DelayWrite_32.c revision 2c8e5cab3faa6d360e222b7a6c40a80083d021ac 
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/*                                                                      */
20/*     Project::                                                        */
21/*     $Author: beq07716 $*/
22/*     $Revision: 1000 $*/
23/*     $Date: 2010-06-28 13:08:20 +0200 (Mon, 28 Jun 2010) $*/
24/*                                                                      */
25/************************************************************************/
26
27/**********************************************************************************
28   INCLUDE FILES
29***********************************************************************************/
30
31#include "VectorArithmetic.h"
32
33/**********************************************************************************
34   FUNCTION DelayMix_16x16
35***********************************************************************************/
36
37void DelayWrite_32(const LVM_INT32  *src,               /* Source 1, to be delayed */
38                         LVM_INT32  *delay,             /* Delay buffer */
39                         LVM_UINT16 size,               /* Delay size */
40                         LVM_UINT16 *pOffset,           /* Delay offset */
41                         LVM_INT16  n)                  /* Number of samples */
42{
43    LVM_INT16   i;
44    LVM_INT16   Offset  = (LVM_INT16)*pOffset;
45
46    for (i=0; i<n; i++)
47    {
48        delay[Offset] = *src;
49        Offset++;
50        src++;
51
52        /* Make the delay buffer a circular buffer */
53        if (Offset >= size)
54        {
55            Offset = 0;
56        }
57    }
58
59    /* Update the offset */
60    *pOffset = (LVM_UINT16)Offset;
61
62    return;
63}
64
65/**********************************************************************************/
66
67