getsend.c

dsp AD公司ADSP21的代码,里面有FFT FIR IIR EQULIZER G722_21F 等可以在项目中直接应用的代码.此代码的来源是ADI公司自己出版的书籍,此书在美国购得

#include <stdlib.h>
#include <stdio.h>

/* GETSEND.C - getinput(), sendout(), and flush() functions for
               PC based simulation using ASCII text disk I/O.
*/

/* getinput - get one sample from disk to simulate realtime input */

float getinput()
{
    static FILE *fp = NULL;
    float x;
/* open input file if not done in previous calls */
    if(!fp) {
        char s[80];
        printf("\nEnter input file name ? ");
        gets(s);
        fp = fopen(s,"r");
        if(!fp) {
            printf("\nError opening input file in GETINPUT\n");
            exit(1);
        }
    }
/* read data until end of file */
    if(fscanf(fp,"%f",&x) != 1) exit(1); 
    return(x);
}

/* sendout - send sample to disk to simulate realtime output */

void sendout(float x)
{
    static FILE *fp = NULL;
/* open output file if not done in previous calls */
    if(!fp) {
        char s[80];
        printf("\nEnter output file name ? ");
        gets(s);
        fp = fopen(s,"w");
        if(!fp) {
            printf("\nError opening output file in SENDOUT\n");
            exit(1);
        }
    }
/* write the sample and check for errors */
    if(fprintf(fp,"%f\n",x) < 1) {
        printf("\nError writing output file in SENDOUT\n");
        exit(1);
    }
}

/* dummy routine for flush */

void flush()
{
}