commit a6e1f7088d9278f2e873f2099894827ac990248b
author Narsinga Rao Chella <nrchella@codeaurora.org> Fri Oct 22 13:57:32 2021 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Thu May 19 03:27:59 2022 -0700
tree 51956e6760d381799659149a2c911d22ea5a9eff
parent 152f8ff52702fe3a928b571df95016694377f3bb

HAL: Restrict calls to ADM for low-latency usecase

Stream must be registered for AUDIO_OUTPUT_FLAG_FAST and AUDIO_INPUT_FLAG_FAST.
The others are not intended to take this path. If all streams are registered,
they wait for focus which leads to underruns.

Change-Id: I7304a09ee9a6f60b10394a2ed206e365e3b8090e
Signed-off-by: Narsinga Rao Chella <nrchella@codeaurora.org>

hal/audio_hw.c

diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index b9ac139..1e1127c 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -3589,7 +3589,8 @@
             in->pcm = NULL;
             goto error_open;
         }
-        register_in_stream(in);
+        if (in->flags == AUDIO_INPUT_FLAG_FAST)
+            register_in_stream(in);
         if (in->realtime) {
             ATRACE_BEGIN("pcm_in_start");
             ret = pcm_start(in->pcm);
@@ -4445,7 +4446,8 @@
     }
 
     if (ret == 0) {
-        register_out_stream(out);
+        if (out->flags == AUDIO_OUTPUT_FLAG_FAST)
+            register_out_stream(out);
         if (out->realtime) {
             if (out->pcm == NULL || !pcm_is_ready(out->pcm)) {
                 ALOGE("%s: pcm stream not ready", __func__);