ref: 4dfc6c8fa70d3109591a1f51cf0d8a7849aeb4dd
dir: /common/mp4v2/atom_mdhd.cpp/
/* * 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 [email protected] */ #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() ? 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 }