295 lines
12 KiB
HTML
295 lines
12 KiB
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<link rel=File-List href="readme_files/filelist.xml">
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<title>ADDITIONAL INFORMATION TO THE SAMPLE The private property is
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exposed as a filter property</title>
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<o:DocumentProperties>
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<o:Author>Frank Berreth</o:Author>
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<o:LastAuthor>Frank Berreth</o:LastAuthor>
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<o:Revision>8</o:Revision>
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<o:TotalTime>104</o:TotalTime>
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<o:Created>2001-05-10T16:58:00Z</o:Created>
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</head>
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<body lang=EN-US link=blue vlink=purple style='tab-interval:.5in'>
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<div class=Section1>
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<h2><span style='font-family:Verdana'>Audio Property Page Sample<o:p></o:p></span></h2>
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<p><span style='font-size:10.0pt;font-family:Arial;color:red'>[This is
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preliminary documentation and subject to change.]</span><span style='font-size:
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10.0pt;font-family:Verdana'><o:p></o:p></span></p>
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<h3><span style='font-family:Verdana'>SUMMARY<o:p></o:p></span></h3>
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<p><span style='font-size:10.0pt;font-family:Verdana'>This sample demonstrates the
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basics of writing an audio property page, and can be used as a base to write
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your own property page. The sample only works together with the AC97 WDM audio
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sample driver which runs on an Intel<65> motherboard with integrated AC97
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controller, like the Intel 810 Chipset.<o:p></o:p></span></p>
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<p><span style='font-size:10.0pt;font-family:Verdana'>After you install the
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audio driver together with this sample, the property page will appear when you
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open the device manager and click on the properties for the AC97 WDM audio
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sample driver. Instead of having the usual property sheets, you will see an
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additional property sheet called <20>Features<65> which will display some AC97 codec
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features.<o:p></o:p></span></p>
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<h3><span style='font-family:Verdana'>BUILDING THE SAMPLE<o:p></o:p></span></h3>
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<p><span style='font-size:10.0pt;font-family:Verdana'>To build this sample,
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enter any Windows .NET or Windows XP build environment and run <b>build</b><b
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style='mso-bidi-font-weight:normal'> <20><span class=SpellE><span class=GramE>cZ</span></span></b>
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from the AC97 directory (parent directory). This would also compile the AC97
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WDM audio driver sample that is needed for this sample to work.<o:p></o:p></span></p>
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<p><span style='font-size:10.0pt;font-family:Verdana'>The INF named
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<EFBFBD>AC97smpl.inf<6E> included in the AC97 subdirectory (parent directory) can be used
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to install the sample after it has been built. Simply copy the INF and this
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sample binary and the AC97 driver binary to a floppy disk and then update the
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driver for the device with the one from the floppy. <o:p></o:p></span></p>
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<p><span style='font-size:10.0pt;font-family:Verdana'>Once the driver has been
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installed with the INF, the property page sample may be updated by copying the
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binary into %SystemRoot%\System32 on the target machine, provided that there
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are no INF changes.<o:p></o:p></span></p>
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<h3><span style='font-family:Verdana'>SAMPLE ISSUES<o:p></o:p></span></h3>
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<h3><span style='font-size:10.0pt;mso-bidi-font-size:13.5pt;font-family:Verdana;
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font-weight:normal'>This sample only works with </span><span style='font-size:
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10.0pt;font-family:Verdana;font-weight:normal'>Microsoft<66> Windows<77> 2000 (or
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higher)</span><span style='font-size:10.0pt;font-family:Verdana'> </span><span
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style='font-size:10.0pt;font-family:Verdana;font-weight:normal'>operating
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system. If you want to run this sample on Microsoft<66> Windows<77> ME for example,
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you need to modify the INF file and write a <span class=SpellE>thunk</span>-layer
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for the property page since the device manager makes 16-bit calls into the
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property page sample.</span><span style='font-size:10.0pt;mso-bidi-font-size:
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13.5pt;font-family:Verdana;font-weight:normal'><o:p></o:p></span></h3>
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<p><b><span style='font-size:13.5pt;mso-bidi-font-size:12.0pt;font-family:Verdana'>ADDITIONAL
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INFORMATION TO THE SAMPLE<o:p></o:p></span></b></p>
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<p><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana'>The
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property page sample communicates with the AC97 WDM audio driver sample through
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a private property. The DLL then fills all dialog fields with the information
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received from the audio driver. The private property is defined in the header
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file <20><span class=SpellE>prvprop.h</span><EFBFBD>.<o:p></o:p></span></p>
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<p><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Verdana'>The
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private property is exposed in the audio driver as a filter property. As a
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result of this, we don't have to pass down a KSP_NODE structure but a
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KSPROPERTY structure (which is missing the node). Add properties to the
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topology filter if they are generic and not connected with a node.<br>
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<br>
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You can pass down additional information besides the KSPROPERTY structure.
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Whatever you add after the structure is passed to the topology handler. The
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"Instance" pointer points to the added data and the "<span
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class=SpellE>InstanceSize</span>" variable in the PPCPROPERTY_REQUEST
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structure contains the additional buffer length. The output buffer that was
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passed in the <span class=SpellE>DeviceIoControl</span> call is the
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"Value" pointer (and "<span class=SpellE>ValueSize</span>"
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variable).<br>
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<br>
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<span class=GramE>Use node properties (define your own GUID, attach that to the
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node like the KSPROPSETID_AUDIO is attached to for example volume nodes) if the
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property changes values of that node (special 3d node for example).</span> Make
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sure you specify KSPROPERTY_TYPE_TOPOLOGY when you talk with a node and pass at
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least a KSP_NODE structure down. Everything passed after KSP_NODE is again
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accessible with the "Instance" and "<span class=SpellE>InstanceSize</span>"
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variables.<o:p></o:p></span></p>
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<h3><span lang=FR style='font-family:Verdana;mso-ansi-language:FR'>CODE TOUR<o:p></o:p></span></h3>
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<h4><span lang=FR style='font-family:Verdana;mso-ansi-language:FR'>File
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Manifest<o:p></o:p></span></h4>
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<pre><u><span lang=FR style='mso-ansi-language:FR'>File<span style='mso-tab-count:
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2'><3E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>Description<o:p></o:p></span></u></pre><pre><span lang=FR
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style='mso-ansi-language:FR'><o:p> </o:p></span></pre><pre>AC97prop.cpp<span
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style='mso-tab-count:1'><3E><> </span>Includes all the code necessary for the sample</pre><pre>AC97prop.def<span
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style='mso-tab-count:1'><3E><> </span>To build the DLL</pre><pre>AC97prop.rc<span
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style='mso-tab-count:1'><3E><><EFBFBD> </span>Property sheet definition</pre><pre><span
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class=SpellE>Makefile</span><span style='mso-tab-count:1'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>Standard Windows NT <span
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class=SpellE>makefile</span></pre><pre>Readme.htm<span style='mso-tab-count:
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1'><3E><><EFBFBD><EFBFBD> </span>This file</pre><pre><span class=SpellE>Resource.h</span><span
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style='mso-tab-count:1'><3E><><EFBFBD><EFBFBD> </span>Needed for the property sheet definition</pre><pre>Sources<span
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style='mso-tab-count:2'><3E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>Dependency information for compiling</pre><pre><span
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class=SpellE>Version.h</span><span style='mso-tab-count:1'><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> </span>Version information</pre><pre><o:p> </o:p></pre>
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<p align=center style='margin:0in;margin-bottom:.0001pt;text-align:center;
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tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
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style='font-size:10.0pt;font-family:"Courier New";mso-fareast-font-family:"Courier New"'><a
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href="#top"><span style='font-family:Verdana'>Top of page</span></a></span><span
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style='font-size:10.0pt;font-family:Verdana;mso-fareast-font-family:"Courier New";
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mso-bidi-font-family:"Courier New"'> <o:p></o:p></span></p>
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<pre><o:p> </o:p></pre>
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<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=624
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style='width:6.5in;mso-cellspacing:0in;mso-padding-alt:0in 0in 0in 0in'>
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<tr style='mso-yfti-irow:0;mso-yfti-lastrow:yes;height:1.5pt'>
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<td style='background:aqua;padding:.75pt .75pt .75pt .75pt;height:1.5pt'>
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<p class=MsoNormal><o:p> </o:p></p>
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</td>
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</tr>
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</table>
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<pre><o:p> </o:p></pre><pre><o:p> </o:p></pre>
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<p style='margin:0in;margin-bottom:.0001pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
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style='font-size:7.5pt;font-family:"MS Sans Serif";mso-fareast-font-family:
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"Courier New";mso-bidi-font-family:"Courier New"'><3E> Microsoft Corporation 1999</span><span
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style='font-size:10.0pt;font-family:Verdana;mso-fareast-font-family:"Courier New";
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mso-bidi-font-family:"Courier New"'> <o:p></o:p></span></p>
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