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研发客服#include
#include
#include
#include
#include
#include
#include
#include
#define LENGTH 3
#define RATE 8000
#define SIZE 8
#define CHANNELS 1
unsigned char buf[LENGTH * RATE * SIZE * CHANNELS /8];
int main()
{
int fd_r,fd_w;
int arg;
int status;
pid_t pid;
int recing = 1,playing = 0;
pid = fork();
if(pid < 0){
perror("error in forkn");
}
if(pid == 0){
fd_r = open("/dev/dsp",O_RDONLY);
if(fd_r < 0){
perror("open read of /dev/dsp failed");
exit(1);
}
arg = SIZE;
status = ioctl(fd_r,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_r,SOUND_PCM_WRITE_CHANNELS,&arg);
if(status == -1)
perror("SOUND_PCM_WRITE_CHANNELS ioctl failed");
if(arg != CHANNELS)
perror("unable to set number of channels");
arg = RATE;
status = ioctl(fd_r,SOUND_PCM_WRITE_RATE,&arg);
if(status == -1)
perror("SOUND_PCM_WRITE_WRITE ioctl failed");
while(1)
{
if(playing== 0){
recing = 1;
printf("Say something:");
status = read(fd_r,buf,sizeof(buf));
/* recording*/
if(status != sizeof(buf))
perror("read wrong number of bytes");
recing = 0;
}
}
}
else {
fd_w = open("/dev/dsp",O_WRONLY);
if(fd_w < 0)
{
perror("open write of /dev/dsp failed");
exit(1);
}
arg = SIZE;
status = ioctl(fd_w,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_w,SOUND_PCM_WRITE_CHANNELS,&arg);
if(status == -1)
perror("SOUND_PCM_WRITE_CHANNELS ioctl failed");
if(arg != CHANNELS)
perror("unable to set number of channels");
arg = RATE;
status = ioctl(fd_w,SOUND_PCM_WRITE_RATE,&arg);
if(status == -1)
perror("SOUND_PCM_WRITE_WRITE ioctl failed");
while(1)
{
if(recing == 0){
playing = 1;
status = write(fd_w,buf,sizeof(buf));
/* playback */
if(status != sizeof(buf))
perror("wrote wrong number of bytes");
status = ioctl(fd_w,SOUND_PCM_SYNC,0);
if(status == -1)
perror("SOUND_PCM_SYNC ioctl failed");
playing = 0;
}
}
}
}