atom_url.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"
- MP4UrlAtom::MP4UrlAtom()
- : MP4Atom("url ")
- {
- AddVersionAndFlags();
- AddProperty(new MP4StringProperty("location"));
- }
- void MP4UrlAtom::Read()
- {
- // read the version and flags properties
- ReadProperties(0, 2);
- // check if self-contained flag is set
- if (!(GetFlags() & 1)) {
- // if not then read url location
- ReadProperties(2);
- }
- Skip(); // to end of atom
- }
- void MP4UrlAtom::Write()
- {
- MP4StringProperty* pLocationProp =
- (MP4StringProperty*)m_pProperties[2];
- // if no url location has been set
- // then set self-contained flag
- // and don't attempt to write anything
- if (pLocationProp->GetValue() == NULL) {
- SetFlags(GetFlags() | 1);
- pLocationProp->SetImplicit(true);
- } else {
- SetFlags(GetFlags() & 0xFFFFFE);
- pLocationProp->SetImplicit(false);
- }
- // write atom as usual
- MP4Atom::Write();
- }