record.c

s3c2410IIS总线实验代码 实现录音以及放音功能

#include<unistd.h>
#include<fcntl.h>
#include<sys/types.h>
#include<sys/ioctl.h>
#include<stdlib.h>
#include<stdio.h>
#include<linux/soundcard.h>

#define RATE 44000
#define SIZE 16
#define CHANNELS 1

int main(int argc,char * argv[])
{
	int fd,id;
	int arg;
	int status;
	char buf[1024];

	if((id = open(argv[1],O_RDWR | O_CREAT)) < 0)
	{
		printf("Can't open output file!\n");
		exit (1);
	}
	if ((fd = open("/dev/dsp",O_RDONLY)) < 0)
	{
		printf("open of /dev/dsp failed");
		exit(1);
	}

	arg = SIZE;
	status = ioctl(fd,SOUND_PCM_WRITE_BITS,&arg);
	if(status == -1)
		printf("SOUND_PCM_WRITE_BITS ioctl failed");
	if(arg != SIZE)
		printf("unable to set sample size");
	
	arg = CHANNELS; 
	status = ioctl(fd,SOUND_PCM_WRITE_CHANNELS,&arg);
	if(status == -1)
		printf("SOUND_PCM_WRITE_CHANNELS ioctl failed");
	if(arg != CHANNELS)
		printf("unable to set number of channels");
	
	arg = RATE;
	status = ioctl(fd,SOUND_PCM_WRITE_RATE,&arg);
	if(status == -1)
		printf("SOUND_PCM_WRITE_WRITE ioctl failed");

	printf("Say something:\n");
	while(1)
	{
		read(fd,buf,sizeof(buf));
		write(id,buf,sizeof(buf));
	}

	close(id);
	close(fd);
	return 0;
}