From: Joshua Colp <jcolp@digium.com>
Date: Wed, 29 Aug 2007 02:21:08 +0000 (+0000)
Subject: Add inline function for signed linear subtraction.
X-Git-Tag: 1.6.0-beta1~3^2~1593
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=440aab5ffacd1fdc1213605431e9dc46bab04d64;p=thirdparty%2Fasterisk.git

Add inline function for signed linear subtraction.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81326 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/include/asterisk/utils.h b/include/asterisk/utils.h
index 6f97770d9e..d87ea03395 100644
--- a/include/asterisk/utils.h
+++ b/include/asterisk/utils.h
@@ -283,6 +283,19 @@ static force_inline void ast_slinear_saturated_add(short *input, short *value)
 	else
 		*input = (short) res;
 }
+
+static force_inline void ast_slinear_saturated_subtract(short *input, short *value)
+{
+	int res;
+
+	res = (int) *input - *value;
+	if (res > 32767)
+		*input = 32767;
+	else if (res < -32767)
+		*input = -32767;
+	else
+		*input = (short) res;
+}
 	
 static force_inline void ast_slinear_saturated_multiply(short *input, short *value)
 {