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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie dmackie@cisco.com
*/
#include "mp4common.h"
MP4MdhdAtom::MP4MdhdAtom()
: MP4Atom("mdhd")
{
AddVersionAndFlags();
}
void MP4MdhdAtom::AddProperties(u_int8_t version)
{
if (version == 1) {
AddProperty(
new MP4Integer64Property("creationTime"));
AddProperty(
new MP4Integer64Property("modificationTime"));
} else {
AddProperty(
new MP4Integer32Property("creationTime"));
AddProperty(
new MP4Integer32Property("modificationTime"));
}
AddProperty(
new MP4Integer32Property("timeScale"));
if (version == 1) {
AddProperty(
new MP4Integer64Property("duration"));
} else {
AddProperty(
new MP4Integer32Property("duration"));
}
AddProperty(
new MP4Integer16Property("language"));
AddReserved("reserved", 2);
}
void MP4MdhdAtom::Generate()
{
u_int8_t version = m_pFile->Use64Bits(GetType()) ? 1 : 0;
SetVersion(version);
AddProperties(version);
MP4Atom::Generate();
// set creation and modification times
MP4Timestamp now = MP4GetAbsTimestamp();
if (version == 1) {
((MP4Integer64Property*)m_pProperties[2])->SetValue(now);
((MP4Integer64Property*)m_pProperties[3])->SetValue(now);
} else {
((MP4Integer32Property*)m_pProperties[2])->SetValue(now);
((MP4Integer32Property*)m_pProperties[3])->SetValue(now);
}
}
void MP4MdhdAtom::Read()
{
/* read atom version */
ReadProperties(0, 1);
/* need to create the properties based on the atom version */
AddProperties(GetVersion());
/* now we can read the remaining properties */
ReadProperties(1);
Skip(); // to end of atom
}
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