Author: wmb Date: Wed Aug 31 10:22:38 2011 New Revision: 2492 URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2492
Log: X86 - Added "upsample6" word to firfilter.fth
Modified: cpu/x86/firfilter.fth
Modified: cpu/x86/firfilter.fth ============================================================================== --- cpu/x86/firfilter.fth Wed Aug 31 10:21:10 2011 (r2491) +++ cpu/x86/firfilter.fth Wed Aug 31 10:22:38 2011 (r2492) @@ -60,7 +60,7 @@ \ Convert a decimal fraction to a scaled integer multiplier : mul: ( "coef" -- ) safe-parse-word push-decimal $number drop pop-base ( n ) - 1 mulscale lshift d# 1,000,000,000 */ ( n' ) + 1 mulscale lshift d# 1,000,000,000 */ ( n' ) , ;
@@ -146,6 +146,8 @@ r> 3drop ( ) ;
+: upsample6 ( inbuf /inbuf outbuf -- ) 2 8khz>khz ; + 0 [if] \ Here is some Matlab/Octave code to compute the weights weights = remez(95, [0 .12 .215 1], [1 1 0 0]);