atom_elst.cpp
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:2k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * 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"
- MP4ElstAtom::MP4ElstAtom()
- : MP4Atom("elst")
- {
- AddVersionAndFlags();
- MP4Integer32Property* pCount =
- new MP4Integer32Property("entryCount");
- AddProperty(pCount);
- MP4TableProperty* pTable = new MP4TableProperty("entries", pCount);
- AddProperty(pTable);
- }
- void MP4ElstAtom::AddProperties(u_int8_t version)
- {
- MP4TableProperty* pTable = (MP4TableProperty*)m_pProperties[3];
- if (version == 1) {
- pTable->AddProperty(
- new MP4Integer64Property("segmentDuration"));
- pTable->AddProperty(
- new MP4Integer64Property("mediaTime"));
- } else {
- pTable->AddProperty(
- new MP4Integer32Property("segmentDuration"));
- pTable->AddProperty(
- new MP4Integer32Property("mediaTime"));
- }
- pTable->AddProperty(
- new MP4Integer16Property("mediaRate"));
- pTable->AddProperty(
- new MP4Integer16Property("reserved"));
- }
- void MP4ElstAtom::Generate()
- {
- SetVersion(0);
- AddProperties(GetVersion());
- MP4Atom::Generate();
- }
- void MP4ElstAtom::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
- }