1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 /**
17 ******************************************************************************
18 * @file M4ChannelCoverter.c
19 * @brief
20 * @note
21 ******************************************************************************
22 */
23
MonoTo2I_16(const short * src,short * dst,short n)24 void MonoTo2I_16( const short *src,
25 short *dst,
26 short n)
27 {
28 short ii;
29 src += n-1;
30 dst += (n*2)-1;
31
32 for (ii = n; ii != 0; ii--){
33 *dst-- = *src;
34 *dst-- = *src--;
35 }
36
37 return;
38 }
39
From2iToMono_16(const short * src,short * dst,short n)40 void From2iToMono_16( const short *src,
41 short *dst,
42 short n)
43 {
44 short ii;
45 long Temp;
46 for (ii = n; ii != 0; ii--){
47 Temp = (long)*(src++);
48 Temp += (long)*(src++);
49 *(dst++) = (short)(Temp >>1);
50 }
51
52 return;
53 }
54
55