Add pcm_get_poll_fd

Similar to ALSA snd_pcm_get_poll_fd, this will allow a user to wait for
a sound device to have data in a poll(2) call.  The hotword thread will
use this to wait for a message on its socket or for audio data to become

Change-Id: I61375a73d7a842b00362fc707c12f99aa18e0bdf
Signed-off-by: Dylan Reid <>
2 files changed