1/*
2 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12/*
13 * This file contains the implementation of functions
14 * WebRtcSpl_MemSetW16()
15 * WebRtcSpl_MemSetW32()
16 * WebRtcSpl_MemCpyReversedOrder()
17 * WebRtcSpl_CopyFromEndW16()
18 * WebRtcSpl_ZerosArrayW16()
19 * WebRtcSpl_ZerosArrayW32()
20 * WebRtcSpl_OnesArrayW16()
21 * WebRtcSpl_OnesArrayW32()
22 *
23 * The description header can be found in signal_processing_library.h
24 *
25 */
26
27#include <string.h>
28#include "signal_processing_library.h"
29
30
31void WebRtcSpl_MemSetW16(WebRtc_Word16 *ptr, WebRtc_Word16 set_value, int length)
32{
33    int j;
34    WebRtc_Word16 *arrptr = ptr;
35
36    for (j = length; j > 0; j--)
37    {
38        *arrptr++ = set_value;
39    }
40}
41
42void WebRtcSpl_MemSetW32(WebRtc_Word32 *ptr, WebRtc_Word32 set_value, int length)
43{
44    int j;
45    WebRtc_Word32 *arrptr = ptr;
46
47    for (j = length; j > 0; j--)
48    {
49        *arrptr++ = set_value;
50    }
51}
52
53void WebRtcSpl_MemCpyReversedOrder(WebRtc_Word16* dest, WebRtc_Word16* source, int length)
54{
55    int j;
56    WebRtc_Word16* destPtr = dest;
57    WebRtc_Word16* sourcePtr = source;
58
59    for (j = 0; j < length; j++)
60    {
61        *destPtr-- = *sourcePtr++;
62    }
63}
64
65WebRtc_Word16 WebRtcSpl_CopyFromEndW16(G_CONST WebRtc_Word16 *vector_in,
66                                       WebRtc_Word16 length,
67                                       WebRtc_Word16 samples,
68                                       WebRtc_Word16 *vector_out)
69{
70    // Copy the last <samples> of the input vector to vector_out
71    WEBRTC_SPL_MEMCPY_W16(vector_out, &vector_in[length - samples], samples);
72
73    return samples;
74}
75
76WebRtc_Word16 WebRtcSpl_ZerosArrayW16(WebRtc_Word16 *vector, WebRtc_Word16 length)
77{
78    WebRtcSpl_MemSetW16(vector, 0, length);
79    return length;
80}
81
82WebRtc_Word16 WebRtcSpl_ZerosArrayW32(WebRtc_Word32 *vector, WebRtc_Word16 length)
83{
84    WebRtcSpl_MemSetW32(vector, 0, length);
85    return length;
86}
87
88WebRtc_Word16 WebRtcSpl_OnesArrayW16(WebRtc_Word16 *vector, WebRtc_Word16 length)
89{
90    WebRtc_Word16 i;
91    WebRtc_Word16 *tmpvec = vector;
92    for (i = 0; i < length; i++)
93    {
94        *tmpvec++ = 1;
95    }
96    return length;
97}
98
99WebRtc_Word16 WebRtcSpl_OnesArrayW32(WebRtc_Word32 *vector, WebRtc_Word16 length)
100{
101    WebRtc_Word16 i;
102    WebRtc_Word32 *tmpvec = vector;
103    for (i = 0; i < length; i++)
104    {
105        *tmpvec++ = 1;
106    }
107    return length;
108}
109