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.
13 # define NeedFunctionPrototypes 1
17 # define NeedFunctionPrototypes 1
21 # undef NeedFunctionPrototypes
24 #ifdef NeedFunctionPrototypes
25 # include <stdio.h> /* for FILE * */
29 #if NeedFunctionPrototypes
30 # define GSM_P( protos ) protos
32 # define GSM_P( protos ) ( /* protos */ )
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 */
44 #define GSM_MAGIC 0xD /* 13 kbit/s RPE-LTP */
46 #define GSM_PATCHLEVEL 10
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
57 #define GSM_SAMPLES_PER_FRAME 160
59 extern gsm gsm_create GSM_P((void));
60 extern void gsm_destroy GSM_P((gsm));
62 extern int gsm_print GSM_P((FILE *, gsm, gsm_byte *));
63 extern int gsm_option GSM_P((gsm, int, int *));
65 extern void gsm_encode GSM_P((gsm, gsm_signal *, gsm_byte *));
66 extern int gsm_decode GSM_P((gsm, gsm_byte *, gsm_signal *));
68 extern int gsm_explode GSM_P((gsm, gsm_byte *, gsm_signal *));
69 extern void gsm_implode GSM_P((gsm, gsm_signal *, gsm_byte *));