commit 01eb164076a1bd90e1f22a91eb6643eec1c6455d
author Eric Laurent <elaurent@google.com> Fri Dec 16 11:45:07 2022 +0100
committer Shunkai Yao <yaoshunkai@google.com> Wed Jan 04 19:53:13 2023 +0000
tree b7fea5d2d99d8cc4e1eac468d4093349c3b83a72
parent ce46680753f2fe95bbccb04aaa79b8dfa08d7c72

audio flinger: Bluetooth latency mode control

Add APIs to discover support and control the use
of latency mode control over Bluetooth link.

Bug: 257922898
Test: make

Merged-In: I8d23a40f21465d566f0adc553cfc77e64571395e
Change-Id: I8d23a40f21465d566f0adc553cfc77e64571395e

services/audioflinger/Threads.cpp

diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index a4c1832..cab114b 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -2063,7 +2063,8 @@
         mHwSupportsPause(false), mHwPaused(false), mFlushPending(false),
         mLeftVolFloat(-1.0), mRightVolFloat(-1.0),
         mDownStreamPatch{},
-        mIsTimestampAdvancing(kMinimumTimeBetweenTimestampChecksNs)
+        mIsTimestampAdvancing(kMinimumTimeBetweenTimestampChecksNs),
+        mBluetoothLatencyModesEnabled(true)
 {
     snprintf(mThreadName, kThreadNameLength, "AudioOut_%X", id);
     mNBLogWriter = audioFlinger->newWriter_l(kLogSize, mThreadName);
@@ -7434,6 +7435,15 @@
     return NO_ERROR;
 }
 
+status_t AudioFlinger::PlaybackThread::setBluetoothLatencyModesEnabled(bool enabled) {
+    if (mOutput == nullptr || mOutput->audioHwDev == nullptr
+            || !mOutput->audioHwDev->supportsBluetoothLatencyModes()) {
+        return INVALID_OPERATION;
+    }
+    mBluetoothLatencyModesEnabled.store(enabled);
+    return NO_ERROR;
+}
+
 void AudioFlinger::SpatializerThread::checkOutputStageEffects()
 {
     bool hasVirtualizer = false;