mirror of
https://github.com/axiomatic-systems/Bento4.git
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144 lines
5.0 KiB
C++
144 lines
5.0 KiB
C++
/*****************************************************************
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| AP4 - iKMS 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 "Ap4IkmsAtom.h"
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#include "Ap4Utils.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_IkmsAtom)
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::Create
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+---------------------------------------------------------------------*/
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AP4_IkmsAtom*
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AP4_IkmsAtom::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_IkmsAtom(size, version, flags, stream);
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}
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::AP4_IkmsAtom
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+---------------------------------------------------------------------*/
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AP4_IkmsAtom::AP4_IkmsAtom(const char* kms_uri,
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AP4_UI32 kms_id,
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AP4_UI32 kms_version) :
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AP4_Atom(AP4_ATOM_TYPE_IKMS, AP4_FULL_ATOM_HEADER_SIZE, 0, 0),
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m_KmsUri(kms_uri),
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m_KmsId(kms_id),
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m_KmsVersion(kms_version)
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{
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m_Size32 += m_KmsUri.GetLength()+1;
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}
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::AP4_IkmsAtom
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+---------------------------------------------------------------------*/
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AP4_IkmsAtom::AP4_IkmsAtom(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_IKMS, size, version, flags)
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{
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AP4_Size string_size = size-AP4_FULL_ATOM_HEADER_SIZE;
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if (m_Version == 1 && string_size >= 8) {
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string_size -= 8;
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stream.ReadUI32(m_KmsId);
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stream.ReadUI32(m_KmsVersion);
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} else {
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m_KmsId = 0;
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m_KmsVersion = 0;
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}
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if (string_size) {
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char* str = new char[string_size];
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stream.Read(str, string_size);
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str[string_size-1] = '\0'; // force null-termination
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m_KmsUri = str;
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delete[] str;
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}
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}
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::Clone
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+---------------------------------------------------------------------*/
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AP4_Atom*
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AP4_IkmsAtom::Clone()
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{
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return new AP4_IkmsAtom(m_KmsUri.GetChars(), m_KmsId, m_KmsVersion);
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}
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::WriteFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_IkmsAtom::WriteFields(AP4_ByteStream& stream)
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{
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// handler version 1
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if (m_Version == 1) {
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stream.WriteUI32(m_KmsId);
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stream.WriteUI32(m_KmsVersion);
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}
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// kms uri
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AP4_Result result = stream.Write(m_KmsUri.GetChars(), m_KmsUri.GetLength()+1);
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if (AP4_FAILED(result)) return result;
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// pad with zeros if necessary
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AP4_Size padding = m_Size32-(AP4_FULL_ATOM_HEADER_SIZE+m_KmsUri.GetLength()+1);
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if (m_Version == 1) padding-=8;
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while (padding--) stream.WriteUI08(0);
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return AP4_SUCCESS;
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}
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/*----------------------------------------------------------------------
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| AP4_IkmsAtom::InspectFields
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+---------------------------------------------------------------------*/
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AP4_Result
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AP4_IkmsAtom::InspectFields(AP4_AtomInspector& inspector)
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{
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if (m_Version == 1) {
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char id[5];
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AP4_FormatFourChars(id, m_KmsId);
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inspector.AddField("kms_id", id);
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inspector.AddField("kms_version", m_KmsVersion);
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}
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inspector.AddField("kms_uri", m_KmsUri.GetChars());
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return AP4_SUCCESS;
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}
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