1 /*
2 * Copyright (c) 2012 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 implementations of the iLBC specific functions
14 * WebRtcSpl_ReverseOrderMultArrayElements()
15 * WebRtcSpl_ElementwiseVectorMult()
16 * WebRtcSpl_AddVectorsAndShift()
17 * WebRtcSpl_AddAffineVectorToVector()
18 * WebRtcSpl_AffineTransformVector()
19 *
20 */
21
22 #include "common_audio/signal_processing/include/signal_processing_library.h"
23
WebRtcSpl_ReverseOrderMultArrayElements(int16_t * out,const int16_t * in,const int16_t * win,size_t vector_length,int16_t right_shifts)24 void WebRtcSpl_ReverseOrderMultArrayElements(int16_t *out, const int16_t *in,
25 const int16_t *win,
26 size_t vector_length,
27 int16_t right_shifts)
28 {
29 size_t i;
30 int16_t *outptr = out;
31 const int16_t *inptr = in;
32 const int16_t *winptr = win;
33 for (i = 0; i < vector_length; i++)
34 {
35 *outptr++ = (int16_t)((*inptr++ * *winptr--) >> right_shifts);
36 }
37 }
38
WebRtcSpl_ElementwiseVectorMult(int16_t * out,const int16_t * in,const int16_t * win,size_t vector_length,int16_t right_shifts)39 void WebRtcSpl_ElementwiseVectorMult(int16_t *out, const int16_t *in,
40 const int16_t *win, size_t vector_length,
41 int16_t right_shifts)
42 {
43 size_t i;
44 int16_t *outptr = out;
45 const int16_t *inptr = in;
46 const int16_t *winptr = win;
47 for (i = 0; i < vector_length; i++)
48 {
49 *outptr++ = (int16_t)((*inptr++ * *winptr++) >> right_shifts);
50 }
51 }
52
WebRtcSpl_AddVectorsAndShift(int16_t * out,const int16_t * in1,const int16_t * in2,size_t vector_length,int16_t right_shifts)53 void WebRtcSpl_AddVectorsAndShift(int16_t *out, const int16_t *in1,
54 const int16_t *in2, size_t vector_length,
55 int16_t right_shifts)
56 {
57 size_t i;
58 int16_t *outptr = out;
59 const int16_t *in1ptr = in1;
60 const int16_t *in2ptr = in2;
61 for (i = vector_length; i > 0; i--)
62 {
63 (*outptr++) = (int16_t)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
64 }
65 }
66
WebRtcSpl_AddAffineVectorToVector(int16_t * out,const int16_t * in,int16_t gain,int32_t add_constant,int16_t right_shifts,size_t vector_length)67 void WebRtcSpl_AddAffineVectorToVector(int16_t *out, const int16_t *in,
68 int16_t gain, int32_t add_constant,
69 int16_t right_shifts,
70 size_t vector_length)
71 {
72 size_t i;
73
74 for (i = 0; i < vector_length; i++)
75 {
76 out[i] += (int16_t)((in[i] * gain + add_constant) >> right_shifts);
77 }
78 }
79
WebRtcSpl_AffineTransformVector(int16_t * out,const int16_t * in,int16_t gain,int32_t add_constant,int16_t right_shifts,size_t vector_length)80 void WebRtcSpl_AffineTransformVector(int16_t *out, const int16_t *in,
81 int16_t gain, int32_t add_constant,
82 int16_t right_shifts, size_t vector_length)
83 {
84 size_t i;
85
86 for (i = 0; i < vector_length; i++)
87 {
88 out[i] = (int16_t)((in[i] * gain + add_constant) >> right_shifts);
89 }
90 }
91