M4ChannelConverter.c revision e84b6c0d8b1c969975560726ca1cf87d5c676ad6 
1/*
2 * Copyright (C) 2004-2011 NXP Software
3 * Copyright (C) 2011 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 * @file    M4ChannelCoverter.c
20 * @brief
21 * @note
22 ******************************************************************************
23 */
24
25void MonoTo2I_16( const short *src,
26                        short *dst,
27                        short n)
28{
29    short ii;
30    src += n-1;
31    dst += (n*2)-1;
32
33    for (ii = n; ii != 0; ii--){
34        *dst-- = *src;
35        *dst-- = *src--;
36    }
37
38    return;
39}
40
41void From2iToMono_16( const short *src,
42                            short *dst,
43                            short n)
44{
45    short ii;
46    long Temp;
47    for (ii = n; ii != 0; ii--){
48        Temp = (long)*(src++);
49        Temp += (long)*(src++);
50        *(dst++) = (short)(Temp >>1);
51    }
52
53    return;
54}
55
56