4_PdinAtom::AddEntry(AP4_UI32 rate, AP4_UI32 initial_delay)
{
Entry entry;
entry.m_Rate = rate;
entry.m_InitialDelay = initial_delay;
m_Entries.Append(entry);
SetSize(AP4_FULL_ATOM_HEADER_SIZE+m_Entries.ItemCount()*8);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_PdinAtom::AP4_PdinAtom
+---------------------------------------------------------------------*/
AP4_PdinAtom::AP4_PdinAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_PDIN, size, version, flags)
{
AP4_UI32 entry_count = (size-AP4_FULL_ATOM_HEADER_SIZE)/8;
m_Entries.SetItemCount(entry_count);
for (unsigned int i=0; i<entry_count; i++) {
stream.ReadUI32(m_Entries[i].m_Rate);
stream.ReadUI32(m_Entries[i].m_InitialDelay);
}
}
/*----------------------------------------------------------------------
| AP4_PdinAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_PdinAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
for (unsigned int i=0; i<m_Entries.ItemCount(); i++) {
result = stream.WriteUI32(m_Entries[i].m_Rate);
if (AP4_FAILED(result)) return result;
result = stream.WriteUI32(m_Entries[i].m_InitialDelay);
if (AP4_FAILED(result)) return result;
}
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_PdinAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_PdinAtom::InspectFields(AP4_AtomInspector& inspector)
{
char header[32];
for (AP4_Ordinal i=0; i<m_Entries.ItemCount(); i++) {
AP4_FormatString(header, sizeof(header), "rate(%d)", i);
inspector.AddField(header, m_Entries[i].m_Rate);
AP4_FormatString(header, sizeof(header), "initial_delay(%d)", i);
inspector.AddField(header, m_Entries[i].m_InitialDelay);
}
return AP4_SUCCESS;
}
|
