directshow帮助文档学习笔记之directshow base classes - zhangxinbin的专栏 - csdnblog.htm

directshow的开发过程的详细介绍

  <TR style="mso-yfti-irow: 5">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cbaserendererclass.htm"><STRONG>CBaseRenderer</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Base 
      class for <SPAN class=SpellE>renderer</SPAN> filters. The input pin for 
      this class is <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/crendererinputpinclass.htm"><STRONG>CRendererInputPin</STRONG></A>.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 6; mso-yfti-lastrow: yes">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cbasevideorendererclass.htm"><STRONG>CBaseVideoRenderer</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Base 
      class for video <SPAN class=SpellE>renderers</SPAN>. This class derives 
      from <SPAN 
      class=SpellE><STRONG>CBaseRenderer</STRONG></SPAN>.<O:P></O:P></SPAN></P></TD></TR></TBODY></TABLE>
<P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
align=left><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal 
style="TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" 
align=left><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">To 
use these classes, you must derive your own class and write code to support the 
functionality that is specific to your <A title=Filter 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A>. 
The more specialized the base class, the less code you will need to write in 
your derived class.<O:P></O:P></SPAN></P>
<P class=MsoNormal 
style="TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" 
align=left><STRONG><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Helper 
Objects</SPAN></STRONG><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><O:P></O:P></SPAN></P>
<P class=MsoNormal 
style="TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" 
align=left><SPAN lang=EN-US 
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">The 
following classes implement helper objects that are used by filters and pins. 
<SPAN style="COLOR: fuchsia">Most of these classes can be used without deriving 
new classes from them:</SPAN><O:P></O:P></SPAN></P>
<TABLE class=MsoNormalTable 
style="mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt; mso-cellspacing: 1.5pt" 
cellPadding=0 border=0>
  <TBODY>
  <TR style="mso-yfti-irow: 0">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><STRONG><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Class</SPAN></STRONG><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><STRONG><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Description</SPAN></STRONG><SPAN 
      lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 1">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cpullpinclass.htm"><STRONG>CPullPin</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Helper 
      object for input pins on parser filters. Supports <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/iasyncreaderinterface.htm"><STRONG>IAsyncReader</STRONG></A> 
      connections with pull sources.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 2">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/coutputqueueclass.htm"><STRONG>COutputQueue</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Helper 
      object for output pins that queue samples for delivery on a worker 
      thread.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 3">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/csourceseekingclass.htm"><STRONG>CSourceSeeking</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Help 
      object for implementing seeking on a source <A title=Filter 
      href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A> 
      with exactly one output pin. (This class is not designed for filters with 
      multiple pins, such as parsers.)<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 4">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cenumpinsclass.htm"><STRONG>CEnumPins</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Enumerator 
      object for enumerating pins on a <A title=Filter 
      href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A>. 
      Implements the <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/ienumpinsinterface.htm"><STRONG>IEnumPins</STRONG></A> 
      interface.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 5">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cenummediatypesclass.htm"><STRONG>CEnumMediaTypes</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Enumerator 
      object for enumerating preferred media types on a pin. Implements the <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/ienummediatypesinterface.htm"><STRONG>IEnumMediaTypes</STRONG></A> 
      interface.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 6">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cmemallocatorclass.htm"><STRONG>CMemAllocator</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Memory 
      <SPAN class=SpellE>allocator</SPAN> object. Implements the <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/imemallocatorinterface.htm"><STRONG>IMemAllocator</STRONG></A> 
      interface.<O:P></O:P></SPAN></P></TD></TR>
  <TR style="mso-yfti-irow: 7">
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/cmediasampleclass.htm"><STRONG>CMediaSample</STRONG></A><O:P></O:P></SPAN></P></TD>
    <TD 
    style="PADDING-RIGHT: 3.75pt; PADDING-LEFT: 3.75pt; PADDING-BOTTOM: 3.75pt; PADDING-TOP: 3.75pt" 
    vAlign=top>
      <P class=MsoNormal style="TEXT-ALIGN: left; mso-pagination: widow-orphan" 
      align=left><SPAN lang=EN-US 
      style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Media 
      sample object. Implements the <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/imediasample2interface.htm"><STRONG>IMediaSample2</STRONG></A>