From fb1fdc9d6603aa228362e7349451f6455c9849c2 Mon Sep 17 00:00:00 2001 From: Glenn Kasten Date: Wed, 10 Jul 2013 17:03:19 -0700 Subject: Add comments Change-Id: Ifbf3a46a4183c8abc0feee1c588953ab10303cc1 --- services/audioflinger/StateQueue.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'services/audioflinger/StateQueue.h') 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 -- cgit v1.1