25 Mar
2006
25 Mar
'06
4:03 a.m.
2006/3/24, kurmisk <kurmisk(a)inbox.lv>lv>:
I have write my small _alsa_test_program_.
[C code ckunkz see below]
It works good but now i wanna before call
rc = snd_pcm_writei(handle, buffer, frames);
somehow check - is sound device free for this call or not.
For OSS i have such problem solve with select() :
fdo = open("/dev/dsp", O_WRONLY );
.....
FD_ZERO(&wfds);
FD_SET( fdo , &wfds); Zeit.tv_sec=0; Zeit.tv_usec=1;
response=select(fdo+1, NULL, &wfds, NULL, & Zeit );
You can use snd_pcm_poll_descriptors to get a fildescriptor to select on.
-Richard