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aaudio: increase burst size from 1 to 2 msec

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One msec is on the edge and sometimes glitches.
Two msec is more stable and matches the FastMixer burst.

Bug: 63934178
Test: "adb shell getprop aaudio.hw_burst_min_usec" should be 2000
Change-Id: I383c4a3a82283229ae39ca9fb6e2ffdd65ae0014
This commit is contained in:
Phil Burk
2017-07-21 13:48:32 -07:00
parent d6b4004620
commit 2a5d972b0a
1 changed files with 7 additions and 0 deletions
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7
device-common.mk
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@@ -39,6 +39,13 @@ PRODUCT_PROPERTY_OVERRIDES += aaudio.mmap_policy=2
# Allow EXCLUSIVE then fall back to SHARED.
PRODUCT_PROPERTY_OVERRIDES += aaudio.mmap_exclusive_policy=2
# Increase the apparent size of a hardware burst from 1 msec to 2 msec.
# A "burst" is the number of frames processed at one time.
# That is an increase from 48 to 96 frames at 48000 Hz.
# The DSP will still be bursting at 48 frames but AAudio will think the burst is 96 frames.
# A low number, like 48, might increase power consumption or stress the system.
PRODUCT_PROPERTY_OVERRIDES += aaudio.hw_burst_min_usec=2000
# Enable SM log mechanism by default
ifneq (,$(filter userdebug eng, $(TARGET_BUILD_VARIANT)))
PRODUCT_PROPERTY_OVERRIDES += \