atom_stsz.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"
- MP4StszAtom::MP4StszAtom()
- : MP4Atom("stsz")
- {
- AddVersionAndFlags(); /* 0, 1 */
- AddProperty( /* 2 */
- new MP4Integer32Property("sampleSize"));
- MP4Integer32Property* pCount =
- new MP4Integer32Property("sampleCount");
- AddProperty(pCount); /* 3 */
- MP4TableProperty* pTable = new MP4TableProperty("entries", pCount);
- AddProperty(pTable); /* 4 */
- pTable->AddProperty( /* 4/0 */
- new MP4Integer32Property("sampleSize"));
- }
- void MP4StszAtom::Read()
- {
- ReadProperties(0, 4);
- u_int32_t sampleSize =
- ((MP4Integer32Property*)m_pProperties[2])->GetValue();
- // only attempt to read entries table if sampleSize is zero
- // i.e sample size is not constant
- m_pProperties[4]->SetImplicit(sampleSize != 0);
- ReadProperties(4);
- Skip(); // to end of atom
- }
- void MP4StszAtom::Write()
- {
- u_int32_t sampleSize =
- ((MP4Integer32Property*)m_pProperties[2])->GetValue();
- // only attempt to write entries table if sampleSize is zero
- // i.e sample size is not constant
- m_pProperties[4]->SetImplicit(sampleSize != 0);
- MP4Atom::Write();
- }