www.pudn.com > SMV_Code.rar > dtmf.h

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/*===================================================================*/ 
 
#ifndef _DTMF_H_ 
#define _DTMF_H_ 
 
#include  
 
#define  Min(a,b) (ab ? a:b) 
 
typedef struct { 
    short  DtmfSaveMem1[2];    /* save filter states for 1st row freq       */ 
    short  DtmfSaveMemLast1[2];/* filter states for 1st row freq last block */ 
    short  DtmfSaveMem4[2];    /* save filter states for 4th row freq       */ 
    short  DtmfSaveMemLast4[2];/* filter states for 4th row freq last block */ 
    short  DtmfEnergy[11];     /* energy template                           */ 
    short  PossibleDtmfLast;   /* test of DtmfDuration > 1 for last block */ 
    short  DtmfDigit;          /* current digit result                      */ 
    short  DtmfDigitLast;      /* last detected digit                       */ 
    short  DtmfDetectStat;     /* status of detector                        */ 
    short  DtmfDuration;       /* duration of tone                          */ 
    short  DtmfPauseLatch;     /* pause detected flag                       */ 
    short  DebugFlag;          /* 1=debugging on,0=debugging off            */ 
    FILE*  DebugFileP;         /* output file for debugging info            */ 
} DTMF_DETECTOR; 
 
typedef  double Acc; 
extern  short   Dtmf20ms(DTMF_DETECTOR*,short*,short*); 
extern  void  DtmfInit(DTMF_DETECTOR*); 
extern  void  dtmf_tone_gen( short,short,short,double*); 
extern  short int dtmf_enc_flag; 
extern  short int dtmf_digit; 
extern  short int dtmf_digit_last; 
extern  short int dtmf_option; 
 
#endif