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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 "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
23 
WebRtcSpl_ReverseOrderMultArrayElements(int16_t * out,const int16_t * in,const int16_t * win,int16_t vector_length,int16_t right_shifts)24 void WebRtcSpl_ReverseOrderMultArrayElements(int16_t *out, const int16_t *in,
25                                              const int16_t *win,
26                                              int16_t vector_length,
27                                              int16_t right_shifts)
28 {
29     int 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)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
36                                                                *winptr--, right_shifts);
37     }
38 }
39 
WebRtcSpl_ElementwiseVectorMult(int16_t * out,const int16_t * in,const int16_t * win,int16_t vector_length,int16_t right_shifts)40 void WebRtcSpl_ElementwiseVectorMult(int16_t *out, const int16_t *in,
41                                      const int16_t *win, int16_t vector_length,
42                                      int16_t right_shifts)
43 {
44     int i;
45     int16_t *outptr = out;
46     const int16_t *inptr = in;
47     const int16_t *winptr = win;
48     for (i = 0; i < vector_length; i++)
49     {
50         (*outptr++) = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
51                                                                *winptr++, right_shifts);
52     }
53 }
54 
WebRtcSpl_AddVectorsAndShift(int16_t * out,const int16_t * in1,const int16_t * in2,int16_t vector_length,int16_t right_shifts)55 void WebRtcSpl_AddVectorsAndShift(int16_t *out, const int16_t *in1,
56                                   const int16_t *in2, int16_t vector_length,
57                                   int16_t right_shifts)
58 {
59     int i;
60     int16_t *outptr = out;
61     const int16_t *in1ptr = in1;
62     const int16_t *in2ptr = in2;
63     for (i = vector_length; i > 0; i--)
64     {
65         (*outptr++) = (int16_t)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
66     }
67 }
68 
WebRtcSpl_AddAffineVectorToVector(int16_t * out,int16_t * in,int16_t gain,int32_t add_constant,int16_t right_shifts,int vector_length)69 void WebRtcSpl_AddAffineVectorToVector(int16_t *out, int16_t *in,
70                                        int16_t gain, int32_t add_constant,
71                                        int16_t right_shifts, int vector_length)
72 {
73     int16_t *inPtr;
74     int16_t *outPtr;
75     int i;
76 
77     inPtr = in;
78     outPtr = out;
79     for (i = 0; i < vector_length; i++)
80     {
81         (*outPtr++) += (int16_t)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
82                 + (int32_t)add_constant) >> right_shifts);
83     }
84 }
85 
WebRtcSpl_AffineTransformVector(int16_t * out,int16_t * in,int16_t gain,int32_t add_constant,int16_t right_shifts,int vector_length)86 void WebRtcSpl_AffineTransformVector(int16_t *out, int16_t *in,
87                                      int16_t gain, int32_t add_constant,
88                                      int16_t right_shifts, int vector_length)
89 {
90     int16_t *inPtr;
91     int16_t *outPtr;
92     int i;
93 
94     inPtr = in;
95     outPtr = out;
96     for (i = 0; i < vector_length; i++)
97     {
98         (*outPtr++) = (int16_t)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
99                 + (int32_t)add_constant) >> right_shifts);
100     }
101 }
102