mirror of
https://github.com/axiomatic-systems/Bento4.git
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131 lines
4.9 KiB
C++
131 lines
4.9 KiB
C++
/*****************************************************************
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| AP4 - Ainf Atoms
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| Copyright 2002-2012 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 "Ap4AinfAtom.h"
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#include "Ap4Utils.h"
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/*----------------------------------------------------------------------
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| AP4_AinfAtom Dynamic Cast Anchor
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+---------------------------------------------------------------------*/
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AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_AinfAtom)
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/*----------------------------------------------------------------------
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| constants
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+---------------------------------------------------------------------*/
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const unsigned int AP4_AINF_MAX_OTHER_SIZE = 16*1024*1024; // 16MB, for sanity
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/*----------------------------------------------------------------------
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| AP4_AinfAtom::Create
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+---------------------------------------------------------------------*/
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AP4_AinfAtom*
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AP4_AinfAtom::Create(AP4_Size size, AP4_ByteStream& stream)
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{
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AP4_UI08 version;
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AP4_UI32 flags;
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if (size < AP4_FULL_ATOM_HEADER_SIZE) return NULL;
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if (AP4_FAILED(AP4_Atom::ReadFullHeader(stream, version, flags))) return NULL;
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if (version > 1) return NULL;
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return new AP4_AinfAtom(size, version, flags, stream);
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}
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/*----------------------------------------------------------------------
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| AP4_AinfAtom::AP4_AinfAtom
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+---------------------------------------------------------------------*/
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AP4_AinfAtom::AP4_AinfAtom() :
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AP4_Atom(AP4_ATOM_TYPE_AINF, AP4_FULL_ATOM_HEADER_SIZE+4+1, 0, 0)
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{
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}
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/*----------------------------------------------------------------------
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| AP4_AinfAtom::AP4_AinfAtom
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+---------------------------------------------------------------------*/
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AP4_AinfAtom::AP4_AinfAtom(AP4_UI32 size,
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AP4_UI08 version,
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AP4_UI32 flags,
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AP4_ByteStream& stream) :
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AP4_Atom(AP4_ATOM_TYPE_AINF, size, version, flags)
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{
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stream.ReadUI32(m_ProfileVersion);
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if (size > AP4_FULL_ATOM_HEADER_SIZE+4 && size < AP4_AINF_MAX_OTHER_SIZE) {
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AP4_DataBuffer payload;
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unsigned int payload_size = size-AP4_FULL_ATOM_HEADER_SIZE-4;
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payload.SetDataSize(payload_size+1);
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payload.UseData()[payload_size] = 0;
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stream.Read(payload.UseData(), payload_size);
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m_APID = (const char*)payload.GetData();
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if (payload_size > m_APID.GetLength()+1) {
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unsigned int other_boxes_size = payload_size-m_APID.GetLength()-1;
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m_OtherBoxes.SetDataSize(other_boxes_size);
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AP4_CopyMemory(m_OtherBoxes.UseData(), payload.GetData(), other_boxes_size);
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}
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}
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}
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/*----------------------------------------------------------------------
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| AP4_AinfAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_AinfAtom::WriteFields(AP4_ByteStream& stream)
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{
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AP4_Result result;
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result = stream.WriteUI32(m_ProfileVersion);
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if (AP4_FAILED(result)) return result;
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// stop early if we have an atom with no APID and a declared size
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// that doesn't leave enough room for the NULL terminator
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if (GetSize() <= AP4_FULL_ATOM_HEADER_SIZE+4) return AP4_SUCCESS;
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result = stream.Write(m_APID.GetChars(), m_APID.GetLength()+1);
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if (AP4_FAILED(result)) return result;
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if (m_OtherBoxes.GetDataSize()) {
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stream.Write(m_OtherBoxes.GetData(), m_OtherBoxes.GetDataSize());
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}
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_AinfAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_AinfAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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char v[5];
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AP4_FormatFourChars(v, m_ProfileVersion);
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v[4] = 0;
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inspector.AddField("profile_version", v);
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inspector.AddField("APID", m_APID.GetChars());
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return AP4_SUCCESS;
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}
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