Changeset 1826 for pjproject/trunk/pjmedia/src/pjmedia/wsola.c

Timestamp:

Feb 28, 2008 4:28:41 PM (16 years ago)

Author:

bennylp

Message:

A little bit of optimization in WSOLA

File:

• pjproject/trunk/pjmedia/src/pjmedia/wsola.c (modified) (5 diffs)

pjproject/trunk/pjmedia/src/pjmedia/wsola.c

@@ -25 +25 @@
 #define THIS_FILE   "wsola.c"
 
+//#undef PJ_HAS_FLOATING_POINT
 
 /* History size, in percentage of samples_per_frame */
@@ -92 +93 @@
         unsigned i;
 
-        for (i=0; i<template_cnt; ++i) {
+        for (i=0; i<template_cnt; i += 8) {
+            corr += ((float)frm[i+0]) * ((float)sr[i+0]) + 
+                    ((float)frm[i+1]) * ((float)sr[i+1]) + 
+                    ((float)frm[i+2]) * ((float)sr[i+2]) + 
+                    ((float)frm[i+3]) * ((float)sr[i+3]) + 
+                    ((float)frm[i+4]) * ((float)sr[i+4]) + 
+                    ((float)frm[i+5]) * ((float)sr[i+5]) + 
+                    ((float)frm[i+6]) * ((float)sr[i+6]) + 
+                    ((float)frm[i+7]) * ((float)sr[i+7]);
+        }
+        for (; i<template_cnt; ++i) {
             corr += ((float)frm[i]) * ((float)sr[i]);
         }
@@ -161 +172 @@
     pj_int64_t best_corr = 0;
 
+    
     for (sr=beg; sr!=end; ++sr) {
         pj_int64_t corr = 0;
         unsigned i;
 
-        for (i=0; i<template_cnt; ++i) {
+        for (i=0; i<template_cnt; i+=8) {
+            corr += ((int)frm[i+0]) * ((int)sr[i+0]) + 
+                    ((int)frm[i+1]) * ((int)sr[i+1]) + 
+                    ((int)frm[i+2]) * ((int)sr[i+2]) +
+                    ((int)frm[i+3]) * ((int)sr[i+3]) +
+                    ((int)frm[i+4]) * ((int)sr[i+4]) +
+                    ((int)frm[i+5]) * ((int)sr[i+5]) +
+                    ((int)frm[i+6]) * ((int)sr[i+6]) +
+                    ((int)frm[i+7]) * ((int)sr[i+7]);
+        }
+        for (; i<template_cnt; ++i) {
             corr += ((int)frm[i]) * ((int)sr[i]);
         }
@@ -193 +215 @@
 
     for (i=0; i<count; ++i) {
-        int val;
-        val = ((int)(l[i]) * (int)(w[count-1-i]) + 
-               (int)(r[i]) * (int)(w[i]));
-        dst[i] = (short)(val >> WINDOW_BITS);
-
-        assert((val>=0 && dst[i]>=0) ||
-               (val<0 && dst[i]<0));
+        dst[i] = (short)(((int)(l[i]) * (int)(w[count-1-i]) + 
+                          (int)(r[i]) * (int)(w[i])) >> WINDOW_BITS);
     }
 }
@@ -211 +228 @@
 
     for (i=0; i<count; ++i) {
-        int val;
-
-        assert(stepdown >= 0);
-
-        val = (l[i] * stepdown + r[i] * (1-stepdown));
-        dst[i] = (short)(val >> WINDOW_BITS);
+        dst[i]=(short)((l[i] * stepdown + r[i] * (1-stepdown)) >> WINDOW_BITS);
         stepdown -= step;
-
-        assert((val>=0 && dst[i]>=0) ||
-               (val<0 && dst[i]<0));
     }
 }