commit 6140c79c31f5dc237fba69554de5be641cedf113
author Phil Burk <philburk@google.com> Thu Mar 19 14:30:21 2015 -0700
committer Phil Burk <philburk@google.com> Mon Mar 23 12:49:00 2015 -0700
tree 47bd7b5544c7e76f49956629f91168e3b493add7
parent 377165c24968b044faccaf366a2377fa32143e2f

AudioFlinger: prevent retrograde timestamps for direct mode

Prevent retrograde motion in the HAL or drivers from making it
up through the AudioFlinger to the app.

Bug: 19604395
Change-Id: I11d6c0f7cab69e75fd4b4a2a90f64960b4bb6d5a
Signed-off-by: Phil Burk <philburk@google.com>

services/audioflinger/PlaybackTracks.h

diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 902d5e4..45df6a9 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -157,8 +157,9 @@
     bool                mFlushHwPending; // track requests for thread flush
 
     // for last call to getTimestamp
-    bool                mPreviousValid;
-    uint32_t            mPreviousFramesWritten;
+    bool                mPreviousTimestampValid;
+    // This is either the first timestamp or one that has passed
+    // the check to prevent retrograde motion.
     AudioTimestamp      mPreviousTimestamp;
 };  // end of Track