commit 73e7387cfae0f00d2c0ec5e2f81acf2a1e4f3541
author zhangjincheng <zhangjincheng@xiaomi.com> Mon Jan 16 17:17:38 2023 +0800
committer Eric Laurent <elaurent@google.com> Tue Mar 28 17:05:55 2023 +0000
tree 1b1c6803e40b7c6214747ff029d89ec4ffb374a2
parent 09b16fd4139574932a28b531f46c3582954642cb

disable audio balance in voip call for mono channel

When modifying "Audio balance" to Right, the mMasterBalanceLeft
will be set to 0.0.  The action will cause no sound on earpiece
in voip calls.

For mono sound, we think the master audio balance should be disabled
when voip for earpiece.

Change-Id: I1ae010d7cd352bf7a9be251775d62c78fc15e1b0
Merged-In: I1ae010d7cd352bf7a9be251775d62c78fc15e1b0
Signed-off-by: zhangjincheng <zhangjincheng@xiaomi.com>

services/audioflinger/Threads.cpp

diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 16c72cc..7ba9243 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -6196,12 +6196,17 @@
         if (left > GAIN_FLOAT_UNITY) {
             left = GAIN_FLOAT_UNITY;
         }
-        left *= v * mMasterBalanceLeft; // DirectOutputThread balance applied as track volume
         right = float_from_gain(gain_minifloat_unpack_right(vlr));
         if (right > GAIN_FLOAT_UNITY) {
             right = GAIN_FLOAT_UNITY;
         }
-        right *= v * mMasterBalanceRight;
+        left *= v;
+        right *= v;
+        if (mAudioFlinger->getMode() != AUDIO_MODE_IN_COMMUNICATION
+                || audio_channel_count_from_out_mask(mChannelMask) > 1) {
+            left *= mMasterBalanceLeft; // DirectOutputThread balance applied as track volume
+            right *= mMasterBalanceRight;
+        }
     }
 
     if (lastTrack) {