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author | Glenn Kasten <gkasten@google.com> | 2013-07-10 17:03:19 -0700 |
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committer | Glenn Kasten <gkasten@google.com> | 2013-07-10 17:08:15 -0700 |
commit | fb1fdc9d6603aa228362e7349451f6455c9849c2 (patch) | |
tree | 1caac6c881db81bcfedb596b292ce62ecbaf6a2c /services/audioflinger/StateQueue.h | |
parent | 551ababe67ce31778000d52958e53e1c56e1a294 (diff) | |
download | frameworks_av-fb1fdc9d6603aa228362e7349451f6455c9849c2.zip frameworks_av-fb1fdc9d6603aa228362e7349451f6455c9849c2.tar.gz frameworks_av-fb1fdc9d6603aa228362e7349451f6455c9849c2.tar.bz2 |
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Change-Id: Ifbf3a46a4183c8abc0feee1c588953ab10303cc1
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 |