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 : * decode_envelope_indices()
48 : *
49 : * Decode envelope indices
50 : *------------------------------------------------------------------------*/
51 :
52 : /*! r: Number of bits */
53 24801 : int16_t decode_envelope_indices(
54 : Decoder_State *st, /* i/o: decoder state structure */
55 : const int16_t start_norm, /* i : starting band index */
56 : const int16_t num_sfm, /* i : Number of subbands */
57 : const int16_t numnrmibits, /* i : Bitrate of fall-back coding mode */
58 : int16_t *difidx, /* o : Diff indices/encoded diff indices */
59 : const int16_t flag_HQ2, /* i : indicator of HQ2 core */
60 : const int16_t is_transient /* i : transient flag */
61 : )
62 : {
63 : int16_t hcode_l;
64 : int16_t i;
65 : int16_t LCmode;
66 :
67 24801 : if ( flag_HQ2 == LOW_RATE_HQ_CORE || flag_HQ2 == LOW_RATE_HQ_CORE_TRAN )
68 : {
69 96 : LCmode = get_next_indice( st, BITS_DE_HMODE );
70 96 : difidx[start_norm] = get_next_indice( st, BITS_DE_FCOMP );
71 : }
72 : else
73 : {
74 24705 : LCmode = get_next_indice( st, 2 );
75 24705 : difidx[start_norm] = get_next_indice( st, NORM0_BITS );
76 : }
77 :
78 24801 : if ( is_transient && flag_HQ2 == LOW_RATE_HQ_CORE_TRAN )
79 : {
80 6 : hcode_l = 0;
81 6 : if ( LCmode == 1 )
82 : {
83 6 : hdecnrm_tran( st, num_sfm, &difidx[start_norm + 1] );
84 192 : for ( i = start_norm + 1; i < start_norm + num_sfm; i++ )
85 : {
86 186 : hcode_l += huffsizn_tran[difidx[i]];
87 : }
88 : }
89 : else
90 : {
91 0 : hdecnrm_context( st, num_sfm, &difidx[start_norm], &hcode_l );
92 : }
93 : }
94 : else
95 : {
96 24795 : hcode_l = 0;
97 24795 : if ( LCmode == 0 )
98 : {
99 14409 : hdecnrm_context( st, num_sfm, &difidx[start_norm], &hcode_l );
100 : }
101 10386 : else if ( LCmode == 1 )
102 : {
103 7053 : hdecnrm_resize( st, num_sfm, &difidx[start_norm + 1] );
104 :
105 212559 : for ( i = start_norm + 1; i < start_norm + num_sfm; i++ )
106 : {
107 205506 : hcode_l += resize_huffsizn[difidx[i]];
108 : }
109 :
110 205506 : for ( i = start_norm + 2; i < start_norm + num_sfm; i++ )
111 : {
112 198453 : if ( difidx[i - 1] > 17 )
113 : {
114 35424 : difidx[i] = difidx[i] - min( difidx[i - 1] - 17, 3 );
115 : }
116 :
117 198453 : if ( difidx[i - 1] < 13 )
118 : {
119 21618 : difidx[i] = difidx[i] - max( difidx[i - 1] - 13, -3 );
120 : }
121 : }
122 : }
123 3333 : else if ( LCmode == 2 )
124 : {
125 2961 : hdecnrm( st, num_sfm, &difidx[start_norm + 1] );
126 83166 : for ( i = start_norm + 1; i < start_norm + num_sfm; i++ )
127 : {
128 80205 : hcode_l += huffsizn[difidx[i]];
129 : }
130 : }
131 : else
132 : {
133 8616 : for ( i = start_norm + 1; i < start_norm + num_sfm; i++ )
134 : {
135 8244 : difidx[i] = get_next_indice( st, NORMI_BITS );
136 : }
137 372 : hcode_l = numnrmibits;
138 : }
139 : }
140 :
141 24801 : return hcode_l;
142 : }
143 :
144 : /*------------------------------------------------------------------------*
145 : * dequantize_norms()
146 : *
147 : * De-quantization of norms
148 : *------------------------------------------------------------------------*/
149 :
150 : /*! r: Number of bits */
151 24705 : void dequantize_norms(
152 : Decoder_State *st, /* i/o: decoder state structure */
153 : const int16_t start_norm, /* i : First SDE encoded norm */
154 : const int16_t num_sfm, /* i : Number of norms */
155 : const int16_t is_transient, /* i : Transient flag */
156 : int16_t *ynrm, /* o : Decoded norm indices */
157 : int16_t *normqlg2 /* o : Log2 of decoded norms */
158 : )
159 : {
160 : int16_t i, j, k;
161 : int16_t idxbuf[NB_SFM];
162 :
163 : /* First sub-frame */
164 24705 : normqlg2[start_norm] = dicnlg2[ynrm[start_norm]];
165 :
166 : /* Other sub-frames */
167 24705 : if ( is_transient )
168 : {
169 : /* Recover quantization indices and quantized norms */
170 1617 : idxbuf[0] = ynrm[0];
171 68202 : for ( i = 1; i < num_sfm; i++ )
172 : {
173 66585 : idxbuf[i] = ynrm[i] + idxbuf[i - 1] - 15;
174 : /* safety check in case of bit errors */
175 66585 : if ( idxbuf[i] < 0 || idxbuf[i] > 39 )
176 : {
177 0 : idxbuf[i] = 39;
178 0 : st->BER_detect = 1;
179 : }
180 : }
181 :
182 1617 : recovernorm( idxbuf, ynrm, normqlg2, num_sfm );
183 : }
184 : else
185 : {
186 664065 : for ( i = start_norm + 1; i < start_norm + num_sfm; i++ )
187 : {
188 640977 : j = i - 1;
189 640977 : k = ynrm[j] - 15;
190 640977 : ynrm[i] = ynrm[i] + k;
191 : /* safety check in case of bit errors */
192 640977 : if ( ynrm[i] < 0 || ynrm[i] > 39 )
193 : {
194 0 : ynrm[i] = 39;
195 0 : st->BER_detect = 1;
196 : }
197 640977 : normqlg2[i] = dicnlg2[ynrm[i]];
198 : }
199 : }
200 :
201 24705 : return;
202 : }
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