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/* the *.wav must be 8000Hz 64kbps  8bits MONO(1)*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/soundcard.h> /*for OSS style sound programing */
#define BUFF_SIZE  512 /*buffer size:512 Bytes */
#define FMT8BITS AFMT_U8 /*unsigned 8 bits(for almost PC) */
#define FMT16BITS AFMT_S16_LE /*signed 16 bits,little endian */
#define FMT8K    8000 /*default sampling rate */
#define FMT11K   11025 /*11,22,44,48 are three pop rate */
#define FMT22K   22050
#define FMT44K   44100
#define FMT48K  48000
#define MONO     1
#define STEREO   2
int main(int argc, char *argv[])
{
    if(argc!=2)
        printf("input error! ./playvoice filename");
   
    int fd; //for device
 fd=open("/dev/dsp",O_WRONLY);
 if (fd<0){
  perror("Can't open /dev/dsp");
  return -1;
 }
 
 int outfile;
 outfile=open(argv[1],O_RDONLY);
 if (outfile<0) {
  perror("Cannot open file for writing");
  return -1;
 }
 
    /* set bit format */
    int bits = FMT16BITS;
    if (ioctl(fd, SNDCTL_DSP_SETFMT, &bits) == -1) {
 fprintf(stderr, "Set fmt to bit %d failed:%s\n", bits,
  strerror(errno));
 return (-1);
    }
    if (bits != FMT16BITS) {
 fprintf(stderr, "do not support bit %d, supported 8¡¢16\n", bits);
 return (-1);
    }
    /*set channel */
    int channel = MONO;
    if ((ioctl(fd, SNDCTL_DSP_CHANNELS, &channel)) == -1) {
 fprintf(stderr, "Set Au