Linux»·¾³ÏÂÓÃcÓïÑÔдµÄ²¥·ÅwavÎļþµÄС³ÌÐò

#include <unistd.h>
#include <fcntl.h>
#include
<sys/types.h>
#include <sys/ioctl.h>
#include
<stdlib.h>
#include <stdio.h>
#include
<linux/soundcard.h>
/* ÏÂÃæµÄÈý¸ö²ÎÊýÊǸú¾ßÌåÎļþÏà¹ØµÄ£¬ÎļþʲôÑù£¬¾ÍÒªÉèÖóÉʲôÑù */
#define RATE 11025  
#define SIZE 16    
#define CHANNELS
2  // 1±íʾµ¥ÉùµÀ£¬2ΪÁ¢ÌåÉù
/* ................ */
unsigned char
buf[RATE*SIZE/8]; //bufÀïÃæÕýºÃ·ÅÒ»ÃëÖÓµÄÒôƵ£¬ÏÂÃæµÄ¼Æʱ»¹ÒªÓÃ
int main()
{
    int fd;
    int wavfd; //wavÎļþµÄÃèÊö·û
    int arg;        /* ..ioctl..... */
    int status;   /*
........ */
                /* ...... */
    fd = open("/dev/dsp",
O_RDWR);      
    if (fd < 0) {
        printf("open of /dev/dsp failed");
       
exit(1);
}
    wavfd = open("a.wav",O_RDONLY);
    if (wavfd
< 0) {
        printf("open of wav failed");
        exit(1);
 
}
 
/* .......... */
    arg = SIZE;
    status = ioctl(fd,
SOUND_PCM_WRITE_BITS, &arg);
    if (status == -1)
        
perror("SOUND_PCM_WRITE_BITS ioctl failed");
    if (arg != SIZE)
        
perror("unable to set sample size");
 
/* .......... */
    arg = CHANNELS;
    status = ioctl(fd,
SOUND_PCM_WRITE_CHANNELS, &arg);
    if (status == -1)
 &nb