atom_ftyp.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"
- MP4FtypAtom::MP4FtypAtom()
- : MP4Atom("ftyp")
- {
- MP4StringProperty* pProp = new MP4StringProperty("majorBrand");
- pProp->SetFixedLength(4);
- AddProperty(pProp); /* 0 */
- AddProperty( /* 1 */
- new MP4Integer32Property("minorVersion"));
- MP4Integer32Property* pCount =
- new MP4Integer32Property("compatibleBrandsCount");
- pCount->SetImplicit();
- AddProperty(pCount); /* 2 */
- MP4TableProperty* pTable =
- new MP4TableProperty("compatibleBrands", pCount);
- AddProperty(pTable); /* 3 */
- pProp = new MP4StringProperty("brand");
- pProp->SetFixedLength(4);
- pTable->AddProperty(pProp);
- }
- void MP4FtypAtom::Generate()
- {
- MP4Atom::Generate();
- ((MP4StringProperty*)m_pProperties[0])->SetValue("isom");
- MP4StringProperty* pBrandProperty = (MP4StringProperty*)
- ((MP4TableProperty*)m_pProperties[3])->GetProperty(0);
- ASSERT(pBrandProperty);
- pBrandProperty->AddValue("mp41");
- ((MP4Integer32Property*)m_pProperties[2])->IncrementValue();
- }
- void MP4FtypAtom::Read()
- {
- // table entry count computed from atom size
- ((MP4Integer32Property*)m_pProperties[2])->SetReadOnly(false);
- ((MP4Integer32Property*)m_pProperties[2])->SetValue((m_size - 8) / 4);
- ((MP4Integer32Property*)m_pProperties[2])->SetReadOnly(true);
- MP4Atom::Read();
- }