codec.h

本程序是基于ACELP算法编写的语音编解码程序

#define FRAME_SIZE				120   
#define COMPRESSED_FRAME_SIZE	15
typedef struct      acelp_state * 	acelp;

typedef unsigned char	acelp_frame[COMPRESSED_FRAME_SIZE];	 

extern acelp  Init( short int );	// param: =1 for compressor, =0 for decompressor
extern void DeInit( acelp );	
extern short int Encoder( acelp, short int *, unsigned char  * , short int );
extern void  Decoder( acelp, unsigned char *, short int * );

 struct acelp_state
  {
    short int Type; 
	 short int *xpi;       
	 short int *PresentC; 
	 short int *FutureC;   
	 short int  *excit;    
	 short int *lpcimem;   
	 short int *memory_swi;

	 short int *ShAcf;   
     long *Acf;

     float *NLpc;  
	 short int *Polp;
	 short int Hcnt ;           
     short int Vcnt ;         
     long Penr ;
     long Nlev ;
     float Penrf ;
     float Nlevf ;

     short int Aen ;  


	 short int x0i;
	 short int x1i;
	 short int x2i;
	 short int y0i;
	 short int y1i;
	 short int y2i;

	 unsigned short int indexNAVQm;
	 unsigned short int indexTVQm;
	 unsigned short int indexSVQ1m;
	 unsigned short int indexSVQ2m;

	 short int yXwi[13];

	 short int *PresentD; 
	 short int *FutureD;  
	 short int *excitDi;   
	 short int *Dyi;      


  };