odcommands.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:3k
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"
- MP4ODUpdateDescriptor::MP4ODUpdateDescriptor()
- : MP4Descriptor(MP4ODUpdateODCommandTag)
- {
- // just a container for ObjectDescriptors
- AddProperty( /* 0 */
- new MP4DescriptorProperty(NULL,
- MP4FileODescrTag, 0, Required, Many));
- }
- MP4ODRemoveDescriptor::MP4ODRemoveDescriptor()
- : MP4Descriptor(MP4ODRemoveODCommandTag)
- {
- MP4Integer32Property* pCount =
- new MP4Integer32Property("entryCount");
- pCount->SetImplicit();
- AddProperty(pCount); /* 0 */
- MP4TableProperty* pTable =
- new MP4TableProperty("entries", pCount);
- AddProperty(pTable); /* 1 */
- pTable->AddProperty( /* 1, 0 */
- new MP4BitfieldProperty("objectDescriptorId", 10));
- }
- void MP4ODRemoveDescriptor::Read(MP4File* pFile)
- {
- // table entry count computed from descriptor size
- ((MP4Integer32Property*)m_pProperties[0])->SetReadOnly(false);
- ((MP4Integer32Property*)m_pProperties[0])->SetValue((m_size * 8) / 10);
- ((MP4Integer32Property*)m_pProperties[0])->SetReadOnly(true);
- MP4Descriptor::Read(pFile);
- }
- MP4ESUpdateDescriptor::MP4ESUpdateDescriptor()
- : MP4Descriptor(MP4ESUpdateODCommandTag)
- {
- AddProperty( /* 0 */
- new MP4BitfieldProperty("objectDescriptorId", 10));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("pad", 6));
- AddProperty( /* 2 */
- new MP4DescriptorProperty("esIdRefs",
- MP4ESIDRefDescrTag, 0, Required, Many));
- }
- // LATER might be able to combine with ESUpdateDescriptor
- MP4ESRemoveDescriptor::MP4ESRemoveDescriptor()
- : MP4Descriptor(MP4ESRemoveODCommandTag)
- {
- AddProperty( /* 0 */
- new MP4BitfieldProperty("objectDescriptorId", 10));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("pad", 6));
- AddProperty( /* 2 */
- new MP4DescriptorProperty("esIdRefs",
- MP4ESIDRefDescrTag, 0, Required, Many));
- }
- MP4Descriptor* CreateODCommand(u_int8_t tag)
- {
- MP4Descriptor* pDescriptor = NULL;
- switch (tag) {
- case MP4ODUpdateODCommandTag:
- pDescriptor = new MP4ODUpdateDescriptor();
- break;
- case MP4ODRemoveODCommandTag:
- pDescriptor = new MP4ODRemoveDescriptor();
- break;
- case MP4ESUpdateODCommandTag:
- pDescriptor = new MP4ESUpdateDescriptor();
- break;
- case MP4ESRemoveODCommandTag:
- pDescriptor = new MP4ESRemoveDescriptor();
- break;
- }
- return pDescriptor;
- }