AOSP CL "Add pcm_get_poll_fd"

https://android.googlesource.com/platform/external/tinyalsa/+/b42510d55bafc96805a44bd6ac40faac28ebd219

commit	b42510d55bafc96805a44bd6ac40faac28ebd219
author	Dylan Reid <dgreid@chromium.org>

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
ready.

Change-Id: I61375a73d7a842b00362fc707c12f99aa18e0bdf
Signed-off-by: Dylan Reid <dgreid@chromium.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/pcm.c b/src/pcm.c
index e88c18c..eb16ed3 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -1344,6 +1344,11 @@ static int pcm_mmap_transfer_areas(struct pcm *pcm, char *buf,
     return count;
 }
 
+int pcm_get_poll_fd(struct pcm *pcm)
+{
+    return pcm->fd;
+}
+
 int pcm_avail_update(struct pcm *pcm)
 {
     pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_APPL|SNDRV_PCM_SYNC_PTR_AVAIL_MIN);