gsm.h

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00001 /*
00002  * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
00003  * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
00004  * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
00005  */
00006 
00007 /*$Header$*/
00008 
00009 #ifndef  GSM_H
00010 #define  GSM_H
00011 
00012 #ifdef __cplusplus
00013 #  define   NeedFunctionPrototypes  1
00014 #endif
00015 
00016 #if __STDC__
00017 #  define   NeedFunctionPrototypes  1
00018 #endif
00019 
00020 #ifdef _NO_PROTO
00021 #  undef NeedFunctionPrototypes
00022 #endif
00023 
00024 #ifdef NeedFunctionPrototypes
00025 #   include <stdio.h>      /* for FILE *  */
00026 #endif
00027 
00028 #undef GSM_P
00029 #if NeedFunctionPrototypes
00030 #  define   GSM_P( protos )   protos
00031 #else
00032 #  define  GSM_P( protos ) ( /* protos */ )
00033 #endif
00034 
00035 /*
00036  * Interface
00037  */
00038 
00039 typedef struct gsm_state *    gsm;
00040 typedef short           gsm_signal;    /* signed 16 bit */
00041 typedef unsigned char      gsm_byte;
00042 typedef gsm_byte     gsm_frame[33];    /* 33 * 8 bits  */
00043 
00044 #define  GSM_MAGIC      0xD         /* 13 kbit/s RPE-LTP */
00045 
00046 #define  GSM_PATCHLEVEL    10
00047 #define  GSM_MINOR      0
00048 #define  GSM_MAJOR      1
00049 
00050 #define  GSM_OPT_VERBOSE      1
00051 #define  GSM_OPT_FAST      2
00052 #define  GSM_OPT_LTP_CUT      3
00053 #define  GSM_OPT_WAV49     4
00054 #define  GSM_OPT_FRAME_INDEX  5
00055 #define  GSM_OPT_FRAME_CHAIN  6
00056 
00057 extern gsm  gsm_create  GSM_P((void));
00058 extern void gsm_destroy GSM_P((gsm));  
00059 
00060 extern int  gsm_print   GSM_P((FILE *, gsm, gsm_byte  *));
00061 extern int  gsm_option  GSM_P((gsm, int, int *));
00062 
00063 extern void gsm_encode  GSM_P((gsm, gsm_signal *, gsm_byte  *));
00064 extern int  gsm_decode  GSM_P((gsm, gsm_byte   *, gsm_signal *));
00065 
00066 extern int  gsm_explode GSM_P((gsm, gsm_byte   *, gsm_signal *));
00067 extern void gsm_implode GSM_P((gsm, gsm_signal *, gsm_byte   *));
00068 
00069 #undef   GSM_P
00070 
00071 #endif   /* GSM_H */

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