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|
/*****************************************************************
|
| AP4 - iKMS Atoms
|
| Copyright 2002-2008 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 "Ap4IkmsAtom.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| dynamic cast support
+---------------------------------------------------------------------*/
AP4_DEFINE_DYNAMIC_CAST_ANCHOR(AP4_IkmsAtom)
/*----------------------------------------------------------------------
| AP4_IkmsAtom::Create
+---------------------------------------------------------------------*/
AP4_IkmsAtom*
AP4_IkmsAtom::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_IkmsAtom(size, version, flags, stream);
}
/*----------------------------------------------------------------------
| AP4_IkmsAtom::AP4_IkmsAtom
+---------------------------------------------------------------------*/
AP4_IkmsAtom::AP4_IkmsAtom(const char* kms_uri,
AP4_UI32 kms_id,
AP4_UI32 kms_version) :
AP4_Atom(AP4_ATOM_TYPE_IKMS, AP4_FULL_ATOM_HEADER_SIZE, 0, 0),
m_KmsUri(kms_uri),
m_KmsId(kms_id),
m_KmsVersion(kms_version)
{
m_Size32 += m_KmsUri.GetLength()+1;
}
/*----------------------------------------------------------------------
| AP4_IkmsAtom::AP4_IkmsAtom
+---------------------------------------------------------------------*/
AP4_IkmsAtom::AP4_IkmsAtom(AP4_UI32 size,
AP4_UI08 version,
AP4_UI32 flags,
AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_IKMS, size, version, flags)
{
AP4_Size string_size = size-AP4_FULL_ATOM_HEADER_SIZE;
if (m_Version == 1 && string_size >= 8) {
string_size -= 8;
stream.ReadUI32(m_KmsId);
stream.ReadUI32(m_KmsVersion);
} else {
m_KmsId = 0;
m_KmsVersion = 0;
}
if (string_size) {
char* str = new char[string_size];
stream.Read(str, string_size);
str[string_size-1] = '\0'; // force null-termination
m_KmsUri = str;
delete[] str;
}
}
/*----------------------------------------------------------------------
| AP4_IkmsAtom::Clone
+---------------------------------------------------------------------*/
AP4_Atom*
AP4_IkmsAtom::Clone()
{
return new AP4_IkmsAtom(m_KmsUri.GetChars(), m_KmsId, m_KmsVersion);
}
/*----------------------------------------------------------------------
| AP4_IkmsAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_IkmsAtom::WriteFields(AP4_ByteStream& stream)
{
// handler version 1
if (m_Version == 1) {
stream.WriteUI32(m_KmsId);
stream.WriteUI32(m_KmsVersion);
}
// kms uri
AP4_Result result = stream.Write(m_KmsUri.GetChars(), m_KmsUri.GetLength()+1);
if (AP4_FAILED(result)) return result;
// pad with zeros if necessary
AP4_Size padding = m_Size32-(AP4_FULL_ATOM_HEADER_SIZE+m_KmsUri.GetLength()+1);
if (m_Version == 1) padding-=8;
while (padding--) stream.WriteUI08(0);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_IkmsAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_IkmsAtom::InspectFields(AP4_AtomInspector& inspector)
{
if (m_Version == 1) {
char id[5];
AP4_FormatFourChars(id, m_KmsId);
inspector.AddField("kms_id", id);
inspector.AddField("kms_version", m_KmsVersion);
}
inspector.AddField("kms_uri", m_KmsUri.GetChars());
return AP4_SUCCESS;
}
|
