[Scummvm-cvs-logs] SF.net SVN: scummvm: [27991] scummvm/branches/gsoc2007-mixer/sound

[dogmatixman at users.sourceforge.net]

Revision: 27991
          http://scummvm.svn.sourceforge.net/scummvm/?rev=27991&view=rev
Author:   dogmatixman
Date:     2007-07-09 10:05:44 -0700 (Mon, 09 Jul 2007)

Log Message:
-----------
Bugfix for even length filters, and added a destructor.

Modified Paths:
--------------
    scummvm/branches/gsoc2007-mixer/sound/filter.cpp
    scummvm/branches/gsoc2007-mixer/sound/filter.h

Modified: scummvm/branches/gsoc2007-mixer/sound/filter.cpp
===================================================================
--- scummvm/branches/gsoc2007-mixer/sound/filter.cpp	2007-07-09 12:17:15 UTC (rev 27990)
+++ scummvm/branches/gsoc2007-mixer/sound/filter.cpp	2007-07-09 17:05:44 UTC (rev 27991)
@@ -110,7 +110,7 @@
 	}
 	
 	for (i = 0; i <= (length - 1) / 2; i++) {
-		int16 n = i - (length - 1) / 2;
+		double n = i - (length - 1) / 2 - ((length % 2) ? 0 : 0.5);
 		
 		/*
 		 * Both this window and the later filter are even symmetric, so we
@@ -144,7 +144,7 @@
 	uint16 i;
 	
 	for (i = 0; i <= (length - 1) / 2; i++) {
-		int16 n = i - (length - 1) / 2;
+		double n = i - (length - 1) / 2 - ((length % 2) ? 0 : 0.5);
 		
 		/*
 		 * Use an ideal transition halfway between the passband and stopband

Modified: scummvm/branches/gsoc2007-mixer/sound/filter.h
===================================================================
--- scummvm/branches/gsoc2007-mixer/sound/filter.h	2007-07-09 12:17:15 UTC (rev 27990)
+++ scummvm/branches/gsoc2007-mixer/sound/filter.h	2007-07-09 17:05:44 UTC (rev 27991)
@@ -52,6 +52,8 @@
 			double dBStopbandAtten,
 			uint16 samplingFreq);
 	
+	~FIRFilter() { free(_coeffs); }
+	
 	uint16 getLength() { return _length; }
 	
 	double *getCoeffs() { return _coeffs; }


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