Opus 1.2.1android-o-iot-preview-5o-iot-preview-5

Change-Id: I551f1de5c5e121ac1275334e67c7e0f96ab18114

Test: - verified builds for arm*/mips*/x86*
      - checked functionality using an emulator and stagefright

1 files changed, 8 insertions, 7 deletions

diff --git a/silk/float/k2a_FLP.c b/silk/float/k2a_FLP.c
index 12af4e76..1448008d 100644
--- a/silk/float/k2a_FLP.c
+++ b/silk/float/k2a_FLP.c
@@ -39,15 +39,16 @@ void silk_k2a_FLP(
 )
 {
     opus_int   k, n;
-    silk_float Atmp[ SILK_MAX_ORDER_LPC ];
+    silk_float rck, tmp1, tmp2;
 
     for( k = 0; k < order; k++ ) {
-        for( n = 0; n < k; n++ ) {
-            Atmp[ n ] = A[ n ];
+        rck = rc[ k ];
+        for( n = 0; n < (k + 1) >> 1; n++ ) {
+            tmp1 = A[ n ];
+            tmp2 = A[ k - n - 1 ];
+            A[ n ]         = tmp1 + tmp2 * rck;
+            A[ k - n - 1 ] = tmp2 + tmp1 * rck;
         }
-        for( n = 0; n < k; n++ ) {
-            A[ n ] += Atmp[ k - n - 1 ] * rc[ k ];
-        }
-        A[ k ] = -rc[ k ];
+        A[ k ] = -rck;
     }
 }