Is there any way to wait for alsa events through epoll mechanism?

Question

我通过snd_pcm_poll_descriptors填充的struct pollfd结构的fd字段来获取alsa设备fd ...但是，当涉及到epoll_wait产生的“ demangle”事件时，snd_pcm_poll_descriptors_revents却无济于事，因为仅struct pollfd适合它的参数。

Answer 1

When you get an epoll notification about a file descriptor, set the corresponding bit(s) in the revents field of the original struct pollfd . Then you can call snd_pcm_poll_descriptors() .