audioflinger: clear effect buffers for duplicating output

-Clear effect buffers in threadloop_mix() in case audio
 effects enabled when output threads are not ready
-Also clear mix buffers in threadLoop_sleepTime()when tracks
 are not ready

CRs-Fixed: 765749

Change-Id: I475d42ac0cc68e4856002a9bd4c6c256a6fca70c

1 files changed, 7 insertions, 1 deletions

diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 0a7d4a2..926312e 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -5289,6 +5289,8 @@ void AudioFlinger::DuplicatingThread::threadLoop_mix()
     } else {
         if (mMixerBufferValid) {
             memset(mMixerBuffer, 0, mMixerBufferSize);
+        } else if (mEffectBufferValid) {
+            memset(mEffectBuffer, 0, mEffectBufferSize);
         } else {
             memset(mSinkBuffer, 0, mSinkBufferSize);
         }
@@ -5310,7 +5312,11 @@ void AudioFlinger::DuplicatingThread::threadLoop_sleepTime()
     } else if (mBytesWritten != 0) {
         if (mMixerStatus == MIXER_TRACKS_ENABLED) {
             writeFrames = mNormalFrameCount;
-            memset(mSinkBuffer, 0, mSinkBufferSize);
+            if (mMixerBufferValid) {
+                memset(mMixerBuffer, 0, mMixerBufferSize);
+            } else {
+                memset(mSinkBuffer, 0, mSinkBufferSize);
+            }
         } else {
             // flush remaining overflow buffers in output tracks
             writeFrames = 0;