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1 /*
2  * Copyright (C) 2003 - 2016 Sony Corporation
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 express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "ldac.h"
18 
19 /***************************************************************************************************
20     Allocate Memory
21 ***************************************************************************************************/
alloc_encode_ldac(SFINFO * p_sfinfo)22 static LDAC_RESULT alloc_encode_ldac(
23 SFINFO *p_sfinfo)
24 {
25     LDAC_RESULT result = LDAC_S_OK;
26     CFG *p_cfg = &p_sfinfo->cfg;
27     int ich;
28     int nchs = p_cfg->ch;
29     int nbks = gaa_block_setting_ldac[p_cfg->chconfig_id][1];
30 
31     /* Allocate AC */
32     for (ich = 0; ich < nchs; ich++) {
33         p_sfinfo->ap_ac[ich] = (AC *)calloc_ldac(p_sfinfo, 1, sizeof(AC));
34         if (p_sfinfo->ap_ac[ich] != (AC *)NULL) {
35             p_sfinfo->ap_ac[ich]->p_acsub = (ACSUB *)calloc_ldac(p_sfinfo, 1, sizeof(ACSUB));
36             if (p_sfinfo->ap_ac[ich]->p_acsub == (ACSUB *)NULL) {
37                 result = LDAC_E_FAIL;
38                 break;
39             }
40         }
41         else {
42             result = LDAC_E_FAIL;
43             break;
44         }
45     }
46 
47     if (result != LDAC_S_OK) {
48         return result;
49     }
50 
51     /* Allocate AB */
52     p_sfinfo->p_ab = (AB *)calloc_ldac(p_sfinfo, nbks, sizeof(AB));
53     if (p_sfinfo->p_ab == (AB *)NULL) {
54         result = LDAC_E_FAIL;
55     }
56 
57     return result;
58 }
59 
60 /***************************************************************************************************
61     Initialize Memory
62 ***************************************************************************************************/
init_encode_ldac(SFINFO * p_sfinfo)63 DECLFUNC LDAC_RESULT init_encode_ldac(
64 SFINFO *p_sfinfo)
65 {
66     LDAC_RESULT result = LDAC_S_OK;
67     CFG *p_cfg = &p_sfinfo->cfg;
68     AB *p_ab;
69     int ibk, ich;
70     int blk_type, blk_nchs;
71     int ch_offset = 0;
72     int chconfig_id = p_cfg->chconfig_id;
73     int nbks = gaa_block_setting_ldac[chconfig_id][1];
74 
75     if (alloc_encode_ldac(p_sfinfo) == LDAC_E_FAIL) {
76         p_sfinfo->error_code = LDAC_ERR_ALLOC_MEMORY;
77         return LDAC_E_FAIL;
78     }
79 
80     p_sfinfo->error_code = LDAC_ERR_NONE;
81     p_cfg->frame_status = LDAC_FRMSTAT_LEV_0;
82 
83     /* Set AB information */
84     p_ab = p_sfinfo->p_ab;
85     for (ibk = 0; ibk < nbks; ibk++){
86         p_ab->blk_type = blk_type = gaa_block_setting_ldac[chconfig_id][ibk+2];
87         p_ab->blk_nchs = blk_nchs = get_block_nchs_ldac(blk_type);
88         p_ab->p_smplrate_id = &p_cfg->smplrate_id;
89         p_ab->p_error_code = &p_sfinfo->error_code;
90 
91         /* Set AC Information */
92         for (ich = 0; ich < blk_nchs; ich++) {
93             p_ab->ap_ac[ich] = p_sfinfo->ap_ac[ch_offset++];
94             p_ab->ap_ac[ich]->p_ab = p_ab;
95             p_ab->ap_ac[ich]->ich = ich;
96             p_ab->ap_ac[ich]->frmana_cnt = 0;
97         }
98 
99         p_ab++;
100     }
101 
102     calc_initial_bits_ldac(p_sfinfo);
103 
104     return result;
105 }
106 
107 /***************************************************************************************************
108     Calculate Initial Bits
109 ***************************************************************************************************/
calc_initial_bits_ldac(SFINFO * p_sfinfo)110 DECLFUNC void calc_initial_bits_ldac(
111 SFINFO *p_sfinfo)
112 {
113     CFG *p_cfg = &p_sfinfo->cfg;
114     AB *p_ab = p_sfinfo->p_ab;
115     int ibk;
116     int blk_type;
117     int nbits_ab, nbits_ac;
118     int chconfig_id = p_cfg->chconfig_id;
119     int nbks = gaa_block_setting_ldac[chconfig_id][1];
120 
121     nbits_ac = p_cfg->frame_length * LDAC_BYTESIZE / p_cfg->ch;
122 
123     for (ibk = 0; ibk < nbks; ibk++){
124         blk_type = gaa_block_setting_ldac[chconfig_id][ibk+2];
125 
126         if (blk_type == LDAC_BLKID_STEREO){
127             nbits_ab = (nbits_ac * 2 / LDAC_BYTESIZE) * LDAC_BYTESIZE;
128         }
129         else{
130             nbits_ab = (nbits_ac / LDAC_BYTESIZE) * LDAC_BYTESIZE;
131         }
132         p_ab->nbits_ab = nbits_ab;
133 
134         p_ab++;
135     }
136 
137     return;
138 }
139 
140 /***************************************************************************************************
141     Free Memory
142 ***************************************************************************************************/
free_encode_ldac(SFINFO * p_sfinfo)143 DECLFUNC void free_encode_ldac(
144 SFINFO *p_sfinfo)
145 {
146     int ich;
147     int nchs = p_sfinfo->cfg.ch;
148 
149     /* Free AB */
150     if (p_sfinfo->p_ab != (AB *)NULL) {
151         free(p_sfinfo->p_ab);
152         p_sfinfo->p_ab = (AB *)NULL;
153     }
154 
155     /* Free AC */
156     for (ich = 0; ich < nchs; ich++) {
157         if (p_sfinfo->ap_ac[ich] != (AC *)NULL) {
158             if (p_sfinfo->ap_ac[ich]->p_acsub != (ACSUB *)NULL) {
159                 free(p_sfinfo->ap_ac[ich]->p_acsub);
160                 p_sfinfo->ap_ac[ich]->p_acsub = (ACSUB *)NULL;
161             }
162             free(p_sfinfo->ap_ac[ich]);
163             p_sfinfo->ap_ac[ich] = (AC *)NULL;
164         }
165     }
166 
167     return;
168 }
169 
170 /***************************************************************************************************
171     Encode Audio Block
172 ***************************************************************************************************/
encode_audio_block_ldac(AB * p_ab)173 static int encode_audio_block_ldac(
174 AB *p_ab)
175 {
176     AC *p_ac;
177     int ich;
178     int nchs = p_ab->blk_nchs;
179 
180     for (ich = 0; ich < nchs; ich++) {
181         p_ac = p_ab->ap_ac[ich];
182 
183         norm_spectrum_ldac(p_ac);
184     }
185 
186     if (!alloc_bits_ldac(p_ab)) {
187         return LDAC_FALSE;
188     }
189 
190     for (ich = 0; ich < nchs; ich++) {
191         p_ac = p_ab->ap_ac[ich];
192 
193         quant_spectrum_ldac(p_ac);
194 
195         quant_residual_ldac(p_ac);
196     }
197 
198     return LDAC_TRUE;
199 }
200 
201 /***************************************************************************************************
202     Encode
203 ***************************************************************************************************/
encode_ldac(SFINFO * p_sfinfo,int nbands,int grad_mode,int grad_qu_l,int grad_qu_h,int grad_os_l,int grad_os_h,int abc_status)204 DECLFUNC int encode_ldac(
205 SFINFO *p_sfinfo,
206 int nbands,
207 int grad_mode,
208 int grad_qu_l,
209 int grad_qu_h,
210 int grad_os_l,
211 int grad_os_h,
212 int abc_status)
213 {
214     AB *p_ab = p_sfinfo->p_ab;
215     int ibk;
216     int nbks = gaa_block_setting_ldac[p_sfinfo->cfg.chconfig_id][1];
217 
218     for (ibk = 0; ibk < nbks; ibk++){
219         p_ab->nbands = nbands;
220         p_ab->nqus = ga_nqus_ldac[nbands];
221         p_ab->grad_mode = grad_mode;
222         p_ab->grad_qu_l = grad_qu_l;
223         p_ab->grad_qu_h = grad_qu_h;
224         p_ab->grad_os_l = grad_os_l;
225         p_ab->grad_os_h = grad_os_h;
226         p_ab->abc_status = abc_status;
227 
228         if (!encode_audio_block_ldac(p_ab)) {
229             return LDAC_ERR_NON_FATAL_ENCODE;
230         }
231 
232         p_ab++;
233     }
234 
235     return LDAC_ERR_NONE;
236 }
237 
238