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Leaked source code of windows server 2003
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windows-server-2003/multimedia/media/msacm/imaadpcm/imaadpcm.htm

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  1. <HTML>
  2. <HEAD>
  3. <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-
  4. 1252">
  5. <META NAME="Generator" CONTENT="Microsoft Word 97">
  6. <TITLE>Imaadpcm</TITLE>
  7. </HEAD>
  8. <BODY LINK="#0000ff">
  10. <FONT FACE="Verdana" SIZE=5><H2>Imaadpcm</H2>
  11. </FONT><FONT FACE="Verdana" SIZE=2>
  12. <P><span style="color:#FF0000;font-size:10pt;font-family:Arial">[This is preliminary
  13. documentation and subject to change.]</span></P>
  15. <H3>SUMMARY</H3></FONT><FONT FACE="Verdana" SIZE=2><P>
  16. Each of the three samples Msfilter, Msgsm610 and Imaadpcm illustrates an implementation of an Audio Compression Manager
  17. (ACM) software codec.
  18. This sample in particular
  19. contains encode and decode routines for the IMA's ADPCM
  20. format. This format is the same format used in Intel's DVI standard.
  21. Intel has made this algorithm public domain and the IMA has endorsed
  22. this format as a standard for audio compression.
  24. The sample works on both x86 and Alpha platforms. It is 64-bit compliant, but requires the addition of 64-bit
  25. headers before compilation. It builds properly with Microsoft&#174; Visual C&#174; 6.0.
  26. The sample does not support Plug and Play, Power Management, or On Now. These features are not applicable to ACM
  27. software codecs.
  30. <H3>BUILDING THE SAMPLE</H3></FONT><FONT FACE="Verdana"
  31. SIZE=2><P>
  34. Type <b>build</b> in the sample directory. A successful build produces the file Imaadp32.acm.
  37. <H3>CODE TOUR</H3>
  38. <H4>File Manifest</H4>
  39. </FONT><U><PRE>File&#9;&#9;Description
  40. </U>
  41. Codec.c&#9; ACM driver interfaces
  42. Codec.h&#9; header file for Codec.c
  43. Codec.rc&#9;string and dialog resources
  44. Codec.rcv&#9;version resource
  45. Config.c&#9;configuration dialog
  46. Debug.c&#9; debug utilities
  47. Debug.h&#9; header file for Debug.c
  48. Imaadpcm.c&#9;the codec algorithm
  49. Imaadpcm.h&#9;header file for Gsm610.c
  50. Muldiv32.h&#9;math helper macros
  51. Imaadpcm.def&#9;module definition file for linker
  52. Oemsetup.inf&#9;sample installation file for the driver
  54. </FONT><P ALIGN="CENTER"><A HREF="#top"><FONT FACE="Verdana" SIZE=2>Top of
  55. page</FONT></A><FONT FACE="Verdana" SIZE=2> </P></FONT>
  56. <TABLE CELLSPACING=0 BORDER=0 WIDTH=624>
  57. <TR><TD VALIGN="MIDDLE" BGCOLOR="#00ffff" HEIGHT=2>
  58. <P></TD>
  59. </TR>
  60. </TABLE>
  62. <FONT FACE="MS Sans Serif" SIZE=1><P>&copy; Microsoft Corporation 1999</FONT><FONT
  63. FACE="Verdana" SIZE=2> </P></FONT></BODY>
  64. </HTML>