From f8247040e6231c4b3b5099ea3a526348b7941566 Mon Sep 17 00:00:00 2001
From: russell <russell@f38db490-d61c-443f-a65b-d21fe96a405b>
Date: Sat, 19 Jan 2008 00:19:29 +0000
Subject: Creating tag for the release of asterisk-1.6.0-beta1

git-svn-id: http://svn.digium.com/svn/asterisk/tags/1.6.0-beta1@99163 f38db490-d61c-443f-a65b-d21fe96a405b
---
 trunk/codecs/ilbc/hpOutput.c | 59 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 trunk/codecs/ilbc/hpOutput.c

(limited to 'trunk/codecs/ilbc/hpOutput.c')

diff --git a/trunk/codecs/ilbc/hpOutput.c b/trunk/codecs/ilbc/hpOutput.c
new file mode 100644
index 000000000..fdc0f6db9
--- /dev/null
+++ b/trunk/codecs/ilbc/hpOutput.c
@@ -0,0 +1,59 @@
+
+/******************************************************************
+
+    iLBC Speech Coder ANSI-C Source Code
+
+    hpOutput.c 
+
+    Copyright (C) The Internet Society (2004). 
+    All Rights Reserved.
+
+
+
+******************************************************************/
+
+#include "constants.h"
+#include "hpOutput.h"
+/*----------------------------------------------------------------*
+ *  Output high-pass filter                          
+ *---------------------------------------------------------------*/
+
+void hpOutput(
+    float *In,  /* (i) vector to filter */
+    int len,/* (i) length of vector to filter */
+    float *Out, /* (o) the resulting filtered vector */
+    float *mem  /* (i/o) the filter state */
+){
+    int i;
+    float *pi, *po;
+
+    /* all-zero section*/
+
+    pi = &In[0];
+    po = &Out[0];
+    for (i=0; i<len; i++) {
+        *po = hpo_zero_coefsTbl[0] * (*pi);
+        *po += hpo_zero_coefsTbl[1] * mem[0];
+        *po += hpo_zero_coefsTbl[2] * mem[1];
+
+        mem[1] = mem[0];
+        mem[0] = *pi;
+        po++;
+        pi++;
+
+    }
+
+    /* all-pole section*/
+
+    po = &Out[0];
+    for (i=0; i<len; i++) {
+        *po -= hpo_pole_coefsTbl[1] * mem[2];
+        *po -= hpo_pole_coefsTbl[2] * mem[3];
+
+        mem[3] = mem[2];
+        mem[2] = *po;
+        po++;
+    }
+}
+
+
-- 
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