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
WebRtcSpl_MemSetW16(WebRtc_Word16 * ptr,WebRtc_Word16 set_value,int length)31 void 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
WebRtcSpl_MemSetW32(WebRtc_Word32 * ptr,WebRtc_Word32 set_value,int length)42 void 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
WebRtcSpl_MemCpyReversedOrder(WebRtc_Word16 * dest,WebRtc_Word16 * source,int length)53 void 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
WebRtcSpl_CopyFromEndW16(G_CONST WebRtc_Word16 * vector_in,WebRtc_Word16 length,WebRtc_Word16 samples,WebRtc_Word16 * vector_out)65 WebRtc_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
WebRtcSpl_ZerosArrayW16(WebRtc_Word16 * vector,WebRtc_Word16 length)76 WebRtc_Word16 WebRtcSpl_ZerosArrayW16(WebRtc_Word16 *vector, WebRtc_Word16 length)
77 {
78 WebRtcSpl_MemSetW16(vector, 0, length);
79 return length;
80 }
81
WebRtcSpl_ZerosArrayW32(WebRtc_Word32 * vector,WebRtc_Word16 length)82 WebRtc_Word16 WebRtcSpl_ZerosArrayW32(WebRtc_Word32 *vector, WebRtc_Word16 length)
83 {
84 WebRtcSpl_MemSetW32(vector, 0, length);
85 return length;
86 }
87
WebRtcSpl_OnesArrayW16(WebRtc_Word16 * vector,WebRtc_Word16 length)88 WebRtc_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
WebRtcSpl_OnesArrayW32(WebRtc_Word32 * vector,WebRtc_Word16 length)99 WebRtc_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