📄 directshow帮助文档学习笔记之directshow帮助文档学习总结 - zhangxinbin的专栏 - csdnblog.htm
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lang=EN-US><SPAN style="mso-tab-count: 1"><FONT face="Times New Roman"
size=3> </FONT></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><SPAN
style="mso-tab-count: 1">
</SPAN>Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Class</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=Filter
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三者是相互关联的。</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">向应用程序提供</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=Filter
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的入口，</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Class</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">则实现了</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的暴露函数，从而实现了</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=Filter
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的功能。也可以说</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Class</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">构成了</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=Filter
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。在</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Class</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=Filter
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">就是相互关联的。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><SPAN
style="mso-tab-count: 1"> </SPAN><A
title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">很多来自</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman"><A title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A>
Objects</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，特别是那些常用的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。至于其他的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来自哪里还不清楚，谁知道请告诉我。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><SPAN
style="mso-tab-count: 1"> </SPAN><A
title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A>
Objects</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供了</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">8</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Objects</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，其中最重</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt">要的两个是</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Capture
<A title=Graph
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A>
Builder和Filter <A title=Graph
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A>
Manager。Filter <A title=Graph
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A>
Manager提供了很多常用的Interface。<O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal
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lang=EN-US><O:P><FONT face="Times New Roman" size=3></FONT></O:P></SPAN></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><A title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中提供的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">大都继承自</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IUnknown</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，如</SPAN><STRONG><SPAN
lang=EN-US><FONT
face="Times New Roman">ICaptureGraphBuilder2</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IEnumFilters</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IEnumMediaTypes</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">IEnumPins</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IFilterChain</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IFilterGraph</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IGraphConfig</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IMediaSeeking</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IMediaSample</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US style="mso-bidi-font-weight: bold"><FONT
face="Times New Roman">IMediaSample2</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IMemAllocator</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IMemInputPin</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">ISampleGrabber</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等等。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><STRONG><SPAN lang=EN-US><FONT
face="Times New Roman">IGraphBuilder</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">继承自</SPAN><STRONG><SPAN
lang=EN-US><FONT face="Times New Roman">IFilterGraph
</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，而</SPAN><STRONG><SPAN
lang=EN-US><FONT
face="Times New Roman">IFilterGraph2</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">继承自</SPAN><STRONG><SPAN
lang=EN-US><FONT
face="Times New Roman">IGraphBuilder</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN><STRONG><SPAN
lang=EN-US><O:P></O:P></SPAN></STRONG></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><A title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中提供的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有些继承自</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IDispatch</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，如</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IBasicAudio</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IBasicVideo</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IMediaControl</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IMediaEvent</FONT></SPAN></STRONG><STRONG
style="mso-bidi-font-weight: normal"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN
lang=EN-US><FONT
face="Times New Roman">IMediaPosition</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等等，</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><STRONG style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IBasicVideo2</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">继承自</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IBasicVideo</FONT></SPAN></STRONG><SPAN lang=EN-US><FONT
face="Times New Roman"> </FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IMediaEventEx</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">继承自</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IMediaEvent</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 7.8pt 0cm; mso-para-margin-top: .5gd; mso-para-margin-right: 0cm; mso-para-margin-bottom: .5gd; mso-para-margin-left: 0cm"><FONT
size=3><SPAN lang=EN-US><FONT face="Times New Roman"><SPAN
style="mso-tab-count: 1"> </SPAN><A
title=DirectShow
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A></FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中提供的</SPAN><SPAN
lang=EN-US><FONT face="Times New Roman">Interface</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">继承自</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IPersist</FONT></SPAN></STRONG><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的是</SPAN><STRONG
style="mso-bidi-font-weight: normal"><SPAN lang=EN-US><FONT
face="Times New Roman">IMediaFilter</FONT></SPAN></STRONG><SPAN
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