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comparison intercom/g726/g726.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 File: G726.H 28-Feb-1991 (18:00:00)
4 ============================================================================
5
6 UGST/ITU-T G726 MODULE
7
8 GLOBAL FUNCTION PROTOTYPES
9
10 History:
11 28.Feb.92 v1.0 First version <simao@cpqd.br>
12 06.May.94 v2.0 Smart prototypes that work with many compilers <simao>
13 ============================================================================
14 */
15 #ifndef G726_defined
16 #define G726_defined 200
17
18 /* Smart function prototypes: for [ag]cc, VaxC, and [tb]cc */
19 #if !defined(ARGS)
20 #if (defined(__STDC__) || defined(VMS) || defined(__DECC) || defined(MSDOS) || defined(__MSDOS__)) || defined (__CYGWIN__) || defined (_MSC_VER)
21 #define ARGS(s) s
22 #else
23 #define ARGS(s) ()
24 #endif
25 #endif
26
27
28 /* State for G726 encoder and decoder */
29 typedef struct {
30 short sr0, sr1; /* Reconstructed signal with delays 0 and 1 */
31 short a1r, a2r; /* Triggered 2nd order predictor coeffs. */
32 short b1r; /* Triggered 6nd order predictor coeffs */
33 short b2r;
34 short b3r;
35 short b4r;
36 short b5r;
37 short b6r;
38 short dq5; /* Quantized difference signal with delays 5
39 * to 0 */
40 short dq4;
41 short dq3;
42 short dq2;
43 short dq1;
44 short dq0;
45 short dmsp; /* Short term average of the F(I) sequence */
46 short dmlp; /* Long term average of the F(I) sequence */
47 short apr; /* Triggered unlimited speed control
48 * parameter */
49 short yup; /* Fast quantizer scale factor */
50 short tdr; /* Triggered tone detector */
51 short pk0, pk1; /* sign of dq+sez with delays 0 and 1 */
52 long ylp; /* Slow quantizer scale factor */
53 } G726_state;
54
55 #ifdef VAXC
56 # define SHORT short
57 #else
58 # define SHORT int
59 #endif
60
61 /* Function prototypes */
62 void G726_encode ARGS((unsigned char *inp_buf, short *out_buf, long smpno,
63 char *law, SHORT rate, SHORT r, G726_state * state));
64 void G726_decode ARGS((short *inp_buf, unsigned char *out_buf, long smpno,
65 char *law, SHORT rate, SHORT r, G726_state * state));
66 void G726_expand ARGS((short *s, char *law, short *sl));
67 void G726_subta ARGS((short *sl, short *se, short *d));
68 void G726_log ARGS((short *d, short *dl, short *ds));
69 void G726_quan ARGS((SHORT rate, short *dln, short *ds, short *i));
70 void G726_subtb ARGS((short *dl, short *y, short *dln));
71 void G726_adda ARGS((short *dqln, short *y, short *dql));
72 void G726_antilog ARGS((short *dql, short *dqs, short *dq));
73 void G726_reconst ARGS((SHORT rate, short *i, short *dqln, short *dqs));
74 void G726_delaya ARGS((short *r, short *x, short *y));
75 void G726_delayb ARGS((short *r, short *x, short *y));
76 void G726_delayc ARGS((short *r, long *x, long *y));
77 void G726_delayd ARGS((short *r, short *x, short *y));
78 void G726_filtd ARGS((short *wi, short *y, short *yut));
79 void G726_filte ARGS((short *yup, long *yl, long *ylp));
80 void G726_functw ARGS((SHORT rate, short *i, short *wi));
81 void G726_limb ARGS((short *yut, short *yup));
82 void G726_mix ARGS((short *al, short *yu, long *yl, short *y));
83 void G726_filta ARGS((short *fi, short *dms, short *dmsp));
84 void G726_filtb ARGS((short *fi, short *dml, short *dmlp));
85 void G726_filtc ARGS((short *ax, short *ap, short *app));
86 void G726_functf ARGS((SHORT rate, short *i, short *fi));
87 void G726_lima ARGS((short *ap, short *al));
88 void G726_subtc ARGS((short *dmsp, short *dmlp, short *tdp, short *y,
89 short *ax));
90 void G726_triga ARGS((short *tr, short *app, short *apr));
91 void G726_accum ARGS((short *wa1, short *wa2, short *wb1, short *wb2,
92 short *wb3, short *wb4, short *wb5, short *wb6, short *se,
93 short *sez));
94 void G726_addb ARGS((short *dq, short *se, short *sr));
95 void G726_addc ARGS((short *dq, short *sez, short *pk0, short *sigpk));
96 void G726_floata ARGS((short *dq, short *dq0));
97 void G726_floatb ARGS((short *sr, short *sr0));
98 void G726_fmult ARGS((short *An, short *SRn, short *WAn));
99 void G726_limc ARGS((short *a2t, short *a2p));
100 void G726_limd ARGS((short *a1t, short *a2p, short *a1p));
101 void G726_trigb ARGS((short *tr, short *ap, short *ar));
102 void G726_upa1 ARGS((short *pk0, short *pk1, short *a1, short *sigpk,
103 short *a1t));
104 void G726_upa2 ARGS((short *pk0, short *pk1, short *pk2, short *a2,
105 short *a1, short *sigpk, short *a2t));
106 void G726_upb ARGS((SHORT rate, short *u, short *b, short *dq,
107 short *bp));
108 void G726_xor ARGS((short *dqn, short *dq, short *u));
109 void G726_tone ARGS((short *a2p, short *tdp));
110 void G726_trans ARGS((short *td, long *yl, short *dq, short *tr));
111 void G726_compress ARGS((short *sr, char *law, short *sp));
112 void G726_sync ARGS((SHORT rate, short *i, short *sp, short *dlnx,
113 short *dsx, char *law, short *sd));
114
115 /* Definitions for better user interface (?!) */
116 #ifndef IS_LOG
117 # define IS_LOG 0
118 #endif
119
120 #ifndef IS_LIN
121 # define IS_LIN 1
122 #endif
123
124 #ifndef IS_ADPCM
125 # define IS_ADPCM 2
126 #endif
127
128 #endif
129 /* .......................... End of G726.H ........................... */

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