From d4ff9abc610add56b6c9e0ec193519f48689c0bd Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Thu, 14 Oct 2004 05:15:48 +0000
Subject: Update to new iLBC codec

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3997 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 codecs/ilbc/gainquant.c | 208 ++++++++++++++++++++++++------------------------
 1 file changed, 105 insertions(+), 103 deletions(-)

(limited to 'codecs/ilbc/gainquant.c')

diff --git a/codecs/ilbc/gainquant.c b/codecs/ilbc/gainquant.c
index e0085c688..a23ce05b4 100755
--- a/codecs/ilbc/gainquant.c
+++ b/codecs/ilbc/gainquant.c
@@ -1,104 +1,106 @@
- 
-/****************************************************************** 
- 
-    iLBC Speech Coder ANSI-C Source Code 
- 
-    gainquant.c  
- 
-    Copyright (c) 2001, 
-    Global IP Sound AB. 
-    All rights reserved. 
- 
-******************************************************************/ 
- 
-#include <string.h> 
-#include <math.h> 
-#include "constants.h" 
-#include "filter.h" 
-#include "gainquant.h"
- 
-/*----------------------------------------------------------------* 
- *  quantizer for the gain in the gain-shape coding of residual 
- *---------------------------------------------------------------*/ 
- 
-float gainquant(/* (o) quantized gain value */ 
-    float in,       /* (i) gain value */ 
-    float maxIn,/* (i) maximum of gain value */ 
-    int cblen,      /* (i) number of quantization indices */ 
-    int *index      /* (o) quantization index */ 
-){ 
-    int i, tindex; 
-    float minmeasure,measure, *cb, scale; 
- 
-    /* ensure a lower bound on the scaling factor */ 
- 
-    scale=maxIn; 
-     
-    if (scale<0.1) { 
-        scale=(float)0.1; 
-    } 
- 
-    /* select the quantization table */ 
-     
-    if (cblen == 8) { 
-        cb = gain_sq3Tbl; 
-    } else if (cblen == 16) { 
-        cb = gain_sq4Tbl; 
-    } else  { 
-        cb = gain_sq5Tbl; 
-    } 
- 
-    /* select the best index in the quantization table */ 
-     
-    minmeasure=10000000.0; 
-    tindex=0; 
-    for (i=0;i<cblen;i++) { 
-        measure=(in-scale*cb[i])*(in-scale*cb[i]); 
-         
-        if (measure<minmeasure) { 
-            tindex=i; 
-            minmeasure=measure; 
-        } 
-    } 
-    *index=tindex; 
+
+/******************************************************************
+
+    iLBC Speech Coder ANSI-C Source Code
+
+    gainquant.c 
+
+    Copyright (C) The Internet Society (2004). 
+    All Rights Reserved.
+
+
+
+******************************************************************/
+
+#include <string.h>
+#include <math.h>
+#include "constants.h"
+#include "filter.h"
+
+/*----------------------------------------------------------------*
+ *  quantizer for the gain in the gain-shape coding of residual
+ *---------------------------------------------------------------*/
+
+float gainquant(/* (o) quantized gain value */
+    float in,       /* (i) gain value */
+    float maxIn,/* (i) maximum of gain value */
+    int cblen,      /* (i) number of quantization indices */
+    int *index      /* (o) quantization index */
+){
+    int i, tindex;
+    float minmeasure,measure, *cb, scale;
+
+    /* ensure a lower bound on the scaling factor */
+
+    scale=maxIn;
+    
+    if (scale<0.1) {
+        scale=(float)0.1;
+    }
+
+    /* select the quantization table */
+    
+    if (cblen == 8) {
+        cb = gain_sq3Tbl;
+    } else if (cblen == 16) {
+        cb = gain_sq4Tbl;
+    } else  {
+        cb = gain_sq5Tbl;
+    }
+
+    /* select the best index in the quantization table */
+    
+    minmeasure=10000000.0;
+    tindex=0;
+    for (i=0; i<cblen; i++) {
+        measure=(in-scale*cb[i])*(in-scale*cb[i]);
         
-    /* return the quantized value */ 
-     
-    return scale*cb[tindex]; 
-} 
- 
-/*----------------------------------------------------------------* 
- *  decoder for quantized gains in the gain-shape coding of  
- *  residual                           
- *---------------------------------------------------------------*/ 
- 
-float gaindequant(  /* (o) quantized gain value */ 
-    int index,      /* (i) quantization index */ 
-    float maxIn,/* (i) maximum of unquantized gain */ 
-    int cblen       /* (i) number of quantization indices */ 
-){ 
-    float scale; 
- 
-    /* obtain correct scale factor */ 
- 
-    scale=(float)fabs(maxIn); 
-     
-    if (scale<0.1) { 
-        scale=(float)0.1; 
-    } 
- 
-    /* select the quantization table and return the decoded value */ 
- 
-    if (cblen==8) { 
-        return scale*gain_sq3Tbl[index]; 
-    } else if (cblen==16) { 
-        return scale*gain_sq4Tbl[index]; 
-    } 
-    else if (cblen==32) { 
-        return scale*gain_sq5Tbl[index]; 
-    } 
- 
-    return 0.0; 
-} 
- 
- 
+        if (measure<minmeasure) {
+            tindex=i;
+            minmeasure=measure;
+        }
+    }
+    *index=tindex;
+       
+    /* return the quantized value */
+    
+
+
+    return scale*cb[tindex];
+}
+
+/*----------------------------------------------------------------*
+ *  decoder for quantized gains in the gain-shape coding of 
+ *  residual                          
+ *---------------------------------------------------------------*/
+
+float gaindequant(  /* (o) quantized gain value */
+    int index,      /* (i) quantization index */
+    float maxIn,/* (i) maximum of unquantized gain */
+    int cblen       /* (i) number of quantization indices */
+){
+    float scale;
+
+    /* obtain correct scale factor */
+
+    scale=(float)fabs(maxIn);
+    
+    if (scale<0.1) {
+        scale=(float)0.1;
+    }
+
+    /* select the quantization table and return the decoded value */
+
+    if (cblen==8) {
+        return scale*gain_sq3Tbl[index];
+    } else if (cblen==16) {
+        return scale*gain_sq4Tbl[index];
+    }
+    else if (cblen==32) {
+        return scale*gain_sq5Tbl[index];
+    }
+
+    return 0.0;
+}
+
+
-- 
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