Line data Source code
1 : /******************************************************************************************************
2 :
3 : (C) 2022-2025 IVAS codec Public Collaboration with portions copyright Dolby International AB, Ericsson AB,
4 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
5 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
6 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
7 : contributors to this repository. All Rights Reserved.
8 :
9 : This software is protected by copyright law and by international treaties.
10 : The IVAS codec Public Collaboration consisting of Dolby International AB, Ericsson AB,
11 : Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Huawei Technologies Co. LTD.,
12 : Koninklijke Philips N.V., Nippon Telegraph and Telephone Corporation, Nokia Technologies Oy, Orange,
13 : Panasonic Holdings Corporation, Qualcomm Technologies, Inc., VoiceAge Corporation, and other
14 : contributors to this repository retain full ownership rights in their respective contributions in
15 : the software. This notice grants no license of any kind, including but not limited to patent
16 : license, nor is any license granted by implication, estoppel or otherwise.
17 :
18 : Contributors are required to enter into the IVAS codec Public Collaboration agreement before making
19 : contributions.
20 :
21 : This software is provided "AS IS", without any express or implied warranties. The software is in the
22 : development stage. It is intended exclusively for experts who have experience with such software and
23 : solely for the purpose of inspection. All implied warranties of non-infringement, merchantability
24 : and fitness for a particular purpose are hereby disclaimed and excluded.
25 :
26 : Any dispute, controversy or claim arising under or in relation to providing this software shall be
27 : submitted to and settled by the final, binding jurisdiction of the courts of Munich, Germany in
28 : accordance with the laws of the Federal Republic of Germany excluding its conflict of law rules and
29 : the United Nations Convention on Contracts on the International Sales of Goods.
30 :
31 : *******************************************************************************************************/
32 :
33 : /*====================================================================================
34 : EVS Codec 3GPP TS26.443 Nov 04, 2021. Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0
35 : ====================================================================================*/
36 :
37 : #include <stdint.h>
38 : #include "options.h"
39 : #ifdef DEBUGGING
40 : #include "debug.h"
41 : #endif
42 : #include "prot.h"
43 : #include "rom_com.h"
44 : #include "wmc_auto.h"
45 :
46 : /*--------------------------------------------------------------------------*/
47 : /* Function diffcod() */
48 : /* */
49 : /* Differential coding for indices of quantized norms */
50 : /*--------------------------------------------------------------------------*/
51 :
52 9750 : void diffcod(
53 : const int16_t N, /* i : number of sub-vectors */
54 : int16_t *y, /* i/o: indices of quantized norms */
55 : int16_t *difidx /* o : differential code */
56 : )
57 : {
58 : int16_t i, k, r;
59 :
60 272249 : for ( i = N - 1; i > 0; i-- )
61 : {
62 262499 : r = i - 1;
63 262499 : k = y[i] - y[r];
64 262499 : if ( k < ( -15 ) )
65 : {
66 16 : y[r] = y[i] + 15;
67 : }
68 : }
69 :
70 272249 : for ( i = 1; i < N; i++ )
71 : {
72 262499 : r = i - 1;
73 262499 : k = y[i] - y[r];
74 262499 : if ( k > 16 )
75 : {
76 0 : k = 16;
77 0 : y[i] = y[r] + 16;
78 : }
79 262499 : difidx[r] = k + 15;
80 : }
81 :
82 9750 : return;
83 : }
84 :
85 :
86 : /*--------------------------------------------------------------------------
87 : * diffcod_lrmdct()
88 : *
89 : * Differential coding for indices of quantized norms
90 : *--------------------------------------------------------------------------*/
91 :
92 3 : void diffcod_lrmdct(
93 : const int16_t N, /* i : number of sub-vectors */
94 : const int16_t be_ref, /* i : band energy reference */
95 : int16_t *y, /* i/o: indices of quantized norms */
96 : int16_t *difidx, /* o : differential code */
97 : const int16_t is_transient /* i : transient flag */
98 : )
99 : {
100 : int16_t i, m, r;
101 : int16_t k;
102 : int16_t thr_l, thr_h;
103 :
104 3 : if ( is_transient )
105 : {
106 3 : thr_l = -15;
107 3 : thr_h = 16;
108 : }
109 : else
110 : {
111 0 : thr_l = -32;
112 0 : thr_h = 31;
113 : }
114 :
115 3 : difidx[0] = y[0] - be_ref;
116 3 : if ( difidx[0] > thr_h )
117 : {
118 0 : difidx[0] = thr_h;
119 0 : y[0] = be_ref + thr_h;
120 : }
121 :
122 3 : if ( difidx[0] < thr_l )
123 : {
124 0 : difidx[0] = thr_l;
125 0 : y[0] = be_ref + thr_l;
126 : }
127 :
128 3 : m = N - 1;
129 96 : for ( i = m; i > 0; i-- )
130 : {
131 93 : r = i - 1;
132 93 : k = y[i] - y[r];
133 93 : if ( k < thr_l )
134 : {
135 0 : y[r] = y[i] - thr_l;
136 : }
137 : }
138 :
139 96 : for ( i = 1; i < N; i++ )
140 : {
141 93 : r = i - 1;
142 93 : k = y[i] - y[r];
143 93 : if ( k > thr_h )
144 : {
145 0 : k = thr_h;
146 0 : y[i] = y[r] + thr_h;
147 : }
148 93 : difidx[i] = k;
149 : }
150 :
151 3 : return;
152 : }
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