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author | The Android Open Source Project <initial-contribution@android.com> | 2013-11-22 10:35:20 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2013-11-22 10:35:20 -0800 |
commit | 5bf2560ce9b70bee077e0c264ac06648f0f63acc (patch) | |
tree | f17ecec5321e8d583d045135f29f14f3c7418e71 /services/audioflinger/StateQueue.h | |
parent | eb76f318e9daf91dbf195bcb74852b3bd736a32a (diff) | |
parent | b2059ff384eee8ffb70a7ec8fc5570405201c734 (diff) | |
download | frameworks_av-5bf2560ce9b70bee077e0c264ac06648f0f63acc.zip frameworks_av-5bf2560ce9b70bee077e0c264ac06648f0f63acc.tar.gz frameworks_av-5bf2560ce9b70bee077e0c264ac06648f0f63acc.tar.bz2 |
Merge commit 'b2059ff384eee8ffb70a7ec8fc5570405201c734' into HEAD
Diffstat (limited to 'services/audioflinger/StateQueue.h')
-rw-r--r-- | services/audioflinger/StateQueue.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/services/audioflinger/StateQueue.h b/services/audioflinger/StateQueue.h index e33b3c6..9cde642 100644 --- a/services/audioflinger/StateQueue.h +++ b/services/audioflinger/StateQueue.h @@ -31,8 +31,14 @@ // and this may result in an audible artifact // needs read-only access to a recent stable state, // but not necessarily the most current one +// only allocate and free memory when configuration changes +// avoid conventional logging, as this is a form of I/O and could block +// defer computation to other threads when feasible; for example +// cycle times are collected by fast mixer thread but the floating-point +// statistical calculations on these cycle times are computed by normal mixer +// these requirements also apply to callouts such as AudioBufferProvider and VolumeProvider // Normal mixer thread: -// periodic with typical period ~40 ms +// periodic with typical period ~20 ms // SCHED_OTHER scheduling policy and nice priority == urgent audio // ok to block, but prefer to avoid as much as possible // needs read/write access to state |