Asterisk - The Open Source Telephony Project  18.5.0
gsm.h
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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 
39 typedef struct gsm_state * gsm;
40 typedef short gsm_signal; /* signed 16 bit */
41 typedef unsigned char gsm_byte;
42 typedef 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 
57 extern gsm gsm_create GSM_P((void));
58 extern void gsm_destroy GSM_P((gsm));
59 
60 extern int gsm_print GSM_P((FILE *, gsm, gsm_byte *));
61 extern int gsm_option GSM_P((gsm, int, int *));
62 
63 extern void gsm_encode GSM_P((gsm, gsm_signal *, gsm_byte *));
64 extern int gsm_decode GSM_P((gsm, gsm_byte *, gsm_signal *));
65 
66 extern int gsm_explode GSM_P((gsm, gsm_byte *, gsm_signal *));
67 extern void gsm_implode GSM_P((gsm, gsm_signal *, gsm_byte *));
68 
69 #undef GSM_P
70 
71 #endif /* GSM_H */
unsigned char gsm_byte
Definition: gsm.h:41
gsm_byte gsm_frame[33]
Definition: gsm.h:42
struct gsm_state * gsm
Definition: gsm.h:39
#define GSM_P(protos)
Definition: gsm.h:32
short gsm_signal
Definition: gsm.h:40