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|
/*****************************************************************
|
| AP4 - sdp 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 "Ap4RtpAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Utils.h"
/*----------------------------------------------------------------------
| AP4_RtpAtom::AP4_RtpAtom
+---------------------------------------------------------------------*/
AP4_RtpAtom::AP4_RtpAtom(AP4_UI32 size, AP4_ByteStream& stream) :
AP4_Atom(AP4_ATOM_TYPE_RTP_, size)
{
// desc format
stream.ReadUI32(m_DescriptionFormat);
// sdptext
int str_size = size-(AP4_ATOM_HEADER_SIZE+4);
if (str_size) {
char* str = new char[str_size+1];
stream.Read(str, str_size);
str[str_size] = '\0'; // force null-termination
m_SdpText = str;
delete[] str;
}
}
/*----------------------------------------------------------------------
| AP4_RtpAtom::WriteFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_RtpAtom::WriteFields(AP4_ByteStream& stream)
{
AP4_Result result;
// description format
result = stream.WriteUI32(m_DescriptionFormat);
if (AP4_FAILED(result)) return result;
// sdp text
result = stream.Write(m_SdpText.GetChars(), m_SdpText.GetLength());
if (AP4_FAILED(result)) return result;
// pad with zeros if necessary
AP4_Size padding = m_Size32-(AP4_ATOM_HEADER_SIZE+4+m_SdpText.GetLength());
while (padding--) stream.WriteUI08(0);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_RtpAtom::InspectFields
+---------------------------------------------------------------------*/
AP4_Result
AP4_RtpAtom::InspectFields(AP4_AtomInspector& inspector)
{
char format_string[5];
AP4_FormatFourChars(format_string, m_DescriptionFormat);
inspector.AddField("description_format", format_string);
inspector.AddField("sdp_text", m_SdpText.GetChars());
return AP4_SUCCESS;
}
|
