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Jef 2024-09-24 14:54:57 +02:00
parent 537bcbc862
commit fc06254474
16440 changed files with 4239995 additions and 2 deletions
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Src/external_dependencies/libmp4v2/atom_mvhd.cpp Normal file
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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"
MP4MvhdAtom::MP4MvhdAtom()
: MP4Atom("mvhd")
{
AddVersionAndFlags();
}
void MP4MvhdAtom::AddProperties(u_int8_t version)
{
if (version == 1) {
AddProperty( /* 2 */
new MP4Integer64Property("creationTime"));
AddProperty( /* 3 */
new MP4Integer64Property("modificationTime"));
} else {
AddProperty( /* 2 */
new MP4Integer32Property("creationTime"));
AddProperty( /* 3 */
new MP4Integer32Property("modificationTime"));
}
AddProperty( /* 4 */
new MP4Integer32Property("timeScale"));
if (version == 1) {
AddProperty( /* 5 */
new MP4Integer64Property("duration"));
} else {
AddProperty( /* 5 */
new MP4Integer32Property("duration"));
}
MP4Float32Property* pProp;
pProp = new MP4Float32Property("rate");
pProp->SetFixed32Format();
AddProperty(pProp); /* 6 */
pProp = new MP4Float32Property("volume");
pProp->SetFixed16Format();
AddProperty(pProp); /* 7 */
AddReserved("reserved1", 70); /* 8 */
AddProperty( /* 9 */
new MP4Integer32Property("nextTrackId"));
}
void MP4MvhdAtom::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);
}
((MP4Integer32Property*)m_pProperties[4])->SetValue(1000);
((MP4Float32Property*)m_pProperties[6])->SetValue(1.0);
((MP4Float32Property*)m_pProperties[7])->SetValue(1.0);
// property reserved has non-zero fixed values
static u_int8_t reserved[70] = {
0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x40, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
m_pProperties[8]->SetReadOnly(false);
((MP4BytesProperty*)m_pProperties[8])->
SetValue(reserved, sizeof(reserved));
m_pProperties[8]->SetReadOnly(true);
// set next track id
((MP4Integer32Property*)m_pProperties[9])->SetValue(1);
}
void MP4MvhdAtom::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
}