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64 lines
2.3 KiB
64 lines
2.3 KiB
<HTML>
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<HEAD>
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-
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1252">
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<META NAME="Generator" CONTENT="Microsoft Word 97">
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<TITLE>Imaadpcm</TITLE>
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</HEAD>
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<BODY LINK="#0000ff">
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<FONT FACE="Verdana" SIZE=5><H2>Imaadpcm</H2>
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</FONT><FONT FACE="Verdana" SIZE=2>
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<P><span style="color:#FF0000;font-size:10pt;font-family:Arial">[This is preliminary
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documentation and subject to change.]</span></P>
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<H3>SUMMARY</H3></FONT><FONT FACE="Verdana" SIZE=2><P>
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Each of the three samples Msfilter, Msgsm610 and Imaadpcm illustrates an implementation of an Audio Compression Manager
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(ACM) software codec.
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This sample in particular
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contains encode and decode routines for the IMA's ADPCM
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format. This format is the same format used in Intel's DVI standard.
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Intel has made this algorithm public domain and the IMA has endorsed
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this format as a standard for audio compression.
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The sample works on both x86 and Alpha platforms. It is 64-bit compliant, but requires the addition of 64-bit
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headers before compilation. It builds properly with Microsoft® Visual C® 6.0.
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The sample does not support Plug and Play, Power Management, or On Now. These features are not applicable to ACM
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software codecs.
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<H3>BUILDING THE SAMPLE</H3></FONT><FONT FACE="Verdana"
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SIZE=2><P>
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Type <b>build</b> in the sample directory. A successful build produces the file Imaadp32.acm.
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<H3>CODE TOUR</H3>
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<H4>File Manifest</H4>
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</FONT><U><PRE>File		Description
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</U>
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Codec.c	 ACM driver interfaces
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Codec.h	 header file for Codec.c
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Codec.rc	string and dialog resources
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Codec.rcv	version resource
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Config.c	configuration dialog
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Debug.c	 debug utilities
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Debug.h	 header file for Debug.c
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Imaadpcm.c	the codec algorithm
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Imaadpcm.h	header file for Gsm610.c
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Muldiv32.h	math helper macros
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Imaadpcm.def	module definition file for linker
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Oemsetup.inf	sample installation file for the driver
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</FONT><P ALIGN="CENTER"><A HREF="#top"><FONT FACE="Verdana" SIZE=2>Top of
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page</FONT></A><FONT FACE="Verdana" SIZE=2> </P></FONT>
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<TABLE CELLSPACING=0 BORDER=0 WIDTH=624>
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<TR><TD VALIGN="MIDDLE" BGCOLOR="#00ffff" HEIGHT=2>
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<P></TD>
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</TR>
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</TABLE>
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<FONT FACE="MS Sans Serif" SIZE=1><P>© Microsoft Corporation 1999</FONT><FONT
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FACE="Verdana" SIZE=2> </P></FONT></BODY>
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</HTML>
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