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 : #include <stdint.h>
34 : #include <math.h>
35 : #include "options.h"
36 : #include "ivas_prot.h"
37 : #include "prot.h"
38 : #ifdef DEBUGGING
39 : #include "debug.h"
40 : #endif
41 : #include "wmc_auto.h"
42 :
43 :
44 : /*-------------------------------------------------------------------*
45 : * ivas_ism_dtx_dec()
46 : *
47 : * ISM DTX Metadata decoding routine
48 : *-------------------------------------------------------------------*/
49 :
50 6399 : void ivas_ism_dtx_dec(
51 : Decoder_Struct *st_ivas, /* i/o: IVAS decoder structure */
52 : int16_t *nb_bits_metadata /* o : number of metadata bits */
53 : )
54 : {
55 : int16_t ch, nchan_ism, nchan_ism_prev;
56 : int32_t ivas_total_brate;
57 : int16_t md_diff_flag[MAX_NUM_OBJECTS];
58 : int16_t flag_noisy_speech, sce_id_dtx;
59 : Decoder_State *st;
60 :
61 6399 : ivas_total_brate = st_ivas->hDecoderConfig->ivas_total_brate;
62 :
63 :
64 6399 : nchan_ism_prev = st_ivas->nchan_ism;
65 :
66 6399 : if ( !st_ivas->bfi && ivas_total_brate == IVAS_SID_5k2 )
67 : {
68 : /* 'nchan_ism' was read in ivas_dec_setup() */
69 1626 : nchan_ism = st_ivas->nchan_ism;
70 :
71 : /* ism_mode was read in ivas_dec_setup() as well as reconfiguration ivas_ism_dec_config() */
72 : }
73 : else
74 : {
75 4773 : nchan_ism = nchan_ism_prev;
76 : }
77 :
78 : /* Metadata decoding and dequantization */
79 6399 : ivas_ism_metadata_sid_dec( st_ivas->hSCE, ivas_total_brate, st_ivas->bfi, nchan_ism, st_ivas->nchan_transport, st_ivas->ism_mode,
80 6399 : &flag_noisy_speech, &sce_id_dtx, st_ivas->hIsmMetaData, nb_bits_metadata );
81 :
82 6399 : if ( ivas_total_brate == IVAS_SID_5k2 && !st_ivas->bfi )
83 : {
84 1626 : if ( st_ivas->hParamIsmDec != NULL )
85 : {
86 321 : st_ivas->hParamIsmDec->hParamIsm->flag_noisy_speech = flag_noisy_speech;
87 : }
88 :
89 1626 : st_ivas->hISMDTX.sce_id_dtx = sce_id_dtx;
90 : }
91 :
92 6399 : set_s( md_diff_flag, 1, nchan_ism );
93 :
94 6399 : if ( st_ivas->ism_mode == ISM_MODE_PARAM )
95 : {
96 4860 : for ( ch = 0; ch < nchan_ism; ch++ )
97 : {
98 3888 : st_ivas->hParamIsmDec->azimuth_values[ch] = st_ivas->hIsmMetaData[ch]->azimuth;
99 3888 : st_ivas->hParamIsmDec->elevation_values[ch] = st_ivas->hIsmMetaData[ch]->elevation;
100 : }
101 : }
102 :
103 : /* synch common seed between SCEs */
104 6399 : if ( st_ivas->ism_mode == ISM_MODE_DISC )
105 : {
106 19269 : for ( ch = 0; ch < nchan_ism; ++ch )
107 : {
108 13842 : st_ivas->hSCE[ch]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed = st_ivas->hSCE[st_ivas->hISMDTX.sce_id_dtx]->hCoreCoder[0]->hFdCngDec->hFdCngCom->seed;
109 : }
110 : }
111 :
112 6399 : update_last_metadata( nchan_ism, st_ivas->hIsmMetaData, md_diff_flag );
113 :
114 6399 : st_ivas->hISMDTX.ism_dtx_hangover_cnt = 0;
115 :
116 6399 : if ( ivas_total_brate == IVAS_SID_5k2 && !st_ivas->bfi )
117 : {
118 6381 : for ( ch = 0; ch < st_ivas->nchan_transport; ch++ )
119 : {
120 4755 : nb_bits_metadata[ch] = nb_bits_metadata[sce_id_dtx];
121 : }
122 : }
123 :
124 6399 : if ( !st_ivas->bfi )
125 : {
126 22185 : for ( ch = 0; ch < st_ivas->nchan_transport; ch++ )
127 : {
128 15786 : st = st_ivas->hSCE[ch]->hCoreCoder[0];
129 15786 : st->bit_stream = st_ivas->hSCE[0]->hCoreCoder[0]->bit_stream;
130 15786 : st->next_bit_pos = 0; /* note: needed in paramISM -> discISM switching */
131 15786 : st->cng_ism_flag = 1;
132 15786 : st->L_frame = min( st->L_frame, L_FRAME16k ); /* note: needed for switching from active frame with L_frame=640 to CNG in object with no SID */
133 : }
134 : }
135 :
136 6399 : return;
137 : }
138 :
139 :
140 : /*-------------------------------------------------------------------*
141 : * ivs_ism_dtx_limit_noise_energy_for_near_silence()
142 : *
143 : * for DTX frames where the energy of the sent noise estimate of the dominant object
144 : * is near silence, limit the other objects CNG energies to the same level
145 : *-------------------------------------------------------------------*/
146 :
147 6399 : void ivas_ism_dtx_limit_noise_energy_for_near_silence(
148 : SCE_DEC_HANDLE hSCE[], /* i/o: SCE decoder structures */
149 : const int16_t sce_id_dtx, /* i : SCE DTX ID */
150 : const int16_t nchan_transport /* i : number of transport channels */
151 : )
152 : {
153 : float fac, cng_noise_nrg_obj, cng_noise_nrg_dominant;
154 : int16_t ch, cng_noise_level_len;
155 : HANDLE_FD_CNG_COM hFdCngCom;
156 :
157 6399 : hFdCngCom = hSCE[sce_id_dtx]->hCoreCoder[0]->hFdCngDec->hFdCngCom;
158 6399 : cng_noise_level_len = hFdCngCom->stopFFTbin - hFdCngCom->startBand;
159 6399 : cng_noise_nrg_dominant = dotp( hFdCngCom->cngNoiseLevel, hFdCngCom->cngNoiseLevel, cng_noise_level_len );
160 :
161 6399 : if ( cng_noise_nrg_dominant < 1.f )
162 : {
163 8376 : for ( ch = 0; ch < nchan_transport; ch++ )
164 : {
165 6129 : if ( ch == sce_id_dtx )
166 : {
167 2247 : continue;
168 : }
169 :
170 3882 : hFdCngCom = hSCE[ch]->hCoreCoder[0]->hFdCngDec->hFdCngCom;
171 3882 : cng_noise_level_len = hFdCngCom->stopFFTbin - hFdCngCom->startBand;
172 3882 : cng_noise_nrg_obj = dotp( hFdCngCom->cngNoiseLevel, hFdCngCom->cngNoiseLevel, cng_noise_level_len );
173 :
174 3882 : if ( cng_noise_nrg_obj > cng_noise_nrg_dominant )
175 : {
176 930 : fac = sqrtf( cng_noise_nrg_dominant / cng_noise_nrg_obj );
177 930 : v_multc( hFdCngCom->cngNoiseLevel, fac, hFdCngCom->cngNoiseLevel, cng_noise_level_len );
178 : }
179 : }
180 : }
181 :
182 6399 : return;
183 : }
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