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comparison intercom/ilbc/iLBC_define.h @ 2:13be24d74cd2

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import intercom-0.4.1
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 09:57:52 +0200
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1:9cadc470e3da 2:13be24d74cd2
1
2 /******************************************************************
3
4 iLBC Speech Coder ANSI-C Source Code
5
6 iLBC_define.h
7
8 Copyright (C) The Internet Society (2004).
9 All Rights Reserved.
10
11 ******************************************************************/
12 #include <string.h>
13
14 #ifndef __iLBC_ILBCDEFINE_H
15 #define __iLBC_ILBCDEFINE_H
16
17 /* general codec settings */
18
19 #define FS (float)8000.0
20 #define BLOCKL_20MS 160
21 #define BLOCKL_30MS 240
22 #define BLOCKL_MAX 240
23 #define NSUB_20MS 4
24 #define NSUB_30MS 6
25 #define NSUB_MAX 6
26 #define NASUB_20MS 2
27
28
29
30
31
32 #define NASUB_30MS 4
33 #define NASUB_MAX 4
34 #define SUBL 40
35 #define STATE_LEN 80
36 #define STATE_SHORT_LEN_30MS 58
37 #define STATE_SHORT_LEN_20MS 57
38
39 /* LPC settings */
40
41 #define LPC_FILTERORDER 10
42 #define LPC_CHIRP_SYNTDENUM (float)0.9025
43 #define LPC_CHIRP_WEIGHTDENUM (float)0.4222
44 #define LPC_LOOKBACK 60
45 #define LPC_N_20MS 1
46 #define LPC_N_30MS 2
47 #define LPC_N_MAX 2
48 #define LPC_ASYMDIFF 20
49 #define LPC_BW (float)60.0
50 #define LPC_WN (float)1.0001
51 #define LSF_NSPLIT 3
52 #define LSF_NUMBER_OF_STEPS 4
53 #define LPC_HALFORDER (LPC_FILTERORDER/2)
54
55 /* cb settings */
56
57 #define CB_NSTAGES 3
58 #define CB_EXPAND 2
59 #define CB_MEML 147
60 #define CB_FILTERLEN 2*4
61 #define CB_HALFFILTERLEN 4
62 #define CB_RESRANGE 34
63 #define CB_MAXGAIN (float)1.3
64
65 /* enhancer */
66
67 #define ENH_BLOCKL 80 /* block length */
68 #define ENH_BLOCKL_HALF (ENH_BLOCKL/2)
69 #define ENH_HL 3 /* 2*ENH_HL+1 is number blocks
70 in said second sequence */
71 #define ENH_SLOP 2 /* max difference estimated and
72 correct pitch period */
73 #define ENH_PLOCSL 20 /* pitch-estimates and pitch-
74 locations buffer length */
75 #define ENH_OVERHANG 2
76 #define ENH_UPS0 4 /* upsampling rate */
77 #define ENH_FL0 3 /* 2*FLO+1 is the length of
78 each filter */
79 #define ENH_VECTL (ENH_BLOCKL+2*ENH_FL0)
80
81
82
83
84
85 #define ENH_CORRDIM (2*ENH_SLOP+1)
86 #define ENH_NBLOCKS (BLOCKL_MAX/ENH_BLOCKL)
87 #define ENH_NBLOCKS_EXTRA 5
88 #define ENH_NBLOCKS_TOT 8 /* ENH_NBLOCKS +
89 ENH_NBLOCKS_EXTRA */
90 #define ENH_BUFL (ENH_NBLOCKS_TOT)*ENH_BLOCKL
91 #define ENH_ALPHA0 (float)0.05
92
93 /* Down sampling */
94
95 #define FILTERORDER_DS 7
96 #define DELAY_DS 3
97 #define FACTOR_DS 2
98
99 /* bit stream defs */
100
101 #define NO_OF_BYTES_20MS 38
102 #define NO_OF_BYTES_30MS 50
103 #define NO_OF_WORDS_20MS 19
104 #define NO_OF_WORDS_30MS 25
105 #define STATE_BITS 3
106 #define BYTE_LEN 8
107 #define ULP_CLASSES 3
108
109 /* help parameters */
110
111 #define FLOAT_MAX (float)1.0e37
112 #define EPS (float)2.220446049250313e-016
113 #define PI (float)3.14159265358979323846
114 #define MIN_SAMPLE -32768
115 #define MAX_SAMPLE 32767
116 #define TWO_PI (float)6.283185307
117 #define PI2 (float)0.159154943
118
119 /* type definition encoder instance */
120 typedef struct iLBC_ULP_Inst_t_ {
121 int lsf_bits[6][ULP_CLASSES + 2];
122 int start_bits[ULP_CLASSES + 2];
123 int startfirst_bits[ULP_CLASSES + 2];
124 int scale_bits[ULP_CLASSES + 2];
125 int state_bits[ULP_CLASSES + 2];
126 int extra_cb_index[CB_NSTAGES][ULP_CLASSES + 2];
127 int extra_cb_gain[CB_NSTAGES][ULP_CLASSES + 2];
128 int cb_index[NSUB_MAX][CB_NSTAGES][ULP_CLASSES + 2];
129 int cb_gain[NSUB_MAX][CB_NSTAGES][ULP_CLASSES + 2];
130 } iLBC_ULP_Inst_t;
131
132 /* type definition encoder instance */
133
134
135
136
137
138 typedef struct iLBC_Enc_Inst_t_ {
139
140 /* flag for frame size mode */
141 int mode;
142
143 /* basic parameters for different frame sizes */
144 int blockl;
145 int nsub;
146 int nasub;
147 int no_of_bytes, no_of_words;
148 int lpc_n;
149 int state_short_len;
150 const iLBC_ULP_Inst_t *ULP_inst;
151
152 /* analysis filter state */
153 float anaMem[LPC_FILTERORDER];
154
155 /* old lsf parameters for interpolation */
156 float lsfold[LPC_FILTERORDER];
157 float lsfdeqold[LPC_FILTERORDER];
158
159 /* signal buffer for LP analysis */
160 float lpc_buffer[LPC_LOOKBACK + BLOCKL_MAX];
161
162 /* state of input HP filter */
163 float hpimem[4];
164
165 } iLBC_Enc_Inst_t;
166
167 /* type definition decoder instance */
168 typedef struct iLBC_Dec_Inst_t_ {
169
170 /* flag for frame size mode */
171 int mode;
172
173 /* basic parameters for different frame sizes */
174 int blockl;
175 int nsub;
176 int nasub;
177 int no_of_bytes, no_of_words;
178 int lpc_n;
179 int state_short_len;
180 const iLBC_ULP_Inst_t *ULP_inst;
181
182 /* synthesis filter state */
183 float syntMem[LPC_FILTERORDER];
184
185 /* old LSF for interpolation */
186
187
188
189
190
191 float lsfdeqold[LPC_FILTERORDER];
192
193 /* pitch lag estimated in enhancer and used in PLC */
194 int last_lag;
195
196 /* PLC state information */
197 int prevLag, consPLICount, prevPLI, prev_enh_pl;
198 float prevLpc[LPC_FILTERORDER + 1];
199 float prevResidual[NSUB_MAX * SUBL];
200 float per;
201 unsigned long seed;
202
203 /* previous synthesis filter parameters */
204 float old_syntdenum[(LPC_FILTERORDER + 1) * NSUB_MAX];
205
206 /* state of output HP filter */
207 float hpomem[4];
208
209 /* enhancer state information */
210 int use_enhancer;
211 float enh_buf[ENH_BUFL];
212 float enh_period[ENH_NBLOCKS_TOT];
213
214 } iLBC_Dec_Inst_t;
215
216 #endif

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