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Commit 81a29444 authored by Robert Wu's avatar Robert Wu
Browse files

Lower bluetooth output buffer size 

The current bluetooth buffer is 10ms, resulting in a burst size of
441 frames. When this number is reduced to 2ms to be more inline
with the primary audio hal or the usb hal, the latency on a Boltune
headset on Bramble is lowered from 367ms to 337ms.

Bug: 196269772
Tag: #refactor
Test: Turn off bt offloading and test change manually
Change-Id: I5dbc6d7d1a69c5bc6ef8012095b4d964684761da
parent b999d4d0

system/audio_bluetooth_hw/stream_apis.h

+1 −1
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ constexpr audio_format_t kBluetoothDefaultAudioFormatBitsPerSample = 
constexpr unsigned int kBluetoothDefaultInputBufferMs = 20;

constexpr unsigned int kBluetoothDefaultInputStateTimeoutMs = 20;



constexpr unsigned int kBluetoothDefaultOutputBufferMs = 10;

constexpr unsigned int kBluetoothDefaultOutputBufferMs = 2;

constexpr audio_channel_mask_t kBluetoothDefaultOutputChannelModeMask =

    AUDIO_CHANNEL_OUT_STEREO;

constexpr audio_channel_mask_t kBluetoothDefaultInputChannelModeMask =