directshow帮助文档学习笔记之directshow event notification codes - zhangxinbin的专栏 - csdnblog.htm

directshow的开发过程的详细介绍

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<DIV class=Section1 style="LAYOUT-GRID:  15.6pt none">
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style="TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 1" 
align=center><STRONG><SPAN lang=EN-US 
style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt"><A 
title=DirectShow 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A> 
Event Notification Codes<O:P></O:P></SPAN></STRONG></P>
<P class=MsoNormal 
style="TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 1" 
align=left><A name=eventnotificationcodes></A><A 
name=dvdeventnotificationcodes></A><STRONG><SPAN lang=EN-US 
style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt">DVD 
Event Notification Codes<O:P></O:P></SPAN></STRONG></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; COLOR: fuchsia; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Note&nbsp;&nbsp;&nbsp;</SPAN></STRONG><SPAN 
lang=EN-US 
style="FONT-SIZE: 12pt; COLOR: fuchsia; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">This 
introductory material applies only to C++ developers. <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; COLOR: fuchsia; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Microsoft® 
<A title=DirectShow 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/DirectShow">DirectShow</A>® 
supports system-defined events, which filters in the <A title=Filter 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A> <A 
title=Graph 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A> pass 
to the <A title=Filter 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A> <A 
title=Graph 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A> 
manager. Filters pass these events to the <A title=Filter 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Filter">Filter</A> <A 
title=Graph 
href="http://blog.csdn.net/zhangxinbin/archive/2006/10/22/Graph">Graph</A> 
manager by using the <A 
href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/imediaeventsinknotify.htm"><STRONG><SPAN 
style="COLOR: fuchsia">IMediaEventSink::Notify</SPAN></STRONG></A> method, and 
the application retrieves them with the <A 
href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/imediaeventgetevent.htm"><STRONG><SPAN 
style="COLOR: fuchsia">IMediaEvent::GetEvent</SPAN></STRONG></A> method. 
<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">When 
you retrieve an event by calling <SPAN 
class=SpellE><STRONG>GetEvent</STRONG></SPAN>, the event can contain interface 
pointers or pointers to allocated memory. Code that uses <SPAN 
class=SpellE><STRONG>GetEvent</STRONG></SPAN> should, therefore, call <A 
href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/imediaeventfreeeventparams.htm"><STRONG>IMediaEvent::FreeEventParams</STRONG></A> 
to free any resources associated with the event's parameters after it handles 
the event. <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 
DVD event notification codes are listed in <SPAN class=SpellE>Dvdevcod.h</SPAN>. 
See <A 
href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/eventnotificationcodes.htm">Event 
Notification Codes</A> for non-DVD event notification codes. The following list 
shows the available DVD event notification codes in alphabetical order. 
<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" 
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  <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">DVD 
      event notification code</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/ec_dvd_angle_change.htm">EC_DVD_ANGLE_CHANGE</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">Signals 
      that either the number of available angles changed or that the current 
      angle number changed. <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/ec_dvd_angles_available.htm">EC_DVD_ANGLES_AVAILABLE</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">Indicates 
      whether an angle block is being played and angle changes can be performed. 
      <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/ec_dvd_audio_stream_change.htm">EC_DVD_AUDIO_STREAM_CHANGE</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">Signals 
      that the current audio stream number changed for the main title. 
      <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/ec_dvd_button_auto_activated.htm">EC_DVD_BUTTON_AUTO_ACTIVATED</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">Signals 
      that a menu button has been automatically activated per instructions on 
      the disc. <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/ec_dvd_button_change.htm">EC_DVD_BUTTON_CHANGE</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">Signals 
      that either the number of available buttons changed or that the currently 
      selected button number changed. <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/ec_dvd_chapter_autostop.htm">EC_DVD_CHAPTER_AUTOSTOP</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">Indicates 
      that playback stopped as the result of a call to the <A 
      href="mk:@MSITStore:C:\DXSDK\Doc\DirectX9\DirectX9_c.chm::/directx/htm/idvdcontrol2playchaptersautostop.htm"><STRONG>IDvdControl2::PlayChaptersAutoStop</STRONG></A> 
      method. <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/ec_dvd_chapter_start.htm">EC_DVD_CHAPTER_START</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">Signals 
      that the DVD Navigator started playback of a new chapter in the current 
      title. <O:P></O:P></SPAN></P></TD></TR>