commit 2812d9ea3a3a33142dd8e23c9d949c498d6f7a12
author Phil Burk <philburk@google.com> Mon Jan 04 10:34:30 2016 -0800
committer Phil Burk <philburk@google.com> Sat Jan 16 11:21:38 2016 -0800
tree 5079c758817d0c42b3f7ade661366fdae25fe5d1
parent e0db30868d9734f95a02df516dd0dc6a7226474b

AudioTrack: Add getUnderrunCount()

This allows an app to detect application-level output glitches.
Underrun counts survive track recreation.

Change-Id: I8eb14e92f6fc1007718a29b0666ab51ace30cdb8
Bug: 25641253
Signed-off-by: Phil Burk <philburk@google.com>

services/audioflinger/Threads.cpp

diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 65166b0..0458554 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -3788,6 +3788,8 @@
                     recentUnderruns > 0) {
                 // FIXME fast mixer will pull & mix partial buffers, but we count as a full underrun
                 track->mAudioTrackServerProxy->tallyUnderrunFrames(recentUnderruns * mFrameCount);
+            } else {
+                track->mAudioTrackServerProxy->tallyUnderrunFrames(0);
             }
 
             // This is similar to the state machine for normal tracks,
@@ -4157,7 +4159,10 @@
                 ALOGV("track(%p) underrun,  framesReady(%zu) < framesDesired(%zd)",
                         track, framesReady, desiredFrames);
                 track->mAudioTrackServerProxy->tallyUnderrunFrames(desiredFrames);
+            } else {
+                track->mAudioTrackServerProxy->tallyUnderrunFrames(0);
             }
+
             // clear effect chain input buffer if an active track underruns to avoid sending
             // previous audio buffer again to effects
             chain = getEffectChain_l(track->sessionId());