1 /*
2 * Copyright (C) 2004-2010 NXP Software
3 * Copyright (C) 2010 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 /**********************************************************************************
19 INCLUDE FILES
20 ***********************************************************************************/
21
22 #include "VectorArithmetic.h"
23
From2iToMS_Float(const LVM_FLOAT * src,LVM_FLOAT * dstM,LVM_FLOAT * dstS,LVM_INT16 n)24 void From2iToMS_Float(const LVM_FLOAT* src, LVM_FLOAT* dstM, LVM_FLOAT* dstS, LVM_INT16 n) {
25 LVM_FLOAT temp1, left, right;
26 LVM_INT16 ii;
27 for (ii = n; ii != 0; ii--) {
28 left = (LVM_FLOAT)*src;
29 src++;
30
31 right = (LVM_FLOAT)*src;
32 src++;
33
34 /* Compute M signal*/
35 temp1 = (left + right) / 2.0f;
36 *dstM = (LVM_FLOAT)temp1;
37 dstM++;
38
39 /* Compute S signal*/
40 temp1 = (left - right) / 2.0f;
41 *dstS = (LVM_FLOAT)temp1;
42 dstS++;
43 }
44
45 return;
46 }
47