Asterisk - The Open Source Telephony Project GIT-master-55f4e6d
gsm.h
Go to the documentation of this file.
1/*
2 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
3 * Universitaet Berlin. See the accompanying file "COPYRIGHT" for
4 * details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
5 */
6
7/*$Header$*/
8
9#ifndef GSM_H
10#define GSM_H
11
12#ifdef __cplusplus
13# define NeedFunctionPrototypes 1
14#endif
15
16#if __STDC__
17# define NeedFunctionPrototypes 1
18#endif
19
20#ifdef _NO_PROTO
21# undef NeedFunctionPrototypes
22#endif
23
24#ifdef NeedFunctionPrototypes
25# include <stdio.h> /* for FILE * */
26#endif
27
28#undef GSM_P
29#if NeedFunctionPrototypes
30# define GSM_P( protos ) protos
31#else
32# define GSM_P( protos ) ( /* protos */ )
33#endif
34
35/*
36 * Interface
37 */
38
39typedef struct gsm_state * gsm;
40typedef short gsm_signal; /* signed 16 bit */
41typedef unsigned char gsm_byte;
42typedef gsm_byte gsm_frame[33]; /* 33 * 8 bits */
43
44#define GSM_MAGIC 0xD /* 13 kbit/s RPE-LTP */
45
46#define GSM_PATCHLEVEL 10
47#define GSM_MINOR 0
48#define GSM_MAJOR 1
49
50#define GSM_OPT_VERBOSE 1
51#define GSM_OPT_FAST 2
52#define GSM_OPT_LTP_CUT 3
53#define GSM_OPT_WAV49 4
54#define GSM_OPT_FRAME_INDEX 5
55#define GSM_OPT_FRAME_CHAIN 6
56
57extern gsm gsm_create GSM_P((void));
58extern void gsm_destroy GSM_P((gsm));
59
60extern int gsm_print GSM_P((FILE *, gsm, gsm_byte *));
61extern int gsm_option GSM_P((gsm, int, int *));
62
63extern void gsm_encode GSM_P((gsm, gsm_signal *, gsm_byte *));
64extern int gsm_decode GSM_P((gsm, gsm_byte *, gsm_signal *));
65
66extern int gsm_explode GSM_P((gsm, gsm_byte *, gsm_signal *));
67extern void gsm_implode GSM_P((gsm, gsm_signal *, gsm_byte *));
68
69#undef GSM_P
70
71#endif /* GSM_H */
struct gsm_state * gsm
Definition: gsm.h:39
unsigned char gsm_byte
Definition: gsm.h:41
short gsm_signal
Definition: gsm.h:40
gsm_byte gsm_frame[33]
Definition: gsm.h:42
#define GSM_P(protos)
Definition: gsm.h:32