55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
#include "oslib/audiobackend_oss.h"
|
|
#ifdef USE_OSS
|
|
#include <sys/ioctl.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/soundcard.h>
|
|
|
|
static int oss_audio_fd = -1;
|
|
|
|
static void oss_init()
|
|
{
|
|
oss_audio_fd = open("/dev/dsp", O_WRONLY);
|
|
if (oss_audio_fd < 0)
|
|
{
|
|
printf("Couldn't open /dev/dsp.\n");
|
|
}
|
|
else
|
|
{
|
|
printf("sound enabled, dsp openned for write\n");
|
|
int tmp=44100;
|
|
int err_ret;
|
|
err_ret=ioctl(oss_audio_fd,SNDCTL_DSP_SPEED,&tmp);
|
|
printf("set Frequency to %i, return %i (rate=%i)\n", 44100, err_ret, tmp);
|
|
int channels=2;
|
|
err_ret=ioctl(oss_audio_fd, SNDCTL_DSP_CHANNELS, &channels);
|
|
printf("set dsp to stereo (%i => %i)\n", channels, err_ret);
|
|
int format=AFMT_S16_LE;
|
|
err_ret=ioctl(oss_audio_fd, SNDCTL_DSP_SETFMT, &format);
|
|
printf("set dsp to %s audio (%i/%i => %i)\n", "16bits signed", AFMT_S16_LE, format, err_ret);
|
|
}
|
|
}
|
|
|
|
static u32 oss_push(void* frame, u32 samples, bool wait)
|
|
{
|
|
write(oss_audio_fd, frame, samples*4);
|
|
return 1;
|
|
}
|
|
|
|
static void oss_term() {
|
|
if(oss_audio_fd >= 0)
|
|
{
|
|
close(oss_audio_fd);
|
|
}
|
|
}
|
|
|
|
audiobackend_t audiobackend_oss = {
|
|
"oss", // Slug
|
|
"Open Sound System", // Name
|
|
&oss_init,
|
|
&oss_push,
|
|
&oss_term
|
|
};
|
|
|
|
#endif
|