commit 97350f9df7252c881f011a410fcd9e6d766d2bee
author Phil Burk <philburk@google.com> Fri Jul 21 15:59:44 2017 -0700
committer Phil Burk <philburk@google.com> Wed Aug 02 10:57:31 2017 -0700
tree fab6334a25607e03276648611584b8fc23b40463
parent eb1c0658e405e5b7e26f4b16761c5b1ce3f77d46

aaudio: improve accuracy of timestamps

Account for latency added by the AAudio service.
Fix input timestamps.

Bug: 37080396
Test: test_timestamps.cpp input_monitor.cpp
Change-Id: I1053cd21af722bb9b9371df4e5731bf4a0a57b0b

services/oboeservice/AAudioServiceStreamMMAP.h

diff --git a/services/oboeservice/AAudioServiceStreamMMAP.h b/services/oboeservice/AAudioServiceStreamMMAP.h
index 533e5a8..e6f8fad 100644
--- a/services/oboeservice/AAudioServiceStreamMMAP.h
+++ b/services/oboeservice/AAudioServiceStreamMMAP.h
@@ -100,6 +100,8 @@
     aaudio_result_t getDownDataDescription(AudioEndpointParcelable &parcelable) override;
 
     aaudio_result_t getFreeRunningPosition(int64_t *positionFrames, int64_t *timeNanos) override;
+    virtual aaudio_result_t getHardwareTimestamp(int64_t *positionFrames,
+                                                 int64_t *timeNanos) override;
 
 private:
     // This proxy class was needed to prevent a crash in AudioFlinger
@@ -132,6 +134,7 @@
     MonotonicCounter                    mFramesRead;
     int32_t                             mPreviousFrameCounter = 0;   // from HAL
     int                                 mAudioDataFileDescriptor = -1;
+    int64_t                             mHardwareTimeOffsetNanos = 0; // TODO get from HAL
 
     // Interface to the AudioFlinger MMAP support.
     android::sp<android::MmapStreamInterface> mMmapStream;