{
#ifdef DEBUG_WARN
printf("Set speed to %d:%d\\n", hz, nWhich);
#endif
return 0;
}
return 1;
}
/*
* Set Sound Card Channel
* return 1 if success, else return 0.
* chn -- MONO, STERO
*/
int SetChannel(int chn)
{
int tmp = chn;
if(-1 == ioctl(devfd, SNDCTL_DSP_CHANNELS, &tmp))
{
#ifdef DEBUG_WARN
printf("Set Audio Channel faile:%d\\n", nWhich);
#endif
return 0;
}
return 1;
}
/*
* Record
* return numbers of byte for read.
*/
int Record(char *buf, int size)
{
return read(devfd, buf, size);
}
/*
* Playback
* return numbers of byte for write.
*/
int Play(char *buf, int size)
{
return write(devfd, buf, size);
}
test.c
代码:
// A sample to test record and playback.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "sndtools.h"
int main()
{
char *buf;
int dwSize;
if(!OpenSnd())
{
printf("Open sound device error!\\n");
exit(-1);
}
SetFormat(FMT16BITS, FMT8K, WAVOUTDEV);
SetChannel(MONO, WAVOUTDEV);
buf = (char *)malloc(320);
if(buf == NULL)
exit(-1);
for(int i = 0; i <1000; i++)
{
dwSize = Record(buf, 640);
dwSize = Play(buf, dwSize);
}
exit 1;
}
