1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3 4<head> 5<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 6<META name="GENERATOR" content="IBM WebSphere Studio Homepage Builder Version 7.0.0.0 for Windows"> 7<META http-equiv="Content-Style-Type" content="text/css"> 8<title>MI_UnfilterDiff*</title> 9<LINK rel="stylesheet" href="../../css/nitro.css" type="text/css"> 10</head> 11 12<body> 13 14<h1 align="left">MI_UnfilterDiff* <IMG src="../../image/NTR.gif" width="23" height="12" border="0" align="middle"><IMG src="../../image/TWL.gif" width="23" height="12" border="0" align="middle"></h1> 15<h2>Syntax</h2> 16 17<dl> 18 <dd> 19<CODE>#include <nitro/mi.h></CODE><BR> <BR> <CODE>void MI_UnfilterDiff8( const void* srcp, void* destp );</CODE><br> <CODE>void MI_UnfilterDiff16( const void* srcp, void* destp );</CODE><br> <CODE>void MI_UnfilterDiff32( const void* srcp, void* destp );</CODE></dd> 20</dl> 21<h2>Arguments</h2> 22<TABLE border="1" width="100%"> 23 <TBODY> 24 <TR> 25<TD width="13%"><EM><STRONG>srcp</STRONG></EM></TD> 26<TD width="87%">The source address where difference filtered-data is stored.</TD> 27 </TR> 28 <TR> 29<TD width="13%"><EM><STRONG>destp</STRONG></EM></TD> 30<TD width="87%">The destination address where the data is expanded. Can be the same region as the source address.</TD> 31 </TR> 32 </TBODY> 33</TABLE> 34 35<h2>Return Values</h2> 36<p>None.</p> 37 38<H2>Description</H2> 39<P>This function expands the data to which the difference filter was applied and writes it to the specified memory region. The source address must be aligned to a 4-byte boundary. When the size of the compressed data is not a multiple of 4, adjust by padding it with zeros. The pointers to the source and destination addresses may point to the same region.</P> 40<P><code>MI_UnfilterDiff8</code> writes in 8-bit units. On NITRO, you cannot decompress directly to VRAM. On TWL, this is possible, but it is quite slow.<BR><BR> <code>MI_UnfilterDiff16</code> writes in 16-bit units. It is also possible to decompress to DTCM or VRAM.<BR><BR><BR> <CODE>MI_UnfilterDiff32()</CODE> writes in 32-bit units. <BR>It operates at a higher speed than both the <CODE>MI_UnfilterDiff8</CODE> and <CODE>MI_UnfilterDiff16</CODE> functions.<BR>It is also possible to decompress to DTCM or VRAM.</P> 41<h2>Internal Operation</h2> 42<P>Processing only takes place on the CPU, without the use of a system call or DMA.</P> 43<h2>See Also</h2> 44<p><CODE><A href="MI_FilterDiff.html">MI_FilterDiff</A><BR> <A href="MI_UncompressHuffman.html">MI_UncompressHuffman</A><BR> <A href="MI_UncompressRL.html">MI_UncompressRL*</A><BR> <A href="MI_UncompressLZ.html">MI_UncompressLZ*</A><br></CODE></p> 45 46<H2>Revision History</H2> 47<P> 482008/07/02 Added the 32-bit version. Revised the description of internal operations.<BR>2004/11/15 Initial version. 49</P> 50<hr><p>CONFIDENTIAL</p></body> 51</html> 52
