1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
20
21 3GPP TS 26.173
22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
23 Available from http://www.3gpp.org
24
25 (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26 Permission to distribute, modify and use this file under the standard license
27 terms listed above has been obtained from the copyright holder.
28 ****************************************************************************************/
29 /*
30 ------------------------------------------------------------------------------
31
32
33
34 Filename: pit_shrp.cpp
35
36 Date: 05/08/2007
37
38 ------------------------------------------------------------------------------
39 REVISION HISTORY
40
41
42 Description:
43
44 ------------------------------------------------------------------------------
45 INPUT AND OUTPUT DEFINITIONS
46
47 int16 * x, in/out: impulse response (or algebraic code)
48 int16 pit_lag, input : pitch lag
49 int16 sharp, input : pitch sharpening factor (Q15)
50 int16 L_subfr input : subframe size
51
52 ------------------------------------------------------------------------------
53 FUNCTION DESCRIPTION
54
55 Performs Pitch sharpening routine
56
57 ------------------------------------------------------------------------------
58 REQUIREMENTS
59
60
61 ------------------------------------------------------------------------------
62 REFERENCES
63
64 ------------------------------------------------------------------------------
65 PSEUDO-CODE
66
67 ------------------------------------------------------------------------------
68 */
69
70
71 /*----------------------------------------------------------------------------
72 ; INCLUDES
73 ----------------------------------------------------------------------------*/
74 #include "pv_amr_wb_type_defs.h"
75 #include "pvamrwbdecoder_basic_op.h"
76 #include "pvamrwbdecoder_acelp.h"
77
78 /*----------------------------------------------------------------------------
79 ; MACROS
80 ; Define module specific macros here
81 ----------------------------------------------------------------------------*/
82
83
84 /*----------------------------------------------------------------------------
85 ; DEFINES
86 ; Include all pre-processor statements here. Include conditional
87 ; compile variables also.
88 ----------------------------------------------------------------------------*/
89
90 /*----------------------------------------------------------------------------
91 ; LOCAL FUNCTION DEFINITIONS
92 ; Function Prototype declaration
93 ----------------------------------------------------------------------------*/
94
95 /*----------------------------------------------------------------------------
96 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS
97 ; Variable declaration - defined here and used outside this module
98 ----------------------------------------------------------------------------*/
99
100 /*----------------------------------------------------------------------------
101 ; EXTERNAL FUNCTION REFERENCES
102 ; Declare functions defined elsewhere and referenced in this module
103 ----------------------------------------------------------------------------*/
104
105 /*----------------------------------------------------------------------------
106 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
107 ; Declare variables used in this module but defined elsewhere
108 ----------------------------------------------------------------------------*/
109
110 /*----------------------------------------------------------------------------
111 ; FUNCTION CODE
112 ----------------------------------------------------------------------------*/
113
Pit_shrp(int16 * x,int16 pit_lag,int16 sharp,int16 L_subfr)114 void Pit_shrp(
115 int16 * x, /* in/out: impulse response (or algebraic code) */
116 int16 pit_lag, /* input : pitch lag */
117 int16 sharp, /* input : pitch sharpening factor (Q15) */
118 int16 L_subfr /* input : subframe size */
119 )
120 {
121 int16 i;
122 int32 L_tmp;
123
124 for (i = pit_lag; i < L_subfr; i++)
125 {
126 L_tmp = mac_16by16_to_int32((int32)x[i] << 16, x[i - pit_lag], sharp);
127 x[i] = amr_wb_round(L_tmp);
128
129 }
130
131 return;
132 }
133