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OSS sound now retries opening /dev/dsp up to 3 times if it fails the first 

time, by checking whether the device is busy or temporarily unavailable (I
haven't seen the latter happen, but the former may occur if your window
manager is set to make noise when a window pops up). Between tries, the
client sleep()'s for one second (should this be half a second or even
faster?).
This commit is contained in:
Jeff Teunissen 2000-10-11 10:34:23 +00:00
parent 4173134bae
commit 40269b2bb5
1 changed files with 15 additions and 7 deletions
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22
source/snd_oss.c
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@ -36,6 +36,7 @@
#include <sys/types.h>
#include <sys/shm.h>
#include <sys/wait.h>
#include <errno.h>
#include <stdio.h>
#ifdef HAVE_SYS_IOCTL_H
@ -78,17 +79,24 @@ SNDDMA_Init(void)
char *s;
struct audio_buf_info info;
int caps;
int retries = 3;
snd_inited = 0;
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
audio_fd = open("/dev/dsp", O_RDWR);
if (audio_fd < 0)
{
perror("/dev/dsp");
Con_Printf("Could not open /dev/dsp\n");
return 0;
audio_fd = open ("/dev/dsp", O_RDWR);
if (audio_fd < 0) { // Failed open, retry up to 3 times if it's busy
while ((audio_fd < 0) && retries-- &&
((errno == EAGAIN) || (errno == EBUSY))) {
sleep (1);
audio_fd = open ("/dev/dsp", O_RDWR);
}
if (audio_fd < 0) {
perror ("/dev/dsp");
Con_Printf ("Could not open /dev/dsp\n");
return 0;
}
}
rc = ioctl(audio_fd, SNDCTL_DSP_RESET, 0);